JP2014025330A - Field worker management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a field worker management system in which a situation of a field worker using a safety belt can be monitored and in a case where an emergency such as injury or illness occurs, safety measures for the worker can also be taken.SOLUTION: When it is detected that a rope pull-out operation of a safety belt 1 is performed, a use detection signal is transmitted to a manager-side terminal 20 and a state of using the safety belt 1 and the number of times of using the safety belt 1 are displayed on a display section 22 of the manager-side terminal 20, such that the situation of a worker using the safety belt 1 can be monitored by a manager. In a case where an emergency such as injury or illness occurs on the worker, when the worker operates an emergency call switch 13, an emergency call signal is transmitted to the manager-side terminal 20 and an emergency call of the safety belt 1 is displayed on the display section 22 of the manager-side terminal 20, such that a manager B can speedily grasp occurrence of the emergency.

Description

  The present invention relates to a site worker management system for monitoring the use status of a safety belt and the occurrence of an emergency situation of a worker at a work site such as construction work.

  Generally, when working at a high place such as a construction site, an operator is required to wear a safety belt to prevent falling. However, depending on the worker, the safety belt may not be used thoroughly, such as not wearing a safety belt or neglecting hooking even if it is worn.

  Therefore, conventionally, a bar code label is attached to the rope of the safety belt rope winder, the bar code label of the rope pulled out from the rope winder is read by a bar code reader, and the identification data of the bar code label is transmitted. It is known that an operator uses a machine and monitors the use status of the worker's safety belt by receiving the transmitted signal with a receiver on the manager side (see, for example, Patent Document 1). .

JP 2002-336367 A

  In the conventional example, since the use situation of the safety belt can be constantly monitored, the worker can be encouraged to use the safety belt, for example, by calling attention to the worker who is not using the safety belt. However, at work sites, in addition to crashes due to the safety band not being used, there may be emergencies such as injury to the worker and poor physical condition. The countermeasures were not sufficient.

  The present invention has been made in view of the above-described problems, and the purpose of the present invention is to monitor the use situation of the safety belt of the field worker and to generate an emergency such as injury or poor physical condition. An object of the present invention is to provide an on-site worker management system capable of taking safety measures for workers.

  In order to achieve the above-mentioned object, the present invention enables use of a safety belt by performing a predetermined operation on the safety belt in a field worker management system for managing workers using the safety belt at a work site. An operation detection means for detecting, an operation detection signal transmission means for transmitting an operation detection signal to the administrator side terminal by radio when the operation detection means detects that the operation has been performed, and an operation detection signal transmission means The operation detection signal receiving means for receiving the operation detection signal transmitted by the administrator side terminal, and the predetermined safety band usage status information based on the operation detection signal received by the operation detection signal receiving means Usage status information display means to be displayed on the safety zone, an emergency call switch that can be operated arbitrarily by the operator, and when the emergency call switch is operated, An emergency call signal transmitting means for wirelessly outputting a report signal to the administrator side terminal, an emergency call signal receiving means for receiving the emergency call signal transmitted by the emergency call signal transmitting means at the administrator side terminal, and an emergency call Emergency notification information output means for outputting predetermined emergency call information from the administrator side terminal based on the emergency call signal received by the signal receiving means.

  As a result, when it is detected by the operation detecting means that the operation has been performed, it is assumed that the worker at the work site is using the safety belt, and a use detection signal is transmitted to the administrator side terminal to Since the usage status information of the belt is displayed on the administrator side terminal, the usage status of the worker's safety belt can be constantly monitored by the administrator. Also, when an emergency situation such as injury or poor physical condition of the worker occurs at the work site, when the operator operates the emergency call, an emergency call signal is transmitted to the administrator terminal, and the emergency call information is sent to the administrator. Since it is output from the terminal on the side, the administrator can quickly grasp the occurrence of an emergency situation in the operator.

  According to the present invention, it is possible to monitor a worker's use of a safety belt at a work site. For example, a worker who is not using a safety belt is encouraged to use a safety belt, or a safety belt is used. It is possible to take preventive measures against crashes caused by non-use of safety belts, such as calling attention to workers who use the machine less frequently. In addition, even in the event of an emergency such as an injury or poor physical condition, the administrator can quickly grasp the occurrence of an emergency in the worker, so it is appropriate for the worker who has experienced an emergency. Can take the right action.

The perspective view of the safety belt which shows the 1st Embodiment of this invention Perspective view of main part of safety belt and operator terminal Perspective view of the administrator terminal Schematic side cross-sectional view of a rope winder Block diagram of field worker management system Schematic showing the usage status of the on-site worker management system The flowchart which shows operation | movement of a 1st control part. The flowchart which shows operation | movement of a 1st control part. The flowchart which shows operation | movement of a 1st control part. The flowchart which shows operation | movement of a 2nd control part. The flowchart which shows operation | movement of a 2nd control part. The flowchart which shows operation | movement of a 2nd control part. Front view showing the display screen of the display Front view showing the display screen of the display showing the emergency call display Front view showing the display screen of the display showing the temperature alarm display The block diagram of the field worker management system which shows the 2nd Embodiment of this invention Fall sensor block diagram The flowchart which shows operation | movement of a 2nd control part. The flowchart which shows operation | movement of a 2nd control part. The flowchart which shows operation | movement of a 2nd control part. Flow chart showing operation of sensor control unit Schematic showing the direction of acceleration and angular velocity Diagram showing storage range of angular velocity Diagram showing an example of change in angular velocity The figure which shows the other example of the change of angular velocity Diagram showing change in angular velocity of increasing trend Diagram showing change in angular velocity of decreasing trend The figure which shows the judgment method of the increase tendency and decrease tendency of angular velocity Schematic showing the usage status of the on-site worker management system Front view showing the display screen of the display Front view showing the display screen of the display showing the emergency call display and temperature alarm display Front view showing the display screen of the display showing the fall detection display

  1 to 15 show a first embodiment of the present invention, which relates to a site worker management system used at a work site such as construction work.

