U.S. patent application number 12/818195 was filed with the patent office on 2010-10-07 for locate transmitter having enhanced features for underground facility locate operations, and associated methods and systems.
This patent application is currently assigned to CertusView Technologies, LLC. Invention is credited to Curtis Chambers, Jeffrey Farr, Steven Nielsen.
Application Number | 20100253513 12/818195 |
Document ID | / |
Family ID | 42355392 |
Filed Date | 2010-10-07 |
United States Patent
Application |
20100253513 |
Kind Code |
A1 |
Nielsen; Steven ; et
al. |
October 7, 2010 |
LOCATE TRANSMITTER HAVING ENHANCED FEATURES FOR UNDERGROUND
FACILITY LOCATE OPERATIONS, AND ASSOCIATED METHODS AND SYSTEMS
Abstract
A locate transmitter and method for a locate operation to detect
the presence or absence of an underground facility. An applied
signal is generated, to be applied along the underground facility,
and one or more environmental conditions of an environment are
detected. Output signals representing the detected signals may be
logged into local memory and/or provided to one or more processors
for analysis and/or transmission.
Inventors: |
Nielsen; Steven; (North Palm
Beach, FL) ; Chambers; Curtis; (Palm Beach Gardens,
FL) ; Farr; Jeffrey; (Jupiter, FL) |
Correspondence
Address: |
WOLF GREENFIELD & SACKS, P.C.
600 ATLANTIC AVENUE
BOSTON
MA
02210-2206
US
|
Assignee: |
CertusView Technologies,
LLC
Palm Beach Gardens
FL
|
Family ID: |
42355392 |
Appl. No.: |
12/818195 |
Filed: |
June 18, 2010 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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12704087 |
Feb 11, 2010 |
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12818195 |
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12571329 |
Sep 30, 2009 |
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12704087 |
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61151578 |
Feb 11, 2009 |
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61232112 |
Aug 7, 2009 |
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61235519 |
Aug 20, 2009 |
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61102122 |
Oct 2, 2008 |
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Current U.S.
Class: |
340/540 |
Current CPC
Class: |
G01V 3/15 20130101; G01V
3/08 20130101 |
Class at
Publication: |
340/540 |
International
Class: |
G08B 21/00 20060101
G08B021/00 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 10, 2010 |
CA |
2692115 |
Claims
1. A locate transmitter for use in a locate operation to detect the
presence or absence of an underground facility, the locate
transmitter comprising: transmitter circuitry configured to
generate an applied signal to be applied along the underground
facility; at least one processor communicatively coupled to the
transmitter circuitry; and at least one input device
communicatively coupled to the at least one processor and
configured to sense at least one environmental condition of an
environment in which the locate transmitter is located and provide
an output signal to the at least one processor indicative of the
sensed at least one environmental condition.
2. The locate transmitter of claim 1, further comprising a memory
communicatively coupled to the at least one processor and
configured to store information relating to the output signal of
the at least one input device.
3. The locate transmitter of claim 1, wherein the at least one
input device comprises a humidity sensor and wherein the at least
one environmental condition is humidity of the environment.
4. The locate transmitter of claim 1, wherein the at least one
input device comprises a temperature sensor and wherein the at
least one environmental condition is an ambient temperature of the
environment.
5. The locate transmitter of claim 1, wherein the at least one
input device comprises a moisture measurement device configured to
measure a moisture content of a material to which an electrical
ground connection is made by the locate transmitter, and wherein
the at least one environmental condition is the moisture content of
the material.
6. The locate transmitter of claim 5, wherein the moisture
measurement device forms at least part of an electrical ground
probe configured to electrically ground the locate transmitter.
7. The locate transmitter of claim 1, wherein the at least one
input device comprises an altitude sensor and wherein the at least
one environmental condition is an altitude of the locate
transmitter.
8. The locate transmitter of claim 1, wherein the at least one
input device comprises a light sensor and wherein the at least one
environmental condition is an amount of ambient light in the
environment.
9. The locate transmitter of claim 8, further comprising a light
source.
10. The locate transmitter of claim 9, wherein the light source is
configured to be automatically activated in response to the output
signal of the at least one input device indicating the amount of
ambient light is below a threshold value.
11. The locate transmitter of claim 1, further comprising an image
capture device configured to provide an output signal to the at
least one processor.
12. The locate transmitter of claim 1, wherein the at least one
input device comprises an audio recorder configured to acquire
acoustic signals from the environment, and wherein the output
signal represents at least part of an acquired acoustic signal.
13. The locate transmitter of claim 1, wherein the at least one
processor is programmed with processor-executable instructions
which, when executed, cause the at least one processor to compare
the output signal of the at least one input device to at least one
target value.
14. The locate transmitter of claim 13, wherein the at least one
processor is further configured to disable the transmitter
circuitry in response to the comparison of the output signal of the
at least one input device to the at least one target value.
15. The locate transmitter of claim 13, wherein the at least one
processor is further configured to log into an electronic record an
indication of a result of the comparison.
16. The locate transmitter of claim 13, wherein the at least one
processor is further configured to control generation of an alert
in response to the comparison of the output signal of the at least
one input device to the at least one target value.
17. The locate receiver of claim 16, wherein the alert is an
audible alert.
18. The locate transmitter of claim 16, wherein the alert is a
visible alert.
19. The locate transmitter of claim 18, wherein the visible alert
is a text and/or graphics-based alert.
20. The locate transmitter of claim 18, wherein the visible alert
is a lighted alert.
21. The locate receiver of claim 16, wherein the alert is a tactile
alert.
22. The locate transmitter of claim 13, further comprising a memory
communicatively coupled to the at least one processor and
configured to store the at least one target value.
23. The locate transmitter of claim 1, further comprising a
location tracking system communicatively coupled to the at least
one processor and configured to determine a location of the locate
transmitter.
24. The locate transmitter of claim 1, further comprising a ground
probe configured to establish an electrical ground connection for
the locate transmitter, wherein the locate transmitter further
comprises a location tracking system communicatively coupled to the
at least one processor and configured to determine a location of
the ground probe.
25. The locate transmitter of claim 1, further comprising a clamp
configured to establish an electrical connection for the locate
transmitter to the underground facility, wherein the locate
transmitter further comprises a location tracking system
communicatively coupled to the at least one processor and
configured to determine a location of the clamp.
26. The locate transmitter of claim 1, further comprising a ground
probe configured to establish an electrical ground connection for
the locate transmitter and a clamp configured to establish an
electrical connection for the locate transmitter to the underground
facility, and wherein the locate transmitter further includes a
first location tracking system configured to determine a location
of the ground probe and a second location tracking system
configured to determine a location of the clamp.
27. The locate transmitter of claim 1, wherein the at least one
input device comprises a first input device configured to sense a
first environmental condition of the environment in which the
locate transmitter is located and a second input device configured
to sense a second environmental condition of the environment in
which the locate transmitter is located, and wherein the at least
one processor is configured to process an output signal of the
first input device in combination with an output signal of the
second input device to assess a state of the environment in which
the locate transmitter is located.
28. The locate transmitter of claim 1, further comprising at least
one input device communicatively coupled to the at least one
processor and configured to sense an operating condition of the
locate transmitter and provide an output signal to the at least one
processor indicative of the sensed operating condition.
29. The locate transmitter of claim 28, wherein the at least one
input device communicatively coupled to the at least one processor
and configured to sense an operating condition of the locate
transmitter is an accelerometer, and wherein the operating
condition is an acceleration of the locate transmitter.
30. The locate transmitter of claim 28, wherein the at least one
input device communicatively coupled to the at least one processor
and configured to sense an operating condition of the locate
transmitter is a temperature sensor and wherein the operating
condition is a temperature of the at least one processor.
31. The locate transmitter of claim 28, wherein the at least one
input device communicatively coupled to the at least one processor
and configured to sense an operating condition of the locate
transmitter is a frequency measurement device configured to measure
a frequency of the applied signal and wherein the operating
condition is the frequency of the applied signal.
32. The locate transmitter of claim 28, wherein the at least one
input device communicatively coupled to the at least one processor
and configured to sense an operating condition of the locate
transmitter is a power meter and wherein the operating condition is
a wattage of the applied signal.
33. The locate transmitter of claim 28, wherein the at least one
input device communicatively coupled to the at least one processor
and configured to sense an operating condition of the locate
transmitter is an electrical ground detector and wherein the
operating condition is a quality of an electrical ground connection
made by the locate transmitter.
34. The locate transmitter of claim 28, wherein the at least one
input device communicatively coupled to the at least one processor
and configured to sense an operating condition of the locate
transmitter is a device health sensor configured to monitor a
battery level of a battery of the locate transmitter, and wherein
the operating condition is the battery level.
35. The locate transmitter of claim 28, wherein the at least one
input device communicatively coupled to the at least one processor
and configured to sense an operating condition of the apparatus is
an accelerometer configured to sense an inclination of the locate
transmitter.
36. The locate transmitter of claim 28, wherein the at least one
input device communicatively coupled to the at least one processor
and configured to sense an operating condition of the apparatus is
an inclinometer and wherein the operating condition is an
inclination of the locate transmitter.
37. The locate transmitter of claim 28, wherein the at least one
input device communicatively coupled to the at least one processor
and configured to sense an operating condition of the locate
transmitter is a proximity sensor and wherein the operating
condition is a distance.
38. The locate transmitter of claim 37, wherein the operating
condition is a distance of the locate transmitter to a target
surface.
39. The locate transmitter of claim 28, further comprising a
location tracking system communicatively coupled to the at least
one processor and configured to determine a location of the locate
transmitter.
40. The locate transmitter of claim 1, further comprising a tactile
indicator configured to generate a tactile indication in response
to the output signal being provided to the at least one processor
by the at least one input device.
41. A method of using a locate transmitter in a locate operation to
detect a presence or absence of an underground facility, the method
comprising: A) generating an applied signal to be applied along the
underground facility; B) detecting, via at least one input device
of the locate transmitter, at least one environmental condition of
an environment in which the locate transmitter is located; and C)
logging into local memory of the locate transmitter locate
information relating at least in part to A) and B).
42. The method of claim 41, wherein C) is performed in response to
initiation of A).
43. The method of claim 41, wherein B) comprises detecting an
ambient temperature of the environment in which the locate
transmitter is located.
44. The method of claim 41, wherein B) comprises detecting a
moisture content of a material to which an electrical ground
connection is made by the locate transmitter.
45. The method of claim 44, wherein detecting the moisture content
comprises using a probe configured to establish an electrical
ground connection for the locate transmitter.
46. The method of claim 41, wherein B) comprises detecting a
humidity of the environment in which the locate transmitter is
located.
47. The method of claim 41, wherein B) comprises detecting an
amount of ambient light in the environment in which the locate
transmitter is located.
48. The method of claim 41, wherein B) comprises detecting an
altitude of a location at which the locate transmitter is
located.
49. The method of claim 41, further comprising: D) acquiring data
from an image capture device of the locate transmitter.
50. The method of claim 41, further comprising: D) acquiring audio
input.
51. The method of claim 41, wherein the at least one environmental
condition is a first environmental condition, and wherein the
method further comprises: D) detecting a second environmental
condition of the environment; and E) processing in combination
information about the first environmental condition and the second
environmental condition to assess a state of the environment in
which the locate transmitter is located.
52. The method of claim 41, further comprising: D) detecting, via
at least one input device of the locate transmitter, at least one
operating condition of the locate transmitter, and E) logging into
local memory of the locate transmitter locate information relating
at least in part to D).
53. The method of claim 52, wherein the at least one operating
condition is an acceleration of the locate transmitter.
54. The method of claim 52, wherein the at least one operating
condition is a temperature of the locate transmitter.
55. The method of claim 52, wherein the at least one operating
condition is a frequency of the applied signal.
56. The method of claim 52, wherein the at least one operating
condition is a wattage of the applied signal.
57. The method of claim 52, wherein the at least one operating
condition is a quality of an electrical ground connection made by
the locate transmitter.
58. The method of claim 52, wherein the at least one operating
condition is a level of a battery of the locate transmitter.
59. The method of claim 52, wherein the at least one operating
condition is an inclination of the locate transmitter.
60. The method of claim 52, wherein the at least one operating
condition is a distance between the locate transmitter and a target
surface.
61. The method of claim 52, further comprising detecting a location
of the locate transmitter and logging information about the
location into local memory of the locate transmitter.
62. The method of claim 41, further comprising: D) comparing, using
the at least one processor, a value determined in B) to at least
one target value.
63. The method of claim 62, further comprising: E) disabling the
transmitter circuitry in response to the comparison in D).
64. The method of claim 62, wherein C) is performed in response to
the comparison in D).
65. The method of claim 62, further comprising: E) generating an
alert in response to the comparison in D).
66. The method of claim 65, wherein E) comprises generating an
audible alert.
67. The method of claim 65, wherein E) comprises generating a
visible alert.
68. The method of claim 67, wherein E) comprises generating a text
and/or graphics-based alert.
69. The method of claim 67, wherein E) comprises generating a
lighted alert.
70. The method of claim 65, wherein E) comprises generating a
tactile alert.
71. The method of claim 41, further comprising: D) detecting a
location of the locate transmitter using a location tracking
system; and E) logging into local memory of the locate transmitter
information about the location.
72. The method of claim 41, wherein the locate transmitter includes
a ground probe configured to establish an electrical ground
connection for the locate transmitter, and wherein the method
further comprises: D) detecting a location of the ground probe
using a location tracking system.
73. The method of claim 41, wherein the locate transmitter includes
a clamp configured to establish an electrical connection for the
locate transmitter to the underground facility, and wherein the
method further comprises: D) detecting a location of the clamp
using a location tracking system.
74. The method of claim 41, wherein the locate transmitter includes
a ground probe configured to establish an electrical ground
connection for the locate transmitter and a clamp configured to
establish an electrical connection for the locate transmitter to
the underground facility, and wherein the method further comprises:
D) detecting a location of the ground probe using a location
tracking system; and E) detecting a location of the clamp using a
location tracking system.
Description
CROSS-REFERENCES TO RELATED APPLICATIONS
[0001] This application claims the benefit, under 35 U.S.C.
.sctn.120, as a continuation (CON) of U.S. Non-provisional
application Ser. No. 12/704,087, entitled "Locate Apparatus Having
Enhanced Features for Underground Facility Locate Operations, and
Associated Methods and Systems," filed on Feb. 11, 2010, under
attorney docket no. D0687.70019US01.
[0002] Ser. No. 12/704,087 claims a priority benefit, under 35
U.S.C. .sctn.119(a), to Canadian application serial no. 2,692,115,
entitled "Locate Apparatus Having Enhanced Features for Underground
Facility Locate Operations, and Associated Methods and Systems,"
filed on Feb. 10, 2010, under attorney docket no. PAT
70830-1CA.
[0003] Ser. No. 12/704,087 claims a priority benefit, under 35
U.S.C. .sctn.119(e), to U.S. Provisional Application Ser. No.
61/151,578, entitled "Locating equipment that has enhanced features
for underground facility locate operations," filed on Feb. 11, 2009
under attorney docket number D0687.70019US00.
[0004] Ser. No. 12/704,087 also claims a priority benefit, under 35
U.S.C. .sctn.119(e), to U.S. Provisional Application Ser. No.
61/232,112, entitled "Methods and apparatus for detecting and
monitoring use of locating equipment for out-of-tolerance
conditions," filed on Aug. 7, 2009 under attorney docket number
D0687.70042US00.
[0005] Ser. No. 12/704,087 also claims a priority benefit, under 35
U.S.C. .sctn.120, as a continuation-in-part (CIP) of U.S.
Non-provisional application Ser. No. 12/571,329, entitled "Methods
and Apparatus for Generating Electronic Records of Locate
Operations," filed on Sep. 30, 2009 under attorney docket number
D0687.70054US00.
[0006] Ser. No. 12/571,329 in turn claims a priority benefit, under
35 U.S.C. .sctn.119(e), of U.S. Provisional Application Ser. No.
61/102,122, entitled "Combination Locate and Marking Device with a
Data Acquisition System Installed Therein, and Associated Methods,"
filed on Oct. 2, 2008 under attorney docket number
D0687.70010US00.
[0007] Each of the above-identified applications is incorporated by
reference herein in its entirety.
[0008] Ser. No. 12/704,087 also claims a priority benefit, under 35
U.S.C. .sctn.119(e), to U.S. Patent Application Ser. No.
61/235,519, entitled "Marking Device With Accelerometer and Local
Data Storage," filed Aug. 20, 2009 under Attorney Docket Number
D0687.70047US00.
BACKGROUND
[0009] Field service operations may be any operation in which
companies dispatch technicians and/or other staff to perform
certain activities, for example, installations, services and/or
repairs. Field service operations may exist in various industries,
examples of which include, but are not limited to, network
installations, utility installations, security systems,
construction, medical equipment, heating, ventilating and air
conditioning (HVAC) and the like.
[0010] An example of a field service operation in the construction
industry is a so-called "locate and marking operation," also
commonly referred to more simply as a "locate operation" (or
sometimes merely as "a locate"). In a typical locate operation, a
locate technician visits a work site in which there is a plan to
disturb the ground (e.g., excavate, dig one or more holes and/or
trenches, bore, etc.) so as to determine a presence or an absence
of one or more underground facilities (such as various types of
utility cables and pipes) in a dig area to be excavated or
disturbed at the work site. In some instances, a locate operation
may be requested for a "design" project, in which there may be no
immediate plan to excavate or otherwise disturb the ground, but
nonetheless information about a presence or absence of one or more
underground facilities at a work site may be valuable to inform a
planning, permitting and/or engineering design phase of a future
construction project.
[0011] In many states, an excavator who plans to disturb ground at
a work site is required by law to notify any potentially affected
underground facility owners prior to undertaking an excavation
activity. Advanced notice of excavation activities may be provided
by an excavator (or another party) by contacting a "one-call
center." One-call centers typically are operated by a consortium of
underground facility owners for the purposes of receiving
excavation notices and in turn notifying facility owners and/or
their agents of a plan to excavate. As part of an advanced
notification, excavators typically provide to the one-call center
various information relating to the planned activity, including a
location (e.g., address) of the work site and a description of the
dig area to be excavated or otherwise disturbed at the work
site.
[0012] FIG. 1 illustrates an example in which a locate operation is
initiated as a result of an excavator 1 providing an excavation
notice to a one-call center 2. An excavation notice also is
commonly referred to as a "locate request," and may be provided by
the excavator to the one-call center via an electronic mail
message, information entry via a website maintained by the one-call
center, or a telephone conversation between the excavator and a
technician at the one-call center. The locate request may include
an address or some other location-related information describing
the geographic location of a work site at which the excavation is
to be performed, as well as a description of the dig area (e.g., a
text description), such as its location relative to certain
landmarks and/or its approximate dimensions, within which there is
a plan to disturb the ground at the work site. One-call centers
similarly may receive locate requests for design projects (for
which, as discussed above, there may be no immediate plan to
excavate or otherwise disturb the ground).
[0013] Using the information provided in a locate request for
planned excavation or design projects, the one-call center
identifies certain underground facilities that may be present at
the indicated work site. For this purpose, many one-call centers
typically maintain a collection of "polygon maps" which indicate,
within a given geographic area over which the one-call center has
jurisdiction, generally where underground facilities may be found
relative to some geographic reference frame or coordinate
system.
[0014] Polygon maps typically are provided to the one-call centers
by underground facilities owners within the jurisdiction of the one
call center ("members" of the one-call center). A one-call center
first provides the facility owner/member with one or more maps
(e.g., street or property maps) within the jurisdiction, on which
are superimposed some type of grid or coordinate system employed by
the one-call center as a geographic frame of reference. Using the
maps provided by the one-call center, the respective facilities
owners/members draw one or more polygons on each map to indicate an
area within which their facilities generally are disposed
underground (without indicating the facilities themselves). These
polygons themselves do not precisely indicate geographic locations
of respective underground facilities; rather, the area enclosed by
a given polygon generally provides an over-inclusive indication of
where a given facilities owner's underground facilities are
disposed. Different facilities owners/members may draw polygons of
different sizes around areas including their underground
facilities, and in some instances such polygons can cover
appreciably large geographic regions (e.g., an entire subdivision
of a residential area), which may further obfuscate the
actual/precise location of respective underground facilities.
[0015] Based on the polygon maps collected from the facilities
owners/members, the one-call center may in some instances create
composite polygon maps to show polygons of multiple different
members on a single map. Whether using single member or composite
polygon maps, the one-call center examines the address or location
information provided in the locate request and identifies a
significant buffer zone around an identified work site so as to
make an over-inclusive identification of facilities owners/members
that may have underground facilities present (e.g., to err on the
side of caution). In particular, based on this generally
over-inclusive buffer zone around the identified work site (and in
some instances significantly over-inclusive buffer zone), the
one-call center consults the polygon maps to identify which member
polygons intersect with all or a portion of the buffer zone so as
to notify these underground facility owners/members and/or their
agents of the proposed excavation or design project. Again, it
should be appreciated that the buffer zones around an indicated
work site utilized by one-call centers for this purpose typically
embrace a geographic area that includes but goes well beyond the
actual work site, and in many cases the geographic area enclosed by
a buffer zone is significantly larger than the actual dig area in
which excavation or other similar activities are planned.
Similarly, as noted above, the area enclosed by a given member
polygon generally does not provide a precise indication of where
one or more underground facilities may in fact be found.
[0016] In some instances, one-call centers may also or
alternatively have access to various existing maps of underground
facilities in their jurisdiction, referred to as "facilities maps."
Facilities maps typically are maintained by facilities
owners/members within the jurisdiction and show, for respective
different utility types, where underground facilities purportedly
may be found relative to some geographic reference frame or
coordinate system (e.g., a grid, a street or property map, GPS
latitude and longitude coordinates, etc.). Facilities maps
generally provide somewhat more detail than polygon maps provided
by facilities owners/members; however, in some instances the
information contained in facilities maps may not be accurate and/or
complete. For at least this reason, whether using polygon maps or
facilities maps, as noted above the one-call center utilizes a
significant buffer zone around an identified work site so as to
make an over-inclusive identification of facilities owners/members
that may have underground facilities present.
[0017] Once facilities implicated by the locate request are
identified by a one-call center (e.g., via the polygon map/buffer
zone process), the one-call center generates a "locate request
ticket" (also known as a "locate ticket," or simply a "ticket").
The locate request ticket essentially constitutes an instruction to
inspect a work site and typically identifies the work site of the
proposed excavation or design and a description of the dig area,
typically lists on the ticket all of the underground facilities
that may be present at the work site (e.g., by providing a member
code for the facility owner whose polygon falls within a given
buffer zone), and may also include various other information
relevant to the proposed excavation or design (e.g., the name of
the excavation company, a name of a property owner or party
contracting the excavation company to perform the excavation,
etc.). The one-call center sends the ticket to one or more
underground facility owners 4 and/or one or more locate service
providers 3 (who may be acting as contracted agents of the facility
owners) so that they can conduct a locate and marking operation to
verify a presence or absence of the underground facilities in the
dig area. For example, in some instances, a given underground
facility owner 4 may operate its own fleet of locate technicians
(e.g., locate technician 6), in which case the one-call center 2
may send the ticket to the underground facility owner 4. In other
instances, a given facility owner may contract with a locate
service provider to receive locate request tickets and perform a
locate and marking operation in response to received tickets on
their behalf.
[0018] Upon receiving the locate request, a locate service provider
or a facility owner (hereafter referred to as a "ticket recipient")
may dispatch a locate technician 5 to the work site of planned
excavation to determine a presence or absence of one or more
underground facilities in the dig area to be excavated or otherwise
disturbed. A typical first step for the locate technician 5
includes utilizing an underground facility "locate device," which
is an instrument or set of instruments (also referred to commonly
as a "locate set") for detecting facilities that are concealed in
some manner, such as cables and pipes that are located underground.
The locate device is employed by the technician to verify the
presence or absence of underground facilities indicated in the
locate request ticket as potentially present in the dig area (e.g.,
via the facility owner member codes listed in the ticket). This
process is often referred to as a "locate operation."
[0019] In one example of a locate operation, an underground
facility locate device is used to detect electromagnetic fields
that are generated by an applied signal provided along a length of
a target facility to be identified. In this example, a locate
device may include both a signal transmitter to provide the applied
signal (e.g., which is coupled by the locate technician to a tracer
wire disposed along a length of a facility), and a signal receiver
which is generally a hand-held apparatus carried by the locate
technician as the technician walks around the dig area to search
for underground facilities. FIG. 2 illustrates a conventional
locate device 20 (indicated by the dashed box) that includes a
transmitter 22 and a locate receiver 24. The transmitter 22 is
connected, via a connection point 26, to a target object (in this
example, underground facility 28) located in the ground 21. The
transmitter generates the applied signal 23, which is coupled to
the underground facility via the connection point (e.g., to a
tracer wire along the facility), resulting in the generation of a
magnetic field 25. The magnetic field in turn is detected by the
locate receiver 24, which itself may include one or more detection
antenna (not shown). The locate receiver 24 indicates a presence of
a facility when it detects electromagnetic fields arising from the
applied signal 23. Conversely, the absence of a signal detected by
the locate receiver generally indicates the absence of the target
facility.
[0020] In yet another example, a locate device employed for a
locate operation may include a single instrument, similar in some
respects to a conventional metal detector. In particular, such an
instrument may include an oscillator to generate an alternating
current that passes through a coil, which in turn produces a first
magnetic field. If a piece of electrically conductive metal is in
close proximity to the coil (e.g., if an underground facility
having a metal component is below/near the coil of the instrument),
eddy currents are induced in the metal and the metal produces its
own magnetic field, which in turn affects the first magnetic field.
The instrument may include a second coil to measure changes to the
first magnetic field, thereby facilitating detection of metallic
objects.
[0021] In addition to the locate operation, the locate technician
also generally performs a "marking operation," in which the
technician marks the presence (and in some cases the absence) of a
given underground facility in the dig area based on the various
signals detected (or not detected) during the locate operation. For
this purpose, the locate technician conventionally utilizes a
"marking device" to dispense a marking material on, for example,
the ground, pavement, or other surface along a detected underground
facility. Marking material may be any material, substance,
compound, and/or element, used or which may be used separately or
in combination to mark, signify, and/or indicate. Examples of
marking materials may include, but are not limited to, paint,
chalk, dye, and/or iron. Marking devices, such as paint marking
wands and/or paint marking wheels, provide a convenient method of
dispensing marking materials onto surfaces, such as onto the
surface of the ground or pavement.
[0022] FIGS. 3A and 3B illustrate a conventional marking device 50
with a mechanical actuation system to dispense paint as a marker.
Generally speaking, the marking device 50 includes a handle 38 at a
proximal end of an elongated shaft 36 and resembles a sort of
"walking stick," such that a technician may operate the marking
device while standing/walking in an upright or substantially
upright position. A marking dispenser holder 40 is coupled to a
distal end of the shaft 36 so as to contain and support a marking
dispenser 56, e.g., an aerosol paint can having a spray nozzle 54.
Typically, a marking dispenser in the form of an aerosol paint can
is placed into the holder 40 upside down, such that the spray
nozzle 54 is proximate to the distal end of the shaft (close to the
ground, pavement or other surface on which markers are to be
dispensed).
[0023] In FIGS. 3A and 3B, the mechanical actuation system of the
marking device 50 includes an actuator or mechanical trigger 42
proximate to the handle 38 that is actuated/triggered by the
technician (e.g., via pulling, depressing or squeezing with
fingers/hand). The actuator 42 is connected to a mechanical coupler
52 (e.g., a rod) disposed inside and along a length of the
elongated shaft 36. The coupler 52 is in turn connected to an
actuation mechanism 58, at the distal end of the shaft 36, which
mechanism extends outward from the shaft in the direction of the
spray nozzle 54. Thus, the actuator 42, the mechanical coupler 52,
and the actuation mechanism 58 constitute the mechanical actuation
system of the marking device 50.
[0024] FIG. 3A shows the mechanical actuation system of the
conventional marking device 50 in the non-actuated state, wherein
the actuator 42 is "at rest" (not being pulled) and, as a result,
the actuation mechanism 58 is not in contact with the spray nozzle
54. FIG. 3B shows the marking device 50 in the actuated state,
wherein the actuator 42 is being actuated (pulled, depressed,
squeezed) by the technician. When actuated, the actuator 42
displaces the mechanical coupler 52 and the actuation mechanism 58
such that the actuation mechanism contacts and applies pressure to
the spray nozzle 54, thus causing the spray nozzle to deflect
slightly and dispense paint. The mechanical actuation system is
spring-loaded so that it automatically returns to the non-actuated
state (FIG. 3A) when the actuator 42 is released.
[0025] In some environments, arrows, flags, darts, or other types
of physical marks may be used to mark the presence or absence of an
underground facility in a dig area, in addition to or as an
alternative to a material applied to the ground (such as paint,
chalk, dye, tape) along the path of a detected utility. The marks
resulting from any of a wide variety of materials and/or objects
used to indicate a presence or absence of underground facilities
generally are referred to as "locate marks." Often, different color
materials and/or physical objects may be used for locate marks,
wherein different colors correspond to different utility types. For
example, the American Public Works Association (APWA) has
established a standardized color-coding system for utility
identification for use by public agencies, utilities, contractors
and various groups involved in ground excavation (e.g.,
red=electric power lines and cables; blue=potable water;
orange=telecommunication lines; yellow=gas, oil, steam). In some
cases, the technician also may provide one or more marks to
indicate that no facility was found in the dig area (sometimes
referred to as a "clear").
[0026] As mentioned above, the foregoing activity of identifying
and marking a presence or absence of one or more underground
facilities generally is referred to for completeness as a "locate
and marking operation." However, in light of common parlance
adopted in the construction industry, and/or for the sake of
brevity, one or both of the respective locate and marking functions
may be referred to in some instances simply as a "locate operation"
or a "locate" (i.e., without making any specific reference to the
marking function). Accordingly, it should be appreciated that any
reference in the relevant arts to the task of a locate technician
simply as a "locate operation" or a "locate" does not necessarily
exclude the marking portion of the overall process. At the same
time, in some contexts a locate operation is identified separately
from a marking operation, wherein the former relates more
specifically to detection-related activities and the latter relates
more specifically to marking-related activities.
[0027] Inaccurate locating and/or marking of underground facilities
can result in physical damage to the facilities, property damage,
and/or personal injury during the excavation process that, in turn,
can expose a facility owner or contractor to significant legal
liability. When underground facilities are damaged and/or when
property damage or personal injury results from damaging an
underground facility during an excavation, the excavator may assert
that the facility was not accurately located and/or marked by a
locate technician, while the locate contractor who dispatched the
technician may in turn assert that the facility was indeed properly
located and marked. Proving whether the underground facility was
properly located and marked can be difficult after the excavation
(or after some damage, e.g., a gas explosion), because in many
cases the physical locate marks (e.g., the marking material or
other physical marks used to mark the facility on the surface of
the dig area) will have been disturbed or destroyed during the
excavation process (and/or damage resulting from excavation).
[0028] Previous efforts at documenting locate operations have
focused primarily on locate devices that employ electromagnetic
fields to determine the presence of an underground facility. For
example, U.S. Pat. No. 5,576,973, naming inventor Alan Haddy and
entitled "Apparatus and Method for Obtaining Geographical
Positional Data for an Object Located Underground" (hereafter
"Haddy"), is directed to a locate device (i.e., a "locator") that
receives and stores data from a global positioning system ("GPS")
to identify the position of the locate device as an underground
object (e.g., a cable) is detected by the locate device. Haddy
notes that by recording geographical position data relating to the
detected underground object, there is no need to physically mark
the location of the underground object on the ground surface, and
the recorded position data may be used in the future to re-locate
the underground object.
[0029] Similarly, U.S. Pat. No. 7,319,387, naming inventors Willson
et al. and entitled "GPS Interface for Locating Device" (hereafter
"Willson"), is directed to a locate device for locating "position
markers," i.e., passive antennas that reflect back RF signals and
which are installed along buried utilities. In Willson, a GPS
device may be communicatively coupled to the locate device, or
alternatively provided as an integral part of the locate device, to
store GPS coordinate data associated with position markers detected
by the locate device. Electronic memory is provided in the locate
device for storing a data record of the GPS coordinate data, and
the data record may be uploaded to a remote computer and used to
update a mapping database for utilities.
[0030] U.S. Publication No. 2006/0282280, naming inventors Stotz et
al. and entitled "Ticket and Data Management" (hereafter "Stotz"),
also is directed to a locate device (i.e., a "locator") including a
GPS receiver. Upon detection of the presence of a utility line,
Stotz' locate device can update ticket data with GPS coordinates
for the detected utility line. Once the locate device has updated
the ticket data, the reconfigured ticket data may be transmitted to
a network.
[0031] U.S. Publication No. 2007/0219722, naming inventors Sawyer,
Jr. et al. and entitled "System and Method for Collecting and
Updating Geographical Data" (hereafter "Sawyer"), is directed to
collecting and recording data representative of the location and
characteristics of utilities and infrastructure in the field for
creating a grid or map. Sawyer employs a field data collection unit
including a "locating pole" that is placed on top of or next to a
utility to be identified and added to the grid or map. The locating
pole includes an antenna coupled to a location determination
system, such as a GPS unit, to provide longitudinal and latitudinal
coordinates of the utility under or next to the end of the locating
pole. The data gathered by the field data collection unit is sent
to a server to provide a permanent record that may be used for
damage prevention and asset management operations.
SUMMARY
[0032] Applicants have recognized and appreciated that
uncertainties which may be attendant to locate and marking
operations may be significantly reduced by collecting comprehensive
information relating to one or both of the operating conditions of
equipment used to perform the locate and/or marking operations, as
well as various environmental conditions present at or near the
work site and/or in close proximity to the equipment being
used.
[0033] More specifically, Applicants have recognized and
appreciated that conventional techniques for using a locate device
to detect underground facilities are sometimes tentative and
typically iterative in nature, and use of locate devices with only
rudimentary GPS capabilities in some instances may result in
redundant, spurious and/or incomplete geographic location data
collected by such devices. For example, during a typical locate
operation, a technician attempting to locate an underground
facility with a locate device often needs to sweep an appreciable
area around a suspected underground facility, and make multiple
passes with the locate device over the underground facility to
obtain meaningful detection signals. Furthermore, the technician
often needs to rely significantly on visual observations of the
area, including relevant landmarks such as facility connections to
buildings, transformer boxes, maintenance/public access points,
curbs, sidewalks, roadways, etc., to effectively deduce a sensible
path of an underground facility to be located. The foregoing is
particularly true if at some point during the locate operation the
technician loses a signal from an underground facility in the
process of being detected (e.g., due to a broken transmitter
circuit path from a damaged tracer wire, and loss of the
transmitter test signal). Thus, collecting and logging geographic
location information throughout this process may result in
excessive and/or imprecise data, or in some instances incomplete
relevant data (e.g., in the case of signal loss/broken tracer
wire), from which it may be difficult to cull the data that is
truly complete and representative of where the underground facility
ultimately was detected. Accordingly, additional information about
other operating conditions of the locate device, and/or information
on existing environmental conditions, may in some instances
supplement, or facilitate identification of, information that is
perhaps the most relevant to the operation at hand.
[0034] In view of the foregoing, various embodiments of the present
invention are directed to locate devices (e.g., locate transmitters
and/or locate receivers) with enhanced features, and associated
methods and systems, to facilitate collection of a wide variety of
information relating to a locate operation, and provide for
creation of a comprehensive and robust electronic record of a
locate operation. Locate information relating to use of a locate
device to perform a locate operation may be acquired from one or
more of a variety of input devices in any of a variety of manners,
logged/stored in local memory of a locate device, formatted in
various manners, processed and/or analyzed at the locate device
itself, and/or transmitted to another device (e.g., a remote
computer/server) for storage, processing and/or analysis.
[0035] In some exemplary embodiments described in detail herein, a
locate device may include one or more environmental sensors and/or
operational sensors, and the locate information may include
environmental information and operational information derived from
such sensors. Environmental and/or operational information may be
used to control operation of the locate device, assess
out-of-tolerance conditions in connection with use of the locate
device, and/or provide alerts or other feedback. In yet other
embodiments, additional enhancements are disclosed relating to
improving the determination of a location (e.g., GPS coordinates)
of a detecting tip of the locate device (e.g., a portion of the
locate device close to the ground, pavement or other surface below
which one or more underground facilities may be disposed) during
use.
[0036] In other embodiments, a locate device may be operated in a
"solo" mode or a "group" mode. In particular, in a "solo" mode, the
locate device may be operated as an individual, independent device
to collect, store and/or transmit data, whereas in "group" mode, a
locate device may act as a "worker" device or a "leader" device to
facilitate consolidation of data collected by multiple devices
(e.g., and relating to a same ticket) at a single one of the
devices, at a host server, or at any other suitable location.
[0037] In yet other embodiments, a locate device may be equipped
with an enhanced user interface having tactile functionality; in
particular, the locate device may include one or more tactile
indicators (e.g., vibrating devices) disposed, for example, in a
handle, joy stick, actuator or elsewhere on the device, to provide
a tactile indication to a technician using the locate device (e.g.,
as feedback in connection with an operating mode, operating
condition, environmental condition, etc.).
[0038] During and/or following collection and/or storage of
information regarding the locate operation, data compiled in one or
more electronic records associated with the locate operation may be
accessed, processed and/or analyzed to provide further information
relating to the performance of the locate operation. For example,
in other embodiments disclosed herein, data from one or more
electronic records of the locate operation is processed so as to
electronically render (visually recreate) the locate operation
(e.g., on a display device associated with the locate device or
other display device). Electronic renderings may be generated
statically (e.g., in which all available data in an electronic
record is rendered essentially simultaneously on an available
display field) or in an "animated" time-sequenced recreation of the
locate operation (e.g., based on at least timing and geographic
location information in the electronic record) once an electronic
record is generated. In yet another exemplary implementation,
various information to be logged in an electronic record may be
passed/transmitted in essentially real-time to one or more display
devices to facilitate an essentially real-time electronic rendering
on an available display field of a locate operation in process.
[0039] One embodiment of the present invention is directed to an
apparatus for detecting a presence or absence of an underground
facility. The apparatus comprises at least one receiver antenna
configured to detect a magnetic field from the underground
facility, at least one processor communicatively coupled to the at
least one receiver antenna to receive information about the
magnetic field from the at least one receiver antenna, and at least
one input device communicatively coupled to the at least one
processor and configured to sense at least one environmental
condition of an environment in which the apparatus is located. The
at least one input device is configured to provide an output signal
to the at least one processor indicative of the sensed at least one
environmental condition.
[0040] Another embodiment of the present invention is directed to
an apparatus for detecting a presence or absence of an underground
facility. The apparatus comprises at least one receiver antenna
configured to detect a magnetic field from the underground
facility, an actuator, and at least one processor communicatively
coupled to the at least one receiver antenna to receive information
about the magnetic field from the at least one receiver antenna in
response to actuation of the actuator. The apparatus further
comprises a location tracking system communicatively coupled to the
at least one processor and configured to determine a location of
the apparatus, and at least one input device communicatively
coupled to the at least one processor and configured to sense at
least one environmental condition of an environment in which the
apparatus is located. The at least one input device is configured
to provide an output signal to the at least one processor
indicative of the sensed at least one environmental condition. The
at least one processor is programmed with processor-executable
instructions which, when executed, cause the at least one processor
to compare the output signal of the at least one input device to at
least one target range. In response to determining that the output
signal is outside the at least one target range, the at least one
processor does at least one of (i) generate an alert to a
technician using the apparatus and (ii) disable the actuator.
[0041] Another embodiment of the present invention is directed to a
method for performing a locate operation for at least one
underground facility using a locate apparatus. The method comprises
A) detecting, via at least one receiver antenna of the apparatus, a
magnetic field from the at least one underground facility. The
method further comprises B) detecting, via at least one input
device of the apparatus, at least one environmental condition of an
environment in which the apparatus is located. The method further
comprises C) logging into local memory of the apparatus locate
information relating at least in part to A) and B).
[0042] Another embodiment of the present invention is directed to
an apparatus for detecting a presence or absence of an underground
facility, the apparatus comprising at least one receiver antenna
configured to detect a magnetic field from the underground
facility, and at least one processor communicatively coupled to the
at least one receiver antenna to receive information about the
magnetic field from the at least one receiver antenna. The
apparatus further comprises at least one actuator communicatively
coupled to the at least one processor and the at least one receiver
antenna and configured to cause the at least one processor to log
the information about the magnetic field into local memory upon
actuation of the at least one actuator. The apparatus further
comprises an input device communicatively coupled to the at least
one processor to provide an input signal to the at least one
processor. The at least one processor is programmed with
processor-executable instructions which, when executed, cause the
at least one processor to compare the input signal to a target
value or range of values to assess whether an out-of-tolerance
condition is indicated by the input signal. If an out-of-tolerance
condition is indicated by the input signal, the at least one
processor does at least one of: (a) log an out-of-tolerance
indication into an electronic record; (b) generate an alert to a
user of the apparatus that an out-of-tolerance condition has been
detected; and (c) disable the at least one actuator.
[0043] Another embodiment of the present invention is directed to a
method of using a locate receiver for performing a locate operation
for detecting a presence or absence of at least one underground
facility. The method comprises A) acquiring, using an environmental
sensor or operational sensor of the locate receiver, information
comprising: (i) environmental information representative of at
least one environmental condition of an environment in which the
locate receiver is located; and/or (ii) operational information
representative of at least one operating condition of the locate
receiver. The method further comprises B) detecting a magnetic
field from the at least one underground facility using at least one
receiver antenna of the locate receiver. The method further
comprises C) controlling B) based at least in part on the
environmental information and/or operational information acquired
in A).
[0044] Another embodiment of the present invention is directed to a
method for using operational data collected as part of a locate
operation to detect the presence or absence of an underground
facility. The method comprises receiving the operational data
representative of an operating condition of a locate receiver used
to perform the locate operation, and analyzing the operational data
for an operating pattern of a technician using the locate
receiver.
[0045] Another embodiment of the present invention is directed to
at least one computer-readable storage medium storing an electronic
record associated with a locate operation. The electronic record
comprises at least one data set representing a technician signature
with respect to a technician's operation of a locate receiver for
performing the locate operation.
[0046] Another embodiment of the present invention is directed to a
locate transmitter for use in a locate operation to detect the
presence or absence of an underground facility. The locate
transmitter comprises transmitter circuitry configured to generate
an applied signal to be applied along the underground facility, at
least one processor communicatively coupled to the transmitter
circuitry, and at least one input device communicatively coupled to
the at least one processor and configured to sense at least one
environmental condition of an environment in which the locate
transmitter is located. The at least one input device is configured
to provide an output signal to the at least one processor
indicative of the sensed at least one environmental condition.
[0047] Another embodiment of the present invention is directed to a
method of using a locate transmitter in a locate operation to
detect a presence or absence of an underground facility. The method
comprises A) generating an applied signal to be applied along the
underground facility. The method further comprises B) detecting,
via at least one input device of the locate transmitter, at least
one environmental condition of an environment in which the locate
transmitter is located. The method further comprises C) logging
into local memory of the locate transmitter locate information
relating at least in part to A) and B).
[0048] Another embodiment of the present invention is directed to a
locate transmitter for use in a locate operation to detect a
presence or absence of an underground facility, comprising
transmitter circuitry configured to generate an applied signal to
be applied along the underground facility, and at least one
processor communicatively coupled to the transmitter circuitry. The
locate transmitter further comprises at least one input device
communicatively coupled to the at least one processor and
configured to sense at least one operating condition of the locate
transmitter. The at least one input device is configured to provide
an output signal to the at least one processor indicative of the
sensed at least one operating condition.
[0049] Another embodiment of the present invention is directed to a
method of using a locate transmitter in a locate operation to
detect a presence or absence of an underground facility, the method
comprising A) generating an applied signal to be applied along the
underground facility. The method further comprises B) detecting,
via at least one input device of the locate transmitter, at least
one operating condition of the locate transmitter. The method
further comprises C) logging into local memory of the locate
transmitter locate information relating at least in part to A) and
B).
[0050] Another embodiment of the present invention is directed to a
locate transmitter for generating an applied signal for use in a
locate operation for detecting a presence or absence of an
underground facility. The locate transmitter comprises transmitter
circuitry configured to generate an applied signal to be applied
along the underground facility, at least one processor
communicatively coupled to the transmitter circuitry, and an input
device communicatively coupled to the at least one processor to
provide an input signal to the at least one processor. The at least
one processor is programmed with processor-executable instructions
which, when executed, cause the at least one processor to compare
the input signal to a target value or range of values to assess
whether an out-of-tolerance condition is indicated by the input
signal. If an out-of-tolerance condition is indicated by the input
signal, the at least one processor does at least one of: (a) log an
out-of-tolerance indication into an electronic record; (b) generate
an alert to a user of the locate transmitter that an
out-of-tolerance condition has been detected; and (c) disable the
transmitter circuitry.
