Risk evaluation system, method for evaluating risk, and program

Abstract

To evaluate a risk 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; energy calculation means for quantitatively calculating energy of the risk source; distance calculation means for calculating the distance between the risk source and a person; and risk evaluation means for evaluating a risk to a person on the basis of the energy of the risk source calculated by the energy calculation means and the distance calculated by the distance calculation 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 risk of contact 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 energy delivered to the human body varies depending on the risk source. The above systems and machine learning methods do not take this into account, and therefore may 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; an energy calculation means for quantitatively calculating the energy of the risk source; distance calculation means for calculating the distance between the risk source and the person; a risk assessment means for assessing a risk to a person based on the energy of the risk source calculated by the energy calculation means and the distance calculated by the distance calculation means when the interference detection means detects interference with a risk range of the person; and A risk assessment system is. In this aspect, The energy calculation means may quantitatively calculate at least one of kinetic energy, potential energy, and thermal energy of the risk source as the energy of the risk source. In this aspect, The risk assessment means As the energy of the risk source calculated by the energy calculation means increases, the risk level to the person is evaluated as being higher; The risk level for the person may be evaluated to be higher as the distance between the risk source and the person calculated by the distance calculation means becomes shorter. 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; Quantitatively calculating the energy of the risk source; Calculating a distance between the risk source and the person; Upon detecting interference with a risk area of the person, assessing a risk to the person based on the calculated energy of the risk source and the calculated distance; Risk assessment methods, including 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 quantitatively calculating the energy of the risk source; A process of calculating a distance between the risk source and the person; When detecting interference with a risk area of the person, assessing the risk to the person based on the calculated energy of the risk source and the calculated distance; A program that causes a computer to execute 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 range. [Figure 4] FIG. 1 is a diagram illustrating an example of kinetic energy and potential energy. [Figure 5] 1 is a flowchart illustrating an example of the flow of a risk assessment method. [Figure 6] This is a diagram in which threshold lines are set for each distance X (m) from the risk source. 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 the person present in an environment set on a three-dimensional simulator, for example. A risk source (hazard) is something that can pose a risk to a person, such as a machine tool, a transport vehicle, a depression, or a heat source. A risk source may, for example, emit dust, heat, shavings, sparks, or the like into the surrounding area. The risk assessment system 1 may also assess the risk of a person with respect to risk sources and the person present in an actual environment in real time.

[0011] 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.

[0012] 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.

[0013] 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 energy calculation unit 3, a distance calculation unit 4, and a risk assessment unit 5.

[0014] 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.

[0015] 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.

[0016] The energy calculation unit 3 is a specific example of an energy calculation means. The energy calculation unit 3 quantitatively calculates the energy of a risk source.

[0017] For example, when the risk source is a moving body such as a transport vehicle, the energy calculation unit 3 calculates the kinetic energy 1 / 2mv of the moving body based on the mass m and moving speed v of the moving body. 2 may be quantitatively calculated as the energy of the risk source.

[0018] When the risk source is a depression, the energy calculation unit 3 may quantitatively calculate potential energy mgh as the energy of the risk source based on the depth h of the depression, the mass m of the worker, and the gravitational acceleration g.

[0019] When the risk source is a heater, the energy calculation unit 3 may quantitatively calculate the thermal energy as the energy of the risk source based on the temperature of the heater.

[0020] The distance calculation unit 4 is a specific example of distance calculation means. The distance calculation unit 4 calculates the distance between a risk source and a person. For example, as shown in Fig. 3, the distance calculation unit 4 may irradiate a light beam from the risk source to a person who has entered a risk range, and calculate the distance between the risk source and the person based on the reflected light beam.

[0021] The risk assessment unit 5 is a specific example of a risk assessment means. When the interference detection unit 2 detects interference with the risk range of a person, the risk assessment unit 5 assesses the risk to the person based on the energy of the risk source calculated by the energy calculation unit 3 and the distance calculated by the distance calculation unit 4.

