Fall Protection Compliance System and Method
20250078641 ยท 2025-03-06
Inventors
Cpc classification
G08B21/0461
PHYSICS
A62B35/0075
HUMAN NECESSITIES
International classification
Abstract
A fall protection compliance system includes a fall limiting device connected to an anchor. The fall limiting device comprises a connection device and a sensor system associated with the connection device. The sensor system is configured to determine whether a connector is connected to the connection device and to transmit a signal based on detecting that the connector is connected to the connection device, where operation of a machine associated with the anchor is controlled based on the signal.
Claims
1. A system, comprising: a fall limiting device, the fall limiting device comprising: a connection device; and a sensor system associated with the connection device, wherein the sensor system is configured to determine whether an approved connector is connected to the connection device and to transmit a signal based on detecting that the approved connector is connected to the connection device, wherein operation of a machine associated with the anchor is controlled based on the signal; wherein the approved connector is determined to be approved based on time of flight of signals from a plurality of transmitters at known locations.
2. The system of claim 1, wherein the machine is prohibited from operating in the absence of the signal indicating that the connector is connected to the connection device.
3. The system of claim 1, wherein the approved connector is associated with a known location; wherein an estimated location is determined based on the signals from the plurality of transmitters; wherein the approved connector is determined to be approved based on the known location and the estimated location.
4. The system of claim 3, wherein the sensor system determines that the connection device is not connected to the approved connector when the known location is greater than a threshold distance from the estimated location.
5. The system of claim 1, wherein the signals from a plurality of transmitters are received from exactly three transmitters.
6. The system of claim 1, wherein the signals from a plurality of transmitters are received from exactly two transmitters.
7. The system of claim 1, wherein each of the plurality of transmitters periodically transmits a respective one of the signals from a plurality of transmitters.
8. The system of claim 3, wherein a particular one of the transmitters transmits its respective signal in response to a signal from the sensor system; wherein the estimated location is based on a two way time of flight between the sensor system and the particular transmitter.
9. The system of claim 1, wherein a signal from a particular one of the transmitters is encoded with data identifying the particular transmitter.
10. The system of claim 1, wherein a signal from a particular one of the transmitters is encoded with data identifying a location of the particular transmitter.
11. A method of determining whether a fall limiting device is connected to an approved connector, comprising: detecting that a connection device of the fall limiting device is connected to a connector; receiving a signal from a first transmitter associated with a first known location; receiving a signal from a second transmitter associated with a second known location; determining an estimated location of the connector based on the signal from the first transmitter and the signal from a second transmitter; determining whether the estimated location is within a predetermined distance from a known location of an approved connection; and outputting a control signal based on the determination of whether the estimated location is within the predetermined distance.
12. The method of claim 11, further comprising inhibiting operation of a machine when the estimated location is not within the predetermined distance of the known location the approved connection.
13. The method of claim 11, further comprising: receiving a signal from a third transmitter associated with a third known location; determining an estimated location of the connector further based on the signal from the third transmitter.
14. The method of claim 11, wherein the estimated location is determined based on signals from exactly three transmitters.
15. The method of claim 11, wherein the estimated location is determined based on signals from exactly two transmitters.
16. The method of claim 11, further comprising: periodically repeating said receiving a signal from a first transmitter; receiving a signal from a second transmitter; determining an estimated location; and determining whether the estimated location is within the predetermined distance.
17. The method of claim 11, further comprising: transmitting a polling signal from the fall limiting device; wherein the signal from the first transmitter and the signal from the second transmitter are received based on the polling signal.
18. The method of claim 11, wherein the signal from a the first transmitter is encoded with data identifying the first transmitter.
19. The method of claim 1, wherein the signal from a the first transmitter is encoded with data identifying a location of the first transmitter.
20. The method of claim 11, wherein the estimated location is determined based on a time of flight of the signal from the first transmitter and a time of flight of the signal from the second transmitter.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0051] Additional advantages and details of non-limiting embodiments or aspects are explained in greater detail below with reference to the exemplary embodiments that are illustrated in the accompanying schematic figures, in which:
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[0091] It should be appreciated by those skilled in the art that any block diagrams herein represent conceptual views of illustrative systems embodying the principles of the present subject matter. Similarly, it will be appreciated that any flow charts, flow diagrams, state transition diagrams, pseudo code, and the like represent various processes which may be substantially represented in computer-readable medium and executed by a computer or processor, whether such computer or processor is explicitly shown. While each of the figures illustrates a particular embodiment for purposes of illustrating a clear example, other embodiments may omit, add to, reorder, and/or modify any of the elements shown in the figures.
DETAILED DESCRIPTION
[0092] For purposes of the description hereinafter, the terms end, upper, lower, right, left, vertical, horizontal, top, bottom, lateral, longitudinal and derivatives thereof shall relate to the disclosure as it is oriented in the drawing figures. However, it is to be understood that the disclosure may assume various alternative variations and step sequences, except where expressly specified to the contrary.
[0093] All numbers and ranges used in the specification and claims are to be understood as being modified in all instances by the term about. By about is meant plus or minus twenty-five percent of the stated value, such as plus or minus ten percent of the stated value. However, this should not be considered as limiting to any analysis of the values under the doctrine of equivalents.
[0094] Unless otherwise indicated, all ranges or ratios disclosed herein are to be understood to encompass the beginning and ending values and any and all subranges or subratios subsumed therein. For example, a stated range or ratio of 1 to 10 should be considered to include any and all subranges or subratios between (and inclusive of) the minimum value of 1 and the maximum value of 10; that is, all subranges or subratios beginning with a minimum value of 1 or more and ending with a maximum value of 10 or less. The ranges and/or ratios disclosed herein represent the average values over the specified range and/or ratio.
[0095] The terms first, second, and the like are not intended to refer to any particular order or chronology, but refer to different conditions, properties, or elements.
[0096] The term at least is synonymous with greater than or equal to.
[0097] As used herein, at least one of is synonymous with one or more of. For example, the phrase at least one of A, B, and C means any one of A, B, or C, or any combination of any two or more of A, B, or C. For example, at least one of A, B, and C includes one or more of A alone; or one or more B alone; or one or more of C alone; or one or more of A and one or more of B; or one or more of A and one or more of C; or one or more of B and one or more of C; or one or more of all of A, B, and C.
[0098] As used herein, the terms parallel or substantially parallel mean a relative angle as between two objects (if extended to theoretical intersection), such as elongated objects and including reference lines, that is from 0 to 5, or from 0 to 3, or from 0 to 2, or from 0 to 1, or from 0 to 0.5, or from 0 to 0.25, or from 0 to 0.1, inclusive of the recited values.
[0099] As used herein, the terms perpendicular or substantially perpendicular mean a relative angle as between two objects at their real or theoretical intersection is from 85 to 90, or from 87 to 90, or from 88 to 90, or from 89 to 90, or from 89.5 to 90, or from 89.75 to 90, or from 89.9 to 90, inclusive of the recited values.
[0100] In the present document, the word exemplary is used herein to mean serving as an example, instance, or illustration. Any embodiment or implementation of the present subject matter described herein as exemplary is not necessarily to be construed as preferred or advantageous over other embodiments.
