U.S. patent application number 14/253833 was filed with the patent office on 2014-08-14 for wireless tracking system and method for analyzing an interaction between objects.
This patent application is currently assigned to Awarepoint Corporation. The applicant listed for this patent is Awarepoint Corporation. Invention is credited to Matthew R. Perkins.
Application Number | 20140229196 14/253833 |
Document ID | / |
Family ID | 42826944 |
Filed Date | 2014-08-14 |
United States Patent
Application |
20140229196 |
Kind Code |
A1 |
Perkins; Matthew R. |
August 14, 2014 |
Wireless Tracking System And Method For Analyzing An Interaction
Between Objects
Abstract
The present invention provides a solution to determining an
interaction between objects through wireless tracking. The present
invention utilizes communication devices attached to objects that
transmit signals for reception by sensors stationed throughout a
facility which forward the signals to an information engine for
analysis.
Inventors: |
Perkins; Matthew R.; (San
Diego, CA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Awarepoint Corporation |
San Diego |
CA |
US |
|
|
Assignee: |
Awarepoint Corporation
San Diego
CA
|
Family ID: |
42826944 |
Appl. No.: |
14/253833 |
Filed: |
April 15, 2014 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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13646640 |
Oct 5, 2012 |
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14253833 |
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12484236 |
Jun 14, 2009 |
8285564 |
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13646640 |
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61166755 |
Apr 5, 2009 |
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Current U.S.
Class: |
705/2 |
Current CPC
Class: |
G16H 40/67 20180101;
G06Q 30/04 20130101; G06Q 10/06 20130101 |
Class at
Publication: |
705/2 |
International
Class: |
G06Q 50/22 20060101
G06Q050/22; G06Q 10/06 20060101 G06Q010/06 |
Claims
1. A system for analyzing an interaction between objects bearing
wireless communication devices within a facility, the system
comprising: a plurality of sensors located within the facility; an
information engine in communication with the plurality of sensors;
a plurality of first objects, each of the plurality of first
objects comprising a first wireless communication device; and a
plurality of second objects, each of the plurality of second
objects comprising a second wireless communication device; wherein
the plurality of plug-in sensors are utilized for
infrastructure-based real-time location tracking of the plurality
of first objects and the plurality of second objects in the
facility; wherein each sensor of the plurality of sensors
communicates with other sensors of the plurality of sensors
utilizing a wireless communication format; wherein the plurality of
sensors receives a wireless signal from the first wireless
communication device of each of the plurality of first objects;
wherein the plurality of sensors receives a wireless signal from
the second wireless communication device of each of the plurality
of second objects; wherein the information engine is configured to
analyze an interaction between a first object and a second object
having an interaction based on a plurality of factors comprising at
least a position location of the interaction, an identification of
the first object, an identification of the second object, and a
duration of the interaction.
2. The system according to claim 1 wherein the first object is
fixed or mobile and the second object is mobile.
3. The system according to claim 1 wherein the first object is a
group of objects and the second object is a group of objects.
4. The system according to claim 1 the first object is fixed and
the second object is a group of objects.
5. The system according to claim 1 wherein the first object is
mobile and the second object is a group of objects.
6. The system according to claim 1 wherein the first object is a
group of mobile objects and the second object is a group of mobile
objects.
7. The system according to claim 1 wherein the first object is a
first person and the second object is a second person and the
plurality of factors further comprises a position designation of
the first person and a position designation of the second
person.
8. The system according to claim 1 wherein the first object is a
first person and the second object is a second person and the
plurality of factors further comprises a number of previous
interactions between the first person and the second person within
a predetermined time period.
9. The system according to claim 1 wherein each of the first
plurality of wireless communication devices is mounted on a
corresponding identification card or is an identification card.
10. The system according to claim 1 wherein the plurality of
factors further comprises a previous location of the first object,
a previous location of the second object and the number of other
objects located near the interaction.