[0051] Another embodiment of the present invention is directed to a
method of using a locate transmitter for performing a locate
operation for detecting a presence or absence of at least one
underground facility. The method comprises A) generating an applied
signal, and B) providing the applied signal to the at least one
underground facility. The method further comprises C) acquiring,
using an environmental sensor or operational sensor of the locate
transmitter, information comprising: (i) environmental information
representative of at least one environmental condition of an
environment in which the locate transmitter is located; and/or (ii)
operational information representative of at least one operating
condition of the locate transmitter. The method further comprises
D) controlling A) based at least in part on the environmental
information and/or operational information acquired in C).
[0052] Another embodiment of the present invention is directed to
an apparatus for detecting a presence or absence of an underground
facility. The apparatus comprises at least one receiver antenna
configured to detect a magnetic field from the underground
facility, a memory to store processor-executable instructions, at
least one communication interface, and at least one processor
communicatively coupled to the at least one receiver antenna, the
memory, and the at least one communication interface. Upon
execution of the processor-executable instructions, the at least
one processor controls the at least one communication interface to
receive environmental information regarding at least one
environmental condition of an environment in which the apparatus is
located, and stores at least some of the received environmental
information in the memory.
[0053] Another embodiment of the present invention is directed to a
locate apparatus for performing a locate operation to detect a
presence or an absence of at least one underground facility. The
apparatus comprises at least one receiver antenna to detect a
magnetic field from at least one underground facility when present.
The apparatus further comprises at least one input device to
provide environmental information regarding the locate operation.
The at least one input device is configured to sense at least one
environmental condition of an environment in which the apparatus is
located and provide an output signal indicative of the sensed at
least one environmental condition. The apparatus further comprises
at least one processor communicatively coupled to the at least one
receiver antenna and the at least one input device so as to receive
the output signal. In one implementation, the apparatus further
comprises a memory to store processor-executable instructions. In
one aspect of this implementation, upon execution of the
processor-executable instructions, the processor logs into the
memory at least some of the environmental information. In another
aspect, the apparatus includes an actuator, and the processor logs
into the memory the at least some of the environmental information
based at least in part on at least one actuation of the
actuator.
[0054] For purposes of the present disclosure, the term "dig area"
refers to a specified area of a work site within which there is a
plan to disturb the ground (e.g., excavate, dig holes and/or
trenches, bore, etc.), and beyond which there is no plan to
excavate in the immediate surroundings. Thus, the metes and bounds
of a dig area are intended to provide specificity as to where some
disturbance to the ground is planned at a given work site. It
should be appreciated that a given work site may include multiple
dig areas.
[0055] The term "facility" refers to one or more lines, cables,
fibers, conduits, transmitters, receivers, or other physical
objects or structures capable of or used for carrying,
transmitting, receiving, storing, and providing utilities, energy,
data, substances, and/or services, and/or any combination thereof.
The term "underground facility" means any facility beneath the
surface of the ground. Examples of facilities include, but are not
limited to, oil, gas, water, sewer, power, telephone, data
transmission, cable television (TV), and/or internet services.
[0056] The term "locate device" includes one or both of a locate
transmitter and a locate receiver (which in some instances may also
be referred to collectively as a "locate instrument set," or simply
"locate set").
[0057] The term "marking device" refers to any apparatus,
mechanism, or other device that employs a marking dispenser for
causing a marking material and/or marking object to be dispensed,
or any apparatus, mechanism, or other device for electronically
indicating (e.g., logging in memory) a location, such as a location
of an underground facility. Additionally, the term "marking
dispenser" refers to any apparatus, mechanism, or other device for
dispensing and/or otherwise using, separately or in combination, a
marking material and/or a marking object. An example of a marking
dispenser may include, but is not limited to, a pressurized can of
marking paint. The term "marking material" means any material,
substance, compound, and/or element, used or which may be used
separately or in combination to mark, signify, and/or indicate.
Examples of marking materials may include, but are not limited to,
paint, chalk, dye, and/or iron. The term "marking object" means any
object and/or objects used or which may be used separately or in
combination to mark, signify, and/or indicate. Examples of marking
objects may include, but are not limited to, a flag, a dart, and
arrow, and/or an RFID marking ball. It is contemplated that marking
material may include marking objects. It is further contemplated
that the terms "marking materials" or "marking objects" may be used
interchangeably in accordance with the present disclosure.
[0058] The term "locate mark" means any mark, sign, and/or object
employed to indicate the presence or absence of any underground
facility. Examples of locate marks may include, but are not limited
to, marks made with marking materials, marking objects, global
positioning or other information, and/or any other means. Locate
marks may be represented in any form including, without limitation,
physical, visible, electronic, and/or any combination thereof.
[0059] The terms "actuate" or "trigger" (verb form) are used
interchangeably to refer to starting or causing any device,
program, system, and/or any combination thereof to work, operate,
and/or function in response to some type of signal or stimulus.
Examples of actuation signals or stimuli may include, but are not
limited to, any local or remote, physical, audible, inaudible,
visual, non-visual, electronic, mechanical, electromechanical,
biomechanical, biosensing or other signal, instruction, or event.
The terms "actuator" or "trigger" (noun form) are used
interchangeably to refer to any method or device used to generate
one or more signals or stimuli to cause or causing actuation.
Examples of an actuator/trigger may include, but are not limited
to, any form or combination of a lever, switch, program, processor,
screen, microphone for capturing audible commands, and/or other
device or method. An actuator/trigger may also include, but is not
limited to, a device, software, or program that responds to any
movement and/or condition of a user, such as, but not limited to,
eye movement, brain activity, heart rate, other data, and/or the
like, and generates one or more signals or stimuli in response
thereto. In the case of a marking device or other marking mechanism
(e.g., to physically or electronically mark a facility or other
feature), actuation may cause marking material to be dispensed, as
well as various data relating to the marking operation (e.g.,
geographic location, time stamps, characteristics of material
dispensed, etc.) to be logged in an electronic file stored in
memory. In the case of a locate device or other locate mechanism
(e.g., to physically locate a facility or other feature), actuation
may cause a detected signal strength, signal frequency, depth, or
other information relating to the locate operation to be logged in
an electronic file stored in memory.
[0060] The terms "locate and marking operation," "locate
operation," and "locate" generally are used interchangeably and
refer to any activity to detect, infer, and/or mark the presence or
absence of an underground facility. In some contexts, the term
"locate operation" is used to more specifically refer to detection
of one or more underground facilities, and the term "marking
operation" is used to more specifically refer to using a marking
material and/or one or more marking objects to mark a presence or
an absence of one or more underground facilities. The term "locate
technician" refers to an individual performing a locate operation.
A locate and marking operation often is specified in connection
with a dig area, at least a portion of which may be excavated or
otherwise disturbed during excavation activities.
[0061] The term "user" refers to an individual utilizing a locate
device and/or a marking device and may include, but is not limited
to, land surveyors, locate technicians, and support personnel.
[0062] The terms "locate request" and "excavation notice" are used
interchangeably to refer to any communication to request a locate
and marking operation. The term "locate request ticket" (or simply
"ticket") refers to any communication or instruction to perform a
locate operation. A ticket might specify, for example, the address
or description of a dig area to be marked, the day and/or time that
the dig area is to be marked, and/or whether the user is to mark
the excavation area for certain gas, water, sewer, power,
telephone, cable television, and/or some other underground
facility. The term "historical ticket" refers to past tickets that
have been completed.
[0063] The following U.S. published applications and patents are
hereby incorporated herein by reference:
[0064] U.S. Pat. No. 7,640,105, issued Dec. 29, 2009, filed Mar.
13, 2007, and entitled "Marking System and Method With Location
and/or Time Tracking;"
[0065] U.S. publication no. 2008-0245299-A1, published Oct. 9,
2008, filed Apr. 4, 2007, and entitled "Marking System and
Method;"
[0066] U.S. publication no. 2009-0013928-A1, published Jan. 15,
2009, filed Sep. 24, 2008, and entitled "Marking System and
Method;"
[0067] U.S. publication no. 2009-0238414-A1, published Sep. 24,
2009, filed Mar. 18, 2008, and entitled "Virtual White Lines for
Delimiting Planned Excavation Sites;"
[0068] U.S. publication no. 2009-0241045-A1, published Sep. 24,
2009, filed Sep. 26, 2008, and entitled "Virtual White Lines for
Delimiting Planned Excavation Sites;"
[0069] U.S. publication no. 2009-0238415-A1, published Sep. 24,
2009, filed Sep. 26, 2008, and entitled "Virtual White Lines for
Delimiting Planned Excavation Sites;"
[0070] U.S. publication no. 2009-0241046-A1, published Sep. 24,
2009, filed Jan. 16, 2009, and entitled "Virtual White Lines for
Delimiting Planned Excavation Sites;"
[0071] U.S. publication no. 2009-0238416-A1, published Sep. 24,
2009, filed Jan. 16, 2009, and entitled "Virtual White Lines for
Delimiting Planned Excavation Sites;"
[0072] U.S. publication no. 2009-0237408-A1, published Sep. 24,
2009, filed Jan. 16, 2009, and entitled "Virtual White Lines for
Delimiting Planned Excavation Sites;"
[0073] U.S. publication no. 2009-0202101-A1, published Aug. 13,
2009, filed Feb. 12, 2008, and entitled "Electronic Manifest of
Underground Facility Locate Marks;"
[0074] U.S. publication no. 2009-0202110-A1, published Aug. 13,
2009, filed Sep. 11, 2008, and entitled "Electronic Manifest of
Underground Facility Locate Marks;"
[0075] U.S. publication no. 2009-0201311-A1, published Aug. 13,
2009, filed Jan. 30, 2009, and entitled "Electronic Manifest of
Underground Facility Locate Marks;"
[0076] U.S. publication no. 2009-0202111-A1, published Aug. 13,
2009, filed Jan. 30, 2009, and entitled "Electronic Manifest of
Underground Facility Locate Marks;"
[0077] U.S. publication no. 2009-0204625-A1, published Aug. 13,
2009, filed Feb. 5, 2009, and entitled "Electronic Manifest of
Underground Facility Locate Operation;"
[0078] U.S. publication no. 2009-0204466-A1, published Aug. 13,
2009, filed Sep. 4, 2008, and entitled "Ticket Approval System For
and Method of Performing Quality Control In Field Service
Applications;"
[0079] U.S. publication no. 2009-0207019-A1, published Aug. 20,
2009, filed Apr. 30, 2009, and entitled "Ticket Approval System For
and Method of Performing Quality Control In Field Service
Applications;"
[0080] U.S. publication no. 2009-0210284-A1, published Aug. 20,
2009, filed Apr. 30, 2009, and entitled "Ticket Approval System For
and Method of Performing Quality Control In Field Service
Applications;"
[0081] U.S. publication no. 2009-0210297-A1, published Aug. 20,
2009, filed Apr. 30, 2009, and entitled "Ticket Approval System For
and Method of Performing Quality Control In Field Service
Applications;"
[0082] U.S. publication no. 2009-0210298-A1, published Aug. 20,
2009, filed Apr. 30, 2009, and entitled "Ticket Approval System For
and Method of Performing Quality Control In Field Service
Applications;"
[0083] U.S. publication no. 2009-0210285-A1, published Aug. 20,
2009, filed Apr. 30, 2009, and entitled "Ticket Approval System For
and Method of Performing Quality Control In Field Service
Applications;"
[0084] U.S. publication no. 2009-0324815-A1, published Dec. 31,
2009, filed Apr. 24, 2009, and entitled "Marking Apparatus and
Marking Methods Using Marking Dispenser with Machine-Readable ID
Mechanism;"
[0085] U.S. publication no. 2010-0006667-A1, published Jan. 14,
2010, filed Apr. 24, 2009, and entitled, "Marker Detection
Mechanisms for use in Marking Devices And Methods of Using
Same;"
[0086] U.S. publication no. 2009-0204238-A1, published Aug. 13,
2009, filed Feb. 2, 2009, and entitled "Electronically Controlled
Marking Apparatus and Methods;"
[0087] U.S. publication no. 2009-0208642-A1, published Aug. 20,
2009, filed Feb. 2, 2009, and entitled "Marking Apparatus and
Methods For Creating an Electronic Record of Marking
Operations;"
[0088] U.S. publication no. 2009-0210098-A1, published Aug. 20,
2009, filed Feb. 2, 2009, and entitled "Marking Apparatus and
Methods For Creating an Electronic Record of Marking Apparatus
Operations;"
[0089] U.S. publication no. 2009-0201178-A1, published Aug. 13,
2009, filed Feb. 2, 2009, and entitled "Methods For Evaluating
Operation of Marking Apparatus;"
[0090] U.S. publication no. 2009-0238417-A1, published Sep. 24,
2009, filed Feb. 6, 2009, and entitled "Virtual White Lines for
Indicating Planned Excavation Sites on Electronic Images;"
[0091] U.S. publication no. 2009-0202112-A1, published Aug. 13,
2009, filed Feb. 11, 2009, and entitled "Searchable Electronic
Records of Underground Facility Locate Marking Operations;"
[0092] U.S. publication no. 2009-0204614-A1, published Aug. 13,
2009, filed Feb. 11, 2009, and entitled "Searchable Electronic
Records of Underground Facility Locate Marking Operations;"
[0093] U.S. publication no. 2009-0327024-A1, published Dec. 31,
2009, filed Jun. 26, 2009, and entitled "Methods and Apparatus for
Quality Assessment of a Field Service Operation;"
[0094] U.S. publication no. 2010-0010862-A1, published Jan. 14,
2010, filed Aug. 7, 2009, and entitled, "Methods and Apparatus for
Quality Assessment of a Field Service Operation Based on Geographic
Information;"
[0095] U.S. publication No. 2010-0010863-A1, published Jan. 14,
2010, filed Aug. 7, 2009, and entitled, "Methods and Apparatus for
Quality Assessment of a Field Service Operation Based on Multiple
Scoring Categories;"
[0096] U.S. publication no. 2010-0010882-A1, published Jan. 14,
2010, filed Aug. 7, 2009, and entitled, "Methods and Apparatus for
Quality Assessment of a Field Service Operation Based on Dynamic
Assessment Parameters;" and
[0097] U.S. publication no. 2010-0010883-A1, published Jan. 14,
2010, filed Aug. 7, 2009, and entitled, "Methods and Apparatus for
Quality Assessment of a Field Service Operation Based on Multiple
Quality Assessment Criteria."
[0098] It should be appreciated that all combinations of the
foregoing concepts and additional concepts discussed in greater
detail below (provided such concepts are not mutually inconsistent)
are contemplated as being part of the inventive subject matter
disclosed herein. In particular, all combinations of claimed
subject matter appearing at the end of this disclosure are
contemplated as being part of the inventive subject matter
disclosed herein. It should also be appreciated that terminology
explicitly employed herein that also may appear in any disclosure
incorporated by reference should be accorded a meaning most
consistent with the particular concepts disclosed herein.
BRIEF DESCRIPTION OF THE DRAWINGS
[0099] FIG. 1 shows an example in which a locate and marking
operation is initiated as a result of an excavator providing an
excavation notice to a one-call center;
[0100] FIG. 2 illustrates one example of a conventional locate
instrument set including a locate transmitter and a locate
receiver;
[0101] FIGS. 3A and 3B illustrate a conventional marking device in
an actuated and non-actuated state, respectively;
[0102] FIG. 4 is a functional block diagram of a data acquisition
system including a locate device for creating electronic records of
locate operations and displaying facilities map information,
according to some embodiments of the present invention;
[0103] FIG. 5 is a perspective view of the data acquisition system
of FIG. 4, illustrating an exemplary locate device upon which some
embodiments of the invention may be implemented;
[0104] FIG. 6 is a flow diagram of an exemplary method for
collecting locate information for generation of an electronic
record, according to one embodiment of the present invention;
[0105] FIG. 7 is a block diagram of an exemplary data structure for
an electronic record of a locate operation including information
retrieved during one or more actuations of a locate receiver,
according to one embodiment of the present invention;
[0106] FIG. 8 is a flow diagram of an exemplary method for
operating a locate device having a locate mode and a landmark mode
so as to collect locate information and/or environmental landmark
information, and generate an electronic record of such information,
according to one embodiment of the present invention;
[0107] FIG. 9 is a block diagram of an exemplary data structure for
an electronic record of a locate operation including both locate
information and landmark information retrieved during actuations of
a locate device, according to one embodiment of the present
invention;
[0108] FIG. 10 is a flow diagram of an exemplary method for
displaying a visual representation of a locate operation in a
display field having a predetermined scale, according to one
embodiment of the present invention;
[0109] FIG. 11 is an example of a visual representation showing
electronic detection marks and identifiers for environmental
landmarks based on data collected by a locate receiver during a
locate operation, according to one embodiment of the present
invention;
[0110] FIG. 12 is an example of another visual representation of
locate operations, according to one embodiment of the present
invention;
[0111] FIG. 13 is an example of another visual representation of a
locate operation, according to another embodiment of the present
invention, in which electronic detection marks and identifiers for
environmental landmarks are overlaid on a digital image of a work
site/dig area;
[0112] FIG. 14 shows a generic display device having a display
field in which one or more display layers and/or sub-layers of
locate information, landmark information and/or image/reference
information may be selectively enabled or disabled for display,
according to one embodiment of the present invention;
[0113] FIG. 15 is a functional block diagram of a data acquisition
system including a locate receiver with both environmental sensors
and operational sensors, according to one embodiment of the present
invention;
[0114] FIG. 16 is a block diagram showing details of the
environmental sensors shown in FIG. 15, according to one embodiment
of the present invention;
[0115] FIG. 17 is a block diagram showing details of the
operational sensors shown in FIG. 15, according to one embodiment
of the present invention;
[0116] FIG. 18 is a block diagram of an exemplary data structure of
an electronic record of a locate operation including information
received from environmental sensors and operational sensors of the
locate receiver, according to one embodiment of the present
invention;
[0117] FIG. 19 illustrates a functional block diagram of an example
of an operations monitoring application for monitoring the use of
locating equipment such as a locate receiver, according to one
embodiment of the present invention;
[0118] FIG. 20 illustrates a functional block diagram of an example
of a locate operations system including the operations monitoring
application of FIG. 19, according to one embodiment of the present
invention;
[0119] FIG. 21 illustrates a method of operation of a locate
operations system including an operations monitoring application,
according to one embodiment of the present invention;
[0120] FIG. 22 is a schematic diagram illustrating a configuration
for determining the difference in location between two points of a
locate receiver;
[0121] FIG. 23 illustrates a pattern of motion of a locate
receiver, according to various of the embodiments described
herein;
[0122] FIG. 24 illustrates a portion of a locate receiver including
tactile indicators, according to one embodiment of the present
invention;
[0123] FIG. 25 illustrates a locate transmitter including a tactile
indicator, according to one embodiment of the present
invention;
[0124] FIG. 26 is a functional block diagram of a data acquisition
system including a locate transmitter with both environmental
sensors and operational sensors, according to one embodiment of the
present invention;
[0125] FIG. 27 illustrates a locate transmitter including a ground
probe for detecting one or more characteristics of a material into
which it is inserted.
DETAILED DESCRIPTION
[0126] Following below are more detailed descriptions of various
concepts related to, and embodiments of, inventive locate apparatus
having enhanced features for underground facility locate
operations, and associated methods and systems. It should be
appreciated that various concepts introduced above and discussed in
greater detail below may be implemented in any of numerous ways, as
the disclosed concepts are not limited to any particular manner of
implementation. Examples of specific implementations and
applications are provided primarily for illustrative purposes.
I. OVERVIEW
[0127] In some embodiments of the present invention, a locate
device employed by a locate technician to detect or infer a
presence or an absence of one or more underground facilities is
particularly configured to acquire "locate information" relating to
a locate operation, and create an electronic record of at least
some of the locate information. As discussed in greater detail
below, examples of locate information relating to the locate
operation that may be logged into an electronic record may include,
but are not limited to, any of the following types of information
or any suitable combinations of such information: [0128] timing
information (e.g., one or more time stamps) associated with one or
more events occurring during a given locate operation; [0129]
geographic information (e.g., one or more geographic coordinates)
associated with one or more events of a locate operation (in some
instances, the geographic information may be accompanied by timing
information, such as a time stamp, for each acquisition of
geographic information); and/or geographic diagnostics information
(e.g., GPS diagnostics information, such as, but not limited to,
the quality of a GPS signal, the number of satellites in view of
the GPS receiver, etc.); [0130] service-related information: one or
more identifiers for the locate technician performing the locate
operation, the locate contractor (service provider) dispatching the
locate technician, and/or the party requesting the locate
operation; [0131] ticket information: information relating to one
or more facilities to be located, location information (e.g., an
address, geo-coordinates, and/or text description) relating to the
work site and/or dig area in which the locate and marking operation
is performed, ground type information (e.g., a description of the
ground at which the locate is performed), excavator information,
other text-based information, etc. [0132] target object
information: information about the target object (e.g., facility)
to be located, such as the type of object, expected depth of
object, etc.; [0133] locate signal information: information
entered, detected and/or sensed as part of performing the locate
operation relating to one or more signals representing a presence
or absence of one or more underground facilities, such as magnetic
field strength and frequency, electric current magnitude, depth of
the located object, the mode of operation of the locate receiver
(e.g., peak v. null detection modes), the gain of the locate
receiver, etc. With respect to locate receivers, the "gain" is
typically a measure of the degree of sensitivity of a locate
receiver antenna that is picking up a signal emanating from along
an underground facility (alternatively, "gain" may be viewed as a
degree of amplification being applied to a received signal). Gain
may be expressed in terms of any scale (e.g., 0-100), as a numeric
value or percentage. "Signal strength" (or "magnetic field
strength") refers to the strength of a received signal at a given
gain value; signal strength similarly may be expressed in terms of
any scale, as a numeric value or percentage. Generally speaking,
higher signal strengths at lower gains typically indicate more
reliable information from a locate receiver, but this may not
necessarily be the case for all locate operations; [0134] locate
receiver information: information about the locate receiver, such
as identification of the locate receiver (e.g., serial number),
make and model of the locate receiver, mode of operation (e.g.,
passive or active, and peak or null), battery level, etc.; [0135]
transmitter information: information about any transmitter and
transmitter signal (also referred to herein as an applied signal)
utilized for the locate operation, such as transmitter type,
identification of the transmitter (e.g., serial number), make and
model of the transmitter, mode of operation (e.g., inductive and
conductive), battery level, connection type, electrical ground
type, electrical ground position, moisture content of physical
ground to which electrical ground contact is made, pH of physical
ground, applied signal frequency, available signal frequencies,
transmitter power, whether a continuity indication is provided for
the applied signal, etc.; [0136] tracer wire information:
information about a tracer wire provided along the underground
facility, such as tracer wire material (e.g., aluminum, tin/steel,
copper/stainless steel, etc.), gauge of the tracer wire, condition
of the tracer wire (e.g., whether intact, broken, corroded, etc.),
etc.; [0137] environmental information: information derived from
one or more environmental sensors associated with the locate
device, examples of which sensors include, but are not limited to,
temperature sensors, humidity sensors, light sensors, altitude
sensors, image capture devices and audio recorders, as well as
information that may be manually entered (e.g., by a technician)
relating to environmental conditions (e.g., ground type in the area
of the locate operation, which could also or alternatively be
indicated in ticket information); [0138] operational information:
information derived from one or more operational sensors associated
with the locate device, examples of which sensors include, but are
not limited to, operational temperature sensors, a compass, an
inclinometer, one or more accelerometers, a yaw rate sensor, a
proximity sensor, a pressure sensor, one or more device health
sensors, image capture devices, and audio devices; and [0139]
Device health information: information about the status of one or
more components of a locate device, such as battery status, WiFi
connectivity status, GPS receiver status (e.g., GPS signal
strength/quality, number of satellites in view), etc.
[0140] Locate information including any or all of the foregoing
types of information may be logged/stored in local memory of a
locate device, formatted in various manners, processed and/or
analyzed at the locate device itself, and/or transmitted to another
device (e.g., a remote computer/server) for storage, processing
and/or analysis. In particular, environmental and/or operational
information may be used to control operation of the locate device,
assess out-of-tolerance conditions in connection with use of the
locate device, and/or provide alerts or other feedback. In yet
other embodiments, operational information may be analyzed and
processed so as to improve a determination of a location (e.g., GPS
coordinates) of a detecting tip of the locate device (e.g., a
portion of the locate device close to the ground, pavement or other
surface below which one or more underground facilities may be
disposed) during use.
[0141] In other embodiments, a locate device may be configured to
operate in multiple different modes so as to collect various
information relating not only to a locate operation itself, but
additionally (or alternatively) various information relating to the
work site/dig area in which the locate operation is performed. For
example, in one implementation, the locate device may be configured
to operate in a first "locate mode" as well as a second "landmark
identification mode" (or more simply "landmark mode"). In a "locate
mode," various functionality may be enabled relating to the
detection of a presence or absence of an underground facility.
Alternatively, in a "landmark mode," a technician positions the
locate device proximate to an environmental landmark of interest
and the locate device collects various information about the
landmark (hereafter referred to as "landmark information"). As
discussed in greater detail below, landmark information may
include, but is not limited to, geo-location data of an
environmental landmark, type of environmental landmark, and a time
stamp for any acquired information relating to an environmental
landmark.
[0142] In other embodiments, a locate device may be operated in a
"solo" mode or a "group" mode. In particular, in a "solo" mode, the
locate device may be operated as an individual, independent device
to collect, store and/or transmit data, whereas in "group" mode, a
locate device may act as a "worker" device or a "leader" device to
facilitate consolidation of data collected by multiple devices
(e.g., relating to a same ticket) to a host server.
[0143] In yet other embodiments, a locate device may be equipped
with an enhanced user interface having tactile functionality; in
particular, the locate device may include one or more tactile
indicators (e.g., vibrating devices) disposed, for example, in a
handle, joy stick, actuator or elsewhere on the device, to provide
a tactile indication to a technician using the locate device (e.g.,
as feedback in connection with an operating mode, operating
condition, environmental condition, etc.).
[0144] In various implementations of the methods and apparatus
described herein, data from one or more electronic records,
including one or more pieces of locate information and/or one or
more pieces of landmark information, may be processed and analyzed
to provide insight into the locate operation. In one embodiment, a
computer-generated image or other visual representation based on
the locate information and/or landmark information may be
electronically rendered; for example, this visual representation
may provide electronic indications ("electronic detection marks")
of the relative location of detected underground facilities during
a locate operation, and electronic detection marks corresponding to
different types of facilities may be color-coded. Additionally,
electronic identifiers (e.g., icons, shapes, symbols, patterns,
etc.) of one or more environmental landmarks may be included in a
visual representation, alone or together with electronic detection
marks. Such a visual representation may be used, for example, to
provide immediate feedback to the locate technician (e.g., via a
display device associated with the locate device), provide
essentially real-time feedback to a supervisor monitoring the
technician's work from a remote location, provide a visual record
of the locate information and/or landmark information (e.g., for
archiving purposes once one or more electronic records are
generated), and/or to verify the quality (e.g., accuracy and
completeness) of work performed during a locate and marking
operation.
II. LOCATE DEVICE
[0145] As discussed above, a locate device may refer to either a
locate transmitter or a locate receiver. In one embodiment of the
present invention, one or both of a locate transmitter and a locate
receiver may be particularly configured to acquire locate
information relating to a locate operation, generate an electronic
record of the acquired locate information, and store, transmit,
analyze or otherwise process the acquired locate information. While
a detailed illustrative embodiment is described below using the
example of a locate receiver, it should be appreciated that the
various inventive concepts disclosed herein in connection with
enhanced features for locate receivers may be applied similarly, if
not identically in some instances, to locate transmitters as
well.
[0146] Various types of locate information may be generated during,
or otherwise associated with, the use of a locate device (e.g., a
locate receiver or a locate transmitter) or a locate set to perform
a locate operation. Exemplary categories of locate information were
provided above as an overview; however, it should be appreciated
that these exemplary categories are provided primarily for purposes
of illustration, and that locate information is not limited
according to various embodiments discussed herein to the particular
exemplary categories and types of information outlined above.
[0147] In general, locate information related to the use of the
transmitter may include, but is not limited to, information about
the applied signal power, the applied signal frequency, the
possible or available signal frequencies (e.g., if the locate
transmitter has more than one frequency available), the presence,
magnitude, and type of noise (e.g., distortion) on the applied
signal (e.g., a signal-to-noise ratio), the location of the
transmitter, the mode of operation (e.g., conductive or inductive)
and therefore the manner in which connection is made to the target
object (e.g., direct connection or inductive clamp), an
identification of the transmitter unit (e.g., serial number), make
and model of the transmitter unit, information about how the
transmitter unit is grounded (if at all), and an indication of
whether a sufficient electrical connection has been made to the
target object (e.g., some transmitters produce a "continuity
signal" indicative of the quality of the connection between the
transmitter and the target object). Locate information related to
the use of the locate receiver may include, but is not limited to,
an identification of the locate receiver (e.g., a serial number),
the mode of operation of the locate receiver (e.g., peak mode v.
null mode, as well as active v. passive mode), the frequency to
which the locate receiver is tuned, the gain of the locate
receiver, the frequency of a detected magnetic field, the
amplitude/strength of a detected magnetic field, the electrical
current of the detected signal, the location of the locate
receiver, and a depth measurement taken by the locate receiver
(which may be used, for example, as additional information
regarding a target object). In addition, locate information
relating to the locate operation itself may include, but is not
limited to, information about the target object, the location of
the locate site, the party requesting the locate, the party
performing the locate, and whether any locate operations have
previously been performed for this site.
[0148] Information about a tracer wire may also be included in
locate information. For example, information about the material of
a tracer wire may be collected (e.g., input verbally or textually
by a technician), which may indicate a type of underground facility
(e.g., aluminum may indicate cable, tin/steel may indicate phone,
and copper/stainless steel may indicate gas, among others). The
wire gauge of the tracer wire, as well as the condition of the
tracer wire (e.g., intact, corroded, etc.) may also be visually
determined by a locate technician and recorded verbally, textually,
or in any other manner. Moreover, whether the tracer wire is broken
may be visually detected and noted as part of locate information.
Similarly, whether a service line is properly bonded to a main may
be useful locate information. Furthermore, information about the
type of sheathing for the tracer wire may be included as part of
locate information. Other types of information may also be
considered locate information, as these are non-limiting
examples.
[0149] According to some aspects of the invention, locate
information relating to a locate set, and/or locate operation more
generally, may be generated, recorded, transmitted, and/or
processed, for example, to enable evaluation of the performance of
the locate technician, evaluation of the operation of the locate
equipment, reconstruction of the actions taken by the locate
technician during the locate operation, and/or to facilitate
comparison of collected data to historical data.
[0150] In one exemplary embodiment, a locate receiver is configured
to store and/or transmit locate information relating to a locate
set and/or a locate operation, and in some implementations generate
an electronic record of at least some of the locate information.
FIGS. 4 and 5 illustrate a functional block diagram and perspective
view, respectively, of one example of a data acquisition system
100, including a locate device such as a locate receiver 110 and
optionally a remote computer 150, according to one embodiment of
the present invention. One or both of the locate receiver 110 and
the remote computer 150 of the data acquisition system 100 may be
configured to collect locate information relating to performance of
a locate operation.
[0151] As shown in FIG. 4, in one embodiment locate receiver 110
includes control electronics 112, the components of which are
powered by a power source 114. Power source 114 may be any power
source that is suitable for use in a portable device, such as, but
not limited to, one or more rechargeable batteries, one or more
non-rechargeable batteries, a solar photovoltaic panel, a standard
AC power plug feeding an AC-to-DC converter, and the like.
[0152] As also shown in FIG. 4, in one embodiment control
electronics 112 of locate receiver 110 may include, but are not
limited to, a processor 118, at least a portion of an actuation
system 120 (another portion of which may include one or more
mechanical elements), a local memory 122, a communication interface
124, a user interface 126, a timing system 128, and a location
tracking system 130.
[0153] The processor 118 may be any general-purpose processor,
controller, or microcontroller device. Local memory 122 may be any
volatile or non-volatile data storage device, such as, but not
limited to, a random access memory (RAM) device and a removable
memory device (e.g., a universal serial bus (USB) flash drive, a
multimedia card (MMC), a secure digital card (SD), a compact flash
card (CF), etc.). As discussed further below, the local memory may
store a locate data algorithm 137, which may be a set of
processor-executable instructions that when executed by the
processor 118 causes the processor to control various other
components of the locate receiver 110 so as to generate an
electronic record 135 of a locate operation, which record also may
be stored in the local memory 122 and/or transmitted in essentially
real-time (as it is being generated) or after completion of a
locate operation to a remote device (e.g., remote computer
150).
[0154] In one exemplary implementation, a Linux-based processing
system for embedded handheld and/or wireless devices may be
employed in the locate receiver 110 to implement various components
of the control electronics 112. For example, the Fingertip4.TM.
processing system, including a Marvell PXA270 processor and
available from InHand Electronics, Inc.
(www.inhandelectronics.com/products/fingertip4), may be used. In
addition to the PXA270 processor (e.g., serving as the processor
118), the Fingertip4.TM. includes flash memory and SDRAM (e.g.,
serving as local memory 122), multiple serial ports, a USB port,
and other I/O interfaces (e.g., to facilitate interfacing with one
or more input devices and other components of the locate receiver),
supports a variety of wired and wireless interfaces (WiFi,
Bluetooth.RTM., GPS, Ethernet, any IEEE 802.11 interface, or any
other suitable wireless interface) to facilitate implementation of
the communication interface 124, and connects to a wide variety of
LCD displays (to facilitate implementation of a user
interface/display). In yet other exemplary implementations, the
processor 118 may be realized by multiple processors that
divide/share some or all of the functionality discussed herein in
connection with the processor 118. For example, in one
implementation, an Atom.TM. processor available from Intel
Corporation of Santa Clara, Calif., may be used alone or in
connection with one or more PIC processors to accomplish various
functionality described herein.
[0155] Communication interface 124 of locate receiver 110 may be
any wired and/or wireless communication interface by which
information may be exchanged between locate receiver 110 and an
external or remote device, such as a remote computing device that
is elsewhere in the dig area (i.e., not a part of the locate
receiver 110) or outside the dig area. For example, data that is
provided by components of data acquisition system 100 and/or stored
in local memory 122 (e.g., one or more electronic records 135) may
be transmitted via communication interface 124 to a remote
computer, such as remote computer 150, for processing. Examples of
wired communication interfaces may include, but are not limited to,
USB ports, RS232 connectors, RJ45 connectors, Ethernet, and any
combination thereof. Examples of wireless communication interfaces
may include, but are not limited to, an Intranet connection,
Internet, Bluetooth.RTM. technology, Wi-Fi, Wi-Max, IEEE 802.11
technology (e.g., operating at a minimum bandwidth of 54 Mbps, or
any other suitable bandwidth), radio frequency (RF), Infrared Data
Association (IrDA) compatible protocols, Local Area Networks (LAN),
Wide Area Networks (WAN), Shared Wireless Access Protocol (SWAP),
any combination thereof, and other types of wireless networking
protocols. The wireless interface may be capable of capturing
signals that reflect a user's intent. For example, the wireless
interface may include a microphone that can capture a user's intent
by capturing the user's audible commands. Alternatively, the
wireless interface may interact with a device that monitors a
condition of the user, such as eye movement, brain activity, and/or
heart rate.
[0156] User interface 126 of locate receiver 110 may be any
mechanism or combination of mechanisms by which a user may operate
data acquisition system 100 and by which information that is
generated by data acquisition system 100 may be presented to the
user. For example, user interface 126 may include, but is not
limited to, a display device (including integrated displays and
external displays, such as Heads-Up Displays (HUDs)), a touch
screen, one or more manual pushbuttons, a microphone to provide for
audible commands, one or more light-emitting diode (LED)
indicators, one or more toggle switches, a keypad, an audio output
(e.g., speaker, buzzer, and alarm), and any combination thereof. In
one implementation, the user interface 126 includes a "menu/on"
button to power up the locate receiver and provide a menu-driven
graphical user interface (GUI) displayed by the display device
(e.g., menu items and/or icons displayed on the display device) and
navigated by the technician via a joystick or a set of four
"up/down/left/right" buttons, as well as a "select/ok" button to
take some action pursuant to the selection of a menu item/icon. As
described below, the display may also be used in some embodiments
of the invention to display various images germane to a locate
and/or marking information, as well as information relating to a
placement of marking material in a dig area, a location of an
underground facility in a dig area, or any other suitable
information that may be displayed based on information acquired to
create an electronic record 135.
[0157] In various embodiments, the one or more interfaces of the
locate receiver 110--including the communication interface 124 and
user interface 126--may be used as input devices to receive
information to be stored in the memory 122, to facilitate various
functions of the locate receiver and/or to be logged as part of an
electronic record of a locate operation. In some cases, locate
information received via the interface(s) (e.g., via the
communication interface 124) may include ticket information
regarding underground facilities to be detected during a locate
operation. As another example, using an interface such as the user
interface 126, service-related information may be input, including
an identifier for the locate receiver used by the technician, an
identifier for a technician, and/or an identifier for the
technician's employer. Alternatively, some or all of the
service-related information similarly may be received via the
communication interface 124 (and likewise some or all of the ticket
information may be received via the user interface 126). As also
noted above, various image information also may be received via the
communication interface 124.
[0158] The actuation system 120 of locate receiver 110 shown in the
block diagram of FIG. 4 may include both electrical and mechanical
elements according to various embodiments, and for purposes of
illustration is shown in FIG. 4 as included as part of the control
electronics 112. The actuation system 120 may include a mechanical
and/or electrical actuator mechanism (e.g., see the actuator 142
shown in FIG. 5) to provide one or more signals or stimuli as an
input to the actuation system 120. Upon receiving one or more
signals or stimuli (e.g., actuation/triggering by a locate
technician or other user), the actuation system 120 may cause the
logging of various data constituting locate information. To this
end, the actuation system 120 may provide one or more output
signals in the form of an actuation signal 121 to the processor 118
to indicate one or more actuations of the locate receiver, in
response to which the processor 118 may acquire/collect various
locate information and log data into the electronic record 135.
[0159] Location tracking system 130 of locate receiver 110
constitutes another type of input device that provides locate
information, and may include any device that can determine its
geographical location to a certain degree of accuracy. For example,
location tracking system 130 may include a global positioning
system (GPS) receiver or a global navigation satellite system
(GNSS) receiver. A GPS receiver may provide, for example, any
standard format data stream, such as a National Marine Electronics
Association (NMEA) data stream, or other data formats. An error
correction component may be, but is not limited to, any mechanism
for improving the accuracy of the geographic information provided
by location tracking system 130; for example, an error correction
component may be an algorithm for correcting any offsets (e.g., due
to local disturbances in the atmosphere) in the geo-location data
of location tracking system 130. An error correction component may
reside at the location tracking system 130 or a remote computing
device, such as remote computer 150. In other embodiments, location
tracking system 130 may include any device or mechanism that may
determine location by any other means, such as performing
triangulation by use of cellular radiotelephone towers.
[0160] In one exemplary implementation, the location tracking
system 130 may include an ISM300F2-05-V0005 GPS module available
from Inventek Systems, LLC of Westford, Mass. (see
www.inventeksys.com/html/ism300f2-c5-v0005.html). The Inventek GPS
module includes two UARTs (universal asynchronous
receiver/transmitter) for communication with the processor 118,
supports both the SIRF Binary and NMEA-0183 protocols (depending on
firmware selection), and has an information update rate of 5 Hz. A
variety of geographic location information may be requested by the
processor 118 and provided by the GPS module to the processor 118
including, but not limited to, time (coordinated universal
time--UTC), date, latitude, north/south indicator, longitude,
east/west indicator, number and identification of satellites used
in the position solution, number and identification of GPS
satellites in view and their elevation, azimuth and SNR values, and
dilution of precision values. Accordingly, it should be appreciated
that in some implementations the location tracking system 130 may
provide a wide variety of geographic information as well as timing
information (e.g., one or more time stamps) to the processor
118.
[0161] In another embodiment, location tracking system 130 may not
reside locally on locate receiver 110. Instead, location tracking
system 130 may reside on any on-site computer, which serves as a
location reference point, to which the location of locate receiver
110 may be correlated by any other means, such as, but not limited
to, by a triangulation technique between the on-site computer and
locate receiver 110.
[0162] With respect to other input devices of the locate receiver
110 that may provide locate information, the control electronics
112 may also include a timing system 128 having an internal clock
(not shown), such as a crystal oscillator device, for processor
118. Additionally, timing system 128 may include a mechanism for
registering time with a certain degree of accuracy (e.g., accuracy
to the minute, second, or millisecond) and may also include a
mechanism for registering the calendar date. In various
implementations, the timing system 128 may be capable of
registering the time and date using its internal clock, or
alternatively timing system 128 may receive its time and date
information from the location tracking system 130 (e.g., a GPS
system) or from an external timing system, such as a remote
computer or network, via communication interface 124. In yet other
implementations, a dedicated timing system for providing timing
information to be logged in an electronic record 135 may be
optional, and timing information for logging into an electronic
record may be obtained from the location tracking system 130 (e.g.,
GPS latitude and longitude coordinates with a corresponding time
stamp). Timing information may include, but is not limited to, a
period of time, timestamp information, date, and/or elapsed
time.
[0163] As shown in FIGS. 4 and 5, the locate receiver 110 further
includes detection electronics 131, which provides another example
of an input device that may provide location information to the
processor 118. In exemplary implementations, the detection
electronics 131 in turn includes an RF antenna 127, a detection
circuit 139, and a processing circuit 133. Each of these components
is explained in greater detail further below.
[0164] In one embodiment, information provided by one or more input
devices of the locate receiver 110 (e.g., the timing system 128,
the location tracking system 130, the detection electronics 131,
the user interface 126, the communication interface 124) is
acquired and logged (stored in memory) upon actuation of the
actuation system 120 (e.g., triggering an actuator). Some
embodiments of the invention may additionally or alternatively
acquire/log information from one or more input devices at one or
more times during or throughout an actuation, such as when a
technician is holding a mechanical or electrical actuator for some
period of time and moving to detect a presence of an underground
facility. In various aspects of such embodiments, locate
information derived from one or more input devices may be collected
at a start time of an actuation, at one or more times during an
actuation, and in some cases at regular intervals during an
actuation (e.g., several times per second, once per second, once
every few seconds). Further, some locate information may be
collected at an end of an actuation, such as time information that
may indicate a duration of an actuation.
[0165] Additionally, it should be appreciated that while some
locate information may be received via one or more input devices at
the start of each locate operation and upon successive actuations
of the locate receiver, in other cases some locate information, as
well as facilities maps information and/or other image information,
may be collected by or provided to the locate receiver prior to a
locate operation (e.g., on power-up or reset of the locate
receiver, as part of an electronic instruction or dispatch by a
locate company, and/or in response to a request/query from a locate
technician), and stored in local memory 122 for subsequent use by
the locate receiver (e.g., display of information via the user
interface display 146, later incorporation into an electronic
record, etc.). For example, prior to a given locate operation and
one or more actuations of the locate receiver, one or more of
ticket information, service-related information, and image
information, may have already been received (e.g., via the
communication interface 124 and/or user interface 126) and stored
in local memory 122. Pursuant to a locate operation (e.g.,
immediately before, during and/or after a locate operation),
information previously received via the interface(s) may be
retrieved from the local memory (if stored there initially), and
displayed and/or entered into an electronic record as appropriate,
in some case together with information collected pursuant to one or
more actuations of the locate receiver. In some implementations,
ticket information and/or service-related information may be
received via the interface(s) and stored in an entry in the
electronic record 135 "directly" in response to one or more
actuations of the locate receiver (e.g., without being first stored
in local memory).
[0166] In sum, according to embodiments of the present invention,
various locate information from one or more input devices, as well
as image information, regardless of how or when it is received, may
be displayed in various manners and/or stored in memory of the
locate receiver (e.g., in an electronic record of a locate
operation), and in some implementations at least some of the locate
information may be logged pursuant to one or more actuations of the
locate receiver.
[0167] In various implementations, the optional remote computer 150
of the data acquisition system 100 may be any external computer
system with which the locate receiver 110 communicates (e.g., via
the communications interface 124). In one embodiment, the remote
computer 150 may be a centralized computer, such as a central
server of an underground facility locate service provider. In
another embodiment, remote computer 150 may be a computer that is
at or near the work site (i.e., "on-site"), e.g., a computer that
is present in a locate technician's vehicle. The remote computer
may also or alternatively store one or more of the electronic
record 135, the locate data algorithm 137 and one or more
images.
[0168] According to one embodiment, the remote computer may form
part of a docking station in which a locate device (e.g., a locate
receiver or locate transmitter) may be docked, for example when not
in use. The docking station may be mechanically and electrically
coupled to the locate device. For example, the docking station may
provide mechanical support via a clip, a clamp, a strap, or other
mechanical device for holding the locate device in place. The
docking station may also provide electrical interconnection to the
locate device, via which the power supply of the locate device may
be charged and/or data may be transferred. Suitable docking
stations are described in U.S. patent application Ser. No.
12/571,411, filed Sep. 30, 2009 under Attorney Docket No.