[0101] The terms comprises, comprising, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a setup, device, or method that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup, device, or method. In other words, one or more elements in a system or apparatus proceeded by comprises . . . a does not, without more constraints, preclude the existence of other elements or additional elements in the system or method.
[0102] The terms includes, including, or any other variations thereof are intended to cover a non-exclusive inclusion such that a setup, device, or method that includes a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup, device, or method. In other words, one or more elements in a system or apparatus proceeded by includes . . . a does not, without more constraints, preclude the existence of other elements or additional elements in the system or method.
[0103] The terms an embodiment, embodiment, embodiments, the embodiment, the embodiments, one or more embodiments, some non-limiting embodiments or aspects, and one embodiment mean one or more (but not all) embodiments of the invention(s) unless expressly specified otherwise. A description of an embodiment with several components in communication with each other does not imply that all such components are required. On the contrary, a variety of optional components is described to illustrate the wide variety of possible embodiments of the disclosure.
[0104] No aspect, component, element, structure, act, step, function, instruction, and/or the like used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles a and an are intended to include one or more items and may be used interchangeably with one or more and at least one. Furthermore, as used herein, the term set is intended to include one or more items (e.g., related items, unrelated items, a combination of related and unrelated items, and/or the like) and may be used interchangeably with one or more or at least one. Where only one item is intended, the term one or similar language is used. Also, as used herein, the terms has, have, having, or the like are intended to be open-ended terms. Further, the phrase based on is intended to mean based at least in partially on unless explicitly stated otherwise. The term some non-limiting embodiments or aspects means one or more (but not all) embodiments or aspects of the disclosure(s) unless expressly specified otherwise. A description of some non-limiting embodiments or aspects with several components in communication with each other does not imply that all such components are required. On the contrary, a variety of optional components is described to illustrate the wide variety of possible embodiments of the disclosure.
[0105] When a single device or article is described herein, it will be clear that more than one device/article (whether they cooperate) may be used in place of a single device/article. Similarly, where more than one device or article is described herein (whether they cooperate), it will be clear that a single device/article may be used in place of the more than one device or article or a different number of devices/articles may be used instead of the shown number of devices or programs. The functionality and/or the features of a device may be alternatively embodied by one or more other devices which are not explicitly described as having such functionality/features. Thus, other embodiments of the disclosure need not include the device itself.
[0106] As used herein, the terms communication, communicate, send, and/or receive may refer to the reception, receipt, transmission, transfer, provision, and/or the like of information (e.g., data, signals, messages, instructions, commands, and/or the like). For one unit (e.g., a device, a system, a component of a device or system, combinations thereof, and/or the like) to be in communication with another unit means that the one unit is able to directly or indirectly receive information from and/or transmit information to the other unit. This may refer to a direct or indirect connection (e.g., a direct communication connection, an indirect communication connection, and/or the like) that is wired and/or wireless in nature. Additionally, two units may be in communication with each other even though the information transmitted may be modified, processed, relayed, and/or routed between the first and second unit. For example, a first unit may be in communication with a second unit even though the first unit passively receives information and does not actively transmit information to the second unit. As another example, a first unit may be in communication with a second unit if at least one intermediary unit (e.g., a third unit located between the first unit and the second unit) processes information received from the first unit and communicates the processed information to the second unit. In some non-limiting embodiments or aspects, a message may refer to a network packet (e.g., a data packet and/or the like) that includes data. It will be appreciated that numerous other arrangements are possible.
[0107] As used herein, the terms server and/or processor may refer to one or more computing devices, such as processors, storage devices, and/or similar computer components that communicate with client devices and/or other computing devices over a network, such as the Internet or private networks, and, in some examples, facilitate communication among other servers and/or client devices. It will be appreciated that various other arrangements are possible. As used herein, the term system may refer to one or more computing devices or combinations of computing devices such as, but not limited to, processors, servers, client devices, software applications, and/or other like components. In addition, reference to a server or a processor, as used herein, may refer to a previously-recited server and/or processor that is recited as performing a previous step or function, a different server and/or processor, and/or a combination of servers and/or processors. For example, as used in the specification and the claims, a first server and/or a first processor that is recited as performing a first step or function may refer to the same or different server and/or a processor recited as performing a second step or function.
[0108] As used herein, the term remote device may refer to one or more computing devices, which may be used by a remote user, such as an industrial hygienist or a project manager, to monitor compliant use of a fall protection compliance system. In some non-limiting embodiments, a remote device may include a computing device configured to communicate with one or more networks and/or facilitate at least one of receiving and sending information from and to a connector, such as, but not limited to, one or more desktop computers, one or more mobile devices, and/or other like devices.
[0109] As used herein, the term computing device may refer to one or more electronic devices that are configured to directly or indirectly communicate with or over one or more networks. In some non-limiting embodiments, a computing device may include a mobile device. A mobile device may include a smartphone, a portable computer, a wearable device (e.g., watches, glasses, lenses, clothing, and/or the like), a personal digital assistant (PDA), and/or other like devices. In some non-limiting embodiments, a computing device may include a server, a desktop computer, and/or the like.
[0110] As used herein, the term system may refer to one or more computing devices or combinations of computing devices such as, but not limited to, processors, servers, client devices, software applications, and/or other like components. In addition, reference to a server or a processor, as used herein, may refer to a previously-recited server and/or processor that is recited as performing a previous step or function, a different server and/or processor, and/or a combination of servers and/or processors. For example, as used in the specification and the claims, a first server and/or a first processor that is recited as performing a first step or function may refer to the same or different server and/or a processor recited as performing a second step or function.
[0111] As discussed herein, certain operations may be performed in a different order, modified, or removed. Moreover, steps may be added to the above-described logic and still conform to the described embodiments. Further, operations described herein may occur sequentially or certain operations may be processed in parallel. Yet further, operations may be performed by a single processing unit or by distributed processing units.
[0112] In the following detailed description of the embodiments of the disclosure, reference is made to the accompanying drawings that form a part hereof, and in which are shown by way of illustration specific embodiments in which the disclosure may be practiced. It should be understood, however, that it is not intended to limit the disclosure to the forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternatives falling within the spirit and the scope of the disclosure. It is to be understood that other embodiments may be utilized and that changes may be made without departing from the scope of the present disclosure. The following description is, therefore, not to be taken in a limiting sense.
[0113] Various embodiments or aspects of the present disclosure are directed to comprehensive fall protection compliance systems and methods for directly monitoring worker safety while using safety equipment, such as fall protection equipment. In some non-limiting embodiments or aspects, the system may be a passive monitoring system that collects data regarding the direct usage and coupling of fall protection equipment, such as, without limitation, harnesses, lanyards, anchorages, horizontal and vertical lifelines, as well as winches, davits, and other raising and lowering equipment.
[0114] In some non-limiting embodiments or aspects, the fall protection compliance system may be configured to detect, such as using one or more electronic sensors, that a connection has been made between a user wearing a fall protection harness or similar safety equipment, and an anchor point. The system may be further configured to indicate the proper connection, disconnection, and usage compliance of the safety equipment regarding an unsafe or safe condition or area. The system may be configured to monitor the connection between the user and the safety equipment and determine whether the worker is securely connected to the safety equipment. In some non-limiting embodiments or aspects, the system may be configured to store information regarding various aspects of the system, such as proper connection of the safety equipment, length of use of the safety equipment, identification of connection to a particular piece of safety equipment. The stored data may have a time and date stamp. In some non-limiting embodiments or aspects, the stored data can be transmitted to a remote device, such as a cell phone or an external monitoring station, and/or stored locally in memory storage for later retrieval.
