Risk evaluation system, method for evaluating risk, and program

Abstract

To evaluate a risk more accurately.SOLUTION: A risk evaluation system includes: interference detection means for setting a predetermined range as a risk range from a risk source that can generate a risk to a person and detecting a person who has interfered with the risk range; equipment detection means for detecting the state of equipment of the person; shield object detection means for detecting a shield object between the risk source and the person; and risk evaluation means for evaluating the risk to the person on the basis of the state of equipment of the person detected by the equipment detection means and the shield object detected by the shield detection means if the interference detection means detects a person who has interfered with the risk range.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a risk assessment system, a risk assessment method, and a program for assessing risk. [Background technology]

[0002] BACKGROUND ART A system is known that issues an alert to a person when the person approaches a risk object that may pose a contact risk to the person (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-22867 Summary of the Invention [Problem to be solved by the invention]

[0004] The risk level varies depending on the person's equipment status and the obstacles between the person and the risk source. The above systems and machine learning methods do not take this into account, so there is a risk that they will not be able to perform risk assessments with high accuracy.

[0005] The present disclosure has been made to solve such problems, and its main purpose is to provide a risk assessment system, a risk assessment method, and a program that can perform risk assessment with higher accuracy. [Means for solving the problem]

[0006] In order to achieve the above object, one aspect of the present disclosure is to an interference detection means for setting a predetermined range from a risk source that may cause a risk to a person as a risk range and detecting when the person interferes with the risk range; equipment detection means for detecting the equipment state of the person; an obstacle detection means for detecting an obstacle between the risk source and the person; a risk assessment means for assessing the risk of a person based on the equipment state of the person detected by the equipment detection means and the obstruction detected by the obstruction detection means when the interference detection means detects interference with a risk range of the person; and Equipped with Risk Assessment System is. In this aspect, The risk assessment means may reduce the risk level for a person when it determines that the person is wearing predetermined equipment based on the equipment state of the person detected by the equipment detection means. In this aspect, The risk assessment means may determine whether the equipment of the person detected by the equipment detection means corresponds to the risk source based on table information linking the risk source with specified equipment, and if it is determined that the equipment corresponds, reduce the risk level for the person. In this aspect, The risk assessment means may reduce a risk level for the person based on the size of an opening of a gap in the obstruction detected by the obstruction detection means. In this aspect, The risk assessment means may reduce the risk level to the person depending on the degree to which a light beam emitted toward the shielding object and having a diameter corresponding to a part of the person's body penetrates through a gap in the shielding object. In this aspect, The risk assessment means may reduce the risk level to the person based on at least one of the height, mass, width, surface area, and thickness of the obstruction detected by the obstruction detection means. In order to achieve the above object, one aspect of the present disclosure is to a step of setting a predetermined range from a risk source that may cause a risk to a person as a risk range, and detecting that the person has interfered with the risk range; detecting an equipment state of the person; detecting an obstruction between the risk source and the person; Upon detecting interference with the risk area of the person, assessing the risk of the person based on the detected equipment status of the person and the detected obstruction; Including, Risk Assessment Methodology is. In order to achieve the above object, one aspect of the present disclosure is to A process of setting a predetermined range from a risk source that may cause a risk to a person as a risk range and detecting that the person has interfered with the risk range; A process of detecting an equipment state of the person; A process of detecting an obstruction between the risk source and the person; When detecting interference with the risk range of the person, a process of assessing the risk of the person based on the detected equipment state of the person and the detected obstruction; to the computer, program is. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a risk assessment system, a risk assessment method, and a program that can perform risk assessment with higher accuracy. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a block diagram showing a schematic hardware configuration of a risk assessment system according to an embodiment of the present invention. [Figure 2] 1 is a block diagram showing a schematic system configuration of a risk assessment system according to an embodiment of the present invention. [Figure 3] FIG. 10 is a diagram illustrating an example of a risk area and an obstruction. [Figure 4] 1 is a flowchart illustrating an example of the flow of a risk assessment method. DETAILED DESCRIPTION OF THE INVENTION

[0009] Embodiment 1 The present embodiment will be described below with reference to the drawings: Fig. 1 is a block diagram showing a schematic hardware configuration of a risk assessment system according to the present embodiment.

[0010] The risk assessment system 1 according to this embodiment assesses the risk of a person with respect to risk sources and people present in an environment set on a three-dimensional simulator, for example. Risk sources (hazards) are things that can pose a risk to people, such as machine tools, transport vehicles, depressions, and heat sources.

[0011] The risk source may, for example, emit dust, heat, chips, sparks, etc. The risk assessment system 1 may also assess the risk of a person with respect to risk sources and people present in an actual environment.