11. A method for analyzing an interaction between objects bearing
wireless communication devices within a facility, the method
comprising: transmitting a first wireless signal from a first
wireless communication device associated with a first person;
transmitting a second wireless signal from a second wireless
communication device associated with a second person; receiving the
first wireless signal and the second wireless signal at a plurality
of sensors located within the facility and utilized for
infrastructure-based real-time location tracking of objects and
individuals in the facility, each sensor of the plurality of
sensors communicating with other sensors of the plurality of
sensors utilizing a wireless communication format; determining that
an interaction is occurring between the first person and the second
person based on the first wireless signal and the second wireless
signal; determining a business relationship between the first
person and the second person based on at least one of a plurality
of factors comprising a position location of the interaction, a
duration of the interaction, a previous location of the first
person prior to the interaction, a previous location of the second
person prior to the interaction and the number of other persons at
the interaction.
12. The method according to claim 11 wherein the plurality of
factors further comprises a position designation of the first
person, a number of previous interactions between the first person
and the second person within a predetermined time period, and a
position designation of the second person.
13. The method according to claim 11 wherein the plurality of
factors further comprises a previous location of the first object,
a previous location of the second object and the number of other
objects located near the interaction.
14. The method according to claim 11 further comprising receiving
the first wireless signal from the first wireless communication
device at the second wireless communication device.
15. A system for analyzing an interaction between objects bearing
wireless communication devices within a facility, the system
comprising: a plurality of peer-to-peer communication devices, each
of the plurality of peer-to-peer wireless communication devices
associated with an individual person, each of the plurality of
peer-to-peer wireless communication devices transmitting a wireless
signal; a plurality of sensors located within the facility; an
information engine in communication with the plurality of sensors;
wherein each sensor of the plurality of sensors communicates with
other sensors of the plurality of sensors utilizing a wireless
communication format; wherein the plurality of sensors receives the
wireless signal from the plurality of peer-to-peer wireless
communication devices; wherein the information engine is configured
to analyze an interaction between plurality of peer-to-peer
wireless communication devices based on a plurality of factors
comprising at least a position location of the interaction, an
identification of the first object, an identification of the second
object, and a duration of the interaction.
16. The system according to claim 15 wherein the information engine
analyzes the interaction to determine a billing charge for services
of the first person.
17. The system according to claim 15 wherein the facility is a
hospital and the information engine analyzes the interaction to
determine medical services provided to a patient.
Description
CROSS REFERENCES TO RELATED APPLICATIONS
[0001] The Present application is a continuation application of
U.S. patent application Ser. No. 13/646,640, filed on Oct. 5, 2012,
which is a continuation application of U.S. patent application Ser.
No. 12/484,236, filed on Jun. 14, 2009, now U.S. Pat. No.
8,285,564, issued on Oct. 9, 2012, which claims priority to U.S.
Provisional Patent Application No. 61/166,755, filed on Apr. 5,
2009, now abandoned.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
[0002] Not Applicable
BACKGROUND OF THE INVENTION
[0003] 1. Field of the Invention
[0004] The present invention is related to wireless tracking
systems and methods. More specifically, the present invention
relates to a system and method for analyzing an interaction between
objects such as people.
[0005] 2. Description of the Related Art
[0006] Real-time knowledge of resources, whether the resources are
assets or people, is becoming a necessary tool of many businesses.
Real-time knowledge of the location, status and movement of crucial
resources can allow a business to operate more efficiently and with
fewer errors. However, many businesses employ hundreds if not
thousands of resources in a single facility, and these resources
need to be accounted for by a central system that is user
friendly.
[0007] For example, in a typical hospital there are numerous shifts
of employees that utilize the same equipment. When a new shift
arrives, the ability to quickly locate medical equipment not only
results in a more efficient use of resources, but also can result
in averting a medical emergency. Thus, the tracking of medical
equipment in a hospital is becoming a standard practice.
[0008] The tracking of objects in other facilities is rapidly
becoming a means of achieving greater efficiency. A typical radio
frequency identification system includes at least multiple tagged
objects, each of which transmits a signal, multiple receivers for
receiving the transmissions from the tagged objects, and a
processing means for analyzing the transmissions to determine the
locations of the tagged objects within a predetermined
environment.
[0009] Several prior art references discloses various tracking
systems.
[0010] McKee et al., U.S. Pat. No. 6,915,135 discloses a system for
determining presence, identity and duration of presence in a given
area (a table in a restaurant) of an object (tag attached to a
waiter).
[0011] Lester, U.S. Pat. No. 3,805,265 discloses a location system
that uses line-of-sight radiant wave energy for signal
transmission.
[0012] Schwengler U.S. Pat. No. 7,050,819, is directed at the
problem of adequate power for a mobile telephone for a two-way
communication function or a regeneration function as a node of a
mesh network.