D0687.70009US01 and entitled "Marking Device Docking Stations and
Methods of Using Same", which is hereby incorporated herein by
reference in its entirety. Docking stations according to the
concepts described therein may also be applicable to the locate
devices described herein. According to one embodiment, a locate
receiver may communicate with the docking station via communication
interface 124, although other configurations are possible.
[0169] Docking events (e.g., docking and de-docking of a locate
receiver) may be recorded as event entries, for example similar in
form to the event entries of Tables 2-5, discussed in detail below.
Table 1A illustrates an example of event entry indicating a change
in docking status of a locate receiver. Other entry formats are
also possible.
TABLE-US-00001 TABLE 1A Format INFO+DOCK: (DATE) (TIME) (GPS data)
(DOCKING STATE) <CR><LF> Examples INFO+ DOCK R:
DATE(2009-04-15) TIME(12:04:44)
GPS($GPGGA,120443,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
) DOCK(DOCKED)<CR><LF> INFO+ DOCK: DATE(2009-04-15)
TIME(12:04:45)
GPS($GPGGA,120445,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
) DOCK(DE-DOCKED)<CR><LF> INFO+ DOCK: DATE(2009-04-15)
TIME(12:04:46)
GPS($GPGGA,120446,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
) DOCK(DOCKED)<CR><LF>
[0170] Whether resident and/or executed on either the locate device
110 or the remote computer 150, as noted above the locate data
algorithm 137 includes a set of processor-executable instructions
(e.g., stored in memory, such as local memory 122 of the locate
device) that, when executed by processor 118 of the locate device
110 or another processor, processes information (e.g., various
locate information) collected in connection with a locate
operation. Locate data algorithm 137, when executed by the
processor 118, may cause the processor to perform collection,
logging/storage (creation of electronic records), and in some
instances further processing and analysis of various locate
information. For example, as discussed in further detail below, the
operations of locate data algorithm 137 as effected by the
processor 118 may include, but are not limited to, the following:
[0171] (1) reading in (acquiring) data that is generated by any
component (e.g., one or more input devices); [0172] (2) processing
the information that is collected and, in some instances,
associating the collected information with respective actuations of
an actuator (e.g., if the locate device is operated in a manual or
semi-automatic mode based on actuation, as discussed further
below); for example, any information collected may be
parsed/packaged so as to be associated with any one or more
actuations of the locate device, irrespective of when the data was
actually acquired; [0173] (3) formatting the acquired information,
e.g., as multiple time-stamped event entries, which in some
instances may constitute actuation data sets forming an electronic
record, wherein each actuation data set corresponds to a particular
actuation; and [0174] (4) using respective entries of an electronic
record to visually recreate the locate operation (e.g., render a
computer-generated representation in a display field, wherein
respective entries correspond to electronic detection marks).
[0175] It should also be appreciated that, in some embodiments, the
locate data algorithm 137 may include one or more adjustable
parameters that govern various aspects of the collection and
logging of locate information (e.g., the rate at which various
locate information is collected from one or more input devices),
and that these parameters may be adjusted or set, for example, by
an administrator at a remote computer, after which the locate data
algorithm is downloaded to the locate device for execution by the
processor 118. Alternatively, in other implementations, adjustable
parameters of a locate data algorithm already resident on a locate
device may in some cases be adjusted remotely via the communication
interface, or locally via the user interface.
[0176] While the functionality of various components of the locate
receiver 110 was discussed above in connection with FIG. 4, FIG. 5
shows some structural aspects of the locate receiver 110 according
to one embodiment. For example, the locate receiver 110 may include
an elongated housing 136 in which is disposed one or more elements
of the actuation system 120, one or more elements of the control
electronics 112 and the power source 114. Elongated housing 136 may
be hollow or may contain certain cavities or molded compartments
for installing any components therein, such as the various
components of locate receiver 110 that are shown in FIG. 4. The
elongated housing 136 and other structural elements associated with
the housing, as discussed below, may be formed of any rigid,
semi-rigid, strong, and lightweight material, such as, but not
limited to, molded plastic and aluminum.
[0177] Incorporated at a proximal end of elongated housing 136 may
be a handle 138, which provides a convenient grip by which the user
(e.g., the locate technician) may carry the locate receiver 110
during use (i.e., the exemplary locate receiver depicted in FIG. 5
is intended to be a hand-held device). In one implementation, the
power source 114 may be provided in the form of a removable battery
pack housing one or more rechargeable batteries that are connected
in series or parallel in order to provide a DC voltage to locate
receiver 110, and disposed within a compartment in the handle 138.
Such an arrangement facilitates use of conventional
removable/rechargeable battery packs often employed in a variety of
cordless power tools, in which the battery pack similarly is
situated in a handle of the tool. It should be appreciated,
however, that the power source 114 in the form of a battery pack
may be disposed in any of a variety of locations within or coupled
to the elongated housing 136.
[0178] As also shown in FIG. 5, mounted near handle 138 is user
interface 126, which may include a display 146. The display 146 may
be a touch screen display to facilitate interaction with a
user/technician, and/or the user interface also may include one or
more buttons, switches, joysticks, a keyboard, and the like to
facilitate entry of information by a user/technician. One or more
elements of the control electronics 112 (e.g., the processor 118,
memory 122, communication interface 124, and timing system 128)
also may be located in the proximal end of the elongated housing in
the vicinity of the user interface 126 and display 146. As with the
power source 114, it should be appreciated that one or more
elements of the control electronics 112 may be disposed in any of a
variety of locations within or coupled to the elongated housing
136.
[0179] In the embodiment of FIG. 5, the location tracking system
130 similarly may be positioned on the proximal end of the
elongated housing 136 to facilitate substantially unobstructed
exposure to the atmosphere; in particular, as illustrated in FIG.
5, the location tracking system 130 may be situated on a ground
plane 138 (providing an electrical ground at least at the antenna
frequency of the location tracking system, e.g., at approximately
1.5 GHz) that extends from the proximal end of the housing 136 and
is approximately parallel to the ground, surface or pavement when
the locate receiver is being normally operated by a technician (so
as to reduce signal modulation with subtle movements of the locate
receiver). As also shown in FIG. 5, incorporated at the distal end
of elongated housing 136 is the detection electronics 131,
including RF antenna 127.
[0180] With respect to the actuation system 120, as shown in FIG.
5, the actuation system 120 includes an actuator 142, which for
example may be a mechanical mechanism provided at the handle 138 in
the form of a trigger that is pulled by a finger or hand of an
user/technician. In response to the signal/stimulus provided by the
actuator 142, as discussed above the actuation system may provide
an actuation signal 121 to the processor 118 to indicate an
actuation. As discussed in further detail below, pursuant to the
execution by the processor 118 of the locate data algorithm 137,
the actuation signal 121 may be used to cause the logging of
information that is provided by one or more components of the
locate receiver 110 so as to generate an electronic record of the
locate operation.
[0181] With respect to the general functionality facilitated and/or
implemented by execution of the locate data algorithm 137, in some
embodiments, a user may commence a locate operation with the locate
receiver by inputting various information to the locate receiver,
and/or selecting various operating options, via the user interface.
As a non-limiting example, the user may select from various menu
options (using the user interface and display as a menu-driven
GUI), and or manually enter via the user interface, the type of
target object/facility to be located, the address of the locate
operation, the ground type (e.g., grass, pavement, etc.), whether
or not a separate transmitter is being used, the mode of the locate
receiver (e.g., Peak v. Null, and active v. passive), whether the
locate receiver is being operated in landmark mode or not
(described further below), or any other information of interest to
a locate operation.
[0182] In one exemplary implementation, the user may first power on
the locate receiver and log on, for example by entering a user ID.
The user may then navigate through a menu on a touch screen of the
user interface to select the target object to be located, for
example selecting from among a list of options (e.g., including
facility types such as gas, sewer, cable, and phone, etc.).
Similarly, the user may then navigate through a menu to select the
ground type in the area of the locate operation (e.g., selecting
from a list of options including grass, pavement, dirt, etc.). The
user may then similarly select or input the frequency of any
applied signal provided by a transmitter (in those embodiments in
which a transmitter is used), for example using a keypad of the
user interface or a menu-driven GUI. It should be provided that
these examples of user actions are non-limiting, and furthermore
that in some embodiments one or more of the pieces of information
listed may be detected automatically and not be input/selected by
the user.
[0183] Once the target object/facility type and any other relevant
or desired information is input and/or selected by the technician,
and the applied signal from the transmitter is coupled to the
target object (in those embodiments in which the locate receiver is
used with a locate transmitter, i.e., in active modes of operation
as opposed to passive modes in which no transmitter may be used),
the locate receiver may be used in a variety of manners by the
technician for a locate operation, in which the technician
generally positions (e.g., sweeps) the locate receiver over an area
in which they expect to detect an underground facility. More
specifically, the technician positions the locate receiver such
that the RF antenna 127 (which may include more than one antenna,
as described further below) may receive/detect a magnetic field
emitted by the target object (see underground facility 28 in FIG.
2).
[0184] In some embodiments, the locate receiver 110 is capable of
operating in a null mode (e.g., capable of detecting a null signal
when positioned over an object (e.g., facility) emitting a magnetic
field), such that RF antenna 127 may comprise a null detection
antenna 127c. Alternatively, the locate receiver 110 is capable of
operating in a peak detection mode (e.g., capable of detecting a
peak signal when over an object (e.g., facility) emitting a
magnetic field), and the RF antenna 127 comprises two peak
detection antennae 127a and 127b, which may be positioned
substantially parallel to each other but at different positions
within the locate receiver (e.g., at different heights). In some
embodiments, the locate receiver 110 is capable of operating in
both peak detection and null detection modes, and the RF antenna
127 may comprise three antennae, e.g., one null detection antenna
127c and two peak detection antennae 127a and 127b, as shown in
FIG. 5. However, RF antenna 127 may comprise any other number,
type, and orientation of antennae, as the locate receivers
described herein are not limited in these respects.
[0185] With reference again to FIG. 4, the RF antenna 127 may be
coupled to the detection circuit 139 such that the signal(s)
received/detected by the RF antenna 127 may be provided to the
detection circuit 139 as an output signal of the RF antenna. The
output signal of the RF antenna may be any frequency detectable by
the antenna, and in some embodiments may be between approximately
512 Hz and 1 MHz, although these non-limiting frequencies are
provided primarily for purposes of illustration. As mentioned, the
output signal of the RF antenna 127, which in some embodiments is
an analog signal, may be provided to detection circuit 139, which
may perform various functions. For example, the detection circuit
139 may perform various "front-end" operations on the output signal
of RF antenna 127, such as filtering, buffering, frequency shifting
or modulation, and/or pre-amplifying the output signal.
Furthermore, the detection circuit 139 may perform additional
functions, such as amplifying and/or digitizing the output signal
provided by RF antenna 127. It should be appreciated, however, that
the types of functions described as being performed by detection
circuit 139 are non-limiting examples, and that other functions may
additionally or alternatively be performed.
[0186] After detection circuit 139 has operated on the signal from
RF antenna 127 (e.g., by filtering, buffering, amplifying, and/or
digitizing, among other possible operations), it may provide a
signal to processing circuit 133. The processing circuit 133 may
process the signal(s) provided by detection circuit 139 in any
suitable manner to determine any information of interest. For
example, according to one embodiment, the processing circuit 133
may process the signal(s) from detection circuit 139 to determine a
magnetic field strength of a magnetic field detected by RF antenna
127. The processing circuit 133 may process the signal(s) from
detection circuit 139 to determine an amplitude and/or direction of
the electrical current creating the magnetic field(s) detected by
RF antenna 127. Processing circuit 133 may perform operations to
calculate, for example, the depth and location of the target
facility based on the electromagnetic fields detected by RF antenna
127. Processing circuit 133 may be an analog circuit or a digital
microprocessor, or any other suitable processing component for
performing one or more of the operations described above, or any
other operations of interest with respect to signals detected by RF
antenna 127. Also, it should be appreciated that processing circuit
133 and processor 118 may be a single processor in some
embodiments, as the illustration of them as distinct in FIG. 4 is
only one non-limiting example.
[0187] According to various embodiments, the manner in which locate
information derived from one or more exemplary input devices is
logged to local memory 122 (e.g., pursuant to the locate data
algorithm 137) may depend at least in part on the type of data
being logged, as the operation of locate receiver 110 is not
limited in this respect. Some general concepts relating to data
acquisition are introduced initially below and discussed in greater
detail in connection with FIG. 6.
[0188] In some exemplary implementations, various types of locate
information, including data from timing system 128 and/or location
tracking system 130, may be automatically logged continuously
(e.g., in the form of streaming packets with flag fields, as
described below, or in any other continuous form) or periodically
to the local memory 122, may be logged in response to one or more
types of conditions/events (e.g., may be logged automatically when
a particular condition/event occurs), and/or may be logged at any
suitable times. In particular, in one implementation, logging may
occur at periodic intervals during performance of a locate
operation, such as every second, every five seconds, every minute,
or at any other suitable time interval.
[0189] According to another embodiment, various locate information,
including timing information and/or geographic information from
timing system 128 and location tracking system 130, respectively,
may be logged in response to particular types of events, such as
detecting an underground facility or detecting the absence of an
underground facility. Such events may be identified by signals
output by processing circuit 133 to processor 118. As a
non-limiting example, timing information and/or geographic
information may be logged when a characteristic (e.g., magnetic
field strength) of a signal detected by RF antenna 127 is greater
than a particular threshold value, which may be indicated by a
signal output from processing circuit 133 to processor 118, and
which occurrence may be indicative of the presence of an
underground facility. Similarly, in some embodiments, timing
information and/or geographic information may be logged when a
signal detected by RF antenna 127 has a magnitude above a first
threshold and the gain of the locate receiver 110 is above a second
threshold. It should be appreciated that various combinations of
detected signals detected by locate receiver 110 may be used to
trigger logging of information (e.g., timing information and/or
geographic information) to local memory. It should also be
appreciated that any information available from the location
tracking system 130 (e.g., any information available in various
NMEA data messages, such as coordinated universal time, date,
latitude, north/south indicator, longitude, east/west indicator,
number and identification of satellites used in the position
solution, number and identification of GPS satellites in view and
their elevation, azimuth and SNR values, dilution of precision
values) may be included in geographic information constituting all
or a portion of logged locate information.
[0190] In some embodiments, various locate information may be
logged in response to detection of a pattern of events, or
deviation from a pattern of events. For example, a pattern of
magnetic field strength magnitudes (e.g., a relatively constant
magnetic field strength for a given time, an increasing magnetic
field strength, a decreasing magnetic field strength, etc.) may be
detected by the locate receiver, which may trigger logging of
timing information and/or geographic information. Deviation from a
pattern, such as a historical pattern or expected pattern may also
trigger logging of information. For example, a user's historical
use patterns of a locate receiver may be compared to information
collected about the use of the locate receiver during a given job,
and if a deviation is detected then logging of timing and/or
geographic information may be triggered. The patterns or deviations
from patterns may relate to patterns in magnetic field strength,
magnetic field frequency, signal gain, user operation, any other
information described herein, or any combination of such
information.
[0191] In some embodiments, alternatively or in addition to
"automatic" logging of locate information based on some condition
or event, a user of the locate receiver 110 may "manually" trigger
logging of timing information, geographic information, and/or any
other data associated with a locate operation or locate receiver
(locate information), for example by manipulating a control (e.g.,
button, knob, joystick) of the user interface 126 or, as discussed
above, by actuating an actuator 142 integrated or otherwise
associated with the locate receiver (as shown in FIG. 5), which may
be part of the actuation system 120 and which may cause a signal
121 to be sent to the processor 118 to initiate logging of locate
information. For example, according to some embodiments a user may
initiate the locate receiver 110 taking a depth measurement by
depressing a pushbutton of the user interface 126, or
pulling/squeezing the actuator 142, which may also trigger the
logging of timing information and/or geographic information from
timing system 128 and location tracking system 130. The depth
measurement data, time data, and/or location data may then be
logged in an electronic record 135 in local memory 122.
[0192] It should be appreciated that while the foregoing discussion
focuses on logging locate information to local memory 122, the
locate information may also, or alternatively, be transmitted to
remote computer 150 via communication interface 124. As with
logging locate information to local memory 122, the transmission of
locate information to remote computer 150 may be performed
continuously, periodically in response to one or more types of
events, in response to user input or actuation of an actuator, or
in any other suitable manner.
[0193] In yet other embodiments, the locate receiver 110 may be
configured (e.g., via particular instructions executing on the
processor 118) to operate in multiple different modes to collect
various information relating not only to a locate operation (locate
information), but additionally or alternatively various information
relating to the work site/dig areas in which the locate operation
is performed. For example, in one implementation, the locate
receiver may be configured to operate in a first "locate mode"
which essentially follows various aspects of the operation of the
locate receiver 110 described herein, and also may be configured to
operate in a second "landmark identification mode." When switched
into the landmark mode, the locate receiver may stop detecting a
magnetic field, e.g., the RF antenna of the locate receiver may be
temporarily disabled in some embodiments. In other embodiments, the
locate receiver may continue to operate and the landmark mode may
represent additional functionality added to the locate receiver
functionality. Additional details of the landmark mode are
discussed further below.
III. FORMAT, CONTENT AND PROCESS OF GENERATING ELECTRONIC RECORDS
OF LOCATE Information
[0194] As noted above, locate information may be generated, logged
and/or transmitted by a locate device according to a variety of
manual, semi-automatic, and/or automatic techniques; for example,
in some implementations, a technician may actuate an actuator
(e.g., pull a trigger, push a button) in response to which certain
locate information may be generated, acquired, logged and/or
transmitted. In other implementations, one or more predetermined
conditions may be established (e.g., one or more thresholds,
patterns, etc.) that, when present, may cause generation,
acquisition, logging and/or transmission of locate information.
[0195] In exemplary methods for generating an electronic record of
locate operations according to some embodiments of the invention
pursuant to manual actuation of an actuator (or manipulation of a
user interface control mechanism), as discussed in greater detail
below, for a given actuation the processor 118 may generate an
"actuation data set," e.g., a set of data that is somehow
organized, formatted, and/or indexed to correspond to a given
actuation of the locate receiver. For example, for a given
actuation data set, the processor 118 may request the location
tracking system 130 to provide geographic information at one or
more times during the actuation (e.g., periodically at regular
intervals). Thus, an actuation data set of an electronic record for
a given actuation of the locate receiver may have multiple pieces
of geographic information (and associated time stamps) representing
the location of the locate receiver at multiple times during a
corresponding actuation. Additionally, for a given actuation, the
processor 118 also may request the processing circuit 133 to
provide various locate signal information (e.g., relating to one or
more characteristics of the detected magnetic field) as part of the
actuation data set. The processor also may include in the actuation
data set ticket information and service-related information, which
may be collected (e.g., via one or more of the user interface 126
and the communication interface 124) before a corresponding
actuation, stored in memory 122 and retrieved from the memory for
entry into the electronic record upon or during the corresponding
actuation, or collected and entered into the electronic record upon
or during the corresponding actuation.
[0196] While the collection and logging of locate information to
generate an electronic record is discussed in some aspects, for
purposes of illustration, in terms of actuation data sets (i.e., a
set of data that is associated and logged with a corresponding
actuation of the locate receiver), it should be appreciated that
various embodiments of the present invention are not limited in
this respect. More generally, an electronic record of a locate
operation may be generated in any of a variety of manners, have a
variety of file formats and/or data structures, and include any of
a variety of locate information.
[0197] FIG. 6 is a flow diagram of an exemplary process 600 for
collecting locate information during operation of a locate receiver
110 and generating an electronic record, according to one
embodiment of the present invention. It should be appreciated that
as various locate information is collected and logged in the
process 600, such locate information also may be transmitted from
the locate receiver (e.g., to remote computer 150) to facilitate
essentially real-time monitoring of the locate operation, and/or
remote generation of an electronic record of the locate
operation.
[0198] In block 602 of the process 600 shown in FIG. 6, ticket
information and/or service-related information may be received
(e.g., via one or more of the user interface 126 and the
communication interface 124 of locate receiver 110) and this
information optionally may be stored in whole or in part in local
memory 122 of the locate receiver. The ticket information and/or
service-related information may be received electronically in any
of a variety of formats, and the processor may be configured to
appropriately parse the information for subsequent entry into an
electronic record.
[0199] For example, in some embodiments, the ticket information may
be received as part of an electronic locate request ticket, and
individual respective pieces of ticket information (e.g., ticket
number, work site address information, requesting party, etc.) may
be extracted or derived from the electronic locate request ticket.
In other embodiments, various aspects of ticket information may be
input by a user/technician via the user interface.
[0200] For example, in block 602 the process 600 may provide for
the entry of any of a variety of text information for inclusion in
an electronic record and/or selection by a user/technician (e.g.,
via the user interface) of various information to be included in an
electronic record as part of ticket information (and/or
service-related information). One example of such information may
relate to a ground type in and around the work site/dig area at
which the locate operation is taking place. In some
implementations, a text description of the ground type may be
entered and stored as part of the electronic record. In another
exemplary implementation, the processor 118 controls the user
interface 126 (including display 146) so as to display information
to the technician to facilitate such a selection. In particular, a
ground type selection submenu may be displayed, including one or
more categories of ground types displayed in any of a variety of
manners (e.g., as a list of text entries, an arrangement of icons
symbolizing respective categories, labeled symbols, etc.). Examples
of ground type categories that may be displayed in such a submenu
include, but are not limited to: 1) "Pavement;" 2) "Grass;" 3)
"Rough/Rocky;" 4) "Dirt;" 5) "Gravel/Sand;" and 6) "Other." More
generally, any number and variety of ground type categories may be
presented to the technician via the user interface in
alphabetically ordered lists, numerically ordered lists, or other
types of ordered text-based or symbolic arrangements, for example.
In yet another exemplary implementation, the user interface may
include a microphone and the processor may be configured to accept
and process audible commands, such that a ground type category may
be accomplished via voice-activated commands by simply speaking
into the microphone.
[0201] Similarly, with respect to service-related information, a
user/technician may manually enter some aspects of this information
via the user interface/display, while other aspects may already be
available in other memory locations (e.g., the locate receiver ID
or serial number, a technician ID to which the locate receiver is
assigned or checked-out, etc.) and/or may be received
electronically.
[0202] While block 602 is illustrated as one element of the process
600, it should be appreciated that respective pieces of information
received as input in block 602 may be received at different times
and via different interfaces/sources, and thus may occur at
different points in the process 600. It should also be appreciated
that block 602 is an optional step in the process 600, and that
more generally a process for collecting locate information to
generate an electronic record need not necessarily include
collection of one or both of ticket information and service-related
information.
[0203] In block 604, the locate technician utilizes the user
interface 126 to indicate the initiation of a locate operation. For
example, the technician may press a button, operate a joy-stick, or
touch a touch screen display portion of a graphical user interface
to commence a locate operation. In response, a "job initiation
signal" is provided to the processor 118 (e.g., via a switch
closure and a ground or DC level applied to an I/O pin of the
processor, or by the user interface providing a signal to the
processor) to initiate generation of an electronic record.
Alternatively, a remote job initiation signal may be received by
the processor via the communication interface from another device,
such as the remote computer 150.
[0204] In response to the job initiation signal, in block 606 the
processor opens a file in the memory 122 in which to store the
electronic record 135, and assigns a file identifier to the opened
file. In one example, the file identifier assigned to the opened
file may be or include one or more of a job number ("job ID") or
ticket number derived from the ticket information and/or the
service-related information, an identifier for the locate receiver
itself, and an identifier for a remote computer associated with the
locate receiver (e.g., for either remote control operation of the
device and/or data uploading/downloading). To this end, if ticket
information and/or service-related information is not previously
available (e.g., if no information is received in block 602), the
technician optionally may be prompted to manually enter (e.g., via
a "wizard" or sequence of dialogues germane to obtaining relevant
information displayed on the display of the user interface) various
elements of ticket information and/or service-related information
from which a file identifier may be derived, or provide other
information that may be used as a file identifier.
[0205] A file opened in block 606 for purposes of storing an
electronic record may have any of a variety of formats and include
any of a variety of data structures. In one embodiment, the
processor initially opens up a "flat file" for collection and
logging of locate information to facilitate generation of an
electronic record. As known in the art, a flat file is a plain text
or mixed text/binary file containing one entry (data record) per
line, in which each entry may have multiple fields containing
respective values, and wherein the respective values may be
separated by delimiters (e.g., commas) or have a fixed length. In
one exemplary implementation, the processor 118 logs data into a
flat file opened for the electronic record as a succession of time
stamped "event entries." Some event entries may be related
specifically to actuation and/or logged in response to actuation of
the locate receiver (e.g., the processor 118 receiving an actuation
signal 121), while other event entries may be related to automatic
logging of data as discussed above (e.g., upon meeting or exceeding
a threshold condition, meeting or deviating from a pattern, etc.).
Other event entries may be more generally related in some manner to
overall operation of the locate receiver or the locate operation
itself, but not necessarily associated with one or more particular
actuations (e.g., start/pause/stop locate operation, power/battery
status, communication link/network connection status, etc.), and
these other event entries may be logged at virtually any time (in
some cases irrespective of one or more actuations).
[0206] Accordingly, it should be appreciated that in one aspect of
this embodiment a flat file for an electronic record may contain a
succession of time stamped event entries on respective lines, in
which one or more event entries may have multiple delimited
fields/values, and wherein at least some of the event entries may
relate to actuation of the locate receiver and/or automatic logging
of data. In another aspect, one or more fields/values in a given
event entry may specifically indicate in some manner whether or not
the event is associated with an actuation of the locate receiver.
In general, an "actuation event entry" constitutes an entry in a
file for an electronic record that is in some manner specifically
related to, and/or logged in response to or during, actuation of
the locate receiver, and multiple actuation event entries for a
given actuation constitute an actuation data set for that
actuation. Again, it should be appreciated that a file for an
electronic record may include one or more other event entries that
may not be particularly associated with an actuation.
[0207] In other embodiments, the file for an electronic record may
or may not be a flat file, and event entries associated with
actuations (actuation event entries) may be somehow identified and
differentiated from other event entries that are not associated
with an actuation. For example, a file for an electronic record may
include a particular data structure or format that segregates or
separates in some manner event entries associated with successive
actuations from those event entries that are not particularly
associated with actuations (and/or may be common to multiple
actuations or a group of actuations). In yet other embodiments, as
discussed below, locate information may be initially collected and
logged in a first file for an electronic record in a first format
(e.g., a flat file including a succession of time-stamped event
entries as "raw data" for the locate operation) that may be stored
and/or transmitted for any of a variety of purposes, and then
reformatted and/or reorganized in some manner in one or more
subsequent files (e.g., a file having a particular data structure
that segregates/separates actuation-related information from other
information in different fields/elements of a data structure) for
archiving and/or transmission to one or more other
devices/processors.
[0208] Once a file for an electronic record is opened in block 606,
in block 608 the processor can begin collecting and logging various
locate information, i.e., logging in the electronic record (and/or
transmitting via the communication interface) actuation event
entries and/or other event entries. In one exemplary
implementation, the processor may be programmed so as to poll one
or more input devices and/or other components of the locate
receiver to receive information, either once or multiple
times/periodically following the job initiation signal, and log
responses to these polls ("polling events") as event entries with
associated time stamps. Examples of entries corresponding to
polling events that may be logged into the file for the electronic
record (and/or transmitted) include, but are not limited to, one or
more "power status event entries" including power information
associated with the power source 114, one or more "ticket
information event entries" including ticket information (e.g., as
received from the user interface or the communication interface,
retrieved from local memory, etc.), one or more "service-related
information event entries" including the service-related
information (e.g., as received from the user interface or the
communication interface, retrieved from local memory, etc.), and
one or more "communication interface event entries" including
status information regarding operation of the communication
interface (e.g., network communication available/unavailable).
[0209] Additionally or alternatively, the processor may be
programmed so as to respond to one or more signals designated as
"interrupt events" from one or more components of the locate
receiver. Such interrupt events cause logging of information in the
electronic record (and/or transmission of information)
upon/following the processor detecting the corresponding signal(s).
For example, the "job initiation signal" itself may constitute an
interrupt event, in response to which the processor 118 not only
opens a file for the electronic record but, once the file is
opened, the processor may request timing information from the
timing system 128 and log into the electronic record a "start job
event entry" including a job initiation time stamp associated with
receipt of the job initiation signal.
[0210] In a similar manner, following commencement of a locate
operation, the locate technician may utilize the user interface 126
(e.g., press a button, operate a joy-stick, or touch a touch screen
display portion of a graphical user interface) to pause, restart,
and/or indicate completion of the locate operation, and these
actions may constitute interrupt events. For example, as indicated
in block 610 of FIG. 6, a "pause signal" may be provided by the
user interface to the processor, in response to which the processor
may request timing information from the timing system and log a
"pause job event entry" including a pause job time stamp associated
with the at least one pause signal. When the technician is ready to
continue, as shown in block 612 of FIG. 6 the technician may
indicate this via the user interface and a "restart job event
entry" similarly may be logged. When the locate operation is deemed
by the technician to be completed, as noted in block 614 of FIG. 6
the technician may utilize the user interface so as to provide a
"stop signal" to the processor, in response to which the processor
may request timing information from the timing system and log a
"stop job event entry" including a stop job time stamp associated
with the stop signal.
[0211] Additionally, the locate technician may utilize the user
interface 126 to denote the beginning and end of a locate operation
for a particular facility type, and these actions may constitute
interrupt events. For example, upon beginning a locate operation
for a given facility type, the technician may select "line start"
from the user interface, and a corresponding "line start signal"
may be provided by the user interface to the processor, in response
to which the processor may request timing information from the
timing system and log a "line start event entry." Similarly, when
the technician wishes to indicate completion of the locate
operation for a given facility type, the technician may select
"line stop" from the user interface, and a corresponding "line stop
signal" may be provided by the user interface to the processor, in
response to which the processor may request timing information from
the timing system and log a "line stop even entry."
[0212] While various events are noted above as examples of "polling
events" as opposed to "interrupt events," it should be appreciated
that the inventive concepts discussed herein are not limited in
these respects, and that the locate data algorithm 137 executed by
the processor 118 may be configured in any of a variety manners to
designate various functions performed by and/or information
provided by various components of the locate receiver as polling
events or interrupt events. For example, the power source 114 may
be configured to provide a "low battery signal" to the processor,
which when present is treated by the processor as an interrupt
event that may be logged by the processor and/or that may cause the
processor to take some particular action (e.g., provide an
audible/visible alert; disable logging of further data, etc.). In
one aspect, absent the "low battery signal," the processor may
request status information from the power source once or
occasionally as a polling event. Similarly, the communication
interface 124 may be configured to provide a "no network connection
available signal" to the processor, which when present is treated
by the processor as an interrupt event (that is logged and/or
causes the processor to take some action), and when not present,
the processor may poll the communication interface to request
status information as a polling event.
[0213] Another example of an interrupt event is the automatic
logging of locate information, for example one or more of timing
information, geographic information, and locate signal information
derived from the detection electronics 131. In particular, as
discussed above, automatic logging may occur at periodic intervals
during performance of a locate operation, such as every second,
every five seconds, every minute, or at any other suitable time
interval. Alternatively, timing information, geographic information
and/or locate signal information may be logged when a
characteristic (e.g., magnetic field strength) of a signal detected
by RF antenna 127 is greater than a particular threshold value,
which may be indicated by a signal output from processing circuit
133 to processor 118, and which occurrence may be indicative of the
presence of an underground facility. Similarly, in some
embodiments, timing information, geographic information and/or
locate signal information may be logged when a signal detected by
RF antenna 127 has a magnitude above a first threshold and the gain
of the locate receiver 110 is above a second threshold.
Additionally, as noted above, various locate information may be
logged in response to detection of a pattern of conditions/events,
or deviation from a pattern of conditions/events (e.g., a pattern
of magnetic field strength magnitudes may be detected by the
detection electronics 131, which may cause automatic logging of
timing information, geographic information, and/or locate signal
information).
[0214] Yet another example of an interrupt event is given by the
actuation signal 121 provided by the actuation system 120 upon
actuation of the actuator 142 (i.e., a signal change-of-state
indicating a transition from a non-actuated state to an actuated
state), in response to which the processor logs one or more
actuation event entries in the electronic record. More
specifically, in one implementation, the receipt of a non-actuated
to actuated transition state of the actuation signal 121 by the
processor may cause an initial actuation event entry to be logged
as a "start actuation event entry" having an associated time stamp
(i.e., a start time for the corresponding actuation) and also cause
the processor to subsequently poll one or more input devices for
information during the corresponding actuation and until release of
the actuator (i.e., subsequent change of state of the actuation
signal 121). In this manner, an actuation data set for a given
actuation may include multiple actuation event entries.
[0215] For example, during actuation of the actuator, the processor
may poll the location tracking system 130 so as to receive
geographic information, and in turn log one or more "geo-location
data event entries" in the actuation data set for the corresponding
actuation. As discussed above in connection with FIGS. 4 and 5, in
one exemplary implementation the location tracking system is
configured to provide geographic information at an information
update rate of approximately 5 Hz, and the processor may log
respective updates of geographic information provided by the
location tracking system at this update rate during an actuation as
multiple geo-location data event entries of the actuation data set.
It should be appreciated, however, that methods and apparatus
according to various embodiments of the present invention are not
limited in this respect, and that other geographic information
update rates may be employed in various implementations (e.g.,
update rates of up to approximately 100 Hz), based in part on the
particular location tracking system employed. Furthermore, it
should be appreciated that in some implementations the geographic
information provided by the location tracking system 130 may
include one or more longitude coordinates, latitude coordinates,
and a corresponding geo-location data time stamp at which a given
set of longitude/latitude coordinates are obtained by the location
tracking system; accordingly, a given geo-location data event entry
in an actuation data set may include a longitude coordinate, a
latitude coordinate, and the corresponding geo-location data time
stamp.
[0216] Similarly, in some implementations, pursuant to an interrupt
provided by the actuation signal 121, the processor may
subsequently poll one or more of the timing system 128 and the
detection electronics 131 so as to receive timing information
and/or locate signal information during a corresponding actuation,
and in turn log one or more of a "timing event entry," and a
"locate signal event entry" as part of the actuation data set. Any
of a variety of locate signal information as discussed above may be
collected and logged during actuation in response to processor
polling of the detection electronics 131.
[0217] Additionally, in some implementations, pursuant to an
interrupt provided by the actuation signal 121, the processor may
subsequently poll one or more of the user interface 126, the
communication interface 124, and the local memory 122 to retrieve
ticket information and/or service-related information for logging
into an actuation data set. As discussed above, in some
implementations the receipt/retrieval of ticket information and/or
service-related information may be treated as a polling event not
necessarily associated with actuations, and this information need
not be included in one or more actuation data sets. However, in
other implementations it may be desirable to include at least some
aspect of ticket information and/or service related information in
each actuation data set, notwithstanding the possible redundancy of
data content in respective actuation data sets.
[0218] Another example of an interrupt event is given by a
change-of-state of the actuation signal 121 indicating a transition
from the actuated state to the non-actuated state, i.e., release of
the actuator 142. In response to this event, the processor may
request information from the timing system 128 and log an "end
actuation event entry" including an end time stamp.
[0219] In yet another embodiment, the processor 118, executing
locate data algorithm 137, may be configured to
repeatedly/regularly poll all available input devices and other
components of the locate receiver (e.g., in a predetermined order,
in response to receipt of the job initiation signal), as well as
continually monitor for a variety of possible interrupt events, and
generate an essentially continuous stream of data packets including
locate information received pursuant to these polling and/or
interrupt events. In one aspect of this embodiment, each data
packet of locate information may include a header, one or more flag
fields, and one or more information payload fields. For example, in
one implementation, the header for each packet may include one or
more of a job ID (e.g., ticket identifier), technician ID, device
ID (e.g., serial number), packet type ID, and/or a time stamp
corresponding to logging of information/generation of the packet.
Each packet also may include one or more payload fields for
carrying information provided by the polled device(s) or devices
generating interrupts, and one or more flag fields that are set (or
reset) upon occurrence of one or more predetermined interrupt
events (e.g., pull/depress actuator, release actuator, automatic
log due to some condition/event, low power, communication link
fail, etc.). In this manner, a continuous stream of data may be
provided as an output by the processor, in which certain interrupt
events, such as an actuation and/or release of the actuator, or
automatic logging of data, "tag" certain data packets via an
interrupt flag. In yet other aspects of this embodiment, all data
packets thusly generated may be stored in the file opened for the
electronic record and/or transmitted from the locate receiver in
essentially real time; alternatively, only certain data packets
with one or more predetermined flags set may be stored and/or
transmitted.
[0220] Table 1 below illustrates an example of a portion of the
contents of a relatively simple flat file for an electronic record
that may be generated by the process 600 of FIG. 6:
TABLE-US-00002 TABLE 1 TIME LAT LONG EVENT FACILITY TYPE 1:23:00.00
PM -80.3851 25.5604 Detection ORANGE 1:23:00.20 PM -80.3851 25.5604
Detection ORANGE 1:23:00.40 PM -80.3851 25.5604 Detection ORANGE
1:23:00.60 PM -80.3851 25.5604 Detection ORANGE 1:23.00.80 PM
-80.3851 25.5604 Detection ORANGE 1:23:01.00 PM -80.3851 25.5604
Detection ORANGE 1:23:01.20 PM -80.3851 25.5604 Detection ORANGE
1:23:01.40 PM -80.3851 25.56039 Detection ORANGE 1:23:01.60 PM
-80.3851 25.56039 Detection ORANGE 1:23:01.80 PM -80.3851 25.5604
Detection ORANGE 1:23:02.00 PM -80.3851 25.5604 Detection
ORANGE
[0221] The portion of the file shown in Table 1 corresponds to
multiple locate signal event entries indicating detection of a
facility (one entry per line). Each entry has a time stamp (e.g.,
entries are logged at a rate of approximately five events per
second) and further includes multiple fields having respective
values (e.g., as comma separated values) for latitude and longitude
coordinates received from the location tracking device, an event
indicator indicating that the locate receiver is detecting
("Detection"), and a color code indicating the type of facility
detected (e.g., as established by the American Public Works
Association and shown further below in Table 7).
[0222] As noted above, it should be appreciated that the portion of
the file shown in Table 1 is provided primarily for purposes of
illustration, and that the format and/or content for respective
event entries and the file itself for an electronic record
generated by and/or based on the information collection process
discussed above in connection with FIG. 6 may have any of a variety
of different formats and/or content.
[0223] To this point, Tables 2 through 5 below provide examples of
various events for which event entries may be logged in a file for
an electronic record and/or transmitted by the locate receiver,
exemplary formats for these event entries, and exemplary file
formats for files having multiple such entries, according to
another embodiment of the present invention.
[0224] Job Started/Paused/Restarted/Completed Events: This event
entry format provides information about when a locate operation
("job") is started and completed in addition to capturing details
about if and when the job was paused and restarted.
TABLE-US-00003 TABLE 2 Format INFO+JOBS: (DATE) (TIME) (DEV_ID)
(JOB_ID) (STATE) <CR><LF> Examples INFO+JOBS:
DATE(2009-04-15) TIME(12:03:44) DEV(2334) JOB(4000) (STARTED)
<CR> <LF> INFO+JOBS: DATE(2009-04-15) TIME(12:11:44)
DEV(2334) JOB(4000) (PAUSED) <CR> <LF> INFO+JOBS:
DATE(2009-04-15) TIME(12:51:44) DEV(2334) JOB(4000) (RESTARTED)
<CR> <LF> INFO+JOBS: DATE(2009-04-15) TIME(13:09:44)
DEV(2334) JOB(4000) (END) <CR> <LF>
[0225] Actuation Events: As has been described, according to at
least one embodiment of the present invention, a locate receiver
may be operated to collect and/or transmit locate information upon
actuation by a user. Table 3 illustrates an example of an entry
relating to the actuation event. Locate information from one or
more input devices/other components of the locate device may be
recorded upon actuation to provide information about the job in
progress. The facility type information may be entered/selected by
a user as described previously, and may be recorded in the event,
for example, according to the color-coding scheme of Table 7
discussed further below.
TABLE-US-00004 TABLE 3 Format INFO+ LCTR: (DATE) (TIME) (GPS data)
(FACILITY TYPE) (GROUND TYPE) (MAGNETIC FIELD STRENGTH AS % OF FULL
SCALE info) (DETECTED SIGNAL FREQUENCY) (GAIN) <CR><LF>
Examples INFO+LCTR: DATE(2009-04-15) TIME(12:04:44)
GPS($GPGGA,120443,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
) FACILITY TYPE (YELLOW) GROUND TYPE (PAVEMENT) STRENGTH(80)
FREQUENCY(512) GAIN (10) <CR><LF> INFO+LCTR:
DATE(2009-04-15) TIME(12:04:45)
GPS($GPGGA,120445,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
) FACILITY TYPE (YELLOW) GROUND TYPE (GRASS) STRENGTH(81) FREQUENCY
(512) GAIN (10) <CR><LF> INFO+LCTR: DATE(2009-04-15)
TIME(12:04:46)
GPS($GPGGA,120446,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
) FACILITY TYPE (YELLOW) GROUND TYPE (DIRT) STRENGTH(80)
FREQUENCY(512) GAIN (11) <CR><LF>
[0226] Locate Device Status Events: The status event of a locate
device collects various locate-related information and/or
information on operating characteristics of the locate device on a
periodic basis while a job is in progress (e.g., pursuant to
processor polls). An example is shown below in Table 4. In the
non-limiting example, the entries include information about the
mode of the locate receiver (e.g., peak v. null). It should be
appreciated, however, that other information may additionally or
alternatively be included in the event entry.
TABLE-US-00005 TABLE 4 Format INFO+LCTSTAT: (DATE) (TIME) (GPS
data) (MODE status) (MEMORY used in %) (BATTERY level)
<CR><LF> Examples INFO+LCTSTAT: DATE(2009-04-15)
TIME(12:04:00)
GPS($GPGGA,120400,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
) MODE(PEAK) MEM(65) BAT(3)<CR><LF>
[0227] Error Events: Should any input device or other component of
the locate device encounter a significant error condition, this may
be logged as an event. In some cases, the user/technician also may
be notified of the error through the user interface 126 (visible
alert on display, audible alarm/alert, etc.). Similar event formats
may be adopted for warning alerts/events and informational
alerts/events.
TABLE-US-00006 TABLE 5 Format INFO+ERR: (DATE) (TIME) (GPS data)
(MEMORY used in %) (BATTERY level) <CR><LF> Examples
INFO+ERR: DATE(2009-04-15) TIME(12:04:00)
GPS($GPGGA,120400,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
) MEM(65) BAT(3)<CR><LF>
[0228] It should be appreciated that the event types described
above and the logged location information shown in the
corresponding tables are provided primarily for purposes of
illustration, and are not limiting. Thus, events of various other
types and with various other information may be logged into an
electronic record.
[0229] With respect to file formats for electronic records
including the event entries outlined above in Tables 2 through 5,
two exemplary file formats, namely ASCII and XML, are provided
below for purposes of illustration. In various implementations, a
given locate receiver may be particularly configured to store
and/or transmit electronic records and respective entries therein
in either format (or other formats). With respect to identification
of files/electronic records, a standard naming scheme/format may be
adopted, for example, including an identifier for the remote
computer with which the locate receiver may be communicating
("ServerID"), an identifier for the locate receiver itself
("LocRecID"), and an identifier for the locate operation/job
("JobID"), and having the format "ServerID_LocRecID_Job ID."
[0230] ASCII Data Format: This format allows low-level remote
processing engines to quickly and easily receive, parse, and react
to locate information logged and/or transmitted by the locate
receiver. An example of an electronic record formatted in ASCII
based on the event entries outlined in Tables 2 through 5 is as
follows:
TABLE-US-00007 INFO+JOBS: DATE(2009-04-15) TIME(12:03:44) DEV(2334)
JOB(4000) (STARTED) <CR> <LF> INFO+LCTSTAT:
DATE(2009-04-15) TIME(12:04:00)
GPS($GPGGA,120400,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
) MODE(PEAK) MEM(65) BAT(3)<CR><LF> INFO+LCTR:
DATE(2009-04-15) TIME(12:04:44)
GPS($GPGGA,120443,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
) FACILITY TYPE (YELLOW) GROUND TYPE (PAVEMENT) STRENGTH(80)
FREQUENCY(512) GAIN (10) <CR><LF> INFO+LCTR:
DATE(2009-04-15) TIME(12:04:45)
GPS($GPGGA,120445,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
) FACILITY TYPE (YELLOW) GROUND TYPE (GRASS) STRENGTH(81) FREQUENCY
(512) GAIN (10) <CR><LF> INFO+LCTR: DATE(2009-04-15)
TIME(12:04:46)
GPS($GPGGA,120446,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
) FACILITY TYPE (YELLOW) GROUND TYPE (DIRT) STRENGTH(80)
FREQUENCY(512) GAIN (11) <CR><LF> INFO+LCTSTAT:
DATE(2009-04-15) TIME(12:05:00)
GPS($GPGGA,120500,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
) MODE(PEAK) MEM(65) BAT(3)<CR><LF> INFO+JOBS:
DATE(2009-04-15) TIME(12:10:03) DEV(2334) JOB(4000)
(PAUSED)<CR> <LF> INFO+JOBS: DATE(2009-04-15)
TIME(13:01:43) DEV(2334) JOB(4000) (RESTARTED)<CR> <LF>
INFO+JOBS: DATE(2009-04-15) TIME(13:20:30) DEV(2334) JOB(4000)
(END)<CR> <LF>
[0231] XML Data Format: This format allows transmission of
self-describing data elements from the locate receiver, in some
instances reducing processing errors and reducing the risks and
effort involved in upgrades and data changes. An example of an
electronic record formatted in XML based on the event entries
outlined in Tables 2 through 5 is as follows:
TABLE-US-00008 <DEV ID=2334> <JOB ID=4000>
<ACTIVITY> <DATE>2009-04-15</DATE>
<TIME>12:03:44</TIME>
<STATUS>Started</STATUS> </ACTIVITY>
<ACTIVITY> <DATE>2009-04-15</DATE>
<TIME>12:04:00</TIME> <GPS>($GPGGA,
120400,4807.038,N,01131.000,
E,1,08,0.9,545.4,M,46.9,M,,*47</GPS> <FACILITY TYPE>
<COLOR>Yellow</COLOR> <VALID>True</VALID>
</FACILITY TYPE> <SWITCH>Pressed</SWITCH>
</ACTIVITY> </JOB> </DEV>
[0232] Table 6, shown below, lists another example of the contents
of an electronic record of locate information that may be generated
and stored and/or transmitted relating to operation of a locate
receiver, according to one non-limiting embodiment. The electronic
record shown in Table 6 includes a record number (record #1001), an
identification of the service provider, an identification of the
user (i.e., the locate technician operating the locate receiver),
and an identification of the locate receiver. The mode of operation
of the locate receiver (e.g., peak, and in some scenarios an
indication of active or passive operation) may also be included.
