U.S. patent application number 15/190310 was filed with the patent office on 2017-12-28 for retrofit sensor module for a protective head top.
The applicant listed for this patent is 3M INNOVATIVE PROPERTIES COMPANY. Invention is credited to Steven T. Awiszus, Marc A. Egeland, Charles P. Jents, Benjamin A. Johnson, Kiran S. Kanukurthy, James E. Nash, Milo G. Oien-Rochat.
Application Number | 20170367426 15/190310 |
Document ID | / |
Family ID | 59270171 |
Filed Date | 2017-12-28 |
United States Patent
Application |
20170367426 |
Kind Code |
A1 |
Egeland; Marc A. ; et
al. |
December 28, 2017 |
RETROFIT SENSOR MODULE FOR A PROTECTIVE HEAD TOP
Abstract
The present disclosure includes a retrofit sensor module for use
with a protective head top with a helmet and a visor. The sensor
module includes a sensor housing and an attachment mechanism. The
sensor housing encloses a head presence sensor to sense when the
protective head top is being worn. The sensor housing also encloses
a position sensor to sense the position of the visor relative to
the helmet. The retrofit sensor module further comprises an
attachment mechanism secured to the housing. The attachment
mechanism mates with a first hinge component of a hinge assembly in
the protective head top to removably install the sensor module into
the protective head top, wherein the hinge assembly allows the
visor to move relative to the helmet.
Inventors: |
Egeland; Marc A.;
(Minneapolis, MN) ; Awiszus; Steven T.; (Woodbury,
MN) ; Jents; Charles P.; (Woodbury, MN) ;
Johnson; Benjamin A.; (Woodbury, MN) ; Kanukurthy;
Kiran S.; (Cottage Grove, MN) ; Nash; James E.;
(Bloomington, MN) ; Oien-Rochat; Milo G.;
(Minneapolis, MN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
3M INNOVATIVE PROPERTIES COMPANY |
St. Paul |
MN |
US |
|
|
Family ID: |
59270171 |
Appl. No.: |
15/190310 |
Filed: |
June 23, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A42B 3/046 20130101;
A42B 3/0433 20130101; H04W 4/80 20180201; A62B 18/082 20130101;
A42B 3/0466 20130101; A42B 3/225 20130101; A62B 9/006 20130101 |
International
Class: |
A42B 3/04 20060101
A42B003/04; A42B 3/22 20060101 A42B003/22; H04W 4/00 20090101
H04W004/00 |
Claims
1. A retrofit sensor module for use with a protective head top with
a helmet and a visor, the sensor module comprising: a sensor
housing, the sensor housing enclosing: a head presence sensor to
sense when the protective head top is being worn; and a position
sensor to sense the position of the visor relative to the helmet;
an attachment mechanism secured to the housing, wherein the
attachment mechanism mates with a first hinge component of a hinge
assembly in the protective head top to removably install the sensor
module into the protective head top, wherein the hinge assembly
allows the visor to move relative to the helmet.
2. The sensor module of claim 1, wherein the sensor housing further
encloses a battery.
3. The sensor module of claim 1, wherein the sensor housing further
encloses a temperature sensor to sense ambient temperature in the
interior of the protective head top.
4. The sensor module of claim 1, wherein the sensor housing further
encloses an accelerometer to sense movement of the head of an
individual wearing the head top.
5. The sensor module of claim 1, wherein the sensor housing further
encloses an audio transducer.
6. The sensor module of claim 1, further comprising a user
interface, wherein the user interface comprises at least one
LED.
7. The sensor module of claim 1, wherein the attachment mechanism
replaces a second hinge component of the hinge assembly.
8. The sensor module of claim 1, wherein the sensor module does not
replace any components of the hinge assembly when installed in the
protective head top.
9. The sensor module of claim 1, wherein the sensor module can be
installed without using any tools.
10. The sensor module of claim 1, wherein the sensor module fits in
the interior of the visor of the protective head top when the
sensor module is installed in the protective head top and when the
visor is in a down position.
11. The sensor module of claim 1, wherein the sensor module does
not impair the performance of the hinge assembly when it is
installed in the protective head top.
12. The sensor module of claim 1, wherein the attachment mechanism
is removably secured to the sensor housing.
13. The sensor module of claim 1, wherein the attachment mechanism
is an integral part of or permanently secured to the sensor
housing.
14. The sensor module of claim 1, wherein the battery can be
replaced without the use of any tools while the sensor module is
installed in the protective head top.
15. The sensor module of claim 1, wherein the sensor module has an
Ingress Protection (IP) rating.
16. The sensor module of claim 1, wherein the sensor housing
further comprises a Bluetooth communication component.
17. The sensor module of claim 1, wherein the head presence sensor
comprises an infrared sensor.
18. A kit comprising the sensor module of claim 16 and a personal
communication hub, wherein the sensor module communicates with the
personal communication hub using Bluetooth.
19. A kit comprising the sensor module of claim 1 and the
protective head top.
Description
TECHNICAL FIELD
[0001] The present disclosure relates to the field of personal
protective equipment and a sensor module for retrofitting personal
protective equipment. More specifically, the present disclosure
relates to a retrofit sensor module for a protective head top.
