JP2021067520A - Water leakage monitoring system and water leakage monitoring method - Google Patents

Abstract

To enable the leakage of a water leakage monitoring object to be efficiently monitored by wireless communication together with other inspection monitoring items, and further enable the number of installed repeaters of wireless communication to be reduced.SOLUTION: The present invention comprises: a water leakage sensor 11 of self-power generation type for generating electric power in the presence of water leakage and detecting the water leakage of a water leakage detection object, and transmitting a water leakage signal by first wireless communication A1; a portable information terminal 13 carried by a mobile entity that inspects various inspection monitoring items by patrolling; and a monitoring PC 15 for monitoring the water leakage state of the water leakage inspection object. The portable information terminal 13 includes a water leakage signal receive unit 18 for receiving a water leakage signal from the water leakage sensor, a water leakage quantity calculation unit 20 for calculating the water leakage quantity of the water leakage inspection object on the basis of the received water leakage signal, and a water leakage information transmit/receive unit 22 for transmitting water leakage information that includes the water leakage quantity. The monitoring PC 15 receives water leakage information from the water leakage information transmit/receive unit via a repeater 24 by second wireless communication A2 and monitors the water leakage state of the water leakage inspection object.SELECTED DRAWING: Figure 1

Description

An embodiment of the present invention relates to a leak monitoring system and a leak monitoring method for monitoring leaks of a leak inspection object.

In the periodic inspection of nuclear power plants, water leakage is checked in the flanges of pipes and the grounds of valves in the pressure resistance test after overhauling various equipment and facilities. However, since the number of check points is large and the water leakage is colorless and transparent, it is difficult to distinguish them. Therefore, a technique capable of efficiently checking these is required. A small amount of water leakage is not so problematic in a general plant, but in the case of a nuclear power plant, it becomes a very big problem when water containing radioactive substances leaks.

On the other hand, many general leak detection devices are battery-powered or require a power outlet. These have practical problems because it takes time to replace the battery and it is necessary to prepare a power supply. A leak detection system that does not require a battery or a power outlet has been proposed to solve these problems.

For example, it is a system in which a self-powered water leakage sensor is attached to each place where water leakage is desired to be detected in an underpass such as a tunnel, and when there is a water leakage, the power generated by this water leakage is displayed on the display. .. In some cases, when a water leak is detected, the information is wirelessly transmitted by a wireless transmitter.

Japanese Unexamined Patent Publication No. 2013-167550 JP-A-2018-173387

When the above-mentioned conventional leak detection system is applied to a nuclear plant facility and a leak detection sensor without communication means is installed in each part where a leak check needs to be performed, the room is divided for each device such as a pump. Therefore, the worker must inspect at the site to confirm the leak, and the leak cannot be detected efficiently. Further, in the case of a plant, it is necessary to perform various patrol inspections such as abnormal noise, odor, and vibration of equipment as well as water leakage, and simply installing a water leakage detection sensor is not effective in labor saving for inspection and monitoring.

The embodiment of the present invention has been made in consideration of the above circumstances, and can efficiently monitor the leak of the leak inspection object by wireless communication, can monitor it together with other inspection and monitoring items, and further wirelessly. It is an object of the present invention to provide a leak monitoring system and a leak monitoring method capable of reducing the number of communication repeaters installed.

The water leakage monitoring system according to the embodiment of the present invention includes a self-powered water leakage sensor that generates power in the presence of water leakage, detects water leakage of a water leakage inspection object, and transmits a water leakage signal by the first wireless communication, and various inspections. The portable information terminal has a portable information terminal carried by a moving body that patrols and inspects monitoring items, and a monitoring means for monitoring the leak status of the leak inspection object, and the portable information terminal has the leak signal from the leak sensor. A water leakage signal receiving unit that receives the above, a water leakage amount calculation unit that calculates the water leakage amount of the water leakage inspection object based on the water leakage signal received by the water leakage signal receiving unit, the water leakage amount, and the portable information terminal. The monitoring means includes a leak information transmission / reception unit for transmitting water leakage information including the position information of the above, and the monitoring means receives the water leakage information from the water leakage information transmission / reception unit by a second wireless communication via a repeater, and the above-mentioned It is characterized by being configured to monitor the leak status of the leak inspection object.

