WO2020202277A1

WO2020202277A1 - Hook detection device, hook detection program, and hook detection method

Info

Publication number: WO2020202277A1
Application number: PCT/JP2019/014082
Authority: WO
Inventors: 拓弥橋口; 貴耶谷口; 敬秀平井; 泰行浅井; 亮平古藤
Original assignee: 三菱電機株式会社
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2020-10-08
Also published as: JP6903251B2; JPWO2020202277A1

Abstract

Provided is a hook detection device (20) comprising: an image acquisition unit (21); an operator count unit (22); a hook determination unit (23); an operator detection unit (24); and an alert emission unit (25). The image acquisition unit (21) acquires an image from an image capture device (10) which captures an image of operators who are working at a work site and to whom a hook has been attached. The operator count unit (22) counts the number of operators captured in the image. The hook determination unit (23) determines the number of used hooks which indicates the number of hooks attached to members positioned in the work site. The operator detection unit (24) detects an operator not using a hook on the basis of the counted number of operators and the determined number of used hooks. If an operator not using a hook is detected, the alert emission unit (25) outputs an alert signal to an operation command unit (26).

Description

Hook detection device, hook detection program and hook detection method

The present invention relates to a detection device, a hook detection program, and a hook detection method for detecting whether or not an operator is using a hook in a safety belt.

In the prior art, the operation of the elevator is controlled based on the comparison between the number of car workers in the above elevator and the number of safety belts attached to ensure the safety of the workers (for example, Patent Document 1). In the prior art, the number of workers is placed on the hook by means of an IC tag placed on the hook and a tag reader placed on the safety belt attachment hook.
Therefore, since the hook and the tag reader are arranged on the safety belt attachment hook, it is necessary to process the hook and the safety belt attachment hook.
Further, in the prior art, the position where the hooking tool is hung is limited.

As described above, in the prior art, it is necessary to process the hook and the safety belt attachment hook, and the attachment position of the hook to the mating member is limited.
The processing into the hooking tool is complicated, and there is a problem that the limitation of the position where the hooking tool is hung reduces the workability of the operator.

Japanese Unexamined Patent Publication No. 2018-095380

An object of the present invention is to provide a hook detection device that does not require processing of a hook and a safety belt attachment hook and does not limit the attachment position of the hook.

The hook detection device of the present invention
An image acquisition unit that continuously acquires images from an image pickup device that captures a worker wearing a hook who works in the workplace.
A worker counting unit that counts the number of workers captured in the image by analyzing the image, and
By analyzing the image, a hook determination unit for determining the number of hooks used indicating the number of the hooks hung on the member arranged in the workplace, and a hook determination unit.
A worker detection unit that detects the worker who is not using the hook based on the counted number of workers and the determined number of hooks used.
When the worker who is not using the hook is detected, a warning generating unit for outputting a warning signal is provided.

According to the hook detection device of the present invention, it is possible to provide a hook detection device that does not require processing of the hook and the safety belt attachment hook and does not limit the attachment position of the hook.

In the figure of the first embodiment, the front view of the worker 50 wearing the safety belt 50B. In the figure of the first embodiment, the rear view of the worker 50 wearing the safety belt 50B. FIG. 5 is a diagram showing a worker 50 and a worker 60 working on a top plate 71 of a car 70 in the figure of the first embodiment. FIG. 5 is a diagram showing an outline of the operation of the hook detection device 20 in the figure of the first embodiment. FIG. 1 is another diagram showing an outline of the operation of the hook detection device 20 in the figure of the first embodiment. FIG. 6 is a block diagram of a functional configuration of the hook detection device 20 in the figure of the first embodiment. FIG. 5 is a diagram showing a hardware configuration of the hook detection device 20 in the figure of the first embodiment. FIG. 5 is a flowchart of the operation of the hook detection device 20 in the figure of the first embodiment. FIG. 2 is a block diagram of a functional configuration of the hook detection device 20 in the figure of the second embodiment. FIG. 2 is a diagram schematically showing the positions of the car 70 and the weight 92 in the figure of the second embodiment. FIG. 2 is a diagram showing a configuration in which the function of the hook detection device 20 is realized by hardware in the figure of the second embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the same or corresponding parts are designated by the same reference numerals. In the description of the embodiment, the description will be omitted or simplified as appropriate for the same or corresponding parts.