BACKGROUND
[0002] When working in areas where there is known to be, or there
is a potential of there being, dusts, fumes, gases or other
contaminants that are potentially hazardous or harmful to health,
it is usual for a worker to use a respirator or a clean air supply
source. While a large variety of respiratory devices are available,
some commonly used devices include powered air purifying
respirators (PAPR) or a self-contained breathing apparatus (SCBA).
A PAPR typically includes a blower system comprising a fan powered
by an electric motor for delivering a forced flow of air through a
tube to a head top worn by a user. A PAPR typically includes a
device (i.e., turbo) that draws ambient air through a filter,
forces the air through a breathing tube and into a helmet or head
top to provide filtered air to a user's breathing zone, around
their nose or mouth. An SCBA provides clean air from a compressed
air tank through a tube or hose to the interior of a head top worn
by a user.
[0003] In many instances, it is important for the user to be
confident that their PPE is working correctly. Additionally, safety
managers at work locations requiring the use of PPE want to be able
to confirm that their employees are using the correct PPE, and that
the PPE is being used as intended.
SUMMARY
[0004] The present invention provides a retrofit sensor module that
can be added to an existing protective head top. A retrofit sensor
module consistent with the present disclosure faces the challenges
of being easy for the user to install, use and remove on a regular
basis, potentially daily basis, without tools or training. These
factors therefore required an attachment mechanism that is simple
for quick access, yet durable enough to withstand impacts (the
device may not be dislodged during a head top impact or during use
for any reason), and located such that the device can accomplish
all required sensing and information gathering.
[0005] The retrofit sensor module can include a variety of
features. In at least one embodiment, the retrofit sensor module
for use with a protective head top including a visor and a helmet
comprises a sensor housing and an attachment mechanism. The sensor
housing encloses a head presence sensor to sense when the
protective head top is being worn. The sensor housing also encloses
a position sensor to sense the position of the visor relative to
the helmet. The retrofit sensor module further comprises an
attachment mechanism secured to the housing. The attachment
mechanism mates with a first hinge component of a hinge assembly in
the protective head top to removably install the sensor module into
the protective head top, wherein the hinge assembly allows the
visor to move relative to the helmet.
[0006] In some instances, the sensor housing further encloses a
battery.
[0007] In some instances, the sensor housing further encloses a
temperature sensor to sense ambient temperature in the interior of
the protective head top.
[0008] In some instances, the sensor housing further encloses an
accelerometer to sense movement of the head of an individual
wearing the head top.
[0009] In some instances, the sensor housing further encloses an
audio transducer.
[0010] In some instances, the user interface comprises at least one
light emitting diode (LED).
[0011] In some instances, the attachment mechanism replaces a
second hinge component of the hinge assembly.
[0012] In some instances, the sensor module does not replace any
components of the hinge assembly when installed in the protective
head top.
[0013] In some instances, the sensor module can be installed
without using any tools.
[0014] In some instances, the sensor module fits in the interior of
the visor of the protective head top when the sensor module is
installed in the protective head top and when the visor is in a
down position.
[0015] In some instances, the sensor module does not impair the
performance of the hinge assembly when it is installed in the
protective head top.
[0016] In some instances, the attachment mechanism is removably
secured to the sensor housing.
[0017] In some instances, the attachment mechanism is an integral
part of or permanently secured to the sensor housing.
[0018] In some instances, the battery can be replaced without the
use of any tools while the sensor module is installed in the
protective head top.
[0019] In some instances, the sensor module has an Ingress
Protection (IP) rating.
[0020] In some instances, the sensor housing further comprises a
Bluetooth communication component.
[0021] The sensor module of claim 1, wherein the head presence
sensor comprises an infrared sensor.
[0022] The present disclosure further includes a kit comprising the
sensor module as described herein and a personal communication hub,
wherein the sensor module communicates with the personal
communication hub using Bluetooth.
[0023] The present disclosure further includes a kit comprising the
sensor module as described herein and the protective head top.
[0024] The present disclosure provides many advantages over the
prior art. For example, the retrofit sensor module can allow users
or owners of protective head tops to efficiently upgrade their head
top to detect when the head top visor is open. Further, in some
instances, the retrofit sensor module can be installed in the head
top without the use of tools.
[0025] The present disclosure provides a way to confirm that a user
is wearing a protective head top in some instances through the head
detection sensor. This information allows managers of safety
programs to confirm that users of protective head tops are
complying with requirements to wear the protective head tops.
[0026] The present disclosure provides the ability to determine
what temperature the worker is exposed to within the interior of
the head top. This allows for the determination that a worker may
be overly hot, that the worker may be experiencing fatigue due to
temperature, or even that a blower connected to the head top is not
working properly.
[0027] The present disclosure provides a way to retrospectively
determine whether a visor for a protective head top was in an open
position or in a closed position at the time of an event or
injury.
[0028] The present disclosure can provide a solution that is
durable in a work environment based on an Ingress Protection (IP
rating).