  A safety belt 1 shown in the figure includes a torso belt 2 attached to an operator, a rope 3 extending from the torso belt 2, a hook 4 attached to the tip of the rope 3, and a rope winder that winds the rope 3 5.

  The rope 3 is formed in a flat band shape having a predetermined length (for example, 1.7 m), and is made of, for example, a high-strength aramid fiber.

  The hook 4 has a known configuration that can be connected to the master rope at the work site, and is stored in a storage bag 2a provided on the torso belt 2 when it is removed from the master rope. The hook 4 has a hook body 4a curved in a substantially U shape, and a movable portion 4b that opens and closes an open portion of the hook body 4a. The movable portion 4b is locked by a lock mechanism (not shown), and the operation of the movable portion 4b is performed. When the part 4c is operated, the movable part 4b is unlocked.

  The rope winder 5 has a well-known structure for winding the rope 3 around a reel 5b provided in the winder body 5a, and the winder body 5a is attached to a predetermined position of the body belt 2. The rope winder 5 includes a spring (not shown) that urges the reel 5b rotatably supported by the support shaft 5c in the winding direction. When the rope 3 is pulled out from the winder body 5a, the rope winder 5 is illustrated. The rope 3 is held in the pulled-out position by a stopper mechanism that does not. Further, when an operation portion (not shown) provided on the winder main body 5a is operated, the stopper mechanism is released, the reel 5b is rotated in the winding direction by a spring, and the rope 3 is moved into the winder main body 5a. It is designed to be wound up.

  The field worker management system according to the present embodiment includes a worker-side terminal 10 disposed on the worker side wearing the safety belt 1 and a manager-side terminal 20 disposed on the manager side. One manager A performs safety management of a plurality of workers B at the construction site.

  The worker side terminal 10 is provided in the rope winder 5 of the safety belt 1 and includes a terminal body 10a provided on the lower end side of the winder body 5a. The operator-side terminal 10 includes a transmitter 11 that wirelessly transmits a signal to the administrator-side terminal 20, and an operation detection unit that detects that the rope 3 has been pulled out from the rope winder 5. As a rope pull-out sensor 12, an emergency call switch 13 that can be arbitrarily operated by the worker A wearing the safety belt 1, a temperature sensor 14 that detects the temperature around the safety belt 1, and the user A A voice output unit 15 serving as a warning means for outputting a message for preventing a high temperature failure as a warning, and a first control unit 16 for controlling the operation of the worker terminal 10 are provided. It is driven by a rechargeable battery (not shown). The transmitter 11 and the first control unit 16 constitute an operation detection signal transmission unit, an emergency notification signal transmission unit, and a temperature alarm signal transmission unit.

  The rope pull-out sensor 12 is a non-contact type distance sensor that detects a change in the distance from the outer peripheral surface of the rope 3 wound around the reel 5b of the rope winder 5 to a predetermined position. A distance sensor is used. The rope pull-out sensor 12 includes a light emitting unit 12a and a light receiving unit 12b that are opposed to the outer peripheral surface of the rope 3 at a predetermined distance, and light emitted from the light emitting unit 12a is reflected by the outer peripheral surface of the rope 3 and is reflected on the light receiving unit 12b. By being input, the distance L to the outer peripheral surface of the rope 3 is detected. That is, as shown in FIG. 4 (a), the outer diameter D of the rope 3 wound around the reel 5b changes according to the pull-out length of the rope 3, so that the detection distance L of the rope pull-out sensor 12 is the rope 3 Increases as the outer diameter D of the rope 3 increases, and increases as the outer diameter D of the rope 3 decreases.

  The emergency call switch 13 is a known push button switch, and is provided on the front surface of the terminal body 10a.

  The temperature sensor 14 includes a known device such as a thermistor and is provided on the lower surface of the terminal body 10a.

  The audio output unit 15 includes an audio storage unit 15a in which an audio message is stored, and a speaker 15b that outputs the audio message of the audio storage unit 15a. The audio signal of the audio storage unit 15a is amplified by the amplifier 5c, and the speaker 15b. To output. The voice storage unit 15a is composed of a storage device such as a voice synthesis IC, and as a voice message to prevent high-temperature injury (heatstroke or sunstroke) at work sites under high temperatures, for example, “Please check if measures against heatstroke are sufficient. "Is stored. The speaker 15b is configured to output sound to the outside through a through hole 10b provided in the front surface of the terminal body 10a.

  The first control unit 16 includes a microcomputer connected to the transmitter 11, the rope drawer sensor 12, the emergency call switch 13, the temperature sensor 14, and the voice output unit 15, and when detecting the drawer operation by the rope drawer sensor 12, A usage detection signal is transmitted from the transmitter 11 assuming that the safety belt 1 is used. Further, the first control unit 16 is configured to transmit an emergency notification signal from the transmitter 11 when the emergency notification switch 13 is operated. Further, the first control unit 16 controls the sound output unit 15 based on the temperature detected by the temperature sensor 14 and transmits a temperature alarm signal corresponding to the temperature detected by the temperature sensor 14 from the transmitter 11. ing.

  The administrator-side terminal 20 includes a thin, rectangular terminal body 20a, and is carried by the administrator B. The administrator-side terminal 20 includes a receiver 21 that receives a radio signal from the worker-side terminal 10, a display unit 22 that displays the safety band usage status of the worker A, an emergency notification display, a temperature alarm display, and the like. A buzzer 23 for outputting an alarm sound in response to an emergency call, an emergency call display on the display unit 22, a release switch 24 for releasing the operation of the buzzer 23, and a second for controlling the operation of the administrator terminal 20 The administrator terminal 20 is driven by a rechargeable battery (not shown). The receiver 21 and the second control unit 25 constitute an operation detection signal receiving unit, an emergency notification signal receiving unit, and a temperature alarm signal receiving unit.