[0115] In some non-limiting embodiments or aspects, the stored data may indicate the worker identification number, the device identification number, current time, total time that the worker is wearing or connected to the safety equipment, and individual periods of use or non-use of the safety equipment. The system may have built-in algorithms and safeties to both indicate that the user is using the equipment in compliance with standards, but also to prevent tampering or obfuscation of the results. This ensures that the user uses the equipment properly and eliminates the need for direct physical inspection of compliance by an industrial hygienist or compliance officer.
[0116] With initial reference to
[0117] In some non-limiting embodiments or aspects, the fall protection safety equipment 102 may be a lanyard 110 having the first connector 200a at its first end and the second connector 200b at its second end. In other non-limiting embodiments or aspects, the fall protection safety equipment 102 may a line retraction device, such as a self-retracting lanyard (SRL). The SRL may have a safety line that is configured to be unwound (paid out) from a drum when a certain level of tension is applied to the safety line, such as during movement of the user U on the structure S. When such tension is reduced or released, the SRL is configured to slowly rotate in a reverse direction, thereby causing the safety line to retract or rewind onto the drum.
[0118] As further described herein, the fall protection safety equipment 102 includes one or more sensors and associated control devices configured to gather data in real-time as the user U engages in activities on the structure S while wearing the fall protection safety equipment 102. For example, the fall protection safety equipment 102 may include one or more sensors configured to detect a connection status of at least one of the first and second connectors 200a, 200b. In addition, the fall protection safety equipment 102 may include one or more output devices for outputting data that is indicative of the connection status of at least one of the first and second connectors 200a, 200b. For example, the fall protection safety equipment 102 may include one or more devices to generate at least one of an audible feedback (e.g., one or more speakers), a visual feedback (e.g., one or more displays, light emitting diodes (LEDs), or the like), or a tactile feedback (e.g., a vibration device). In addition, the fall protection safety equipment 102 may be configured to transmit the connection status of at least one of the first and second connectors 200a, 200b to a remote device.
[0119] With reference to
[0120] With reference to
[0121] In some non-limiting embodiments or aspects, the connector 200 can be configured for use as an additional component to existing safety equipment, such as by being placed intermediate between the harness 104 and the fall protection safety equipment 102 (shown in
[0122] With continued reference to
[0123] With continued reference to
[0124] In some non-limiting embodiments or aspects, the movable gate 204 may be biased to the closed position. For example, a biasing member, such as a spring 203, may be provided to bias the movable gate 204 to the closed position. In some non-limiting embodiments or aspects, one or more sensors may be provided for detecting the open and/or closed position of the movable gate 204, and/or a movement of the movable gate 204 toward or away from the open/closed position. The movable gate 204 may have a locking assembly 205 for maintaining the movable gate 204 in the closed position and/or permitting movement of the movable gate 204 in a direction from the closed position toward the open position. The locking assembly 205 may be operatively connected to the gate 204 and movable between a first position and a second position, wherein, in the first position, the locking assembly 205 is configured for preventing movement of the gate 204 from the closed position toward the open position, and wherein, in the second position, the locking assembly 205 is configured for permitting movement of the gate 204 from the closed position toward the open position. For example, movement of the movable gate 204 from the closed position may be prevented unless the locking assembly 205 is disengaged (i.e., moved from the first position toward the second position). In this manner, inadvertent opening of the movable gate 204 can be prevented. The locking assembly 205 may be connected to the movable gate 204 by way of a channel 207 that slidably receives a pin 209 of the movable gate 204. The locking assembly 205 may be pivotally movable about a second pivot point 211. When a user operates the locking assembly 205 (e.g., the user squeezes the locking assembly 205 against the frame 202), the locking assembly 205 pivotally moves about the second pivot point 211 to allow the pin 209 to move within the channel 207, which thereby permits movement of the movable gate 204 from the closed position toward the open position.
[0125] With reference to
[0126] With continued reference to
[0127] With continued reference to
[0128] In some non-limiting embodiments or aspects, the one or more sensors 215 may include at least one magnetometer 217. In some non-limiting embodiments or aspects, a plurality of magnetometers 217 may be spaced apart in an arcuate arrangement that corresponds to an arcuate shape of the frame 202. The magnetometers 217 may be disposed in an area of the frame 202 that corresponds to a probable location where the connection structure 300 will be located when the connection structure 300 is disposed within the connection area 206 of the connector 200. At least one permanent magnet, such as a rare earth magnet 219, may be associated with at least one magnetometer 217, such as by being disposed between a plurality of magnetometers 217. The rare earth magnet 219 generates a pre-defined magnetic field within at least a portion of the connection area 206. When a ferromagnetic material, such as the ferromagnetic metal material of the connection structure 300 or other ferromagnetic object, is inserted into the connection area 206, the pre-defined magnetic field generated by the rare earth magnet 219 is disturbed by the presence of such a ferromagnetic material. By measuring the disturbance of the pre-defined magnetic field, the connection sensor assembly 214 is configured to detect the connection status of the connector 200, such as whether the connection structure 300 is disposed in the connection area 206 of the connector 200.
[0129] With continued reference to
[0130] In various non-limiting embodiments or aspects, sensor detection intervals can be optimized with low duty cycles in order to extend battery life. In this manner, the one or more sensors 215 can be turned on, come to steady state, take a record or data point, and then turn off using a particular cycle. If, for example, one or more sensors 215 can complete its entire cycle within only 100 milliseconds, the connector 200 may have a duty cycle of 1% while generating a data point once every 10 seconds. Depending on the type of sensor used for any of the data acquisition requirements, the sensor data acquisition cycle could be longer or shorter.
[0131] The connection sensor assembly 214 may be in a standby or sleep mode prior to connection of the connection structure 300 in order to conserve battery life. In some non-limiting embodiments or aspects, the connection sensor assembly 214 may be activated from the standby or sleep mode by movement of the movable gate 204 and/or the locking assembly 205 from the closed position to the open position. In some non-limiting embodiments or aspects, the connection sensor assembly 214 may be activated from the standby or sleep mode by detecting movement of the connector 200, such as using a gyroscope or an accelerometer. In some non-limiting embodiments or aspects, the connection sensor assembly 214 may be activated from the standby or sleep mode after an initial connection to a connection structure 300 is made. In some non-limiting embodiments or aspects, the connection sensor assembly 214 may be activated from the standby mode by pressing a button, such as a button on the housing 213 of the connector 200. In some non-limiting embodiments or aspects, the connection sensor assembly 214 may be activated from the standby or sleep mode by the user being physically present within a work zone where operation of the connector 200 is desired. For example, the zone may have weight sensors and/or light bar sensors that, once activated due to the user's weight or due to the light beam being broken by the user, an activation signal is sent to the connection sensor assembly 214. The connection sensor assembly 214 may be activated if the user is detected within a predetermined distance of a connection structure where the use of the connector 200 may be required. In further examples, the user may scan into the work area, such as using an RFID tag, and/or the user's presence may be sensed, for example using a sonar or other sensing device, in order to activate the connection sensor assembly 214. In some non-limiting embodiments or aspects, the connection sensor assembly 214 may be activated from the standby or sleep mode when the connector 200 is unplugged from a power source or a home station, such as when the connector 200 is being recharged. Plugging the connector back to the power source or the home station may cause the connection sensor assembly 214 to enter the standby or sleep mode.