[0013] Christ, U.S. Pat. No. 5,977,913, discloses a radiofrequency
system that is utilized within a prison and allows for an
individual to be located after an alarm is triggered by the
individual.
[0014] Zodnik, U.S. Patent Publication Number 2004/0147232,
discloses wall-mounted (RJ-11 or RJ-45) wireless transceivers
configured to only track the location of a self-identified wireless
communication device in order to communicate the location of the
self-identified wireless communication device to an emergency
service such as 911.
[0015] Welch et al., U.S. Pat. No. 7,382,247 for a Personal Status
Physiologic Monitor System And Architecture And Related Monitoring
Methods, discloses a systems for monitoring a patient that uses a
personal status monitoring device, such as a ECG electrode
assembly, which transmits a signal to an intermediary device, such
as a PDA, which transmits to a server using a WLAN.
[0016] Tessier et al., U.S. Pat. No. 7,403,111 for a Location
System Using A First Signal To Gate A Second Signal, discloses an
object identifier that transmits both an IR signal and a RF signal
for location determination.
[0017] Dempsey et al., U.S. Pat. No. 7,053,831 for a Location
System, discloses a system which allows for a location to be
determined without requiring precise calculations through use of an
object identifier that transmits one identifier corresponding to an
object identifier and a second identifier which is a group
identifier.
[0018] Dempsey, U.S. Pat. No. 7,099,895 for a System And Method For
Performing Object Association Using A Location Tracking System,
discloses a system for recording object associations based on
signals for object identifiers.
[0019] Eagle et al., U.S. Patent Publication Number 2005/0250552,
for a Combined Short Range Radio Network And Cellular Telephone
Network For Interpersonal Communications, discloses a system that
uses BLUETOOTH technology integrated in a cellular telephone to
provide interpersonal communications between individuals.
[0020] As stated above, the problem is inadequate resource
visibility in a business. Businesses such as hospitals, need to
locate resources (assets and people), know the status of the
resources, and understand the usage history of the resources to
enable business improvement.
[0021] Specific problems for hospitals include tracking infections
in a hospital to determine a source and other areas or individuals
that may be infected. Other problems include spotting emerging
patterns of infection and outbreaks to mitigate those affected.
Further, for MEDICARE and other insurance providers, hospitals and
other medical facilities need to demonstrate that patients received
their required care in order to receive payment for such care. The
prior art has failed to provide an adequate solution to these
problems.
BRIEF SUMMARY OF THE INVENTION
[0022] The present invention provides a solution to determining an
interaction between objects through wireless tracking. The present
invention utilizes communication devices attached to objects that
transmit signals for reception by sensors stationed throughout a
facility which forward the signals to an information engine for
analysis.
[0023] One aspect of the present invention is a system for
determining a business relationship between individuals within a
facility. The system includes multiple first tags, multiple second
tags, a mesh network and an information engine. The mesh network is
preferably a 802.15.4 ZIGBEE wireless sensor network. Each of the
first tags represents a first object. Each of the second tags
represents a second object. The mesh network includes multiple
plug-in sensors located within the facility. The information engine
is in communication with the mesh network. The information engine
determines a business relationship between a first object and a
second object having an interaction based on at least two of
multiple factors which include a position location of the
interaction, a duration of the interaction, a previous location of
the first object, a previous location of the second object and the
number of other objects located near the interaction.
[0024] In a preferred embodiment, the first object is a first
person and the second object is a second person and the plurality
of factors further includes a position designation of the first
person and a position designation of the second person and a number
of previous interactions between the first person and the second
person within a predetermined time period. Alternatively, the first
object is fixed or mobile and the second object is mobile.
Alternatively, the first object is a group of objects and the
second object is a group of objects. Alternatively, the first
object is fixed and the second object is a group of objects.
Alternatively, the first object is mobile and the second object is
a group of objects. Alternatively, the first object is a group of
mobile objects and the second object is a group of mobile objects.
Each of the first tags can be mounted on a corresponding
identification card, or can be an identification card.