In the following embodiment, the work place on which the worker works is described by taking the top plate 71 of the elevator car 70 as an example. However, the work place is not limited to the top plate 71. The workshop may be the roof of a 10-story building under construction or a tall place such as a power transmission tower.

Embodiment 1.
1 and 2 show a safety belt 50B worn by the worker 50.
FIG. 1 shows the front of the worker 50 wearing the safety belt 50B, and FIG. 2 shows the back of the worker 50 wearing the safety belt 50B. As shown in FIG. 2, the safety belt 50B includes a hook 51 and a wire 52. One end of the wire 52 is fixed to the safety belt 50B, and the other end of the wire 52 is attached with a hook 51. The hook 51 corresponds to the hook 51 described in the prior art. FIG. 2 shows a state in which the hook 51 is hooked on the fence 72 described later. In the following embodiments, the hook means a hook provided with a safety belt worn by the operator.

FIG. 3 shows a worker 50 and a worker 60 working on the top plate 71 of the elevator car 70. FIG. 3 also shows the car door 73. The worker 50 wears the safety belt 50B, and the worker 60 wears the safety belt 60B. The safety belt 60B has the same configuration as the safety belt 50B. A fence 72 is provided along the edge of the top plate 71. The worker 50 hooks the hook 51 of the safety belt 50B on the fence 72 to ensure the safety of work. That is, the worker 50 hooks the hook 51 on the fence 72 so as not to fall from the top plate 71 of the car 70 into the hoistway during the work. The state in which the hook 51 is hooked on the fence 72 is expressed as a used state, a used state, or a use of the hook 51. On the contrary, the state in which the hook 51 is not hooked on the fence 72 is expressed as an unused state, an unused state, or an unused state of the hook 51. The above is the description of the worker 50, but the worker 60 is the same as the worker 50.

4 and 5 show an outline of the operation of the hook detection device 20 of the first embodiment. Note that the safety belts 50B and 60B are simplified in FIGS. 4 and 5. In FIG. 4, two columns 81 are arranged on the top plate 71, and an imaging device 10 is installed on each column 81. A warning device 80 is attached to one of the columns 81. Worker 50 and worker 60 are working on the top plate 71 of the basket 70.

In FIG. 4, the worker 50 hooks the hook 51 on the fence 72. That is, the hook 51 is in use. The same applies to the worker 60. In FIG. 5, the worker 60 does not hook the hook 61 on the fence 72 with respect to FIG. That is, the hook 61 is in an unused state.

The hook detection device 20 detects the presence of an operator who is not using the hook by image analysis of the camera image. The outline is as follows. The hook detection device 20 counts the number of workers on the top plate 71 and the hooks in use by using the images acquired from the two image pickup devices 10. The hook detection device 20 is in a warning state when the number of workers on the top plate 71 is larger than the number of hooks in use, and when the warning state continues for a certain period of time, the operation control function of the elevator is stopped. , Stop the ascent and descent of the car 70. In FIG. 4, since the number of workers and the number of hooks in use are the same, the hook detection device 20 does not enter the warning state. In FIG. 5, since the number of workers is larger than the number of hooks in the used state, the hook detection device 20 is in the warning state. Since the hook detection device 20 utilizes the image pickup device 10, it is not necessary to process it on the hook side, and the position where the hook is hooked is not limited. With such a simple configuration, when there is an operator who does not hang the safety belt hook when working on the elevator car, the hook detection device 20 controls the operation of the elevator to protect the safety of the operator.

FIG. 6 is a block diagram of the functional configuration of the hook detection device 20. The hook detection device 20 includes an image acquisition unit 21, a worker count unit 22, a hook determination unit 23, a worker detection unit 24, a warning generation unit 25, and an operation instruction unit 26.

FIG. 7 shows the hardware configuration of the hook detection device 20. The hardware configuration of the hook detection device 20 will be described with reference to FIG. 7. The hook detection device 20 is a computer. The hook detection device 20 includes a processor 110 and other hardware such as a main storage device 120, an auxiliary storage device 130, an input IF 140, an output IF 150, and a communication IF 160. The IF indicates an interface. The processor 110 is connected to other hardware via the signal line 170 and controls these other hardware.