BRIEF DESCRIPTION OF DRAWINGS
[0029] The invention may be more completely understood in
consideration of the following detailed description of various
embodiments of the invention in connection with the accompanying
drawings, in which:
[0030] FIG. 1 is a system diagram of a protective head top, a
blower and a communication hub.
[0031] FIG. 2 a perspective view of a retrofit sensor module.
[0032] FIG. 3 is a system diagram of the electronic components in a
retrofit sensor module.
[0033] FIGS. 4a and 4b are exploded views of a retrofit sensor
module.
[0034] FIG. 5 is a first side of a retrofit sensor module.
[0035] FIG. 6 is a second side of a retrofit sensor module.
[0036] FIG. 7a is an enlarged view of a hinge assembly in a
protective head top.
[0037] FIG. 7b is an exemplary hinge assembly for a protective head
top.
[0038] FIG. 8 shows a retrofit sensor module mated to hinge
assembly components.
[0039] FIGS. 9a and 9b shows a feature on the retrofit sensor
module that matches a feature on the rear side of the pivot socket
cam.
[0040] FIGS. 10a-10c show the retrofit sensor module installed in a
protective head top.
[0041] FIG. 11 shows a retrofit sensor module superimposed onto its
installation location in a protective head top.
[0042] FIG. 12 shows an alternate embodiment for a retrofit sensor
module.
[0043] It is to be understood that the embodiments may be utilized
and structural changes may be made without departing from the scope
of the invention. The figures are not necessarily to scale. Like
numbers used in the figures refer to like components. However, it
will be understood that the use of a number to refer to a component
in a given figure is not intended to limit the component in another
figure labeled with the same number.
DETAILED DESCRIPTION
[0044] FIG. 1 is a system 100 diagram of a protective head top 110,
a blower 120 and a communication hub 130. Communication hub 130 can
communicate with communication modules in blower 120 or in a
retrofit sensor module, with beacons or other sensors that may be
located in the environment, and with a cloud network 140, which can
provide information to a user computing device 150, such as a
mobile device, tablet or computer. Protective head top 110 includes
a visor 112 that is sized to fit over at least a user's nose and
mouth. Visor 112 includes lens 116 which is secured to helmet 118
by the frame assembly 114. Hinge assemblies 113 connect frame
assembly 114 to helmet 118 on each side of frame assembly 114.
Hinge assemblies 113 allow visor 116 to rotate to an open or closed
position relative to helmet 118. Helmet 118 may also be referred to
as a shell, and the terms are used interchangeably herein.
[0045] As described herein, a retrofit sensor module can be
installed into the protective head top such that an attachment
mechanism of the retrofit sensor module mates with a component of
hinge 113. In some instances the retrofit sensor module may replace
a component of hinge 113. Retrofit sensor module may include a
variety of sensors and other components, such as a position sensor.
When retrofit sensor module is installed in head top 110, the
position sensor senses the position of visor 112 relative to helmet
118 to determine if the visor is in an open position or in a closed
position. In some instances, a position sensor may detect whether
visor 112 is partially open, and if so, what measure (e.g., percent
or degree) it is open.
[0046] Head top 110 is connected to blower 120 by hose 119. Blower
120 can be any type of air supply source, such as a blower assembly
for a powered air purifying respirator (PAPR), an air tank for a
self-contained breathing apparatus (SCBA) or any other device that
provides air to head top 110. In FIG. 1, blower 120 is a blower
assembly for a PAPR. A PAPR is commonly used by individuals working
in areas where there is known to be, or there is a potential of
there being dusts, fumes or gases that are potentially harmful or
hazardous to health. A PAPR typically includes blower assembly,
including a fan driven by an electric motor for delivering a forced
flow of air to the respirator user. The air is passed from the PAPR
blower assembly through hose 119 to the interior of head top
110.
[0047] Head top 110, and specifically the helmet 118 of head top
110 may be supported on a user's head by a suspension (not
shown).
[0048] A retrofit sensor module may include a communication module
that allows the retrofit sensor to communicate information with
communication hub 130. Communication hub 130 includes a processor,
a communication module and a power supply. The communication module
of communication hub 130 or of a retrofit sensor module can include
any desired communication capability, such as: RFID (including
NFC), Bluetooth, including any generations of Bluetooth technology,
and WiFi communication capabilities. Communication module of
communication hub 130 or of a retrofit sensor module can also
include any type of wireless communication capabilities, such as
radio frequency or Zigbee communication.
[0049] Communication hub 130 may include a user interface, such as
a display, lights, buttons, keys (such as arrow or other indicator
keys), and may be able to provide alerts to the user in a variety
of ways, such as by audibly or visibly generating an alarm or
vibrating. In some instances, the user interface of communication
hub 130 may be used to control electronic settings for the head top
110 or the blower 120 to allow a user easier access to setting
changes, particularly when the blower 120 is worn in a location on
the lower back where it can be difficult for the user to reach.
