JP2014203342A - Method for collecting information on dangerous spot existing in work area, and dangerous spot information collecting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply collect information required for preventing a worker from having an accident in a work site in real time so as to secure the safety of work on site.SOLUTION: A worker 5 in a work area 3 is allowed to carry a vibration sensor 114 and a first communication device 113 which transmits a radio signal including an output waveform thereof. A plurality of base stations 30 are arranged along a flow line of the worker 5. When receiving a radio signal from the first communication device 113, the base station 30 transmits the output waveform to which position specification information is attached, to an information processing device 40. The information processing device 40 stores an output waveform when the worker 5 is normally working in association with position specification information thereof as a reference waveform. The information processing device 40 then compares the output waveform received by the base station 30 during the work by the worker 5 to the reference waveform corresponding to the position specification information and determines whether the worker 5 encounters a danger. When the worker 5 encounters a danger, the fact is stored in association with the position specification information.

Description

  TECHNICAL FIELD The present invention relates to a method for collecting information on a dangerous point existing in a work area and a dangerous point information collecting system, and particularly, information necessary for preventing an operator's accident at a work site is collected easily and in real time. The present invention relates to a technique for ensuring work safety.

  In Patent Document 1, a plurality of IC tags each storing a unique tag ID are arranged at a fixed position on a construction site, and the IC tag is attached to a moving body. The tag ID is read from the fixed tag, the read tag ID is transmitted to the management device, the management device receives the tag ID from the reader device, and the tag ID that is a fixed tag among the received tag IDs. It is described that corresponding position information is read from a fixed tag information database, and based on the read position information, a region where a moving tag can be located at a construction site is specified.

JP 2007-271347 A

  In construction sites and the like, there are actual situations in which the detection of dangerous spots and accident prevention that exist on the site are not necessarily performed reliably. For example, in a new construction plant, because the floor color is uniform, there are cases where the operator cannot perceive subtle inclinations or steps, and creeps or falls. There are also cases of falling down on the stairs without noticing the difference in level or striking the head at an intricate place on the site.

  For such dangerous places, measures such as attaching warning displays based on actual on-site experiences such as near-miss cases and improving facilities are taken. However, it is not always possible to discover or detect all dangers based only on information based on the actual experience of the worker, and it is not always possible to find potential dangers that the worker does not feel dangerous. In addition, when the situation of the site changes temporally and fluidly, such as at a construction site, measures based on information based on the actual experience of the worker are not sufficient to ensure real-time performance and ensure the worker's safety sufficiently. I can't.

  The present invention has been made in view of such a background, it is possible to easily and in real time collect information necessary to prevent an operator's accident at the work site, it is possible to ensure the safety of work at the site, It is an object of the present invention to provide a method for collecting information on a dangerous point existing in a work area and a dangerous point information collecting system.

  One aspect of the present invention for achieving the above object is a method for collecting information on a dangerous point existing in a work area, and provides a vibration sensor and an output of the vibration sensor to a worker who performs work in the work area. A first communication device that transmits a radio signal including a waveform, and a plurality of base stations provided with a second communication device along a flow line of the worker in the work area, and each of the base stations An information processing apparatus for communication is provided, and when the first communication apparatus transmits the radio signal and the base station receives the radio signal, the output waveform is acquired in the output waveform included therein. The output waveform acquired when the information processing apparatus is working normally, and the information processing apparatus transmits the position specifying information, which is information for specifying the determined position, to the information processing apparatus. The output waveform The reference waveform corresponding to the position specifying information of the output waveform is stored as a reference waveform in association with the position specifying information, and the output waveform received by the base station when the worker is working. It is determined whether or not the worker has encountered a danger by comparing with the above, and if it is determined that a danger has been encountered, that fact is stored in association with the position specifying information.

  As described above, in the present invention, the information processing apparatus is configured so that the operator normally uses the output waveform received by the base station when the worker is performing work (including normal walking (including patrol inspection and movement)). Compared to the reference waveform acquired when working on the machine, it is automatically determined whether the worker has encountered a danger at that position. Since the fact that a danger has been encountered at the acquisition position is stored, information necessary for preventing an operator's accident can be collected easily and in real time.

  One aspect of the present invention is the above-described method, wherein the information processing apparatus uses the output waveform received by the base station when the worker is working and the position specifying information of the output signal. When the similarity with the corresponding reference waveform exceeds a predetermined threshold, it is determined that the worker has encountered a danger.

  According to the present invention, the information processing apparatus accurately determines whether or not the worker has encountered danger based on the similarity between the output waveform received by the base station and the reference waveform when the worker is working. Can be determined. For this reason, it is possible to reliably collect only information necessary for preventing an operator's accident at the work site.

  Another aspect of the present invention is the method described above, wherein the information processing device includes the reference waveform in the vicinity of a maximum point of a periodic waveform acquired by the worker walking. When a spike-like waveform having an amplitude exceeding a predetermined threshold that cannot be seen is included, the fact that the worker has encountered a danger of hitting while walking is stored in association with the position specifying information.