[0025] Another aspect of the present invention is a method for
determining a business relationship between individuals within a
facility. The method includes transmitting a signal from a first
tag associated with a first person. The method also includes
transmitting a signal from a second tag associated with a second
person. The method also includes receiving the signal from the
first tag and the signal from the second tag at a mesh network
established within the facility. The method also includes
determining that an interaction is occurring between the first
person and the second person. The method also includes determining
a business relationship between the first person and the second
person based on multiple factors. The multiple factors can include
a position location of the interaction, a duration of the
interaction, a previous location of the first person prior to the
interaction, a previous location of the second person prior to the
interaction, a position designation of the first person and a
position designation of the second person, a number of previous
interactions between the first person and the second person within
a predetermined time period, and the number of other persons at the
interaction.
[0026] Yet another aspect of the present invention is a system for
determining a business relationship between individuals within a
facility. The system includes multiple peer-to-peer communication
devices, multiple tags, a mesh network and an information engine.
Each of the peer-to-peer communication devices is associated with
an individual person. Each of the tags represents a first object.
The mesh network includes multiple plug-in sensors located within
the facility. The information engine is in communication with the
mesh network. The information engine analyzes an interaction
between a first object and a second object based on multiple
factors. The multiple factors include a position location of the
interaction, a duration of the interaction, a previous location of
the first person prior to the interaction, and information for a
mobile object within a predetermined distance of the location of
the interaction.
[0027] In one example, the information engine analyzes the
interaction to determine a billing charge for services of the first
person. In another example, the facility is a hospital and the
information engine analyzes the interaction to determine medical
services provided to a patient.
[0028] Yet another aspect of the present invention is a system for
analyzing an action of an individual. The system includes tracking
devices, tags, a mesh network and an information engine. Each of
the tracking devices is associated with an individual person. Each
of the tags is associated with a mobile object. The mesh network
includes multiple sensors positioned within a facility. The mesh
network receives transmissions from each tags and each of the
tracking devices. The information engine is in communication with
the mesh network. The information engine analyzes an action of a
first person based on a plurality of factors including a position
location of the action, a duration of the action, a previous
location of the first person prior to the action, and information
for a mobile object within a predetermined distance of the location
of the action.
[0029] Having briefly described the present invention, the above
and further objects, features and advantages thereof will be
recognized by those skilled in the pertinent art from the following
detailed description of the invention when taken in conjunction
with the accompanying drawings.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0030] FIG. 1 is schematic view of a system for analyzing an
interaction between objects.
[0031] FIG. 2 is a multi-floor view of a facility employing a
system for analyzing an interaction between objects.
[0032] FIG. 3 is a floor plan view of a single floor in a facility
employing the system for analyzing an interaction between
objects.
[0033] FIG. 4 is a block diagram of a flow of information utilizing
a system for analyzing an interaction between objects.
[0034] FIG. 5 is a flow chart of a method for analyzing an
interaction between objects.
[0035] FIG. 6 is a flow chart of a method for analyzing an
interaction between objects.
[0036] FIG. 7 is a block diagram of a tag.
[0037] FIG. 8 is a plan view of an identification badge containing
a communication device.
DETAILED DESCRIPTION OF THE INVENTION
[0038] As shown in FIGS. 1-3, a system for tracking objects within
a facility is generally designated 50. The system 50 is capable of
analyzing an interaction between objects, individuals 58 and/or
devices 100. The system 50 preferably includes a plurality of
sensors 55, a plurality of bridges 56, a plurality of communication
devices 59, a plurality of tags 60, and at least one information
engine 65. The sensors 55 form a mesh network for receiving signals
from the communication devices 59 and tags 60. One example of the
components of the system 50 is disclosed in U.S. Pat. No.
7,197,326, for a Wireless Position Location And Tracking System,
which is hereby incorporated by reference in its entirety. A more
specific example of the sensors 55 is disclosed in U.S. Pat. No.
7,324,824, for a Plug-In Network Appliance, which is hereby
incorporated by reference in its entirety.
