Operation monitoring system

Abstract

To provide an operation monitoring system capable of effectively monitoring not only deviation of an operation allowable area but also approaching a charging part in an electric line operation; and to enable an electric line that becomes an operation object to be identified without mis-recognizing.SOLUTION: A GPS built-in body sensor 4 is attached to each region of an operator 3, and an operator terminal 5 interconnecting with the body sensor 4 is attached to the operator 3. An operation target channel and an operation allowable area are stored in the operator terminal 5, and when the body sensor 4 deviates from the operation allowable area, an alarm is issued while displaying a region (deviated region) to which the body sensor 4 from which the operation allowable area is deviated is attached. Further, when the body sensor 4 approaches a charging part closer than a predetermined distance, the alarm is issued while displaying another region (approach region) to which the body sensor 4 that approaches the charging part is attached. Comparison is made possible with the operation target channel by providing a code label for displaying a code to which a channel name is recorded to read the code label with the operator terminal.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a work monitoring system that is effective when work is performed on electric power lines on the steel structure of a substation or the like. [Background technology]

[0002] Steel structures (outdoor steel structures) that support the main busbars, transmission lines, and branch lines to transformers in power plants and substations and switchyards contain a complex mixture of power outage and live parts, so when performing power outage work on the steel structures, it is necessary to avoid approaching the live parts. Therefore, in the past, when performing power outage work on power lines on steel structures, the operation information received from the control center and the status of the on-site switches were visually confirmed, and the power lines that were out of service were determined by the "busbar / line direction sign board" attached to the steel structure.

[0003] The example shown in Figure 8(a) shows an example of a steel structure in which two circuits, A-line 1L and A-line 2L, are installed in parallel, and A busbar and B busbar are installed in parallel, perpendicular to these. For each support pillar of the steel structure, as shown in Figure 8(b), if the directions of the support pillar viewed from the front and back in the direction of the extension of the circuit (A-line) are a and c, and the directions of the support pillar viewed from the front and back in the direction of the extension of the busbar are b and d, then at the locations of (1) to (3) of the steel structure, when the support pillar is viewed from directions a, b, c, and d, the appearance of the busbar / circuit direction sign board will be as shown in Figure 8(c).

[0004] For example, when performing power outage work on an electric line, if the electric line being worked on is, say, the A bus line and A line 2L section, if the worker is near (1), the right side as viewed from side a is A line 2L, and the right side as viewed from side d is the A bus line, so the area in the upper right corner of Figure 8(a) can be identified as the A bus line and A line 2L area. Based on the information received from the control center, we carefully identified the work location using the "busbar / line direction sign board" installed on-site. Summary of the Invention [Problem to be solved by the invention]

[0005] However, work on power lines is not limited to power outage work; there are also cases where work is performed near live lines on live circuits, or where work is performed without the risk of coming within close proximity to live lines. The safe clearance distance (allowable work area) required for each type of work is different. Therefore, while it is necessary to maintain an appropriate clearance distance depending on the type of work (power outage work, work near live lines, or work not near live lines), it is not always easy for workers to manage this themselves. While this can be addressed by supervisors, there are concerns about the possibility of supervisors making errors in judgment, so more reliable safety measures are desirable.

[0006] Furthermore, in the past, work targets were identified manually based on information received from the control center and relying on "busbar and line direction sign boards" installed on-site, so misidentifying the sign board could lead to serious accidents such as electric shock. In particular, since the information displayed on the sign board changes depending on the viewing direction, human error is likely to occur.

[0007] The present invention has been made in view of the above circumstances, and has as its main object to provide a work monitoring system that can effectively monitor deviations from the work allowance area and approaches to live parts during work on electric power lines. Another object is to easily identify the electric power line to be worked on without misidentifying it. [Means for solving the problem]

[0008] In order to achieve the above object, the work monitoring system according to the present invention comprises: GPS-equipped body sensors attached to each part of the worker's body, a worker terminal worn by the worker, which cooperates with the body sensor; The worker terminal includes: a work-related information storage means for storing the set work target lines and work allowable areas; a deviation warning issuing means for, when the body sensor deviates from the work allowable area, displaying a location (deviation location) where the body sensor is attached and issuing a warning; a proximity alarm issuing means for displaying a location (approaching location) where the body sensor is attached and issuing an alarm when the body sensor approaches the charging unit within a predetermined distance; The present invention is characterized by the following:

[0009] Therefore, the worker only needs to work within the set work allowable area for the set work target line, but if for some reason the body sensor deviates from the work allowable area during work, the deviation alarm issuing means displays the deviation area on the worker terminal and issues an alarm. Also, if for some reason the body sensor gets closer to the charging unit than a predetermined distance during work, the proximity alarm issuing means displays the approaching area on the worker terminal and issues an alarm. This ensures the worker's safe work.

