Dangerous spot warning system, warning device, dangerous spot registration device, dangerous spot warning method and program

Abstract

To provide a dangerous spot warning system capable of effectively issuing appropriate warning corresponding to various kinds of dangerous spots depending on recognition states of workers about the dangerous spots.SOLUTION: In a case where a worker H approaching a dangerous spot DS is a "newly entering person" with a low experience level about the dangerous spot DS, a warning is immediately issued to the worker Hm who is the "newly entering person", by warning sound WS and warning vibration WV corresponding to the kind of the dangerous spot DS. The other workers H around a job site are also notified and warned of the existence of the worker H, who is the "newly entering person" approaching the dangerous spot DS, by flickering a warning LED 13b. Even in a case where the worker H approaching the dangerous spot DS has a high experience level about the dangerous spot DS and is not the "newly entering person", if the worker is a "careless person" who is not watching the dangerous spot DS, a warning is immediately issued to the worker H, who is the "careless person", by the warning sound WS and the warning vibration WV corresponding to the kind of the dangerous spot DS and the warning LED 13b is flickered.SELECTED DRAWING: Figure 2B

Description

[Technical Field]

[0001] An embodiment of the present invention relates to a dangerous spot warning system, a warning device, a dangerous spot registration device, a dangerous spot warning method, and a program. [Background technology]

[0002] Factory facilities such as water treatment facilities and power facilities, as well as their construction sites, have a wide variety of dangerous areas, such as openings, protrusions, live parts, etc. Safety measures must be taken for these dangerous areas.

[0003] For example, safety measures for openings include safety education for workers entering the site, clearly indicating openings that are dangerous areas, and the use of fall prevention equipment (work safety harnesses).

[0004] However, safety training and safety measures that clearly indicate dangerous areas may become accustomed to them over a long period of time, and may no longer be effective as safety measures. Also, even if the use of fall arrest equipment is thoroughly implemented during daily morning meetings at the work site, there are many cases where workers are put in danger because they are not used correctly due to omissions or other reasons.

[0005] Specifically, conventional safety measures to prevent falls from openings include automatic warning devices and work safety belts that warn if fall arrest equipment is not being used correctly (see Patent Document 1), and automatic warning generation devices that continuously issue warnings to workers who approach dangerous areas (see Patent Document 2). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 11-267237 [Patent Document 2] Japanese Utility Model Application Publication No. 64-10896 [Patent Document 3] Patent Publication No. 2021-92521 [Patent Document 4] Special Publication No. 2016-512626 [Patent Document 5] Special Publication No. 9-504120 Summary of the Invention [Problem to be solved by the invention]

[0007] Conventional automatic warning devices and work safety belts are not only limited to use in dangerous locations where there is a risk of falling, but also cannot avoid the risk of danger to workers who do not have fall arrest equipment or who do not use it correctly.

[0008] Conventional automatic warning devices issue continuous warnings to any worker who approaches a dangerous area, which not only leads to workers becoming accustomed to the warnings but also may hinder the work of workers who have already recognized the dangerous area and are taking action to avoid the danger.

[0009] Furthermore, in a site with a wide variety of dangerous locations such as openings, protrusions, and live parts, limiting the scope of warnings does not effectively reduce the risk of damage to the entire site.

[0010] The problem to be solved by the present invention is to provide a hazardous area warning system, warning device, hazardous area registration device, hazardous area warning method, and program that can effectively issue appropriate warnings for a wide variety of hazardous areas in accordance with the worker's awareness of the hazardous areas. [Means for solving the problem]