[0022] The risk assessment unit 5 calculates a risk level of the energy of the risk source based on the energy of the risk source calculated by the energy calculation unit 3. The risk level is an index that indicates the degree of risk. For example, the risk level is set to increase as the energy of the risk source increases.

[0023] As shown in Figure 4(a), if the moving speed of the moving object is 5 km / h and the mass is m, the kinetic energy is 12.5 m, and the risk level is 2. On the other hand, if the moving speed of the moving object is 50 km / h and the mass is m, the kinetic energy is 1250 m, and the risk level is 5.

[0024] Similarly, as shown in Figure 4(b), if the depth of the depression is 0.5 m and the mass is m, the potential energy is 0.5 mg and the risk level is 2. On the other hand, if the depth of the depression is 2 m and the mass is m, the potential energy is 2 mg and the risk level is 4.

[0025] The risk assessment unit 5 may assess the risk to a person by calculating the risk level of the energy of the risk source based on the energy of the risk source calculated by the energy calculation unit 3 as described above.

[0026] Similarly, the risk assessment unit 5 assesses the risk to a person by calculating the risk level of the distance between the risk source and the person based on the distance calculated by the distance calculation unit 4. The risk level is set to increase as the distance between the risk source and the person decreases.

[0027] In addition, the risk assessment unit 5 may assess the risk to a person by calculating an overall risk level by adding the risk level of the energy of the risk source and the risk level of the distance between the risk source and the person.

[0028] 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 a different volume or a warning light with a different color depending on the risk level.

[0029] Furthermore, the risk assessment unit 5 may assess the risk to a person by comparing the energy of the risk source and the distance between the risk source and the person with thresholds, as follows.

[0030] 5 is a flowchart showing an example of the flow of the risk assessment method. If 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.

[0031] 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 energy calculation unit 3 quantitatively calculates the energy of the risk source (step S103).

[0032] Next, the distance calculation unit 4 calculates the distance between the risk source and the person (step S104).

[0033] The risk assessment unit 5 determines whether the energy of the risk source calculated by the energy calculation unit 3 is equal to or greater than the threshold A (step S105).

[0034] When the risk assessment unit 5 determines that the energy of the risk source is equal to or greater than threshold A (YES in step S105), it determines whether the distance between the risk source and the person calculated by the distance calculation unit 4 is equal to or less than threshold B (step S106). Note that thresholds A and B may be set in the risk assessment unit 5 in advance.

[0035] If the risk assessment unit 5 determines that the distance between the risk source and the person is equal to or less than threshold B (YES in step S106), it evaluates the risk level for that person as X1 (step S107). On the other hand, if the risk assessment unit 5 determines that the distance between the risk source and the person is not equal to or less than threshold B (NO in step S106), it evaluates the risk level for that person as X2 (step S108).

[0036] If the risk assessment unit 5 determines that the energy of the risk source is not greater than threshold A (NO in step S105), it determines whether the distance between the risk source and the person calculated by the distance calculation unit 4 is less than threshold B (step S109).

[0037] If the risk assessment unit 5 determines that the distance between the risk source and the person is equal to or less than threshold B (YES in step S109), it assesses the risk level for that person as X3 (step S110). On the other hand, if the risk assessment unit 5 determines that the distance between the risk source and the person is not equal to or less than threshold B (NO in step S109), it assesses the risk level for that person as X4 (step S111). Note that the higher the risk level value, the higher the risk, with X1>X2>X3>X4.

[0038] As described above, the risk assessment system 1 of this embodiment includes an interference detection unit 2 that sets a predetermined range from a risk source that may pose a risk to a person as a risk range and detects when a person interferes with the risk range, an energy calculation unit 3 that quantitatively calculates the energy of the risk source, a distance calculation unit 4 that calculates the distance 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 energy of the risk source calculated by the energy calculation unit 3 and the distance calculated by the distance calculation unit 4.

[0039] According to the risk assessment system 1 of this embodiment, risk assessment can be performed with higher accuracy by taking into consideration the energy of the risk source and the distance between the risk source and a person.