[0050] Communication hub 130 can be portable such that it can be
carried or worn by a user. Communication hub 130 can also be
personal, such that it is used by an individual and communicates
with personal protective equipment (PPE) assigned to that
individual. In FIG. 1, communication hub 130 is secured to a user
using a strap 134. However, communication hub may be carried by a
user or secured to a user in other ways, such as being secured to
PPE being worn by the user, to other garments being worn to a user,
being attached to a belt, band, buckle, clip or other attachment
mechanism as will be apparent to one of skill in the art upon
reading the present disclosure.
[0051] Communication hub 130 can receive information from and
communicate information to head top 110 and blower 120.
Communication hub 130 sends information to and receives information
from a cloud database 140. Such information may include status
information about head top 110 and blower 120, information about
the movement, temperature, or other pieces of data related to the
individual wearing head top 110 and blower 120, and information
from other sensors or beacons that may be located in the
environment or in communication proximity of head top 110 and
blower 120.
[0052] A user can access, view and modify information stored in
cloud database 140 through a web interface on user computing device
150, such as a personal computer, mobile device or tablet.
[0053] FIG. 2 a perspective view of a retrofit sensor module 200.
Retrofit sensor module includes a pivot socket cam 210 (opposite
boss 270). Pivot socket cam 210 and boss 270 serve as attachment
mechanisms to allow retrofit sensor module 200 to be retained in a
protective head top when installed in the protective head top.
Pivot socket cam 210 and boss 270 also reproduce the cam action of
a component of a hinge assembly to allow the visor to rotate or
pivot relative to a helmet in a protective head top in the same
manner after a retrofit sensor module 200 is installed as before it
was installed.
[0054] Retrofit sensor module 200 can have a housing comprised of
two sides, housing side 220 and housing side 240. These two
portions of the housing (housing side 220 and housing side 240)
allow the pieces of housing to be separately molded and later
sealed together after a populated printed circuit board is
installed in the housing. Multiple portions of a housing can be
permanently joined through processes such as use of adhesive, laser
welding, ultrasonic welding or any other method of joining or
securing components to each other. The housing may also be
manufactured through a 3D-printing process. Slotted coin slot cover
260 covers the opening where a small battery, such as a coin cell
lithium ion battery can be inserted into the interior of the
housing of retrofit sensor module 200. The battery can provide
power to the electronic components within retrofit sensor module
200. Slotted coin cell cover 260 can be sealed to housing side 220
by an O-ring or another gasketing method to prevent moisture or
dust entering the interior of the housing. Slotted coin cell cover
260 includes slot 262 which provides a user a way to rotate and
open the slotted coin cell cover 260 relative to housing side 220
using a coin-shaped battery (such as the battery to be enclosed in
the housing or recently removed from the housing) or similar
coin-shaped object.
[0055] FIG. 3 is a system diagram of the electronic components in a
retrofit sensor module 310. FIG. 3 also shows how retrofit sensor
module 310 may electronically interface with other components in a
safety system. Retrofit sensor module 310 includes position sensor
311, head presence sensor 312, accelerometer 313, temperature
sensor 314, communication module 315 and audio transducer 316.
Position sensor 311 detects the position of the visor relative to
the helmet of the protective head top. In some instances, position
sensor 311 may detect whether visor 112 is partially open, and if
so, what measure (e.g., percent or degree) it is open. As an
example, the position sensor 311 may be a gyroscope that computes
angular yaw, pitch, and/or roll (in degrees or radians) of the
visor relative to the helmet. In another example, the position
sensor 311 may be a magnetometer that measures the change relative
to a magnet installed in a component of the hinge assembly. A
percent may be estimated respecting how open a visor is in relation
to the helmet by determining the magnetic field strength or flux
perceived by the position sensor 311. "Partially open" visor
information can be used to denote that the user may be receiving
eye and face protection for hazards while still receiving a
reasonable amount of respiratory protection. This "partially open"
visor state, if kept to short durations, can assist the user in
face to face communications with other workers. Position sensor 111
can be a variety of types of sensors, for example, an
accelerometer, gyro, magnet, switch, potentiometer, digital
position sensor or air pressure sensor. Position sensor 111 can
also be a combination of any of the sensors listed above, or any
other types of sensors that can be used to detected the position of
the visor relative to the helmet.
[0056] Head presence sensor 312 can detect whether the protective
head top is being worn by a user at any given point in time. In one
instance, head presence sensor 312 may be an infrared sensor. The
location of the retrofit sensor module when installed in a
protective head top near the suspension that supports the head top
on a user's head allows an infrared sensor to be positioned to
detect whether a user is wearing the protective head top. Other
types of sensors that may be used to detect whether an individual
is wearing the protective head top include a capacitive sensor, a
reed switch, carbon dioxide sensor, passive optical sensor, thermal
sensor or an electro-mechanical switch.
[0057] Accelerometer 313 can detect the movement of a user's head
when the protective head top is being worn. Such motion detection
can allow for identification of activity that may injure the
worker. Additionally, if the protective head top with a retrofit
sensor module is not worn, no motion will be detected by
accelerometer 313, allowing the accelerometer 313 to be used to
confirm when the head top is not being worn. Accelerometer 313 can
be used to detect occurrence of an impact or a high acceleration
fall to determine additional detail when dangerous events
occur.