[0011] The hazardous location warning system of the embodiment includes a hazardous location registration device and a warning device that has a wireless communication function with the hazardous location registration device and is worn on the head of a worker, The dangerous spot registration device a new entrant information generating unit that generates new entrant information according to the worker's level of experience with dangerous places, based on the worker's identification information received from the warning device; an information transmitting unit that transmits the new entrant information and dangerous spot warning information including warning content corresponding to the dangerous spot to the warning device, The warning device a worker identification information transmitting unit that transmits the worker identification information to the danger spot registration device; a viewpoint acquisition unit that acquires the viewpoint of the worker; a new entrant determination unit that determines whether the worker is a new entrant whose experience level with respect to the hazardous location is lower than a preset experience level, based on the new entrant information of the worker received from the hazardous location registration device; a danger spot visual determination unit that determines whether the worker has visually observed the danger spot based on the worker's viewpoint; The apparatus is provided with a warning unit that issues a warning with warning content according to the type of the dangerous spot based on the dangerous spot warning information received from the dangerous spot registration device when the worker is determined to be a new entrant and when the worker is determined not to be a new entrant but has not visually observed the dangerous spot. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is an external view showing the overall configuration of a dangerous spot warning system 1 according to an embodiment. [Figure 2A] FIG. 1 is an external view (part 1) showing an example of use of the danger spot warning system 1 in a danger spot DS. [Figure 2B] FIG. 2 is an external view (part 2) showing an example of using the danger spot warning system 1 in a danger spot DS. [Figure 2C] FIG. 3 is an external view (part 3) showing an example of using the danger spot warning system 1 in a danger spot DS. [Figure 2D] FIG. 4 is an external view (part 4) showing an example of using the danger spot warning system 1 in a danger spot DS. [Figure 3] FIG. 2 is a block diagram showing the configuration of an electronic circuit of the warning device 20. [Figure 4] FIG. 2 is a block diagram showing the configuration of an electronic circuit of the hazardous location registration device 30. [Figure 5] 4 is a flowchart showing a warning process executed by the warning device 20 of the dangerous spot warning system 1 and a dangerous spot notification process executed by the dangerous spot registration device 30. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, a dangerous spot warning system, a warning device, a dangerous spot registration device, a dangerous spot warning method, and a program according to embodiments will be described with reference to the drawings.

[0014] <Configuration of Hazardous Area Warning System 1> FIG. 1 is an external view showing the overall configuration of a dangerous spot warning system 1 according to an embodiment.

[0015] FIG. 2A is an external view (part 1) showing an example of application of the danger spot warning system 1 to a danger spot DS.

[0016] FIG. 2B is an external view (part 2) showing an example of application of the danger spot warning system 1 to a danger spot DS.

[0017] FIG. 2C is an external view (part 3) showing an example of application of the danger spot warning system 1 to a danger spot DS.

[0018] FIG. 2D is an external view (part 4) showing an example of using the danger spot warning system 1 in a danger spot DS.

[0019] The danger spot warning system 1 includes a helmet 10 with a warning device 20 attached thereto, and a danger spot registration device 30.

[0020] The warning device 20 is attached to the helmet 10 with the warning device in the direction in which the face of the worker H wearing the helmet 10 is positioned, that is, on the periphery of the front side of the helmet 10.

[0021] The warning device 20 has a housing curved in an arc along the lower edge of the periphery on the front side of the helmet 10, and is removably attached to the lower ends of both sides of the helmet 10, for example, by screw-type attachment parts 10a.

[0022] The warning device 20 may be provided with a face shield 10F along the bottom edge of its housing.

[0023] The warning device 20 includes an eye tracking unit 11, a short-range wireless communication unit 12, and a warning unit 13.

[0024] The eye tracking unit 11 includes a field of view image camera 11a that is installed facing outward in the center of the housing of the warning device 20 to acquire a field of view image, an eye camera 11b that is installed in a position corresponding to the eye E of the worker H to acquire a high-resolution image of the eye E, a near-infrared LED 11c for generating a light reflection pattern of the eye E, and an image processing unit not shown, and calculates the viewpoint ES of the worker H on the field of view image acquired by the field of view image camera 11a (see Figure 2C) (viewpoint acquisition unit).

[0025] The short-range wireless communication unit 12 is configured using Bluetooth (registered trademark), which has a communication range of about 10 m, and performs short-range wireless communication BT with the short-range wireless communication unit 32 of the danger spot registration device 30 attached to the danger spot DS, as shown in Figure 2A.

[0026] The warning unit 13 includes a sound / vibration unit 13a having a speaker (sound warning unit) and a vibrator (vibration unit) built into the housing of the warning device 20, and a warning LED 13b exposed to the outside of the housing, and is provided at a position corresponding to, for example, the temples of a human worker H who is sensitive to sound and vibration.