  If a spike-like waveform with an amplitude exceeding a predetermined threshold that is not found in the reference waveform is included in the vicinity of the maximum point of the periodic waveform acquired when the worker walks, that waveform is acquired. There is a high possibility that the worker has encountered a danger of craving at the location. That is, according to the present invention, it is possible to accurately determine whether or not the worker has encountered a danger of craving at the position where the waveform is acquired. For this reason, it is possible to reliably collect only information necessary for preventing an operator's accident at the work site.

  Another aspect of the present invention is the method described above, wherein the information processing apparatus is a predetermined waveform that is not found in the reference waveform in a periodic waveform acquired by the worker walking. When the disturbance of the period of the time width exceeding the threshold is included, the fact that the worker has encountered the danger of stepping off while walking is stored in association with the position specifying information.

  If the periodic waveform acquired when the worker walks includes a disturbance in the period with a time width that exceeds a predetermined threshold that is not found in the reference waveform, the worker may encounter a risk of stepping off. It is highly possible. That is, according to the present invention, it is possible to accurately determine whether or not the worker has encountered the danger of stepping off at the position where the waveform is acquired. For this reason, it is possible to reliably collect only information necessary for preventing an operator's accident at the work site.

  According to another aspect of the present invention, the vibration sensor is provided in the vicinity of the operator's head, and the information processing apparatus includes an output waveform of the vibration sensor in the reference waveform. When a spike-like waveform with an amplitude exceeding a predetermined threshold that cannot be seen is included, the fact that the worker has encountered a danger of colliding the head during walking is stored in association with the position specifying information. And

  According to the present invention, when the output waveform of the vibration sensor includes a spike-like waveform with an amplitude exceeding a predetermined threshold that is not found in the reference waveform, there is a risk that an operator may collide the head during walking. It is likely that you have encountered it. That is, according to the present invention, it is possible to accurately determine whether or not the worker has encountered the danger of colliding the head during walking at the position where the waveform is acquired. For this reason, it is possible to reliably collect only information necessary for preventing an operator's accident at the work site.

  According to another aspect of the present invention, there is provided the above method, wherein the information is provided with a position acquisition device for acquiring the current position of the worker, and a notification device for notifying the worker of the danger. When a position where the worker encounters danger exists in the vicinity of the current position of the worker, the processing device notifies the danger that the worker may encounter danger.

  According to the present invention, it is possible to reliably notify an operator that there is a high possibility of encountering a danger around the current position, and it is possible to ensure the safety of work on site.

  In addition, the subject which this application discloses, and its solution method are clarified by the column of the form for inventing, and drawing.

  ADVANTAGE OF THE INVENTION According to this invention, the information required in order to prevent the operator's accident in a work site can be collected simply and in real time, and the safety | security of the work in a site can be ensured.

1 is a diagram illustrating a schematic configuration of a dangerous part information collection system 1. FIG. 2 is a diagram illustrating hardware of an RF tag 10. FIG. It is a figure explaining the function with which RF tag 10 is provided. 2 is a diagram illustrating hardware of a base station 30. FIG. It is a figure explaining the function with which the base station 30 is provided. It is a figure explaining the hardware of the information processing apparatus. It is a figure explaining the function with which the information processing apparatus 40 is provided. 4 is an example of a reference waveform table 450; 4 is an example of a working waveform table 460. It is an example of danger encounter information 470. This is a management screen 4170. It is a flowchart explaining standard waveform acquisition processing S10. It is a flowchart explaining in-work waveform acquisition process S20. It is a flowchart explaining dangerous spot collection processing S30. It is an example of the reference waveform 1500. It is an example of a waveform 1600 during work. It is an example of a waveform 1600 during work. It is a flowchart explaining dangerous spot alerting | reporting process S40.

  FIG. 1 shows a schematic configuration of a dangerous point information collection system 1 described as the present embodiment. As shown in the figure, the hazardous location information collection system 1 is, for example, a construction site such as a plant, a tunnel or building under construction, a site such as a condominium or house under construction (hereinafter also referred to as a work area 3). The RF tag 10 attached to the worker 5 who performs the work, the plurality of base stations 30 provided along the flow line of the worker 5, the information processing device 40, and the information processing device 40 are communicably connected. And a notification device 50 (for example, a speaker, an electric bulletin board, etc.) for performing notification to the worker 5.

  The RF tag 10 (RFID tag, wireless IC tag, etc.) is attached to, for example, the foot portion or head of the worker 5.

  The base station 30 is provided along the flow line of the worker 5 such as an entrance / exit of the work area 3, a passage, a staircase, and a room. The base station 30 receives a radio signal transmitted from the RF tag 10 of the worker 5 existing in its own communication area 7.