[0010] Here, it is desirable that the body sensors be installed at least on the head, arms, and legs. Although work safety can be improved even if only one of the head, arms, and legs is installed, to ensure safe work, it is preferable to install sensors on each part of the body to cover all possible movements. For this reason, the body sensors are not limited to the above three locations, and may also be installed on the back, waist, etc.

[0011] In addition, in order to identify the circuit to be worked on, a code sign may be provided that is installed on the steel structure supporting the circuit to be worked on and displays a code in which the circuit name is recorded, and the worker terminal may further be provided with a verification means that reads the code sign and verifies it with the circuit to be worked on stored in the work-related information storage means. By employing such a verification means, it is possible to prevent accidents caused by workers misidentifying the sign board.

[0012] Furthermore, a monitoring terminal capable of communicating with the worker terminal may be provided, and the target line and permitted work area may be set on the monitoring terminal, with the same information displayed on the worker terminal. With this configuration, the monitor can share the same work status as the worker, and can also give instructions from the monitor if the worker deviates from the permitted work area or approaches a charging unit, ensuring safe work. In addition, to ensure the worker's safe work, the worker terminal may be configured to issue an additional alarm if it determines that the worker is climbing the tower before receiving instructions to do so from the monitoring terminal. [Effects of the Invention]

[0013] As described above, according to the present invention, body sensors with built-in GPS are provided in each part of the worker's body, and the worker wears a worker terminal that works in conjunction with the body sensor.If the body sensor deviates from the set allowable work area, the worker terminal displays the deviation area and issues an alarm.Furthermore, if the body sensor comes closer to the charging unit than a predetermined distance, the worker terminal displays the approaching area and issues an alarm.This makes it possible to work safely even on steel structures where there is a complex mixture of power outage areas and charging areas. In addition, to identify the line to be worked on, the worker can use a terminal to read code signs that are installed on steel structures and display a code that records the line name, and then match the line to be worked on. This will also prevent accidents caused by workers misidentifying signboards. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a diagram showing an example of the overall configuration of a work monitoring system according to the present invention; [Figure 2] 1 is a diagram showing the attachment state of a human body sensor attached to a worker and a worker terminal worn by the worker, which are used in the work monitoring system according to the present invention; [Figure 3] FIG. 2 illustrates an example of a worker terminal. [Figure 4] FIG. 10 is a diagram for explaining a safe separation distance according to work to be performed on a line (charging unit) that is being charged. [Figure 5] 3 is a flowchart showing an example of a work operation of the work monitoring system according to the present invention. [Figure 6] 6 is a flowchart showing an example of a work operation of the work monitoring system according to the present invention, which is a continuation of FIG. 5. [Figure 7] 7 is a flowchart showing an example of a work operation of the work monitoring system according to the present invention, which is a continuation of FIG. 6. [Figure 8] FIG. 10 is a diagram illustrating a conventional method for identifying a line to be worked on in a steel structure. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Figure 1 shows an overview of a work monitoring system 1 according to the present invention. This work monitoring system 1 is used, for example, to monitor work on an outdoor steel structure 2 that has a complex mixture of powered and live areas, and is configured with a body sensor 4 attached to a worker 3, a worker terminal 5 carried by the worker 3, and monitoring terminals 8 and 9 carried by supervisors 6 and 7, as shown in Figure 2. In particular, in this example, the supervisors 6 and 7 include a site agent 6 who directly monitors the site, and a supervisor 7 who monitors from a monitoring station 10 located away from the site, such as a substation building, and the worker terminal 5 carried by the worker 3, the monitoring terminal 8 carried by the site agent 6, and the monitoring terminal 9 carried by the supervisor 7 are capable of communicating with each other.