[0027] The dangerous spot registration device 30 is attached to each of the various dangerous spots DS present on-site.

[0028] The hazardous location registration device 30 includes a human presence sensor 31, a short-range wireless communication unit 32 similar to that described above, and a hazardous location indicator light 33.

[0029] The human presence sensor 31 detects the presence of humans using infrared rays, ultrasound, visible light, etc. For example, as shown in Figure 2A, the detection range Z is approximately 5 m in diameter from the human presence sensor 31, and it detects a worker H approaching a dangerous area DS.

[0030] The danger area indicator light 33 is constructed using, for example, a red LED, and when the human presence sensor 31 detects that a worker H is approaching the danger area DS, it flashes to make it easier for the worker H to notice the presence of the danger area DS.

[0031] The object to which the warning device 20 is attached is not limited to the helmet 10, but is preferably an object (head-mounted device) that must be attached to the head of the worker H at least when the worker H enters a site having a dangerous spot DS. Furthermore, the eye tracking unit 11 and the warning unit 13 included in the warning device 20 are not limited to being built into the warning device 20, but may be attached separately to the head-mounted device.

[0032] The dangerous spot warning system 1 of the embodiment has at least the following functions (1) to (6).

[0033] (1) As shown in FIG. 2A, when a worker H wearing a helmet 10 with a warning device approaches a dangerous spot DS to which a dangerous spot registration device 30 is attached, the warning device 20 transmits the worker ID, which is the identification information of the worker H, to the dangerous spot registration device 30 via short-range wireless communication BT.

[0034] (2) The hazardous location registration device 30 has a function of generating new entrant information indicating whether the worker H has a low level of experience with the hazardous location DS based on the worker ID.

[0035] (3) A function in which the danger spot registration device 30 transmits the generated new entrant information, danger spot information including danger spot image information which is a characteristic image of the danger spot registration device 30, and danger spot warning information which is a warning content according to the type of danger spot DS, to the warning device 20 via short-range wireless communication BT.

[0036] (4) A function in which the warning device 20 determines whether or not a warning is required for the worker H based on the new entrant information and the determination result of whether or not the worker H recognizes the dangerous spot DS, which is determined based on the worker H's viewpoint and dangerous spot image information acquired by the eye tracking unit 11.

[0037] (5) When the warning device 20 determines that a warning to the worker H is necessary, the warning unit 13 issues a warning about the dangerous area (outputs a warning sound WS, generates a warning vibration WV, and flashes a warning LED) based on the dangerous area warning information, as shown in Figure 2B.

[0038] (6) A function of stopping the warning of the dangerous area by the warning unit 13 as shown in Figure 2D when the warning device 20 determines that the worker H has recognized the dangerous area DS based on the worker H's viewpoint ES acquired by the eye tracking unit 11 as shown in Figure 2C.

[0039] <Configuration of warning device 20> FIG. 3 is a block diagram showing the configuration of the electronic circuit of the warning device 20. As shown in FIG.

[0040] The warning device 20 includes a control unit (CPU: Central Processing Unit) 21.

[0041] The control unit 21 is connected to the memory unit 22, the external input / output unit 23, the eye tracking unit 11, the short-range wireless communication unit 12, and the warning unit 13 via a system and data bus.

[0042] The control unit 21 controls the operation of each part of the circuit in accordance with a warning processing program 22a that is pre-stored in a memory unit 22 such as a flash memory, or a warning processing program 22a that is written and stored in the memory unit 22 from an information device such as a PC (Personal Computer) that is externally connected via the external input / output unit 23.

[0043] The warning processing program 22a of the embodiment includes a program that causes the control unit 21 to execute at least the above-described functions (1), (4), (5), and (6).

[0044] The electronic circuit of the warning device 20 is driven by a battery power supply BA that uses a dry battery or a rechargeable battery.

[0045] The memory unit 22 has a program memory area for storing a warning processing program 22a, as well as a worker ID memory area 22b, a new entrant information memory area 22c, a dangerous location information memory area 22d, a work data memory area 22e, and the like.