In the leak monitoring method according to the embodiment of the present invention, a self-powered leak sensor that generates power in the presence of leak, detects the leak of the leak inspection object, and transmits the leak signal by the first wireless communication is prepared, and various types are prepared. Using a portable information terminal carried by a mobile body that patrols and inspects the inspection and monitoring items, the amount of water leakage is calculated based on the water leakage signal received from the water leakage sensor by the first wireless communication, and the water leakage amount and the mobile phone are used. It is characterized in that leak information including the position information of the type information terminal is acquired by a second wireless communication and the leak status of the leak inspection object is monitored.

According to the embodiment of the present invention, the leak of the leak inspection object can be efficiently monitored by wireless communication, and can be monitored together with other inspection and monitoring items, and the number of wireless communication repeaters installed can be reduced. Can be done.

The block diagram which shows the leak | leakage monitoring system which concerns on 1st Embodiment. (A) is a block diagram showing the configuration of the leak monitoring system of FIG. 1, and (B) is an enlarged view showing the leak sensor of FIG. 2 (A). The graph which shows the relationship between the transmission interval period of the water leakage signal used by the water leakage amount calculation part of FIG. The flowchart which shows the leak | leakage monitoring procedure executed by the leak | leakage monitoring system of FIG. (A) is a block diagram showing the configuration of the leak monitoring system according to the second embodiment, and (B) is an enlarged view showing a glove equipped with the leak sensor of FIG. 5 (A).

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[A] First Embodiment (FIGS. 1 to 4)
FIG. 1 is a block diagram showing a leak monitoring system according to the first embodiment. 2 (A) is a configuration diagram showing the configuration of the leak monitoring system of FIG. 1, and FIG. 2 (B) is an enlarged view showing the leak sensor of FIG. 2 (A). The leak monitoring system 10 shown in FIGS. 1 and 2 detects and monitors the leak of the leak inspection object 1 such as plant equipment and piping, and includes a leak sensor 11, a portable information terminal 13, and an image pickup. It includes a camera 14 as a means and a monitoring PC 15 as a monitoring means.

The water leakage sensor 11 includes a pair of electrodes (not shown), and when the pair of electrodes come into contact with the water leakage generated in the water leakage inspection object 1, a potential difference is generated between the electrodes to generate electricity, and the water leakage of the water leakage inspection object 1 is generated. It is a self-powered water leakage sensor that detects, and further includes a wireless communication module 12. The wireless communication module 12 transmits a water leakage signal indicating water leakage detection by the water leakage sensor 11 by wireless communication (first wireless communication A1) at a timing when a predetermined amount of electric power generated by the water leakage sensor 11 is stored in a battery (not shown). Send. In the first embodiment, the water leakage sensor 11 is individually installed on the water leakage inspection object 1.

The portable information terminal 13 and the camera 14 are carried by a mobile body that patrols and inspects various inspection and monitoring items such as water leakage, abnormal noise, vibration, and offensive odor of the device. In the first embodiment, the moving body is, for example, an inspection worker 16 who patrols and inspects the inside of the plant, but may be a robot or a drone for patrol inspection. The camera 14 is set in advance so that, for example, an inspection worker 16 can take a picture in the line-of-sight direction, and is provided so as to be able to take a picture of a leaked portion in the leak inspection object 1.

The portable information terminal 13 includes a water leakage signal receiving unit 18, a water leakage notification unit 19, a water leakage amount calculation unit 20, a camera shooting instruction unit 21 as an imaging means operation instruction unit, and a water leakage information transmission / reception unit 22.

The water leakage signal receiving unit 18 receives the water leakage signal from the water leakage sensor 11 (wireless communication module 12), and transmits the water leakage signal to the water leakage notification unit 19, the water leakage amount calculation unit 20, and the camera shooting instruction unit 21. When the water leakage notification unit 19 receives the water leakage signal from the water leakage signal receiving unit 18, it notifies the inspection worker 16 during the patrol inspection by sound or vibration that the water leakage has been detected based on the water leakage signal. Upon receiving this notification, the inspection worker 16 approaches the leak inspection object 1 that has transmitted the leak signal and investigates the leak location in detail.