  The information processing apparatus 40 is communicably connected to each of the base stations 30 via a communication network 9 such as a LAN, a wireless LAN, the Internet, a dedicated line, and power line communication (PLC (Power Line Communication)). Based on the information transmitted from the base station 30, the dangerous part is collected.

  FIG. 2 shows the hardware of the RF tag 10. As shown in the figure, the RF tag 10 includes a central processing unit 111 (CPU, MPU, etc.), a main storage device 112 (RAM, ROM, NVRAM, etc.), a first communication device 113, a vibration sensor 114, and a timing circuit 115. (RTC (Real Time Clock) etc.).

  Among these, the first communication device 113 is bidirectional with the base station 30 by a wireless communication method (for example, wireless LAN, Internet, communication method according to the standard IEEE 802.15.1, communication method according to the standard IEEE 802.15.4). Alternatively, one-way communication is performed. The vibration sensor 114 is, for example, an acceleration sensor, a speed sensor, a displacement sensor, or the like.

  FIG. 3 shows main functions of the RF tag 10. As shown in the figure, the RF tag 10 includes a wireless signal transmission unit 131. The wireless signal transmission unit 131 is realized by the hardware of the RF tag 10 or by the central processing unit 111 of the RF tag 10 reading and executing a program stored in the main storage device 112. The wireless signal transmission unit 131 transmits a wireless signal including the output waveform of the vibration sensor 114 to the base station 30.

  FIG. 4 shows the hardware configuration of the base station 30. As shown in the figure, the base station 30 includes a central processing unit 311 (CPU, MPU, etc.), a main storage device 312 (RAM, ROM, NVRAM, etc.), and a second communication device 313.

  The second communication device 313 communicates with the RF tag 10 by a wireless communication method (for example, a wireless LAN, the Internet, a communication method based on the standard IEEE 802.15.1, a communication method based on the standard IEEE 802.15.4). The second communication device 313 is bidirectional with the information processing device 40 by a wired or wireless communication method (for example, LAN, wireless LAN, Internet, dedicated line, power line communication (PLC (Power Line Communication), etc.). Alternatively, one-way communication is performed.

  FIG. 5 shows main functions provided in the base station 30. As shown in the figure, the base station 30 includes a radio signal reception unit 331, an identifier storage unit 332, and a radio signal transmission unit 333. These functions are realized by the hardware of the base station 30 or by the central processing unit 311 of the base station 30 reading and executing a program stored in the main storage device 312.

  The wireless signal receiving unit 331 receives a wireless signal (a wireless signal including an output waveform of the vibration sensor 114) transmitted from the RF tag 10.

  The identifier storage unit 332 stores the identifier of itself (base station 30). This identifier is used as information indicating the position where the output waveform received by the wireless signal receiving unit 331 is acquired. Note that the RF tag 10 may be provided with a GPS function to acquire the position of the RF tag 10 and use the position information as an alternative to the identifier. In addition, a device for acquiring the position of the RF tag 10 based on the phase difference between a plurality of radio signals transmitted from the RF tag 10 (hereinafter, referred to as a position locating device) may be provided (details of the position locating device are disclosed in Japanese Patent Application Laid-Open No. 2003-26883). 2004-184078, JP-A-2005-351877, JP-A-2005-351878, JP-A-2006-23261, etc.). Hereinafter, the base station 30 is also referred to as a position acquisition device.

  The wireless signal transmission unit 333 attaches information indicating the position where the output waveform is acquired (hereinafter referred to as position specifying information) to the output waveform included in the wireless signal received by the wireless signal reception unit 331. To the information processing device 40.

  FIG. 6 shows a hardware configuration of the information processing apparatus 40. As shown in the figure, the information processing device 40 includes a central processing unit 411 (CPU, MPU, etc.), a main storage device 412 (RAM, ROM, NVRAM, etc.), an external storage device 413 (hard disk, SSD, etc.), a communication device. 414, an input device 416 such as a touch panel and operation buttons, and a display device 417 such as a liquid crystal display.

  Among these, the communication device 414 is bidirectional or one-way between the base station 30 by a wired or wireless communication method (for example, LAN, wireless LAN, Internet, dedicated line, power line communication (PLC (Power Line Communication) etc.)). Directional communication.

  FIG. 7 shows main functions of the information processing apparatus 40. As shown in the figure, the information processing apparatus 40 includes a wireless signal receiving unit 431, a reference waveform storage unit 432, a working waveform storage unit 433, a dangerous part accumulation unit 434, and a dangerous part notification unit 435.

  Among these, the radio signal receiving unit 431 receives a radio signal transmitted from the base station 30.

  The reference waveform storage unit 432 is an output waveform (hereinafter referred to as a reference waveform) acquired when the operator 5 is working normally among the output waveforms included in the wireless signal received by the wireless signal receiving unit 431. Are stored in the reference waveform table 450 in association with the position specifying information of the output waveform.