[0058] Temperature sensor 314 senses the ambient temperature in the
interior of a protective head top when retrofit sensor module 310
is installed in a protective head top. Temperature sensor 314 may
be used to gather information such as whether the visor is open in
a high temperature environment, whether the individual wearing the
protective head top is being exposed to a high degree of heat and
whether the blower 320 is not circulated air within the interior of
the protective head top.
[0059] Audio transducer 316 can analyze the noise level in an
environment, such as the interior of the protective head top or the
area just external to the protective head top and near the user's
ear, especially in the absence of a user wearing hearing
protection, to determine if an environment is safe or dangerous to
a user's hearing. In some embodiments, audio transducer 316 may be
located in a portion of the housing of the retrofit sensor module
that is situated near a user's ear and exposed to an exterior
environment to allow sensing of environmental noise levels and
exposure. In some instances, audio transducer 316 may determine the
origination location or direction of noise and alert the user to
approaching objects or people.
[0060] Communications module 315 allows retrofit sensor module to
communicate with other electronic devices, such as communication
hub 330. A communication module may include a variety of
communication capabilities, such as radio frequency identification
(RFID) (including NFC), Bluetooth, including any generations of
Bluetooth, such as Bluetooth low energy (BLE), any type of wireless
communication, such as WiFi, Zigbee, radio frequency or other types
of communication methods as will be apparent to one of skill in the
art up one reading the present disclosure. Communication module 315
can electronically interface with sensors, such as position sensor
311, head presence sensor 312, temperature sensor 313,
accelerometer 314 or audio transducer 316 such that it can transmit
information from these sensors to other electronic devices,
including communication hub 330.
[0061] Retrofit sensor module 310 may include other types of
sensors or electronic components, such as a verbal communication
module, a power source such as a battery and a processing
component, a USB or other connection for recharging batteries or
removing information and other electro-mechanical connections.
[0062] Communication hub 330 includes a processor 331, a
communication module 332 and a power supply (not shown). The
communication module 332 of communication hub 330 can include any
desired communication capability, such as: RFID, Bluetooth,
including any generations of Bluetooth technology, and WiFi
communication capabilities. Communication hub 130 can also include
any type of wireless communication capabilities, such as radio
frequency or Zigbee communication.
[0063] Communication hub 330 power supply can provide power to both
the processor and communication module. A rechargeable battery,
such as a Lithium Ion battery, can provide a compact and long-life
source of power. Communication hub 330 may be adapted to have
electrical contacts exposed or accessible from the exterior of the
hub to allow recharging the communication hub 330.
[0064] Communication hub 130 processor 331 can receive, store and
process information. For example, communication module 332 in
communication hub 330 may receive information from a communication
module 315 in retrofit sensor module 310 or directly from the
position sensor 311 indicating the position of the visor, whether
the visor is open or closed, and at what time the visor position
changed. Processor 331 in communication hub 330 can store this
information and compare it with other information received. Other
information received may include, for example, information from a
user's computing device 350 environmental beacon or sensor (not
shown) and information from cloud database 340. Communication hub
330 can further store rules, such as threshold information both for
a length of time the visor is allowed to be in an open position
before an alert is generated, and the level or type of contaminants
that will trigger an alert. For example, when communication hub 330
receives information from an environmental beacon or sensor
indicating that there are no known hazards in the environment, the
threshold for the visor being in the open position may be infinite.
If a hazard is present in the environment, then the threshold would
be determined based upon the concern of the threat to the user.
Radiation, dangerous gases, or toxic fumes would all require
assignment of the threshold to be on the order of one second or
less.
[0065] Thresholds for other variables, such as for head top
interior temperature can be used to predict heat related illness
and more frequent hydration and/or rest periods can be recommended
to the user. Thresholds can be used to alert a user of a remaining
amount of predicted battery run time. As the battery nears its
remaining run time, the user can be notified/warned to complete
their current task and seek a fresh battery. When a threshold is
exceeded for a specific environmental hazard, an urgent alert can
be given to the user to evacuate the immediate area.
[0066] Thresholds can be adjusted and individualized for a user
based on factors such as the user's age, gender, or state of
health. Thresholds related to remaining battery life can be
adjusted based on anticipated time to don and doff PPE.
[0067] Blower 320 includes a motor and fan assembly that provides a
pressurized source of air to the head top. Additionally, blower 320
includes a processor 324 and a communication module 322. Processor
324 may interface with other components within blower 320. For
example, processor 324 may interface with the battery or power
source for blower 320 to determine how much battery life remains
for the particular battery at any given point in time. Processor
324 may also communicate with the motor controlling fan speed, to
determine how much air is being forced through the filter in blower
320, and therefore estimate remaining filter life. Communication
module 322 is in electrical communication with processor 324.
Communication module 322 may include any desired communication
capability, such as: RFID (including NFC), Bluetooth, including any
generations of Bluetooth technology, and WiFi communication
capabilities. Communication module 322 can also include any type of
wireless communication capabilities, such as radio frequency or
Zigbee communication. Communication module can communicate
wirelessly with communication hub 330. In some instances,
communication module may communicate with other devices, such as
cloud database 340 and user computing device 350, such as a
personal computer, mobile device or tablet.