[0132] Once activated from the standby or sleep mode, the connection sensor assembly 214 may be configured to detect whether a ferromagnetic material, such as the ferromagnetic material of the connection structure 300 is disposed within the connection area 206 of the connector 200 and/or to detect the presence or absence of an identification element associated with the connection structure 300.
[0133] In some non-limiting embodiments or aspects, the connector 200 may have a communication interface 220 for communicating information regarding the connection status of the connector 200. In some non-limiting embodiments or aspects, the communication interface 220 may be at least one of a visual, audio, vibration, and tactile indicator on the connector 200 configured for indicating the connection status of the connector 200. For example, the communication interface 220 may be one or more lights 240 that indicate a connected or disconnected status of the connector. The one or more lights 240 may have a first visual indication, such as a green light, indicative of a presence of a ferromagnetic material of the connection structure 300 within the connection area 206 and/or a presence of an identification element 320 on the connection structure 300, and a second visual indication, such as a red light, indicative of an absence of the ferromagnetic material of the connection structure 300 within the connection area 206 and/or an absence of an identification element 320 on the connection structure 300. The first visual indication may be the same or different from the second visual indication.
[0134] In some non-limiting embodiments or aspects, the communication interface 220 may be one or more speakers 242 or other audio devices configured to provide a first audio indication, such as a first tone, indicative of a presence of a ferromagnetic material of the connection structure 300 within the connection area 206 and/or a presence of an identification element 320 on the connection structure 300, and a second audio indication, such as a second tone different from the first tone, indicative of an absence of the ferromagnetic material of the connection structure 300 within the connection area 206 and/or an absence of an identification element 320 on the connection structure 300. The first audio indication may be the same or different from the second audio indication.
[0135] In some non-limiting embodiments or aspects, the communication interface 220 may be one or more vibration devices configured to provide a first tactile indication, such as a first vibration, indicative of a presence of a ferromagnetic material of the connection structure 300 within the connection area 206 and/or a presence of an identification element 320 on the connection structure 300, and a second tactile indication, such as a second vibration different from the first vibration, indicative of an absence of the ferromagnetic material of the connection structure 300 within the connection area 206 and/or an absence of an identification element 320 on the connection structure 300. The first tactile indication may be the same or different from the second tactile indication.
[0136] The communication interface 220 may include a transceiver-like component (e.g., a transceiver, a separate receiver and transmitter, etc.) that enables the control device 216 to communicate with other devices, such as via a wired connection, a wireless connection, or a combination of wired and wireless connections. The communication interface 220 may permit the control device 216 to receive information from another device and/or provide information to another device. For example, the communication interface 220 may include an Ethernet interface, an optical interface, a coaxial interface, an infrared interface, a radio frequency (RF) interface, a universal serial bus (USB) interface, a Wi-Fi interface, low-energy Bluetooth interface, a cellular network interface, and/or the like.
[0137] At any given change of connection status of the connector 200, a notification may be generated and communicated to the user via the communication interface 220 regarding the current connection state of the connector 200. These notifications can be segregated into several different categories. For example a green light and a short beep may indicate that the connector 200 is connected to an approved connection structure 300 (i.e., a ferromagnetic connection structure 300 having an identification tag 320), while a long tone and a red light may be used to indicate that the connector 200 is not connected to the connection structure 300 and/or that it is connected to a ferromagnetic connection structure 300 that does not have an identification element 320. Other notifications can be generated using various combinations of communication devices associated with the communication interface 220.
[0138] In some non-limiting embodiments or aspects, the communication interface 220 may have a transmitter 222 for wirelessly transmitting data regarding the status of the connector 200 to a remote device 250 (shown in
[0139] Data recorded by the connector 200 may be transmitted for download by the remote device 250. The transmitted data may include, for example, the time-stamped transitions between all device states, sensor data, and device health status. Once data is downloaded, it can be reviewed by the compliance manager, industrial hygienist or other supervisor personnel. Data may be password protected so that it cannot be overwritten or deleted without being recorded to a permanent record.
[0140] In some non-limiting embodiments or aspects, time and date stamps, along with the unit identification number can be transmitted to the remote device 250. In this manner, if the user is in an area where full compliance is expected (both conditions met), but at least one of the conditions is not met, a safety officer can be dispatched to physically inspect the user to determine the cause for non-compliance. In the event of a fall, the connector 200 can be configured to transmit this event to the remote device 250. In some non-limiting embodiments or aspects, the connector 200 may be configured to transmit a distress signal, such as by placing a call to emergency services, in an event that the user is in distress based on the data received from the one or more sensors 215. In some non-limiting embodiments or aspects, the user can activate the connector 200, such as by pushing a button thereon, to transmit an alert that the user requires assistance, such as in an emergency situation.
[0141] The connector 200 may be configured to save data having predetermined characteristics, such as when sensor readings exceed a predetermined threshold, or when the one or more sensors 215 detect or fail to detect a condition. In some non-limiting embodiments or aspects, the connector 200 may be configured to save data when both conditions of compliant use of the connector 200 are met, such as when a proper connection is made. In an event that the connector 200 is disconnected from the connection structure 300, the connector 200 may store data regarding such event(s).
[0142] In some non-limiting embodiments or aspects, the function of determining compliant use of the connector 200 can be performed externally, such as by the application software used by the remote device 250. In this manner, the information recorded by the connector 200 may be downloaded and evaluated externally to confirm compliance. This function can be carried out on site, remotely using an off-site server or controller, or remotely by reviewing reports submitted by local safety compliance, industrial hygienists, or other safety personnel.
[0143] In some non-limiting embodiments or aspects, the connector 200 may be configured for wireless communication prior to issuance to the worker. For example, the connector 200 may be configured to the user, the safety equipment with which the connector 200 is to be used, the work site, area, and/or other data of importance to the safety officer or industrial hygienist. This may be done using a protocol to protect overwriting or editing the data.
[0144] With reference to
[0145] The control device 216 may be configured to use data from at least one of the plurality of sensors 215, such as at least one magnetometer 217 and/or the at least one short-range wireless communication antenna 221, to determine the connection status of the connector 200. For example, the control device 216 may determine that the connector 200 has been connected to the connection structure 300 based on a number of ordered operations, such as by receiving data indicating movement of the movable gate 204 from the closed position to the open position. The control device 216 may further receive data from the one or more magnetometers 217 indicating that the connection structure 300 is disposed within the connection area 206. The control device 216 may further receive data from the at least one short-range wireless communication antenna 221 indicating that the identification element 320 of the connection structure 300 is disposed in proximity of the connector 200.