  FIG. 8 shows an example of the reference waveform table 450. As shown in the figure, the reference waveform table 450 includes at least one record including items of a waveform 451 and a position 452. Of these, the waveform 451 is set with the name of the data storing the reference waveform data. The position 452 stores position specifying information.

  Returning to FIG. 7, the in-work waveform storage unit 433 is an output waveform (hereinafter, referred to as “output waveform”) acquired when the worker 5 is working among the output waveforms included in the wireless signal received by the wireless signal receiving unit 432. Is referred to as a working waveform) and stored in the working waveform table 460 in association with the position specifying information.

  FIG. 9 shows an example of the working waveform table 460. As shown in the figure, the working waveform table 460 includes at least one record including items of a waveform 461 and a position 462. Of these, the waveform 461 is set with the data name of the data storing the working waveform. In the position 462, position specifying information is stored. The position specifying information is represented by, for example, an identifier assigned to each position or area of the work area 3 and coordinates in a two-dimensional or three-dimensional coordinate system.

  Returning to FIG. 7, the dangerous part accumulating unit 434 compares the in-work waveform stored in the in-work waveform storage unit 433 with a reference waveform corresponding to the position indicated by the position specifying information of the in-work waveform. 5 determines whether or not a danger has been encountered, and if it is determined that a danger has been encountered, the fact is stored in the dangerous part table 470 in association with the position specifying information. The reference waveform and the working waveform are compared based on, for example, Fourier transform, wavelet transform, or the like.

  FIG. 10 shows an example of the dangerous place table 470. As shown in the figure, the dangerous spot table 470 is composed of at least one record including items of a position 471, contents 472, and the number of times 473. Among these, the position specifying information is stored in the position 471. The content 472 stores information indicating the content of danger that the operator 5 has encountered at the position 471 (eg, hitting a foot, stepping off a foot, etc.). The number of times 473 stores the number of times the worker 5 has encountered the danger of the contents 472.

  Returning to FIG. 7, the danger location notification unit 435 notifies the notification device 50 that there is a possibility of encountering a danger when the worker 5 encounters a danger in the vicinity of the current position of the worker 5. To do.

  FIG. 11 shows a screen (hereinafter referred to as a management screen 4170) displayed on the display device 417 of the information processing apparatus 40. The manager or the like of the work area 3 uses this screen to collect information on the dangerous part, notify the dangerous part, and the like.

  As shown in the figure, the management screen 4170 is provided with selection fields such as a reference waveform acquisition 4171, a working waveform acquisition 4172, a dangerous spot collection 4173, and a notification start 4174. When an administrator or the like operates the input device 416 to select any selection column, a function corresponding to the selection column is activated.

  Hereinafter, a process performed by the dangerous point information collection system 1 when each selection field is selected will be described.

  FIG. 12 is a flowchart for explaining a process of acquiring a reference waveform (hereinafter referred to as a reference waveform acquisition process S10) performed by the dangerous spot information collection system 1 when the reference waveform acquisition 4171 is selected. The reference waveform acquisition process S10 is executed, for example, in a situation where it is guaranteed that the worker 5 does not encounter danger during the work.

  As shown in the figure, the RF tag 10 transmits a radio signal including the output waveform of the vibration sensor 114 at any time (for example, at a preset timing) (S111).

  The base station 30 monitors the reception of the radio signal in real time (S112: NO). When the base station 30 receives the radio signal (S112: YES), the base station 30 assigns its own identifier to the output waveform included in the received radio signal. The attached information (hereinafter referred to as worker information) is transmitted to the information processing apparatus 40 (S113).

  When the information processing apparatus 40 receives the worker information transmitted from the base station 30 (S114: YES), the output waveform included in the worker information is associated with the identifier and stored in the reference waveform table 450. (S115). Thereafter, the process returns to S114.

  FIG. 13 is a flowchart for explaining a process of acquiring a work-in-progress waveform (hereinafter referred to as work-in-progress waveform acquisition process S20), which is performed by the dangerous spot information collection system 1 when the work-in-progress waveform acquisition 4172 is selected. is there.

  As shown in the figure, the RF tag 10 transmits a radio signal including the output waveform of the vibration sensor 114 at any time (for example, at a preset timing) (S211).

  The base station 30 monitors the reception of the radio signal in real time (S212: NO). When the base station 30 receives the radio signal (S212: YES), the base station 30 adds position acquisition information to the output waveform included in the received radio signal. The attached information (worker information) is transmitted to the information processing apparatus 40 (S213).

  Next, when the information processing apparatus 40 receives the worker information transmitted from the base station 30 (S214: YES), the information processing apparatus 40 associates the output waveform and the identifier included in the worker information with each other and displays the working waveform table. It is stored in 460 (S215). Thereafter, the process returns to S214.

  FIG. 14 is a flowchart illustrating a process of collecting a dangerous place (hereinafter referred to as a dangerous place collection process S30) performed by the dangerous place information collection system 1 when the dangerous place collection 4173 is selected.