[0012] The environment includes any place where risk sources and people exist, such as a factory, construction site, warehouse, facility, school, shop, restaurant, etc. The people include not only workers in a factory or construction site, but also any person present in the environment.

[0013] As shown in FIG. 1, the risk assessment system 1 has a typical computer hardware configuration including a processor 11 such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit), an internal memory 12 such as a RAM (Random Access Memory) or a ROM (Read Only Memory), a storage device 13 such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive), an input / output I / F 14 for connecting peripheral devices such as a display, and a communication I / F 15 for communicating with devices external to the device.

[0014] 2 is a block diagram showing a schematic system configuration of a risk assessment system according to this embodiment. The risk assessment system 1 according to this embodiment includes an interference detection unit 2, an equipment detection unit 3, an obstruction detection unit 4, and a risk assessment unit 5.

[0015] The interference detection unit 2 is a specific example of an interference detection means. When a person enters a risk range, the interference detection unit 2 detects that the person has interfered with the risk range. For example, as shown in Fig. 3, a predetermined range from a risk source that may pose a risk to a person is set as the risk range.

[0016] The predetermined range is set in advance in, for example, the interference detection unit 2. The interference detection unit 2 can detect that a person has interfered with the risk range, for example, based on an image of the person and the risk source captured by a camera.

[0017] The equipment detection unit 3 is a specific example of equipment detection means. The equipment detection unit 3 detects the equipment state of a person. The above equipment state refers to a state in which a person is wearing protective equipment such as gloves, a harness, a mask (gas mask, dust mask, etc.), safety shoes, protective clothing, etc. The equipment detection unit 3 can detect the protective equipment worn by a person, for example, based on an image of the person captured by a camera.

[0018] The shielding object detection unit 4 is a specific example of a shielding object detection means. As shown in Fig. 3, the shielding object detection unit 4 detects a shielding object between a risk source and a person. The shielding object exists on a straight line connecting the risk source and the person. The shielding object is installed, for example, to prevent contact between the person and the risk source, or to protect the person from flying debris from the risk source.

[0019] Examples of the obstruction include a protective block, a protective net, a protective wall, and a protective plate. The obstruction detection unit 4 detects an obstruction between a risk source and a person by, for example, emitting a light beam from the risk source toward the person, or from the person toward the risk source. The obstruction detection unit 4 may also detect the obstruction based on an image of the obstruction captured by a camera.

[0020] The risk assessment unit 5 is a specific example of a risk assessment means. The risk assessment unit 5 assesses the risk to a person. First, when the interference detection unit 2 detects interference with the person's risk range, the risk assessment unit 5 determines that the person is approaching a risk source and that there is a risk to the person. Then, the risk assessment unit 5 assesses the risk to the person based on the equipment state of the person detected by the equipment detection unit 3 and the obstruction detected by the obstruction detection unit 4.

[0021] If the risk assessment unit 5 determines, for example, that a person is wearing specified equipment and is wearing appropriate equipment based on the equipment status of the person detected by the equipment detection unit 3, it reduces the risk level for that person by a specified level below the standard risk level.

[0022] It should be noted that the higher the risk level, the greater the danger, and conversely, the lower the risk level, the greater the safety. The standard risk level is a risk level set when a person is not wearing the specified equipment. The standard risk level may be set in advance taking into account risk sources, etc. The standard level and the specified level may be set in advance in the risk assessment unit 5, etc.

[0023] For example, if the specified equipment is gloves, and the risk assessment unit 5 determines that the person is wearing gloves based on the equipment status of the person detected by the equipment detection unit 3, it reduces the risk level for that person to 3, which is lower than the standard risk level of 5.

[0024] Table information linking risk sources with predetermined equipment may be set in the risk assessment unit 5. For example, a harness, which is predetermined equipment, is linked to a recess, which is a risk source, and a helmet, which is predetermined equipment, is linked to a machine tool, which is a risk source.

[0025] The risk assessment unit 5 determines whether the equipment of the person detected by the equipment detection unit 3 corresponds to a risk source based on the table information. When the risk assessment unit 5 determines that the equipment of the person detected by the equipment detection unit 3 corresponds to a risk source, it may determine that the person is wearing appropriate equipment and reduce the risk level for that person.

[0026] In this way, the risk assessment unit 5 assesses the risk of a person by reducing the risk level of the person in accordance with the equipment state of the person detected by the equipment detection unit 3.

[0027] Furthermore, the risk assessment unit 5 may reduce the risk level to a person depending on the obstruction detected by the obstruction detection unit 4.

[0028] For example, the risk assessment unit 5 reduces the risk level to a person when it determines that the size of the opening of the gap in the shielding object detected by the shielding object detection unit 4 is equal to or smaller than a threshold. Here, the size of the opening of the gap in the shielding object refers to, for example, the maximum opening width.