  The display unit 22 includes a known display device such as a liquid crystal display, and is provided on the front surface of the terminal body 20a. On the screen of the display unit 22, as shown in FIG. 13, the number display 22a of the safety belt 1 used by the worker A, “◯” indicating the state where the safety belt 1 is used, and the state where it is not used A usage state display 22b for displaying any one of “X”, a usage count display 22c for indicating the usage count of the safety belt 1, a battery residual amount display 22d for indicating the battery residual amount of the operator terminal 10; A radio field intensity display 22e indicating the radio field intensity of the operator terminal 10, an emergency report display 22f displayed when an emergency report is received, and a temperature alarm display 22g displayed when a temperature alarm signal is received. It is supposed to be displayed. The display unit 22 constitutes usage status information display means and temperature alarm information display means.

  The buzzer 23 is composed of a known device that emits a predetermined sound such as an electronic sound, and outputs a warning sound that notifies an emergency call. The display unit 22 and the buzzer 23 constitute an emergency call information output unit.

  The release switch 24 is a known push button switch, and is provided on the front surface of the terminal body 20a.

  The second control unit 25 includes a microcomputer connected to the receiver 21, the display unit 22, the buzzer 23, and the release switch 24. The signal received from the operator terminal 10 received by the receiver 21 or the release switch 24. The display unit 22 and the buzzer 23 are controlled according to the operation.

  In the field worker management system configured as described above, as shown in FIG. 6, for example, a plurality of workers A wearing safety belts 1 are arranged on each floor F of a building under construction, and each worker Administrator B performs safety management on A. At that time, a signal transmitted from the worker side terminal 10 of each worker A is received by the manager side terminal 20 of the manager B, and the safety band usage status of each worker A is received by the manager side terminal 20. Safety management is performed. At the work site, at least one repeater 30 that relays radio waves is installed, and when the distance between the operator terminal 10 and the administrator terminal 20 is a long distance, the radio waves are blocked. Even when there is an obstacle, radio waves can reach the manager terminal 20 from the worker terminal 10 via the repeater 30.

  Here, the operation of the first control unit 16 will be described with reference to FIGS. 7 to 9.

  First, when the worker A wears the safety belt 1 and the rope 3 is pulled out from the rope winder 5 as shown in FIG. 4 (b), the detection value L of the rope pull-out sensor 12 becomes a predetermined rope pull-out. When the distance is longer than the distance L1 corresponding to the outer diameter D1 of the rope 3 when the length (for example, 50 cm) is reached (S1), it is assumed that the worker A is using the safety belt 1, and a use detection signal is transmitted to the transmitter. 11 (S2). At that time, information on the remaining battery level and the radio wave intensity is also transmitted together with the use detection signal. Next, when the operator A removes the hook 4 of the safety belt 1 from the master rope, when the rope 3 is wound around the rope winder 5, the detection value L of the rope pull-out sensor 12 becomes smaller than the distance L1. When it becomes smaller (S3), it is assumed that the worker A is not using the safety belt 1, and a use detection cancellation signal is transmitted from the transmitter 11 (S4). When an emergency such as injury or poor physical condition of the worker A occurs at the work site and the emergency call switch 13 is operated by the worker A (S5), an emergency call signal is transmitted from the transmitter 11 ( S6). Furthermore, when the temperature at the work site is high and the temperature T detected by the temperature sensor 14 is equal to or higher than a predetermined temperature T1 (for example, 27 ° C.) (S7), a temperature alarm signal is transmitted from the transmitter 11 (S8), A voice message is output by the voice output unit 15 (S9). Here, even after a predetermined waiting time (for example, 30 minutes) has passed (S10), if the detected temperature T of the temperature sensor 14 does not become lower than the temperature T1 (S11), the process returns to step S9, and again the voice message Is output. If the temperature T detected by the temperature sensor 14 is lower than the temperature T1 in step S11, a temperature alarm signal is transmitted from the transmitter 11 (S12), and the process returns to step S7.

  Next, the operation of the second control unit 16 will be described with reference to FIGS. 10 to 12.

  First, the number of uses N of all safety belts 1 is set to an initial value “0” (S20), and the number of use times 22c of all safety belts 1 on the display unit 22 is set to “00” (S21). The usage status display 22b of the safety zone 1 is set to “x” (S22).

  Here, when a use detection signal is received from any operator terminal 10 (S23), the number of the safety zone 1 is determined (S24), and the usage status display 22b of the safety zone 1 is set to “◯”. (S25). Further, “1” is added to the number of uses N of the safety zone 1 (S26), the number of uses N is stored (S27), and the use number display 22c is updated to “N + 1” (for example, “01”). (S28). Furthermore, based on the remaining battery level information and the radio wave intensity information received together with the use detection signal, the remaining battery level display 22d and the radio field intensity display 22e are updated (S29, S30). Thereafter, when a use detection release signal is received from the worker side terminal 10 in the safety zone 1 (S31), the process returns to step S22, and the usage status display 22b of the safety zone 1 is set to “x”. The operation is performed for each safety zone 1.

  Further, when an emergency call signal is received from any one of the terminal devices 10 (S32), the number of the safety zone 1 is determined (S33), and as shown in FIG. Is displayed (S34), and a warning sound is output from the buzzer 23 (S35). When the release switch 24 is operated by the administrator B (S36), the emergency call display 22f is released (S37), and the warning sound output by the buzzer 23 is stopped (S38), and then step S32 Return to.

  Further, when a temperature alarm signal is received from any of the operator terminals 10 (S39), the number of the safety zone 1 is determined (S40), and as shown in FIG. Is displayed (S41). Thereafter, when a temperature alarm cancellation signal is received from the operator terminal 10 (S42), the display of the temperature alarm display 22g is canceled (S43), and the process returns to step S39.