[0046] In the worker ID memory area 22b, worker ID data, which is the identification information of the worker H, is written and stored from an information device such as a PC externally connected via the external input / output unit 23, for example, when the worker H is loaned a helmet 10 with a warning device.

[0047] The new entrant information storage area 22c receives and stores new entrant information indicating whether or not the worker H has a low level of experience with the danger spot DS generated by the danger spot registration device 30 based on the worker ID.

[0048] The danger spot information storage area 22d stores danger spot image information 22d1 (characteristic image of the danger spot registration device 30 or danger spot DS) and danger spot warning information 22d2 (warning content according to the type of danger spot DS (for example, warning message "Watch out for openings!")) included in the danger spot information received from the danger spot registration device 30.

[0049] The working data storage area 22e temporarily stores, as needed, various data generated by the control unit 21 or input / output by the control unit 21 in accordance with the warning processing program 22a.

[0050] In the warning device 20 of the danger spot warning system 1 configured in this manner, the control unit 21 controls the operation of each unit in cooperation with the danger spot registration device 30 in accordance with the warning processing program 22a, and the hardware and software operate in cooperation to realize the warning function described in the operation explanation below.

[0051] <Configuration of the danger spot registration device 30> FIG. 4 is a block diagram showing the configuration of the electronic circuit of the dangerous spot registration device 30. As shown in FIG.

[0052] The dangerous spot registration device 30 includes a control unit (CPU) 34.

[0053] The control unit 34 is connected to a memory unit 35, an external input / output unit 36, a human sensor 31, a short-range wireless communication unit 32, and a hazardous area indicator light 33 via a system and a data bus.

[0054] The control unit 34 controls the operation of each part of the circuit in accordance with a dangerous spot notification processing program 35a that is stored in advance in a memory unit 35 such as a flash memory, and a dangerous spot notification processing program 35a that is written and stored in the memory unit 35 from an information device such as a PC that is externally connected via the external input / output unit 36 ​​(new entrant information generation unit).

[0055] The dangerous spot notification processing program 35a of the embodiment includes a program that causes the control unit 34 to execute at least the above-mentioned functions (2) and (3).

[0056] The electronic circuit of the hazardous location registration device 30 is driven by a battery power supply BA that uses a dry battery or a rechargeable battery.

[0057] The storage unit 35 has a program storage area for storing a dangerous spot notification processing program 35a, as well as a worker ID registration area 35b, a dangerous spot information registration area 35c, a work data storage area 35d, and the like.

[0058] In the worker ID registration area 35b, when the human presence sensor 31 detects that a worker H has approached a hazardous location DS, the worker ID data corresponding to the worker H received from the warning device 20 is stored and registered. The worker ID data registered in the worker ID registration area 35b may be stored in association with either or both of the date when the worker ID was first received by the hazardous location registration device 30 (corresponding to the date when the worker H first approached the hazardous location DS) and the number of times the worker ID was received by the hazardous location registration device 30 (corresponding to the number of times the worker H approached the hazardous location DS).

[0059] Hazardous spot information registration area 35c stores and registers dangerous spot image information 35c1 (characteristic image of the dangerous spot registration device 30 or dangerous spot DS) and dangerous spot warning information 35c2 (warning content according to the type of dangerous spot DS (for example, warning message "Watch out for openings!")). The warning message of dangerous spot warning information 35c2 is, for example, "Watch out for protrusions at your feet!" if the type of dangerous spot DS to which the dangerous spot registration device 30 is attached is a protrusion at your feet at the site, "Watch out for protrusions above your head!" if it is a protrusion above your head at the site, or "Watch out for live parts!" if it is a live part at the site.

[0060] The working data storage area 35d temporarily stores, as needed, various data generated by the control unit 34 or input / output by the control unit 34 in accordance with the dangerous spot notification processing program 35a.

[0061] In the danger spot registration device 30 of the danger spot warning system 1 configured in this manner, the control unit 34 controls the operation of each unit in cooperation with the warning device 20 in accordance with the danger spot notification processing program 35a, and the hardware and software operate in cooperation to realize the danger spot notification function described in the operation explanation below.

[0062] Next, the operation of the dangerous spot warning system 1 according to the embodiment will be described.