The water leakage amount calculation unit 20 calculates the water leakage amount of the water leakage inspection object 1 based on the water leakage signal from the water leakage sensor 11 received by the water leakage signal receiving unit 18. That is, the water leakage signal from the water leakage sensor 11 is transmitted by the wireless communication module 12 at the timing when the electric power generated by the water leakage of the water leakage inspection object 1 is stored in the battery (not shown). The transmission timing of this water leakage signal, that is, the transmission interval cycle, is based on the principle that as the amount of water leakage increases, the area where the water leakage sensor 11 gets wet with water increases and the amount of power generation increases, so that the water leakage signal interval from the water leakage sensor 11 becomes shorter. As shown in FIG. 3, as the amount of water leakage from the water leakage inspection object 1 increases from W _{1 to W Y} , it becomes shorter from t _{X to t 1.} From this, the water leakage amount calculation unit 20 calculates the water leakage amount of the water leakage inspection target 1 based on the transmission interval cycle of the water leakage signal from the water leakage sensor 11. As shown in FIG. 1, the water leakage amount calculation unit 20 transmits the calculated water leakage amount of the water leakage inspection target 1 to the water leakage information transmission / reception unit 22.

The camera shooting instruction unit 21 outputs a shooting command to the camera 14 based on the water leakage signal from the water leakage sensor 11 received by the water leakage signal receiving unit 18. The camera 14 photographs the leaked portion of the leak inspection object 1 in the direction of the line of sight of the inspection worker 16 based on the photographing command from the camera photographing instruction unit 21, and transmits the image to the leak information transmitting / receiving unit 22.

The water leakage information transmission / reception unit 22 acquires the indoor position information of the portable information terminal 13 transmitted from the indoor positioning beacon 23 by wireless communication B. The water leakage information transmission / reception unit 22 includes the position information of the portable information terminal 13, the water leakage amount of the water leakage inspection object 1 transmitted from the water leakage amount calculation unit 20, and the water leakage of the water leakage inspection object 1 transmitted from the camera 14. The image of the location is transmitted as water leakage information to the monitoring PC by wireless communication (second wireless communication A2) via the repeater 24.

The monitoring PC 15 receives and acquires the leak information from the leak information transmission / reception unit 22 of the portable information terminal 13 by the second wireless communication A2 via the repeater 24, and monitors the leak status of the leak inspection object 1. To do. The monitoring PC 15 further displays the acquired water leakage information on the display unit 25 and records it in the storage device 26.

The leak monitoring procedure of the leak inspection object 1 by the leak inspection system 10 configured as described above will be described with reference to FIG.
When a water leak occurs in the water leakage inspection object 1 and the self-power generation type water leakage sensor 11 detects this water leakage, the wireless communication module 12 attached to the water leakage sensor 11 transmits a water leakage signal by the first wireless communication A1. (S1). This water leakage signal is received by the water leakage signal receiving unit 18 of the portable information terminal 13 carried by the inspection worker 16 during the patrol inspection (S2).

Based on the water leakage signal received by the water leakage signal receiving unit 18, the water leakage amount calculation unit 20 of the portable information terminal 13 increases the area where the water leakage sensor 11 gets wet with water as the water leakage amount increases, and the power generation amount increases. As a result, the amount of water leakage from the water leakage inspection object 1 is calculated based on the principle that the interval between water leakage signals from the water leakage sensor 11 is shortened, and this amount of water leakage is transmitted to the water leakage information transmission / reception unit 22 of the portable information terminal 13 (S3). Further, the water leakage notification unit 19 of the portable information terminal 13 detects the water leakage of the water leakage inspection object 1 based on the water leakage signal received by the water leakage signal receiving unit 18, and checks the portable information terminal 13 to carry it. Notify the worker 16 (S4).

The camera shooting instruction unit 21 of the portable information terminal 13 outputs a shooting command to the camera 14 carried by the inspection worker 16 based on the water leakage signal received by the water leakage signal receiving unit 18, that is, instructs the camera 14 to shoot (S5). ). The camera 14 photographs the leaked portion of the leak inspection object 1 according to the photographing command from the camera photographing instruction unit 21, and transmits the photographed image to the leak information transmitting / receiving unit 22 of the portable information terminal 13 (S6).