[0068] FIGS. 4a and 4b are exploded views of a retrofit sensor
module 400, showing each a perspective view of one side of the
components in retrofit sensor module 400. Pivot socket cam 410 may
be manufactured as a single component and later attached to
retrofit sensor module housing 420, or may be manufactured as a
continuous component with retrofit sensor module housing 420. In
some configurations, pivot socket cam 410 serves as an attachment
mechanism to attach retrofit sensor module 400 to the protective
head top. Pivot socket cam 410 may be removably secured to the
sensor housing 420. Pivot socket cam 410 may be an integral part of
or permanently secured to the retrofit sensor module housing.
[0069] Pivot socket cam 410 has two sides, shown in FIGS. 4a and
4b, respectively. Pivot socket cam 410, in the embodiment shown,
replaces a component of the hinge assembly in a protective head
top. Specifically, the side of pivot socket cam 410 shown in FIG.
4b makes visible the detents that mate with a socket cam of the
protective head top hinge assembly. In some configurations, pivot
socket cam 410 may optionally include an annular (or other)
retaining feature, sometimes also referred to as a boss, on the
same side as the detents to increase security and better retain the
retrofit sensor module in its installed location in the protective
head top. In some other embodiments, the sensor module does not
replace any components of the hinge when installed in the
protective head top. One advantage of the present invention is that
the installation of the sensor module does not impair the
performance of the hinge when it is installed in the protective
head top.
[0070] The side of pivot socket cam shown in FIG. 4a includes a
small boss that seats into a molded pocket within the helmet.
Bosses may be any shape, such as a square, trapezoid, or any shape
used to mate to existing features of a protective helmet or
components of a hinge assembly. The feature provides a mechanical
interference that further prevents the retrofit sensor module from
inadvertently being dislodged from the protective head top,
especially in the instance the wearer of the helmet experiences a
top impact while wearing the helmet.
[0071] Retrofit sensor module housing side 420 includes several
ribs (visible in FIG. 4a) adding stability to the housing, slightly
spacing the back side of printed circuit board 430 from the
interior surface of retrofit housing side 420 to allow cooling of
the components mounted on the PCB.
[0072] Printed circuit board (PCB) 430 hosts the electronic
components in retrofit sensor module 400. While other methods of
integrating electronic packages into devices will be apparent to
one of skill in the art upon reading the present disclosure, use of
a PCB to mount and connect components is shown in this embodiment.
PCB may host a variety of components, including sensors,
communication modules, processors and other components. PCB has
mounted on it a set of springs to create an electrical contact with
coin cell battery 435. Coin cell battery 435 is not secured to the
PCB in the embodiment shown in FIGS. 4a and 4b, but rather in
contact with it. This allows coin cell battery 435 to be replaced.
In some embodiments, coin cell battery 435 can be replaced without
tools when retrofit sensor module is installed in a protective head
top.
[0073] Retrofit sensor module housing side 440 can be manufactured
through a molding process and permanently attached to retrofit
sensor module housing 420 using processes such as adhesives and
ultrasonic welding. Retrofit sensor housing module side 440
includes opening 443 by which a coin cell battery 435 can be
accessed and replaced. Retrofit sensor housing module side 440
includes lip 442, which provides a resting location for O-ring 450.
O-ring 450 provides a tight seal between retrofit sensor housing
module 442 and slotted coin slot cover 460. This tight seal, along
with other manufacturing and design choices allows the retrofit
sensor module to achieve various ingress protection (IP) ratings
defined by the IEC 60529 standard, managed by the American National
Standards Institute (ANSI). For example, in one embodiment, the
retrofit sensor module may have an IP rating of 67, indicative of
its respective solid protection and liquid protection ratings.
Lower or higher ratings may be used depending on the likely
environment for use for the retrofit sensor module and the
protective head top it is installed in.
[0074] FIG. 5 is a first side of a retrofit sensor module 500. This
view of retrofit sensor module 500 shows a retrofit sensor module
housing side 520 and pivot socket cam 510. Pivot socket cam 510
includes detents that mate with a socket cam of the protective head
top hinge assembly.
[0075] FIG. 6 is a second side of a retrofit sensor module 600.
This view of retrofit sensor module 600 shows a retrofit sensor
module housing side 640, the back side of pivot socket cam 610,
which includes boss 616, slotted coin cell cover 660 that fits into
coin cell opening 642. Slotted coin cell cover includes slot 662
which allows coin cell cover to be removed from retrofit sensor
module housing side 640 with only the use of a coin cell battery or
other coin-shaped object or a fingernail and no other tools.
[0076] FIG. 7a is an enlarged view of a hinge assembly 710 in a
protective head top 700. FIG. 7b is an exemplary hinge assembly for
a protective head top.
[0077] While any number of protective head tops could be used
consistent with the scope of the present disclosure, some exemplary
head tops include the 3M M-Series Headgear Family, available for
purchase from 3M Company of St. Paul, Minn. This family of headgear
includes the M-100 Series Faceshields, the M-300 Series Hardhats
and the M-400 Series Helmets.