[0063] <Operation of Hazardous Area Warning System 1> FIG. 5 is a flowchart showing the warning process executed by the warning device 20 of the dangerous spot warning system 1 and the dangerous spot notification process executed by the dangerous spot registration device 30.

[0064] Here, as shown in Figs. 2A to 2D, an embodiment will be described in which the type of dangerous spot DS to which the dangerous spot registration device 30 is attached is an opening.

[0065] As shown in FIG. 2A, when a worker H wearing a helmet 10 with a warning device enters a work site and approaches a danger spot DS (opening) to which a danger spot registration device 30 is attached, the human presence sensor 31 of the danger spot registration device 30 detects the worker H as a person approaching the danger spot DS (step R1 (Yes)) (approaching person detection unit), and the control unit 34 of the danger spot registration device 30 flashes the danger spot indicator light 33 to notify the worker H of the danger spot DS so that it stands out (step R2).

[0066] Then, the control unit 34 communicates with the warning device 20 of the worker H's helmet 10 equipped with a warning device via short-range wireless communication unit 32 via short-range wireless communication BT, and transmits a signal requesting the worker ID to the warning device 20 (step R3) (request transmission unit).

[0067] When the warning device 20 of worker H receives a signal requesting the worker ID transmitted from the hazardous area registration device 30 (step W1 (Yes)), the control unit 21 reads out the worker ID of the worker H stored in the worker ID memory area 22b and transmits it to the hazardous area registration device 30 that requested the worker ID (step W2) (worker identification information transmission unit).

[0068] When the danger area registration device 30 receives the worker ID transmitted from the warning device 20 (step R4 (Yes)), the control unit 34 determines whether the received worker ID has already been registered in the worker ID registration area 35b (step R5).

[0069] If it is determined here that the received worker ID has not already been registered in the worker ID registration area 35b (step R5 (No)), the control unit 34 associates the received worker ID with the current date (corresponding to the date of first approach) and the number of times it has been received, “1” (corresponding to the number of approaches), and stores and registers it in the worker ID registration area 35b (step R6) (worker identification information registration unit).

[0070] On the other hand, if it is determined that the received worker ID has already been registered in the worker ID registration area 35b (step R5 (Yes)), the control unit 34 updates the number of receptions (number of approaches to the dangerous location DS) stored in association with the registered worker ID by adding "+1" (step R5a).

[0071] The control unit 34 generates new entrant information indicating whether the worker H has a low or high level of experience with the dangerous location DS, depending on whether a predetermined period (e.g., two weeks) has passed since the date (date of first approach) associated with the received worker ID and stored in the worker ID registration area 35b, or whether the number of receptions (number of approaches) associated with the received worker ID and stored in the worker ID registration area 35b has reached a predetermined number (e.g., three times) (step R7) (new entrant information generation unit).

[0072] Furthermore, survey statistics on the safety management of worker H at a site have reported that there are a relatively large number of accidents related to dangerous points DS at the site in the two weeks or so after worker H starts working at a new site, and it is assumed that this is a period in which worker H has little experience with dangerous points DS at the site.

[0073] The control unit 34 transmits the new entrant information generated in step R7 and danger area information including danger area image information 35c1 (characteristic image of the danger area registration device 30 or danger area DS) and danger area warning information 35c2 (here, the warning message corresponding to the opening, "Caution at the opening!") registered in the danger area information registration area 35c to the warning device 20 (step R8) (information transmitting unit) (image information transmitting unit).

[0074] When the warning device 20 receives the new entrant information corresponding to worker H and the danger location information corresponding to danger location DS sent from the danger location registration device 30 (step W3 (Yes)), the control unit 21 stores the received new entrant information in the new entrant information storage area 22c, and also stores the received danger location information in the danger location information storage area 22d.

[0075] Then, if the stored new entrant information indicates that the worker H has little experience with the dangerous spot DS (opening), the worker H is judged to be a "new entrant" (step W4 (Yes)) (new entrant judgment unit), and a dangerous spot warning process is executed (step W6) (warning unit).