The water leakage information transmission / reception unit 22 of the portable information terminal 13 receives and acquires the indoor position information of the portable information terminal 13 from the indoor positioning beacon 23 by wireless communication B (S7). Then, the water leakage information transmission / reception unit 22 includes the amount of water leakage of the water leakage inspection object 1 from the water leakage amount calculation unit 20, the image of the leakage point of the water leakage inspection object 1 from the camera 14, and the position information of the portable information terminal 13. Is transmitted as water leakage information to the monitoring PC 15 by the second wireless communication A2 via the repeater 24 (S8).

The monitoring PC 15 monitors the leak status of the leak inspection object 1 by receiving and acquiring the leak information from the leak information transmission / reception unit 22 of the portable information terminal 13, and further displays the acquired leak information on the display unit 25. Is displayed and recorded in the storage device 26 (S9).

Based on the above configuration, the leak inspection system 10 of the first embodiment has the following effects (1) to (5).
(1) As shown in FIGS. 1 and 2, a water leakage signal from the self-powered water leakage sensor 11 is transmitted to the portable information terminal 13 by the first wireless communication A1, and is calculated by the portable information terminal 13. The amount of water leaked from the leaked object 1 and the leaked information including the image of the leaked part of the leaked object 1 by the camera 14 and the position information of the portable information terminal 13 are transmitted by the second wireless communication A2 via the repeater 24. By transmitting to the monitoring PC 15, the leak status of the leak inspection object 1 can be efficiently monitored in a short time.

(2) By carrying the portable information terminal 13 with a moving body such as an inspection worker 16 who patrols and inspects various inspection and monitoring items, the leak status of the leak inspection object 1 can be checked by other inspection and monitoring items, for example. It can be monitored together with abnormal noise and vibration of equipment, and labor saving can be achieved for inspection and monitoring.

(3) Leakage of the leak inspection object 1 from the self-powered leak sensor 11 via the portable information terminal 13 and the repeater 24 by wireless communication (first wireless communication A1 and second wireless communication A2). Since the information (leakage information based on the leak signal) is transmitted to the monitoring PC 15, the leak-type information terminal 13 fulfills the function of the repeater 24, and the number of repeaters installed can be reduced.

(4) The camera 14 is carried by a moving body such as an inspection worker 16, and the camera 14 photographs the leaked portion of the leak inspection object 1 by a photographing command from the camera photographing instruction unit 21 of the portable information terminal 13. Therefore, the monitoring PC 15 can easily acquire an image of the leaked portion of the leak inspection object 1.

(5) The mobile body carrying the portable information terminal 13 and the camera 14 is an inspection worker 16 who performs a patrol inspection, and when a leak is detected in the leak inspection object 1, a leak notification of the portable information terminal 13 is given. Department 19 notifies the inspection worker 16 that a water leak has been detected. As a result, the inspection worker 16 can instantly notice the leak of the leak inspection object 1 and approach the leak location, investigate the leak status in detail, and notify the investigation content to, for example, the monitoring PC 15. ..

[B] Second embodiment (FIG. 5)
5A is a configuration diagram showing a configuration of a leak monitoring system according to a second embodiment, and FIG. 5B is an enlarged view showing a glove equipped with a leak sensor of FIG. 5A. In this second embodiment, the same parts as those in the first embodiment are designated by the same reference numerals as those in the first embodiment to simplify or omit the description.

The difference between the leak monitoring system 30 of the second embodiment and the first embodiment is that the leak sensor 11 is not installed individually on the leak inspection object 1, but is installed on a moving body (for example, an inspection worker 16). It is a point that was done. Specifically, the water leakage sensor 11 is installed on a glove 31 worn by the inspection worker 16, a pointer rod (not shown), or the like, and is carried by a moving body such as the inspection worker 16.