The hook detection device 20 includes an image acquisition unit 21, a worker count unit 22, a hook determination unit 23, a worker detection unit 24, a warning generation unit 25, and an operation instruction unit 26 as functional elements. The functions of the image acquisition unit 21, the worker counting unit 22, the hook determination unit 23, the worker detection unit 24, the warning generation unit 25, and the operation instruction unit 26 are realized by the hook detection program 101.

The processor 110 is a device that executes the hook detection program 101. The hook detection program 101 is a program that realizes the functions of the image acquisition unit 21, the worker count unit 22, the hook determination unit 23, the worker detection unit 24, the warning generation unit 25, and the operation instruction unit 26. The processor 110 is an IC (Integrated Circuit) that performs arithmetic processing. Specific examples of the processor 110 are a CPU (Central Processing Unit), a DSP (Digital Signal Processor), and a GPU (Graphics Processing Unit).

The main storage device 120 is a storage device. Specific examples of the main storage device 120 are SRAM (Static Random Access Memory) and DRAM (Dynamic Random Access Memory). The main storage device 120 holds the calculation result of the processor 110.

The auxiliary storage device 130 is a storage device that stores data non-volatilely. A specific example of the auxiliary storage device 130 is an HDD (Hard Disk Drive). The auxiliary storage device 130 is a portable recording medium such as an SD (registered trademark) (Secure Digital) memory card, a NAND flash, a flexible disk, an optical disk, a compact disk, a Blu-ray (registered trademark) disk, or a DVD (Digital Versaille Disk). There may be. The auxiliary storage device 130 stores the hook detection program 101.

The input IF140 is a port to which data is input from each device. The output IF 150 is a port to which various devices are connected and data is output to the various devices by the processor 110. In FIG. 7, a warning device 80 is connected to the outgoing IF 150. The communication IF160 is a communication port for the processor to communicate with other devices. In FIG. 7, the image pickup device 10 and the operation control device 40 are connected to the communication IF 160.

The processor 110 loads the hook detection program 101 from the auxiliary storage device 130 into the main storage device 120, and reads and executes the hook detection program 101 from the main storage device 120. In the main storage device 120, not only the hook detection program 101 but also the OS (Operating System) is stored. The processor 110 executes the hook detection program 101 while executing the OS. The hook detection device 20 may include a plurality of processors that replace the processor 110. These plurality of processors share the execution of the hook detection program 101. Each processor is a device that executes the hook detection program 101 in the same manner as the processor 110. The data, information, signal value and variable value used, processed or output by the hook detection program 101 are stored in the main storage device 120, the auxiliary storage device 130, or the register or cache memory in the processor 110.

The hook detection program 101 "processes", "procedures", or "processes" the "units" of the image acquisition unit 21, the worker count unit 22, the hook determination unit 23, the worker detection unit 24, the warning generation unit 25, and the operation instruction unit 26. It is a program that causes a computer to execute each process, each procedure, or each process read as "process".

Further, the hook detection method is a method performed by the hook detection device 20 which is a computer executes the hook detection program 101. The hook detection program 101 may be provided stored in a computer-readable recording medium, or may be provided as a program product.

*** Explanation of operation ***
The operation of the hook detection device 20 will be described with reference to FIG.
FIG. 8 is a flowchart illustrating the operation of the hook detection device 20. The operation of the hook detection device 20 corresponds to the hook detection method. Further, the operation of the hook detection device 20 corresponds to the processing of the hook detection program 101.

<Step S11>
Hereinafter, FIGS. 4 and 5 will be described as examples. In the image pickup apparatus 10, the image pickup unit 11 photographs an operator wearing a hook, who works on the top plate 1 of the elevator car 70. In the state of FIG. 4 or 5, the imaging unit 11 photographs the worker 50 and the worker 60. In step S11, the image acquisition unit 21 continuously acquires an image from the image pickup unit 11 of the image pickup device 10. The image acquired by the image acquisition unit 21 may be a moving image or a still image. The image acquisition unit 21 outputs the acquired image to the worker counting unit 22 and the hook determination unit 23.