  As shown in the figure, the information processing apparatus 40 selects one of the positions registered in both the reference waveform table 450 and the working waveform table 460 (S311).

  The information processing apparatus 40 refers to the reference waveform table 450 and obtains a reference waveform at the position selected in S311 (hereinafter referred to as a selected position). The information processing apparatus 40 refers to the working waveform table 460 and acquires the working waveform at the selected position (S312).

  The information processing apparatus 40 removes noise of the reference waveform at the selected position and the waveform in operation at the selected position acquired in S312 (for example, removal of a waveform below a predetermined frequency by a low-pass filter or weighted average processing) (S313).

  The information processing apparatus 40 compares the reference waveform and the working waveform from which noise has been removed in S313 (S314). Specifically, the information processing apparatus 40 calculates a similarity (for example, a correlation coefficient) between the two. The waveform (reference waveform and waveform during operation) for which the information processing device 40 calculates the similarity is, for example, a waveform for a predetermined period (for example, a waveform for one period) among the waveforms from which noise is removed in S313. And FIG. 15 shows an example of the reference waveform 1500. FIG. 16 shows an example of a working waveform 1600.

  Note that the reference waveform to be compared in S313 may be a waveform obtained by performing statistical processing (such as averaging) on the reference waveforms accumulated so far.

  The information processing apparatus 40 determines whether the worker 5 has encountered danger based on the similarity calculated in S314 (S315). Specifically, for example, the information processing apparatus 40 determines whether or not the similarity obtained in S314 is equal to or less than a predetermined threshold.

  When the worker 5 encounters danger (S315: YES), the process proceeds to S316, and when the worker 5 does not encounter danger (S315: NO), the process returns to S311.

  In S316, the information processing apparatus 40 is a waveform in the vicinity of the maximum point among the working waveforms compared in S314 (a waveform having a predetermined time width. For example, reference numerals 1601 to 1603 of the working waveform 1600 (FIG. 16)). To get.

  The information processing apparatus 40 determines whether there is a spike-like waveform (for example, reference numeral 1602 in FIG. 16) in the waveform acquired in S316 (S317). Whether or not it is in a spike shape is determined, for example, based on whether or not the acquired waveform has a fluctuation in amplitude (signal intensity) of a predetermined value or more.

  If a spike-like waveform exists (S317: YES), the process proceeds to S318, and if a spike-like waveform does not exist (S317: NO), the process proceeds to S319.

  In S318, the information processing apparatus 40 stores the fact that the worker 5 has encountered a danger of whispering while walking at the selected position. Specifically, the information processing apparatus 40 stores the selected position in the position 471 of the dangerous spot table 470, stores in the contents 472 that the worker 5 has encountered a danger of walking while walking, and sets the number of times 473 The value increased by 1 is stored in the number of times 473. Thereafter, the process proceeds to S319.

  In S319, the information processing apparatus 40 determines whether or not the working waveform at the selected position has a time width disturbance exceeding a predetermined threshold. Specifically, for example, the information processing apparatus 40 makes the determination by obtaining the distribution of the periodic component of the waveform during work. FIG. 17 shows an example of a working waveform 1600 in which it is determined that there is a time width disturbance 1604.

  Returning to S319 in FIG. 14, if there is a time width disturbance in the working waveform (S319: YES), the process proceeds to S320, and if there is no time width disturbance (S319: NO), the process proceeds to S321.

  In S320, the information processing apparatus 40 stores that the worker 5 has encountered a risk of stepping off while walking at the selected position. Specifically, the information processing apparatus 40 stores the selected position in the position 471 of the danger encounter information 470, stores in the contents 472 that the worker 5 has encountered a danger of stepping off while walking, and the number of times 473 A value obtained by incrementing the number of times by 1 is stored in the number of times 473. Thereafter, the process proceeds to S321.

  In S321, the information processing apparatus 40 determines whether or not all dangerous parts have been collected. Specifically, the information processing apparatus 40 determines whether or not the dangerous part has been determined for all the positions registered in both the reference waveform table 450 and the working waveform table 460.

  When all the dangerous places have been collected (S321: YES), the dangerous place collection processing S30 ends. When there is a place where no dangerous places have been collected (S321: NO), the process returns to S311.

  FIG. 18 is a process performed by the dangerous spot information collection system 1 when the notification start 4714 is selected, to notify the worker 5 who is working that the current position is a dangerous spot (hereinafter, dangerous spot notification process). This is a flowchart for explaining (referred to as S40).

  As shown in the figure, the RF tag 10 of the worker 5 who is working transmits a radio signal at any time (for example, at a preset timing) (S411).

  The base station 30 monitors the reception of the radio signal in real time (S412: NO), and when the radio signal is received (S412: YES), information (worker) attached to the received radio signal with position acquisition information Information) is transmitted to the information processing apparatus 40 (S413).