[0146] After determining that the connector 200 is connected to the connection structure 300, such as by detecting the presence of the ferromagnetic material of the connection structure 300 within the connection area 206 of the connector 200 and/or detecting the presence of the identification element 320 of the connection structure 300 in proximity of the at least one short-range wireless communication antenna 221 of the connector 200, the control device 216 may be configured to indicate that a proper connection has been made, such as by generating an audible, visual, or a tactile alert. For example, if the connector 200 is connected to the connection structure 300, such as by detecting the presence of the ferromagnetic material of the connection structure 300 within the connection area 206 of the connector 200, and the at least one short-range wireless communication antenna 221 detects the presence of the identification element 320 that is an expected identification element (i.e., the identification element 320 corresponding to the connection structure 300 to which the connector 200 is supposed to be connected to), the control device 216 may be configured to actuate the communication interface 220 to display a first light (such as a green status light), and/or to emit a first sound, and/or to generate a first tactile response.
[0147] If the control device 216 determines that the connector 200 is not connected to the connection structure 300, such as by failing to detect the presence of the ferromagnetic material of the connection structure 300 within the connection area 206 of the connector 200 and/or failing to detect the presence of the identification element 320 of the connection structure 300 in proximity of the at least one short-range wireless communication antenna 221 of the connector 200, the control device 216 may be configured to indicate that an improper connection has been made, such as by generating an audible, visual, or a tactile alert. For example, if the connector 200 is not connected to a connection structure or is connected to a ferromagnetic material that is not an approved connection structure 300, and/or if the at least one short-range wireless communication antenna 221 fails to detect the presence of the identification element 320 or if the at least one short-range wireless communication antenna 221 detects an unexpected identification element (i.e., the identification element 320 corresponding to the connection structure 300 to which the connector 200 is not supposed to be connected to), the control device 216 may be configured to actuate the communication interface 220 to display a second light (such as a red status light), and/or to emit a second sound, and/or to generate a second tactile response, wherein the second light, the second sound, and the second tactile response are different from the first light, the first sound, and the first tactile response, respectively.
[0148] With reference to
[0149] With continued reference to
[0150] Referring now to
[0151] Bus 260 may include a component that permits communication among the components of the control device 216. In some non-limiting embodiments or aspects, processor 262 may be implemented in hardware, firmware, or a combination of hardware and software. For example, processor 262 may include a processor (e.g., a central processing unit (CPU), a graphics processing unit (GPU), an accelerated processing unit (APU), etc.), a microprocessor, a digital signal processor (DSP), and/or any processing component (e.g., a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), etc.) that can be programmed to perform a function. Memory 264 may include random access memory (RAM), read-only memory (ROM), and/or another type of dynamic or static storage device (e.g., flash memory, magnetic memory, optical memory, etc.) that stores information and/or instructions for use by processor 262.
[0152] The storage component 268 may store information and/or software related to the operation and use of the control device 216. For example, the storage component 268 may include a hard disk (e.g., a magnetic disk, an optical disk, a magneto-optic disk, a solid state disk, etc.), a compact disc (CD), a digital versatile disc (DVD), a floppy disk, a cartridge, a magnetic tape, and/or another type of computer-readable medium, along with a corresponding drive.
[0153] The input component 270 may include a component that permits the control device 216 to receive information, such as via user input (e.g., a touchscreen display, a keyboard, a keypad, a mouse, a button, a switch, a microphone, a camera, etc.). Additionally or alternatively, input component 270 may include a sensor for sensing information (e.g., a global positioning system (GPS) component, an accelerometer, a gyroscope, an actuator, etc.). Output component 272 may include a component that provides output information from the control device 216 (e.g., a display, a speaker, one or more LEDs, etc.).
[0154] The control device 216 may perform one or more processes described herein. The control device 216 may perform these processes based on the processor 262 executing software instructions stored by a computer-readable medium, such as the memory 264 and/or the storage component 268. A computer-readable medium (e.g., a non-transitory computer-readable medium) is defined herein as a non-transitory memory device. A memory device includes memory space located inside of a single physical storage device or memory space spread across multiple physical storage devices.
[0155] Software instructions may be read into the memory 264 and/or the storage component 268 from another computer-readable medium or from another device via the communication interface 220. When executed, software instructions stored in the memory 264 and/or the storage component 268 may cause the processor 262 to perform one or more processes described herein. Additionally or alternatively, hardwired circuitry may be used in place of or in combination with software instructions to perform one or more processes described herein. Thus, embodiments or aspects described herein are not limited to any specific combination of hardware circuitry and software.
[0156] The memory 264 and/or the storage component 268 may include data storage or one or more data structures (e.g., a database, and/or the like). The control device 216 may be capable of receiving information from, storing information in, communicating information to, or searching information stored in the data storage or one or more data structures in the memory 264 and/or the storage component 268. For example, the information may include input data, output data, or any combination thereof.
[0157] The number and arrangement of components shown in
[0158] With reference to
[0159] With reference to
[0160] With continued reference to
[0161] With continued reference to
[0162] In some non-limiting embodiments or aspects, the one or more sensors 215 is a Hall effect sensor configured for detecting whether the connector 200 is connected to a piece of safety equipment. The Hall Effect sensor may be mounted flush with an outside surface of the housing 213. The Hall Effect sensor may be surrounded by or positioned proximate to a magnetic surface. This magnetic surface may be configured to interact with a magnet 228 that is attached to a portion of a fall protection assembly, such as the safety harness 104 and the lanyard 110. In some non-limiting embodiments or aspects, the separate magnets 228 may be permanently secured to the lanyard 110 and the harness 104 by way of a cable and grommet, or by way of a riveted connection.