[0076] That is, based on the danger spot warning information 22d2 stored in the danger spot information storage area 22d, the control unit 21 causes the sound / vibration unit 13a of the warning unit 13 to output a warning voice "Caution: Opening!" WS and generate a warning vibration WV, and also causes the warning LED 13b to flash, as shown in FIG. 2B.

[0077] As a result, if a worker H approaching a dangerous spot DS corresponds to a "new entrant" who has little experience in dangerous spots DS, the "new entrant" worker H can be immediately warned with a warning voice "Caution at openings!" WS and warning vibration WV according to the type of dangerous spot DS. Furthermore, by flashing the warning LED 13b, other workers H in the vicinity of the site can also be notified and warned of the presence of the "new entrant" worker H approaching the dangerous spot DS.

[0078] On the other hand, if the stored new entrant information indicates that worker H has a high degree of experience in dangerous areas DS (openings), the control unit 21 determines that worker H is not a “new entrant” (step W4 (No)).

[0079] Then, the control unit 21 determines whether or not the dangerous area DS has been visually observed by the worker H within a certain period of time after the warning process has started, i.e., within a certain period of time (for example, within 3 seconds) after the worker H approaches the dangerous area DS and a signal requesting the worker ID is received (step W5) (danger area visual observation determination unit).

[0080] Specifically, whether or not the dangerous spot DS has been visually observed by the worker H is determined based on whether or not the viewpoint ES of the worker H acquired by the eye tracking unit 11 is in an image area on the visual field image acquired by the visual field image camera 11a where the similarity to the dangerous spot image information 22d1 (characteristic image of the dangerous spot registration device 30 or the dangerous spot DS) stored in the dangerous spot information storage area 22d is higher than a set threshold (step W5).

[0081] Here, if it is determined that the dangerous spot DS is not visually observed by the worker H within a certain period of time after the worker H approaches the dangerous spot DS (step W5 (No)), the control unit 21 executes the dangerous spot warning process as described above, and causes the sound / vibration unit 13a of the warning unit 13 to output a warning voice "Caution: Opening!" WS and generate a warning vibration WV, as shown in FIG. 2B, and also causes the warning LED 13b to flash (step W6) (warning unit).

[0082] As a result, even if a worker H approaching a dangerous spot DS has a high degree of experience with dangerous spots DS and does not qualify as a "new entrant," if the worker H is an "careless person" who has not visually checked the dangerous spot DS, the "careless person" can be quickly warned with a warning voice "Watch out for openings!" WS and warning vibration WV according to the type of dangerous spot DS. Furthermore, by flashing the warning LED 13b, other workers H in the vicinity of the site can also be notified and warned of the presence of the "careless person" worker H approaching the dangerous spot DS.

[0083] In this manner, when the dangerous spot warning process is being executed for worker H who is a "new entrant" or for worker H who is not a "new entrant" but is "inattentive" (step W6), as shown in FIG. 2C, when it is determined that worker H has visually observed the dangerous spot DS because the viewpoint ES of worker H acquired by the eye tracking unit 11 moves to the image area corresponding to the dangerous spot DS in the field of view image of worker H acquired by the field of view image camera 11a (step W7 (Yes)), the control unit 21 stops the dangerous spot warning process being executed (step W8) (warning stop unit), as shown in FIG. 2D.

[0084] That is, the sound / vibration unit 13a of the warning unit 13 stops outputting the warning voice WS and generating the warning vibration WV, and also stops blinking the warning LED 13b.

[0085] As a result, regardless of whether the worker H is a "newcomer" with little experience with the dangerous spot DS (here, an opening) that he has approached, or an "inattentive person" who has not visually seen the dangerous spot DS, if the worker H visually sees and recognizes the dangerous spot DS, the warning will be stopped immediately, thereby preventing inconveniences such as the worker H becoming accustomed to persistent warnings or the disruption of work for other workers H in the vicinity.

[0086] In the danger spot registration device 30, when the human presence sensor 31 no longer detects a person approaching the danger spot DS, the control unit 34 turns off the danger spot indicator light 33 (step R9).

[0087] In the danger spot notification process (FIG. 5) of the danger spot registration device 30 described above, if the worker ID is not received from the warning device 20 (step R4 (No)), the subsequent process is not performed. However, the present invention is not limited to this, and the configuration may be such that only danger spot information corresponding to the danger spot DS is sent to the warning device 20, and the warning device 20 performs the danger spot warning process (steps W6 to W8) regardless of whether the person is a "new entrant" or not.