Timing information (timestamp data) from a timing system of the
locate receiver and geographic information from a location tracking
system of the locate receiver may also be included. The signal
strength and signal frequency entries of the electronic record
indicate characteristics of a signal (e.g., a magnetic field)
detected by the locate receiver, for example emitted from an
underground facility. The signal strength is listed in the example
of Table 6 as a percentage of the maximum detectable by the locate
receiver, although it should be appreciated that other units of
measurement may alternatively be used. The gain entry indicates the
gain setting of the locate receiver. The electronic record also
includes an entry for the depth of the facility targeted, as may be
determined by taking a depth measurement using a locate receiver
(e.g., by calculating a difference in magnetic field strength
detected by two different antennae at two different locations
within a locate receiver), and for the facility type (e.g., gas,
electric, etc.) and ground type in the area of the locate
operation. The electronic record of Table 6 also includes the
address of the locate operation and the party requesting the locate
operation. Lastly, Table 6 includes information about the remaining
battery life of the locate receiver for those embodiments that
include a battery.
TABLE-US-00009 TABLE 6 Example Electronic Record For Locate
Receiver Record Service provider ID 0482 # 1001 User ID 4815
Receiver ID 7362 Receiver mode Mode=Peak Receiver mode PASSIVE
Timestamp data 12-Jul-2008; 09:35:15 Geo-location data
2650.9348,N,08003.5057,W Signal strength (% of 85% maximum) Gain 45
Signal frequency 1 kHz Facility depth 3.4 meters Facility type Gas
(yellow) Ground type Pavement Battery strength data 85% Locate
request data Requestor=XYZ Construction Company, Requested service
address=222 Main St, Orlando, FL
[0233] It should be appreciated that Table 6 represents only one
non-limiting example of an electronic record of locate information
which may be generated in accordance with the operation of a locate
receiver, according to one embodiment. In particular, a single
electronic record of locate information collected in connection
with operation of a locate receiver may include multiple entries of
a given data type. For example, while Table 6 illustrates an
electronic record including a single GPS data point, it should be
appreciated that multiple GPS data points may be taken and stored
within a single electronic record. The multiple GPS data points may
be taken in response to a single actuation event (e.g., single
actuator pull by a technician), in response to multiple actuation
events (e.g., multiple actuator pulls by a technician), or in other
manners. Thus, multiple pieces of data may be collected for an
electronic record of a locate operation, and it should be
appreciated that any single electronic record may include multiple
entries.
[0234] With regard to color information that may be included in any
of the event entries and electronic records discussed herein, Table
7 below shows an example of a color code used to identify
facilities to be detected during a locate operation.
TABLE-US-00010 TABLE 7 Correlation of color to facility type Color
Code Facility Type Red Electric power lines, cables or conduits,
and lighting cables Yellow Gas, oil, steam, petroleum, or other
hazardous liquid or gaseous materials Orange Communications, cable
television, alarm or signal lines, cables, or conduits Blue Water,
irrigation, and slurry lines Green Sewers, storm sewer facilities,
or other drain lines White Proposed excavation Pink Temporary
survey markings Purple Reclaimed water, irrigation, and slurry
lines Black Mark-out for errant lines
[0235] FIG. 7 illustrates an exemplary data structure for an
electronic record 135, according to another embodiment of the
present invention, that may be generated by and/or based on
information collected during the process 600 discussed above in
connection with FIG. 6. In the exemplary data structure of FIG. 7,
information is arranged in terms of actuation data sets, to
illustrate the storage of data pursuant to actuations of a locate
receiver. It should be appreciated however, that data structures
similar to that shown in FIG. 7 may be generated and/or based, at
least in part, on automatic logging of various locate information,
as discussed above.
[0236] As shown in FIG. 7, the record 135 includes a file
identifier 701 (e.g., one or more of Job ID, LocRecID, ServerID,
etc.) and a plurality of actuation data sets 1 through N (with
reference numbers 702A, 702B, 702C . . . 702N), wherein each
actuation data set is associated with a corresponding actuation of
a locate receiver. For purposes of the following discussion, FIG. 7
shows additional details of the data structure for actuation data
set 3 702C, showing several fields in which data (e.g., actuation
event entries) may be entered to constitute the actuation data set.
While only the exemplary details of the data structure of actuation
data set 3 are shown in the electronic record 135 of FIG. 7, it
should be appreciated that multiple actuation data sets of the
electronic record 135 may have the same data structure as that
shown for actuation data set 3 in FIG. 7.
[0237] The data structure of the actuation data set 3 702C of the
electronic record 135 shown in FIG. 7 includes a start location
field 704 (corresponding to geo-location data shown in Table 2 when
an actuator is pressed), an end location field 713 (corresponding
to geo-location data shown in Table 2 when an actuator is
released), a start time field 706 (corresponding to timestamp data
shown in Table 2 when an actuator is pressed), an end time field
708 (corresponding to timestamp data shown in Table 2 when an
actuator is released) and a duration field 709 (corresponding to
the duration of the actuator being held). Additionally, the data
structure for entry 3 702C includes one or more fields 712A, 712B,
. . . 712N for intermediate location data (e.g., corresponding to
1.sup.st interval location data, 2.sup.nd interval location data .
. . Nth interval location data which may be acquired while the
actuator is being held). The actuation data set also may include a
locate signal information field 710 including various data relating
to one or more signals (e.g., corresponding to signal strength,
gain, frequency, as shown in Table 6). Finally, the data structure
for the entry 3 702C may include one or more ticket information
fields 714 (e.g., corresponding to Locate request data in Table 6)
and one or more service-related information fields 716 (e.g.,
corresponding to Service provider ID, User ID, and Receiver ID in
Table 6).
[0238] In addition to one or more actuation data sets corresponding
to actuations of a locate receiver, the electronic record 135 shown
in FIG. 7 may include one or more additional elements. For example,
FIG. 7 shows an additional element 718 of the electronic record to
store the total number of entries in the record. Furthermore,
according to another embodiment, various other information that may
be common to multiple (or all) actuation data sets of a given
electronic record may be stored in one or more additional elements
of the electronic record that are not contained within one or more
of the actuation data sets themselves. For example, in one
alternative implementation, one or more of the ticket information
field 714, the service-related information field 716, and the
locate signal information field 710, which are shown as part of the
data structure for a given actuation data set of the electronic
record, may instead be elements of the electronic record that are
not included within any one actuation data set (e.g., the
information contained in one or more of the ticket information
field, the service-related information field, and the locate signal
information field 710 may be common to all actuation data sets of a
given electronic record).
IV. LANDMARK IDENTIFICATION MODE
[0239] In yet another embodiment of the present invention, a locate
device such as the locate receiver 110 shown in FIGS. 4 and 5 (as
well as a locate transmitter) may be configured (e.g., via
particular instructions included in the locate data algorithm 137
executing on the processor 118, and/or various hardware
modifications) to operate in multiple different modes so as to
collect various information relating not only to a locate operation
itself (locate information), but additionally (or alternatively)
various information relating to the work site/dig area in which the
locate operation is performed. For example, in one implementation,
the locate receiver may be configured to operate in a first "locate
mode" which essentially follows various aspects of the process
outlined in FIG. 6, and also operate in a second "landmark
identification mode" (or more simply "landmark mode"), in which the
locate receiver acquires information relating to one or more
environmental landmarks that may be germane to the locate operation
(e.g., in and around the work site/dig area and/or generally in the
vicinity of the locate operation).
[0240] More specifically, in a "locate mode," various locate
information may be collected, logged, stored and/or transmitted, as
discussed above, in connection with the detection of a presence or
absence of one or more underground facilities. Alternatively, in a
"landmark mode," a technician positions the locate receiver
proximate to an environmental landmark of interest and, upon
actuation of the locate receiver (e.g., via an actuator or
manipulation of a user interface control mechanism), the locate
receiver collects various information about the landmark (hereafter
referred to as "landmark information"), which information may
include, but is not limited to, geo-location data of an
environmental landmark, type of environmental landmark, and a time
stamp for any acquired information relating to an environmental
landmark.
[0241] With respect to mode selection, the locate receiver may be
configured (e.g., via execution of the locate data algorithm) to
provide for mode selection in any of a number of manners. For
example, in one implementation, the locate receiver may be equipped
with a simple switch, referred to as a "mode selection switch,"
which in some instances may form part of the user interface 126.
The switch may include an open contact state and a closed contact
state, wherein one contact is electrically coupled to a power
signal or to ground, and another contact is electrically coupled to
an input of the processor 118; in this manner, when the switch is
toggled, a mode signal may be provided to the processor 118 as an
interrupt event to indicate "landmark mode." In response to the
mode signal indicating landmark mode, the processor 118 may request
timing information from the timing system and log into an
electronic record a "landmark mode event entry" including a
landmark mode time stamp associated with the landmark mode signal.
Additionally, or alternatively, the processor may respond to the
landmark mode signal by taking one or more other actions pursuant
to execution of a portion of the locate data algorithm 137
including particular instructions to implement the landmark mode,
such as providing for the selection of landmark categories and/or
types (via the user interface 126 and menus provided on the display
146), and logging actuation event entries in an electronic record
as "landmark event entries."
[0242] Again, as noted above, such a mode selection switch may be
provided by the user interface 126, for example, in the form of a
button, switch, portion of the touch screen display, microphone to
provide for voice-activation, etc. Apart from a hardware switch,
the user interface 126 alternatively may be employed for mode
selection between locate mode and landmark mode; in particular, the
user interface 126 and/or display 146 may implement a menu-driven
GUI to provide for mode selection.
[0243] FIG. 8 is a flow diagram of an exemplary process 800,
according to one embodiment of the present invention, for operating
a locate receiver having a locate mode and a landmark mode so as to
collect locate information and/or environmental landmark
information during operation of the locate receiver, and generate
an electronic record of such information. Several aspects of the
process 800 shown in FIG. 8 are substantially similar or identical
to those discussed above in connection with FIG. 6; in particular,
blocks 602 through 614 are the same in both FIGS. 6 and 8, and the
blocks 616, 618, and 620 in FIG. 8 are additional aspects of the
process 800.
[0244] In the process 800 outlined in FIG. 8, following
commencement of a locate operation the locate technician may
utilize the user interface 126 (e.g., press a button, operate a
joy-stick, touch a touch screen display portion of a graphical user
interface, speak into a microphone to provide a voice-activated
command, etc.) to not only pause, restart, and/or indicate
completion of the locate operation, but further to select a
landmark mode of operation for the locate receiver. As noted above
in the discussion of FIG. 6, any one or more of these actions may
constitute interrupt events. For example, as indicated in block 616
of FIG. 8, if a technician selects "landmark mode" via the user
interface, the user interface may provide a "landmark mode signal"
to the processor. In response to this signal, the processor may
request timing information from the timing system and log a
"landmark mode event entry" including a landmark mode time stamp
associated with the landmark mode signal. Additionally, or
alternatively, the processor may respond to the landmark mode
signal by taking one or more other actions pursuant to execution of
a portion of the locate data algorithm 137 including particular
instructions to implement the landmark mode (as discussed above,
the landmark mode may be entered in alternative implementations via
a mode signal provided to the processor 118 by a dedicated mode
selector switch.
[0245] Table 8 below provides an example of content and format for
a mode select event entry that may be logged in a file for an
electronic record and/or transmitted by the locate receiver. The
example mode select event entry shown below in Table 8 follows a
similar format to that used for the event entry examples provided
in Tables 2-5 above.
TABLE-US-00011 TABLE 8 Format INFO+MODE: (DATE) (TIME) (DEV_ID)
(JOB_ID) (MODE) <CR><LF> Examples INFO+MODE:
DATE(2009-04-15) TIME(12:03:44) DEV(2334) JOB(4000) (LANDMARK)
<CR> <LF>
[0246] In the process outlined in FIG. 8, subsequent to selection
of the landmark mode, as noted in block 618 the process may provide
for the selection of a particular category and/or type of landmark
for which information is to be collected. To this end, in one
implementation the processor 118 controls the user interface 126
(including display 146) so as to display information to the
technician to facilitate such a selection. In particular, a
landmark selection submenu may be displayed, including one or more
categories of landmarks displayed in any of a variety of manners
(e.g., as a list of text entries, an arrangement of icons
symbolizing respective categories, labeled symbols, etc.). Examples
of landmark categories that may be displayed in such a submenu
include, but are not limited to: 1) "Natural Gas;" 2)
"Water/Sewer;" 3) "Power Line;" 4) "Phone Line;" 5) "CATV Line;"
and 6) "Other."
[0247] Upon selection via the user interface of one of the landmark
categories displayed on the submenu, the processor may control the
user interface so as to display yet another submenu indicating
various types of landmarks that fall within the selected category,
so as to facilitate selection of a particular type of landmark for
which information is to be collected. Examples of types of
landmarks that may be displayed and available for selection via the
user interface, for each of the above identified categories,
include, but are not limited to: [0248] Natural Gas: 1) Service
Meter; 2) Manifold; 3) Test Station; 4) Regulator Station; 5)
Vent/Vent stack; 6) Valve; 7) Trace Wire; 8) Anode; 9) Branch
Service; 10) Capped Service; 11) Compressor Station; 12) Farm Tap;
13) Service Regulator; 14) Service Line; 15) Service Riser; 16)
Shut Off Valve; 17) Tee; 18) Valve Box; 19) Transmission Pipeline;
20) Main/Distribution Main; 21) Offset; 22) Low Pressure; 23)
Medium Pressure; 24) High Pressure [0249] Water/Sewer: 1)
Transmission Main; 2) Water Main; 3) Manhole; 4) Valve; 5) Clean
out; 6) Sewer Lateral; 7) Water Meter; 8) Storm Sewer 9) Sanitary
Sewer; 10) Pump Station; 11) Tap; 12) Faucet; 13) Fire Hydrant; 14)
Tracer Wire [0250] Power Line: 1) Pole; 2) Anchor; 3) Transformer;
4) Manhole; 5) Handhole; 6) Street light; 7) Electrical Riser; 8)
Primary; 9) Secondary; 10) Switch; 11) Fused Switch; 12) Circuit
Breaker; 13) Duct; 14) Power Plant; 15) Transmission Substation;
16) Power Substation; 17) Service Line; 18) Meter; 19) Pedestal;
20) Switch Gear; 21) Switch Cabinet; 22) Buried Transformer; 23)
Riser; 24) Red Top Tracer [0251] Phone Line: 1) Pole; 2) Anchor; 3)
Manhole; 4) Handhole; 5) Subscriber Line Carrier; 6) Digital Loop
Carrier; 7) Remote Terminal; 8) Cross Box; 9) Continual environment
Vault; 10) Fiber Optics; 11) Encapsulated Plant; 12) Building
Terminal; 13) Terminal; 14) Aerial; 15) Buried; 16) Underground;
17) Duct Run; 18) Central Office; 19) Buried Joint; 20) Splice
[0252] CATV Line: 1) Pole; 2) Anchor; 3) Headend; 4) Manhole; 5)
Handhole; 6) Transmitter; 7) Fiber Transmitter; 8) Receiver; 9)
Fiber Receiver; 10) HUB Location; 11) Power Supply/Inserter; 12)
Fiber Node; 13) Amplifier; 14) Ped; 15) Dog House; 16) Subscriber
Service Line; 17) Trunk Station; 18) Trunk Line Amplifier; 19) AC
Power Supply Pedestal [0253] Other: various natural, architectural,
or infrastructure-related landmarks, such as buildings, curbs,
"tagged" curbs (intentionally marked curbs that are likely to
survive excavation, to serve as points of reference to validate
marking operations), streets, driveways, property boundaries, trees
and other landscape elements, termination points of abandoned
facilities, etc.
[0254] While the foregoing discussion of landmark categories and
types provides one construct in which a wide variety of landmarks
are made available for selection by the technician, it should be
appreciated that in other implementations, options for landmark
selection may be presented in different manners. For example, a
more succinct list of landmark types may be presented to the
technician to facilitate easy selection (e.g., a more limited set
of about a dozen more common landmark types that might be
encountered in the field, such as "telephone pole," "fire hydrant,"
"meter," "manhole," "curb," etc.). More generally, any number and
variety of landmark types may be presented to the technician via
the user interface in alphabetically ordered lists, numerically
ordered lists, or other types of ordered text-based or symbolic
arrangements, for example.
[0255] In another exemplary implementation, the categories and/or
types of landmarks made available for selection via the user
interface may be based at least in part on a type of facility being
located when the locate receiver was in a locate mode prior to
selection of the landmark mode. For example, consider a technician
using the locate receiver in the locate mode and in the process of
locating a power line. In one implementation, upon switching to
landmark mode, the user is first presented with selection options
for landmark category and/or type that are more closely related to
a power line (e.g., a more limited subset of option types including
"pole," "transformer," "pedestal," etc.). In one aspect, the
technician may nonetheless still have the option to select other
categories and/or types of landmarks, but as a default the
technician is first presented with options related to the type of
facility last being located. In another aspect, the selection
options for landmark category and/or type may be specifically and
intentionally limited to those options that are most germane to the
type of facility last being located in the previous locate mode
(i.e., immediately prior to entry into the landmark mode).
[0256] In yet another exemplary implementation, the user interface
may include a microphone and the processor may be configured to
accept and process audible commands, such that landmark category
and/or type selection may be accomplished via voice-activated
commands. For example, once landmark mode is selected, the
technician may select a particular landmark category or type by
simply speaking into the microphone (e.g., "telephone pole," "fire
hydrant," "meter," "manhole," "curb," etc.).
[0257] In addition to, or as an alternative to, selection of
landmark category and/or type, block 618 may provide for the entry
of any of a variety of text information for inclusion as part of
the landmark information in an electronic record. For example, in
some exemplary implementations, via the user interface and/or
display the technician may enter text-based information relating to
an environmental landmark (e.g., as an offset to another
topological, architectural, or infrastructure feature in proximity
to the environmental landmark--"telephone pole 5 ft. from back of
curb"). Additionally, in a manner similar to landmark type
selection, the user interface/display may provide for menu-driven
selection via a GUI of predetermined options for additional
text-based information to be included as part of the landmark
information (e.g., a set of "stock" text messages for selection to
be included as part of landmark information).
[0258] Following selection of landmark category and/or type, and/or
entry/section of any text-based information in block 618 of the
process 800 shown in FIG. 8, in block 620 actuations of the
actuator 142 in landmark mode cause the processor to collect
various "landmark information" with each actuation, which
information is logged in an electronic record as a "landmark event
entry" (rather than an actuation event entry, as noted in Table 3
above). Essentially, in landmark mode, the technician positions the
locate receiver proximate to a selected category/type of landmark
and actuates the actuator (or manipulates a designated user
interface control mechanism) to acquire various information
relating to the landmark (e.g., geo-location data, type, time
stamp).
[0259] In general, the processor may be configured to communicate
with (e.g., poll) any of a variety of input devices to collect
landmark information to be logged in an electronic record. As
discussed above in connection with the locate mode (refer again to
FIG. 4), such information may be acquired from any of a variety of
input devices including, but not limited to, the location tracking
system 130, the timing system 128, the communications interface 124
(e.g., a USB port or other port), the user interface 126, and the
local memory 122.
[0260] In particular, any data that is available from the location
tracking system (e.g., any information available in various NMEA
data messages, such as coordinated universal time, date, latitude,
north/south indicator, longitude, east/west indicator, number and
identification of satellites used in the position solution, number
and identification of GPS satellites in view and their elevation,
azimuth and SNR values, dilution of precision values) may be
collected as landmark information and logged in an electronic
record as part of a landmark event entry. Additionally, information
collected from the user interface in the form of a text entry by
the technician may be included in a landmark event entry; for
example, in one implementation, upon actuation of the actuator, the
processor may prompt the technician via the display of the user
interface to enter text notes, if desired (e.g., the technician may
describe an offset of a target environmental landmark from an
architectural, topographical, or infrastructure feature to
compliment geographic information provided by the location tracking
system), and this textual information may serve as landmark
information. In view of the foregoing, it should be appreciated
that "landmark information" may include a wide variety of
information components including, but not limited to, one or more
of geographical information (e.g., from the location tracking
system), timing information (e.g., from the location tracking
system and/or the timing system), landmark category and/or type
information (e.g., selected or entered via the user interface),
textual information (e.g., entered via the user interface), or
other information (e.g., received from the local memory and/or the
communications interface).
[0261] Table 9 below provides an example of content and format for
a landmark event entry that may be logged in a file for an
electronic record and/or transmitted by the locate receiver when in
landmark mode. The example landmark event entry shown below in
Table 9 also follows a similar format to that used for the event
entry examples provided in Tables 2-5 above.
TABLE-US-00012 TABLE 9 Format INFO+LMRK: (DATE) (TIME) (GPS data)
(CATEGORY, TYPE)(TEXT) <CR><LF> Examples INFO+LMRK:
DATE(2009-04-15) TIME(12:04:44) GPS($GPGGA, 120443, 4807.038, N,
01131.000, E, 1, 08, 0.9, 545.4, M, 46.9, M,, *47) LMRK(3,
12)("Panel mounted rear wall of shed")<CR><LF>
[0262] In the example landmark event entry given in Table 9, the
landmark information includes a time stamp (e.g., DATE and TIME),
geographical information (e.g., GPS data), category/type
information, and text-based information for an environmental
landmark. The notation LMRK (3,12) in the example denotes a
category 3, type 12 landmark which, in the exemplary listings
provided above, corresponds to "Power Line," "Circuit Breaker." It
should be appreciated that the event entry shown in Table 9 is
provided primarily for purposes of illustration, and that a variety
of other or additional landmark information may be included in
landmark event entries, as noted above.
[0263] As with the event entry examples provided in Tables 2-5
above, the exemplary format for a mode select and landmark event
entry as shown in Tables 8 and 9 may be included in either an ASCII
and XML file format for an electronic record that is stored and/or
transmitted by the locate receiver (in which a particular naming
scheme/format may be adopted to identify files/electronic records,
such as "ServerID_LocRecID_Job ID"). It should also be appreciated
that an electronic record generated by a multi-mode locate receiver
in some instances may include a mixture of actuation event entries
and landmark event entries, actuation event entries without any
landmark event entries, and landmark event entries without any
actuation event entries.
[0264] Yet another alternative format for storing and organizing
landmark information in an electronic record, according to one
embodiment of the invention, is shown in Tables 10 and 11 below. By
way of example, Table 10 shows the format and content of an
electronic record entry for a utility pole, which includes one
geo-location data point, and Table 11 shows the format and content
of an electronic record entry for a pedestal, which includes four
geo-location data points (i.e., one for each corner of the
pedestal). It should be appreciated that the format and content
shown below in Tables 10 and 11 is provided primarily for purposes
of illustration and, as noted above, a variety of format and
content may be included in an electronic record entry for landmark
information. The examples provided in Tables 10 and 11 may
constitute an "original" electronic record generated by the
processor pursuant to the process 800 shown in FIG. 8, or may be
derived from raw data collected and logged pursuant to the process
800 (e.g., as a flat file, an ASCII formatted file, or an XML
formatted file) and subsequently reorganized and particularly
formatted. It should also be appreciated that the examples provided
in Tables 10 and 11 illustrate that landmark information may be
included in an electronic record together with one or both of
ticket information and service-related information, as discussed
above in connection with electronic records including various
locate information.
TABLE-US-00013 TABLE 10 Example record of data acquired for a
utility pole while in landmark identification mode of operation
Record Service provider ID 0482 # 1 User ID 4815 Device ID 7362
Type of EL Type = utility pole timestamp data 12-Jul-2008;
09:35:17.5 geo-location data 2650.9256, N, 08003.5234, W Other info
(text entry) "5 ft. from back of curb" Locate request data
Requestor: XYZ Construction Company, Requested service address: 222
Main St, Orlando, FL
TABLE-US-00014 TABLE 11 Example record of data acquired for a
pedestal while in landmark identification mode of operation Record
Service provider ID 0482 # 2 User ID 4815 Device ID 7362 Type of EL
Type = pedestal timestamp data 12-Jul-2008; 09:35:17.5 geo-location
data 2650.9256, N, 08003.5234, W Type of EL Type = pedestal
timestamp data 12-Jul-2008; 09:35:21.2 geo-location data 2650.9256,
N, 08003.5226, W Type of EL Type = pedestal timestamp data
12-Jul-2008; 09:35:26.7 geo-location data 2650.9288, N, 08003.5188,
W Type of EL Type = pedestal timestamp data 12-Jul-2008; 09:35:33.5
geo-location data 2650.9321, N, 08003.5177, W Other info (text
entry) "7 ft from pavement edge" Locate request data Requestor: XYZ
Construction Company, Requested service address: 222 Main St,
Orlando, FL
[0265] FIG. 9 is a block diagram similar to FIG. 7 and illustrates
an exemplary data structure for an electronic record 135 that
includes both locate information and landmark information (i.e.,
that may be generated by and/or based on information collected
during the process 800 discussed above in connection with FIG. 8
and based on the organization of information shown in Tables 10 and
11 above). Like the exemplary electronic record shown in FIG. 7,
the record 135 in FIG. 9 includes a file identifier 701 (e.g., one
or more of Job ID, LocRecID, ServerID, etc.) and a plurality of
actuation data sets 1 through N (with reference numbers 702A, 702B,
702C . . . 702N), wherein each actuation data set is associated
with a corresponding actuation of a locate receiver. In FIG. 9,
also as in FIG. 7, additional details of the data structure for
actuation data set 3 702C are shown, relating to locate information
collected in locate mode. However, unlike FIG. 7, FIG. 9 shows that
the actuation data set 2 702B relates to landmark information
acquired pursuant to an actuation in landmark mode; in particular,
the actuation data set 2 702B includes a date/time field 902, a
type field 904, and a geo-location field 906 corresponding to a
landmark event entry.
[0266] In other respects, the data structure in FIG. 9 is similar
to that shown in FIG. 7. For example, various other information
that may be common to multiple (or all) actuation data sets of a
given electronic record may be stored in one or more additional
elements of the electronic record that are not contained within one
or more of the actuation data sets themselves (e.g., one or more of
the ticket information field 714, the service-related information
field 716, and the locate signal information field 710, which are
shown as part of the data structure for a given actuation data set
of the electronic record, may instead be elements of the electronic
record that are common to all actuation data sets of a given
electronic record).
[0267] Once an actuation of the locate receiver in landmark mode
has been logged as a landmark event entry, the process 800 shown in
FIG. 8 returns to block 610. At this point, the technician is
provided (via the user interface/display) with the options of
pausing the job (block 610), restarting the job if previously
paused (block 612), stopping the job and indicating completion
(block 614) or selecting landmark mode again (block 616) for the
next actuation. If the technician selects none of these options,
the process returns to block 608, at which point further polling
and/or interrupt events are logged, as discussed above in
connection with FIG. 6. Accordingly, after an actuation in landmark
mode, in one exemplary implementation the locate receiver defaults
back to the locate mode, unless and until the technician selects
the landmark mode again for a subsequent actuation.
[0268] In an alternative implementation not shown in FIG. 8,
following actuation of the locate receiver in landmark mode, the
processor may control the user interface/display to provide an
option to the technician to exit landmark mode (rather than
automatically presenting the options of pause job, restart job,
stop job, or landmark mode). In this manner, the locate receiver
remains in landmark mode for subsequent actuations until the
technician makes a menu selection to exit landmark mode, at which
point the process 800 returns to block 610.
[0269] In yet another embodiment, the processor 118, executing
locate data algorithm 137 in landmark mode, may be configured to
generate an essentially continuous stream of data packets
representing various event entries logged by the locate receiver
(e.g., as shown above in Tables 2-9). As discussed above in
connection with the locate mode, each data packet may include a
header, one or more flag fields, and one or more information
payload fields. To accommodate both a locate mode and a landmark
mode, one flag field may be set or reset upon selection of the
landmark mode so as to identify the contents of any information
payload field in the data packet as landmark information as opposed
to locate information. Similarly, as discussed above, one or more
other flag fields may be set (or reset) upon occurrence of one or
more predetermined interrupt events (e.g., pull/depress actuator,
release actuator, automatic logging of data, low power,
communication link fail, etc.). In this manner, a continuous stream
of data may be provided as an output by the processor, in which
certain interrupt events, such as an actuation and/or release of
the actuator, "tag" certain data packets via an interrupt flag, and
certain data packets also may be tagged as generated in locate mode
or landmark mode. In yet other aspects of this embodiment, all data
packets thusly generated may be stored in the file opened for the
electronic record and/or transmitted from the locate receiver in
essentially real time; alternatively, only certain data packets
with one or more predetermined flags set may be stored and/or
transmitted.
[0270] Thus, in landmark identification mode, a locate technician
may employ an appropriately configured locate receiver to capture
the types and locations of environmental landmarks of interest that
are present at the work site and/or in the general environs of a
dig area. While in landmark mode, the locate technician may
approach a certain environmental landmark, then select the type of
the environmental landmark via user interface, position the locate
receiver (e.g., place the tip of locate receiver) proximate to the
target environmental landmark, and then actuate the locate
receiver. In doing so, the locate receiver logs in an electronic
record landmark information including, for example, the type of the
target environmental landmark, the geo-location of the target
environmental landmark, and a time stamp in an electronic record.
The locate technician may move from one environmental landmark to
the next until information about all environmental landmarks of
interest has been captured. Additionally, one or more data points
(e.g., "landmark event entries") may be captured for any given
environmental landmark.
V. COMPUTER-GENERATED VISUAL REPRESENTATION OF A LOCATE OPERATION
INCLUDING LOCATE INFORMATION AND LANDMARK INFORMATION
[0271] With reference again to FIGS. 4 and 5, in yet another
embodiment the processor 118, executing locate data algorithm 137,
and/or one or more remote computers 150 executing locate data
algorithm 137, may additionally process various locate information
and/or landmark information provided in real time from a locate
receiver and/or stored in an electronic record of locate operation
and control a display device (e.g., display 146 of locate receiver
110 or some other display device) to render a computer-generated
visual representation of one or both of the locate information and
landmark information. Such a visual representation may be used, for
example, to provide immediate feedback to the locate technician,
provide essentially real-time feedback to a supervisor monitoring
the technician from a remote location, provide a visual record of
the locate information and/or the landmark information (e.g., for
archiving purposes, once one or more electronic records are
generated), and/or to verify the quality (e.g., accuracy and
completeness) of work performed during a locate and marking
operation. For purposes of the following discussion, a "locate
operation" may refer to one or both of the processes of collecting
locate information and landmark information. Accordingly, it should
be appreciated that in various exemplary implementations of a
computer-generated visual representation, only locate information
may be visually rendered, only landmark information may be visually
rendered, or both locate information and landmark information may
be visually rendered.
[0272] In various aspects of this embodiment, a visual
representation may be static in that all available locate
information and/or landmark information is presented in a display
field at one time after generation of an electronic record;
alternatively, the visual representation may be dynamic in that
locate information and/or landmark information is displayed in
essentially real-time as it is collected, or may be displayed after
generation of the electronic record in a time-sequenced animation
that "recreates" the collection of information on the time scale in
which it was originally acquired (e.g., based on the time stamps
indicating when the information was acquired).
[0273] In other aspects, the relative positions of one or more
detected facilities, as represented by actuation event entries
and/or interrupt event entries (e.g., representing automatically
logged locate information) logged and/or transmitted by the locate
receiver, as well as the relative positions of all environmental
landmarks represented by landmark event entries logged and/or
transmitted by the locate receiver, may be displayed (e.g., based
on geo-location data and some appropriate scale of an available
display field of display 146) to provide a visual representation of
the locate operation. A visual representation of a locate operation
may also be rendered in one or more particular colors corresponding
to one or more particular underground facilities detected during
the locate operation (e.g., see Table 7).
[0274] In one exemplary implementation, such a visual
representation may include one "electronic detection mark"
displayed in a display field for each actuation of a locate
receiver. Alternatively, in another exemplary implementation of
such a visual representation, an essentially continuous solid line
(or other line type) may be displayed in a display field to
represent a given underground facility detected during a locate
operation. In another aspect, the processor may process the
geo-location data in respective actuation data sets of an
electronic record so as to filter, average, interpolate and/or
otherwise "smooth" data (e.g., so as to provide "cleaner" visual
renderings and/or connect successive electronic detection marks
represented by the respective actuation data sets of the electronic
record); alternatively, "raw data" provided by the locate receiver
may be utilized for the visual representation. In yet another
aspect of this embodiment, visual representations of multiple
locate operations for different underground facilities within the
same work site/dig area may be generated in the same display field
of a display device so as to provide a composite visual
representation, in which different underground facilities may be
uniquely identified in some manner (e.g., by different line types
and/or different colors), and one or more environmental landmarks
in and/or around the work site/dig area may be identified using a
variety of displayed identifiers (e.g., icons, symbols, marks,
shapes, etc.).
[0275] FIG. 10 illustrates a flow chart for a process 850 according
to one embodiment of the present invention for generating a visual
representation of a locate operation based on an electronic record
and/or essentially real-time information transmission from the
locate receiver 110. As noted above, the process 850 may result
from the execution of various embodiments of the locate data
algorithm 137 on the processor 118 of the locate receiver 110 (to
render the visual representation on the display 146 of the locate
receiver), or by one or more other remote computers (to render the
visual representation on one or more other display devices).
[0276] In block 802 of the process 850, if an electronic record has
already been generated for the locate operation in which one or
more underground facilities are detected and/or environmental
landmark information is acquired, the record is examined to
determine the geographic extents of the electronic detection marks
and/or environmental landmarks to be visually rendered on a display
device. In particular, the processor 118 may review the
geo-location data of all elements/actuation data sets of the
electronic record to determine (e.g., based on the respective
latitude and longitude coordinates of the available geo-location
data) the maximum extents of the locate operation to be visually
rendered.
[0277] The maximum extents of the locate operation may be
determined in any of a variety of manners according to different
exemplary implementations. For example, in one exemplary
implementation, in block 802 the processor 118 may determine the
centroid of all electronic detection marks and/or environmental
landmarks represented by the data of the electronic record to be
displayed. The processor then determines the geographic extent of
the collection of electronic detection marks and/or environmental
landmarks by determining one or more latitude/longitude coordinate
pairs from the available data having a greatest distance from the
centroid. In one example, the processor may determine a single
farthest point from the centroid, and a distance between this
farthest point and the centroid serves as a radius of a circle that
provides an "extents area circle." In another example, the
"farthest opposing corners" of a rectangle around the centroid may
be determined by assigning the centroid as the origin of a
reference coordinate system, and finding the coordinate pairs in
opposing quadrants of the coordinate system having a greatest
distance from the centroid (e.g., the +LAT/+LONG and -LAT/-LONG
coordinate pairs at a greatest distance from the origin) to provide
an "extents area rectangle." Other types of polygons and closed
shapes (ovals) may be employed to provide an extents area for the
locate operation to be displayed.
[0278] Alternatively, if an electronic record has not been
previously generated and information received in essentially
real-time from the locate receiver is to be displayed in a display
field, a default extents area may be selected in advance based on
any of a variety of criteria. For example, address and/or site
description information provided in a ticket pursuant to which the
locate operation is performed may provide a basis on which an
extents area for the locate operation may be estimated a priori.
Similarly, as discussed further below in connection with FIG. 13,
an available digital image of the work site/dig area may be
employed to determine or estimate an initial extents area for the
locate operation.
[0279] In block 804, the extents area of the locate operation to be
visually rendered is then mapped to an available display field of a
display device, using any appropriate scaling factor as necessary,
to ensure that all of the geo-location data in the electronic
record fits within the display field. For example, in one exemplary
implementation, a transformation may be derived using information
relating to the available display field (e.g., a reference
coordinate system using an appropriate scale for a given display
field of a display device) to map data points within the extents
area to the available display field. In another aspect of this
example, a buffer area around the extents area may be added to
provide one or more suitable margins for the displayed visual
representation, and/or to accommodate different shapes of extents
areas to the available display field of the display device, and an
appropriate transformation may be derived based on this optional
additional buffer area.
[0280] Once a transformation is derived to map the locate operation
extents area to the available display field of a display device, in
block 806 one or more electronic detection marks and/or one or more
identifiers (e.g., icons, symbols, marks, shapes, etc.) for
environmental landmarks is/are rendered in the display field based
on applying the transformation to the geo-location data present in
the data set of the electronic record (which in some instances may
include one or more actuation data sets). In one exemplary
implementation, one electronic detection mark is rendered in the
display field for each actuation data set of an electronic record.
In one aspect, as discussed above, a given electronic detection
mark may be rendered in a particular color and/or line type to
represent a type of underground facility represented by the
mark.
[0281] FIG. 11 illustrates a plan view of an exemplary composite
visual representation 900 that "electronically recreates" a locate
operation for various underground facilities and environmental
landmarks present in a work site/dig area, based for example on the
process 800 discussed above in connection with FIG. 8. In
particular, FIG. 11 illustrates a number of electronic detection
marks corresponding to actuations and/or automatic logging
interrupt events of a locate receiver whose relative positions in
the display field are derived from the corresponding geo-location
data in an electronic record, as discussed above. In the example of
FIG. 11, act-1 through act-7 form a lines pattern 910 representing
a first detected underground facility, act-8 through act-14 form a
lines pattern 912 representing a second detected underground
facility, act-15 through act-24 form a lines pattern 914
representing a third detected underground facility, and act-25
through act-34 form a lines pattern 916 representing a fourth
detected underground facility. FIG. 11 also includes identifiers
for various environmental landmarks disposed in proximity to the
electronic detection marks; in particular, a building 950 is shown
in the top portion of FIG. 11, whereas two utility poles 952 and
954, as well as a fire hydrant 956, are shown in the bottom portion
of FIG. 11.
[0282] As noted above, while in one embodiment there may be a
one-to-one correspondence between electronic detection marks
rendered in a single or composite visual representation and
actuations/automatic data logging interrupt events of a locate
receiver, in yet other embodiments a single or composite visual
representation may provide a variety of other indicators/digital
representations of detected underground facilities in a
computer-generated visual rendering. For example, FIG. 12
illustrates another example of a composite visual representation
1000 based on the same electronic record used to generate the
composite visual representation 900 of FIG. 11, in which continuous
lines are used to indicate the respective locate operations. To
this end, in one exemplary implementation, an additional step may
be included in the process 800 shown in FIG. 8, in which the
processor may process the locate geo-location data in an electronic
record by filtering, averaging, interpolating and/or otherwise
"smoothing" the data (e.g., so as to connect successive discrete
detection marks represented by respective actuation data sets/event
entries of the electronic record) and thereby provide a
substantially smooth continuous line for display.
[0283] Similarly, filtering, averaging, interpolating, processing
and/or otherwise smoothing of data may be applied to landmark
information captured in landmark event entries. For example,
multiple event entries logged for a particular environmental
landmark (e.g., the four corners of a pedestal) may be processed so
as to provide a single point in a display field at which to display
a symbol, icon or other identifier for an environmental landmark.
Such processing may include, for example, selecting any one of
multiple geo-location coordinates captured in multiple event
entries as representative of the landmark location, calculating a
centroid of all points represented by captured coordinates,
"pre-filtering" a collection of coordinates to eliminate
significant "outliers" and subsequently determining a centroid of
the remaining coordinates, etc.
[0284] In the example of FIG. 12, as also noted above, different
underground facility types may be indicated in different color
lines, and the different colors/facility types may be derived from
the electronic record (e.g., based on the correlations provided in
Table 7). Furthermore, in other aspects, text indicators may be
included in the visual representation, and/or other types of coding
may be used (different line styles such as patterns, width, bold,
etc.; a succession of symbols or other graphic icons, etc.) to
indicate different facility types, and/or some other aspect of a
given facility (e.g., the material used for a particular pipe,
conduit, cable, sheathing; the diameter of a particular pipe,
conduit, cable; offsets to one or more environmental landmarks,
etc.). By way of example, FIG. 12 indicates that the four
underground facilities in the composite visual representation
correspond to a power line 1010 (which may be rendered in the color
red), a first sewer line 1012 (which may be rendered in the color
green), a second sewer line 1014 (which also may be rendered in the
color green), and a telecommunications line 1016 (which may be
rendered in the color orange). An exemplary composite visual
representation may include additional textual, numeric and/or
graphic elements to provide other information available in the
electronic record for the locate operations (e.g., timestamp
information, ID information, coordinates for location information,
offset indications, etc.). For example, in FIG. 12 an offset 958 of
3 feet is indicated between the fire hydrant 956 and the sewer line
1014.
[0285] In yet another embodiment, a single or composite visual
representation of a locate operation, including one or both of
locate information and landmark information, may be rendered on a
display device together with a digital image representative of at
least a portion of a dig area at a work site, such that one or more
electronic detection marks and/or one or more identifiers for
environmental landmarks appear in appropriate relative positions
overlaid on the displayed digital image. FIG. 13 illustrates yet
another example of a composite visual representation 1100, albeit
based on an electronic record different than that used to generate
the visual representations of FIGS. 11 and 12, in which continuous
lines are used to indicate the respective different underground
facilities detected, and these lines are overlaid on a digital
image of a dig area, together with identifiers for environmental
landmarks. It should be appreciated that although continuous lines
representing underground facilities are depicted on a digital image
in FIG. 13, in other embodiments discrete electronic detection
marks corresponding to successive actuations/automatic logging
interrupt events of the locate receiver may be overlaid on a
digital image of the dig area.
[0286] In the embodiment of FIG. 13, a number of different image
sources and image types may be employed to provide the digital
image on which a visual representation of a locate operation may be
overlaid. For purposes of the present disclosure, such a digital
image (also referred to herein as an "input image") may be any
image represented by source data that is electronically processed
(e.g., the source data is in a computer-readable format) to display
the image on a display device. An input image may include any of a
variety of paper/tangible image sources that are scanned (e.g., via
an electronic scanner) or otherwise converted so as to create
source data (e.g., in various formats such as XML, PDF, JPG, BMP,
etc.) that can be processed to display the input image. An input
image also may include an image that originates as source data or
an electronic file without necessarily having a corresponding
paper/tangible copy of the image (e.g., an image of a "real-world"
scene acquired by a digital still frame or video camera or other
image acquisition device, in which the source data, at least in
part, represents pixel information from the image acquisition
device).
[0287] In some exemplary implementations, input images according to
the present disclosure may be created, provided, and/or processed
by a geographic information system (GIS) that captures, stores,
analyzes, manages and presents data referring to (or linked to)
location, such that the source data representing the input image
includes pixel information from an image acquisition device
(corresponding to an acquired "real world" scene or representation
thereof), and/or spatial/geographic information ("geo-encoded
information").