[0163] When the user connects the D-ring of the safety harness 104 to the lanyard 110 or other device, the connector 200 is disposed therebetween such that the magnet 228, either automatically or with additional guidance from the user, aligns and connects to the magnetic surface of the Hall effect sensor. This action changes the state of the Hall Effect sensor and indicates that the safety harness 104 is connected to the lanyard 110 via the connector 200. The length of the cable connected to the magnet 228 is only as long as the distance between the Hall Effect sensor on the connector 200 and its cabled anchor point on the lanyard 110. The cable is sufficiently strong as to align with the connector 200, but flexible enough to bend as the connector 200 is in use and the magnet is strong enough to stay attached under normal motion of the worker throughout the work day. The Hall Effect sensor may also be incorporated with the connection sensor assembly 214 described herein with reference to
[0164] In some non-limiting embodiments or aspects, the one or more sensors 215 may be a strain gauge configured to detect connection of the safety harness 104 to the lanyard 110 or other safety equipment by way of pull strain at the connection interface of these components. One end of the strain gauge may be connected to a fixed anchor point or on the harness 104, while the other end of the strain gauge may be connected to the lanyard 110. In this manner, the connection of the lanyard 110 to the harness 104 is detected due to a strain reading on the strain gauge of the connector 200. The strain gauge may also be incorporated with the connection sensor assembly 214 described herein with reference to
[0165] In some non-limiting embodiments or aspects, the one or more sensors 215 may be a contact switch configured to detect connection of the safety harness 104 to the lanyard 110 or other fall protection device. The contact switch may have a shield or arm that prevents a carabiner or other device to connect to the D-ring of the harness 104 or the connector 200 without tripping the switch. The switch may be part of an assembly including an arm that partially covers the area within the D-ring. When the connector 200 connects to the D-ring of the harness 104, the arm or shield is moved away from its home position, thereby causing the switch to open or close depending on its configuration to indicate that a connection has been made between the D-ring of the harness 104 and the connector 200. A similar connection mechanism may exist between the lanyard 110 or other fall protection device and the connector 200. The contact switch may also be incorporated with the connection sensor assembly 214 described herein with reference to
[0166] In some non-limiting embodiments or aspects, the one or more sensors 215 may be configured to detect movement of the connector 200, such as due to movement of the worker. In such embodiments or aspects, the one or more sensors 215 may be a gyroscope and/or an accelerometer. The gyroscope and/or accelerometer may also be incorporated with the connection sensor assembly 214 described herein with reference to
[0167] In further embodiments or aspects, the one or more sensors 215 may include a gyroscope, an accelerometer, and a Hall Effect sensor. In this configuration, the gyroscope and accelerometer are configured for detecting a near zero acceleration event (fall), a high acceleration event (fall arrest), motion or lack of motion, and worker orientation. The accelerometer may be configured to detect motion even if the worker is in a relatively static position such as when the worker is seated, kneeling, or in a prostrate position. The Hall Effect sensor may detect whether the connector 200 is connected to or disconnected from the fall protection assembly, as described herein. For example, in an event of a fall from an elevated surface, the unit connector 200 may be configured to record the time and date of the event, along with the orientation and motion of the worker prior to, during, and after the fall event. In this way, specific alarms can be configured, broadcast, and recorded, regarding the state of the worker as being in distress or being able to recover from a possible fall event. If the accelerometers or gyroscopes show accelerations other than that of just gravity (e.g. the unit is NOT at rest, but is moving) then a second condition of compliant use of the connector 200 is met. In any embodiment or aspect where the one or more sensors includes an accelerometer or a gyroscope, data from these sensors can be used to show a pattern of use or behavior regarding the device over time. In embodiments or aspects where the connector 200 has a gyroscope, the initial orientation of the gyroscope can be determined and saved as a baseline orientation. Deviation in orientation from this baseline orientation can be used for generating an alert that the user may have fallen or is in a situation where assistance may be required. The combined gyroscope, an accelerometer, and a Hall Effect sensor may also be incorporated with the connection sensor assembly 214 described herein with reference to
[0168] In some non-limiting embodiments or aspects, the loop-shaped first and second ends 202a, 202b of the connector 200 may have a retractable cover panel 230 movable between a retracted position and an extended position. In the retracted position, the loop-shaped ends 202a, 202b are open to allow connection of the connector 200 to another device, such as the D-ring of the harness 104 or the lanyard 110. In the extended position, the loop-shaped ends 202a, 202b are covered to prevent connection of such devices to the connector 200. The retractable panel 230 may be configured to be automatically moved from the extended position to the retracted position when a D-ring, carabiner or other connector used in fall protection applications is attached to either end 202a, 202b.
[0169] The retractable panel 230 may be connected to a sensor, such as a mechanical, electrical, or an optical sensor, that is configured to detect the position of the cover panel 230, such as the retracted position, the extended position, or an intermediate position between the extended position and the retracted position. In some non-limiting embodiments or aspects, connection of the D-ring, carabiner or other connector used in fall protection applications to the connector 200 may move the panel 230 from the extended to the fully retracted position in a direction of arrow B in
[0170] In some non-limiting embodiments or aspects, a deflectable element 232, such as a paddle, may be disposed within an open area of the first and second ends 202a, 202b of the frame 202 of the connector 200. The deflectable element 232 may be configured to pivot around the axis that is perpendicular to the housing 213 between an undeflected, or closed position and a deflected, or open position. The deflectable element 232 may be biased to the closed position by a biasing mechanism, such as a spring. The deflectable element 232 may interact directly or indirectly with a switch, such as a contact, optical, magnetic or other type of switch. In some non-limiting embodiments or aspects, the switch may be a non-contact type such that the housing 213 can be completely sealed from the surrounding environment. When a connection is made to the first or second end 202a 202b of the frame 202, the deflectable element 232 is moved from its initial position to a second, deflected position. The connector 200 may be configured to detect whether a connection has been made to one or both of the ends 202a, 202b of the frame 202 based on a position of the deflectable element 232. If the connector 200 detects that both ends 202a, 202b are connected to a respective connector, this information may indicate a first condition of compliant use of the fall protection assembly.
[0171] The connector 200 may be configured to store data received from one or more sensors 215, along with time, date, and/or location data associated with data received from one or more sensors 215. The connector 200 may have an acquisition mode wherein data received by one or more sensors 215 is stored in system memory along with a time, date, and/or location stamp. When in the acquisition mode, the connector 200 may store any conditional change of the one or more sensors 215, along with a time, date, and/or location stamp. For example, turning the connector 200 on and placing it in the acquisition mode may save in the system memory an initial time, date, and/or location stamp. Connection of one end 202a, 202b of the frame 202 to a connector generates a conditional change in the one or more sensors 215, which is saved in the system memory along with the time, date, and/or location stamp associated with such conditional change. Similarly, if the connector 200 is in motion due to movement of the worker, such conditional change may be saved in the system memory along with the time, date, and/or location stamp associated with such conditional change. Data recorded to system memory can be organized in any manner of logs or intervals from minutes, hours, shifts, days, weeks, or similar.
[0172] Referring now to
[0173] In some non-limiting embodiments or aspects, the environment 400 allows authorized users to perform preventive occupational health and safety actions and manage inspections and maintenance of safety equipment. Each remote device 250 may be configured to transmit and/or receive data to and/or from the connectors 200 of the fall protection compliance system 100 via a short-range wireless communication connection (e.g., an NFC communication connection, an RFID communication connection, a Bluetooth communication connection, and/or the like). In some non-limiting embodiments or aspects, the remote device 250 may be associated with a user (e.g., a safety manager).
[0174] Communication network 402 may include one or more wired and/or wireless networks. For example, the communication network 402 may include a cellular network (e.g., a long-term evolution (LTE) network, a third generation (3G) network, a fourth generation (4G) network, a fifth generation (5G) network, a code division multiple access (CDMA) network, etc.), a public land mobile network (PLMN), a local area network (LAN), a wide area network (WAN), a metropolitan area network (MAN), a telephone network (e.g., the public switched telephone network (PSTN)), a short-range wireless communication network (e.g., an NFC communication network, an RFID communication network, a Bluetooth communication network, and/or the like), a private network, an ad hoc network, an intranet, the Internet, a fiber optic-based network, a cloud computing network, and/or the like, and/or a combination of some or all of these or other types of networks.
[0175] The number and arrangement of systems and/or devices shown in
[0176] With reference to
[0177] Referring now to
[0178] With continued reference to
[0179] With continued reference to
[0180] With continued reference to
[0181] With continued reference to
[0182] With continued reference to
[0183] The language used in the specification has been principally selected for readability and instructional purposes, and it may not have been selected to delineate or circumscribe the inventive subject matter. It is therefore intended that the scope of the disclosure be limited not by this detailed description, but rather by any claims that issue on an application based hereon. Accordingly, the disclosure of the embodiments of the disclosure is intended to be illustrative, but not limiting, of the scope of the disclosure, which is set forth in the following claims.
[0184] As noted above, a connection structure as described herein can take a variety of forms.