[0029] This is because if the opening of a gap in a shielding object is determined to be small and below the threshold, the risk of a person's fingers or hands passing through the gap in the shielding object and coming into contact with a risk source, or the risk of debris from the risk source passing through the gap in the shielding object and reaching a person, is reduced.

[0030] The risk assessment unit 5 may reduce the risk level to a person as the size of the opening of the gap in the shielding object detected by the shielding object detection unit 4 decreases. The risk assessment unit 5 can detect the size of the opening of the gap in the shielding object, for example, based on an image of the gap in the shielding object captured by a camera.

[0031] The risk assessment unit 5 may reduce the risk level to a person depending on the degree to which the light beam emitted toward the shield penetrates through gaps in the shield.

[0032] The diameter of the light beam may be the diameter of a body part that may pass through gaps such as a person's finger, arm, torso, etc. The light source unit emits a light beam, for example, from the risk source toward the person or from the person toward the risk source.

[0033] If a light beam emitted toward an obstructing object is partially lost due to a gap in the obstructing object and does not completely penetrate, the risk assessment unit 5 determines that the gap in the obstructing object is smaller than the diameter of the light beam. In this case, since it is unlikely that a part of the person's body will pass through the gap in the obstructing object, the risk assessment unit 5 reduces the risk level for that person by a predetermined level. In this way, the risk assessment unit 5 assesses the risk of that person by reducing the person's risk level according to the size of the gap in the obstructing object detected by the obstructing object detection unit 4.

[0034] Note that the above risk assessment method is an example and is not limited to this. For example, in the above embodiment, the risk assessment unit 5 reduces the risk level of a person in accordance with the equipment state of the person detected by the equipment detection unit 3, and then reduces the risk level of the person in accordance with the size of the gap in the obstruction detected by the obstruction detection unit 4. However, the risk assessment unit 5 may reduce the risk level of a person in accordance with the equipment state of the person detected by the equipment detection unit 3, after reducing the risk level of the person in accordance with the size of the gap in the obstruction detected by the obstruction detection unit 4.

[0035] The risk assessment unit 5 may output the calculated risk level for the person to the user. For example, the risk assessment unit 5 may display the risk level on a display device, or may output a warning sound with different volume or tone, or output a warning light with different color or light intensity, depending on the risk level.

[0036] 4 is a flowchart showing an example of the flow of the risk assessment method. When the interference detection unit 2 does not detect that a person has interfered with the risk range (NO in step S101), it determines that the person is safe (step S102) and ends this process.

[0037] On the other hand, if the interference detection unit 2 detects that a person has interfered with the risk range (YES in step S101), the equipment detection unit 3 detects the equipment state of the person (step S103).

[0038] The obstruction detection unit 4 detects an obstruction between the risk source and the person (step S104). The risk assessment unit 5 assesses the risk of the person based on the equipment state of the person detected by the equipment detection unit 3 and the size of the gap in the obstacle detected by the obstacle detection unit 4 (step S105).

[0039] In the above flow, the equipment detection unit 3 detects the equipment state of the person, and then the shielding object detection unit 4 detects an shield between the risk source and the person, but this is not limiting. After the shielding object detection unit 4 detects an shield between the risk source and the person, the equipment detection unit 3 may detect the equipment state of the person, or the shielding object detection unit 4 and the equipment detection unit 3 may simultaneously detect the shield and the equipment state.

[0040] As described above, the risk assessment system 1 of this embodiment sets a predetermined range from a risk source that may pose a risk to a person as a risk range, and is equipped with an interference detection unit 2 that detects when a person interferes with the risk range, an equipment detection unit 3 that detects the equipment status of the person, an obstruction detection unit 4 that detects obstructions between the risk source and the person, and a risk assessment unit 5 that, when the interference detection unit 2 detects interference with the person's risk range, evaluates the risk to the person based on the equipment status of the person detected by the equipment detection unit 3 and the obstruction detected by the obstruction detection unit 4.

[0041] According to the risk assessment system 1 of this embodiment, risk assessment can be performed with high accuracy by taking into account the state of equipment of the person and any obstructions between the risk source and the person.

[0042] Embodiment 2 In this embodiment, the risk assessment unit 5 may reduce the risk level for the person in accordance with the height of the obstruction detected by the obstruction detection unit 4. This allows for more accurate assessment of the risk.

[0043] A high shielding structure poses a lower risk to the person and is therefore safer than a low shielding structure, because a high shielding structure reduces the risk of debris from a risk source reaching the person beyond the shielding structure.