[0288] In view of the foregoing, various examples of input images
and source data representing input images according to the present
disclosure, to which the inventive concepts disclosed herein may be
applied, include but are not limited to: [0289] Manual "free-hand"
paper sketches of the geographic area (which may include one or
more buildings, natural or man-made landmarks, property boundaries,
streets/intersections, public works or facilities such as street
lighting, signage, fire hydrants, mail boxes, parking meters,
etc.); [0290] Various maps indicating surface features and/or
extents of geographical areas, such as street/road maps,
topographical maps, military maps, parcel maps, tax maps, town and
county planning maps, call-center and/or facility polygon maps,
virtual maps, etc. (such maps may or may not include geo-encoded
information); [0291] Facility maps illustrating installed
underground facilities, such as gas, power, telephone, cable, fiber
optics, water, sewer, drainage, etc. Facility maps may also
indicate street-level features (streets, buildings, public
facilities, etc.) in relation to the depicted underground
facilities. Examples of facility maps include CAD drawings that may
be created and viewed with a GIS to include geo-encoded information
(e.g., metadata) that provides location information (e.g.,
infrastructure vectors) for represented items on the facility map;
[0292] Architectural, construction and/or engineering drawings and
virtual renditions of a space/geographic area (including "as built"
or post-construction drawings); [0293] Land surveys, i.e., plots
produced at ground level using references to known points such as
the center line of a street to plot the metes and bounds and
related location data regarding a building, parcel, utility,
roadway, or other object or installation; [0294] A grid (a pattern
of horizontal and vertical lines used as a reference) to provide
representational geographic information (which may be used "as is"
for an input image or as an overlay for an acquired "real world"
scene, drawing, map, etc.); [0295] "Bare" data representing
geo-encoded information (geographical data points) and not
necessarily derived from an acquired/captured real-world scene
(e.g., not pixel information from a digital camera or other digital
image acquisition device). Such "bare" data may be nonetheless used
to construct a displayed input image, and may be in any of a
variety of computer-readable formats, including XML); [0296]
Photographic renderings/images, including street level,
topographical, satellite, and aerial photographic
renderings/images, any of which may be updated periodically to
capture changes in a given geographic area over time (e.g.,
seasonal changes such as foliage density, which may variably impact
the ability to see some aspects of the image); and [0297] An image,
such as any of the above image types, that includes one or more dig
area indicators that provide one or more indications of or
graphically delimit a dig area, as described in U.S. patent
application Ser. No. 12/366,853, published as U.S. Patent
Publication No. 2009-0238417-A1, incorporated by reference herein.
The virtual white lines may include lines, drawing shapes, shades,
symbols, coordinates, data sets, or other indicators that are added
to an image, and may assist a locate technician in the performance
of a locate operation by identifying the area of interest, i.e.,
the dig area. In this manner, a searchable electronic record
according to the concepts disclosed herein may be generated based
on a previously marked-up input image on which the dig area is
indicated.
[0298] It should also be appreciated that source data representing
an input image may be compiled from multiple data/information
sources; for example, any two or more of the examples provided
above for input images and source data representing input images,
or any two or more other data sources, can provide information that
can be combined or integrated to form source data that is
electronically processed to display an image on a display
device.
[0299] As noted above, in some implementations an input image may
be indexed to Global Positioning System (GPS) coordinates or
another coordinate system that provides geo-spatial positioning. An
input image may include geo-coding or other geographical
identification metadata and may be provided in any
computer-readable format. An input image may also include images of
map symbols, such as roads and street names, that may be
superimposed upon or displayed separately from an underlying
geographic area when the input image is displayed on a display
device.
[0300] Based on the foregoing, a digital image may be displayed in
an available display field of a display device either before or
after electronic detection marks and/or identifiers for
environmental landmarks are displayed in the available display
field. For example, in one implementation, after the block 806 in
FIG. 10, all or a portion of the digital image may be mapped to the
available display field based on any relevant geographic
information accompanying the digital image (e.g., GPS coordinates
to which the image is indexed). Alternatively, the digital image
may be mapped first to the available display field of the display
device depending on appropriate scaling and/or transformation
parameters as would be readily appreciated by one of ordinary skill
in the art, and thereafter one or more electronic detection marks
and/or one or more identifiers for environmental landmarks
similarly may be mapped to the available display field in
appropriate positions relative to the underlying digital image. In
the example of FIG. 13, a first visual representation of a gas line
1130 is depicted, a second visual representation of a communication
line 1120 is depicted, and a third visual representation of an
electric line 1110 is depicted on an aerial image of a residential
dig area for purposes of illustration. As discussed above in
connection with other embodiments, these visual representations may
be displayed in different colors and/or line types to denote
different types of underground facilities and/or various attributes
of a given facility. As also illustrated in FIG. 13, other types of
features may be included as part of the displayed image, including
various environmental landmarks such as junction boxes or
transformers 1140, streets, property boundaries, tie-downs
(reference lines between detected and/or marked facilities and
environmental landmarks and/or property boundaries) and their
associated dimensions, and one or more text boxes 2173 (e.g., to
indicate an address of the work site over the residence), and the
like.
[0301] In some implementations, locate information and landmark
information, if displayed together, may be differentiated in a
display field in any of a variety of manners (e.g., different line
types, symbols or patterns; different colors or shades of related
colors; artificially offset from each other in the display field if
locate information and landmark information overlap or are
sufficiently close to each other in some instances, etc.) to allow
for sufficient visual perception of both locate information and
landmark information.
[0302] Additionally, in one embodiment, each of locate information
and landmark information, if present in a computer-aided visual
rendering, as well as any constituent information forming part of
the locate information and landmark information, may be displayed
as separate "layers" of the visual rendering, such that a viewer of
the visual rendering may turn on and turn off displayed information
based on a categorization of the displayed information. FIG. 14
shows a generic display device 3000 having a display field 3005
with exemplary content for purposes of explaining some concepts
germane to display layers, according to one embodiment. For
example, all locate information may be categorized generally under
one layer designation 3030 ("locate layer") and independently
enabled or disabled for display accordingly, and all landmark
information may be categorized generally under yet another layer
designation 3040 ("landmark layer") and independently enabled or
disabled for display accordingly. Respective layers may be enabled
or disabled for display in any of a variety of manners; for
example, in one implementation, a "layer directory" or "layer
legend" pane 3010 may be included in the display field 3005 (or as
a separate window selectable from the display field of the visual
rendering), showing all available layers, and allowing a viewer to
select each available layer to be either displayed or hidden, thus
facilitating comparative viewing of layers.
[0303] Furthermore, any of the above-mentioned general categories
for layers may have sub-categories for sub-layers, such that each
sub-layer may also be selectively enabled or disabled for viewing
by a viewer. For example, under the general layer designation of
"locate layer," different facility types that may have been
detected during a locate operation (and indicated in the locate
information by color, for example) may be categorized under
different sub-layer designations (e.g., designation 3032 for
"locate layer--electric;" designation 3034 for "locate layer--gas;"
etc.); in this manner, a viewer may be able to hide only the
electric locate information while viewing the gas locate
information, or vice versa, in addition to having the option to
view or hide all locate information. Sub-layer designations
similarly may be employed for the landmark information (e.g.,
designation 3042 for "landmark layer--water/sewer;" designation
3044 for "landmark layer--CATV;" designation 3046 for "landmark
layer--buildings"). As shown in the example of FIG. 14, both the
locate and landmark layers are enabled for display; amongst the
illustrated sub-layer designations, only the "electric" sub-layer
of the locate layer is enabled for display, and only the
"buildings" sub-layer of the landmark layer is enabled for display.
Accordingly, using the exemplary composite visual representation
1000 shown in FIG. 12 as a baseline for purposes of illustration,
only the power line 1010 appears in the electronic rendering 1000A
shown in FIG. 14 as a constituent element of the electric sub-layer
of the locate layer, together with the building 950.
[0304] Virtually any characteristic of the information available
for display may serve to categorize the information for purposes of
display layers or sub-layers. In particular, any of the various
exemplary constituent elements of locate information discussed
herein (e.g., timing information, geographic information,
service-related information, ticket information, target object
information, locate signal information, locate receiver
information, transmitter information, environmental information,
and operational information, the latter two of which are discussed
in greater detail further below) may be categorized as a sub-layer,
and one or more sub-layers may further be categorized into
constituent elements for selective display (e.g., as
sub-sub-layers). Similarly, any of the various exemplary
constituent elements of landmark information discussed herein
(e.g., geo-location data of an environmental landmark, type of
environmental landmark, a time stamp for any acquired information
relating to an environmental landmark) may be categorized as a
sub-layer (and any sub-layer may be further categorized into
sub-sub-layers, and so on).
[0305] It should further be appreciated that, according to various
embodiments, the attributes and/or type of visual information
displayed as a result of selecting one or more layers or sub-layers
is not limited. In particular, visual information corresponding to
a selected layer or sub-layer may be electronically rendered in the
form of one or more lines or shapes (of various colors, shadings
and/or line types), text, graphics (e.g., symbols or icons), and/or
images, for example. Likewise, the visual information corresponding
to a selected layer or sub-layer may include multiple forms of
visual information (one or more of lines, shapes, text, graphics
and/or images).
[0306] As a non-limiting illustrative example, a "target object"
sub-layer of a "locate" layer may include respective sub-sub-layers
of different facility types detected, in which respective facility
types are rendered on the display as lines having different colors,
line types and/or shading. A "locate signal" sub-sub-sub-layer of a
facility type sub-sub-layer of a "target object" sub-layer may
include respective sub-sub-sub-sub-layers of different signal
characteristics (e.g., frequency, amplitude, phase, gain), in which
different signal values are rendered on the display as text (e.g.,
in proximity to the visual rendering of the detected facility line
of the corresponding type). Similarly, a "temperature" sub-layer of
a "locate" layer may include ground temperatures sensed during
detection of respective facility lines, in which sensed
temperatures are rendered on the display as an icon/symbol in
combination with text (e.g., a snowflake accompanied by a text
label "15 deg. F.") in proximity to the visual rendering of the
detected facility line. From the foregoing, it may be appreciated
that a wide variety of information may be categorized in a nested
hierarchy of layers, and information included in the layers may be
visually rendered, when selected/enabled for display, in a variety
of manners.
[0307] In addition to the locate information and/or the landmark
information, in yet other embodiments in which a digital image is
rendered in the display field (e.g., as shown in FIG. 13), the
image information on which the digital image is based may be
categorized as its own display layer, such that the locate
information, landmark information, and image information may be
selectively enabled or disabled for display as a display layer. In
this manner, the displayed digital image on which one or both of
locate information and landmark information may be overlaid (and in
some instances constituent elements thereof) may be toggled on and
off conveniently for comparative display.
[0308] In one exemplary implementation, all image information may
be categorized generally under one layer designation (e.g.,
"Reference"--see designation 3050 in FIG. 14), and independently
enabled or disabled for display (e.g., hidden) accordingly.
Similarly, while not shown in FIG. 14, in some implementations all
information available for overlay, including both locate
information and landmark information if available, may be
categorized generally under another layer designation (e.g.,
"Field") and independently enabled or disabled for display;
accordingly, it should be appreciated that in one aspect of this
alternative implementation, under the general layer designation of
"Field," the locate information may be categorized as one sub-layer
of the Field layer (in some cases with additional associated locate
sub-sub-layers) and the landmark information may be categorized as
another sub-layer of the Field layer (in some cases with additional
associated landmark sub-sub-layers).
[0309] Like the "Field" layer, the "Reference" layer similarly may
have one or more sub-layers for various constituent elements of the
image information upon which the digital image is rendered.
Virtually any number of possible sub-layers may be accordingly
designated, based at least on the various examples of image
information discussed above (e.g., maps, such as road maps or
facilities maps; dig area indicators, either alone or forming part
of a digital image; grids, either alone or forming part of a
digital image; engineering or architectural drawings; photographic
renderings; etc.--any of which may have constituent elements of
information that respectively may be categorized as
sub-sub-layers). To provide illustrative non-limiting examples of
sub-layers of the "Reference" layer, FIG. 14 indicates a "digital
image" sub-layer with the designation 3052, a "dig area
indicator(s)" sub-layer with the designation 3054, and a "grid"
sub-layer with the designation 3056.
[0310] The various examples of visual representations illustrated
in FIGS. 11-14 may be used for various purposes, including, but not
limited to: [0311] (1) The display may be viewed by the locate
technician for substantially immediate feedback of his/her work
performed, which can be compared against the ticket information to
ensure that the full scope of the current locate operation has been
completed satisfactorily. [0312] (2) The display may be viewed by a
supervisor (using remote computer 150 that is receiving the data)
as substantially immediate feedback of work performed by the locate
technician, which again can be compared against the ticket
information to ensure that the full scope of the current locate
operation has been completed satisfactorily. When the supervisor is
viewing the locate operation in real time, he/she may contact the
locate technician in real time in the event that the locate
operation is unsatisfactory; [0313] (3) The display may be viewed
by a quality control supervisor (using remote computer 150 that has
received the data) as feedback of work performed by the technician,
which again can be compared against the ticket information to
ensure that the full scope of the current locate operation has been
completed satisfactorily. By viewing the locate operation, the
quality control supervisor may dispatch a quality control
technician or other personnel in the event that the locate
operation is unsatisfactory, and [0314] (4) The display may be
viewed by a training supervisor as feedback of work performed by
the locate technician, which can be used to assess employee
performance and direct training activities.
VI. ENVIRONMENTAL AND OPERATIONAL SENSORS, AND INFORMATION DERIVED
THEREFROM
[0315] According to another aspect of the present invention, a
locate receiver (or other locate device, e.g., a locate
transmitter) includes one or more environmental and/or operational
sensors, which constitute additional examples of input devices from
which locate information may be derived. In particular, one or more
environmental sensors associated with a locate receiver may provide
a variety of environmental information in connection with use of
the locate receiver; similarly, one or more operational sensors
associated with the locate receiver may provide a variety of
operational information in connection with use of the locate
receiver. One or both of such environmental information and
operational information may constitute all or a portion of locate
information and may be employed in any of the manners described
above in connection with locate information. In particular,
environmental information and/or operational information may be
logged/stored in local memory of a locate receiver, transferred to
and stored in internet accessible memory, formatted in various
manners, processed and/or analyzed at the locate receiver itself,
and/or transmitted to another device (e.g., a remote
computer/server, an internet storage site, cellular telephone,
personal digital assistant (PDA), etc.) for storage, processing
and/or analysis.
[0316] As used herein, environmental sensors are those which sense
some condition of the environment in which the locate receiver is
present, but need not sense a condition of the locate receiver
itself. Examples of environmental conditions which may be sensed
include, but are not limited to, temperature, humidity, light, and
altitude, among others. Environmental sensors may be included with
the locate receiver for one or more of various reasons. For
example, information provided by one or more of the environmental
sensors may be used to assess whether a locate operation was or is
being performed in suitable environmental conditions (e.g., within
accepted environmental tolerances). Additionally or alternatively,
information provided by one or more environmental sensors may be
used to interact with the technician operating the locate receiver,
for example by issuing a notification or warning signal to the
technician if the sensed environmental condition is outside of an
acceptable range (i.e., out of tolerance). Also, the information
from the environmental sensor(s) may trigger an action or
alteration of the locate receiver, such as activating, enabling or
disabling a particular component of the locate receiver.
Additionally or alternatively, information provided by one or more
environmental sensors may augment other information collected by
the locate receiver, such as any of the types of information
described above as being collected by a locate receiver according
to various embodiments herein. In some instances, information from
two or more of the environmental sensors may be used in
combination, examples of which are described in detail below.
[0317] As used herein, operational sensors are those which sense
some operating condition of the locate receiver. Examples of such
conditions include, but are not limited to, the angle of
inclination of the locate receiver, the direction or heading of the
locate receiver, a pressure applied to the locate receiver, and/or
some characteristic of motion of the locate receiver (e.g., the
speed at which the locate receiver is moving, the acceleration of
the locate receiver, etc.), among others. Operational sensors may
be included with the locate receiver for one or more of various
reasons. For example, information provided by one or more of the
operational sensors may be used to assess whether a locate receiver
was or is operating appropriately during a marking operation or
whether the locate receiver was or is being operated (e.g., both
electronically and/or physically manipulated) appropriately by the
technician (e.g., within accepted tolerances or according to
protocols). Additionally or alternatively, information from one or
more operational sensors may be used to detect patterns of
operation of the technician, such as technician "signatures" in
using/manipulating the locate receiver (e.g., characteristic
movements unique to the technician). Additionally or alternatively,
information from one or more operational sensors may be used to
interact with the technician, for example by issuing a notification
or warning signal to the technician in response to the detected
operational characteristic falling outside of an acceptable range.
Also, the information from the operational sensor(s) may trigger an
action or alteration of the locate receiver, such as activating,
enabling or disabling a particular component of the locate
receiver. Additionally or alternatively, information provided by
one or more operational sensors may augment other information
collected by the locate receiver, such as any of the types of
information previously described herein in connection with other
embodiments. Other uses of data provided by one or more operational
sensors are also possible and contemplated in the various aspects
described herein. In some instances, information from two or more
operational sensors may be used in combination, examples of which
are described below. Furthermore, information from one or more
operational sensors may be used in combination with information
from one or more environmental sensors, as also described further
below.
[0318] It should be appreciated that some of the sensors described
herein may be considered both environmental and operational
sensors, either because the sensor senses both an environmental
condition and an operating condition of the locate receiver (i.e.,
the sensor senses more than one condition) or because a single
condition sensed by the sensor may be considered both an
environmental condition and an operating condition. For example, an
image capture device may be considered both an environmental sensor
(e.g., the image capture device may capture an image of the
surrounding environment) and an operational sensor (e.g., the image
capture device may capture an image of some action the technician
has taken, for example, an image of the manner in which the
technician is holding the locate receiver). Furthermore, the
operation of a sensor may change over time. For example, a sensor
may be configured at one time to measure an internal operating
temperature and at a different time to measure an outside ambient
temperature. Thus, it should be appreciated that while the sensors
described below are categorized generally as being either
environmental or operational for purposes of illustrating some
exemplary implementations, the categories are not mutually
exclusive, and such categorization is not limiting unless otherwise
stated.
[0319] FIG. 15 is a functional block diagram of a data acquisition
system including a locate receiver with both environmental sensors
and operational sensors, according to one embodiment of the present
invention. As previously mentioned, a locate transmitter may
likewise include environmental and/or operational sensors, although
the following discussion focuses on locate receivers for purposes
of illustration. As shown in FIG. 15, the data acquisition system
1500 includes a locate receiver 1510 and the previously described
remote computer 150. The locate receiver 1510 comprises control
electronics 112, power source 114, and detection electronics 131,
all of which also have been described above in connection with
other embodiments. The locate receiver 1510 also comprises a light
source 1532, and one or both of environmental sensors 1520 and
operational sensors 1530. It should be appreciated that while both
environmental sensors 1520 and operational sensors 1530 are shown
in the locate receiver 1510, locate receivers according to other
embodiments contemplated by the present disclosure need not
necessarily include both environmental sensors and operational
sensors.
[0320] With respect to environmental sensors, non-limiting examples
of suitable environmental sensors include a temperature sensor
(e.g., one or more of an ambient temperature sensor and a surface
temperature sensor (e.g., a temperature sensor for sensing a
temperature of a surface toward which the locate receiver is
pointed or oriented)), a humidity sensor, a light sensor, an
altitude sensor, an image capture device (e.g., a camera), and an
audio recorder. This list is not exhaustive, however, as other
types of environmental sensors may be included as appropriate to
sense various environmental conditions of interest.
[0321] FIG. 16 is a block diagram showing details of the
environmental sensors 1520 shown in FIG. 15, according to one
embodiment of the present invention. In FIG. 16, the illustrated
environmental sensors 1520 include an ambient temperature sensor
1602, a surface temperature sensor 1604, a humidity sensor 1606, a
light sensor 1608, an altitude sensor 1609, an image capture device
1610, and an audio recorder 1612. Additional or alternative
environmental sensors may be included, and one or more of the
illustrated environmental sensors may be omitted, in some
embodiments. The environmental sensors may be coupled to the
processor 118 to receive control signals from the processor 118
and/or to provide their respective outputs (e.g., signals, data,
information) to the processor 118, and, as described further below,
may operate in one of various suitable manners. Information
provided by any of the environmental sensors may be stored in local
memory 122, for example as an electronic record 1802, described
below, and/or transmitted to an external device, such as the remote
computer 150, remote storage, etc.
[0322] The ambient temperature sensor 1602 may be configured to
sense the ambient temperature in the vicinity of the locate
receiver 1510. The ambient temperature may be a useful piece of
information, for example in determining whether the temperature is
adverse to performance of the locate operation, which may occur
when the temperature is too hot or too cold. For example, in some
embodiments, it may be preferable to operate the locate receiver
only within a predetermined ambient temperature range between
20.degree. F. and 110.degree. F., although other ranges are
possible. In addition, as described further below, the ambient
temperature may be useful in combination with one or more other
types of environmentally sensed inputs, such as humidity, in
evaluating the conditions in which a locate operation is
performed.
[0323] The ambient temperature sensor may be any suitable
temperature sensor, such as an infrared sensor, and may be an
analog or digital temperature sensor, as the various aspects
described herein relating to a locate receiver including an ambient
temperature sensor are not limited to using any particular type of
temperature sensor. According to one embodiment, the temperature
sensor may be part of a combined temperature and humidity sensor,
such as the HS-2000V from Precon of Memphis, Tenn. In some
embodiments, the ambient temperature sensor may be suitable to
operate between -40.degree. F. and 125.degree. F., or over any
other suitable range, which in some embodiments may encompass the
expected temperatures to which the locate receiver may be exposed
during normal operation. The data output by the ambient temperature
sensor 1602 may be stored in local memory 122 and/or may be
transmitted to an external device, such as remote computer 150, in
those embodiments in which the locate receiver 1510 is
communicatively coupled to the external device.
[0324] The surface temperature sensor 1604 may be configured to
sense the temperature of the surface toward which the locate
receiver is pointing or oriented (e.g., the ground under the locate
receiver). The temperature of the surface may be useful information
for various reasons. Thus, as a non-limiting example, information
from the surface temperature sensor 1604 may be used to assess
whether the locate operation was or is being performed in such
recommended temperature conditions. As with the ambient temperature
sensor 1602, the information provided by the surface temperature
sensor 1604 may be stored in local memory 122 and/or transmitted to
an external device, such as the remote computer 150.
[0325] The surface temperature sensor 1604 may be any suitable type
of sensor for determining surface temperature, such as an infrared
temperature sensor or any other suitable type of temperature
sensor. In some embodiments, the surface temperature sensor may be
configured to operate across a range of temperatures encompassing
all expected surface temperatures to be encountered during normal
operation of the locate receiver. For example, in one embodiment
the surface temperature sensor may operate between -40.degree. F.
and 125.degree. F., although other temperature ranges are also
possible.
[0326] The humidity sensor 1606 may be configured to sense the
humidity of the environment in which the locate receiver 1510 is
used, and in some embodiments may provide a relative humidity
measurement (e.g., 0% to 100% humidity). Such information may be
useful alone or in combination with other information in
determining whether, for example, the environment is too humid for
performance of the locate operation. The humidity information
provided by humidity sensor 1606 may be used to assess whether a
locate operation was or is being performed within acceptable
humidity tolerances. The humidity sensor may be any suitable type
of humidity sensor, as the type is not limiting. According to one
embodiment, the humidity sensor may be part of a combined
temperature and humidity sensor, such as the HS-2000V from Precon
of Memphis, Tenn. The information provided by the humidity sensor
1606 may be stored in local memory 122 and/or transmitted to an
external device, such as the remote computer 150.
[0327] The light sensor 1608 may be configured to sense the
intensity, flux, or illuminance of ambient light in the vicinity of
the locate receiver 1510. Such information may be useful, for
example, to assess whether a locate operation was or is being
performed in suitable lighting conditions (e.g., whether there was
sufficient light to allow for accurate performance of a locate
operation, whether the area surrounding the locate operation is
sufficiently lit to ensure worker safety, etc.). The light sensor
1608 may be any suitable type of light sensor. In one embodiment,
the light sensor is a cadmium sulfide (CdS) photocell, which is a
photoresistor device whose resistance decreases with increasing
incident light intensity. Such a device may provide a resistance or
voltage measurement as its output indicative of measured flux.
However, other types of light sensors may alternatively be used.
One non-limiting example of a suitable photocell is the PDV-P5001
from Advanced Photonix, Inc. of Ann Arbor, Mich.
[0328] The units output by the light sensor may depend on whether
the light sensor is sensing light intensity, light flux, or
illuminance. For example, the output may be in candela for light
intensity, lumen for flux, or lux for illuminance. According to one
embodiment, target values for illuminance for accurate performance
of a marking operation may be between approximately 1,000 lux and
100,000 lux, although other ranges may be appropriate based on a
particular location and type of locate operation being performed.
According to one embodiment, the output may be converted to a
percentage between 0% and 100%, for example in which 0% corresponds
to darkness and 100% corresponds to full sunlight. Other outputs
may alternatively be produced. The information provided by the
light sensor 1608 may be stored in local memory 122 and/or
transmitted to an external device, such as the remote computer
150.
[0329] According to one embodiment, the locate receiver further
comprises a light source 1532, such as a flashlight or light
emitting diode (LED) torch. The light source 1532 may be activated
manually (e.g., by the technician) or may be coupled to the light
sensor 1608 (e.g., directly coupled or coupled through one or more
components, such as processor 118) and activated automatically in
response to the light sensor sensing an unsatisfactorily low
lighting condition (e.g., by receiving a signal from the processor
118 or by directly receiving an output signal of the light sensor).
The threshold light level for such automatic activation may be any
suitable level, non-limiting examples of which include any level at
which the technician may have difficulty seeing and therefore
performing the locate operation, and any predetermined level below
which technician safety may be comprised. Information about such
activation of the light source (e.g., the occurrence of the
activation, the time of activation, the duration, etc.) may be
stored in local memory 122 and/or transmitted to an external
device, such as the remote computer 150.
[0330] The altitude sensor 1609 may be configured to measure the
altitude of the locate receiver 1510, and may be any suitable type
of altitude sensor for doing so. The altitude at which a locate
operation is performed may impact the performance of the locate
operation and worker safety, among other considerations. Thus,
information about the altitude may be useful for a variety of
reasons.
[0331] The output of the altitude sensor 1609 may be in any
suitable units, and in some embodiments provides an altitude with
respect to sea level. For example, the altitude sensor may provide
an altitude in meters, miles, feet, or any other suitable units.
The information provided by the altitude sensor 1609 may be stored
in local memory 122 and/or transmitted to an external device, such
as the remote computer 150.
[0332] The image capture device 1610 may be positioned on the
locate receiver to capture an image of the environment surrounding
the locate receiver 1510 or may be configured or configurable in
any suitable manner to capture any type of image of interest.
According to one embodiment, a technician may be meant to take a
picture of a job site and/or of an environmental landmark at the
job site. Thus, inclusion of an image capture device 1610 in the
locate receiver 1510 may facilitate compliance with such
protocols.
[0333] The image capture device 1610 may be capable of taking still
images, video images, or both, as the various aspects described
herein relating to locate receivers including an image capture
device are not limited in this respect. Thus, the image capture
device 1610 may be any suitable type of image capture device, and
in some embodiments may be a type that is suitable for use in a
portable device, such as, but not limited to, the types of digital
cameras that may be installed in portable phones, wide angle
digital cameras, 360 degree digital cameras, infrared (IR) cameras,
and the like. In some implementations, a wide angle lens and
automatic zoom may be utilized to maximize the coverage area of
each image.
[0334] The output of the image capture device may include various
information. The output may include all or part of a captured
image. Additionally or alternatively, the output may include
information about the settings and/or operation of the image
capture device, such as any one or more of resolution, frame rate
(for video images), flash status (i.e., flash used or not used),
image size, video sequence duration, zoom setting, etc.
[0335] In those embodiments in which the image capture device is a
digital device, the images may be stored in local memory 122 and/or
transmitted to an external device, such as the remote computer 150.
The images may be in any standard or proprietary image file format
(e.g., JPEG, TIFF, BMP, etc.). Furthermore, the images may be
associated with a specific job, a geographic position, and an exact
time, in some embodiments, for example by flagging the image based
on the time at which it was taken, the location at which it was
taken, and/or the job during which it was taken. In one embodiment,
each captured image may be cached and transmitted with all other
captured data from one or more other sensors/input devices.
[0336] The environmental sensors 1520 may further comprise an audio
recorder 1612, which may be used to capture audio input from a
technician and/or from the environment (e.g., sounds in the
vicinity of the locate receiver). Thus, in one embodiment, the
technician may, for example, dictate notes relating to the
performance of the locate operation, such as describing visible
landmarks in the area of the locate operation, notes about
performance of the locate receiver, or any other notes which may be
relevant to performance of a locate operation. In one embodiment,
the audio recorder may record sounds from the environment, such as
passing cars, planes, etc. Such recordings may be useful, for
example, in assessing whether a technician was at the intended
location of the locate operation. For example, if a passing train
is evident from the recording and the intended location is not near
a train track, the recording may provide evidence that the
technician was in the wrong location.
[0337] The audio recorder 1612 may be an analog or digital device
or devices. For example, in one embodiment the audio recorder 1612
may be an analog recorder configured to receive an analog input
signal (e.g., from a microphone) and store the analog signal.
According to another embodiment, the audio recorder 1612 may be a
digital audio recorder, including any suitable combination of
components for receiving an analog signal (e.g., from a
microphone), converting the analog signal to a digital signal,
performing any suitable digital signal processing (e.g., filtering,
amplifying, converting to text, etc.) and storing the digital
information. According to one embodiment, the audio recorder may
include a dedicated digital audio processor to perform those
functions recited or any other suitable functions. It should be
appreciated from the foregoing that a microphone (not shown in FIG.
15) may be associated with the audio recorder 1612 to provide the
audio input to the audio recorder.
[0338] According to one embodiment, for example in which a
technician may dictate notes, the audio processing of the audio
input may include performing speech recognition (e.g., speech to
text generation). Such functionality may be provided by suitable
speech recognition software executing on a dedicated audio
processor, or in any other suitable manner. Any generated text may
be, for example, displayed on a display of the user interface 126,
or may be stored for later display on a separate device.
[0339] The recordings provided by the audio recorder 1612 may be
stored in a dedicated audio memory, in local memory 122 and/or
transmitted to an external device, such as the remote computer 150.
In those embodiments in which the audio recorder is a digital audio
recorder, the audio files may be in any standard or proprietary
audio file format (e.g., WAV, MP3, etc.).
[0340] Although not illustrated in FIG. 16, the communication
interface 124 of FIG. 15 may also serve as or enable another
environmental sensor. According to one embodiment, the locate
receiver may be internet enabled and information may be received
via the communication interface 124 over the internet. According to
one embodiment, information about an environmental condition may be
received via the communication interface. For example, temperature
information or humidity information, among others, may be received
over the internet via communication interface 124. In such
instances, the received temperature or humidity information may
augment any temperature and humidity information collected by a
temperature and humidity sensor of the locate receiver, or may
replace such information, such that in some embodiments the locate
receiver may not include a physical temperature or humidity sensor.
Thus, it should be appreciated that the communication interface may
serve as a "virtual sensor" by receiving environmental information
of interest, not being limited to temperature and humidity.
[0341] It should be appreciated from the foregoing, as well as the
further discussion below, that environmental information may be
collected for various purposes. According to one embodiment, the
environmental information may be useful for assessing a locate
device (e.g., locate receiver) or locate operation. According to
another embodiment, the environmental information may be useful for
assessing the conditions in which marking material is being
dispensed. As previously explained, locate operations may involve
the use of a locate receiver to detect a facility location and a
marking device to mark the facility location, for example by
dispensing a marking material. The environmental information sensed
by the environmental sensors 1520 may be useful for assessing the
conditions in which marking material is being dispensed in those
situations in which a marking device is being used in connection
with the locate receiver. Some marking materials (e.g., paint), for
example, may have preferred temperature ranges and humidity levels,
among other conditions, in which they may be dispensed. Thus,
environmental information may facilitate determination of whether a
marking material was or is being dispensed in suitable
environmental conditions.
[0342] As explained above, another type of input device which may
be included with a locate receiver (or locate transmitter) is an
operational sensor. Thus, according to one aspect of the present
invention and as shown in FIG. 15, the locate receiver 1510 may
include one or more operational sensors 1530 for sensing one or
more operating conditions or characteristics of the locate
receiver.
[0343] FIG. 17 is a block diagram showing details of the
operational sensors shown in FIG. 15, according to one embodiment
of the present invention. The illustrated exemplary operational
sensors 1530 include, but are not limited to, one or more
temperature sensors 1702, a compass 1704, an inclinometer 1706, one
or more accelerometers 1708, a yaw rate sensor 1710, a proximity
sensor 1712, a pressure sensor 1714, one or more device health
sensors 1716, the image capture device 1610, and the audio recorder
1612. Additional or alternative operational sensors may be
included, and one or more of the illustrated operational sensors
may be omitted, in some embodiments. The operational sensors may be
coupled to the processor 118 to receive control signals from the
processor 118 and/or to provide their respective outputs to the
processor 118, and, as described further below, may operate in one
of various suitable manners. Information provided by any of the
operational sensors may be stored in local memory 122, for example
in an electronic record 1802, described below, and/or transmitted
to an external device, such as the remote computer 150, remote
storage, etc.
[0344] One or more operational temperature sensors 1702 may be
configured to sense any temperature of interest with respect to the
locate receiver 1510. For example, it may be desirable in some
embodiments to monitor the temperature of the processing circuitry
of the locate receiver 1510, such as the temperature of the
processor 118. Alternatively, it may be desirable in some
embodiments to monitor the temperature of other components of the
locate receiver 1510, for example, the temperature of one of the
other operational sensors 1530. Thus, it should be appreciated that
a plurality of operational temperature sensors 1702 may be included
and arranged to sense any operating temperatures of interest of the
locate receiver 1510. In this manner, the operating temperatures of
one or more components of the locate receiver 1510 may be monitored
and an alert or notification may be generated (e.g., by the control
electronics) and provided to the technician if one of the operating
temperatures is determined to be outside of an acceptable
tolerance, for example if a component is overheating.
Alternatively, the temperature from one or more operational
temperature sensors 1702 may be used to calibrate or compensate
data or signals provided by any one of the other sensors which may
have a temperature-dependent output.
[0345] The temperature sensor(s) 1702 may be any suitable
temperature sensor, such as a temperature-dependent variable
resistor, or any other type of temperature sensor suitable for
measuring the temperature of the components of interest of the
locate receiver. The temperature sensor 1702 may be configured to
operate over any suitable temperature range of interest, which in
one embodiment may be from -40'F to 125.degree. F., although other
temperature ranges may be employed in other embodiments. The data
output by the temperature sensor 1702 may be stored in local memory
122 and/or may be transmitted to an external device, such as remote
computer 150, in those embodiments in which the locate receiver
1510 is communicatively coupled to the external device.
[0346] The compass 1704 may be configured to determine the
direction in which the locate receiver 1510 is facing, and
therefore may be positioned at one of various suitable locations.
For example, according to one embodiment, the compass 1704 may be
positioned toward the top of the locate receiver 1510, and aligned
such that the compass identifies the direction toward which the
front of the locate receiver points (i.e., the direction in which
the locate receiver faces when held by the technician). The heading
information provided by the compass 1704 may be provided in degrees
or in any other suitable units, and may be provided relative to a
reference direction (e.g., relative to true North). According to
one embodiment, the compass may be initially calibrated to true
North, such that subsequent heading readings may be relative to
true North.
[0347] The heading information provided by the compass 1704 may be
useful to determine a direction in which the technician moves
during a locate operation. Such information may be particularly
useful in instances in which the location tracking system 130 does
not provide a signal or a sufficiently accurate signal to monitor
the technician's movements. The compass 1704 may be any suitable
type of compass, including analog or digital, and may provide any
suitable readout. According to one embodiment, the compass 1704 is
a digital compass, which provides a heading of the locate receiver
1510. According to one embodiment, the compass may include one or
more gyroscopes. According to one embodiment, the compass 1704 is
an OS4000-T solid state tilt compensated nano compass available
from OceanServer Technology, Inc. of Fall River, Massachusetts. The
information provided by the compass 1704 may be stored in local
memory 122 and/or transmitted to an external device, such as the
remote computer 150.
[0348] The inclinometer 1706 may be any suitable inclinometer
configurable to measure an angle of inclination of the locate
receiver 1510. According to one embodiment, the inclinometer may
provide an angle with respect to ground. According to one
embodiment, the inclinometer may be a multi-axis digital device and
may sense angles with respect to horizontal and/or vertical planes.
The inclinometer may provide a voltage as an output signal,
indicative of the angle of inclination. According to some
embodiments, the inclinometer may have an output range spanning
+/-30 degrees (e.g., with respect to ground), although other ranges
may alternatively be provided by some inclinometers.
[0349] The inclinometer 1706 may be positioned toward the top of
the locate receiver 1510, for example, near where the technician
may hold the locate receiver during use. Alternatively, according
to another embodiment, the inclinometer may be positioned
substantially near the tip of the locate receiver 1510 (i.e., the
end of the locate receiver held proximate the ground when the
locate receiver is in use) which may be substantially the same as
the tip 148 of locate receiver 110 shown in FIG. 5. Other locations
for the inclinometer with respect to the locate receiver are also
possible.
[0350] The information provided by the inclinometer may be useful
for one or more of various purposes. For example, according to one
embodiment, the information about the angle of the locate receiver
may be useful in determining whether the technician is
appropriately using the locate receiver (e.g., for determining
whether the locate receiver is being held at a suitable angle
relative to the surface (e.g., the ground) under which a facility
is disposed), and in some instances may therefore be used to
disable part of the locate receiver (e.g., detection electronics
131) if the technician is holding the locate receiver at an
inappropriate angle. According to another embodiment, as described
in further detail below in connection with FIG. 22, the information
about the angle of the locate receiver may be used to determine the
location of one point of the locate receiver relative to a second
point of the locate receiver (e.g., for use in determining the
relative positioning of the tip of the locate receiver compared to
the top of the locate receiver). The information provided by the
inclinometer may be stored in local memory 122 and/or transmitted
to an external device, such as the remote computer 150.
[0351] One or more accelerometers 1708 may be configured to sense
the acceleration of the locate receiver 1510 and may provide an
output in terms of g-force or in any other suitable units. Such
information may be useful, for example, in assessing whether a
technician is appropriately using (e.g., physically moving or
manipulating) the locate receiver 1510. For example, there may be
predetermined acceptable acceleration ranges associated with normal
operation of the locate receiver (e.g., associated with the typical
sweeping motion of the locate receiver as the technician scans for
a buried facility), and therefore the accelerometer(s) 1708 may
provide information which may be used to assess whether a
technician is operating the locate receiver 1510 within those
acceptable ranges. In addition, any acceleration data provided by
the accelerometer(s) may be integrated to obtain velocity data
and/or integrated twice to obtain data about distance traveled
(e.g., via appropriate functionality included in the locate data
algorithm 137 or other algorithm executed by the processor 118),
either of which integration results may be useful for a variety of
reasons. The acceleration information provided by the
accelerometer(s) 1708 may be stored in local memory 122 and/or
transmitted to an external device, such as the remote computer
150.
[0352] The accelerometer(s) 1708 may be any suitable accelerometer
for sensing the acceleration of the locate receiver and may provide
any suitable outputs. According to one embodiment, the
accelerometer may be a 3-axis accelerometer, providing an
indication of the acceleration of the locate receiver along three
orthogonal axes. The output of each axis may be a frequency (e.g.,
in Hz) or may be converted to units of g. For example, in one
embodiment the accelerometer may be a 3-axis accelerometer that
outputs a signal ranging from 0.5 Hz-550 Hz for the z-axis, from
0.5 Hz-1600 Hz for the x-axis, and from 0.5 Hz-1600 Hz for the
y-axis. Again, the accelerometer may alternatively provide an
output in terms of g or any other suitable units. In one exemplary
implementation, an accelerometer may be an ADXL 330KCPZ-RL
accelerometer available from Analog Devices of Norwood, Mass. In
some exemplary implementations, the accelerometer may output
acceleration data, whereas in other implementations the
accelerometer may output velocity data along each of the three
axes, as well as the orientation of the accelerometer.
[0353] In addition to providing acceleration data, an accelerometer
may be operated as an inclinometer according to known techniques
(see, e.g., description at
http://www.tilt-china.com/uploadPDF/How_to_use_an_accelerometer_as_an_inc-
linometer.pdf, viewed on Jan. 27, 2010 and prepared by Shanghai
Vigor Technology Development Co.). Thus, according to one
embodiment of the present invention, a locate receiver may include
an accelerometer configured to function as an inclinometer and
therefore provide a measure of inclination of the locate
receiver.
[0354] Furthermore, as explained in greater detail below, the
locate receiver 1510 may comprise a plurality of accelerometers
located at different positions with respect to the locate receiver.
Information from such accelerometers may be useful, for example, in
assessing the relative motion of one portion (e.g., the tip) of the
locate receiver with respect to a second portion (e.g., the top) of
the locate receiver, for example using the techniques described in
U.S. Patent Application Publication 2008-0255795-A1, published Oct.
16, 2008, which is hereby incorporated herein by reference in its
entirety. According to one such non-limiting embodiment, one
accelerometer may be positioned near the tip of the locate receiver
and a second accelerometer may be positioned near the top of the
locate receiver. Both may be 3-axis accelerometers. Such an
arrangement may also be used to determine the location of the tip
of the locate receiver relative to the location of the top of the
locate receiver, as explained below in connection with FIG. 22.
[0355] Additionally, the data output by one or both accelerometers
may be used to monitor for out-of-tolerance operation of the locate
receiver, such as improper manipulation of the locate receiver by
the technician. For example, acceleration data from either
accelerometer may be indicative of whether the locate receiver is
being swung, thrown, or dropped, among other things. For example,
acceleration values from either accelerometer above some threshold
value for a sufficient duration (e.g., for one second or greater,
or any other suitable duration) may be indicative of the locate
receiver being thrown or dropped. The threshold value of
acceleration indicative of such behavior may be different for the
two accelerometers. Similarly, detection of acceleration values
deviating from an expected or target pattern may be indicative of
misuse of the locate receiver. In response to detecting such
manipulation of the locate receiver, various actions may be taken,
such as generating an alert, logging an event, disabling the
actuation system and/or detection electronics 131 of the locate
receiver, or any of the actions described further below.
[0356] Moreover, a locate receiver may be provided with two
accelerometers to monitor whether the locate receiver is being held
in a satisfactory manner during use. For example, it may be
preferable for a locate receiver to be maintained at a
substantially perpendicular angle relative to ground as a
technician is locating, even when the technician is moving (e.g.,
sweeping or swinging) the locate receiver. It should be appreciated
that when operated in such a manner, the top of the locate receiver
and the tip of the locate receiver may exhibit similar acceleration
characteristics (e.g., peaks in acceleration at the same time
(e.g., at the same points of a swinging motion), minimum values of
acceleration at the same time (e.g., at the same points of a
swinging motion), etc.) By positioning an accelerometer toward the
tip of the locate receiver and another toward the top of the locate
receiver, the resulting acceleration data may be indicative of
whether the technician is holding the locate receiver perpendicular
to ground or otherwise properly manipulating the locate
receiver.
[0357] Other uses for multiple accelerometers on a locate receiver
are also possible, and those examples listed above are
non-limiting.
[0358] The operational sensors 1530 may further comprise a yaw rate
sensor 1710, which may be configured to sense the yaw rate (i.e., a
twisting motion) of the locate receiver. The yaw rate sensor may be
any suitable yaw rate sensor and may provide its output in any
suitable units, for example in degrees per second (degrees/sec).
One non-limiting example of a suitable yaw rate sensor is an
ADXRS610BBGZ-RL gyro sensor from Analog Devices of Norwood, Mass.
According to another embodiment, a yaw rate measurement may be
provided by some types of compasses, such that a combination
compass and yaw rate sensor may be used. The yaw rate sensor may be
positioned at any suitable location on the locate receiver to
detect yaw rate. The information provided by the yaw rate sensor
1710 may be stored locally and/or transmitted to an external device
such as the remote computer 150.
[0359] The proximity sensor 1712 may be configured to measure the
distance from any point of interest of the locate receiver 1510 to
a point of interest in its surroundings. For example, in one
embodiment, the proximity sensor 1712 may be positioned at the tip
of the locate receiver, and may be oriented to determine the
distance between the tip of the locate receiver and any surface
(e.g., a target surface) of interest, such as the ground, a
landmark, a wall, etc. Alternatively, in one embodiment, the
proximity sensor may be positioned toward the top of the locate
receiver and oriented to determine a distance between the top of
the locate receiver and the target surface (e.g., ground). Other
configurations are also possible.
[0360] Information about the distance from the locate receiver to
any surrounding surface may be useful for one of various reasons.
For example, such information may be useful in assessing whether a
technician is properly operating the locate receiver. As a
non-limiting example, there may be predetermined acceptable
distances between the locate receiver and the surface under which a
facility is located when scanning for the facility. As an example,
it may be preferable in some embodiments to hold the locate
receiver between one and twelve inches from the surface. The
proximity sensor may be used to determine whether the technician is
maintaining the locate receiver at an acceptable distance from the
surface. Alternatively, according to another embodiment, and as
described in greater detail below, the distance of a portion of the
locate receiver from the ground may be useful in determining the
distance between two points of the locate receiver.
[0361] The proximity sensor 1712 may be any suitable type of
proximity sensor (e.g., any commercially available proximity
sensor), including an analog or digital device. In one embodiment,
proximity sensor 1712 may be a Sharp GP2D120 short range IR
distance sensor from Sharp Electronics Corporation (Mahwah, N.J.)
and is able to take a substantially continuous distance reading and
return a corresponding analog voltage with a range of about 1.6
inches to about 12 inches. Such a proximity sensor may be suitable,
for example, when the sensor is used to sense the distance from the
tip of the locate receiver to the ground, since such a distance may
typically be less than about 12 inches. According to another
embodiment, the proximity sensor may be a sonar device. Other types
of proximity sensors may also be suitably used. The information
provided by the proximity sensor 1712 (e.g., a distance value, for
example, in centimeters, meters, or feet) may be stored locally
and/or transmitted to an external device such as the remote
computer 150.