[0040] Embodiment 2 In this embodiment, the risk assessment unit 5 may accumulate the time during which a person has entered the risk range, and calculate the risk level for the accumulated time based on the accumulated time.

[0041] For example, if the time spent in the risk range increases by repeatedly going back and forth around the risk source, the risk increases accordingly. Therefore, the risk level is set to increase as the cumulative time spent in the risk range increases.

[0042] The risk assessment unit 5 may assess the risk to a person by calculating a risk level based on the cumulative time of intrusion into the risk area.

[0043] Furthermore, the risk assessment unit 5 may more accurately assess the risk to a person by calculating an overall risk level by adding the risk level of the energy of the risk source, the risk level of the distance between the risk source and the person, and the risk level of the cumulative time of intrusion into the risk range.

[0044] Embodiment 3 When a risk source generates dust, heat, shavings, sparks, etc., it is thought that the dust, etc. will have an effect on the human body. In addition, the closer a person is to the risk source, the greater the effect will be.

[0045] In this embodiment, a threshold line may be set for each distance X (m) from the risk source, and the risk level may be set higher each time a person approaches beyond the threshold line.

[0046] For example, as shown in Figure 6, the area S1 inside the threshold line R1 at a distance X (m) from the risk source is set to risk level X1. The area S2 inside the threshold line R2 at a distance 2X (m) from the risk source but outside the threshold line R1 is set to risk level X2. The area S3 inside the threshold line R3 at a distance 3X (m) from the risk source but outside the threshold line R2 is set to risk level X3.

[0047] If the risk assessment unit 5 determines that a person has entered area S1, it assesses the risk level for that person as X1. If the risk assessment unit 5 determines that a person has entered area S2, it assesses the risk level for that person as X2. If the risk assessment unit 5 determines that a person has entered area S3, it assesses the risk level for that person as X3.

[0048] Furthermore, if a risk source generates dust or the like, the dust or the like may accumulate in the human body, potentially causing health damage, etc. The risk assessment unit 5 may calculate and assess the amount of dust or the like accumulated in the body for such a risk source.

[0049] For example, the amount of dust dispersed within each of the above areas can be estimated experimentally, and the amount of dust accumulated in the bodies of people in each of the above areas can be estimated and modeled from that amount of dust dispersed. The risk assessment unit 5 may calculate the amount of dust accumulated in the bodies of people in each of the above areas based on such a model, and assess the risk to those people based on the calculated amount of dust accumulated in the bodies.

[0050] Although several 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 embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims.

[0051] The present disclosure can also be implemented by causing a processor to execute a computer program to perform the processing shown in FIG. 5, for example.

[0052] 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)).

[0053] 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.

[0054] 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]

[0055] 1 Risk assessment system, 2 Interference detection unit, 3 Energy calculation unit, 4 Distance calculation 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; an energy calculation means for quantitatively calculating the energy of the risk source; distance calculation means for calculating the distance between the risk source and the person; a risk assessment means for assessing a risk to a person based on the energy of the risk source calculated by the energy calculation means and the distance calculated by the distance calculation means when the interference detection means detects interference with a risk range of the person; and A risk assessment system comprising:

2. 2. The risk assessment system according to claim 1, The energy calculation means quantitatively calculates at least one of kinetic energy, potential energy, and thermal energy of the risk source as the energy of the risk source. Risk assessment system.

3. 2. The risk assessment system according to claim 1, The risk assessment means As the energy of the risk source calculated by the energy calculation means increases, the risk level to the person is evaluated as being higher; As the distance between the risk source and the person calculated by the distance calculation means becomes shorter, the risk level to the person is evaluated as being higher. 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; Quantitatively calculating the energy of the risk source; Calculating a distance between the risk source and the person; Upon detecting interference with a risk area of the person, assessing a risk to the person based on the calculated energy of the risk source and the calculated distance; Risk assessment methods, including:

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 quantitatively calculating the energy of the risk source; A process of calculating a distance between the risk source and the person; When detecting interference with a risk area of the person, assessing the risk to the person based on the calculated energy of the risk source and the calculated distance; A program that causes a computer to execute the following.

Images