  Thus, according to the present embodiment, the worker-side terminal 10 disposed on the worker A side who uses the safety belt 1 and the management disposed on the manager B side who manages the safety of the worker A When it is detected that the pull-out operation of the rope 3 is performed with respect to the rope winder 5 of the safety belt 1, the worker A is using the safety belt 1. A use detection signal is transmitted from the worker side terminal 10 to the administrator side terminal 20, and the use state display 22b and the use frequency display 22c of the safety zone 1 are displayed on the display unit 22 of the administrator side terminal 20. Therefore, the usage status of the safety belt 1 of each worker A can be constantly monitored by the manager B. For example, the operator A who has displayed “x” for a long time on the usage status display 22b is prompted to use the safety belt 1, or It is possible to take measures to prevent a crash due to the safety band not being used, such as calling attention after completion.

  Further, the emergency call switch 13 that can be arbitrarily operated by the worker A is provided. When an emergency such as injury or poor physical condition of the worker A occurs at the work site, the worker A operates the emergency call switch 13. Then, an emergency call signal is transmitted from the worker side terminal 10 to the manager side terminal 20, and the emergency call display 22f of the safety zone 1 is displayed on the display unit 22 of the manager side terminal 20, and the buzzer 23 Since the warning sound is output, the manager B can quickly grasp the occurrence of the emergency situation in the worker A, and can take appropriate measures for the worker A in which the emergency situation has occurred. .

  Furthermore, a temperature sensor 14 for detecting the ambient temperature of the safety zone 1 is provided. When the detected temperature T of the temperature sensor 14 is equal to or higher than a predetermined temperature T1, a voice message for preventing a high temperature failure at a high temperature work site is sent to the worker. Since it is output from the side terminal 10, for example, even when the temperature of the work site becomes high in summer, for example, it is possible to give the worker A attention to prevent heat stroke and sunstroke. It is effective for measures against heat. In place of the voice message, an alarm by a buzzer or the like may be output.

  When the detected temperature T of the temperature sensor 14 is equal to or higher than the predetermined temperature T1, a temperature alarm signal is transmitted from the operator terminal 10 to the administrator terminal 20, and the temperature alarm display 22g of the safety zone 1 is displayed on the administrator. Since the information is displayed on the display unit 22 of the side terminal 20, the manager B can perform safety management for preventing the high temperature failure of the worker A, and can further strengthen the heat countermeasure. .

Further, the size of the outer diameter D of the rope 3 wound around the rope winder 5 is detected by a rope pull-out sensor 12 comprising a non-contact distance sensor, and the rope 3 is pulled out from the rope winder 5. Accordingly, when it is detected that the outer diameter D of the rope 3 is less than or equal to the predetermined outer diameter D1, a use detection signal is transmitted from the operator terminal 10, so that the processing and structure of the rope winder 5 can be improved. The use of the safety belt 1 can be detected without changing, and the use detection means of the safety belt 1 can be easily added to the existing rope winder 5. In addition, in the case where a barcode label attached to a predetermined position of a rope is read by a barcode reader as in the conventional example, the barcode label is likely to be damaged during work in the field. Since the rope pull-out sensor 12 detects the size of the outer diameter D of 3, the object to be detected such as a bar code label does not need to be attached to the rope, and the rope can be pulled out due to damage to the object to be detected. There is an advantage that it does not become undetectable.

  In the above-described embodiment, the use of the safety belt 1 is detected by the rope pull-out operation of the rope winder 5. However, as a predetermined operation for the safety belt 1, for example, the operation of the hook 4 is detected. For example, other operations may be detected.

  In the embodiment, when the temperature around the safety zone 1 is detected by the temperature sensor 14, a voice message for preventing a high temperature failure is output, and the temperature alarm display 22 g is displayed on the display unit 22 of the administrator-side terminal 20. Although the display is shown, when such a heat countermeasure function is not required, for example, when used in a cold region, the temperature sensor 14 and the configuration related thereto are omitted. Also good.

  FIGS. 16 to 32 show a second embodiment of the present invention, and the same reference numerals are given to the same components as those of the above-described embodiment.

  The field worker management system of the present embodiment includes a worker terminal 10 arranged on the user side of the safety belt 1, a manager terminal 20 arranged on the manager side, and a worker terminal. 10 and the administrator-side terminal 20, a repeater 30 that relays radio waves, a screen display 40 that is installed at a predetermined position on the work site, and an office-side terminal 50 that is arranged at the site office J. And an entrance / exit detector 60 as an entrance / exit detector for detecting the entrance / exit of the worker.

  In addition to the configuration of the first embodiment, the worker-side terminal 10 includes a fall detection sensor 17 as a fall detection unit that detects the fall of the worker. The fall detection sensor 17 includes an acceleration sensor 17 a, an angular velocity sensor 17 b, a storage unit 17 c, and a sensor control unit 17 d, and the sensor control unit 17 d is connected to the first control unit 16. The transmitter 11 and the first control unit 16 constitute a fall detection signal transmission unit in addition to the configuration of the first embodiment.

  As shown in FIGS. 30 to 32, the display unit 22 of the worker terminal 10 includes a safety band 1 number display 22a, a usage status display 22b, a usage count display 22c, a battery remaining capacity, and the like as in the first embodiment. In addition to the quantity display 22d, the radio wave intensity display 22e, the emergency notification display 22f, and the temperature alarm display 22g, the usage time display 22h indicating the total time during which the safety zone 1 has been used, and the worker A has entered the work site. An admission detection display 22i indicating that the operator A has fallen and a fall detection display 22j indicating that the worker A has been detected to fall are displayed. The display unit 22 constitutes an entrance / exit information output unit and a fall detection information output unit in addition to the configuration of the first embodiment.

  In addition to the configuration of the above-described embodiment, the manager-side terminal 20 displays the same information as the information displayed on the display unit 22 such as the safety band usage status of the worker A, the emergency notification display, the temperature alarm display, etc. A transmitter 26 that transmits to the office terminal 50 by radio is provided.

  The screen display 40 is composed of, for example, a well-known large-screen monitor that can be installed outdoors, and is provided at a place where personnel at the work site can arbitrarily see. The screen display 40 includes a receiver 41 that receives a signal from the administrator-side terminal 20 and a display unit 42 that displays safety band usage status information transmitted from the administrator-side terminal 20.

