Risk evaluation system

Abstract

To provide a risk evaluation system which can evaluate a work risk in a long work period.SOLUTION: The risk evaluation system sets a certain range around a risk object likely to pose a contact risk to a worker, as a risk range and calculates a cumulative value of periods which are included in a preliminarily determined set period and in which the worker intervenes in the risk range, and evaluates a risk level of work to the worker in the set period on the basis of a calculation result. The risk evaluation system may use machine learning to perform processing mentioned above.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a risk assessment system. [Background technology]

[0002] Patent Document 1 discloses a system that issues an alert to a worker when the worker approaches a risk object that may pose a contact risk to the worker. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-22867 A Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Document 1 detects risk only at a specific timing, but there is a problem in that it does not know to what extent a worker was exposed to risk over the entire work period, which has a certain range. [Means for solving the problem]

[0005] In one embodiment, the risk assessment system sets a certain range from risk objects that may pose a contact risk to a worker as a risk range, calculates the accumulated value of the worker's interference period within the risk range included in a predetermined set period, and evaluates the worker's work risk during the set period based on the calculation result. Effect of the Invention

[0006] The risk assessment system disclosed herein makes it possible to assess work risks over a wide range of work periods. [Brief description of the drawings]

[0007] [Figure 1]2 is a flowchart showing an example of a risk assessment system according to the present embodiment. [Diagram 2] 1 is a schematic diagram showing an overlapping state. [Diagram 3] 1 is a schematic diagram showing an example of a risk display. [Figure 4] 1 is a graph showing the relationship between risk and exposure. [Diagram 5] 1 is a schematic diagram showing an example of a risk area. [Figure 6] 1 is a schematic diagram showing an example of human movement taking into account the distribution of risk presence; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] This embodiment DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. Fig. 1 is a flowchart showing an example of a risk assessment system according to the present embodiment.

[0009] First, in step S101, IDs are assigned to people and hazards, respectively, and the process proceeds to step S102.

[0010] In step S102, it is determined whether the position of the person overlaps with the range of the risk area including the hazard. Fig. 2 is a schematic diagram showing an overlap state. In Fig. 2, a risk area 202 is set around a hazard 201. Here, the position of a worker 203 overlaps with the range of the risk area 202. On the other hand, the position of a worker 204 does not overlap with the range of the risk area 202. If the position of the person overlaps with the range of the risk area including the hazard, proceed to step S103. If the position of the person does not overlap with the range of the risk area including the hazard, proceed to step S107.

[0011] In step S103, it is determined whether the hazard is a moving object. If the hazard is a moving object, the process proceeds to step S104. If the hazard is not a moving object, the process proceeds to step S109.

[0012] In step S104, it is determined whether or not the moving object is moving. If the moving object is moving, the process proceeds to step S105. If the moving object is not moving, the process proceeds to step S109.

[0013] In step S105, the current state is determined to be a dangerous state. In the dangerous state, the exposure time as a risk is accumulated. Then, the process proceeds to step S106.

[0014] In step S106, it is determined whether the risk area including the person's position and the hazard has ended overlapping. If the overlap has ended, the process proceeds to step S107. If the overlap has not ended, the process returns to step S105.

[0015] In step S107, the exposure time is output, and the process proceeds to step S108.

[0016] In step S108, the current state is determined to be a safe state. Therefore, in the safe state, the exposure time as a risk is not accumulated. Then, the series of processes ends.

[0017] In step S109, the current state is determined to be a reserved state. In the reserved state, the exposure time as a risk is not accumulated. Then, the process proceeds to step S110.

[0018] In step S110, it is determined whether the risk area including the person's position and the hazard has ended overlapping. If the overlap has ended, the process proceeds to step S108. If the overlap has not ended, the process proceeds to step S111.

[0019] In step S111, it is determined whether or not the moving object is moving. If the moving object is moving, the process proceeds to step S105. If the moving object is not moving, the process returns to step S109.

[0020] The risk assessment is carried out by the above method. Specifically, the risk assessment is carried out by using the following method and computing device. A method of identifying and detecting the danger zone surrounding the hazard and the worker in a 3D simulator -How to specify the size and shape of the risk area according to the type of hazard -How to avoid risk determination even when people and risk sources overlap (For example, if a hazard source such as a vehicle is moving, it will not be judged as a hazard if it is not moving.) - A calculation device that accumulates the time spent in the area

[0021] It is also possible to provide a chattering prevention function for the overlap between the risk area and the worker. For example, at the moment when the worker overlaps with the risk area, the overlap may fluctuate, so this can be improved by adding a chattering prevention function. Specifically, the chattering prevention method is a method in which a certain time is set from the moment when the worker overlaps with the risk area, and a risk judgment is made after the time has elapsed.