[0078] Hinge assembly 710 includes three main components: socket
cam 712, spring clip 714 and pivot socket cam 716. The hinge
assembly 710 functions in a manner such that as the visor 720 of
the protective head top 700 is opened, the socket cam 712 rotates
with the visor and unseats from the detents within the pivot socket
cam 716. Once the male features of the socket cam 712 find the next
series of detents in the pivot socket cam 716, the visor snaps into
that position. The spring clip 714 provides the force to hold the
socket cam features within the pivot socket cam 716 detents.
[0079] Hinge assembly 710 can be removed from protective head top
700 by first removing spring clip 714. Spring clip 714 can be
removed by squeezing the edge of the spring clip 714 toward the
pivot socket cam 716 and pulling the spring clip out from the
opening 730 in the rim of the protective head top. After the spring
clip 714 is removed, visor 720 and frame assembly along with socket
cam 712 can be pulled away from the opening in the side of
protective head top. Pivot socket cam 716 can then be slid out of
opening 730 in the rim of protective head top.
[0080] FIG. 8 shows a retrofit sensor module 800 mated to a hinge
assembly component. Specifically, retrofit sensor module 800
includes attachment mechanism 816, which serves as a replacement
for pivot socket cam 716 in hinge assembly 810. Attachment 816 can
replicate the pivot socket cam features as shown in FIG. 4b.
[0081] FIGS. 9a and 9b show a boss feature 906 on the retrofit
sensor module 900 that matches a boss feature 916 on the rear side
of the pivot socket cam 912. The boss feature on each of retrofit
sensor module 900 and socked cam pivot 912 seats into a molded
pocket within the helmet shell and provides a mechanical
interference that further prevents the part from being dislodged
from the helmet.
[0082] FIGS. 10a-10c show the retrofit sensor module 1100 installed
in a protective head top 1000. FIGS. 10a and 10b show front and
side views respectively of retrofit sensor module 1100 and
protective head top 1000. As can be seen from FIG. 10b, when
retrofit sensor module is installed in protective head top 1000,
the sensor module fits in the interior of the visor when the visor
is in a down position.
[0083] Retrofit sensor module 1100 can be installed in protective
head top 1000 without the use of any tools. To install retrofit
sensor module 1100, the hinge assembly must first be removed as
discussed with respect to FIGS. 7a and 7b. After the hinge assembly
is removed, the attachment mechanism portion of the retrofit sensor
module 1100 can be inserted into the opening in the frame of the
protective head top where the pivot socket cam once was. After the
retrofit sensor module 1100 is in position, the socket cam 1112 can
be reinserted through the opening in the frame of the protective
head top to mate with the attachment mechanism portion of the
retrofit sensor module 1100 that imitates that pivot socket cam.
The spring clip 1114 can then be reinserted to create force between
the retrofit sensor module 1100 and the socket cam.
[0084] In some instances, where the position sensor in the retrofit
sensor module is a magnetometer, a magnet may be inserted into,
attached to, or otherwise incorporated into the socket cam. This
allows the magnetometer to detect the motion of the visor relative
retrofit sensor module because the motion socket cam of the socket
cam relative to the retrofit sensor module is the same as or
comparable to the motion of the visor relative to the helmet of the
protective head top.
[0085] Other configurations for use of a magnetometer or a magnet
used for sensing the position of the visor are included in the
scope of the present disclosure. The magnet may be physically
installed in a variety of was as will be apparent to one of skill
in the art upon reading the present disclosure. Other locations and
methods of magnet attachment will be apparent to one of skill in
the art upon reading the present disclosure.
[0086] In some instances, the retrofit sensor module can be sold as
a kit along with a communication hub. The retrofit sensor module
may be designed to communicate with the sensor hub via Bluetooth.
In some instances, the retrofit sensor module be require minimal or
no calibration by the user. In some instances, that kit may further
include a replacement socket cam that includes a magnet for
purposes of allowing a magnetometer in the retrofit sensor module
to detect the position of the visor relative to the helmet. In some
instances, the kit may further include a protective head top.
[0087] FIG. 11 shows a retrofit sensor module 1110 superimposed
onto its installation location in a protective head top 1100.
[0088] FIG. 12 shows an alternate embodiment for a retrofit sensor
module 1200. In the illustrated embodiment, the retrofit sensor
module includes clip 1215 to serve as an attachment mechanism, to
attach the retrofit sensor module to the socket cam or to another
component of a hinge assembly. Clip 1215 is designed so that its
legs snap around the cam socket and its feet seat into the pivot
sockets.
[0089] Many other embodiments and methods for attaching retrofit
sensor module to a hinge assembly of a protective head top will be
apparent to one of skill in the art upon reading the present
disclosure.
[0090] Other variations on the retrofit sensor module are also
within the scope of this disclosure. For example, in some instances
the sensor module includes a user interface, and the user interface
comprises at least one LED. A user interface may include other
features that allow it to communicate with the user, such as a
power button or switch, a speaker to transmit audio messages, a
vibration ability for the purpose of alarming, a display or a
light.