  The office-side terminal 50 includes a receiver 51 that receives a signal from the administrator-side terminal 20 and a personal computer 52 connected to the administrator-side terminal 20, and is transmitted from the administrator-side terminal 20. The safety band usage status information to be displayed is displayed on the display of the personal computer 52.

  The entrance / exit detection unit 60 includes a well-known RFID tag 61 provided in the administrator-side terminal 20, a well-known tag reader 62 that reads information stored in the RFID tag 61, and an entrance / exit detection signal based on information read by the tag reader 62. The tag reader 62 is provided on the gate pole G installed at the entrance / exit of the work site. The receiver 21, the display 22 and the second control unit 25 of the administrator side terminal 20 constitute an entrance / exit detection signal receiving means and an entrance / exit information output means.

  In the field worker management system configured as described above, as in the first embodiment, as shown in FIG. 29, for example, a plurality of workers wearing safety belts 1 on each floor F of a building under construction work. A is arranged, and the administrator B performs safety management for each worker A. At that time, a signal transmitted from the worker side terminal 10 of each worker A is received by the manager side terminal 20 of the manager B, and the safety band usage status of each worker A is received by the manager side terminal 20. Safety management is performed. At the same time, safety zone use status information is transmitted from the administrator side terminal 20 to the screen display 40 and the office side terminal 50, and safety management is also performed by the screen display 40 and the office side terminal 50. As in the first embodiment, at least one repeater 30 that relays radio waves is installed at the work site, and the distance between the operator terminal 10 and the administrator terminal 20 is long. Even if there are obstacles that block radio waves in some cases, radio waves can reach the manager side terminal 20 from the worker side terminal 10 via the repeater 30. The entrance / exit at the work site is managed by the entrance / exit detection unit 60 and the administrator-side terminal 20.

  Hereinafter, the operation of the control system in the field worker management system of the present embodiment will be described with reference to FIGS.

  First, when the worker A wearing the safety belt 1 passes through the gate pillar G at the entrance / exit from the outside of the work site and enters the work site, the RFID tag 61 of the worker A is detected by the tag reader 62 of the gate pillar G. The entrance / exit detection signal is transmitted from the transmitter 63. When receiving the entrance / exit detection signal transmitted from the entrance / exit detection unit 60 (S50), the second control unit 16 of the administrator-side terminal 20 determines the number of the safety zone 1 (S51), and the safety zone 1 is switched from “non-display” to “display” (S52). When the worker A leaves the work site, the RFID tag 61 of the worker A is detected by the tag reader 62, and an entry / exit detection signal is transmitted from the transmitter 63 again. Accordingly, when the second control unit 16 of the administrator-side terminal 20 receives the entrance / exit detection signal transmitted from the entrance / exit detection unit 60 (S50), it determines the number of the safety zone 1 (S51), The entrance detection display 22i in the safety zone 1 is switched from “display” to “non-display” (S52).

  Next, the second control unit 16 of the administrator-side terminal 20 first sets the number of uses N and use time M of all safety zones 1 to initial values “0” (S60, S61), and the display unit 22 The number-of-uses display 22c of all safety zones 1 is set to “00” (S62). Next, the timer (not shown) is reset to set the usage time (minutes) of all safety zones 1 to “000” (S63), and the timer count is started (S64), and the usage status display of all safety zones 1 is displayed. 22b is changed to “x” (S65).

  Here, when a use detection signal is received from any operator terminal 10 (S66), the number of the safety zone 1 is determined (S67), and the usage status display 22b of the safety zone 1 is set to “◯”. (S68). Further, “1” is added to the number of uses N of the safety zone 1 (S69), the number of uses N is stored (S70), and the use number display 22c is updated to “N + 1” (for example, “01”). (S71). Next, the time measured by the timer is stored as the use start time Ma (S72). Furthermore, based on the remaining battery level information and the radio wave intensity information received together with the usage detection signal, the remaining battery level display 22d and the radio field intensity display 22e are updated (S73, S74). Thereafter, when a use detection release signal is received from the worker side terminal 10 in the safety zone 1 (S75), the time measured by the timer is set as the use end time Mb, and the use start time Ma and the use end time stored in step S72. The difference from Mb is calculated as the usage elapsed time M1 (S76). Subsequently, the usage elapsed time M1 is added to the usage time M of the safety zone 1 (S77). For example, if the usage time M is 12 minutes, the usage time display 22h is updated to "012" (S78). In this case, since the usage elapsed time M1 from the next time is added to the usage time M, the usage time display 22h displays the total time using the safety zone 1. Thereafter, the process returns to step S65, and the use state display 22b of the safety zone 1 is set to “x”. The operation is performed for each safety zone 1.

  Further, when an emergency notification signal or a temperature alarm signal is received from the operator terminal 10, an emergency notification display 22f or a temperature alarm display 22g is displayed on the display unit 22, as shown in FIG. The operations relating to the display of the emergency notification display 22f and the temperature alarm display 22g are the same as those in the first embodiment, and are therefore omitted.

  On the other hand, when the worker A falls down due to an accident during work or the like, when a fall detection signal is received from any worker terminal 10 (S80), the number of the safety belt 1 is determined (S81). As shown at 33, the fall detection display 22j of the safety zone 1 is displayed (S82), and a warning sound is output from the buzzer 23 (S83). Here, when the release switch 24 is operated by the administrator B (S84), the display of the fall detection display 22j is released (S85), and output of the warning sound by the buzzer 23 is stopped (S86), and then step S80. Return to.

  Next, the operation of the sensor control unit 17d of the fall detection sensor 17 will be described with reference to the flowchart of FIG.