[0044] For example, if the height h1 of the obstruction detected by the obstruction detection unit 4 is greater than the height h2 of the risk source (h1>h2), the risk assessment unit 5 may reduce the risk level for the person by a predetermined level. Note that the risk assessment unit 5 may reduce the risk level for the person to a greater extent as the height h1 of the obstruction detected by the obstruction detection unit 4 increases.

[0045] Similarly, the risk assessment unit 5 may reduce the risk level for the person depending on at least one of the mass, width, surface area, and thickness of the obstructing object detected by the obstructing object detection unit 4.

[0046] For example, the risk assessment unit 5 may decrease the risk level for a person as the mass, width, surface area, and thickness of the obstructing object detected by the obstructing object detection unit 4 increase.

[0047] Furthermore, the risk assessment unit 5 may increase the risk level for the person when it is determined that the mass of the obstruction detected by the obstruction detection unit 4 is less than the threshold value M. If the mass of the obstruction is small, the risk to the person increases compared to when the mass is large. This is because, for example, if the mass of the obstruction is small, and a risk source such as a conveyance vehicle moves and collides with the obstruction, the obstruction moves, increasing the risk to the person.

[0048] For example, when a risk source collides with a shield, if the change in motion Δp of the risk source is greater than the static friction force μN between the shield and the ground (Δp>μN), the shield will move. Here, N is the mass of the shield, and the amount of change in the motion of the risk source is Δp = mΔv. m is the mass of the risk source, and Δv is the amount of change in the velocity of the risk source.

[0049] Therefore, when the risk source and the shield collide, whether the shield moves or not is determined by the mass m of the risk source, the amount of change in the velocity Δv of the risk source, the mass N of the shield, and the value of the coefficient of static friction μ between the ground and the shield.

[0050] When the amount of change in the motion Δp of the risk source and the coefficient of static friction μ are fixed values, when the mass N of the shield is less than the threshold value M (N < M), the risk level increases due to the movement of the shield. Therefore, as described above, when the risk evaluation unit 5 determines that the mass of the shield detected by the shield detection unit 4 is less than the threshold value M, the risk level for that person may be increased.

[0051] Although some embodiments of the present disclosure have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and its equivalent scope.

[0052] The present disclosure can also be realized, for example, by causing a processor to execute a computer program for the processing shown in FIG. 4.

[0053] The program can be stored and supplied to a computer using various types of non-transitory computer readable media. Non-transitory computer readable media include various types of tangible storage media. Examples of 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)).

[0054] The program may be provided to the computer by various types of transitory computer-readable media. Examples of transitory computer-readable media include electrical signals, optical signals, and electromagnetic waves. The transitory computer-readable media can provide the program to the computer via a wired communication path such as an electrical wire or optical fiber, or via a wireless communication path.

[0055] Each component of the risk assessment system 1 according to the above-described embodiment can be realized not only by a program, but also in part or in whole by dedicated hardware such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field-Programmable Gate Array). [Explanation of symbols]

[0056] 1 Risk assessment system, 2 Interference detection unit, 3 Equipment detection unit, 4 Obstacle detection unit, 5 Risk assessment unit

Claims

1. an interference detection means for setting a predetermined range from a risk source that may cause a risk to a person as a risk range and detecting when the person interferes with the risk range; equipment detection means for detecting the equipment state of the person; an obstacle detection means for detecting an obstacle between the risk source and the person; a risk assessment means for assessing the risk of a person based on the equipment state of the person detected by the equipment detection means and the obstruction detected by the obstruction detection means when the interference detection means detects interference with a risk range of the person; and Equipped with Risk assessment system.

2. 2. The risk assessment system according to claim 1, When the risk assessment means determines that the person is wearing predetermined equipment based on the equipment state of the person detected by the equipment detection means, the risk assessment means reduces the risk level for the person. Risk assessment system.

3. 2. The risk assessment system according to claim 1, The risk assessment means reduces a risk level to the person based on the size of an opening of a gap in the obstruction detected by the obstruction detection means. Risk assessment system.

4. a step of setting a predetermined range from a risk source that may cause a risk to a person as a risk range, and detecting that the person has interfered with the risk range; detecting an equipment state of the person; detecting an obstruction between the risk source and the person; Upon detecting interference with the risk area of the person, assessing the risk of the person based on the detected equipment status of the person and the detected obstruction; Including, Risk assessment methods.

5. A process of setting a predetermined range from a risk source that may cause a risk to a person as a risk range and detecting that the person has interfered with the risk range; A process of detecting an equipment state of the person; A process of detecting an obstruction between the risk source and the person; When detecting interference with the risk range of the person, a process of assessing the risk of the person based on the detected equipment state of the person and the detected obstruction; to the computer, program.

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