[0091] It will be appreciated that numerous and varied other
arrangements may be readily devised by those skilled in the art
without departing from the spirit and scope of the invention as
claimed.
[0092] It will be appreciated that based on the above description,
aspects of the disclosure include methods and systems for
determining time of use (wear time) of articles, such as PPE
articles, by determining if they satisfy at least one
criterion.
[0093] Although the methods and systems of the present disclosure
have been described with reference to specific exemplary
embodiments, those of ordinary skill in the art will readily
appreciate that changes and modifications may be made thereto
without departing from the spirit and scope of the present
disclosure.
[0094] In the present detailed description of the preferred
embodiments, reference is made to the accompanying drawings, which
illustrate specific embodiments in which the invention may be
practiced. The illustrated embodiments are not intended to be
exhaustive of all embodiments according to the invention. It is to
be understood that other embodiments may be utilized and structural
or logical changes may be made without departing from the scope of
the present invention. The following detailed description,
therefore, is not to be taken in a limiting sense, and the scope of
the present invention is defined by the appended claims.
[0095] Unless otherwise indicated, all numbers expressing feature
sizes, amounts, and physical properties used in the specification
and claims are to be understood as being modified in all instances
by the term "about." Accordingly, unless indicated to the contrary,
the numerical parameters set forth in the foregoing specification
and attached claims are approximations that can vary depending upon
the desired properties sought to be obtained by those skilled in
the art utilizing the teachings disclosed herein.
[0096] As used in this specification and the appended claims, the
singular forms "a," "an," and "the" encompass embodiments having
plural referents, unless the content clearly dictates otherwise. As
used in this specification and the appended claims, the term "or"
is generally employed in its sense including "and/or" unless the
content clearly dictates otherwise.
[0097] Spatially related terms, including but not limited to,
"proximate," "distal," "lower," "upper," "beneath," "below,"
"above," and "on top," if used herein, are utilized for ease of
description to describe spatial relationships of an element(s) to
another. Such spatially related terms encompass different
orientations of the device in use or operation in addition to the
particular orientations depicted in the figures and described
herein. For example, if an object depicted in the figures is turned
over or flipped over, portions previously described as below or
beneath other elements would then be above or on top of those other
elements.
[0098] As used herein, when an element, component, or layer for
example is described as forming a "coincident interface" with, or
being "on," "connected to," "coupled with," "stacked on" or "in
contact with" another element, component, or layer, it can be
directly on, directly connected to, directly coupled with, directly
stacked on, in direct contact with, or intervening elements,
components or layers may be on, connected, coupled or in contact
with the particular element, component, or layer, for example. When
an element, component, or layer for example is referred to as being
"directly on," "directly connected to," "directly coupled with," or
"directly in contact with" another element, there are no
intervening elements, components or layers for example. The
techniques of this disclosure may be implemented in a wide variety
of computer devices, such as servers, laptop computers, desktop
computers, notebook computers, tablet computers, hand-held
computers, smart phones, and the like. Any components, modules or
units have been described to emphasize functional aspects and do
not necessarily require realization by different hardware units.
The techniques described herein may also be implemented in
hardware, software, firmware, or any combination thereof. Any
features described as modules, units or components may be
implemented together in an integrated logic device or separately as
discrete but interoperable logic devices. In some cases, various
features may be implemented as an integrated circuit device, such
as an integrated circuit chip or chipset. Additionally, although a
number of distinct modules have been described throughout this
description, many of which perform unique functions, all the
functions of all of the modules may be combined into a single
module, or even split into further additional modules. The modules
described herein are only exemplary and have been described as such
for better ease of understanding.
[0099] If implemented in software, the techniques may be realized
at least in part by a computer-readable medium comprising
instructions that, when executed in a processor, performs one or
more of the methods described above. The computer-readable medium
may comprise a tangible computer-readable storage medium and may
form part of a computer program product, which may include
packaging materials. The computer-readable storage medium may
comprise random access memory (RAM) such as synchronous dynamic
random access memory (SDRAM), read-only memory (ROM), non-volatile
random access memory (NVRAM), electrically erasable programmable
read-only memory (EEPROM), FLASH memory, magnetic or optical data
storage media, and the like. The computer-readable storage medium
may also comprise a non-volatile storage device, such as a
hard-disk, magnetic tape, a compact disk (CD), digital versatile
disk (DVD), Blu-ray disk, holographic data storage media, or other
non-volatile storage device.
[0100] The term "processor," as used herein may refer to any of the
foregoing structure or any other structure suitable for
implementation of the techniques described herein. In addition, in
some aspects, the functionality described herein may be provided
within dedicated software modules or hardware modules configured
for performing the techniques of this disclosure. Even if
implemented in software, the techniques may use hardware such as a
processor to execute the software, and a memory to store the
software. In any such cases, the computers described herein may
define a specific machine that is capable of executing the specific
functions described herein. Also, the techniques could be fully
implemented in one or more circuits or logic elements, which could
also be considered a processor.
* * * * *