  First, accelerations Gx, Gy, Gz are detected by the acceleration sensor 4 (S90), and angular velocities Ωx, Ωy, Ωz are detected by the angular velocity sensor 5 (S91), and the angular velocities Ωx, Ωy, Ωz are stored in the storage unit 17c. (S92). At this time, when the latest angular velocity value is stored in the storage unit 17c, the oldest angular velocity value is deleted from the storage unit 17c. Next, when all the absolute values | Gxyz | of the accelerations Gx, Gy, Gz are smaller than a predetermined reference value Gi (S93), after waiting for a predetermined time (for example, 0.01 seconds) (S94). ), “1” is added to the counter value C (initial value = 0) (S95). Here, if the counter value C does not reach the predetermined set value C1 (S96) and the absolute value | Ωxyz | of any one of the angular velocities Ωx, Ωy, Ωz is greater than the predetermined reference value Ωa ( S97), the integral values ΣΩx, ΣΩy, ΣΩz obtained by integrating the angular velocity values stored in the storage unit 17c until the predetermined time T before the latest angular velocity detection is calculated, and any one of the absolute values | ΣΩxyz | Is greater than the reference value Ωi (S98) and the angular velocity tends to increase (S99), it is determined that the human body has fallen, and the fall detection signal is sent to the first control unit of the operator terminal 10 16 (S100).

  In step S97, if the absolute values | Ωxyz | of the angular velocities Ωx, Ωy, Ωz are equal to or less than the reference value Ωa, or the absolute values | ΣΩxyz | of the angular velocity integral values ΣΩx, ΣΩy, ΣΩz in the step S98 If it is equal to or less than the value Ωi, or if the angular velocity is not increasing in step S99, the process returns to step S90 and the operations in steps S90 to S99 are repeated. At this time, if at least one of the absolute values | Gxyz | becomes equal to or greater than the predetermined reference value Gi in step S93, the counter value C is reset to “0” (S101), and the process returns to step S90. When the counter value C reaches the set value C1 in step S96 (when the state of | Gxyz | <Gi continues for a predetermined time or more), for example, when the human body falls in an upright state, the inclination of the body is changed. It is determined that the vehicle has crashed without being accompanied, and a fall detection signal is output to the first control unit 16 of the worker terminal 10 as with the fall (S100).

  The acceleration reference value Gi is set to a value equal to or lower than the gravitational acceleration. If the worker A falls into a state equivalent to free fall due to a fall or the like, the absolute value | Gxyz | of all the detected values is greater than the reference value Gi. Get smaller. If it is determined that the vehicle has fallen only by this, the acceleration may be smaller than the reference value Gi due to an operation other than the fall, such as when jumping or jumping over a slight step. Therefore, since an angular velocity is generated in either direction at the time of the fall, it is determined that the fall has occurred only when the absolute value of the acceleration is smaller than the reference value Gi and the absolute value of the angular velocity is larger than the reference value Ωa. The operation due to the movement of is reduced.

  Even in such a case, the aforementioned determination condition may be met instantaneously due to a sudden change in posture. Therefore, the angular velocity value is integrated up to a predetermined time t before the latest angular velocity is detected and corresponds to the inclination angle. The integral value to be calculated is calculated, and it is determined that the fall has occurred only when the absolute value | ΣΩxyz | is larger than a predetermined reference value Ωi. That is, when the vehicle actually falls, the angular velocity value gradually increases before the angular velocity becomes larger than the reference value Ω1, as shown in FIG. 24. However, in the case of a sudden change in posture other than the fall, as shown in FIG. In addition, since the angular velocity value increases instantaneously immediately before it becomes larger than the reference value Ωa, by adding the integrated value of the angular velocity value to the judgment condition, the discrimination accuracy between the fall and the operation other than the fall is increased. In this case, since the operating condition is determined based on an integral value obtained by integrating the past angular velocity values for a predetermined time t from the time of detecting the latest angular velocity, it is not necessary to intentionally delay the determination time, and the acceleration and the angular velocity are determined. If the condition is met, a fall detection signal is output.

  Note that, when the angle is obtained by integrating the angular velocity, the offset component of the angular velocity sensor 17b is added, and the integrated value may increase despite the fact that there is no change in the angle. Since the oldest angular velocity value is deleted each time the latest angular velocity value is stored, the offset component of the angular velocity sensor 17b becomes a constant value, and the integrated value does not increase even in a stationary state.

  Furthermore, in this embodiment, even when the determination condition based on the magnitude of acceleration and angular velocity is satisfied as described above, it is determined that the vehicle falls over only when the angular velocity tends to increase. For example, in the case of falling backward, the angular velocity toward the rear increases, and the operation to try to fall backward continues, so the angular velocity at the time of determination tends to increase. That is, as shown in FIG. 26, after the acceleration becomes smaller than the reference value Gi at the time point P, the angular velocity also tends to increase when the angular velocity reaches the reference value Ω1, so it is determined that the vehicle has fallen. On the other hand, as an operation other than a fall, for example, the angular velocity to the rear increases even if it rises vigorously from a forward bent state, but the operation to fall backward does not continue after standing up, so the angular velocity at the time of determination is It tends to decrease. That is, as shown in FIG. 27, after the angular velocity reaches the reference value Ω1 before the acceleration becomes smaller than the reference value Gi, the angular velocity changes from an increasing tendency to a decreasing tendency, and at time P, the acceleration becomes lower than the reference value Gi. If the angular velocity at that time is larger than the reference value Ω1, the angular velocity tends to decrease and is not determined to fall.