As described above, the water leakage sensor 11 for detecting the water leakage of the water leakage inspection object 1 is installed in a moving body (for example, inspection work 16) for patrol inspection. Therefore, when the moving body (for example, inspection work 16) approaches the leaking water leakage inspection object 1, the water leakage sensor 11 detects the water leakage of the water leakage inspection object 1 and detects the water leakage of the water leakage inspection object 1, and the moving body (for example, inspection worker) The water leakage signal is transmitted to the portable information terminal 13 carried by 16) by the first wireless communication A1. As a result, the portable information terminal 13 obtains the leak amount of the leak inspection object 1, the image of the leak location of the leak inspection object 1, and the position information of the portable information terminal 13 as the first embodiment. As a result, the information is transmitted to the monitoring PC 15 by the second wireless communication A2, and the monitoring PC 15 monitors the water leakage status of the water leakage inspection object 1, displays it on the display unit 25, and records it in the storage device 26.

Since it is configured as described above, according to the second embodiment, in addition to the same effects as the effects (1) to (5) of the first embodiment, the following effect (6) is obtained.

(6) Since the water leakage sensor 11 for detecting the water leakage of the water leakage inspection object 1 is installed on the moving body (for example, the inspection worker 16) performing the patrol inspection, the water leakage sensor 11 is individually applied to the water leakage inspection object 1. The number of water leakage sensors 11 can be reduced as compared with the case where they are installed.

Although some embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention, and their replacements and changes can be made. Is included in the scope and gist of the invention, and is also included in the invention described in the claims and the equivalent scope thereof. For example, the imaging means carried by the moving body is not limited to the camera, and may be a three-dimensional laser scanner or the like.

1 ... Leakage inspection object, 10 ... Leakage monitoring system, 11 ... Leakage sensor, 12 ... Wireless communication module, 13 ... Portable information terminal, 14 ... Camera (imaging means), 15 ... Monitoring PC (monitoring means), 16 ... Inspection worker (moving body), 18 ... Leakage signal receiving unit, 19 ... Leakage notification unit, 20 ... Leakage amount calculation unit, 21 ... Camera shooting instruction unit (imaging means operation instruction unit) 22 ... Leakage information transmission / reception unit, 24 ... repeater, 30 ... leak monitoring system, A1 ... first wireless communication, A2 ... second wireless communication.

Claims (5)

A self-powered leak sensor that generates electricity in the presence of leaks, detects leaks in the subject to be inspected for leaks, and transmits a leak signal via the first wireless communication.
A portable information terminal carried by a mobile body that patrols and inspects various inspection and monitoring items,
It has a monitoring means for monitoring the leak status of the leak inspection object, and has
The portable information terminal calculates the amount of water leakage of the leak inspection object based on the water leakage signal receiving unit that receives the water leakage signal from the water leakage sensor and the water leakage signal received by the water leakage signal receiving unit. It is provided with a water leakage amount calculation unit and a water leakage information transmission / reception unit that transmits water leakage information including the water leakage amount and the position information of the portable information terminal.
The monitoring means is characterized in that the leak information from the leak information transmission / reception unit is received by a second wireless communication via a repeater to monitor the leak status of the leak inspection object. Leakage monitoring system. The moving body is provided with an imaging means, and the portable information terminal further includes an imaging means operation instruction unit that outputs an operation command to the imaging means based on the water leakage signal received by the water leakage signal receiving unit.
The leak monitoring system according to claim 1, wherein the leak information transmission / reception unit of the portable information terminal is configured to include an image captured by the imaging means in the leak information and transmit it to the monitoring means. The moving body is an inspection worker who performs a patrol inspection, and the portable information terminal notifies the inspection worker that water leakage has been detected based on the water leakage signal received by the water leakage signal receiving unit. The leak monitoring system according to claim 1 or 2, further comprising a notification unit. The leak monitoring system according to any one of claims 1 to 3, wherein the leak sensor is individually installed on a leak inspection object or installed on a moving body. We prepared a self-powered leak sensor that generates electricity in the presence of leaks, detects leaks in the subject to be inspected for leaks, and transmits a leak signal via the first wireless communication.
Using a portable information terminal carried by a mobile body that patrols and inspects various inspection and monitoring items, the amount of water leakage is calculated based on the water leakage signal received from the water leakage sensor by the first wireless communication.
A leak monitoring method characterized in that leak information including the leak amount and the position information of the portable information terminal is acquired by a second wireless communication, and the leak status of the leak inspection object is monitored.

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