<Step S12>
In step S12, the worker counting unit 22 counts the number of workers captured in the image by analyzing the image. In FIGS. 4 and 5, the worker counting unit 22 counts the number of workers as 2.

<Step S13>
In step S13, the hook determination unit 23 determines the number of hooks in use, which indicates the number of hooks in use, which are hung on the fence 72, which is a member on the top plate 71, by analyzing the image. Regarding FIG. 4, the hook determination unit 23 determines that the number of hooks used is 2. Regarding FIG. 5, the hook determination unit 23 determines that the number of hooks used is 1.

<Step S14>
In step S14, the worker detection unit 24 is a worker who is not using a hook based on the number of workers counted by the worker counting unit 22 and the number of hooks used determined by the hook determination unit 23. Is detected. In FIG. 4, the worker detection unit 24 detects a worker who is not using the hook as 0. In FIG. 5, the worker detection unit 24 detects a worker who is not using the hook as 1.

<Step S15>
In step S15, the worker detection unit 24 determines whether or not the number of unused workers on the hook is zero. In FIG. 8, the operator detection unit 24, which is the main operating body, is clearly shown in step S15. If the number of unused hook workers is 0, the process returns to step S12. In step S11, the image acquisition unit 21 continuously acquires images. If the number of unused hook workers is 1 or more, the process proceeds to step S16. Regarding FIG. 4, the worker detection unit 24 determines that the number of unused workers on the hook is 0. In FIG. 5, the worker detection unit 24 determines that the number of unused hook workers is 1.

<Step S16>
The warning generation unit 25 continuously outputs a warning signal to the operation instruction unit 26 while an unused worker of the hook is detected from the continuously acquired image. That is, while the worker detection unit 24 determines that the number of unused hook workers is 1 or more, the warning generation unit 25 continuously outputs a warning signal to the operation instruction unit 26. Further, the warning generation unit 25 is arranged on the top plate 71, which is a work place, and outputs a warning signal to the warning device 80 (FIGS. 4 and 5) that issues a warning by inputting the warning signal. As a warning, the warning device 80 issues a warning such as sound, light, or vibration to call the operator's attention.

<Step S17>
In step S17, the operation instruction unit 26 determines whether or not the warning signal is continuously output from the warning generation unit 25.

<Step S18>
The operation instruction unit 26 outputs a stop signal instructing the stop of the elevator car 70 to the operation control unit 41 of the operation control device 40 when the continuous output time of the warning signal exceeds the reference time. , The operation control unit 41 stops the operation of the car 70. When the operation control unit 41 receives the stop signal from the operation instruction unit 26, the operation control unit 41 stops the operation of the car 70.

*** Effect of Embodiment 1 ***
(1) According to the hook detection device 20 of the first embodiment, since all the workers on the car 70 cannot operate the car 70 unless the hooks are in use, the safety of the workers can be ensured.
(2) Further, as compared with the conventional case, there is no restriction that the hook to be used needs to be processed, so that the safety of the operator can be ensured with a simple configuration and the cost can be reduced. Further, since there is no restriction on the position where the hook is hooked, the workability of the operator is not impaired.

<Supplement to configuration>
In FIG. 6, the functions of the image acquisition unit 21 to the operation instruction unit 26 are realized by one hook detection device 20. However, the hook detection device 20 may be composed of the image processing device 20A and the warning device 20B. The image processing device 20A includes an image acquisition unit 21, a worker count unit 22, and a hook determination unit 23 among the hook detection devices 20, and the warning device 20B includes a worker detection unit 24 and warning generation units 25 and 026. It may be configured.