[0022] It is also possible to display the risks to which workers are exposed during the simulation. For example, the risks can be displayed in association with the workers, and the timing of exposure to the risks during the simulation can be displayed, allowing the risks to be understood in a 3D space. Figure 3 is a schematic diagram showing an example of risk display.

[0023] In Figure 3, the worker is shown from behind in a third-person perspective, and the details of the risk are displayed above the worker.

[0024] Then, by displaying the integrated results in a graph, it is possible to assess the risks from an overall perspective and take measures. Figure 4 is a graph showing the relationship between risk and exposure. In the upper graph of Figure 4, the vertical axis shows the severity of the disaster, and the horizontal axis shows time. In the graph at the bottom left of Figure 4, the vertical axis shows the exposure time by risk area, and the horizontal axis shows the risk area. In the graph at the bottom right of Figure 4, the vertical axis shows the number of exposures by risk area, and the horizontal axis shows the risk area.

[0025] For example, during a certain period of time, worker A is exposed to multiple risks, so the countermeasure is to change the work order. Since the frequency of exposure to this hazard is high, it is determined that countermeasures against the hazard should be implemented. Since the cumulative exposure time exceeds a certain value, it is considered to reduce the usage time (e.g., vibrating tools).

[0026] In this manner, the risk assessment system of this embodiment can perform risk judgment in response to the simulated, moment-to-moment changes in the movements of hazard sources and workers.

[0027] Furthermore, according to the risk assessment system of this embodiment, the risk area for risk assessment can be freely specified by the user, so that a more specific risk assessment can be made for a hazard source.

[0028] Furthermore, according to the risk assessment system of this embodiment, the amount of time that a worker is exposed to a certain hazard is accumulated over time, making it possible to calculate a more quantitative exposure frequency rather than an estimate based on human perception.

[0029] Furthermore, according to the risk assessment system of this embodiment, the assessment can be performed on a 3D simulator, making it easy to assess risks between multiple hazards and multiple workers.

[0030] For example, a quantitative risk assessment can be made so that the worker's work danger level increases each time an event occurs, such as repeatedly going back and forth around the risk object or approaching multiple risk objects.

[0031] The present invention is not limited to the above embodiment, and can be modified as appropriate without departing from the spirit of the present invention. For example, multiple risks may be set for one hazard. FIG. 5 is a schematic diagram showing an example of a risk area. As shown in the schematic diagram at the top of FIG. 5, multiple risks (i.e., risk A and risk B) can be set in a risk area for one hazard. As shown in the schematic diagram at the bottom of FIG. 5, multiple risk areas (i.e., risk area A and risk area B) may be set for one hazard.

[0032] In addition, by having workers perform multiple work patterns, a risk distribution can be created that matches the movement of hazards. Figure 6 is a schematic diagram showing an example of human movement that takes into account the risk distribution. By utilizing the risk distribution, it is possible to reconsider the placement of hazards and the movement of workers, as shown in Figure 6, and to propose work with fewer risks.

[0033] In addition, by simulating dangerous tasks, workers can be made aware of the dangers of such tasks. For example, by simulating dangerous tasks such as working near moving machinery, using vibrating tools for long periods of time, working near a heat source, etc., workers can be made aware of the dangers of such tasks.

[0034] Each element depicted in the drawings as a flowchart performing various processes can be configured in hardware with a CPU, memory, and other circuits, and can be realized in software with a program loaded into memory, etc. Therefore, it will be understood by those skilled in the art that these functional blocks can be realized in various forms using only hardware, only software, or a combination thereof, and is not limited to any of them.

[0035] The above-mentioned program can be stored and provided to a computer using various types of non-transitory computer-readable media. The non-transitory computer-readable media includes various types of tangible recording media. Examples of the non-transitory computer-readable media include magnetic recording media (e.g., flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (e.g., magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-R / Ws, and semiconductor memories (e.g., mask ROMs, PROMs (Programmable ROMs), EPROMs (Erasable PROMs), flash ROMs, and RAMs (Random Access Memory)). The program may also be provided to a computer by various types of temporary computer-readable media. Examples of the temporary computer-readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable media can provide the program to a computer via a wired communication path such as an electric wire and an optical fiber, or via a wireless communication path.

[0036] For example, the process of the flowchart in Fig. 1 may be divided and distributed to a server or cloud computing. Also, the risk assessment system may perform the above process using machine learning.

Claims

[Claim 1] A certain range is set as a risk range from risk objects that may cause contact risk for workers, Calculating an accumulated value of the interference period of the worker with respect to the risk range included in a predetermined set period; A risk assessment system that assesses the worker's work risk during the set period based on the calculation results.

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