[0016] The body sensors 4 attached to the worker 3 are worn before work begins. They are sensors equipped with a built-in GPS chip that receives radio waves transmitted from GPS satellites 12 to identify location information, and are composed of sensors attached to the head, arms, legs, etc. (head sensor 4a, arm sensor 4b, leg sensor 4c). For example, the head sensor 4a is attached to the inner cap of a helmet. The arm sensor 4b is preferably configured as a bracelet, and the leg sensor 4c is preferably configured as an anklet. While it is possible to provide any one of these body sensors 4, it is preferable to provide them on all of the head, arms, and legs to ensure the separation between each part of the body and the charging part. Furthermore, if necessary, sensors may also be provided on the back, waist, etc.

[0017] As shown in FIG. 3, the worker terminal 5 carried by the worker 3 is, for example, a wristwatch type terminal that has a built-in GPS chip 5a and a communication unit 5b, and various controls such as communication control by a control unit 5c and display control by a display unit 5d are performed by the control unit 5c, and the terminal can be connected to an external electric wire coordinate system 310 and a control system 320 via a communication network 300 such as the Internet (see FIG. 1).

[0018] The electric wire coordinate system 310 stores electric wire position data (X, Y, Z), the name of the electric line, and the circuit name, and is used to identify the electric wire to be worked on, etc. The control system 320 stores information such as the on / off status of circuit breakers, line switches, and grounding devices, charge / discharge information for the electric line, and the presence or absence of grounding measures, and is used in conjunction with the electric wire coordinate system 310 to check the status of each electric line, etc.

[0019] The operator terminal 5 can automatically display the acquired electric line information and electric line charge / cutoff information on the display unit 5d by linking the electric line coordinate system 310 and the control system 320. In addition, the worker terminal 5 is linked to the body sensor 4 worn by the worker 3, and when the worker deviates from the set work area or comes closer than a predetermined distance to the charging unit, the worker terminal 5 displays the body part that has deviated or approached on the display unit 5d, and also has the function of notifying the worker by means of an audio alarm, vibration, etc. Furthermore, the worker terminal 5 also includes a camera 5e capable of reading a QR code (registered trademark) 11 attached to the steel structure 2 and recording the line name and other information, and a speaker 5f for issuing alarms, messages, and the like.

[0020] On the other hand, the monitoring terminals 8 and 9 are used for monitoring the worker 3, and are composed of smartphones or tablet terminals, and like the worker terminal 5, have built-in GPS chips and communication units, and various controls such as communication control and display control of the display unit are performed by the control unit, and are connectable to the electric wire coordinate system 310 and the control system 320 via the communication network 300. The monitoring terminals 8 and 9 are also capable of displaying the contents of the worker terminal 5 (such as display of areas where the worker has deviated from the work area and areas where the worker has approached a charging unit, as will be described later). The monitoring terminal 8 also has the function of setting the target line on which the worker 3 will work, setting the work area, and directly transmitting instructions and messages to the worker 3.

[0021] Here, the setting of the work area is set as follows in relation to the charging unit, as shown in FIG. First, when performing work that may put a worker's body within the "safe approach distance" of a live part, the work should be carried out with the power cut off. Next, when performing work that may put the worker's body within the range from the "safe approach distance" to the "live line proximity clearance distance" with respect to the live part, the worker should work at a distance greater than the "safe approach distance" as if it were live line proximity work (with "live line proximity work setting"). In practice, the safe clearance distance is the "safe approach distance" plus a margin, and the work area is set outside of that. Furthermore, when performing work that does not involve the risk of the worker's body coming within the "live line proximity and clearance distance" of a live part, the worker should work further away than the "live line proximity and clearance distance." In practice, the safe clearance distance is set to a distance that includes a margin, and the work area is set outside of that.

[0022] Therefore, for example, if A-line 1L in Figure 1 is the target for power outage work and A-line 2L is the target for work in close proximity to a live line, A-line 1L may be within the safe approach distance if the target for power outage work is in a power outage state, but A-line 2L must be worked at a distance greater than the safe approach distance plus a margin. Also, for example, if A-line 1L is the subject of power outage work and A-line 2L is not the subject of live line proximity work, A-line 1L may enter within the safe approach distance if the subject of power outage work is in a power outage state, but A-line 2L must be worked at a distance greater than the live line proximity clearance distance plus a margin.