Embodiment 2.
The hook detection device 20 of the second embodiment will be described with reference to FIGS. 9 and 10.
FIG. 9 shows the functional configuration of the hook detection device 20 of the second embodiment.
FIG. 10 schematically shows the positions of the car 70 and the weight 92. In FIG. 10, the rope 93 is wound around the sheave 91. A car 70 is connected to one end of the rope 93, and a weight 92 is connected to the other end of the rope 93. There is a worker 50 on the top plate 71 of the basket 70.
The hook detection device 20 of the second embodiment further includes a pre-risk behavior detection unit 28, a dangerous behavior detection unit 29, and a car position acquisition unit 30 with respect to the hook detection device 20 of the first embodiment.
The pre-danger behavior detection unit 28 is a pre-stage behavior detection unit.
When the hook detection device 20 is composed of an image processing device 20A and a warning device 20B, the pre-risk behavior detection unit 28 and the dangerous behavior detection unit 29 are included in the image processing device 20A, and the car position acquisition unit 30 is a warning device. Included in 20B.

The features of the hook detection device 20 of the second embodiment are as follows. The risky behavior detection unit 29 detects the risky behavior of the operator from the image taken by the image pickup device 10, and performs warning and operation control of the car 70 in the same manner as the detection of unused hooks. In addition, the pre-risk behavior detection unit 28 warns when the pre-risk behavior, which is a preliminary pre-danger behavior of the dangerous behavior, is detected. Further, the car position acquisition unit 30 acquires the position of the car 70, and if there is a risk of contact with the weight 92, the operation control unit 41 immediately stops the car 70.

The operation of the hook detection device 20 of the second embodiment is as follows. The risky behavior detection unit 29 detects the risky behavior by the worker from the image. What kind of action is a dangerous action is set in the risky behavior detection unit 29. For example, risky behavior is an act in which a worker leans out from a fence 72. When the dangerous behavior detection unit 29 detects a dangerous behavior by the worker 50, the car position acquisition unit 30 acquires the position of the car 70 from the operation control device 40, and stops the car 70 according to the acquired car position. Is output to the operation control unit 41. When the operation control unit 41 receives the stop signal, the operation of the car 70 is stopped.
The pre-risk behavior detection unit 28 detects the pre-danger behavior, which is the pre-stage of the dangerous behavior by the worker, from the image. Here, the pre-stage action is an action that does not lead to a dangerous action but may lead to a dangerous action. What kind of action becomes the pre-stage action is set in the pre-danger action detection unit 28. If the dangerous behavior is the act of the worker leaning out from the fence 72, the pre-stage behavior is the behavior of the worker moving toward the fence 72. The warning generation unit 25 outputs a warning signal to the operation instruction unit 26 when the pre-danger behavior detection unit 28 detects the previous stage behavior. Similar to the first embodiment, the operation instruction unit 26 instructs the operation control unit 41 to stop the operation of the car 70 when the time for which the warning signal is continuously output from the warning generation unit 25 exceeds the reference time. Outputs a stop signal.

*** Effect of Embodiment 2 ***
The hook detection device 20 of the second embodiment detects the dangerous behavior and the pre-stage behavior of the worker by analyzing the image acquired from the image pickup device 10, and warns or stops the operation of the car 70 according to the detection result. Since this is done, the safety of the operator can be improved.

<Supplement to hardware configuration>
In the hook detection device 20 of the first embodiment and the second embodiment, each functional element is realized by software, but the function of the hook detection device 20 may be realized by hardware.
FIG. 11 shows a configuration in which the function of the hook detection device 20 is realized by hardware. The electronic circuit 98 of FIG. 11 is an image acquisition unit 21, a worker count unit 22, a hook determination unit 23, a worker detection unit 24, a warning generation unit 25, a driving instruction unit 26, and a pre-risk behavior detection of the hook detection device 20. It is a dedicated electronic circuit that realizes the functions of the unit 28, the dangerous behavior detection unit 29, and the car position acquisition unit 30. The electronic circuit 98 is connected to the signal line 99. Specifically, the electronic circuit 98 is a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, a logic IC, a GA, an ASIC, or an FPGA. GA is an abbreviation for Gate Array. ASIC is an abbreviation for Application Specific Integrated Circuit. FPGA is an abbreviation for Field-Programmable Gate Array. The functions of the components of the hook detection device 20 may be realized by one electronic circuit, or may be distributed and realized by a plurality of electronic circuits. Further, some functions of the components of the hook detection device 20 may be realized by an electronic circuit, and the remaining functions may be realized by software.