[0088] <Summary of the embodiment> As described above, according to the hazardous spot warning system 1 of the embodiment, if the worker H approaching the hazardous spot DS is a "new entrant" who has little experience of hazardous spots DS, the "new entrant" worker H can be immediately warned with a warning voice WS and a warning vibration WV according to the type of hazardous spot DS. Furthermore, by flashing the warning LED 13b, other workers H in the vicinity of the work site can also be notified and warned of the presence of the "new entrant" worker H approaching the hazardous spot DS.

[0089] Furthermore, according to the hazardous spot warning system 1 of the embodiment, even if a worker H approaching a hazardous spot DS has a high degree of experience with hazardous spots DS and does not qualify as a "newcomer," if the worker H is a "careless person" who has not visually observed the hazardous spot DS, the "careless person" worker H can be quickly warned with a warning voice WS and warning vibration WV according to the type of hazardous spot DS. Furthermore, by flashing the warning LED 13b, other workers H in the vicinity of the work site can also be notified and warned of the presence of the "careless person" worker H approaching the hazardous spot DS.

[0090] Furthermore, according to the hazardous spot warning system 1 of the embodiment, regardless of whether the worker H is a "newcomer" with little experience in the approaching hazardous spot DS or an "inattention-seeking person" who has not visually seen the hazardous spot DS, if the worker H visually sees and recognizes the hazardous spot DS, the warning is immediately stopped, thereby preventing inconveniences such as the worker H becoming accustomed to persistent warnings or the disruption of work for other workers H in the vicinity.

[0091] Therefore, according to the dangerous spot warning system 1 of the embodiment, it is possible to effectively issue appropriate warnings according to a wide variety of dangerous spots in accordance with the worker's awareness of the dangerous spots.

[0092] Although several embodiments of the present invention 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. [Explanation of symbols]

[0093] 1...hazardous area warning system, 10...helmet with warning device, 11...eye tracking unit, 11a...field of view video camera, 11b...eye camera, 11c...near-infrared LED, 12...short-range wireless communication unit, 13...warning unit, 13a...alarm sound / vibration unit, 13b...warning LED, 20...warning device, 30...hazardous area registration device, 31...human presence sensor, 32...short-range wireless communication unit, 33...hazardous area indicator light, H...worker, E...eye, BT...short-range wireless communication, DS...hazardous area, Z...detection range, WS...alarm sound, WV...alarm vibration, ES...viewpoint.

Claims

1. A dangerous spot warning system including a dangerous spot registration device and a warning device that has a wireless communication function with the dangerous spot registration device and is worn on the head of a worker, The dangerous spot registration device a new entrant information generating unit that generates new entrant information according to the worker's level of experience with dangerous places, based on the worker's identification information received from the warning device; an information transmitting unit that transmits the new entrant information and dangerous spot warning information including warning content corresponding to the dangerous spot to the warning device, The warning device a worker identification information transmitting unit that transmits the worker identification information to the danger spot registration device; a viewpoint acquisition unit that acquires the viewpoint of the worker; a new entrant determination unit that determines whether the worker is a new entrant whose experience level with respect to the hazardous location is lower than a preset experience level, based on the new entrant information of the worker received from the hazardous location registration device; a danger spot visual determination unit that determines whether the worker has visually observed the danger spot based on the worker's viewpoint; a warning unit that issues a warning with warning content according to the type of the dangerous spot based on the dangerous spot warning information received from the dangerous spot registration device when the worker is determined to be a new entrant and when the worker is determined not to be a new entrant but has not visually observed the dangerous spot, Hazardous area warning system.

2. In the dangerous spot registration device, The new visitor information generation unit a worker identification information registration unit that registers the worker identification information received from the warning device in association with the date on which the identification information was first received or the number of times the identification information was received, generating new entrant information indicating whether the worker has a low or high level of experience depending on whether a predetermined period has elapsed since the date of registration or whether the number of times the worker has been registered has not reached a predetermined number; The dangerous spot warning system according to claim 1 .