  Further, as shown in FIG. 28, the determination as to whether or not the angular velocity is increasing is performed by integrating the angular velocity value from the latest detection time m to the first detection time a before the predetermined first range R1. This is performed by comparing the value and the value obtained by integrating the angular velocity value from the first detection time a to the second detection time b before the predetermined second range R2. That is, when detecting the angular velocity Ωy in the front-rear direction, the integrated value of the past two sections from the stored angular velocity data Ωy (m), that is, the integrated value ΣΩy (ma) of the first range R1, and the second range R2 The difference from the integral value ΣΩy (ab) is calculated, and it is determined whether the difference is a positive value or a negative value (for example, a is a time before 0.1 second and b is a time before 0.2 second) And). In this case, if the values of a and b are set so that the first range R1 and the second range R2 are the same, the sign of the difference between ΣΩy (ma) and ΣΩy (ab) and the value of ΣΩy (m) It becomes possible to determine whether the inclination of the body is increasing or decreasing. For example, when ΣΩy (m) <− Ωiy, it can be seen that the change in the body is tilted backward, and when ΣΩy (ma) −ΣΩy (ab) <0, the tilting speed (angular velocity around the Y axis). ) Is increasing. On the other hand, when ΣΩy (m) <− Ωiy, and ΣΩy (ma) −ΣΩy (ab)> 0, the backward tilting speed (angular speed around the Y axis) may be decreasing. Recognize. The same applies to the detection of the angular velocity Ωx around the X axis.

  As described above, according to the present embodiment, the fall detection sensor 17 that detects the fall of the worker A is provided, and when the worker A falls down at the work site, the worker side terminal 10 changes to the manager side terminal 20. Since the fall detection signal is transmitted and the fall detection display 22j of the safety zone 1 is displayed on the display unit 22 of the administrator-side terminal 20, a warning sound is output by the buzzer 23. The administrator B can quickly grasp the occurrence of the accident. For example, when the worker A has been seriously injured due to a fall accident, or when the consciousness has become unconscious due to severe heat stroke, the operator A himself / herself has the emergency call switch 13 This is effective when cannot be pressed.

  In addition, the fall detection sensor 17 includes an acceleration sensor 17a that detects acceleration in the three-axis directions of the human body and an angular velocity sensor 17b that detects angular velocities around the three axes of the human body. Can be detected.

  In this case, when the absolute value of the acceleration detected by the acceleration sensor 17a is smaller than a predetermined value and the absolute value of the angular velocity detected by the angular velocity sensor 17b is larger than a predetermined value, the storage unit 17c The angular velocity value stored in is integrated from the latest detection time until the detection time before a predetermined range (predetermined by a predetermined time T), the absolute value of the integration value is larger than the predetermined value, and the angular velocity tends to increase Since the fall detection signal is output in the case of, the angular velocity gradually increases like an actual fall, and the angular velocity increases momentarily like a sudden posture change other than a fall Can be discriminated with high accuracy based on the integrated value of the angular velocity, which is extremely effective in reducing the number of operations caused by operations other than falling. In addition, since it is not necessary to intentionally delay the determination time in order to prevent an operation due to an operation other than a fall, it is possible to accurately cope with various fall situations.

  Further, since only the angular velocity values detected from the latest angular velocity detection to a predetermined time t before are stored in the storage unit 17c, the capacity of the storage unit 17c can be reduced, the structure is simplified and the cost is reduced. Can be achieved.

  Furthermore, even if the determination condition based on the magnitude of acceleration and angular velocity is satisfied, the fall is determined only when the angular velocity tends to increase. For example, the falling that causes the angular velocity to increase as in the case of falling backward, for example. The motion and the non-falling motion in which the angular velocity tends to decrease, for example, when the player wakes up vigorously from the forward bent state can be accurately determined, and the motion due to the motion other than the fall can be reduced.

  In this case, the value obtained by integrating the angular velocity value from the latest detection time m to the first detection time a preceding the predetermined first range R1, and the angular velocity value from the first detection time a to the predetermined second range. Since it is determined whether or not the angular velocity tends to increase by comparing with the value integrated up to the second detection time b before R2, the determination accuracy is reduced due to an instantaneous change in the angular velocity. In addition to being able to prevent this, the angular velocity value data stored in the storage unit 17c can be used to determine the increasing tendency and decreasing tendency of the angular velocity, and the control program can be simplified.

  In addition, since safety zone usage status information similar to that of the terminal 20 on the administrator side is displayed on the screen display 40 that is a large screen monitor installed at a predetermined position on the work site, the personnel on the work site can display the screen. By visually observing the container 40, it is possible to easily confirm the use status of each worker A's safety belt. As a result, the safety belt usage status of the worker A is announced not only to the manager B but also to other workers A. Therefore, it is effective to urge attention to the worker A who uses the safety belt less frequently. Can do.

  In this case, since the total time during which the safety belt 1 has been used is displayed, the usage status of the safety belt can be grasped not only by the number of uses but also by the usage time, which is effective for alerting the operator A. .

  In addition, an entry / exit detection unit 60 that detects entry and exit of the worker A at the work site is provided. When the entry / exit detection unit 60 detects entry / exit of the worker A, the entry / exit detection unit 60 controls the administrator. Since the fall detection signal is transmitted to the side terminal 20 and the entrance detection display 22i is displayed on the display unit 22 of the manager side terminal 20, the manager side terminal 20 allows the operator A to enter and leave. It can be managed easily. This makes it possible to efficiently perform personnel confirmation work at the start and end of work, and to quickly search for workers who do not return even after the work start end due to an unexpected accident, for example. It is also effective for safety management.

  In the second embodiment, the effects unique to the second embodiment have been described. However, in the second embodiment, the effects of the first embodiment can also be achieved.

  DESCRIPTION OF SYMBOLS 1 ... Safety belt, 3 ... Rope, 5 ... Rope winder, 10 ... Worker side terminal, 11 ... Transmitter, 12 ... Rope extraction sensor, 14 ... Temperature sensor, 15 ... Audio | voice output part, 16 ... 1st Control unit, 17 ... fall sensor, 20 ... administrator side terminal, 21 ... receiver, 22 ... display unit, 22b ... use state display, 22c ... use count display, 22d ... battery remaining amount display, 22e ... radio wave intensity Display, 22f ... Emergency notification display, 22g ... Temperature alarm display, 22h ... Usage time display, 22i ... Entrance detection display, 22j ... Fall detection display, 23 ... Buzzer, 40 ... Screen display, 60 ... Entrance / exit detection unit.