[0185] The hook connection structure 1400 of
[0186] The hook structure 1402 may further be equipped with one or more accelerometers 1416, 1418. In the example of
[0187] The example of
[0188] The hook portion 1402 of
[0189] As noted above, each of the sensors 1414, 1416, 1418, 1420 provide data that provides some indication on whether a user utilizing the connection structure 1400 is continually connected to the anchor structure. In embodiments, the electronics 1412 on the connection structure 1400 are configured to determine based on data from one or more of the sensors whether a user is currently properly connected to the anchor structure. The electronics 1412 are configured to store data associated with that sensed continued connection of the connection structure 1400 to the anchor structure (e.g., a Boolean yes/no connection signal, a likelihood of proper connection value, a connection type value (e.g., no connection, connection with active movement, connection with limited movement)). That data can be output from the connection structure to an external entity for monitoring compliance, and in embodiments can be used to issue an alarm (e.g., an audible alarm when a lack of connectivity is detected to prompt a user to reconnect).
[0190]
[0191] As noted above, a fall protection compliance system may monitor continued connection of the connection structure to the anchor structure over a period of time and to output a signal indicating that continued connection, such as logic embedded in electronics associated with the connection structure. In one embodiment, the logic dictates that a connection or disconnection event will be preceded by a signal from the gate switch 1414. A user depresses gate lock 1410 while simultaneously moving the movable gate 1408 to transition the movable gate 1408 to the open position. This allows the user to connect or disconnect the connection structure from the anchor structure. When the movable gate 1408 is moved to the open position, an edge 1502 of the movable gate structure contacts a lever on the interlock switch 1414, actuating the switch. As noted above, a signal from the switch 1414 indicating a move to the open position can act as a wakeup signal for the electronics of the connection structure, such that the electronics begin to actively seek to detect an initial and ongoing connection of the connection structure with the anchor structure. An open gate signal, followed by a closed gate signal, in combination with signals from the other sensors (e.g., an accelerometer, a piezo sensor, a pressure switch) can be deemed an indicator that a connection has been established. Further signals from those other sensors can indicate continued connection. A subsequent open gate signal from the gate switch 1414 could be indicative of a disconnect event. For example, a subsequent open gate switch followed by limited or no further signals from other sensors could be interpreted by the electronics as a disconnect event for storage in a memory, log file, or transmission to an external entity.
[0192]
[0193]
[0194] A pressure switch is depicted at 1750. There, the protective spring 1706 having the piezo sensor piezo cable therein (connection of the piezo cable to the electronics 1704 not shown) is set for positioning between the inner 1708 and outer 1710 deformable structures. The pressure switch depiction at 1750 illustrates the protective spring 1706 being connected to a first wire 1752 that connects to the electronics of the connection structure. A contact plate 1754 is positioned within the outer deformable structure 1710, with the contact plate 1754 being connected to a second wire 1756 that connects to the electronics of the connection structure. In operation, when an anchor structure is within the end portion of the connection structure, the anchor structure can impart a force on the inner deformable structure 1708. That force pushes the protective spring 1706 such that it makes contact with the contact plate 1754. This completes a circuit through wire 1752, protective spring 1706, contact plate 1754, and wire 1756 to the electronics, providing a signal indicating pressure being applied at the pressure switch. In another embodiment the positions of the contact plate and protective spring relative to the anchor structure may be reversed such that as the anchor structure imparts a force on the inner deformable structure, and the contact plate makes contact with the protective spring. In examples, the shape of the deformable structures may be augmented to provide desired characteristics of sensor output signals. For example, a fulcrum structure 1758 can be implemented on the inner deformable structure 1718 such that an output of the piezo sensor 1700 and/or pressure sensor 1750 provides a recognizable signature under certain operational scenarios.
[0195] As noted above, signals from the various sensors that may be integrated with the connection structure can be used to identify connection of the connection structure to an anchor structure. In addition to a Boolean connected/not connected detection, a connection structure or external processor analyzing signals therefrom may detect more refined indications of connection status and events. For examples, signatures of different known connection statuses (e.g., not connected, a stationary (sitting, standing, kneeling) connected user, a moving connected user, a connection structure not connected to a user) can be compared to current output from one or more sensors to provide an indication of a type of current connection.
[0196] In the example of
[0197]
[0198] In addition to recognition of particular waveforms as indicating connectivity status, the continued presence of an output signal from a piezo sensor can be utilized.
[0199] A process for providing fall protection compliance monitoring may take a variety of forms.
[0200]
[0201] Alternate examples of components and concepts herein are also within the scope of this disclosure. For example, mechanisms for monitoring the status of a gate structure of a hook may take a variety of forms.
[0202]
[0203]
[0204]
[0205]
[0206]
[0207] In another embodiment, the torsion arm 2316 may be connected to the rotatable portion 2312 of the hook that rotates clockwise when the movable gate 1408 is moved to the open position. That gate opening motion brings the magnet 2306 near to the reed switch 2308, which generates a signal indicating the current position of the movable gate 1408. In an embodiment, the torsion arm is biased by a spring, such that physical interaction of the magnet 2306 with the reed switch 2308 compresses the spring, generating a counterclockwise force, pushing the structure to close the movable gate 1408.
[0208] In some embodiments, it may be beneficial to have a housing within the connection structure that is able to rotate with the connector. For example, such an arrangement may keep close proximity between an identification element positioned within the housing and a connection sensor assembly of a connector. That close proximity can increase the reliability of reads of the identification element by the connection sensor assembly when a connector is properly connected to a connection structure having a housing therein.
[0209]
[0210] With further reference to
[0211] In embodiments, the housing 2406 is able to rotate within the connection loop 2402 as pushed by the connector 200 connected within the aperture 2408, maintaining close proximity between the identification element 2420 and the connection sensor assembly 214 for reading the identification element 2420 while allowing freedom of movement for the operator connected to the connection structure 2400.
[0212] A housing, as depicted in
[0213]
[0214]
[0215]
[0216] With reference back to
[0217]
[0218] As noted above, in embodiments, the housing 2406 may be configured to rotate within the connection loop 2402 based on relative movement of the connector 200.
[0219] Fall protection compliance systems as described herein may be implemented in a variety of use cases. In one example, a connector 200 is connected to a structure and is configured for further connection to a connection structure 300 (e.g., a connection device) that is attached to a user, such as a ring (e.g., a D ring) attached to a harness that the user is wearing. In some instances, the connector 200 is attached to a permanent or semi-permanent structure, such as a beam of a building structure. In other instances, the connector 200 is connected to a transitory structure or a structure that is designed to move, such as a top structure of a forklift or a scissor lift. In certain of these instances, the connector 200 may be in a position where it can receive power from an external power source while in operation (e.g., from a building power source when the connector 200 is connected to a permanent structure, from a battery associated with the forklift). In other instances, the connector 200 is not connected to a power source when in operation, such that the connector 200 operates on battery power.
[0220]
[0221] Connection of a user to a supporting structure that is at a limited height above the user can introduce difficulties, including with detecting connection of the user to a connection device 300. An example of this is depicted at 3206. There, a connector 200, taking the form of a D-Ring on the back of a harness worn by the user is held at an elevated position relative to an end portion 3208 of the connection device 300. This may occur when the height of the connector 200 on a standing user is higher than the hanging level of the connection device 300 connected to the fall limiter 3204. As described herein above, in some instances, instruments (piezo sensors, RFID readers, magnetic sensors, inductive sensors) for sensing a connection of the connector 200 to the connection device 300 are positioned at the end portion 3208 and take advantage of the typical close proximity of the connector 200 to the end portion 3208. The relative positioning of the connector 200 to the connection device 300 depicted at 3206 can create sensing challenges. Certain sensors that are based on forces, induction, or other phenomena based on contact or near contact between the connector 200 and the end portion 3208 may function suboptimally when the connector 200 is frequently spaced from the end portion 3208 where those sensors are often positioned. In instances where the connector 200 includes an identification element, such as an RFID tag, a reader positioned in the end portion 3208 may also not consistently read the identification element when the connector 200 is not consistently positioned touching or in close proximity to the end portion 3208.