[0039] The system 50 is preferably employed at a facility 70 such
as a business office, factory, home, hospital and/or government
agency building. The system 50 is preferably utilized to track and
locate various objects positioned throughout the facility 70 in
order to analyze interactions between objects. The communication
devices 59 and tags 60 preferably continuously transmit signals on
a predetermined time cycle, and these signals are received by
sensors 55 positioned throughout the facility 70. Alternatively,
the tags 60 and communication devices 59 transmit signals in a
random, ad-hoc or dynamic manner, and these signals are received by
the sensors 55 positioned throughout the facility 70. The sensors
55 transmit the data from the communication devices 59 and tags 60
to a bridge 56 for transmission to the information engine 65. If a
sensor 55 is unable to transmit to a bridge 56, the sensor 55 may
transmit to another sensor 55 in a mesh network for eventual
transmission to a bridge 56. In a preferred embodiment, a
transmission may be sent from a transmission distance of six
sensors 55 from a bridge 56. Alternatively, a transmission is sent
from a transmission distance ranging from ten to twenty sensors 55
from a bridge 56. The information engine 65 preferably continuously
receives transmissions from the mesh network formed by the sensors
55 via the bridges 56 concerning the movement of persons 58 bearing
a communication device 59 and/or devices 100 bearing a tag 60
within the facility 70. The information engine 65 processes the
transmissions from the sensors 55 and calculates a real-time
position for each of the objects, persons 58 bearing a
communication device 59 or devices 100 bearing a tag 60, within the
facility 70. The real-time location information for each of the
objects is preferably displayed on an image of a floor plan of the
facility 70, or if the facility 70 has multiple floors, then on the
floor plan images of the floors of the facility 70. The floor plan
image may be used with a graphical user interface of a computer,
personal digital assistant, or the like so that an individual of
the facility 70 is able to quickly locate objects 100 within the
facility 70.
[0040] As shown in FIG. 1, the system 50 utilizes sensors 55 to
monitor and identify the real-time position of non-stationary
objects bearing or integrated with communication devices 59. The
sensors 55a-f preferably wirelessly communicate with each other
(shown as double arrow lines) and with an information engine 65
through a wired connection 66 via at least one bridge 56, such as
disclosed in the above-mentioned U.S. Pat. No. 7,324,824 for a
Plug-In Network Appliance. The communication devices 59 and tags 60
transmit wireless signals 57 which are received by the sensors
55a-e, which then transmit signals to bridges 56 for eventual
transmission to the information engine 65. The information engine
65 is preferably located on-site at the facility 70. However, the
system 50 may also include an off-site information engine 65, not
shown.
[0041] In a preferred embodiment, each communication device 59 and
tag 60 preferably transmits a radio frequency signal of
approximately 2.48 GigaHertz ("GHz"). The communication format is
preferably IEEE Standard 802.15.4. Alternatively, each
communication device 59 and tag 60 transmits an infrared signal or
an ultrasound signal. The transmission range is preferably between
1 and 3 meters. The tags 60 may be constructed with an asset theft
protection system such as disclosed in Baranowski et al., U.S. Pat.
No. 7,443,297 for a Wireless Tracking System And Method With
Optical Tag Removal Detection, which is hereby incorporated by
reference in its entirety. The tags 60 and communication devices 59
may be designed to avoid multipath errors such as disclosed in
Nierenberg et al., U.S. Pat. No. 7,504,928 for a Wireless Tracking
System And Method Utilizing Tags With Variable Power Level
Transmissions, and Caliri et al., U.S. Patent Publication Number
2008/0012767 for a Wireless Tracking System And Method With
Multipath Error Mitigation, both of which are hereby incorporated
by reference in their entireties.
[0042] As shown in FIGS. 2-3, the facility 70 is depicted as a
hospital. The facility 70 has multiple floors 75a-c. Each floor
75a, 75b and 75c has multiple rooms 90a-i, with each room 90
accessible through a door 85. Positioned throughout the facility 70
are sensors 55a-o for obtaining readings from communication devices
59 and tags 60 attached to people or devices. A bridge 56 is also
shown for receiving transmissions from the sensors 55 for
forwarding to the information engine 65. For example, as shown in
FIG. 2, the system 50 determines that individuals 58a, 58b and 58c
are located in a surgery room and are using device 100c, which is a
surgical kit. The information engine 65 analyzes the interaction by
monitoring the duration of the interaction, the devices 100
utilized, the location of the interaction (surgery), the previous
location of the individuals 58 (possibly a surgical prep room) and
additional factors. In another example, as shown in FIG. 3, the
system 50 determines that individuals 58a, 58b and 58c are located
in a patient's room and are using device with an attached tag 60c,
which is a patient monitoring device. In this example, individual
58a is a patient, individual 58b is a physician, and individual 58c
is a nurse. The information engine 65 analyzes the interaction by
monitoring the duration of the interaction, the devices 100
utilized, the location of the interaction (patient's room), the
previous location of the individuals 58 and additional factors. The
information engine 65 uses this data to generate billing
information for the patient.