Further, the size of the outer diameter D of the rope 3 wound around the rope winder 5 is detected by a rope pull-out sensor 12 comprising a non-contact distance sensor, and the rope 3 is pulled out from the rope winder 5. Accordingly, when it is detected that the outer diameter D of the rope 3 is less than or equal to the predetermined outer diameter D1, a use detection signal is transmitted from the operator terminal 10, so that the processing and structure of the rope winder 5 can be improved. The use of the safety belt 1 can be detected without changing, and the use detection means of the safety belt 1 can be easily added to the existing rope winder 5. In addition, in the case where a barcode label attached to a predetermined position of a rope is read by a barcode reader as in the conventional example, the barcode label is likely to be damaged during work in the field. Since the rope pull-out sensor 12 detects the size of the outer diameter D of 3, the object to be detected such as a bar code label does not need to be attached to the rope, and the rope can be pulled out due to damage to the object to be detected. There is an advantage that it does not become undetectable.

Claims (13)

In the field worker management system for managing workers who use safety belts at the work site,
Operation detecting means for detecting the use of the safety belt by performing a predetermined operation on the safety belt;
When it is detected by the operation detection means that the operation has been performed, an operation detection signal transmission means for wirelessly transmitting an operation detection signal to the administrator side terminal,
An operation detection signal receiving means for receiving the operation detection signal transmitted by the operation detection signal transmitting means at the administrator side terminal; and
Usage status information display means for displaying predetermined safety band usage status information on the administrator side terminal based on the operation detection signal received by the operation detection signal receiving means;
An emergency call switch that is provided on the safety belt side and can be operated arbitrarily by the operator;
When the emergency call switch is operated, an emergency call signal transmitting means for outputting an emergency call signal to the administrator side terminal by radio,
An emergency call signal receiving means for receiving the emergency call signal transmitted by the emergency call signal transmitting means at the administrator side terminal; and
An on-site worker management system comprising: emergency call information output means for outputting predetermined emergency call information from an administrator side terminal based on the emergency call signal received by the emergency call signal receiving means. The safety belt includes a rope having a hook attached to the tip, and a rope winder that winds the rope.
The operation detecting means detects the size of the outer diameter of the rope wound around the rope winder by a non-contact type sensor, and the rope is pulled out from the rope winder so that the outer diameter of the rope is a predetermined value. The on-site worker management system according to claim 2, wherein the predetermined operation is detected as being less than or equal to an outer diameter. The usage status information display means is configured to display either one of a display indicating a state where the safety belt is used and a display indicating a state where the safety belt is not used. The field worker management system according to 1 or 2. The field worker management system according to any one of claims 1 to 3, wherein the usage status information display means is configured to display the number of times the safety belt is used. The field worker management system according to any one of claims 1 to 4, wherein the usage status information display means is configured to display a total time during which the safety belt has been used. A temperature sensor for detecting a temperature around the safety zone;
An on-site worker according to any one of claims 1 to 5, further comprising alarm means for outputting a predetermined alarm to an operator when the temperature detected by the temperature sensor becomes equal to or higher than a predetermined temperature. Management system. The field worker management system according to claim 6, wherein the alarm unit is configured to output a voice message for preventing a high temperature failure at a work site under a high temperature as the alarm. When the detected temperature of the temperature sensor is equal to or higher than a predetermined temperature, a temperature alarm signal transmitting means for transmitting a predetermined temperature alarm signal to the administrator side terminal by radio,
A temperature warning signal receiving means for receiving the temperature warning signal transmitted by the temperature warning signal output means at the administrator side terminal; and
The site according to claim 6 or 7, further comprising temperature alarm information display means for displaying predetermined temperature alarm information on the administrator side terminal based on the temperature alarm signal received by the temperature alarm signal receiving means. Worker management system. A fall detection means for detecting the fall of the worker wearing the safety belt;
When a fall of the worker is detected by the fall detection means, a fall detection signal transmission means for outputting a fall detection signal to the administrator side terminal by radio,
A fall detection signal receiving means for receiving the fall detection signal transmitted by the fall detection signal transmitting means at the administrator side terminal;
9. A fall detection information output means for outputting predetermined fall detection information from the administrator side terminal based on the fall detection signal received by the fall detection signal receiving means. Field worker management system according to one item. The fall detection means comprises an acceleration sensor for detecting acceleration, an angular velocity sensor for detecting angular velocity, and an angular velocity storage means for storing the angular velocity value detected by the angular velocity sensor, and the acceleration detected by the acceleration sensor. When the absolute value is smaller than the predetermined value and the absolute value of the angular velocity detected by the angular velocity sensor is larger than the predetermined value, the angular velocity value stored in the angular velocity storage means is determined from the latest detection time. Integration was performed up to the time of detection a predetermined range before, and when the absolute value of the integrated value was larger than the predetermined value and the angular velocity tended to increase, it was configured to detect the fall of the user in the safety zone The field worker management system according to claim 9 characterized by things. 11. The display device according to claim 1, further comprising: a screen indicator that is installed at a predetermined position on the work site and displays the safety band use status information on a screen that can be visually observed by personnel at the work site. Field worker management system. An entrance / exit detection means that is installed at a predetermined position on the work site and detects entry and exit of the worker at the work site;
When the entry / exit detection means detects entry or exit of the worker, an entry / exit detection signal transmitting means for wirelessly outputting an entry / exit detection signal to the administrator terminal,
Entrance / exit detection signal receiving means for receiving the entrance / exit detection signal transmitted by the entrance / exit detection signal transmitting means at the terminal on the administrator side,
2. An entrance / exit information output means for outputting predetermined entrance / exit information from the administrator side terminal based on the entrance detection signal or the exit detection signal received by the entrance / exit detection signal receiving means. The field worker management system according to any one of claims 11 to 11. The operation detecting means is configured to operate the rope winder so that the outer diameter of the rope wound around the rope winder becomes equal to or less than a predetermined outer diameter by pulling out the rope from the rope winder. It is comprised so that it may detect as. The site worker management system as described in any one of Claims 1 thru | or 12 characterized by the above-mentioned.

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