[0023] Therefore, the safe distance to approach differs depending on whether the live line is being worked on or not, and a greater distance is required when the live line is not being worked on compared to when the live line is being worked on. The distance and safe approach distance also differ depending on the voltage. As such, the safe clearance distance during work varies depending on the work location and work content, so relying solely on the worker's judgment may not guarantee safety.

[0024] Therefore, in the present invention, the worker performs work while performing necessary monitoring using the above-mentioned body sensor 4 and terminal. Below, the case where a worker performs work on the steel structure 2 will be described based on the flowcharts shown in Figures 5 to 7.

[0025] First, the worker 3 activates the GPS of each body sensor 4 (head sensor 4a, arm sensor 4b, leg sensor 4c) attached to the head, leg, and arm (step 52), and links each body sensor 4 to the worker terminal 5 (wristwatch-type charge / power outage indicator) owned by the worker 3 (step 54). In other words, preparations are made so that the worker terminal 5 can issue an alarm (activate a screen display alarm, audio alarm, or vibration alarm) if each body sensor 4 deviates from a pre-set work area based on its own position information or approaches within a predetermined distance of the charging unit.

[0026] Once this preparation is complete (step 56), the worker terminal 5 will be able to send and receive data to and from the monitoring terminal 8 carried by the site agent 6 monitoring the site, and the monitoring terminal 9 carried by the monitor 7 monitoring at the monitoring station 10.

[0027] The on-site agent 6 waits until the preparation of the worker terminal 5 is complete, and then operates his / her own monitoring terminal 8 to set the work target for the worker (step 102). Based on the setting information, the monitoring terminal 8 then connects to the electric wire coordinate system 310 and the control system 320 via the communication network 300, acquires information on the electric line to be worked on and information on the charge / cutoff of the electric line, and automatically displays this information on the display unit (step 104). The on-site agent 6 also operates the monitoring terminal 8 to set a work area (step 106). The work area set here is the work area set according to the content of the work described in FIG. 4 above.

[0028] Then, the site agent 6 transmits the set target work line and work area to the worker 3 (worker terminal 5) and the monitor 7 (monitoring terminal 9) (step 108).

[0029] In response to this, the worker 3 receives the setting information for the line to be worked on and the work area on the worker terminal 5 (step 58), and the line to be worked on and its status (charging / power outage status) are displayed on the worker terminal 5 (step 60). At this time, the information on the electric line to be worked on and the information on charging / power outage of the electric line may be displayed as is as sent from the monitoring terminal 8, or the worker terminal 5 may connect to the electric line coordinate system 310 and the control system 320 via the communication network 300 based on the work target information sent from the monitoring terminal 8, obtain the information on the electric line to be worked on and the information on charging / power outage of the electric line, and display this on the display unit 5d of the worker terminal 5.

[0030] Thereafter, in order to confirm (verify) the work target at the site, the worker 3 uses the camera 5e of the worker terminal 5 to read the QR code 11 attached to the support pillar of the steel structure 2 supporting the line to be worked on, and verifies the work target (step 62). If the result of the matching is that the work target matches the target for which work is planned (matching is successful), a message that matching is complete is displayed on the worker terminal 5 and sent to the monitoring terminal 8 of the on-site agent 6 (steps 64, 66). On the other hand, if the result of matching the work target is not successful, the on-site line to be worked on is checked again, and the QR code 11 attached to the support of the steel structure 2 that supports the line to be worked on is read again to check again whether the matching is successful (steps 64, 62). This process is then repeated until matching is successful, and the on-site agent 6 receives a notification that matching of the work target has been completed (notification that matching is successful), making it possible to give instructions to start work (step 110).

[0031] The on-site agent 6 also transmits the setting information for the line to be worked on and the work area to the terminal of the supervisor 7 (the monitoring terminal 9 carried by the supervisor 7) (step 108), and when the supervisor 7 receives this information on the monitoring terminal 9 (step 202), the line to be worked on and its status (charging / power outage status) are displayed on the monitoring terminal 9 (step 204). Here too, the information on the electric line to be worked on and the information on charging / power outage of the electric line may be displayed as is as sent from the monitoring terminal 8, or the monitoring terminal 9 may connect to the electric line coordinate system 310 and the control system 320 via the communication network 300 based on the work target information sent from the monitoring terminal 9, obtain the information on the electric line to be worked on and the information on charging / power outage of the electric line, and display this on the display unit.