3. The dangerous spot registration device an image information transmitting unit that transmits image information corresponding to the dangerous location to the warning device; In the warning device, the viewpoint acquisition unit acquires a viewpoint of the worker on a visual field image, the danger spot visual determination unit determines that the worker is not visually observing the danger spot when the viewpoint of the worker on the visual field video is not in an image area where a similarity to the image corresponding to the danger spot received from the danger spot registration device is higher than or equal to a preset threshold. The dangerous spot warning system according to claim 1 or 2.

4. The information on the image corresponding to the danger spot is information on a characteristic image of the danger spot registration device attached to the danger spot or information on a characteristic image of the danger spot. The dangerous spot warning system according to claim 3 .

5. The dangerous spot registration device an approaching individual detection unit that detects an approaching individual; a request sending unit that sends a signal requesting identification information of the worker to the warning device when the approaching person is detected, In the warning device, the worker identification information transmitting unit transmits the worker identification information to the hazardous area registration device when a signal requesting the worker identification information is received from the hazardous area registration device; The dangerous spot warning system according to any one of claims 1 to 4.

6. The warning device and a warning stop unit that stops the warning when it is determined that the worker has visually observed the dangerous location while the warning unit is issuing a warning. The dangerous spot warning system according to any one of claims 1 to 5.

7. The warning device includes an alarm sound and vibration unit, The warning unit causes the sound and vibration unit to output a sound indicating a warning content according to the type of the dangerous location and to generate a vibration to warn the user. The dangerous spot warning system according to any one of claims 1 to 6.

8. the warning device comprises a warning LED; The warning unit issues a warning by flashing the warning LED. The dangerous spot warning system according to claim 7.

9. The warning device is attached to a helmet mounted on the worker's head. The dangerous spot warning system according to any one of claims 1 to 8.

10. The warning device of the dangerous spot warning system according to claim 1.

11. A hot spot registration device for the hot spot warning system according to claim 1.

12. A method for warning a dangerous spot by using a dangerous spot registration device and a warning device that has a wireless communication function with the dangerous spot registration device and is worn on the head of a worker, The dangerous spot registration device generating new entrant information according to the worker's level of experience with dangerous places based on the worker's identification information received from the warning device; transmitting the new entrant information and dangerous location warning information including warning content corresponding to the dangerous location to the warning device; The warning device transmitting identification information of the worker to the hazardous location registration device; acquiring a viewpoint of the worker; determining whether the worker is a new entrant whose experience level with respect to the hazardous location is lower than a preset experience level based on the new entrant information of the worker received from the hazardous location registration device; determining whether the worker has visually observed the dangerous spot based on the worker's viewpoint; When the worker is determined to be a new entrant, and when the worker is determined not to be a new entrant but has not visually observed the dangerous spot, a warning is issued with warning content according to the type of the dangerous spot based on the dangerous spot warning information received from the dangerous spot registration device. This is a method of warning people about danger.

13. A program to be executed by a control unit of a hazardous location registration device and a control unit of a warning device which has a wireless communication function with the hazardous location registration device and is worn on the head of a worker, A control unit of the danger spot registration device, a new entrant information generating unit that generates new entrant information according to the worker's level of experience with dangerous places, based on the worker's identification information received from the warning device; an information transmitting unit that transmits the new entrant information and dangerous location warning information including warning content corresponding to the dangerous location to the warning device; A control unit of the warning device a worker identification information transmitting unit that transmits the worker identification information to the danger spot registration device; a viewpoint acquisition unit for acquiring the viewpoint of the worker; a new entrant determination unit that determines whether the worker is a new entrant whose experience level with respect to the hazardous location is lower than a preset experience level, based on the new entrant information of the worker received from the hazardous location registration device; a danger spot visual determination unit that determines whether the worker has visually observed the danger spot based on the worker's viewpoint; When the worker is determined to be a new entrant, and when the worker is determined not to be a new entrant but has not visually observed the dangerous spot, the warning unit functions as a warning unit that issues a warning with warning content according to the type of the dangerous spot based on the dangerous spot warning information received from the dangerous spot registration device. Program for.

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