  When the information processing apparatus 40 receives the worker information transmitted from the base station 30 (S414: YES), the information processing apparatus 40 determines whether or not the worker 5 currently exists in the vicinity of the dangerous place (S415). Specifically, in the information processing apparatus 40, the position specifying information included in the worker information received in S414 is registered in the position 471 of the dangerous place table 470, and the number of times 472 exceeds a predetermined threshold. Judge whether or not.

  If the worker 5 currently exists in the vicinity of the dangerous place (S415: YES), the process proceeds to S416. If the worker 5 does not currently exist in the vicinity of the dangerous place (S415: NO), the process returns to S414.

  In S <b> 416, the information processing apparatus 40 acquires risk details in the vicinity of the current position of the worker 5. Specifically, the information processing apparatus 40 extracts all the records in the dangerous place table 470 in which the identifier received in S414 is registered, and among the extracted records, the number of times 473 is a record that is equal to or greater than a predetermined threshold. Information of content 472 is acquired.

  The information processing device 40 transmits a control signal accompanied by the information of the acquired content 472 to the notification device 50 (S417), and then returns to S414. On the other hand, when the notification device 50 receives the control signal (S418), the notification device 50 notifies the operator 5 by voice or text that there is a possibility of encountering the danger indicated by the control signal (S419).

  Note that the information processing device 40 may cause the notification device 50 to notify only the danger that has a high occurrence frequency (or has occurred a number of times exceeding the threshold). The information processing device 40 may cause the notification device 50 to perform notification only when the probability that the worker 5 has encountered danger (for example, the number of dangerous encounters per unit time) exceeds a threshold value. The information processing device 40 stores these results, so that the manager of the work area 3 analyzes the cause of the occurrence of the danger (for example, the danger occurred because the feet were dark). Since the correlation between the physical condition (such as fatigue) of the worker 5 and time can be examined, the occurrence of an accident of the worker 5 can be more effectively prevented.

  As described above, according to the dangerous spot information collection system 1 of the present embodiment, the information processing apparatus 40 uses the output waveform received by the base station 30 when the worker 5 is working as the worker. When it is determined that the worker 5 has encountered danger at the position automatically compared with the reference waveform acquired when 5 is working normally, Stores the fact that the worker 5 has encountered a danger at the acquisition position, so that information necessary to prevent the worker 5 from accidents can be collected easily and in real time. Based on this, the manager of the work area 3 can perform a field survey to improve the work environment.

  In addition, the information processing apparatus 40 accurately determines whether the worker 5 has encountered danger based on the similarity between the output waveform received by the base station 30 and the reference waveform when the worker 5 is working. Can be determined.

  When a spike-like waveform having an amplitude exceeding a predetermined threshold that is not found in the reference waveform is included in the vicinity of the maximum point of the periodic waveform acquired when the worker 5 walks, the waveform There is a high possibility that the worker 5 has encountered a danger of crawling at the position where is acquired. That is, according to the dangerous part information collection system 1 of the present embodiment, it is possible to accurately determine whether or not the worker 5 has encountered a danger of craving at the position where the waveform is acquired.

  In addition, when the periodic waveform acquired when the worker 5 walks includes a disturbance in the cycle having a time width exceeding a predetermined threshold that is not found in the reference waveform, the worker 5 steps out. It is likely that you have encountered a danger. That is, according to the dangerous part information collection system 1 of the present embodiment, it is possible to accurately determine whether or not the worker 5 has encountered a risk of stepping off at the position where the waveform is acquired.

  In addition, according to the dangerous part information collection system 1 of the present embodiment, it is possible to reliably notify the worker 5 that there is a high possibility of encountering a danger around the current position, and to ensure the safety of work on site. be able to.

  Further, according to the dangerous part information collection system 1 of the present embodiment, highly accurate information about the dangerous part can be collected quickly and in large quantities. Therefore, information on a potential danger that cannot be recognized by a person is picked up. It is possible to prevent accidents from occurring.

  In particular, the RF tag 10 has a wide range that can be read by the reader device, and can read information even when it is in a position where it cannot be seen from the reader device, and can read information from many RF tags 10 at a time. High-speed and large-capacity communication is possible from a single reader device to a large number of RF tags 10, information can be easily written, and it can be easily applied to various places such as human legs, arms, and heads. It can be attached, it is easy to ensure durability / water resistance, it can be washed while attached to clothing, etc., and it is inexpensive and easy to use.