[0032] Furthermore, the state of the worker terminal 5 of the worker 3 (display contents of the worker terminal 5) is displayed on the monitoring terminal 9, and constant monitoring is performed (step 206). When the site agent 6 receives a notification that the worker 3 has completed the verification of the QR code 11 on-site and that the verification of the work object has been completed (step 110), the site agent 6 transmits permission to climb the tower (step 112), as shown in Fig. 6. When the worker terminal 5 receives the notification of permission to climb the tower (step 68), the display unit 5d of the worker terminal 5 displays "Climbing permitted" (step 70), and the worker 3 then begins climbing the tower.

[0033] When worker 3 starts climbing the tower and leaves the ground, worker terminal 5 starts monitoring deviations from the work area based on information from body sensor 4 until worker 3 descends to the ground (steps 72, 74), and monitors whether or not worker 3 has deviated from the work area (monitors whether or not worker 3 has deviated from the work area and entered the live area) (step 76).

[0034] In this case, if the climb is made even though an instruction for permission to climb has not been received (if the climb is made without permission), this is an unauthorized climb, so an alarm is issued to the worker terminal 5 (steps 78, 80), and a message to that effect is also sent to the monitoring terminal 8 (step 114).

[0035] Incidentally, the worker 3 who has received permission to ascend the tower is monitored for deviation from the work area using the body sensor 4. That is, each body sensor 4 compares its own acquired position information with the work area set by the site agent 6 (monitoring terminal 8), and if it is determined that the body sensor 4 has deviated from the set work area (step 76), safety cannot be guaranteed, so the part where the body sensor 4 that has deviated from the work area is attached (deviation part) is displayed on the display unit 5d of the worker terminal 5, and an alarm is issued (step 81).Furthermore, in order to share this status with the site agent 6 and the monitor 7, the deviation part is similarly displayed on the monitoring terminals 8 and 9, and an alarm is issued (steps 120, 220). In response to this, if the site agent 6 or the supervisor 7 requests that the work be stopped, the site agent 6 or the supervisor 7 sends an instruction to stop the work from the supervisor terminal 8 or 9 to the worker terminal 5 (steps 122 and 222).

[0036] When departing from the work area, the risk of electric shock is relatively smaller than when coming into contact with a live part, so there may be cases where it is not necessary to stop work depending on the part of the departure and the situation. Therefore, the worker terminal 5 determines whether a request to stop work has been sent from the monitoring terminals 8 and 9 (step 82), and if there is no request to stop work, continues to monitor the approach of the live part and continues work (steps 83 to 84).

[0037] On the other hand, if a request to stop work is made, it is necessary to quickly finish the work and allow worker 3 to descend, so worker 3 begins descending upon receiving the request to stop work. The work monitoring system 1 continues to monitor worker 3's approach to the live part while he descends until he reaches the ground (steps 87, 88, 89). Then, upon reaching the ground, the worker transmits a work completion notification to end the series of tasks (step 92). After the site agent receives this work completion notification (step 131), he confirms it and transmits a work completion acknowledgement to the worker and the supervisor (step 132). The worker ends the work upon receiving the work completion acknowledgement (step 93). The supervisor also ends the work upon receiving the work completion acknowledgement (step 231).

[0038] On the other hand, if the body sensor 4 comes within a predetermined distance of the charging unit during work (steps 84, 88), the part where the body sensor 4 that has come close to the charging unit is attached (the approaching part) is displayed on the display unit 5d of the worker terminal 5, and an alarm is issued, in order to avoid electric shock (step 85).Furthermore, in order to share this status with the site agent 6 and the monitor 7, the approaching part is similarly displayed on the monitoring terminals 8, 9, and an alarm is issued (steps 124, 224).

[0039] In this case, since there is a high urgency in ensuring the safety of the workers, the supervisor 7 sends a notice to stop work to the site agent 6 (supervisory terminal 8) and the worker 3 (worker terminal) via the monitoring terminal 9 (steps 126, 226). In response to this, an instruction to stop work is displayed on the worker terminal 5 together with an alarm (step 86).