[0043] FIG. 4 illustrates a preferred architecture of the system
50. For description purposes, the information providers are set
forth on one side of the network and the operations is set forth on
the other side of the network. However, those skilled in the
pertinent art will recognize that the illustrated architecture of
the system 50 is not meant to limit any physical relationship
between information providers and operations. In fact, an
individual 58 could be tracked while accessing information from a
device 100 such as a computer 66 in operations. The information
providers include individuals 58 that wear communication devices
59, equipment 100a bearing tags 60, sterilizable equipment 100b
bearing sterilizable tags 60, and the like. A description of
sterilizable tags 60 is found in Caliri et al., U.S. patent
application Ser. No. 12/325,030 for Wireless Tracking System And
Method With Extreme Temperature Resistant Tag, which is hereby
incorporated by reference in its entirety. A bridge 56 acts as an
intermediary between the information providers and operations. The
bridge 56 communicates information to the information engine 65
which analyzes the information to determine an interaction between
objects for access through an enterprise local area network for
display on computers 66 or other graphical user interface
devices.
[0044] A method 1000 for analyzing an interaction between objects
within a facility is illustrated in FIG. 5. At block 1001, a first
wireless signal is transmitted from a communication device
associated with an object, in this case a first person. At block
1002, a second wireless signal is transmitted from the
communication device associated with the object, in this case a
second person. At block 1003, the first and second wireless signals
are received at at least one of a plurality of sensors positioned
within a facility. At block 1004, the signals are forwarded to an
information engine. At block 1005, the information engine
determines that an interaction is occurring between the persons. At
block 1006, the information engine determines a business
relationship between the persons based on multiple factors. As used
herein, a business relationship involves more than just a
commercial transaction between individuals, and could be an
interaction between colleagues, an interactions between patients in
a hospital, an interactions between employers during non-business
hours, and the like. The multiple factors include a position
location of the interaction, a duration of the interaction, a
previous location of the first person prior to the interaction, and
information for a mobile object within a predetermined distance of
the location of the interaction. At block 1007, the interaction and
business relationship information is communicated to a graphical
user interface.
[0045] Another method 2000 for analyzing an interaction between
objects within a facility is illustrated in FIG. 6. At block 2001,
a first person is tracked within a hospital using a mesh network
that receives signals intermittingly transmitted from a
communication device 59 associated with the first person. At block
2002, a second person is tracked within a hospital using a mesh
network that receives signals intermittingly transmitted from a
communication device 59 associated with the second person. At block
2003, a device is tracked within a hospital using a mesh network
that receives signals intermittingly transmitted from a tag 60
associated with the device. At block 2004, the signals are
forwarded to an information engine. At block 2005, the information
engine determines that an interaction is occurring between the
persons and device. At block 2006, the information engine through
the mesh network monitors the interaction. At block 2007, the
interaction information is communicated to a graphical user
interface.
[0046] A tag 60 utilized with a device 100 is illustrated in FIG.
7. The tag 60 preferably includes a microcontroller 101, a
transceiver 103, a power supply 104 and a sensor 106.
Alternatively, the tag 60 includes a motion sensor 105. The
transmissions are transmitted through transceiver 103. A power
supply 104 provides power to the tag 60. All of the components are
preferably contained within a housing 107. A communication device
59 preferably has the same components and structure of the tag 60
illustrated in FIG. 7.
[0047] As shown in FIG. 8, an identification badge 141 is
preferably utilized as a support for a communication device 59 for
a person 58. Alternatively, the identification badge 141 is the
communication device 59.
[0048] From the foregoing it is believed that those skilled in the
pertinent art will recognize the meritorious advancement of this
invention and will readily understand that while the present
invention has been described in association with a preferred
embodiment thereof, and other embodiments illustrated in the
accompanying drawings, numerous changes modification and
substitutions of equivalents may be made therein without departing
from the spirit and scope of this invention which is intended to be
unlimited by the foregoing except as may appear in the following
appended claim. Therefore, the embodiments of the invention in
which an exclusive property or privilege is claimed are defined in
the following appended claims.
* * * * *