  Since the dangerous part information collection system 1 of this embodiment pays attention to the feature of such RF tag 10 and is effectively used for collecting dangerous part information, for example, it is more accurate than a portable terminal or a barcode terminal. It is possible to acquire detailed information easily and in large quantities. In addition, by properly processing the acquired information, it is possible to detect problems that humans cannot recognize, and to prevent accidents before they occur. Is acquired from the RF tags 10 of a large number of subjects, it is possible to detect a problem such that there is an inclination in the passage that is not noticed by a person. In addition, for example, when a phenomenon in which the stride period is shortened at the same place in the passage is acquired from the RF tags 10 of a large number of subjects walking along the passage, it is possible to detect a problem that the passage is narrow enough to hinder walking. it can. It should be noted that in the case of detecting a defect for the subject based on such a slight waveform disturbance, it is not always necessary to perform the above-described pattern matching (such as S314 in the dangerous point collection process S30 in FIG. 14). Any of the waveforms that do not match the basic standard waveform may be statistically processed as abnormal.

  By the way, description of embodiment described above is for making an understanding of this invention easy, and does not limit this invention. It goes without saying that the present invention can be changed and improved without departing from the gist thereof, and that the present invention includes equivalents thereof.

  For example, in addition to the method of acquiring the reference waveform by a process (reference waveform acquisition process S10) different from the acquisition process of the waveform during operation (in-process waveform acquisition process S20) as described in the present embodiment, Of the in-work waveforms acquired in the acquisition process S20, a waveform (for example, a waveform one cycle before the current period) during which no danger was detected in the dangerous part collection process S30 may be used as a reference waveform.

  Further, for example, the RF tag 10 is attached near the head of the worker 5 (such as a helmet), and it is determined that the information processing apparatus 40 includes a spike-like waveform with an amplitude exceeding a predetermined threshold in the waveform during work. In this case, the fact that the worker 5 has encountered the danger of colliding with the head while walking may be stored in association with the position specifying information. Thereby, it can be determined whether or not the worker 5 has encountered a danger of colliding the head during walking at the position where the waveform is acquired.

  Further, for example, the RF tag 10 is attached to a portable tool such as a scaffolding material in the work area 3, and the amplitude exceeding the predetermined threshold that is not found in the reference waveform in the output waveform of the vibration sensor 114 in the information processing apparatus 40. May be stored in association with the position specifying information that the operator 5 has collided with the tools. Thereby, the information processing apparatus 40 can determine which tool the worker 5 collides with, and can determine whether it is dangerous for the worker 5.

  The RF tag 10 may also be attached to structures and tools existing around the tools, and the information processing apparatus 40 may determine the contribution to the occurrence of the accident for each of the structures and tools. (For example, it is obtained by multivariate analysis using the number of collisions with structures or tools as a parameter). Thereby, the manager of the work area 3, for example, details of the relationship between the structure and tools and the cause of the accident of the worker 5 (for example, whether the collision is based on a defect of some structures or tools, Or you can know whether the structure and tools are defective as a whole (whether there is a structural defect). Based on this, the manager or the like can take appropriate measures for the worker 5, the structure, and the tools.

  Further, the information processing apparatus 40 stores in advance the positions of structures (steps, stairs, etc.) existing in the work area 3 and specifies the positions based on the positions and the position specifying information received from the base station 30. When it is determined that the structure exists at the position specified by the information, the fact that the worker 5 has encountered danger may be stored. In this case, if the position locating device described above is used to acquire the position specifying information, for example, the information processing apparatus 40 stores detailed position information such as whether the structure is overhead or underfoot, Position specifying information may be acquired from the orientation device, and it may be determined based on such information whether the danger encountered by the worker 5 is due to an overhead structure or a structure existing under the foot.

  Moreover, the information processing apparatus 40 may transmit information on the danger managed by the information processing apparatus 40, information on the dangerous part, and the like to the RF tag 10, and the RF tag 10 may store the information. Then, the RF tag 10 encounters a danger in the vicinity of the current position of the worker 5 based on the position specifying information acquired from the base station 30 and the like, the contents of the stored danger, and information on the dangerous place. If the position is present, the operator 5 may be notified in real time (notify by light, vibration, etc.) that there is a possibility of encountering the danger of the above contents.

  Further, attribute information (information such as height, weight, age, accident experience, etc.) of the worker 5 who carries it in the RF tag 10 is stored, and the information processing device 40 receives attribute information from the RF tag 10 of the worker 5. And the correlation between the attribute and the frequency of occurrence of the danger may be acquired based on the attribute and the information about the danger content and the dangerous part obtained by the user. Thereby, the manager or the like of the work area 3 can identify the worker 5 having a high probability of danger, and can prompt such a worker 5 to be alerted with priority.

  For example, although the acceleration sensor, the speed sensor, and the displacement sensor are illustrated as the vibration sensor 114 in the above-described embodiment, for example, the direction in which the RF tag 10 exists is captured using an antenna having sufficiently sharp directivity ( Based on the time displacement of the RF tag 10, information equivalent to information obtained from an acceleration sensor, a speed sensor, a displacement sensor, or the like may be acquired. In this case, a system including the RF tag 10 and the antenna functions as the vibration sensor 114.