[0040] When worker 3 receives the work stop warning on worker terminal 5, he / she is unable to continue working, so he / she quickly finishes his / her work and begins descending the tower. Work monitoring system 1 continues to monitor worker 3's approach to the charging unit while he / she is descending the tower until he / she reaches the ground (steps 87, 88, 89). Then, when he / she reaches the ground, the worker sends a work completion notification to end the series of work (step 92). After the site agent receives this work completion notification (step 131), he / she confirms it and sends a work completion acknowledgement to the worker and the supervisor (step 132). The worker finishes his / her work by receiving the work completion acknowledgement (step 93). The supervisor also finishes his / her work by receiving the work completion acknowledgement (step 231).

[0041] When descending after completing a series of tasks or when interrupting work midway to descend, worker 3 transmits permission to descend from worker terminal 5 to monitoring terminal 8 of site agent 6 (step 94). In response, site agent 6 receives the permission to descend (step 116), and if there are no particular problems, transmits an instruction to permit descending (step 118).

[0042] When the worker 3 receives the instruction for permission to descend via the worker terminal 5 (step 95), the display unit 5d of the worker terminal 5 displays "descend permitted" (step 96), and monitoring of deviations from the work area and approach to the charging unit is continued until the worker descends to the ground. When the worker 3 reaches the ground, the worker determines that the series of tasks has ended (step 91). If the series of tasks has ended, a notification of the end of work is transmitted (step 92). After receiving the notification of the end of work, the site agent transmits a notification of acknowledgement of the end of work to the worker and the supervisor (steps 131, 132). The worker ends the work by receiving the acknowledgement of the end of work (step 92). The supervisor also ends the work by receiving the acknowledgement of the end of work (step 231).

[0043] As described above, the body sensor 4 attached to the body of the worker 3 is used to constantly monitor whether or not the worker has deviated from the work area or approached the charging unit. If the worker deviates from the work area or approaches the charging unit within a specified distance, the worker's terminal will display the deviation or approach area and issue a warning, allowing the worker to quickly stop the current work to avoid danger and take action to avoid an accident by seeking instructions from the monitor.

[0044] Furthermore, when identifying the line to be worked on before starting work, the line to be worked on can be identified by reading the QR code 11 on which the line name is recorded, without relying on the "busbar / line direction sign board" at the site, which eliminates worker misidentification and also makes it possible to avoid electric shock accidents.

[0045] In the above configuration, work on a steel structure supporting a large number of electric lines has been described, but a similar system can be used for work in locations where there are multiple live parts. [Explanation of symbols]

[0046] 1. Work monitoring system 2 Steel Structure 3. Workers 4 Body Sensors 4a Head sensor 4b Arm sensor 4c Leg sensor 5. Worker terminal 6 Field agent 7 Warden 8,9 Monitoring terminal 11 QR Code

Claims

1. GPS-equipped body sensors attached to each part of the worker's body; a worker terminal worn by the worker, which cooperates with the body sensor; The worker terminal includes: a work-related information storage means for storing the set work target lines and work allowable areas; a deviation warning issuing means for, when the body sensor deviates from the work allowable area, displaying a location where the body sensor is attached and issuing a warning; a proximity alarm issuing means for, when the body sensor approaches the charging unit within a predetermined distance, displaying the location where the body sensor is attached and issuing an alarm; A work monitoring system comprising:

2. a code sign installed on the steel structure supporting the line to be worked on and displaying a code in which the line name is recorded; 2. The work monitoring system according to claim 1, wherein the worker terminal further comprises a comparison means for reading the code indicator and comparing it with the work target line stored in the work-related information storage means.

3. 3. The work monitoring system according to claim 1, wherein the body parts to which the body sensors are attached are at least the head, arms, and legs.

4. 3. The work monitoring system according to claim 1, further comprising a monitoring terminal capable of communicating with the worker terminal, wherein the work target line and work allowable area are set by the monitoring terminal, and the same content as that on the worker terminal can be displayed on the monitoring terminal.

5. The work monitoring system according to claim 4, characterized in that the worker terminal issues an alarm if it determines that the worker is climbing the tower before receiving a climbing instruction from the monitoring terminal.

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