Each of the processor 110 and the electronic circuit 98 is also called a processing circuit. In the hook detection device 20, the image acquisition unit 21, the worker count unit 22, the hook determination unit 23, the worker detection unit 24, the warning generation unit 25, the operation instruction unit 26, the pre-danger behavior detection unit 28, and the dangerous behavior detection unit 29. And the function of the car position acquisition unit 30 may be realized by the processing circuit.

Although the first and second embodiments of the present invention have been described above, the embodiments may be combined and implemented. Alternatively, one of these embodiments may be partially implemented. Alternatively, these two embodiments may be partially combined and implemented. The present invention is not limited to these embodiments, and various modifications can be made as needed.

10 image pickup device, 11 image pickup section, 20A image processing device, 20B warning device, 20 hook detection device, 21 image acquisition section, 22 worker count section, 23 hook judgment section, 24 worker detection section, 25 warning generator, 26 Driving instruction unit, 28 pre-risk behavior detection unit, 29 dangerous behavior detection unit, 30 car position acquisition unit, 40 operation control device, 41 operation control unit, 50, 60 workers, 50B, 60B safety belt, 51, 61 hooks, 52, 62 wires, 58, 68 microphones, 70 baskets, 71 top plates, 72 fences, 73 car doors, 80 warning devices, 91 sheaves, 92 weights, 93 ropes, 98 electronic circuits, 99 signal lines, 101 hook detection programs.

Claims

An image acquisition unit that continuously acquires images from an image pickup device that captures a worker wearing a hook who works in the workplace.
A worker counting unit that counts the number of workers captured in the image by analyzing the image, and
By analyzing the image, a hook determination unit for determining the number of hooks used indicating the number of the hooks hung on the member arranged in the workplace, and a hook determination unit.
A worker detection unit that detects the worker who is not using the hook based on the counted number of workers and the determined number of hooks used.
A hook detection device including a warning generating unit that outputs a warning signal when the worker who is not using the hook is detected.
The warning generating part is
The hook detection device according to claim 1, wherein the warning signal is output to a warning device that is arranged in the workplace and issues a warning by inputting the warning signal.
The hook detection device further
A pre-stage behavior detection unit that detects a pre-stage behavior that is a pre-stage of a dangerous behavior by the worker from the image is provided.
The warning generating part is
The hook detection device according to claim 1 or 2, which outputs the warning signal when the pre-stage action is detected.
The hook detection device according to any one of claims 1 to 3, wherein the work place is on the top plate of an elevator car.
The warning generating part is
The hook detection device according to claim 4, wherein the warning signal is continuously output while the worker who is not using the hook is detected from the continuously acquired image.
The hook detection device further
When the time for which the warning signal is continuously output exceeds the reference time, an operation instruction for outputting a stop signal instructing the elevator car to stop to the operation control device for controlling the raising and lowering of the elevator car. The hook detection device according to claim 4 or 5, further comprising a unit.
The hook detection device further
From the image, a risky behavior detection unit that detects dangerous behavior by the worker,
When a dangerous behavior by the worker is detected, the position of the car of the elevator is acquired, and a stop signal instructing the stop of the car of the elevator is controlled to raise or lower the car of the elevator according to the acquired position. The hook detection device according to any one of claims 4 to 6, further comprising a car position acquisition unit that outputs to the operation control device.
On the computer
Image acquisition processing that continuously acquires images from an image pickup device that captures a worker wearing a hook who works in the workplace,
A worker counting process that counts the number of workers captured in the image by analyzing the image, and
By analyzing the image, a hook determination process for determining the number of hooks used, which indicates the number of the hooks hung on the member arranged in the workplace, and a hook determination process.
A worker detection process for detecting the worker who is not using the hook based on the counted number of workers and the determined number of hooks used.
A hook detection program that executes a warning generation process that outputs a warning signal when the worker who is not using the hook is detected.
The computer
Images are continuously acquired from an image pickup device that captures a worker wearing a hook who works in the workplace.
By analyzing the image, the number of workers captured in the image is counted.
By analyzing the image, the number of hooks used indicating the number of the hooks hung on the member arranged in the workplace is determined.
Based on the counted number of workers and the determined number of hooks used, the workers who are not using the hooks are detected.
A hook detection method that outputs a warning signal when the worker who is not using the hook is detected.