  Further, for example, the position locating device described above (for example, those disclosed in Japanese Patent Application Laid-Open Nos. 2004-184078, 2005-351877, 2005-351878, and 2006-23261) .)), The position of the RF tag 10 is acquired in real time using a system capable of positioning with high accuracy, such as an acceleration sensor, a speed sensor, a displacement sensor, etc. Information equivalent to that obtained from the above may be obtained. In this case, a system including the position locating device functions as the vibration sensor 114.

  Further, the position of the RF tag 10 is determined by, for example, a method using the strength of the received electric field strength of the radio wave transmitted from the RF tag 10 or a direction in which the electric field strength of the radio wave received from the RF tag 10 is increased. You may make it acquire by other methods, such as the method of calculating | requiring the point where the direction of a beam crosses. Further, the position of the RF tag 10 may be acquired by combining with other position detection means such as a detection value of a GPS, an infrared sensor, a pyroelectric sensor, an ultrasonic sensor, or the like.

DESCRIPTION OF SYMBOLS 1 Risk location information collection system 3 Work area 5 Worker 10 RF tag 30 Base station 40 Information processing apparatus 50 Notification apparatus 113 1st communication apparatus 313 2nd communication apparatus

Claims (7)

A method for collecting information about dangerous spots in a work area,
An operator who performs work in a work area has a vibration sensor and a first communication device that transmits a wireless signal including an output waveform of the vibration sensor,
A plurality of base stations provided with a second communication device along the flow line of the worker in the work area,
An information processing device that communicates with each of the base stations is provided,
The first communication device transmits the wireless signal;
When the base station receives the radio signal, the information processing apparatus adds position specifying information, which is information for specifying the position from which the output waveform is acquired, to the output waveform included in the base station To
The information processing apparatus is
The output waveform acquired when the worker is working normally is stored as a reference waveform in association with the position specifying information of the output waveform,
Whether the worker has encountered a danger by comparing the output waveform received by the base station with the reference waveform corresponding to the position specifying information of the output waveform when the worker is working A method for collecting information on a dangerous point existing in a work area, characterized in that if it is determined whether or not a danger has been encountered, that fact is stored in association with the position specifying information. A method for collecting information on a dangerous spot existing in the work area according to claim 1,
The information processing apparatus is configured such that a similarity between the output waveform received by the base station when the worker is working and the reference waveform corresponding to the position specifying information of the output signal is a predetermined threshold value. A method of collecting information relating to a dangerous point existing in a work area, wherein the worker determines that the worker has encountered a danger. A method for collecting information relating to a dangerous spot existing in the work area according to claim 1 or 2,
The information processing apparatus includes a spike-like waveform having an amplitude exceeding a predetermined threshold that is not found in the reference waveform, in the vicinity of a maximum point of a periodic waveform acquired by the worker walking. A method of collecting information relating to a dangerous location existing in a work area, wherein the fact that the worker has encountered a danger whispering while walking is stored in association with the position specifying information. A method for collecting information relating to a dangerous spot existing in a work area according to any one of claims 1 to 3,
When the periodic waveform acquired by the worker walking includes a period disturbance with a time width exceeding a predetermined threshold that is not found in the reference waveform, A method of collecting information relating to a dangerous point existing in a work area, wherein the fact that a person has encountered a danger of stepping off while walking is stored in association with the position specifying information. A method for collecting information relating to a dangerous spot existing in the work area according to any one of claims 1 to 4,
The vibration sensor is provided near the worker's head,
In the information processing apparatus, when the output waveform of the vibration sensor includes a spike-like waveform with an amplitude exceeding a predetermined threshold that is not found in the reference waveform, the operator collides with the head during walking. A method for collecting information relating to a dangerous location existing in a work area, wherein the information on the occurrence of a danger to be stored is stored in association with the position specifying information. A method for collecting information on a dangerous spot existing in the work area according to claim 1,
A position acquisition device for acquiring the current position of the worker;
A notification device for notifying the worker of the danger,
The information processing device, when there is a position where the worker encounters danger in the vicinity of the worker's current position, informs that there is a possibility of encountering danger by the notification device. A method of collecting information about hazardous locations in the work area. A hazardous location information collection system,
A vibration sensor to be carried by a worker who performs work in a work area, and a first communication device that transmits a radio signal including an output waveform of the vibration sensor;
A plurality of base stations provided with second communication devices, provided along the flow line of the worker in the work area;
An information processing device that communicates with each of the base stations,
The first communication device transmits the wireless signal;
When the base station receives the radio signal, the information processing apparatus adds position specifying information, which is information for specifying the position from which the output waveform is acquired, to the output waveform included in the base station To
The information processing apparatus is
The output waveform acquired when the worker is working normally is stored in association with the position specifying information of the output waveform,
Whether the worker has encountered a danger by comparing the output waveform received by the base station with the reference waveform corresponding to the position specifying information of the output waveform when the worker is working If it is determined whether or not a danger has been encountered, the fact is stored in association with the position specifying information.

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