[0222] It may also be desired to confirm that a user is safely connected to an approved anchor point. For example, some structures, such as a fork lift or a scissor lift, may include a number of points where a connection device (e.g., a snap hook) could be connected. But certain of those possible connection points may not be designed to support the weight of the user, especially during a fall. So in some instances, it may be desired to not only confirm that a user is connected to some structure, it may further be desired to determine whether the user is connected to an approved anchor point, where operation of a machine may be controlled accordingly. Certain systems and methods herein provide solutions that address certain of these goals and obstacles.
[0223]
[0224] In the example of
[0225]
[0226] The use of a battery 3414 in the example of
[0227] In one example, a first gate sensor is used to indicate when the gate of a snap hook is open, a condition that indicates a connector 3406 may be being inserted or removed from the snap hook. An open gate signal may wake up a second, connection sensor that may detect conditions such as whether or not a connector 3406 is currently within the snap hook as well as properties associated with any detected connector 3406. For example, when the sensor system 3412 detects an open gate via the first sensor, a connector 3406 within the snap hook via the second sensor, and a closed gate via the first sensor, the sensor system 3412 may determine that the connection device 3408 is connected to a connector 3406 and transmit a signal 3416 to the machine 3402 via its transmitter/receiver 3418. That signal may be forwarded to the machine inhibitor 3420, which may allow operation of the machine 3402 based on the connected status. The first and/or second sensor and/or other processing functionality of the sensor system 3412 may then be put into a low power state.
[0228] In another example, where the sensor system 3412 has previously detected a connection between the connector 3406 and the connection device 3408, a detection of an open gate by the first sensor may again wake the second sensor. Should the second sensor then detect the absence of the connector 3406 within the snap hook followed by a closed gate signal from the first sensor, the sensor system may determine that the connector 3406 is no longer connected to the connection device 3408. The sensor system 3412 may send a no connection signal 3416 to the machine 3402, where the machine inhibitor 3420 then prohibits all or certain operations of the machine. The first and/or second sensor and/or other processing functionality of the sensor system 3412 may then be put into a low power state.
[0229] In a further example, where the first, gate sensor detects an opening of the gate followed by a closing of the gate, where the second connection sensor does not detect a change in the status of the connection between the connector 3406 and the connection device 3408, a repeat of the previous connection status signal 3416 or no additional signal may be transmitted to the machine 3402 such that its operational state remains the same. The system may then return to a low power state. In other examples, a system that is awoken by an open gate signal from the first sensor, where no further detection of a change of state by either the first sensor or the second sensor is received for a period of time may return to a low power state. Alternatively, an open gate signal that is not followed by a closed gate signal may be a cause for the system to issue an alarm based on an indication of a possible unintentional improper connection (e.g., clothing or other obstruction of the gate of the snap hook resulting in an partially open gate and unsecure connection that could be dislodged in a fall).
[0230] The sensor system 3412 may detect and report other connection data via the link at 3416. For example, the sensor system 3412 may periodically send data regarding a continuity of connection to the machine, where that periodic signal is required for the machine inhibitor 3420 to continue to allow operation of the machine 3402. In one example, the sensor system 3412 is equipped with sensors that detect motion of the connection device 3408 that indicate that a user remains connected to the connection device 3408 (e.g., the user has not taken off his harness). Such sensors may include a gyroscope, a sensor (e.g., a light sensor, a lifeline-friction-turned wheel) that monitors paying out and retraction of a life line between the connection device 3408 and the connector 3406, or a piezo sensor embedded in the connection device 3408. In one embodiment, certain periodic motion is excluded from qualifying as indicating continuity of connection, where such periodic motion could be the result of a hanging connection device 3408 with no user attached (e.g., the user removes a harness and allows it to hang from the connector 3406 via the connected connection device 3408).
[0231] The sensor system 3412 may be equipped with a variety of sensors for detecting connection, characteristics of the connection, and continuity of connection. In embodiments, the sensor system 3412 includes one or more of an RFID reader, a barcode scanner, a QR scanner, an inductive sensor, a capacitive sensor, a magnetic sensor, an infrared proximity sensor, an accelerometer, and a strain gauge
[0232] In one example the connection device 3408 is configured to use motion of the device 3408 for energy harvesting to recharge the battery 3414. For example, current generated at a piezo sensor embedded in a snap hook could be routed to the battery for 3414 for charging. In another example, winding or unwinding of a drum holding a lifeline of the fall limiting device 3410 could be used as a generator of current for charging of the battery 3414 extending the life of the sensor system 3412 between recharges.
[0233] In addition to detecting whether or not the connection device is connected to a connector, a sensor system may be configured to determine characteristics of the connector to which a connection device is connected.
[0234] Based on detection of connection to an approved anchor point 3504, the sensor system is configured to send a signal 3514 to the machine 3516 via 3518 to control operation of the machine 3516, such as using the machine inhibitor 3520. In an alternative embodiment, the signal 3514 transmits other data (e.g., raw sensor data, the detected property of the connector 3502), where another processor (e.g., at the machine inhibitor 3520) determines whether the received data signal 3514 indicates connection to an approved anchor point 3504 and acts accordingly.
[0235] Certain machines may also include unapproved anchor points 3508 to which a connector 3506 might be attached. For example, a scissor lift might include certain rails that are designed to prevent a user from falling off the lift but are not sufficiently reenforced to support arresting the fall of a user. While those rails might be shaped so as to have a connector 3506 or a connection device 3522 connected thereto, it may be desirable to not allow operation of the machine when the connection device 3522 is not connected to an approved anchor point 3504. In one example, the connection device 3522 is able to detect, and in some embodiments report to the machine 3516, that the device 3522 is connected to a connector 3506 (or to the unapproved anchor point 3508 directly). But because that connector 3506 does not have the detectable indicia of an approved anchor point 3504, the sensor system 3524 is unable to report that the connection device 3522 is connected to an approved anchor point. In another example, the failure to detect indicia of an approved anchor point 3504 results in the sensor system 3524 determining that no connection is made at all, where a no connection signal may be sent at 3526, or no connection signal at all is sent via 3526 to the machine 3516.
[0236] In one embodiment, connection to an approved anchor point is detected based on time of flight of signals from one or more reference points.
[0237]
[0238] Although the disclosure has been described in detail for the purpose of illustration based on what are currently considered to be the most practical and preferred embodiments or aspects, it is to be understood that such detail is solely for that purpose and that the disclosure is not limited to the disclosed embodiments or aspects, but, on the contrary, is intended to cover modifications and equivalent arrangements that are within the spirit and scope of the appended claims. For example, it is to be understood that the present disclosure contemplates that, to the extent possible, one or more features of any embodiment or aspect can be combined with one or more features of any other embodiment or aspect.