[0362] The pressure sensor 1714 may be configured to sense any
pressure of interest with respect to the locate receiver. For
example, according to one embodiment it may be desirable to detect
the pressure applied to a handle of the locate receiver (e.g.,
handle 138 in FIG. 5), for instance to determine whether a
technician is holding the locate receiver and, if so, whether it is
being held appropriately. Accordingly, a pressure sensor may be
positioned in the handle of the locate receiver in one non-limiting
embodiment and configured to detect the pressure applied to the
handle. According to another embodiment, it may be desirable to
determine the pressure applied to an actuation system of the locate
receiver, for example if the actuation system is a trigger (e.g.,
actuator 142 in FIG. 5). Accordingly, a pressure sensor may be
configured to determine the pressure applied to the trigger or
other actuation mechanism in those embodiments in which the locate
receiver includes such a trigger or actuation mechanism. According
to one embodiment, the locate receiver may include multiple
pressure sensors, for example one for determining the pressure
applied to a handle of the locate receiver and one for determining
a pressure applied to an actuation system of the locate receiver.
However, any number of pressure sensors may be included, and they
may be configured to sense any pressure of interest with respect to
the locate receiver.
[0363] The pressure sensor 1714 may be any suitable type of
pressure sensor for detecting the pressure of interest. The
information provided by the pressure sensor 1714, which may be in
any suitable units, may be stored locally and/or transmitted to an
external device such as the remote computer 150.
[0364] The locate receiver may further include device health
monitoring capability. Characteristics of the health of the locate
receiver which may be the subject of monitoring include, but are
not limited to, battery life, battery drain level, battery charging
capacity, wireless signal strength (in those embodiments in which
the locate receiver has wireless capabilities), network
connectivity, operating temperature, available memory, and the
status of any one or more input devices of the locate receiver,
such as an accelerometer, location tracking system (e.g., GPS
receiver), image capture device, light sensor, etc. To this end,
the locate receiver may include hardware and/or software configured
to serve the health monitoring purpose.
[0365] According to one embodiment, the locate receiver may include
a processor (e.g., processor 118) configured to run a device health
software program or application to process the inputs from one or
more operational sensors, such as operational temperature sensor
1702, to assess whether those inputs indicate the locate receiver
is operating appropriately. According to another embodiment, the
locate receiver may include dedicated device health hardware, such
as device health sensor 1716, which may provide data that is
processed by a device health software program (for example,
executing on processor 118) to assess the health of the locate
receiver. Non-limiting examples of device health sensor 1716
include a voltmeter and an ammeter, among others.
[0366] In one embodiment, data provided by the device health sensor
1716 may indicate that a low battery condition is present during
the locate operation and, thus, it may be determined that the
operations of the locate receiver are not reliable. Other device
conditions, such as wireless signal strength (e.g., in those
embodiments in which the locate receiver 1510 is wirelessly coupled
to an external device, such as remote computer 150), available
memory, temperature of one or more components of the locate
receiver, power connection of one or more components of the locate
receiver, or other conditions of the locate receiver may be
monitored by a device health sensor. Thus, it should be appreciated
that a locate receiver according to the embodiments described
herein may include any suitable number of device health sensors for
monitoring a desired number of device conditions.
[0367] According to one embodiment, a record or message may be
created based on operation of the device health sensor. For
example, a record or message may be created including a device ID
(e.g., of the locate receiver) and the current state of certain
device components, such as input devices (e.g., environmental and
operational sensors). The record or message may also or
alternatively include an identification of any resource utilization
that is nearing a specified threshold (e.g., memory nearing
capacity). Thus, it should be appreciated that various conditions
may be monitored under the rubric of monitoring the health of the
locate receiver, and various actions taken in response to such
monitoring.
[0368] The operational sensors 1530 may further comprise the image
capture device 1610. As previously mentioned, the image capture
device 1610 may be considered an operational sensor, for example,
if and when configured to capture an image relating to the
operation of the locate receiver 1510.
[0369] Furthermore, the operational sensors 1530 may comprise an
audio recorder, similar to or the same as audio recorder 1612, and
therefore shown as audio recorder 1612 in FIG. 17. For example, the
locate receiver may include multiple audio recorders, with one or
more operating as an environmental sensor (e.g., recording acoustic
input from the environment) and one or more operating as
operational sensors (e.g., recording acoustic input relating to
operation of one or more components of the locate receiver.
According to one embodiment, a microphone associated with the audio
recorder is positioned to detect sound emitted by a component of
interest of the locate receiver. The audio input may also be stored
by the audio recorder and processed in any suitable manner.
[0370] As previously described, the audio recorder may be any
suitable audio recorder, including a digital audio recorder or
analog audio recorder, for example of any of the types previously
described. In one embodiment, the audio recorder may comprise a
dedicated PIC processor. In those embodiments in which the locate
receiver includes two or more audio recorders (e.g., one operating
an as environmental sensor and another operating as an operational
sensor), the audio recorders may share any suitable combination of
circuitry. For example, multiple audio recorders may share a same
digital signal processor (e.g., a dedicated audio signal
processor). A separate microphone may be associated with each audio
recorder, or a microphone may be shared between two or more audio
recorders. Thus, it should be appreciated that the exact
configuration and components of audio recorders according to the
various embodiments described herein are not limiting.
[0371] The audio files produced by an audio recorder operating as
an operational sensor may be stored locally in dedicated audio
memory, in local memory 122 and/or transmitted to an external
device, such as the remote computer 150.
[0372] In any of the embodiments illustrated in FIG. 15, any one or
more of the environmental sensors 1520 illustrated in FIG. 16
and/or operational sensors 1530 illustrated in FIG. 17 may be
operated in any suitable manner, including continuously,
periodically, and/or in response to an event or trigger (e.g., one
or more actuations of the locate receiver), or in any other
suitable manner. For example, one or more of the environmental
sensors 1520 and/or operational sensors 1530 may operate
continuously during performance of a locate operation. In
particular, the ambient temperature sensor may output a
substantially continuous data stream indicative of the sensed
ambient temperature. Similarly, the surface temperature sensor,
humidity sensor, and light sensor may output substantially
continuous data streams indicative of the respective sensed
conditions. The inclinometer, compass, accelerometer, yaw rate
sensor, proximity sensor, pressure sensor, and device health sensor
may also output substantially continuous data streams indicative of
the sensed operation. The image capture device 1610 may record a
video sequence continuously during the locate operation, and the
audio recorder 1612 may continuously record any audio input during
performance of the locate operation.
[0373] Alternatively, one or more of the environmental sensors 1520
and/or operational sensors 1530 may be operated and/or polled
periodically, with the resulting output data being logged and/or
transmitted periodically. For example, the ambient temperature
sensor may provide an output signal indicative of the sensed
ambient temperature every second, every five seconds, every ten
seconds, every minute, every ten minutes, or at any other suitable
time interval. Similarly, the surface temperature sensor, humidity
sensor, light sensor, operational temperature sensor(s),
inclinometer, compass, accelerometer(s), yaw rate sensor, proximity
sensor, pressure sensor, and device health sensor(s) may output
data at periodic intervals. The image capture device may capture a
still image or a video sequence of any desired duration at periodic
intervals. The audio recorder may capture audio of any desired
duration at periodic intervals. It should be appreciated that in
some embodiments one or more of the environmental sensors 1520
and/or operational sensors 1530 may themselves operate so as to
provide output information in an essentially continuous fashion,
but only be read or polled (e.g., by processor 118) on some
discrete or periodic basis. Accordingly, output signals or data
provided by one or more sensors may be acquired, logged into local
memory, and/or transmitted to an external device in any of a
variety of manners.
[0374] According to another embodiment, one or more of the
environmental sensors 1520 and/or operational sensors 1530 may
operate, be read discretely, and/or be polled, and therefore the
corresponding data may be logged and/or transmitted, in response to
actuation of the actuation system 120 of the locate receiver. For
example, actuation of the actuation system 120 may trigger
collection of magnetic field data and simultaneously may trigger
recording of a sensed ambient temperature from ambient temperature
sensor 1602 in the local memory 122. The remaining environmental
sensors 1520 and/or operational sensors 1530 may be operated, read
and/or polled in a similar manner.
[0375] In one embodiment, one or more of the environmental sensors
1520 and/or operational sensors 1530 may be activated, read
discretely, and/or polled by the technician irrespective of whether
the actuation system 120 is actuated. For example, the technician
may activate, read, and/or poll one or more of the environmental
sensors by depressing a selection button corresponding to the
environmental sensor(s), by choosing a selection button or menu
option from a user interface of the locate receiver (in those
embodiments in which the locate receiver includes a user
interface), or in any other suitable manner. The operational
sensors may operate similarly.
[0376] Thus, it should be appreciated that the operation of
sensors, and reading and/or logging and/or transmitting of data
from the environmental sensors 1520 and operational sensors 1530,
is not limited to any particular manner or time, but rather that
various suitable schemes are contemplated. Also, it should be
appreciated that in those embodiments in which a locate receiver
comprises multiple sensors, the sensors need not operate in the
same manner as each other. For example, one or more of the sensors
may operate periodically while one or more may only provide their
data output in response to actuation of the locate receiver
actuation system. In one embodiment, a plurality of the sensors may
provide their data outputs periodically, but at different rates. As
an example, the accelerometers and yaw rate sensor of the locate
receiver may output their data at relatively high frequencies, such
as in the kHz range, MHz range, or higher. The temperature sensors,
humidity sensor, and light sensor may output their data at
relatively lower frequencies, such as approximately 1 Hz, for
example because those quantities may not change as rapidly as the
quantities measured by the accelerometers and the yaw rate sensor.
Other operating schemes are also possible.
[0377] According to one embodiment, the output data from the
sensors is only read and stored upon actuation of the actuation
system 120, even though the sensors may update their outputs at the
above-indicated frequencies or any other suitable frequencies. Upon
such actuation, data from any one or more of the sensors may be
read out and stored in memory. The stored data may therefore
represent the values present at the sensors at the time of
actuation. In this manner, data values output by the sensors when
the trigger is not actuated may not be stored in some instances,
but rather may be updated by the subsequent data value from the
sensor. In this manner, only the most recent data from the sensors
may be stored upon actuation. Other operating schemes are also
possible.
[0378] As mentioned previously, environmental information and/or
operational information output by any one or more environmental
sensors and operational sensors of the locate receiver (e.g., of
the environmental sensors 1520 and/or operational sensors 1530) may
be used for one or more of various purposes, some of which have
been previously described. Examples of such purposes include
assessing whether a locate operation was or is being performed
within environmental and/or operational tolerances, interacting
with the technician and/or controlling/altering operation of the
locate receiver, and augmenting data records/files.
[0379] To this end, the various environmental information and/or
operational information provided by various sensors may be
organized and handled as data in various formats, and in some
implementations may be organized in terms of events and
corresponding event entries formatted according to a particular
protocol, for example as discussed above in connection with Tables
2 through 5. Event entries similar to these and including various
environmental and/or operational information may be generated by
the locate receiver at some point once information has been
read/acquired from environmental and/or operational sensors, the
event entries themselves (or any information contained therein) may
be logged in a file for an electronic record, and/or the event
entries themselves (or any information contained therein) may be
transmitted by the locate receiver (e.g., to remote computer
150).
[0380] In some implementations, environmental information and/or
operational information may be contained within one or more event
entries corresponding to an actuation of the locate receiver, such
that the environmental information and/or the operational
information is part of an actuation data set. Table 12 below
illustrates a modification of an event entry originally depicted in
Table 3 above, in which environmental information and operational
information is included as part of the data formatted in an
actuation event entry, according to one example. The information
for acceleration may include three values for each axis of each
accelerometer. One value for a particular axis may be a raw value,
the second value for a particular axis may be a high-pass filtered
value, and the third value may be a low-pass filtered value. Data
values are only shown for one of the two accelerometers listed.
Locate information from one or more input devices/other components
of the locate receiver is recorded with these events to provide
information about the job in progress.
TABLE-US-00015 TABLE 12 Format INFO+ LCTR: (DATE) (TIME) (GPS data)
(FACILITY TYPE) (GROUND TYPE) (MAGNETIC FIELD STRENGTH AS % OF FULL
SCALE info) (DETECTED SIGNAL FREQUENCY) (GAIN) (AMB TEMP info)
(SURF TEMP info) (HUM info) (LIGHT info) (ALTITUDE info) (IMAGE
info) (AUDIO info) (OP TEMP info) (COMPASS info) (INCL info) (ACC1
info) (ACC2 info) (YAW info) (PROX info) (DH1 info) (DH2 info)
<CR><LF> Examples INFO+LCTR: DATE(2009-04-15)
TIME(12:04:44) GPS($GPGGA, 120443, 4807.038, N, 01131.000, E, 1,
08, 0.9, 545.4, M, 46.9, M,, *47) FACILITY TYPE (YELLOW) GROUND
TYPE (PAVEMENT) STRENGTH(80) FREQUENCY(512) GAIN (10) AMB TEMP(73F)
SURF TEMP(78F) HUM(32) LIGHT(1500) ALT(200) IMAGE(Y) AUDIO(Y) OP
TEMP(97F) COMPASS(243) INCL(-20) ACC1_x_raw(.287) ACC1_x_high(.283)
ACC1_x_low(.275) ACC1_y_raw(.385) ACC1_y_high(.382)
ACC1_y_low(.381) ACC1_z_raw(.153) ACC1_z_high(.150)
ACC1_z_low(.145) (ACC2(!) YAW(!) PROX(15) DH1(67) DH2(!)
<CR><LF> INFO+LCTR: DATE(2009-04-15) TIME(12:04:45)
GPS($GPGGA, 120445, 4807.038, N, 01131.000, E, 1, 08, 0.9, 545.4,
M, 46.9, M,, *47) FACILITY TYPE (YELLOW) GROUND TYPE (GRASS)
STRENGTH(81) FREQUENCY (512) GAIN (10) AMB TEMP(73F) SURF TEMP(78F)
HUM(31) LIGHT(1500) ALT(200) IMAGE(Y) AUDIO(Y) OP TEMP(97F)
COMPASS(243) INCL(-20) ACC1_x_raw(.285) ACC1_x_high(.280)
ACC1_x_low(.275) ACC1_y_raw(.385) ACC1_y_high(.385)
ACC1_y_low(.380) ACC1_z_raw(.156) ACC1_z_high(.150)
ACC1_z_low(.145) ACC2(!) YAW(!) PROX(14) DH1(67) DH2(!)
<CR><LF> INFO+LCTR: DATE(2009-04-15) TIME(12:04:46)
GPS($GPGGA, 120446, 4807.038, N, 01131.000, E, 1, 08, 0.9, 545.4,
M, 46.9, M,, *47) FACILITY TYPE (YELLOW) GROUND TYPE (DIRT)
STRENGTH(80) FREQUENCY(512) GAIN (11) AMB TEMP(73F) SURF TEMP(78F)
HUM(31) LIGHT(1500) ALT(200) IMAGE(Y) AUDIO(Y) OP TEMP(97F)
COMPASS(243) INCL(-20) ACC1_x_raw(.285) ACC1_x_high(.380)
ACC1_x_low(.275) ACC1_y_raw(.385) ACC1_y_high(.382)
ACC1_y_low(.390) ACC1_z_raw(.155) ACC1_z_high(.150)
ACC1_z_low(.147) ACC2(!) YAW(!) PROX(15) DH1(67) DH2(!)
<CR><LF>
[0381] The contents of an information field for a particular piece
of environmental information and/or operational information in an
event entry may have any of a number of forms; for example, the
content may be strictly numeric (e.g., according to some
predetermined scale/units of measure for the numeric information),
alphanumeric (e.g., 78F), text (e.g., YES), symbolic (e.g., Y or N
to indicate "yes" or "no," or some other symbol to provide an
indication, such as ! to indicate sensor failure or no sensor
information available), or referential in nature (e.g., a filename,
pointer or other link to provide an indication of where relevant
information relating to the particular environmental and/or
operational condition may be found).
[0382] In other implementations, one or both of environmental
information and/or operational information may be formatted in one
or more particular event entries generated specifically to provide
such information, in a manner that is not necessarily related to
actuation of the locate receiver. For example, such "sensor read
events" may be generated as the result of the processor reading one
or more environmental and/or operational sensors one or more times
while a job is in progress (e.g., on a periodic basis pursuant to
processor polls). Table 13 below provides an example of such a
sensor read event entry.
TABLE-US-00016 TABLE 13 Format INFO+SENSOR: (DATE) (TIME) (AMB TEMP
info) (SURF TEMP info) (HUM info) (LIGHT info) (IMAGE info) (AUDIO
info) (OP TEMP info) (COMPASS info) (INCL info) (ACC1 info) (ACC2
info) (YAW info) (PROX info) (PRESSURE info) (DH1 info) (DH2 info)
<CR><LF> Examples INFO+SENSOR: DATE(2009-04-15)
TIME(12:04:45) AMB TEMP(73F) SURF TEMP(78F) HUM(31) LIGHT(1500)
IMAGE(Y) AUDIO(Y) OP TEMP(97F) COMPASS(243) INCL(-40) ACC1(.285)
ACC2(!) YAW(!) PROX(15) PRESSURE (54) DH1(67)
DH2(!)<CR><LF>
[0383] With respect to file formats for electronic records
including event entries or information derived therefrom, as
discussed above any number of file formats may be employed (e.g.,
ASCII, XML).
[0384] FIG. 18 illustrates an electronic record 1802, similar to
the electronic record 135 previously described in connection with
FIGS. 7 and 9, which may be generated by a locate receiver 1510,
stored in local memory 122 of the locate receiver, and/or
transmitted in whole or part by the locate receiver, according to
one embodiment. Some or all of the information provided in the
electronic record 1802 may be derived from an event entry generated
by the locate receiver (e.g., an event entry is generated and then
parsed to provide information in various fields of an electronic
record), or the information contained in the electronic record 1802
may be provided in another manner pursuant to the concepts
disclosed herein (e.g., sensor information may be acquired directly
from one or more sensors, and acquired information may be stored in
the electronic record without necessarily generating an event
entry). In addition to the information elements shown previously in
FIGS. 7 and 9, the electronic record 1802 may further include one
or both of environmental information 1804 and operational
information 1806. While both types of information are shown for
simplicity in FIG. 18, it should be appreciated that an electronic
record according to various embodiments need not include both
environmental information and operational information.
[0385] The exemplary electronic record 1802 shown in FIG. 18 may be
used to evaluate performance of a locate operation, for example, by
reviewing information in the actuation data set 702C, the ticket
information 714, service-related information 716, the environmental
information 1804 and/or the operational information 1806. It should
be appreciated that the electronic record 1802 includes some
information that assumes that the locate receiver 1510 includes the
timing system 128 and the location tracking system 130, such as the
timing and location information shown in the electronic record.
[0386] Table 14 provides an example of a data record that may be
generated by locate receiver 1510 upon actuation of the actuation
system. Each shown "act" corresponds to a separate actuation. As
shown, the data record may include information about the service
provider identification, the user (technician) identification, the
locate receiver identification, the receiver mode, a timestamp (for
example, provided by a timing system such as timing system 128),
geo-location data, signal strength data, gain of the locate
receiver, signal frequency data, facility depth data, facility type
data, ground type data, locate request data, and information
relating to the environmental sensors 1520. This example is
provided for purposes of illustration, and is not limiting, as many
different forms of data records may be generated based on the
operation of the locate receiver 1510.
TABLE-US-00017 TABLE 14 Example record of data acquired by locate
receiver 1510 upon actuation Record Service provider ID 0482 #
act-1 User ID 4815 Receiver ID 7362 Receiver Mode Mode = Peak
Receiver Mode ACTIVE Timestamp data 12-Jul-2008; 09:35:15.2
Geo-location data 2650.9348, N, 08003.5057, W Signal strength (% of
85 maximum) Gain 45 Signal frequency (kHz) 1 Facility depth
(meters) 3.4 Facility type Gas (yellow) Ground type Pavement Locate
request data Requestor: XYZ Construction Company, Requested service
address: 222 Main St, Orlando, FL Ambient temperature 75 (.degree.
F.) Surface temperature 80 (.degree. F.) Humidity (%) 85
Illuminance (lux) 15000 Altitude (meters) 200 Image captured (Y/N)
Y Audio captured (Y/N) N Record Service provider ID 0482 # act-2
User ID 4815 Receiver ID 7362 Receiver Mode Mode = Peak Receiver
Mode ACTIVE Timestamp data 12-Jul-2008; 09:35:17.5 Geo-location
data 2650.9448, N, 08203.5057, W Signal strength (% of 83 maximum)
Gain 45 Signal frequency (kHz) 1 Facility depth (meters) 3.3
Facility type Gas (yellow) Ground type Pavement Locate request data
Requestor: XYZ Construction Company, Requested service address: 222
Main St, Orlando, FL Ambient temperature 75 (.degree. F.) Surface
temperature 80 (.degree. F.) Humidity (%) 84 Illuminance (lux)
15500 Altitude (meters) 200 Image captured (Y/N) Y Audio captured
(Y/N) N Record Service provider ID 0482 # act-3 User ID 4815
Receiver ID 7362 Receiver Mode Mode = Peak Receiver Mode ACTIVE
Timestamp data 12-Jul-2008; 09:35:18.7 Geo-location data 2650.9358,
N, 08003.5067, W Signal strength (% of 86 maximum) Gain 45 Signal
frequency (kHz) 1 Facility depth (meters) 3.4 Facility type Gas
(yellow) Ground type Pavement Locate request data Requestor: XYZ
Construction Company, Requested service address: 222 Main St,
Orlando, FL Ambient temperature 74 (.degree. F.) Surface
temperature 81 (.degree. F.) Humidity (%) 85 Illuminance (lux)
15200 Altitude (meters) 200 Image captured (Y/N) Y Audio captured
(Y/N) N
[0387] In a manner similar to Table 14, Table 15A provides another
example of a data record that may be generated by locate receiver
1510 upon actuation of the actuation system. Each shown "act"
corresponds to a separate actuation. As shown, the data record may
include information about the service provider identification, the
user (technician) identification, the locate receiver
identification, the receiver mode, a timestamp (for example,
provided by a timing system such as timing system 128),
geo-location data, signal strength data, gain of the locate
receiver, signal frequency data, facility depth data, facility type
data, ground type data, locate request data, and information
relating to the operational sensors 1530. The location tracking
system 130 provides the geo-location data. The temperature
sensor(s) 1702 provides the temperature data. The compass 1704
provides the heading. The inclinometer 1706 provides the
inclination. The accelerometer(s) 1708 provides the acceleration,
and in this embodiment is a 3-axis accelerometer. The yaw rate
sensor 1710 provides the yaw rate. The proximity sensor 1712
provides the distance, which may represent the distance from the
tip of the locate receiver to the ground, in one non-limiting
embodiment. The pressure sensor 1714 provides the pressure
measurement. This example is provided for purposes of illustration,
and is not limiting, as many different forms of data records may be
generated based on the operation of the locate receiver 1510.
TABLE-US-00018 TABLE 15A Example record of data acquired by locate
receiver 1510 upon actuation Record Service provider ID 0482 #
act-1 User ID 4815 Receiver ID 7362 Receiver Mode Mode = Peak
Receiver Mode ACTIVE Timestamp data 12-Jul-2008; 09:35:15.2
Geo-location data 2650.9256, N, 08003.5234, W Signal strength (% of
86 maximum) Gain 45 Signal frequency (kHz) 1 Facility depth
(meters) 3.4 Facility type Gas (yellow) Ground type Pavement Locate
request data Requestor: XYZ Construction Company, Requested service
address: 222 Main St, Orlando, FL Temperature (.degree. F.) 75
Heading (degrees) 243 Inclination (degrees) 25 Acceleration (g)
(x-axis) 0.75 Acceleration (g) (y-axis) 1.20 Acceleration (g)
(z-axis) 0.90 Yaw rate (degrees/sec) 10 Distance (cm) 15 Pressure
(pounds/in.sup.2) 45 Image captured (Y/N) Y Audio captured (Y/N) N
Record Service provider ID 0482 # act-2 User ID 4815 Receiver ID
7362 Receiver Mode Mode = Peak Receiver Mode ACTIVE Timestamp data
12-Jul-2008; 09:35:17.5 Geo-location data 2650.9256, N, 09003.5234,
W Signal strength (% of 86 maximum) Gain 45 Signal frequency (kHz)
1 Facility depth (meters) 3.4 Facility type Gas (yellow) Ground
type Pavement Locate request data Requestor: XYZ Construction
Company, Requested service address: 222 Main St, Orlando, FL
Temperature (.degree. F.) 75 Heading (degrees) 243 Inclination
(degrees) 25 Acceleration (g) (x-axis) 0.80 Acceleration (g)
(y-axis) 1.50 Acceleration (g) (z-axis) 0.70 Yaw rate (degrees/sec)
9 Distance (cm) 14 Pressure (pounds/in.sup.2) 48 Image captured
(Y/N) Y Audio captured (Y/N) N Record Service provider ID 0482 #
act-3 User ID 4815 Receiver ID 7362 Receiver Mode Mode = Peak
Receiver Mode ACTIVE Timestamp data 12-Jul-2008; 09:35:18.7
Geo-location data 2650.9256, N, 08003.5234, W Signal strength (% of
86 maximum) Gain 45 Signal frequency (kHz) 1 Facility depth
(meters) 3.5 Facility type Gas (yellow) Ground type Pavement Locate
request data Requestor: XYZ Construction Company, Requested service
address: 222 Main St, Orlando, FL Temperature (.degree. F.) 75
Heading (degrees) 245 Inclination (degrees) 27 Acceleration (g)
(x-axis) 0.50 Acceleration (g) (y-axis) 1.00 Acceleration (g)
(z-axis) 1.00 Yaw rate (degrees/sec) 11 Distance (cm) 14 Pressure
(pounds/in.sup.2) 50 Image captured (Y/N) Y Audio captured (Y/N)
N
[0388] While Tables 14 and 15A respectively indicate the collection
of environmental information and operational information
separately, and as part of an actuation data set, it should be
appreciated that various embodiments of the present invention are
not limited in this respect. In particular, both environmental
information and operational information may be collected together
as part of a given actuation data set. Furthermore, the inclusion
of one or both of environmental information and operational
information in an electronic record such as the electronic record
1802 need not be limited to one or more particular actuation data
sets; rather, in some exemplary implementations, one or both of
environmental information and operational information may be
included as a unique component of an electronic record apart from
any particular actuation data set (e.g., one or both of
environmental and operational information may be common to, or
"shared by," one or more actuation data sets).
[0389] As mentioned previously, locate transmitters may also
include environmental and/or operational sensors to sense
environmental and/or operating conditions. Such information may be
useful in assessing the general environmental conditions of a
locate operation and the operating conditions of the locate
transmitter, among other things. FIG. 26 illustrates a non-limiting
example of a locate transmitter including environmental and
operational sensors.
[0390] As shown, the data acquisition system 2600 includes a locate
transmitter 2610 and the remote computer 150. The locate
transmitter 2610 includes control electronics 2612, including a
processor 2618, local memory 2622, a communication interface 2624,
a user interface 2626, a timing system 2628, and a location
tracking system 2630. Those components may be substantially the
same as the previously described components of control electronics
112, and therefore are not described in detail now. The control
electronics also includes an activation system 2620, which may
provide a technician with the capability to generate an applied
signal using the locate transmitter 2610. The activation system may
comprise a mechanical and/or electrical mechanism. For example, the
activation system 2620 may be a switch, button, knob, dial, or
other activation device, and may provide the capability for setting
the frequency and amplitude of the applied signal 2632.
Furthermore, the activation system 2620 may be used to prompt the
capture and/or storage of certain locate information generated
and/or received by locate transmitter (e.g., applied signal
frequency, applied signal amplitude, status of the locate
transmitter, environmental and/or operational information, or any
other types of locate information described herein), in a manner
similar to that described above in connection with the actuation
systems of the described locate receivers. Alternatively, the
locate information may be collected and/or stored according to any
of the previously described schemes for locate receivers (e.g.,
continuously, periodically, in response to an event, etc.).
[0391] In response to activating the activation system, the
transmitter circuitry 2631 may generate and transmit the applied
signal 2632. The transmitter circuitry 2631 may be any transmitter
circuitry capable of generating a suitable applied signal.
According to one embodiment, the transmitter circuitry 2631 is
configured to provide an applied signal of variable frequency and
amplitude. For example, the frequency of applied signal 2632 may be
adjustable in increments from about 50 Hz to about 200 kHz, as a
non-limiting example.
[0392] As shown, the locate transmitter 2610 also includes a power
source 2614, which may be substantially the same as previously
described power source 114, and which is therefore not described in
detail now.
[0393] Moreover, the locate transmitter includes the environmental
sensors 1520, operational sensors 1530, and light source 1532.
These components may be positioned at any suitable location(s) of
the locate transmitter, and may operate as previously
described.
[0394] Information collected by the locate transmitter 2610 may be
used to form an event entry and/or an electronic record. For
example, event entries similar to those shown in Tables 12 and 13
may be generated in the context of the locate transmitter 2610.
Similarly, an electronic record similar those of Tables 14 and 15A
may be generated. As a non-limiting example, Table 15B illustrates
an electronic record which may be generated by the locate
transmitter 2610, for example in response to activation of the
activation system 2620.
TABLE-US-00019 TABLE 15B Example record of data acquired by locate
transmitter 2610 upon activation Record Service provider ID 0482 #
act-1 User ID 4815 Transmitter ID 7362 Transmitter Mode Inductive
Timestamp data 12-Jul-2008; 09:35:15.2 Geo-location data 2650.9256,
N, 08003.5234, W Applied signal 115 amplitude (Volts) Applied
signal 60 frequency (Hz) Facility type Gas (yellow) Ground type
Pavement Locate request data Requestor: XYZ Construction Company,
Requested service address: 222 Main St, Orlando, FL Temperature
(.degree. F.) 75 Humidity (%) 31 Illuminance (lux) 15200 Altitude
(meters) 210 Acceleration (g) (x-axis) 0.05 Acceleration (g)
(y-axis) 0.05 Acceleration (g) (z-axis) 0.00 Yaw rate (degrees/sec)
10 Image captured (Y/N) Y Audio captured (Y/N) N
[0395] It should be appreciated that Table 15B illustrates a
non-limiting example of an electronic record that may be generated
in accordance with operation of the locate transmitter 2610, and
that other forms of electronic records including other types of
information may also or alternatively be generated.
[0396] In addition, it should be appreciated that in some
embodiments a locate transmitter and locate receiver may
communicate with each other and/or a remote computer, such as
remote computer 150. For example, in one embodiment each of a
locate transmitter and locate receiver forming a locate set may
communicate directly with a remote computer, for example to provide
the types of information identified in Tables 14, 15A, and 15B.
According to another embodiment, one of the locate receiver and
locate transmitter may send its information (e.g., the information
illustrated in Tables 14, 15A, and 15B) to the other of the two.
The device receiving such information may then send the information
to the remote computer (or other type of remote device). Other
schemes for communication between a locate receiver and locate
transmitter are also possible.
VII. ASSESSING OPERATION AND/OR USE OF A LOCATE DEVICE
[0397] Environmental information and/or operational information, as
well as any of the other constituent components of locate
information and landmark information discussed herein, may be used
to assess whether a locate device (e.g., locate receiver) is being
used and/or a locate operation was or is being performed in
accordance with recommended practices or within recommended
environmental or operational conditions. For simplicity, the
following discussion focuses on locate receivers, although the
concepts described also apply to locate transmitters, such as
previously described locate transmitter 2610.
[0398] As an illustrative example, there may be certain preferred
environmental conditions in which a locate receiver may be used
and/or a locate operation may be performed.
[0399] Additionally, there may be certain preferred process
tolerances with respect to performing locate operations. For
example, there may be a minimum ambient light specification, a
certain angle specification with respect to the locate receiver
relative to a target surface, a certain distance specification
(i.e., distance from target surface), a certain motion
specification with respect to sweeping the locate receiver, and the
like. Violations of these process tolerances may result in poorly
performed locate operations, which may result in poor customer
satisfaction and an increased risk of damage to facilities.
[0400] Other environmental and operational tolerances may also be
applicable to locate operations, and it should be appreciated that
those listed above are non-limiting examples provided for purposes
of illustration.
[0401] In view of the foregoing, according to another aspect of the
present invention, a locate receiver, or a locate operations system
comprising a locate receiver, may include an operations monitoring
application that operates in combination with the locate receiver
or that is installed fully or in part on the locate receiver. In
exemplary implementations discussed below, an operations monitoring
application may provide for detecting and monitoring the use of
locating equipment such as the locate receivers described herein
for out-of-tolerance environmental or operational conditions. For
example, the operations monitoring application of the present
disclosure may provide for detecting and monitoring the use of the
locate receiver within the limits of its product specifications
with respect to, for example, the ambient temperature and humidity.
Additionally or alternatively, monitoring may be based on certain
standard operating procedures (e.g., as established by a facility
owner, a locate contractor, a regulatory body, etc.). Other bases
for monitoring the operation of a locate receiver may also be
used.
[0402] According to one aspect of this embodiment, once an
out-of-tolerance condition is detected, either environmental or
operational, an out-of-tolerance alert or notification may be
provided to the user (technician) of the locate receiver. In some
exemplary implementations, the out-of-tolerance alert may be
generated by the control electronics of the locate receiver,
although not all implementations are limited in this respect.
Additionally or alternatively, a record of such out-of-tolerance
alerts may be stored, such as a record of alert acknowledgments
that may be stored or transmitted by the locate receiver in
response to technician acknowledgement of the alert.
[0403] An example of an operations monitoring application is now
described. For purposes of illustration, the operations monitoring
application is described in connection with locate receiver 1510
discussed above in connection with FIG. 15. However, it should be
appreciated that the operations monitoring application may be used
in connection with other locate receivers described herein, as well
as with locate transmitters (e.g., locate transmitters equipped
with environmental and/or operational sensors).
[0404] Referring to FIG. 19, a functional block diagram of an
example of an operations monitoring application 1900 for detecting
and monitoring the use of a locate receiver (e.g., locate receiver
1510 in this non-limiting example) for out-of-tolerance conditions
is presented. Operations monitoring application 1900 may include an
operations algorithm 1906, which is a software algorithm for
determining whether out-of-tolerance environmental and/or
operational conditions are present during locate operations and/or
whether violations of certain process tolerances occur.
[0405] To make determinations of out-of-tolerance
conditions/occurrences, operations algorithm 1906 may compare
information supplied at an expected data input 1910 to information
supplied at an actual data input 1914. For example, an operating
limits table 1904 may provide the source of information feeding
expected data input 1910. An example of the contents of operating
limits table 1904 is shown in Table 16 below. It should be
appreciated that such a table may include entries for any one or
more conditions sensed by a sensor of the locate receiver, and that
those entries shown are non-limiting examples. Also, operating
limits table 1904 may include information applicable to locate
transmitters in those embodiments in which a locate transmitter is
being used.
TABLE-US-00020 TABLE 16 Example contents of operating limits table
1904 Quantity Value Maximum ambient temperature 100 degrees F.
Minimum ambient temperature 0 degrees F. Maximum surface
temperature 150 degrees F. Minimum surface temperature 40 degrees
F. Maximum ambient humidity 90% Minimum ambient light level 2.0
volts Maximum altitude 2000 meters Minimum angle -30 degrees
Maximum angle 30 degrees Minimum locate distance 1 inch Maximum
locate distance 10 inches Maximum motion rate 1.5 g (e.g., sweeping
rate) Maximum yaw rate 30 degrees/second Maximum pressure 150 psi
Minimum battery strength 15% Difference between actual vs. expected
0.2 miles from location on ticket geo-location Locate receiver
frequency =locate transmitter frequency Minimum received signal
strength 50%
[0406] The contents of operating limits table 1904 may be informed
by standard operating procedures (SOP) information 1902. In this
respect, the contents of operating limits table 1904 may have a
dynamic component. That is, in the event that the content of SOP
information 1902 is modified and/or that the content of SOP
information 1902 varies, for example from one geographic location
to another or from one job/work site to another, the content of
operating limits table 1904 may automatically vary accordingly. SOP
information 1902 may include information, such as, but not limited
to, state, local, and/or regional regulations with respect to
underground facility locate and marking operations; locate service
provider policy information; contractual information; and the like.
Further, SOP information 1902 may include information about the
current industry-accepted best practices and/or procedures with
respect to underground facility locate and marking operations.
[0407] One source of information that may be included in SOP
information 1902 may be, for example, the information of the Best
Practices Version 6.0 document, published in February 2009 by the
Common Ground Alliance (CGA) of Alexandria, Va.
(www.commongroundalliance.com), which document is hereby
incorporated herein by reference in its entirety (this document is
a compilation of current recommended practices designed to prevent
damage to underground facilities). Other sources of information for
SOP information 1902 are also possible.
[0408] Generally, the contents of operating limits table 1904 may
be variable and dynamic based on one or more factors, such as, but
not limited to, dynamic information that may be included in SOP
information 1902, best practices that may vary with time of year,
best practices that may vary with time of day, best practices that
may vary with weather conditions, best practices that may vary with
the skill level of the locate technician, and the like.
[0409] According to one embodiment, the information supplied to
actual data input 1914 is generated and/or collected in real time
during locate operations that are performed in the field. For
example, the source of information feeding actual data input 1914
may be the locate receiver 1510, although locate receiver 1510 is
only a non-limiting example, as any of the locate receivers
described herein may be used. The actual data input 1914 may be fed
with the data from one or more of the sensors 1520 and 1530, which
data is indicated generally in FIG. 19 as sensor data 1916.
[0410] Referring again to Table 16, the values that are contained
in operating limits table 1904 may be expressed in terms that
correspond to the data format that is returned from sensors 1520
and 1530. For example, in one embodiment the light sensor 1608
output may be a voltage, and thus the ambient light level may be
expressed in volts in operating limits table 1904. However, the
values in table 1904 are not limited to being in any particular
format.
[0411] Operations algorithm 1906 may compare the information of
operating limits table 1904 that is present at expected data input
1910 to the information of sensor data 1916 that is present at
actual data input 1914 to determine whether out-of-tolerance
environmental and/or operational conditions and/or violations of
certain process tolerances are present during locate operations. In
one example, operations algorithm 1906 may determine whether locate
operations are being performed when the ambient temperature is too
hot or too cold, or when the ambient humidity is too high. In
another example, operations algorithm 1906 may determine whether
the locate receiver angle or distance detected during locate
operations exceed acceptable parameters. In yet another example,
operations algorithm 1906 may determine whether locate operations
are being performed when it is too dark, based on a comparison of a
sensed light level to a light level specification.
[0412] When out-of-tolerance environmental and/or operational
conditions and/or violations of certain process specifications are
detected, operations algorithm 1906 may generate out-of-tolerance
alerts 1912, the contents of which may reflect the nature of the
out-of-tolerance condition. The alerts may take any suitable form,
such as an audible alert (a chime, a ring tone, a verbal message or
command (e.g., synthesized speech provided by a text-to-speech
synthesizer of the locate receiver), etc., for example presented
via a speaker of the locate receiver), a visual alert (e.g., a text
display presented via display 146 or any other suitable display, an
indicator light, etc.), a tactile alert (e.g., vibration of a
tactile indicator, as described below in connection with FIG. 24),
any combination of those options, or any other suitable type of
notification.
[0413] Any out-of-tolerance alerts 1912 that are generated may be
logged in an alerts log 1908 of operations monitoring application
1900. Further, in those embodiments in which the operations
monitoring application 1900 is not loaded and running on the locate
receiver itself, any out-of-tolerance alerts 1912 that are
generated may be transmitted to the locate receiver 1510, in which
the control electronics 112 may process the out-of-tolerance alerts
1912. For example, control electronics 112 may receive
out-of-tolerance alerts 1912 and present the contents thereof to
the user of locate receiver 1510 (e.g., visually and/or audibly via
the display 146 and/or a speaker, via a tactile indicator,
etc.).
[0414] Additionally, control electronics 112 may generate alert
acknowledgments 1918 that correspond to out-of-tolerance alerts
1912. Alert acknowledgments 1918 may be returned to operations
monitoring application 1900 and logged in alerts log 1908. Alert
acknowledgments 1918 provide evidence that out-of-tolerance alerts
1912 have been received and processed at locate receiver 1510. The
contents of alerts log 1908 may be useful to various business
applications with respect to locate operations. For example, the
contents of alerts log 1908 may be useful to business applications
for assessing the quality of locate operations that are performed
in the field, assessing the skill and/or competency levels of
technicians, and the like. In a specific example, out-of-tolerance
alerts 1912 in alerts log 1908 may be monitored in real time by,
for example, management personnel of locate companies (e.g., locate
contractors, facility owners) regulatory authorities, or other
agencies, wherein certain actions in response to out-of-tolerance
alerts 1912 may be initiated in real time by the management
personnel.
[0415] In one implementation, operations monitoring application
1900 may be installed and executing on a computing device (not
shown) that is separate from locate receiver 1510, but in
communication with the locate receiver 1510, such as remote
computer 150. In another implementation, operations monitoring
application 1900 may be installed (in memory) and executing (via
one or more processors) on a locate receiver itself, such the
locate receiver 1510. In yet another implementation, certain
functionality and/or components of operations monitoring
application 1900 may be installed and executing fully or in part on
the combination of a separate computing device and a locate
receiver (e.g., locate receiver 1510).
[0416] To facilitate operation of a locate receiver (e.g., locate
receiver 1510) with operations monitoring application 1900 of FIG.
19 when the application 1900 is executed partly or entirely on a
separate computing device (e.g., remote computer 150), the locate
receiver may have loaded thereon an operations monitoring client,
which may be a counterpart to operations monitoring application
1900. For example, the operations monitoring client may be executed
by the processor 118 and may process information of operations
monitoring application 1900. Alternatively, the operations
monitoring client may comprise a combination of hardware and
software and/or firmware, which may be coupled to the locate
receiver to communicate with the processor 118. In such an
embodiment, the software and/or firmware may process information of
operations monitoring application 1900. Alternatively, as note
above, the control electronics 112 of the locate receiver may
include fully or in part operations monitoring application 1900
itself. According to one embodiment, the operations monitoring
client is programmed to enable and disable detection electronics
131 of the locate receiver 1510.
[0417] Table 17 shows an example of sensor data 1916 that may be
returned from environmental sensors 1520 and operational sensors
1530. Further, sensor data 1916 may include timestamp information,
for example from the timing system 128.
TABLE-US-00021 TABLE 17 Example sensor data 1916 that may be
returned from locate receiver Quantity Data returned Timestamp
12-Jul-2008; 09:35:15.2 Ambient temperature 73 degrees F. Surface
temperature 78 degrees F. Humidity 31% Illuminance 1500 lux
Altitude 105 meters Heading (from compass) 243 degrees Inclination
-20 degrees Acceleration (x-axis) 0.285 g Yaw rate 12
degrees/second Proximity 15 cm Pressure 65 psi Device health sensor
battery strength 67% Geo-location N35.degree.43.57518,
W078.degree.49.78314 Image captured (Y/N) Y Audio captured (Y/N)
N
[0418] Non-limiting examples of how the data provided by the
environmental sensors 1520 and operational sensors 1530 may be used
by the operations monitoring application 1900 are now given. It
should be appreciated that numerous other conditions may be
detected and acted upon. [0419] i. Readings from ambient
temperature sensor 1602 may be used by operations monitoring
application 1900 to determine whether a locate receiver is being
used while in an out-of-tolerance condition with respect to ambient
temperature. If an out-of-tolerance condition with respect to
ambient temperature is present, an example of the corresponding
out-of-tolerance alert 1912 may be "It is too cold (or too hot) to
be locating. Please acknowledge." [0420] ii. Readings from surface
temperature sensor 1604 may be used by operations monitoring
application 1900 to determine whether a locate receiver is being
used above a surface whose temperature is in an out-of-tolerance
condition. If an out-of-tolerance condition with respect to surface
temperature is present, an example of the corresponding
out-of-tolerance alert 1912 may be "The surface is too cold (or too
hot) to be locating. Please acknowledge." [0421] iii. Readings from
humidity sensor 1606 may be used by operations monitoring
application 1900 to determine whether a locate receiver is being
used in an out-of-tolerance condition with respect to humidity. If
an out-of-tolerance condition with respect to humidity is present,
an example of the corresponding out-of-tolerance alert 1912 may be
"The humidity is too high to be locating. Please acknowledge."
[0422] iv. Readings from light sensor 1608 may be used by
operations monitoring application 1900 to determine whether locate
operations are being performed while in an out-of-tolerance
condition with respect to lighting. If an out-of-tolerance
condition with respect to lighting is present, an example of the
corresponding out-of-tolerance alert 1912 may be "There is
insufficient light to be performing locating operations effectively
and/or safely. Please acknowledge." [0423] v. Readings from
location tracking system 130 may be used by operations monitoring
application 1900 to determine whether locate operations are being
performed in an out-of-tolerance condition with respect to
geo-location (e.g., at the wrong location). If an out-of-tolerance
condition with respect to the geo-location is present, an example
of the corresponding out-of-tolerance alert 1912 may be "It appears
that you are at the wrong location. Please suspend operations and
check the location information on the locate request ticket. Please
acknowledge." [0424] vi. Readings from one or more operational
temperature sensors 1702 may be used by operations monitoring
application 1900 to determine whether a component of the locate
receiver is overheating. An example of the corresponding
out-of-tolerance alert 1912 may be "Warning. The locate receiver is
overheating. Please turn off the device and allow it to cool.
Please acknowledge." [0425] vii. Readings from compass 1704 may be
used by operations monitoring application 1900 to determine whether
the heading of the locate receiver is out-of-tolerance. If an
out-of-tolerance condition with respect to heading is present, an
example of the corresponding out-of-tolerance alert 1912 may be
"You appear to be heading in the wrong direction. Please adjust
course. Please acknowledge." [0426] viii. Readings from
inclinometer 1706 may be used by operations monitoring application
1900 to determine whether the locate receiver is being used in an
out-of-tolerance condition with respect to angle. If an
out-of-tolerance condition with respect to angle is present, an
example of the corresponding out-of-tolerance alert 1912 may be
"The locate receiver angle is too shallow (or too steep). Please
adjust the angle to be about perpendicular to target surface.
Please acknowledge." [0427] ix. Readings from accelerometer 1708
may be used by operations monitoring application 1900 to determine
whether the locate receiver is being used in an out-of-tolerance
condition with respect to the rate of movement and/or motion of the
locate receiver during the locate operation. If an out-of-tolerance
condition with respect to the motion is present, an example of the
corresponding out-of-tolerance alert 1912 may be "You are sweeping
the locate receiver too rapidly to pick up a signal reliably.
Please slow down the sweeping motion. Please acknowledge." [0428]
x. Readings from yaw rate sensor 1710 may be used by operations
monitoring application 1900 to determine whether the locate
receiver is being used in an out-of-tolerance condition with
respect to yaw rate. If an out-of-tolerance condition with respect
to yaw rate of the locate receiver is present, an example of the
corresponding out-of-tolerance alert 1912 may be "You are twisting
the locate receiver too quickly. Please acknowledge." [0429] xi.
Readings from proximity sensor 1712 may be used by operations
monitoring application 1900 to determine whether the locate
receiver is being used in an out-of-tolerance condition with
respect to the distance from the surface under which a facility is
located. If an out-of-tolerance condition with respect to distance
is present, an example of the corresponding out-of-tolerance alert
1912 may be "The tip of the locate receiver is too close (or too
far) from the target surface. Please adjust to between 3 and 6
inches from surface. Please acknowledge." [0430] xii. Readings from
the pressure sensor 1714 may be used by operations monitoring
application 1900 to determine whether the actuation system of the
locate receiver is being properly actuated. In an out-of-tolerance
condition with respect to pressure is present, an example of the
corresponding out-of-tolerance alert 1912 may be "You are not
pressing the trigger firmly enough. Please acknowledge." [0431]
xiii. In one embodiment the device health sensor 1716 may monitor a
battery level of the locate receiver. If an out-of-tolerance
condition with respect to the battery level is detected by
operations monitoring application 1900, an example of the
corresponding out-of-tolerance alert 1912 may be "The battery of
the locate receiver is too weak to perform locate operations
reliably. Please replace or recharge the battery as soon as
possible. Please acknowledge." [0432] xiv. Readings from the
detection electronics 131 may be used by operations monitoring
application 1900 to determine whether the locate receiver is being
used in an out-of-tolerance condition with respect to the
frequency. If an out-of-tolerance condition with respect to the
frequency is present, an example of the corresponding
out-of-tolerance alert 1912 may be "The frequency settings of the
locate receiver and locate transmitter do not match. Please check
the frequency settings of your locating equipment. Please
acknowledge." [0433] xv. Signal strength readings from the
detection electronics 131 may be used by operations monitoring
application 1900 to determine whether the locate receiver is being
used in an out-of-tolerance condition with respect to signal
strength. If an out-of-tolerance condition with respect to signal
strength is present, an example of the corresponding
out-of-tolerance alert 1912 may be "The signal strength of the
locate receiver is too weak to be reliable. Please adjust the gain
and/or frequency settings of your locating equipment in an attempt
to detect a more reliable signal. Please acknowledge."
[0434] Other conditions and events that may arise with the
operations monitoring application 1900 and which may trigger an
alert or notification to the technician include, but are not
limited to, the following: [0435] (a) User Input Errors--Action
taken by the user, or suggested by usage pattern is invalid for the
current device configuration; [0436] (b) System Malfunction
Errors--locate receiver encountered a problem while processing
valid data, and was unsuccessful in automatically correcting this
problem; [0437] (c) Storage Errors--Standard data cache of the
locate receiver or extended storage experiences some error in
storing the current data, such as insufficient storage space or
some other storage error; [0438] (d) Power Errors--locate receiver
has either exhausted the battery supply (e.g., power source 114),
or an unrecoverable battery/power error was encountered; [0439] (e)
Network Errors--The network component (e.g., communication
interface 124) has experienced an unrecoverable error; [0440] (f)
Geographic Location Errors--The GPS component (e.g., location
tracking system 130) has experienced an unrecoverable error; [0441]
(g) Actuator Errors--The actuator component (e.g., actuation system
120) has experienced an unrecoverable error; [0442] (h)
Synchronization Errors--locate receiver encountered a problem while
synchronizing with the host server (e.g., computer 150) and was
unsuccessful in automatically correcting this problem; [0443] (i)
Data Accessibility Errors--The requested data cannot be retrieved
due to data corruption, cache locking, or missing medium; [0444]
(j) User Input Required--Operator response is required prior to
continuing; [0445] (k) Network Connectivity--The network component
(e.g., communication interface 124) has detected a change in
coverage (coverage loss, overage gain, etc); [0446] (l) Geographic
Position Accuracy--The GPS component (e.g., location tracking
system 130) has detected a change in overall accuracy (gain or loss
of satellite, WAAS support, etc).
[0447] In the examples above, alert acknowledgments 1918 in
response to out-of-tolerance alerts 1912 may take various forms. In
one example, the technician may acknowledge using the user
interface 126, for example by pushing a button, flipping a switch,
or selecting a menu option, depending on the type of user
interface. Different user inputs (buttons, toggles, menu
selections, etc.) may have different meanings with respect to
providing alert acknowledgments 1918. Table 18 below shows an
example of alert acknowledgments 1918, wherein, as a non-limiting
example, certain keys of a user interface of the locate receiver
have certain meanings.
TABLE-US-00022 TABLE 18 Example alert acknowledgments 1918 Key
Meaning # Indicates an acknowledgement that the alert is received *
Indicates an acknowledgement that the alert is received and that
corrective action is being or has been taken @ Indicates an
acknowledgement that the alert is received and that locate
operations are continuing regardless $ Indicates an acknowledgement
that the alert is received and that locate operations are
(temporarily) suspended
[0448] In another example, a dropdown menu and/or a set of icons
that include the various types of alert acknowledgments 1918, such
as shown in Table 18, may be presented on the display of the locate
receiver. The user may then select the desired type of alert
acknowledgment 1918 from the dropdown menu and/or icons.
[0449] Also, as mentioned above, out-of-tolerance conditions and
other conditions detected by the environmental and/or operational
sensors may be logged, for example into alerts log 1908,
irrespective of whether an alert is provided to the technician.
Thus, for any of the above-described examples in which an alert may
be generated, a log of the detected condition may also or
alternatively be made. Also, other conditions than those described
above may be logged.
[0450] FIG. 20 is a functional block diagram of an example of a
locate operations system 2000 that includes operations monitoring
application 1900 of FIG. 19 and the locate receiver 1510 of FIG.
15. Again, other locate receivers or locate transmitters as
described herein may be used, and locate receiver 1510 is described
only for purposes of illustration. Locate operations system 2000
may include a central server 2010, which is maintained and operated
by, for example, a locate company, a facilities owner, a regulatory
authority, or other agency (not shown). Central server 2010 may be
any local or centralized computing device that is capable of
hosting and facilitating execution of one or more applications. In
implementation, central server 2010 may be a networked application
server and/or web server that is connected to a network 2012.
Examples of personnel that may be associated with central server
2010 include locate technicians 2014.
[0451] Residing on central server 2010 may be business applications
2016, which may be any business applications that may be useful
with respect to locate operations. In one example, business
applications 2016 may include a locate operations scoring
application 2018 that processes information about locate operations
and generates locate operations scores 2020 that may indicate the
degree of quality of individual locate operations. Additionally,
SOP information 1902 may reside at central server 2010 and may be
accessed by operations monitoring application 1900 and/or any
entity of locate operations system 2000 via network 2012.
[0452] For example, locate operations scoring application 2018 may
be based on various embodiments of a quality assessment
application, as well as any one or more of the scoring criteria
and/or exemplary metrics disclosed in connection with such quality
assessment applications, as set forth in U.S. Non-provisional
application Ser. No. 12/493,109, filed Jun. 26, 2009, entitled
"METHODS AND APPARATUS FOR QUALITY ASSESSMENT OF A FIELD SERVICE
OPERATION," and published as U.S. Patent Publication
2009-0327024-A1, which application is incorporated by reference
herein. In particular, a quality assessment application may be
configured to receive a variety of information germane to locate
and marking operations, and compare such information to expected
values or benchmarks (metrics) based on various criteria. A scoring
algorithm implemented as part of some implementations of a quality
assessment application may compare various input information (e.g.,
"field information," as obtained from one or more pieces of
locating equipment such as a locate receiver) to the expected
values or benchmarks to generate a quality assessment score in an
automated fashion.
[0453] In another example, business applications 2016 may include a
ticket approval application 2022 that processes information about
locate and marking operations and generates ticket approval
outcomes 2024 that again may indicate the degree of quality of
individual locate and marking operations. For example, ticket
approval application 2022 may be based on the ticket approval
system that is described in U.S. Non-provisional application Ser.
No. 12/204,454, filed Sep. 4, 2008, entitled "TICKET APPROVAL
SYSTEM FOR AND METHOD OF PERFORMING QUALITY CONTROL IN FIELD
SERVICE APPLICATIONS," and published as U.S. Patent Publication
2009-0204466-A1, which application is hereby incorporated herein by
reference. This application describes a ticket approval system for
and method of performing quality control (QC) in field service
applications. The ticket approval system may include a work
management server. The work management server may include a ticket
approval software application and a database for storing digital
ticket information, such as field service site identification
information, manifest information, and digital images of field
service activities. A method of performing QC may include, but is
not limited to, the field technician completing the ticket and
providing data/images, an approver viewing and selecting a certain
field technician and ticket for quality control review, the
approver reviewing data/images of the selected ticket, the approver
approving the ticket, the approver tagging the ticket for QC, a QC
approver processing QC referrals, the QC approver routing the
ticket to a QC technician, the QC technician completing the QC
tasks and updating the data/images of the selected ticket, the
approver tagging the ticket for coaching, the approver processing
coaching referrals, and the approver performing coaching tasks.
[0454] Network 2012 may be, for example, any local area network
(LAN) and/or wide area network (WAN) for connecting to the
Internet. In one non-limiting embodiment, network 2012 provides the
communication link between any and/or all entities of locate
operations system 2000. For example, network 2012 provides the
communication network by which information may be exchanged between
central server 2010, one or more onsite computers 2030, and/or
locating equipment (e.g., locate receiver 1510) that are used by
locate technicians 2014 in the field.
[0455] Onsite computers 2030 may be any computing devices that are
capable of processing and executing program instructions. Onsite
computers 2030 may be used by locate technicians 2014 that are
performing locate and marking operations in the field. For example,
each onsite computer 2030 may be a portable computer, a personal
computer, a tablet device, a personal digital assistant (PDA), a
cellular radiotelephone, a mobile computing device, a touch-screen
device, a touchpad device, or generally any device including, or
connected to, a processor and a user interface. Preferably, each
onsite computer 2030 is a portable computing device, such as laptop
computer or tablet device. Onsite computers 2030 may be used by
locate technicians 2014 to process locate request tickets (not
shown) and to perform locate and marking operations
accordingly.
[0456] Additionally, operations monitoring application 1900 may be
installed on onsite computers 2030. For example, operations
monitoring application 1900 may be used to process information
received from or transmitted to locate receiver 1510. Each onsite
computer 2030 may include a processing unit 2032, which may be any
standard controller or microprocessor device that is capable of
executing program instructions, such as those from operations
monitoring application 1900. Each onsite computer 2030 may also
include a quantity of memory 2034, which may be any data storage
mechanism for storing any information that is processed locally at
onsite computer 2030. Processing unit 2032 and memory 2034 may be
used for managing the overall operations of onsite computer
2030.
[0457] Further, each onsite computer 2030 may include a
communication interface 2038 for connecting to network 2012 and/or
for communication with locating equipment. For example,
communication interface 2038 may be any wired and/or wireless
communication interface by which information may be exchanged
between any entities of locate operations system 2000.
[0458] Operations monitoring application 1900 is used in locate
operations system 2000 for detecting and monitoring the use of
locating equipment (e.g., locate receiver 1510) in out-of-tolerance
conditions, as described above. For example, operations algorithm
1906 of operations monitoring application 1900 determines whether
out-of-tolerance environmental and/or operational conditions are
present during locate operations and/or whether violations of
certain process tolerances are present during locate operations.
Optionally, operations monitoring application 1900 may be used to
automatically enable and disable (either electrically,
mechanically, or both) locating equipment in the field based on
certain out-of-tolerance conditions being present.
[0459] Further, locate operations system 2000 is not limited to the
types and numbers of entities that are shown in FIG. 20. Any types
and numbers of entities that may be useful in underground
facilities locate applications may be included in locate operations
system 2000. More details of a method of detecting and monitoring
the use of locating equipment for out-of-tolerance conditions by
use of locate operations system 2000 are described with reference
to FIG. 21.
[0460] FIG. 21 illustrates a flow diagram of an example of a method
2100 of detecting and monitoring the use of locating equipment,
such as the various locate receivers and transmitters described
herein, for out-of-tolerance conditions utilizing, for example,
locate operations system 2000 of FIG. 20. As noted above, the
method may be implemented on any suitable combination of hardware,
such as those items shown in FIG. 20, or entirely on the locate
receiver itself. Method 2100 may include, but is not limited to,
the following steps, which may be implemented in any order.
[0461] At step 2110, onsite computer 2030 or the locate receiver
itself may detect powering up (e.g., a power on state), and/or one
more specific events (e.g., docking/de-docking of a locate
receiver, one or more actuations, error conditions, technician
interaction with a user interface, etc.) associated with a locate
receiver, such as locate receiver 1510. Additionally, the relevant
SOP information is acquired. For example, using location tracking
system 130 of locate receiver 1510, the geo-location of the
job/work site may be determined. Based on this geo-location
information, operations monitoring application 1900 automatically
queries SOP information 1902 at central server 2010 for the SOP
information of the regulatory body that corresponds to the location
of the work site, which is used to inform operating limits table
1904 of operations monitoring application 1900.
[0462] Subsequently, operations monitoring application 1900 at
onsite computer 2030 may begin monitoring the environmental and/or
operating conditions associated with use of the locate receiver.
For example, operations algorithm 1906 of operations monitoring
application 1900 begins monitoring sensor data 1916 that is
returned from locate receiver 1510 and compares the contents of
sensor data 1916 to information in operating limits table 1904.
[0463] At decision step 2112, operations algorithm 1906 of
operations monitoring application 1900 determines whether any
out-of-tolerance conditions are present. For example, if any one of
the following out-of-tolerance conditions is present, method 2100
may proceed to step 2116. However, if none of the following
out-of-tolerance conditions are present, method 2100 may proceed to
step 2114. The following out-of-tolerance conditions are exemplary
only and not meant to be limiting. [0464] 1. Readings from ambient
temperature sensor 1602 may indicate an out-of-tolerance condition
with respect to ambient temperature when compared against, for
example, the maximum ambient temperature and/or minimum ambient
temperature specifications of operating limits table 1904 (see, for
example, Table 16). [0465] 2. Readings from surface temperature
sensor 1604 may indicate an out-of-tolerance condition with respect
to surface temperature when compared against, for example, the
maximum surface temperature and/or minimum surface temperature
specifications of operating limits table 1904 (see, for example,
Table 16). [0466] 3. Readings from humidity sensor 1606 may
indicate an out-of-tolerance condition with respect to humidity
when compared against, for example, the maximum ambient humidity
specification of operating limits table 1904 (see, for example,
Table 16). [0467] 4. Readings from light sensor 1608 may indicate
an out-of-tolerance condition with respect to lighting when
compared against, for example, the minimum ambient light level
specification of operating limits table 1904 (see, for example,
Table 16). [0468] 5. Readings from compass 1704 may indicate an
out-of-tolerance condition with respect to heading when compared
against, for example, an expected value. [0469] 6. Readings from
inclinometer 1706 may indicate an out-of-tolerance condition with
respect to locate receiver angle when compared against, for
example, the minimum angle and/or maximum angle specifications of
operating limits table 1904 (see, for example, Table 16). [0470] 7.
Readings from accelerometer 1708 may indicate an out-of-tolerance
condition with respect to the rate of movement and/or motion of the
locate receiver when compared against, for example, the maximum
motion rate specification of operating limits table 1904 (see, for
example, Table 16). [0471] 8. Readings from yaw rate sensor 1710
may indicate an out-of-tolerance condition with respect to yaw rate
when compared against, for example, the maximum yaw rate
specification of operating limits table 1904 (see, for example,
Table 16). [0472] 9. Readings from proximity sensor 1712 may
indicate an out-of-tolerance condition with respect to locate
receiver distance from a target surface when compared against, for
example, the minimum distance and/or maximum distance
specifications of operating limits table 1904 (see, for example,
Table 16). [0473] 10. Readings from pressure sensor 1714 may
indicate an out-of-tolerance condition with respect to the pressure
exerted on an actuation system of the locate receiver when compared
against, for example, the maximum pressure specifications of
operating limits table 1904 (see, for example, Table 16). [0474]
11. Information from the device health sensor 1716 that is
monitoring the battery of the locate receiver may indicate an
out-of-tolerance condition with respect to battery strength when
compared against, for example, the minimum battery strength
specification of operating limits table 1904 (see, for example,
Table 16). [0475] 12. Information from the detection electronics
131 may indicate an out-of-tolerance condition with respect to
frequency, for example when compared against the locate receiver
frequency specification of operating limits table 1904 (see, for
example, table 16). [0476] 13. Information from the detection
electronics 131 may provide signal strength readings which may
indicate an out-of-tolerance condition with respect to signal
strength when compared to, for example, the signal strength
specifications of operating limits table 1904 (see, for example,
table 16).
[0477] At step 2114, operations monitoring application 1900
continues to monitor the conditions (e.g., environmental and/or
operating) of the locate receiver during locate operations. For
example, operations monitoring application 1900 at onsite computer
2030 continues to monitor the conditions of the locate receiver
1510 during locate operations by comparing the contents of sensor
data 1916 to information in operating limits table 1904. At the
conclusion of this step, method 2100 may, for example, return to
step 2112.
[0478] At step 2116, operations monitoring application 1900
generates the corresponding out-of-tolerance alert 1912, logs the
out-of-tolerance alert 1912 in alerts log 1908, and transmits the
out-of-tolerance alert 1912 to the locating equipment, such as to
locate receiver 1510, in those embodiments in which the method is
not entirely implemented on the locate receiver itself. By way of
example, the following out-of-tolerance alerts 1912 correspond
respectively to the example out-of-tolerance conditions of step
2112. The following out-of-tolerance alerts 1912 are exemplary only
and not meant to be limiting. Also, the below-indicated alerts with
respect to surface temperature and humidity may be applicable to
scenarios in which a locate technician is both locating and marking
a facility. [0479] 1. "It is too cold (or too hot) to be locating.
Please acknowledge." [0480] 2. "The surface temperature is too cold
(or too hot) to dispense marking material. Please acknowledge."
[0481] 3. "The humidity it too high to be locating and/or
dispensing marking material. Please acknowledge." [0482] 4. "There
is insufficient light to be performing locate operations
effectively and/or safely. Please acknowledge." [0483] 5. "You
appear to be heading in the wrong direction. Please acknowledge."
[0484] 6. "Receiver angle is too shallow (or too steep). Please
adjust the angle to be about perpendicular to target surface.
Please acknowledge." [0485] 7. "Locating (sweeping) motion is too
rapid or too erratic to pick up a signal reliably. Please slow down
or smooth out the motion. Please acknowledge." [0486] 8. "Locate
receiver is being twisted too quickly. Please acknowledge." [0487]
9. "The tip of the locate receiver is too close (or too far) from
the target surface. Please adjust to between 3 and 6 inches from
surface. Please acknowledge." [0488] 10. "You are applying too much
pressure to the actuator. Please acknowledge." [0489] 11. "The
battery of the locate receiver is too weak to perform locate
operations reliably. Please replace or recharge the battery as soon
as possible. Please acknowledge." [0490] 12. "The frequency
settings of the locate receiver and the locate transmitter do not
match. Please check the frequency settings of your locating
equipment. Please acknowledge." [0491] 13. "The signal strength of
the locate receiver is too weak to be reliable. Please adjust the
gain and/or frequency settings of your locating equipment in an
attempt to detect a more reliable signal. Please acknowledge."
[0492] At step 2118, one or more out-of-tolerance alerts 1912 are
received at the locating equipment, such as locate receiver 1510,
in those embodiments in which alerts are not generated on the
locate receiver itself. The out-of-tolerance alerts 1912 may be
presented to the user in, for example, text form via a display of
the locate receiver, audible form (e.g., synthesized speech
provided by a text-to-speech synthesizer of the locate receiver)
via a speaker of the locate receiver, or in any other suitable
manner.
[0493] At step 2120, a certain alert acknowledgment 1918 may be
returned to operations monitoring application 1900. For example,
the user, such as a certain locate technician 2014 may press a
certain key of the user interface of the locate receiver and
initiate the desired alert acknowledgment 1918, such as those shown
above in Table 18. Once the alert acknowledgment 1918 is received
at operations monitoring application 1900, it may be associated
with its originating out-of-tolerance alert 1912 and logged in
alerts log 1908. Subsequently, operations monitoring application
1900 continues to monitor the conditions of the locating equipment,
such as locate receiver 1510. At the conclusion of this step,
method 2100 may, for example, return to step 2112 and may
optionally proceed to step 2122.
[0494] Optionally, method 2100 may include steps to disable
locating equipment (e.g., by disabling the actuation system, the
detection electronics, or any other component of the locating
equipment) until or unless a certain out-of-tolerance condition is
corrected. For example, method 2100 may optionally include the
following steps.
[0495] At optional decision step 2122, certain out-of-tolerance
conditions may carry such importance that the suspension of locate
operations is mandated (e.g., disable actuations so as to impede
the technician from continuing). One such out-of-tolerance
condition may be the out-of-tolerance condition with respect to
temperature. Another such out-of-tolerance condition may be the
out-of-tolerance condition with respect to humidity. Yet another
such out-of-tolerance condition may be the out-of-tolerance
condition with respect to lighting. Still another such
out-of-tolerance condition may be the out-of-tolerance condition
with respect to acceleration or velocity. Other out-of-tolerance
conditions may also be sufficiently important to mandate suspending
locate operations, and those examples listed are non-limiting. In
these examples, operations monitoring application 1900 may wait a
certain amount of time (e.g., 1 minute) from the initial detection
of the out-of-tolerance conditions and again acquire sensor data
1916 to determine whether the out-of-tolerance condition is still
present or has been corrected. If the out-of-tolerance condition
has been corrected, method 2100 may proceed to step 2124. However,
if the out-of-tolerance condition has not been corrected, method
2100 may proceed to step 2126.
[0496] At optional step 2124, the locate technician 2014 continues
to perform locate operations and operations monitoring application
1900 continues to monitor the conditions of the locate receiver. At
the conclusion of this step, method 2100 may, for example, return
to step 2112.
[0497] At optional step 2126, the locate receiver may be disabled.
For example, actuation system 120 of locate receiver 1510 may be
disabled to impede user acuations and/or detection electronics 131
may be disabled. The action to disable may be logged in alerts log
1908.
[0498] At any time during the steps of method 2100, the contents of
alerts log 1908 may be processed by business applications 2016. In
one example, alerts log 1908 may be processed by locate operations
scoring application 2018 and/or ticket approval application 2022
for assessing the quality of locate and marking operations that are
performed in the field, assessing the skill and/or competency
levels of locate technicians, and the like.
[0499] While FIGS. 19-21 illustrate some non-limiting examples of
manners in which data provided by environmental sensors and/or
operational sensors of a locate receiver may be used, other uses
are also possible. For example, the data from environmental sensors
1520 and/or operational sensors 1530 may be used to trigger alerts
or notifications to a technician irrespective of whether the sensed
condition is outside tolerances. For example, in some instances
there may not be a specific tolerance for a given environmental or
operational condition, and yet an alert to the technician may be
generated for the purpose of making the technician aware of
whatever value the sensed condition has taken. Thus, the generation
of alerts/notifications/warnings based on sensed environmental and
operational conditions is not limited to those instances in which
the sensed condition takes any particular value(s). Furthermore,
alerts may be generated based on conditions relating to dispensing
of a marking material, which may be applicable to scenarios in
which a technician is both locating and marking a facility. For
example, sensed conditions with respect to ambient temperature,
surface temperature, and/or humidity, among others, may impact
dispensing of a marking material, and thus alerts/notifications may
be presented to the technician to indicate whether conditions are
appropriate for or adverse to dispensing of a marking material.
Also, as previously explained, the alert/notification signal(s)
described herein may take any suitable form(s), such as an audible
alert (a chime, a ring tone, a verbal message or command (e.g.,
synthesized speech provided by a text-to-speech synthesizer of the
locate receiver), etc.), a visual alert (e.g., a text display (for
example, in those embodiments in which the locate receiver includes
a display), an indicator light, etc.), a tactile indication, any
combination of those options, or any other suitable type of
notification.
[0500] Also, it should be appreciated that information from one or
more of the environmental sensors 1520 and/or operational sensors
1530 may be used more generally to control or alter operation of
the locate receiver. For example, one or more components of the
locate receiver 1510 may be activated, enabled, or disabled, or the
functionality thereof controlled or altered in some manner, in
response to one or more of the environmental sensors 1520 and/or
operational sensors 1530 providing environmental information and/or
operational information indicative that such control should be
exhibited. Such activation, enablement, and/or disablement may be
electrical in nature (e.g., providing power or an enable signal,
triggering operation of a sensor, etc.), mechanical in nature
(e.g., causing a locking mechanism to be engaged on the actuation
system) or both. For example, if the sensed inclination of the
locate receiver as sensed by inclinometer 1706 is unsuitable for
locating, the actuation system 120 and/or detection electronics 131
may be disabled. Similarly, if the acceleration as sensed by
accelerometer 1708 is out-of-tolerance with accepted practices, the
actuation system 120 and/or detection electronics 131 may be
disabled. If a sensed condition is out-of-tolerance, the operation
of one of the environmental and/or operational sensors may be
altered, for example by altering the sampling rate to collect more
or less data. According to one embodiment, the sampling rate of a
location tracking system of the locate receiver may be increased in
response to an out-of-tolerance heading detected by the compass of
the locate receiver. According to another embodiment, the sampling
rate of the location tracking system may be increased in response
to the location tracking system detecting an out-of-tolerance
location. Other control actions are also possible, and the aspects
described herein relating to controlling the locate receiver in
response to sensing environmental and/or operational conditions are
not limited in the types of actions that may be taken or the sensed
conditions which may trigger action/alteration.
[0501] Furthermore, the determination of whether a condition or
multiple conditions are out-of-tolerance, whether to generate an
alert or notification to a technician, or whether to control/alter
some functionality of the locate receiver based at least in part on
environmental and/or operational information, may be made in any
suitable manner. For instance, as illustrated in some of the
foregoing examples, such a determination may be made by comparison
of a single value from a sensor to an expected or target value.
Alternatively, outputs from the environmental sensors and/or
operational sensors may be monitored for changes (e.g., any change,
or by some predetermined amount), rather than for a particular
single value. For example, a change in temperature, or a change in
light, may initiate generation of an alert, rather than a single
temperature or light value.
[0502] In addition, information provided by one or more of the
environmental sensors and/or operational sensors may be monitored
and analyzed to detect patterns. For example, information provided
by the operational sensors may be used to formulate and assess
patterns of operation of a particular technician, which may be
thought of as technician "signatures." As an example, a particular
technician may have a characteristic motion when performing a
locate operation, such as when sweeping over a buried facility, or
may perform the operation at a characteristic speed. Assessing
information provided by the one or more accelerometers 1708, for
example, may allow for determination of the unique characteristic.
Once determined, information from the operational sensors on future
jobs may allow for identification of the technician based on the
unique characteristic, and may also be used to assess whether the
technician is operating in his/her normal manner or whether he/she
is deviating from his/her usual operation, which may suggest that
the technician was doing something out of the ordinary, and which
accordingly may cause generation of an alert/notification and/or
alteration of the locate receiver. Such information, therefore, may
be used for quality control and/or for training purposes of
technicians. Similarly, such operating information from multiple
technicians may be used to develop standard operating guidelines or
protocols.
[0503] It should be appreciated from the foregoing discussion that
information provided by two or more of the environmental sensors
may be used in combination, for example to assess the environmental
conditions, to interact with the technician (e.g., generate an
alert), and/or to control/alter operation of the locate receiver
(e.g., disable or enable actuation of the locate receiver). As a
non-limiting example, the sensed ambient temperature in combination
with the sensed humidity may provide information about whether a
particular form of precipitation is present (e.g., snow, rain,
etc.), in response to which an alert may be generated and/or one or
more components of the locate receiver may be enabled or disabled
(e.g., the actuation system may be disabled). Non-limiting examples
of useful combinations of environmentally sensed conditions
include: ambient temperature+humidity; surface
temperature+humidity; ambient temperature+surface temperature;
ambient temperature+light sensor; light+image capture; light+audio
capture; and ambient temperature+humidity+light. However, it should
be appreciated that other combinations are also possible.
[0504] It should also be appreciated from the foregoing discussion
that information provided by two or more of the operational sensors
may be used in combination, for example to assess the operational
conditions of a locate receiver, to interact with the technician,
to assess, determine and/or analyze technician "signatures"
associated with device use/manipulation, and/or to control or alter
operation of the locate receiver (e.g., to disable actuation of the
locate receiver, enable actuation of the locate receiver, etc.).
Non-limiting examples of useful combinations of sensed operational
conditions which may be used for any of the purposes described
above include: acceleration of locate receiver+proximity of locate
receiver to surface; proximity of locate receiver to
surface+inclination of locate receiver; acceleration+heading;
geo-location+heading+acceleration; and
geo-location+acceleration+inclination. However, it should be
appreciated that other combinations are also possible.
[0505] Furthermore, according to one embodiment, information
provided by one or more environmental sensors may be used in
combination with information provided by one or more operational
sensors, for example to assess the quality of the locate operation,
to interact with the technician, to assess, determine and/or
analyze technician "signatures" associated with device
use/manipulation, and/or to control or alter operation of the
locate receiver (e.g., disable or enable actuation of the locate
receiver). For example, information about ambient light level
sensed by a light sensor may be used in combination with
acceleration data from an accelerometer, as, for example, it may be
preferable in some embodiments for a technician to move more slowly
in low light conditions. Other combinations of sensor information
may also be useful depending on a particular application.
VIII. GROUP MODE AND SOLO MODE
[0506] As previously explained, the locate receivers described
herein may be used in different modes, examples of which include
locate mode and landmark mode. In addition, locate receivers
according to one aspect of the present invention may be operated in
a so-called "solo mode" or a so-called "group mode."
[0507] For some locate operations, a single technician may be
present at the jobsite and may complete the locate operation. Thus,
any locate data collected relating to the job may be solely from
the technician's locate receiver and may not need to be combined
with locate data from any other locate receivers. In such
situations, the locate receiver may be operated as an individual,
independent locate receiver in solo mode. As described above, data
collected by the locate receiver may be stored locally and/or
transmitted to a host server, such as remote computer 150.
[0508] For certain types of underground facility locate operations,
multiple locate technicians may be working on a same locate ticket
simultaneously. When this occurs, it may be advantageous for some
or all of the locate receivers that are used during performance of
the ticketed job to consolidate data, such as by providing data to
a host server. This may be accomplished through the use of a group
mode of operation of the locate receivers. In group mode, a locate
receiver may act as a "worker" device, and may not be capable of
transmitting its collected locate data to a remote computer. For
example, the wireless transmission capability of the locate
receiver may be disabled in group mode. Rather, the locate data may
be cached in local memory 122 of the locate receiver, or may be
transmitted to another locate receiver, which may act as a "leader"
device, receiving the collected locate data from the other locate
receivers used for the locate operation. The leader locate receiver
may then transmit the collected locate information to a remote
computer, or may handle the collected information in any suitable
manner.
[0509] Selection of solo mode and group mode may be accomplished in
any suitable manner. For example, selection between these two modes
may be facilitated by any suitable combination of hardware and/or
software on the locate receiver. For example, the locate receiver
may include mode controller software for selecting the operating
mode of the locate receiver. According to one embodiment, the user
interface of the locate receiver may include a toggle switch for
toggling between solo mode and group mode. Alternatively, the
locate receiver may present the technician with a menu on a
graphical display of user interface 122, from which the technician
may choose the desired mode. Other schemes for allowing selection
of solo mode and group mode are also possible.
IX. ENHANCEMENTS TO DETERMINATION OF LOCATION OF LOCATE
RECEIVER
[0510] According to some embodiments, it may be desirable to know
the location of the tip of the locate receiver, as for example, the
tip may be the portion of the locate receiver located in close
proximity to the ground when a locate technician sweeps the locate
receiver over the ground to detect a buried facility. Thus, for
example, determining the motion of the tip of the locate receiver
may allow for assessment of technician manipulation of the locate
receiver, which may be used for quality control, training purposes,
and standard setting, among other things. Thus, according to
another aspect of the present invention, methods and apparatus are
provided for determining the location of the tip of a locate
receiver. However, it should be appreciated that the tip of the
locate receiver is a non-limiting example of a specific point of
interest of a locate receiver for which it may be desirable to know
the location, as, for example, other portions of the locate
receiver may be of interest in other embodiments. The methods and
apparatus described herein may be applied equally well to the
determination of any point of interest on the locate receiver.
[0511] One approach for determining the location of the tip of the
locate receiver (e.g., tip 148 shown in FIG. 5), or any other point
of interest on the locate receiver, is to place a location tracking
system at that point. Thus, according to one embodiment, a locate
receiver, such as any of the locate receivers described previously
herein, or any other locate receiver, may include a location
tracking system 130 as discussed in other embodiments (e.g., a GPS
receiver), wherein the location tracking system is disposed at or
sufficiently near the tip of the locate receiver, allowing for
determination of the location of the tip of the locate receiver.
Thus, the location tracking system 130 may provide the geo-location
of the tip of the locate receiver, which, as mentioned, may be
useful for a variety of reasons. For example, the geo-location
information provided by the location tracking system may be used to
record the motion of the tip of the locate receiver, which may be
used for detection of out-of-tolerance operation of the locate
receiver, determination of operating patterns of technicians, or
for various other purposes.
[0512] While the above-described embodiment provides a location
tracking system positioned at the point of interest on the locate
receiver, such positioning of a location tracking system may not
always be possible or advantageous. For example, as explained
previously herein, in some embodiments the operation of the
location tracking system may be facilitated by positioning the
location tracking system toward the top of the locate receiver, for
example if the location tracking system is a GPS receiver. However,
as mentioned, it may be desirable in some embodiments to determine
the location of the tip of the locate receiver, or any other point
of interest of the locate receiver, which in some situations will
not correspond to the top of the locate receiver. Thus, according
to one embodiment, methods and apparatus are provided for
determining the location of a point of interest of a locate
receiver when a location tracking system is located at a different
point on the locate receiver. For simplicity of explanation, the
following examples will be discussed assuming that a location
tracking system is located near the top of the locate receiver and
that the point of interest of the locate receiver is the tip of the
locate receiver. It should be appreciated that the described
apparatus and techniques may apply equally well to other positions
of the location tracking system and points of interest on the
locate receiver.
[0513] To facilitate the following discussion, it is useful to
first consider the physical configuration at issue for determining
the location of the tip of the locate receiver when the location
tracking system is located at or near the top of the locate
receiver. For this purpose, the locate receiver may be represented
in simplified form as an elongated rod or stick. FIG. 22
illustrates a perspective view of such a simplified representation
of a locate receiver, shown as locate receiver 2200.
[0514] In FIG. 22, the x-y plane represents the ground and the
z-direction represents the vertical direction perpendicular to the
ground. The point P1 may be the location of a location tracking
system (e.g., a GPS receiver), and in some embodiments may
correspond generally to the top of the locate receiver, for example
near where the technician may hold the locate receiver if it is a
handheld device. The point P2 represents the point of interest of
the locate receiver, and in this non-limiting example corresponds
generally to the tip of the locate receiver. The point P2 may be
assumed to be at ground level, i.e., in the x-y plane (z=0) for
purposes of simplicity, except as described below in those
embodiments in which the distance of P2 from the x-y plane may be
measured. The shortest distance between P1 and P2 is given by L,
which in some embodiments may correspond to the length of the
locate receiver, although not all embodiments are limited in this
respect. For example, if the locate receiver has a non-linear
shape, the distance L may not correspond to the length of the
locate receiver. The locate receiver 2200 may be projected onto the
x-y plane (z=0) along the dashed line 2202, which therefore lies in
the x-y plane. The distance between the points P1 and P2 in the x-y
plane (i.e., along the dashed line 2202) is represented by d. The
distance between the point P1 and ground is given by H (i.e., z=H).
At any given time, the locate receiver may make an angle .theta.
with respect to the x-y plane, i.e., with respect to ground in this
non-limiting example. The projection of the locate receiver on the
x-y plane, i.e., along the line 2202, may be at an angle .phi. in
the x-y plane with respect to the x axis. In some embodiments, the
x-axis may be defined to align with true North, although all
embodiments are not limited in this respect.
[0515] According to one embodiment, a locate receiver, such as
locate receiver 2200 may comprise a location tracking system at the
point P1. The location tracking system may provide the geo-location
of the point P1 with respect to the x-y plane, represented as
GPS.sub.o. The geo-location of P2 in the x-y plane may be
represented by GPS'. As will be explained, GPS' may be determined
based on a value of GPS.sub.o given by a location tracking system
and determination of suitable combinations of L, d, H, .theta., and
.phi.. The value of L may be known before the locate operation
begins, for example since it may be set after manufacture of the
locate receiver. The values of d, H, .theta., and .phi. may be
directly sensed during operation of the locate receiver or may be
calculated using suitable ones of the operational sensors 1530, as
will be described below.
[0516] According to one embodiment, the geo-location of the tip of
a locate receiver, such as locate receiver 2200, may be determined
using the value of GPS.sub.o given by the location tracking system
at P1 and accelerometer data from an accelerometer positioned at or
sufficiently near the tip of the locate receiver (i.e., at point P2
in FIG. 22). In this embodiment, it is assumed that the value of L
is known or determined in any suitable manner. The accelerometer in
this non-limiting embodiment is a 3-axis accelerometer. By suitable
analysis of the acceleration values for each axis, using known
algorithms, the angle .theta. that the locate receiver 2200 makes
with the ground may be determined (see, e.g., the previous
discussion of how to use an accelerometer as an inclinometer, as
described by Shanghai Vigor Technology Development Co.). Based on
the known distance L and the determined angle .theta., the distance
d between GPS.sub.o and GPS' in the x-y plane may be calculated
(using the fact that the cosine of .theta. is equal to d/L).
[0517] Once the distance d is known, the value of GPS' may be
derived from GPS.sub.o if the angle .phi. is known, since .phi. may
provide the direction from GPS.sub.o to GPS' (again, in some
embodiments the x-axis may be aligned with, or taken as, true
North, such that .phi. may represent an angle with respect to true
North). The value of .phi. may be determined in one of several
manners. One manner for determining .phi. is from the readout of a
compass of the locate receiver, such as previously described
compass 1704. If the location tracking system providing GPS.sub.o
is a GPS receiver, then the value of .phi. may alternatively be
taken from the heading information provided as part of the NMEA
data stream provided by the GPS receiver. A third alternative for
determining .phi. is to calculate a direction of motion based on
multiple GPS points taken from the location tracking system.
According to this third alternative, multiple GPS points taken at
different times may be used to calculate a direction of motion by,
for example, determining the direction indicated by a straight line
connecting the multiple GPS points. Other methods for determining
.phi. are also possible, as these are non-limiting examples. Once
.phi. is known, the value of GPS' may then be determined from
GPS.sub.o, d and .phi.. Once GPS' is determined, it may be used
instead of GPS.sub.o (or in addition to GPS.sub.o) as more accurate
geo-location data, which may be included, for example, in one or
more event entries and/or electronic records as discussed
above.
[0518] According to an alternative embodiment, the value of GPS'
may be determined from a measured value of GPS.sub.o using an
inclinometer on the locate receiver, such as inclinometer 1706,
previously described. The inclinometer may provide the value of
.theta.. In this embodiment, it is assumed that the value of L is
known or determined in any suitable manner. Thus, the value of d
may be determined using L and .theta., as explained above. The
value of .phi. may be determined in any suitable manner, for
example using any of the techniques described above. The value of
GPS' may then be determined from GPS.sub.o, d, and .phi., as noted
above.
[0519] According to another embodiment, the value of GPS' may be
determined from a measured value of GPS.sub.o using a proximity
sensor, such as previously described proximity sensor 1712. In this
embodiment, it is assumed that the value of L is known or
determined in any suitable manner. The proximity sensor may be
positioned at P1 and configured to measure the value of H. Assuming
that the point P2 is at or very near the ground (i.e., having a
vertical height of approximately zero), the value of H and the
known distance L of the locate receiver may be used to determine d,
for example using the Pythagorean theorem. The value of .phi. may
be determined in any suitable manner, for example using any of the
techniques described above. The value of GPS' may then be
determined using GPS.sub.o, d, and .phi..
[0520] As explained, the above-described example, in which a single
proximity sensor is used to determine the value of H, may provide
suitable results when it is assumed that the point P2 has zero
vertical height. In one embodiment, that assumption may be avoided
by also including a proximity sensor at the point P2 and configured
to measure the distance between P2 and the ground. Then, the
difference in height between P1 and P2 (rather than the value of H)
may be used in connection with the known distance L to determine
the distance d (e.g., using the Pythagorean Theorem). The value of
.phi. may be determined in any suitable manner, for example using
any of the techniques described above. The value of GPS' may then
be determined using GPS.sub.o, d, and .phi..
[0521] According to a further alternative embodiment, the value of
GPS' may be determined from a measured value of GPS.sub.o using two
3-axis accelerometers on the locate receiver. One accelerometer may
be located at the point P1 on the locate receiver, while the second
may be located at the point P2. Using the techniques described in
U.S. Patent Application Publication 2008/0255795, which is
incorporated herein by reference in its entirety, the location of
P2 relative to P1 may be determined.
[0522] As mentioned, in some instances it may be desirable to track
the motion of a specific portion of a locate receiver, such as the
tip of the locate receiver, for any one of the reasons previously
described. In those embodiments in which the locate receiver
includes a location tracking system providing a value of GPS.sub.o
for a different point on the locate receiver than the point of
interest, the tracking of the point of interest may be performed by
determining GPS' (the location of the point of interest) for each
value of GPS.sub.o as the locate receiver is moved using any of the
above-described techniques.
[0523] However, in some instances, the value of GPS.sub.o provided
by the location tracking system may not have sufficient accuracy to
allow for a desired level of accuracy in tracking the motion at the
desired point on the locate receiver (e.g., the point P2). For
example, when performing a locate operation, a technician may move
the locate receiver by distances that are relatively small compared
to the resolution of the location tracking system. For example,
when sweeping the locate receiver over the ground, the sweeping
pattern may include segments smaller than the resolution of the
location tracking system (e.g., smaller than approximately 30
inches in some embodiments). In such instances, using the
above-described techniques for determining GPS' as the point P2
moves may not sufficiently capture the movement with a desired
resolution. Thus, the techniques described below may be used.
[0524] According to one embodiment, the motion of the point P2 may
be tracked by using any of the above-described techniques to get an
initial value of GPS' and then using data from an accelerometer at
the point P2 to determine the distance traveled in the x and y
directions. This technique is commonly referred to in the relevant
arts as "dead reckoning." In this embodiment, the accelerometer may
provide acceleration data for the x and y axes. That data may be
integrated twice to determine the total distance traveled in the x
and y directions, thus giving the position of P2 at any point in
time relative to any initial GPS' value. Alternatively, the
accelerometer may output velocity data for each axis, which may be
integrated to determine the total distance traveled in the x and y
directions. A specific example is now described with respect to
FIG. 23.
[0525] FIG. 23 illustrates a top view of a non-limiting example of
a pattern of motion 2300 that may be made by a technician using one
of the locate receivers described herein. The illustrated pattern
is shown for purposes of illustration only, as it should be
appreciated that various patterns and sweeping motions may be made
by a technician using a locate receiver.
[0526] The pattern of motion 2300 comprises lines 2302a-2302f. The
solid lines in FIG. 23 correspond to when the actuation system of
the locate receiver (e.g., actuation system 120) is activated.
Lines 2304a and 2304b, described below, are shown as dashed lines
because the actuation system is not actuated as the locate receiver
traversed the paths indicated by those lines.
[0527] The making of the pattern of motion 2300 by a locate
receiver may be determined as follows. First, the technician may
begin the pattern at the point R1, at which time the technician
actuates the actuation system (e.g., to record magnetic field
data). The location of point R1 may correspond to the initial
location of the tip of the locate receiver and therefore may be
determined from a value of GPS.sub.o of the top of the locate
receiver and any of the above-described techniques for determining
the location of the tip relative to the location of the top of the
locate receiver.
[0528] The technician may then begin to move the locate receiver
along the path indicated by line 2302a, ending at the point R2. The
motion of the tip of the locate receiver along line 2302a may be
determined from the output of an accelerometer at the tip of the
locate receiver, providing an output signal for both the x and y
directions. According to one embodiment, the output of the
accelerometer is velocity data for both the x and y axes, and is
output periodically, for example twice per second, although higher
and lower data output rates are possible. The velocity values for
each of the x and y axes may be multiplied by the time duration
between samples of the accelerometer (e.g., one-half of a second in
this non-limiting example) to get the distance traveled in the x
and y directions from the initial point R1. Alternatively, the
total velocity of the locate receiver may be multiplied by the time
duration between samples of the accelerometer, and the direction of
motion may be determined by comparing the velocity values for the x
and y axes to each other, e.g., by taking the ratio of the velocity
along the x-axis to the velocity along the y-axis. Either way, the
distance traveled in the x and y directions may be determined.
[0529] In the non-limiting example of FIG. 23, the first line,
i.e., line 2302a, may serve as a base line or reference line, from
which the angle of subsequent motions may be referenced. Thus, in
FIG. 23, the angle of the second motion of the technician, from
points R2 to R3 along the path indicated by line 2304a may be
determined by reference to the direction of line 2302a since the
accelerometer output will indicate a change from the motion along
the path of line 2302a. The distance and direction of the line
2304a may be determined as described above for line 2302a. Again,
the line 2304a is shown as a dashed line, as the actuation system
of the locate receiver is not activated while the locate receiver
traverses the illustrated path.
[0530] The locate receiver is subsequently moved along line 2302b
(from point R3 to R4), then along line 2304b (from point R4 to R5),
then along line 2302c (from point R5 to R6), along line 2302d (from
point R6 to R7), along line 2302e (from point R7 to R8), and
finally along line 2302f (from point R8 back to point R5). The
length and relative direction of each of the indicated lines may be
determined as described above for line 2302a.
[0531] Thus, it should be appreciated that according to this
non-limiting embodiment, a value of GPS.sub.o provided by a
location tracking system is used only to determine the initial
location of R1, after which the locations of point R2-R8 are
determined using dead reckoning.
[0532] Also, it should be appreciated that while the relative
orientation of each of the indicated lines is determined from the
dead reckoning techniques described, the absolute, or actual,
orientation is not determined from the accelerometer data since the
actual orientation of line 2302a is not determined from the
accelerometer data. Thus, according to one embodiment an additional
step of determining an actual orientation of the line 2302a may be
performed. According to one non-limiting embodiment, the actual
orientation of line 2302a may be given by a heading provided by a
compass of the locate receiver while the line 2302a is made. Other
techniques may alternatively be used to determine the actual
direction of the first motion of the pattern of motion.
[0533] According to the above-described embodiment, the location of
the tip of a locate receiver may be determined by determining an
initial location using a location tracking system and subsequently
using the dead reckoning techniques described. Because the error
associated with dead reckoning may increase as the distance
traversed increases, it may be desirable in some embodiments to
"reset" the dead reckoning by determining a new initial location
value using a location tracking system. For example, referring to
the pattern of motion 2300, in one embodiment the location of R1
may be determined from a value of GPS.sub.o given by a location
tracking system and any of the techniques described for determining
a value of GPS' for the given GPS.sub.o. Subsequently, dead
reckoning may be used to determine the paths of lines 2302a, 2304a,
2302b, and 2304b. According to one embodiment, the location of
point R5 is not determined from dead reckoning, but rather may be
determined by getting a value of GPS.sub.o at the point R5 and
calculating a corresponding value of GPS'. Then, dead reckoning may
be used to determine the locations of lines 2302c-2302f. In this
manner, location errors that accumulate using dead reckoning may be
minimized or eliminated.
[0534] Accordingly, it should be understood that a new initial
location point serving as a starting point for the use of dead
reckoning may be set at any suitable intervals during a locate
operation. Suitable criteria for determining when to set a new
initial location point for the use of dead reckoning include
setting a new initial point for the beginning of each new motion of
a pattern that a technician makes (e.g., each new sweeping segment
of a sweeping pattern), for each new pattern, for each new locate
job, or every time the dead reckoning data indicates a threshold
total distance has been traveled (e.g., 5 meters, 10 meters, 50
meters, or any other threshold value). This list is not exhaustive,
as other criteria may also be used to determine when to set a new
initial location point for the use of dead reckoning.
X. ENHANCED USER INTERFACE
[0535] According to one aspect of the present invention, a locate
receiver may include an enhanced user interface with tactile
functionality. As will be described, the tactile functionality may
be provided in one or more of various locations on the locate
receiver, and may be used for various purposes.
[0536] FIG. 24 illustrates an example of a portion of a locate
receiver 2400 including multiple tactile indicators for providing a
tactile indication to a technician using the locate receiver. The
locate receiver 2400 may be a locate receiver according to any of
the embodiments previously described herein. The locate receiver
2400 includes a body 2410, control electronics 2412, a handle 2414
and an actuator 2416. In addition, the locate receiver 2400
includes a user interface including a display 2418, a joystick
2420, and arrow selection buttons 2422. As compared to the user
interfaces of the locate receivers previously described, the user
interface of the locate receiver 2400 also includes three tactile
indicators, 2424a-2424c, which may alternatively be referred to as
vibrating devices or vibrators.
[0537] The tactile indicator 2424a is disposed within or on the
handle 2414 of the locate receiver 2400, or otherwise mechanically
coupled to the handle 2414. The tactile indicator 2424b is disposed
within or on the joystick 2420, or is otherwise mechanically
coupled to the joystick 2420. The tactile indicator 2424c is
disposed within or on the actuator 2416, or otherwise mechanically
coupled to the actuator 2416. It should be appreciated that locate
receivers including tactile indicators according to the embodiments
described herein are not limited to having any particular number of
tactile indicators (i.e., one or more) and are not limited in the
locations at which the tactile indicators are placed.
[0538] The tactile indicators may be of any suitable type. One
example of a suitable type of tactile indicator is that used in
cellular telephones to provide the "vibrate" functionality.
According to one embodiment, one or more of the tactile indicators
is formed by a flywheel that has a weight configured to unbalance
the flywheel, so that when the flywheel spins it wobbles. According
to one embodiment, all three of the tactile indicators are the same
type, although not all embodiments are limited in this respect.
[0539] The tactile indicators 2424a-2424c may provide any suitable
type of tactile indication to a technician, in terms of duration,
frequency, intensity, pattern, and any combinations thereof. Also,
the tactile indicators 2424a-2424c need not provide the same type
of tactile indication. For example, tactile indicator 2424a may
provide a relatively strong, continuous vibration of long duration,
whereas tactile indicator 2424b may provide a series of low
intensity, short vibrations. Furthermore, one or more of the
tactile indicators may be configurable to provide multiple
different types of tactile indications. For example, in some
instances the tactile indicator 2424a may provide a long,
continuous vibration, whereas in other instances the tactile
indicator 2424a may provide a short vibration. Thus, the type(s) of
tactile indication presented by the tactile indicators is not
limiting.
[0540] According to one embodiment, the tactile indications
provided to a user may have different meanings. According to one
embodiment, the meaning may differ depending on the tactile
indicator providing the tactile indication. For example, vibration
of the tactile indicator 2424a may indicate the locate receiver
power supply is low, while vibration of the tactile indicator 2424b
may indicate the technician has tried to select an invalid entry
for a menu displayed on display 2418, and vibration of the tactile
indicator 2424c may indicate that the actuator 2416 is not
functioning. According to one embodiment, different meanings may be
conveyed by a single tactile indicator. For example, a short
vibration of tactile indicator 2424a may indicate the locate
receiver power supply is low, while a longer duration vibration of
tactile indicator 2424a may indicate, for example, that the locate
receiver is not at the correct job location, for example as may be
determined by a location tracking system of the locate receiver.
Thus, it should be appreciated that the tactile indicators may be
used to convey various messages to the technician.
[0541] According to one aspect of the present invention, one or
more of the tactile indicators 2424a-2424c may operate in response
to information collected by an environmental sensor and/or
operational sensor of the locate receiver. For example, as
described above (e.g., in connection with FIG. 19), some
embodiments of the present invention provide an alert or
notification to the locate receiver technician if an
out-of-tolerance condition is detected based on a condition sensed
by an environmental or operational sensor. As explained, the alerts
may take any suitable form including visual and/or audible. In
addition, or alternatively, the alerts may be presented via one or
more of the tactile indicators. For example, the tactile indicator
2424c may vibrate if an out-of-tolerance condition is detected that
would be adverse to performance of the locate operation.
[0542] According to one embodiment, the nature of operation of each
of the tactile indicators in FIG. 24, in terms of what triggers
vibration of the tactile indicator, the type of vibration
(intensity, duration, frequency, pattern, etc.), and the meaning
may be controlled by the control electronics 2412. For example, the
nature of operation of each of the tactile indicators may be
programmed into a processor of the control electronics (e.g.,
similar to processor 118, previously described).
[0543] In one example, the tactile sensations programmed for
tactile indicator 2424a may be associated with the general
operation of locate receiver 2400 and/or aspects of the locate
operations. In other words, conditions associated with the general
operation of locate receiver 2400 and/or aspects of the locate
operations are communicated to the user via tactile sensations at
handle 2414. In this example, tactile sensations provided at handle
2414 may be used to indicate any events that may occur on and/or
any conditions of the locate receiver. Examples of tactile
sensations that are provided at handle 2414 by tactile indicator
2424a may include, but are not limited to, the following: [0544] 1.
when powering on the locate receiver, a certain tactile sensation
may indicate the start of the boot cycle, followed by a "ready"
tactile sensation; [0545] 2. a certain tactile sensation may
indicate the status of certain calibration processes and/or testing
processes of components of the locate receiver. This status may be
indicated during or just following the boot cycle. Additionally,
this status may be indicated at any time during the operation of
the locate receiver that any component falls out of calibration;
[0546] 3. a certain tactile sensation may indicate a change in
connectivity of the locate receiver to a network (e.g., dropped or
gained WiFi connectivity); [0547] 4. a certain tactile sensation
may indicate a change in GPS connectivity (e.g., dropped or
gained); [0548] 5. certain tactile sensations may indicate that the
battery power (e.g., power supply 114) is below certain capacities
(e.g., 75%, 50%, 25% capacity); [0549] 6. a certain tactile
sensation may indicate that the locate receiver is not oriented
correctly (e.g., at the wrong angle); [0550] 7. a certain tactile
sensation may indicate that the sweeping motion of the locate
receiver is not at the correct rate (e.g., outside of tolerances
because it is either too fast or too slow); [0551] 8. a certain
tactile sensation may indicate that the signal strength indicated
by detection electronics 131 is acceptable, too low, or too high;
[0552] 9. a certain tactile sensation may indicate a change in the
depth of the source of the detected electromagnetic field; and
[0553] 10. any combinations thereof.
[0554] In one embodiment, the tactile sensations programmed for
tactile indicator 2424b at the joystick 2420 may be associated with
user interface functions. In other words, when the user is using
the joystick or buttons to navigate through menus on display 2418,
tactile feedback to the user at the joystick 2420 may be used to
communicate, for example, a validation of certain selections or
user interface functions. Examples of tactile sensations that may
be provided at joystick 2420 via tactile indicator 2424b may
include, but are not limited to, the following: [0555] 1. a certain
tactile sensation may be provided when moving from option to option
of a menu of the display 2418; [0556] 2. certain tactile sensations
may indicate the selection of different options of a menu of the
display 2418. For example: [0557] a. a certain tactile sensation
may indicate a job started selection and/or job stopped selection;
[0558] b. a certain tactile sensation may indicate that landmark
mode was selected as well as a certain type of landmark selected;
[0559] c. a certain tactile sensation may indicate that
Bluetooth.RTM. communication is enabled and/or disabled; [0560] d.
a certain tactile sensation may indicate that an invalid option has
been selected. For example, the user has selected a gas landmark,
but no gas facility is indicated on the current locate operation
work order; [0561] e. a certain tactile sensation may indicate that
a certain signal frequency range is selected; [0562] f. a certain
tactile sensation may indicate that certain signal amplitude range
is selected; and [0563] 3. any combinations thereof.
[0564] In one embodiment, the tactile sensations programmed for
tactile indicator 2424c at the actuator 2416 may be associated with
operation of the actuator 2416. Examples of tactile sensations that
may be provided via tactile indicator 2424c include, but are not
limited to, the following: [0565] 1. a certain tactile sensation
may be provided to indicate the technician should press the
actuator 2416; [0566] 2. a certain tactile sensation may be
provided to indicate the technician is not applying sufficient
force to fully engage the actuator 2416; [0567] 3. a certain
tactile sensation may be provided to indicate the technician is
applying too great a force to the actuator 2416; and [0568] 4. a
certain tactile sensation may be provided to indicate the actuator
2416 has been disabled or enabled.
[0569] Tactile sensations may also be generated based on
information received from one or more sources external to the
locate receiver, such as, but not limited to, external systems,
external networks, external computing devices, external business
applications, and external instrumentation, among others. For
example, the locate receiver (e.g., locate receiver 2400) may be in
communication with one or more external devices, such as remote
computer 150, via a network. The network may be, for example, a
local area network (LAN) and/or a wide area network (WAN). The
control electronics 2412 may be programmed to generate tactile
sensations via one or more of tactile indicators 2424a-2424c based
on information received from the remote computer 150.
[0570] Thus, further examples of scenarios which may trigger
generation of a tactile sensation via any one or more of the
tactile indicators 2424a-2424c may include, but are not limited to,
the following: [0571] 1. the locate receiver may receive workflow
information and/or a checklist with respect to performing locate
operations according, for example, to U.S. patent application Ser.
No. 12/703,809, entitled "Marking Apparatus Equipped with Ticket
Processing Software for Facilitating Marking Operations, and
Associated Methods," filed Feb. 11, 2010, which application is
hereby incorporated by reference. A certain tactile sensation may
be generated to indicate compliance and/or non-compliance with the
workflow and/or checklist; [0572] 2. the locate receiver may
receive standard operating procedure (SOP) information with respect
to performing locate operations according to, for example, the Best
Practices Version 6.0 document, published in February 2009 by the
Common Ground Alliance (CGA) of Alexandria, Va.
(www.commongroundalliance.com) and/or the Recommended Marking
Guidelines For Underground Utilities as endorsed by the National
Utility Locating Contractors Association (NULCA) of North Kansas
City, Mo. A certain tactile sensation may be generated to indicate
compliance and/or non-compliance with the SOP information; [0573]
3. the locate receiver may receive wage and hour information with
respect to performing locate operations according to, for example,
the wage and hour guidelines of one or more regulatory bodies, such
as federal, regional, state, and/or local wage and hour guidelines.
For example, a certain tactile sensation may be generated to
indicate compliance and/or non-compliance with the wage and hour
guidelines. Also, a certain tactile sensation may be generated to
indicate, for example, that it is time for a required break, it is
time for lunch, it is the end of the day, the employee is now in
overtime mode for the week, etc.; [0574] 4. the locate receiver may
receive quality assessment information with respect to performing
locate operations according to, for example, a quality assessment
application of the locate company. A certain tactile sensation may
be generated to indicate that the locate operation has passed
and/or failed the locate company's quality assessment process;
[0575] 5. the locate receiver may receive VWL information with
respect to the current locate operation according to, for example,
the VWL application that is described in U.S. Patent Application
Publication No. 20090238417, entitled "Virtual white lines for
indicating planned excavation sites on electronic images;" which is
incorporated by reference herein in its entirety. A certain tactile
sensation may be generated to indicate that the locate operation is
being performed inside and/or outside of the boundaries of the
associated VWL; [0576] 6. the locate receiver may receive
facilities maps information with respect to the current locate
operation work order. A certain tactile sensation may be generated
to indicate that the locate operation is approaching the location
of a certain facility that is indicated on the facilities maps
associated with the current locate operation work order. Also, a
tactile sensation may be generated to indicate that certain types
of facilities being located do not match the types of facilities
indicated on the facilities maps; [0577] 7. the locate receiver may
receive information about prior locate operations (e.g., historical
work order information) with respect to the location of the current
locate operation. A certain tactile sensation may be generated to
indicate that the locate operation is approaching the location of a
certain facility that is indicated in the historical information
that is associated with the current locate operation work order.
Also, a tactile sensation may be generated to indicate that certain
types of facilities being located do not match the types of
facilities indicated by the historical locate information.
[0578] It should be appreciated that information about the
generation of a tactile signal may be included in an electronic
record, a message, or any other source of information including the
other locate information described herein. For example, information
about whether a tactile signal was generated, which tactile
indicator generated the signal, the type of signal (e.g., duration,
frequency, intensity, etc.), the cause of the signal, the time of
the signal (e.g., from a timestamp), and/or the geo-location at
which the signal was issued, may be recorded, among other
things.
[0579] Table 19 illustrates an example of an event entry that may
be made in response to actuation of an actuation system of a locate
receiver, in which the locate receiver includes a tactile
indicator. The illustrated event entry is similar to that of Table
12, shown and described previously, with the addition of an
indication of whether a tactile signal was generated (e.g., a "yes"
or "no" indication being represented by "Y" and "N" for "TCTL").
Information from one or more input devices/other components of the
locate receiver is recorded with these events to provide
information about the job in progress.
TABLE-US-00023 TABLE 19 Format INFO+ LCTR: (DATE) (TIME) (GPS data)
(FACILITY TYPE) (GROUND TYPE) (MAGNETIC FIELD STRENGTH AS % OF FULL
SCALE info) (DETECTED SIGNAL FREQUENCY) (GAIN) AMB TEMP info) (SURF
TEMP info) (HUM info) (LIGHT info) (IMAGE info) (AUDIO info) (OP
TEMP info) (COMPASS info) (INCL info) (ACC1 info) (ACC2 info) (YAW
info) (PROX info) (DH1 info) (DH2 info) (TACTILE INDICATION
info)<CR><LF> Examples INFO+LCTR: DATE(2009-04-15)
TIME(12:04:44) GPS($GPGGA, 120443, 4807.038, N, 01131.000, E, 1,
08, 0.9, 545.4, M, 46.9, M,, *47) FACILITY TYPE (YELLOW) GROUND
TYPE (PAVEMENT) STRENGTH(80) FREQUENCY(512) GAIN (10) AMB TEMP(73F)
SURF TEMP(78F) HUM(31) LIGHT(1500) IMAGE(Y) AUDIO(Y) OP TEMP(97F)
COMPASS(243) INCL(-40) ACC1_x_raw(.285) ACC1_x_high(.280)
ACC1_x_low(.275) ACC1_y_raw(.385) ACC1_y_high(.382)
ACC1_y_low(.380) ACC1_z_raw(.155) ACC1_z_high(.150)
ACC1_z_low(.145) (ACC2(!) YAW(!) PROX(15) DH1(67) DH2(!)
TCTL(Y)<CR><LF> INFO+LCTR: DATE(2009-04-15)
TIME(12:04:45) GPS($GPGGA, 120445, 4807.038, N, 01131.000, E, 1,
08, 0.9, 545.4, M, 46.9, M,, *47) FACILITY TYPE (YELLOW) GROUND
TYPE (GRASS) STRENGTH(81) FREQUENCY (512) GAIN (10) AMB TEMP(73F)
SURF TEMP(78F) HUM(31) LIGHT(1500) IMAGE(Y) AUDIO(Y) OP TEMP(97F)
COMPASS(243) INCL(-40) ACC1_x_raw(.285) ACC1_x_high(.280)
ACC1_x_low(.275) ACC1_y_raw(.385) ACC1_y_high(.382)
ACC1_y_low(.380) ACC1_z_raw(.155) ACC1_z_high(.150)
ACC1_z_low(.145) ACC2(!) YAW(!) PROX(15) DH1(67) DH2(!)
TCTL(Y)<CR><LF> INFO+LCTR: DATE(2009-04-15)
TIME(12:04:46) GPS($GPGGA, 120446, 4807.038, N, 01131.000, E, 1,
08, 0.9, 545.4, M, 46.9, M,, *47) FACILITY TYPE (YELLOW) GROUND
TYPE (DIRT) STRENGTH(80) FREQUENCY(512) GAIN (11) AMB TEMP(73F)
SURF TEMP(78F) HUM(31) LIGHT(1500) IMAGE(Y) AUDIO(Y) OP TEMP(97F)
COMPASS(243) INCL(-40) ACC1_x_raw(.285) ACC1_x_high(.280)
ACC1_x_low(.275) ACC1_y_raw(.385) ACC1_y_high(.382)
ACC1_y_low(.380) ACC1_z_raw(.155) ACC1_z_high(.150)
ACC1_z_low(.145) ACC2(!) YAW(!) PROX(15) DH1(67) DH2(!)
TCTL(N)<CR><LF>
[0580] Table 20 illustrates an example of a data record that may be
generated by a locate receiver including a tactile indicator, as
well as various environmental and operational sensors. As shown,
the data record may include a "yes/no" indication of whether a
tactile signal was generated, as well as information about the type
of signal. It should be appreciated that other forms for the data
are possible and that other information regarding the tactile
indicator may be included, such as any of the types of information
described above.
TABLE-US-00024 TABLE 20 Example record of data acquired by locate
receiver 2400 upon actuation Record Service provider ID 0482 #
act-1 User ID 4815 Receiver ID 7362 Receiver Mode Mode = Peak
Timestamp data 12-Jul-2008; 09:35:15.2 Geo-location data 2650.9256,
N, 08003.5234, W Signal strength (% of 86 maximum) Gain 45 Signal
frequency (kHz) 1 Facility depth (meters) 3.4 Facility type Gas
(yellow) Ground type Pavement Locate request data Requestor: XYZ
Construction Company, Requested service address: 222 Main St,
Orlando, FL Temperature (.degree. F.) 75 Heading (degrees) 243
Inclination (degrees) 25 Acceleration (g) (x-axis) 0.75
Acceleration (g) (y-axis) 1.20 Acceleration (g) (z-axis) 0.90 Yaw
rate (degrees/sec) 10 Distance (cm) 15 Pressure (pounds/in.sup.2)
45 Image captured (Y/N) Y Audio captured (Y/N) N Tactile Signal
(Y/N) Y Type of Tactile Signal Repeating vibration; duration 3
seconds
[0581] In those embodiments in which a locate receiver includes
both a tactile indicator and at least one accelerometer, data from
the accelerometer(s) may be used to verify whether a tactile
indication was generated, as the accelerometer data may reflect any
physical movement of the locate receiver, including the physical
vibrations caused by a tactile indicator. Thus, referring again to
Table 20, for example, the acceleration data may provide
verification that the indicated tactile signal was in fact
generated.
[0582] FIG. 25 illustrates a locate transmitter that includes a
tactile indicator, according to one embodiment of the present
invention. The foregoing discussion with respect to tactile
indicators on a locate receiver is applicable in the context of
locate transmitters, such that much of the discussion is not now
repeated, as it should be understood that the concepts described
above are applicable to the locate transmitter of FIG. 25.
[0583] As shown, the locate transmitter 2500 includes a body 2502
having a handle 2504. The locate transmitter includes a power
source 2506, which may be and function substantially the same as
previously described power source 114. Also, the locate transmitter
2500 includes control electronics 2508, which may be similar to or
substantially the same as previously described control electronics
112. For example, the control electronics 2508 may include a
processor, a local memory, a timing system, a location tracking
system, a user interface, and a communication interface, one or
more of which may be substantially the same as the corresponding
components of control electronics 112. The locate transmitter 2500
also includes an applied signal output 2510 for providing an
applied signal along a facility.
[0584] Furthermore, the locate transmitter includes a tactile
indicator 2512 in, on, or otherwise mechanically coupled to the
handle 2504. The tactile indicator 2512 may be substantially the
same as any of the tactile indicators 2424a-2424c described in
connection with FIG. 24. Thus, the tactile indicator 2512 may
vibrate or otherwise provide a tactile indication to a technician.
The tactile indication may be of any suitable type in terms of
pattern, intensity, and duration. Moreover, the tactile indicator
2512 may be configured to provide multiple different types of
tactile indications, for example with the different types having
different meanings. The type and meaning of a tactile indication
provided by tactile indicator 2512 may be, in one embodiment,
programmed or otherwise controlled by a processor of the control
electronics 2508, in the same manner as that described above with
respect to tactile indicators 2424a-2424c being controlled at least
in part by the processor 118.
[0585] The tactile indicator 2512 may be triggered in response to
one of various conditions, such as those previously described with
respect to tactile indicators 2424a-2424c that are applicable in
the context of locate transmitters. For example, out-of-tolerance
environmental and/or operational conditions may trigger the tactile
indicator 2512. Events relating to the general operation of the
locate transmitter 2500 may trigger a tactile indication, such as
but not limited to: [0586] when powering on the locate transmitter,
a certain tactile sensation may indicate the start of the boot
cycle, followed by a "ready" tactile sensation; [0587] a certain
tactile sensation may indicate the status of certain calibration
processes and/or testing processes of components of the locate
transmitter. This status may be indicated during or just following
the boot cycle. Additionally, this status may be indicated at any
time during the operation of the locate transmitter that any
component falls out of calibration; [0588] a certain tactile
sensation may indicate a change in WiFi connectivity (dropped or
gained); [0589] a certain tactile sensation may indicate a change
in GPS connectivity (dropped or gained); [0590] certain tactile
sensations may indicate that the battery power (e.g., power source
2506) is below certain capacities (e.g., 75%, 50%, 35% capacity);
[0591] a certain tactile sensation may indicate that the locate
transmitter is well connected (i.e., a good electrical connection)
or poorly connected (i.e., a poor electrical connection) to the
target underground facility; [0592] a certain tactile sensation may
indicate that the locate transmitter is not electrically grounded,
or poorly electrically grounded; [0593] a certain tactile sensation
may indicate that Bluetooth.RTM. communication is enabled and/or
disabled; [0594] a certain tactile sensation may indicate that a
certain applied signal frequency range is selected; [0595] a
certain tactile sensation may indicate that a certain applied
signal amplitude range is selected; and [0596] any combinations
thereof.
[0597] Information received from external sources (e.g., a remote
device, such as a remote computer) may trigger the tactile
indicator 2512. For example, any of the above-described types of
information possibly received by locate receiver 2400 may similarly
be received by locate transmitter 2500 and may trigger a tactile
sensation (e.g., checklist information, SOP information, wage and
hour information, quality assessment information, VWL information,
facilities maps information, and/or information about prior locate
operations, among others). Thus, any of the following types of
alerts may be generated via tactile indicator 2512: [0598] an alert
to indicate non-compliance with a checklist; [0599] an alert to
indicate non-compliance with an SOP; [0600] an alert based on wage
and hour guidelines (e.g., an alert to indicate that it is time for
a required break, it is time for lunch, it is the end of the day,
the locate technician is now in overtime mode for the week, etc.);
[0601] an alert from the home office to indicate to the locate
technician to move from his/her present location to another
location to perform an emergency locate operation; [0602] an alert
to indicate that the locate operation has failed the locate
company's quality assessment process; [0603] an alert to indicate
that the locate operation is being performed outside of the
boundaries of the associated VWL; [0604] an alert to indicate that
the selected frequency range and/or amplitude range of a locate
receiver does not match the selected frequency range and/or
amplitude range of the locate transmitter; [0605] an alert to
indicate that the signal connection and/or ground connection of the
locate transmitter is poorly connected to the target underground
facility; and [0606] an alert to indicate that a component of the
locate transmitter has fallen out of calibration.
[0607] It should be appreciated that the examples described above
with respect to the types of tactile indications which may
generated by tactile indicator 2512, their causes, and their
meanings, are not limiting, but rather are provided for purposes of
illustration. Other causes of tactile indications are possible, as
are other types of tactile indications. Furthermore, while FIG. 25
illustrates a single tactile indicator 2512, not all embodiments of
a locate transmitter having a tactile indicator are limited in this
manner. For example, a locate transmitter may have one or more
tactile indicators according to various embodiments described
herein.
[0608] Furthermore, electronic records and event entries may be
generated based on operation of the locate transmitter 2500, which
records and entries may include an indication of whether a tactile
signal was generated, and if so, what kind, at what time, at what
location, and whether it was acknowledged, among other things.
Thus, entries and records such as those of Tables 19 and 20 may be
generated in the context of the locate transmitter 2500.
[0609] It should be appreciated that many of the aspects of the
present invention described above also apply to a combination
locate and marking device. As explained, a locate receiver is a
device typically used to locate an underground facility, after
which the location may be marked using a marking device. According
to one embodiment, a single device may perform the function of a
locate receiver and a marking device, and thus may be a combination
locate and marking device, as described in U.S. patent application
Ser. No. 12/569,192, filed on Sep. 29, 2009 under Attorney Docket
No. D0687.70010US01 and titled "Methods, Apparatus, and Systems For
Generating Electronic Records Of Locate And Marking Operations, And
Combined Locate And Marking Apparatus For Same," which is hereby
incorporated herein by reference in its entirety. The various
aspects described herein relating to locate receivers may also
apply to such combination locate and marking devices as those
described in U.S. patent application Ser. No. 12/569,192.
XI. LOCATE TRANSMITTER WITH ENHANCED GROUND PROBE
[0610] According to one embodiment of the present invention, a
locate transmitter includes an enhanced ground probe for
determining one or more characteristics of the ground (or other
material) into which it is inserted. When using a locate
transmitter in a conductive mode of operation, the transmitter may
be suitably electrically grounded by connecting to a ground stake,
for example a metal rod inserted into the ground. The quality of
the electrical grounding may depend on characteristics of the
ground into which the stake is inserted, such as the moisture
content, iron content, soil type (e.g., sandy, clay, etc.) and pH,
among others. Accordingly, one embodiment of the present invention
provides one or more ground probes for grounding a locate
transmitter that also measures one or more of moisture content, pH,
or other characteristics of interest of the ground. FIG. 27
illustrates a non-limiting example.
[0611] The locate transmitter 2700 of FIG. 27 may be substantially
similar to previously described locate transmitter 2500, and thus
includes some of the same reference numbers. In addition, locate
transmitter 2700 includes a signal lead 2702 (e.g., a wire)
terminating with a clamp 2704 for clamping to a connection point of
a target facility. The signal lead 2702, which is connected to the
applied signal output 2510, provides the applied signal to the
target facility. The locate transmitter 2700 also includes a ground
lead 2706 terminating with one or more ground probe 2708. The
ground probe 2708 may be configured to be inserted into the
physical ground to establish an electrical ground connection for
the locate transmitter 2700.
[0612] The one or more ground probes 2708 may each be configured to
sense one or more of moisture content, iron content, soil type and
pH of the ground into which it is inserted, using techniques known
to those of skill in the art. The sensed information may be
provided to control electronics 2508 (e.g., a processor or memory
of the control electronics) for storage in an electronic record,
processing, transmission to an external device (e.g., remote
computer 150) or any of the other uses of information described
herein. According to one embodiment, an alert may be generated to a
technician using the locate transmitter 2700 if the sensed moisture
and/or pH indicate an out-of-tolerance condition, e.g., a condition
not suitable for making a good electrical ground. According to one
embodiment, the locate transmitter may be disabled (e.g., any
applied signal may be inhibited) in response to detecting such a
condition. Other actions may also be taken in response to detecting
such a condition, according to the various aspects described
herein.
[0613] It should be appreciated that locate transmitters including
a ground probe of the type illustrated in FIG. 27 need not include
tactile indicators or the other features of the locate transmitter
2700. Rather, the locate transmitter 2700 represents a non-limiting
example only.
XII. DETERMINATION OF DISTANCES BETWEEN LOCATE TRANSMITTER AND
CONNECTION POINTS
[0614] According to another embodiment, it may desirable to know a
distance between the body of a locate transmitter, the connection
point (e.g., clamp) for connecting to a facility, and the
connection point to electrical ground (e.g., to a ground stake).
For example, there may be recommended distances between the ground
connection point (e.g., the location of a ground stake or ground
probe), the body of the transmitter, and the point at which the
transmitter connects to the target facility. Referring to FIG. 27
as a non-limiting example, there may be preferred distances between
the body 2502, the clamp 2704 (when clamped), and the ground probe
2708 (when inserted into the ground or other material). Deviation
from such preferred distances may result in electrical
interference, compromising the quality of an applied signal, or
otherwise degrading performance of the locate transmitter. Thus,
according to one embodiment of the present invention, apparatus and
methods are provided for determining the distances between such
components.
[0615] According to a first embodiment, the distances between a
locate transmitter body, a connection point of the locate
transmitter to a target facility, and a ground connection point
(e.g., the location of a ground stake) may be determined by
providing a location tracking system (e.g., a GPS receiver, as
previously described) for each of the points of interest. For
example, referring to FIG. 27, each of the body 2502, clamp 2704,
and ground probe 2708 may include a GPS receiver. Thus, the
distances between the components may be determined from the GPS
data provided by the GPS receivers.
[0616] According to another embodiment, the distances between the
components may be determined using a landmark mode of the locate
transmitter or of a locate receiver. For example, as previously
explained, landmark mode functionality may allow for recording of
geo-location information of landmarks of interest. According to one
embodiment, a locate receiver with landmark mode functionality may
be used to record the geo-location of each of the body 2502, clamp
2704, and ground 2708, from which the distances between the
components may be determined. Alternatively, the locate transmitter
itself may have landmark mode functionality and may be used to
determined the geo-location of the components of interest.
[0617] According to a further embodiment, a locate transmitter may
include one or more proximity sensors which may be used to
determine the distances between components. For example, the locate
transmitter 2700 may include a proximity sensor which may be
implemented to measure a distance between the body 2502 and the
ground probe 2708. Similarly, the distance between the body 2502
and the clamp 2704 may be determined with the proximity sensor.
[0618] Other manners of determining the distances between a locate
transmitter, a connection point to a target facility, and an
electrical ground connection point are also possible, as the
above-described examples are non-limiting. Furthermore, while the
foregoing description references the locate transmitter 2700 as an
example, it should be appreciated that the techniques may be
applied to various types of locate transmitters and that, for
example, the locate transmitter need not include a probe like
ground problem 2708 for measuring characteristics of the
ground.
[0619] Information about the distances between the locate
transmitter body, the electrical ground connection point, and the
connection point to the target facility may be used in any of the
manners previously described for other types of locate-related
information. According to one embodiment, the information may be
recorded in an electronic record. According to another embodiment,
an alert may be generated and provided to a technician using the
locate transmitter if the determined distances do not
satisfactorily compare to pre-determined or accepted values. For
example, if the distances are too short (e.g., indicating the
possibility of electrical interference), an alert may be generated.
Moreover, according to one embodiment the locate transmitter may be
disabled (e.g., generation of the applied signal may be inhibited)
if the measured distances do not satisfactorily compare to
pre-determined or accepted values. Other types of responses are
also possible, as those listed are non-limiting examples.
XIII. CONCLUSION
[0620] As discussed herein, a wide variety of information/data may
be acquired and analyzed in connection with locate operations, for
a variety of purposes. The data of interest that may be acquired
and analyzed may include, but is not limited to, timestamp data,
geo-location information of detected facilities, geo-location
information of environmental landmarks, direction information, any
information included in the standard data stream of the locate
tracking system (e.g., GPS system), color/type of detected
facilities, ID information (e.g., individual, vehicle, wage and/or
hour compliance), battery status of the locate device,
wired/wireless connection status, Bluetooth.RTM. signal strength,
storage capacity of the local memory, temperature, humidity, light
level, movement of the locate device, mode of operation of the
locate device, charging state of the locate device (e.g.,
charging/not charging), alerts against expectations in performance,
and any combination thereof.
[0621] The information, such as shown in various tables herein,
that may be acquired by use of the data acquisition system and
methods described herein, may be used for any purpose. In an
embodiment, the information of the data acquisition system may be
analyzed against expected locate operations in order to gain
benefits in, for example, operating efficiency, personnel
management, inventory management, quality control, training
operations, safety, customer satisfaction, and the like.
[0622] Additionally, the information that is acquired by use of the
data acquisition system and the methods of the present disclosure
may be correlated to other aspects of locate and marking
operations. For example, the locate device data streams (e.g.,
respective event entries or one or more electronic records
transmitted by the locate device) may be correlated to other data
streams of multiple locate devices or any other devices in order to
aggregate, assess, evaluate, draw insights from, take action on
this information, and any combination thereof. Correlating
disparate data streams may be useful in order to better interpret
and/or gain new interpretations that are useful. For example, by
analyzing the aggregated data, field service providers may gain
visibility into the distributed workforce, may take corrective
and/or any other constructive action to improve process management,
may improve and/or develop best practices, and any combination
thereof. In an embodiment, certain trends may be identified by
correlating historical records of the amount of time that is spent
performing locate and marking operations to other information, such
as, but not limited to, the time of day, time of year, address of
the locate site, experience of the locate technician, weather
conditions, heavy or light traffic times, and the like.
[0623] While various inventive embodiments have been described and
illustrated herein, those of ordinary skill in the art will readily
envision a variety of other means and/or structures for performing
the function and/or obtaining the results and/or one or more of the
advantages described herein, and each of such variations and/or
modifications is deemed to be within the scope of the inventive
embodiments described herein. More generally, those skilled in the
art will readily appreciate that all parameters, dimensions,
materials, and configurations described herein are meant to be
exemplary and that the actual parameters, dimensions, materials,
and/or configurations will depend upon the specific application or
applications for which the inventive teachings is/are used. Those
skilled in the art will recognize, or be able to ascertain using no
more than routine experimentation, many equivalents to the specific
inventive embodiments described herein. It is, therefore, to be
understood that the foregoing embodiments are presented by way of
example only and that, within the scope of the appended claims and
equivalents thereto, inventive embodiments may be practiced
otherwise than as specifically described and claimed. Inventive
embodiments of the present disclosure are directed to each
individual feature, system, article, material, kit, and/or method
described herein. In addition, any combination of two or more such
features, systems, articles, materials, kits, and/or methods, if
such features, systems, articles, materials, kits, and/or methods
are not mutually inconsistent, is included within the inventive
scope of the present disclosure.
[0624] The above-described embodiments can be implemented in any of
numerous ways. For example, the embodiments may be implemented
using hardware, software or a combination thereof. When implemented
in software, the software code can be executed on any suitable
processor or collection of processors, whether provided in a single
computer or distributed among multiple computers.
[0625] The various methods or processes outlined herein may be
coded as software that is executable on one or more processors that
employ any one of a variety of operating systems or platforms.
Additionally, such software may be written using any of a number of
suitable programming languages and/or programming or scripting
tools, and also may be compiled as executable machine language code
or intermediate code that is executed on a framework or virtual
machine.
[0626] In this respect, various inventive concepts may be embodied
as a computer readable storage medium (or multiple computer
readable storage media) (e.g., a computer memory, one or more
floppy discs, compact discs, optical discs, magnetic tapes, flash
memories, circuit configurations in Field Programmable Gate Arrays
or other semiconductor devices, or other non-transitory medium or
tangible computer storage medium) encoded with one or more programs
that, when executed on one or more computers or other processors,
perform methods that implement the various embodiments of the
invention discussed above. The computer readable medium or media
can be transportable, such that the program or programs stored
thereon can be loaded onto one or more different computers or other
processors to implement various aspects of the present invention as
discussed above.
[0627] The terms "program" or "software" are used herein in a
generic sense to refer to any type of computer code or set of
computer-executable instructions that can be employed to program a
computer or other processor to implement various aspects of
embodiments as discussed above. Additionally, it should be
appreciated that according to one aspect, one or more computer
programs that when executed perform methods of the present
invention need not reside on a single computer or processor, but
may be distributed in a modular fashion amongst a number of
different computers or processors to implement various aspects of
the present invention.
[0628] Computer-executable instructions may be in many forms, such
as program modules, executed by one or more computers or other
devices. Generally, program modules include routines, programs,
objects, components, data structures, etc. that perform particular
tasks or implement particular abstract data types. Typically the
functionality of the program modules may be combined or distributed
as desired in various embodiments.
[0629] Also, data structures may be stored in computer-readable
media in any suitable form. For simplicity of illustration, data
structures may be shown to have fields that are related through
location in the data structure. Such relationships may likewise be
achieved by assigning storage for the fields with locations in a
computer-readable medium that conveys relationship between the
fields. However, any suitable mechanism may be used to establish a
relationship between information in fields of a data structure,
including through the use of pointers, tags or other mechanisms
that establish relationship between data elements.
[0630] Also, various inventive concepts may be embodied as one or
more methods, of which an example has been provided. The acts
performed as part of the method may be ordered in any suitable way.
Accordingly, embodiments may be constructed in which acts are
performed in an order different than illustrated, which may include
performing some acts simultaneously, even though shown as
sequential acts in illustrative embodiments.
[0631] All definitions, as defined and used herein, should be
understood to control over dictionary definitions, definitions in
documents incorporated by reference, and/or ordinary meanings of
the defined terms.
[0632] The indefinite articles "a" and "an," as used herein in the
specification and in the claims, unless clearly indicated to the
contrary, should be understood to mean "at least one."
[0633] The phrase "and/or," as used herein in the specification and
in the claims, should be understood to mean "either or both" of the
elements so conjoined, i.e., elements that are conjunctively
present in some cases and disjunctively present in other cases.
Multiple elements listed with "and/or" should be construed in the
same fashion, i.e., "one or more" of the elements so conjoined.
Other elements may optionally be present other than the elements
specifically identified by the "and/or" clause, whether related or
unrelated to those elements specifically identified. Thus, as a
non-limiting example, a reference to "A and/or B", when used in
conjunction with open-ended language such as "comprising" can
refer, in one embodiment, to A only (optionally including elements
other than B); in another embodiment, to B only (optionally
including elements other than A); in yet another embodiment, to
both A and B (optionally including other elements); etc.
[0634] As used herein in the specification and in the claims, "or"
should be understood to have the same meaning as "and/or" as
defined above. For example, when separating items in a list, "or"
or "and/or" shall be interpreted as being inclusive, i.e., the
inclusion of at least one, but also including more than one, of a
number or list of elements, and, optionally, additional unlisted
items. Only terms clearly indicated to the contrary, such as "only
one of" or "exactly one of," or, when used in the claims,
"consisting of," will refer to the inclusion of exactly one element
of a number or list of elements. In general, the term "or" as used
herein shall only be interpreted as indicating exclusive
alternatives (i.e. "one or the other but not both") when preceded
by terms of exclusivity, such as "either," "one of," "only one of,"
or "exactly one of." "Consisting essentially of," when used in the
claims, shall have its ordinary meaning as used in the field of
patent law.
[0635] As used herein in the specification and in the claims, the
phrase "at least one," in reference to a list of one or more
elements, should be understood to mean at least one element
selected from any one or more of the elements in the list of
elements, but not necessarily including at least one of each and
every element specifically listed within the list of elements and
not excluding any combinations of elements in the list of elements.
This definition also allows that elements may optionally be present
other than the elements specifically identified within the list of
elements to which the phrase "at least one" refers, whether related
or unrelated to those elements specifically identified. Thus, as a
non-limiting example, "at least one of A and B" (or, equivalently,
"at least one of A or B," or, equivalently "at least one of A
and/or B") can refer, in one embodiment, to at least one,
optionally including more than one, A, with no B present (and
optionally including elements other than B); in another embodiment,
to at least one, optionally including more than one, B, with no A
present (and optionally including elements other than A); in yet
another embodiment, to at least one, optionally including more than
one, A, and at least one, optionally including more than one, B
(and optionally including other elements); etc.
[0636] In the claims, as well as in the specification above, all
transitional phrases such as "comprising," "including," "carrying,"
"having," "containing," "involving," "holding," "composed of," and
the like are to be understood to be open-ended, i.e., to mean
including but not limited to. Only the transitional phrases
"consisting of" and "consisting essentially of" shall be closed or
semi-closed transitional phrases, respectively, as set forth in the
United States Patent Office Manual of Patent Examining Procedures,
Section 2111.03.
* * * * *
References