KR102635752B1 - Sensing line damage judgment device and method thereof - Google Patents

Abstract

The present invention has the following structure.
detection line;
a detection unit configured at certain sections to check whether the detection line is damaged;
In order to check whether the detection line is damaged in each section of the detection unit, a communication unit configured in the detection unit transmits a signal for each section,
The present invention relates to a device for determining whether the detection line is damaged, wherein the communication unit that transmits the signal is configured to monitor damage to the detection line using a relay method with a second communication unit comprised of the next detection unit.

Description

Sensing line damage judgment device and method thereof}

The present invention relates to a device for determining whether a detection line is damaged.

As shown in Figure 6 showing 10-1459623, the error correction function, coefficient, normal specific resistance value, and initial pulse signal characteristic graph of the corresponding channel are read (ST 510), and then the specific resistance of the corresponding channel is measured. (ST 520). It was found that when damage/leakage occurs in a buried pipe constituting a channel, the specific resistance value of that channel increases. Therefore, if the measured specific resistance value is judged to be greater than the normal specific resistance value, it is determined that there is a possibility that damage/leakage has occurred and the step of generating a state characteristic graph of the pulse waveform is performed. Otherwise, the corresponding channel is damaged. /Determine that no leak has occurred (ST 530) and check whether there is a next channel to detect damage/leakage (ST 540). If there is no next channel to inspect, the process ends. If there are any remaining channels, the process starts again from step ST510. In step ST 530, it is described as directly comparing the normal specific resistance value and the measured specific resistance value, but a certain margin may be left. For example, it is of course possible to determine whether the measured specific resistance value is a certain value or more than the normal specific resistance value.

If step ST 530 is determined to be true, a pulse signal is transmitted to the channel currently being tested and a current state characteristic graph is generated from the pulse signal fed back (ST 550). Based on the stored normal pulse signal characteristic graph, the difference with the current state characteristic graph is calculated and a difference graph is generated (ST 560). Next, find the highest peak point in the difference graph (ST 570) and calculate the distance to the peak point (ST 580). A corrected distance value is calculated using the initially set error correction function and coefficient (ST 590), the calculated distance value is transmitted to the server (ST 600), and a test is performed on the next channel.

As shown in Figure 7 showing 10-2187098, the TDR measurement line 11 may be installed on the heat transport pipe 13 for which damage is to be detected. The TDR measurement line 11 may be formed along the entire length of the heat transport pipe 13.

A plurality of manholes 14 may be formed at intervals of a predetermined length of the heat transport pipe 13. The TDR device 12 of the heat transport pipe damage detection system 10 according to various embodiments of the present invention may be installed in the manhole 14. The manhole 14 may include a passage for workers to maintain the TDR device 12 installed in the internal space.

In the heat transport pipe damage detection device 10 according to various embodiments of the present invention, the TDR device 12 includes a control unit 12-1 that performs electrical signal processing, and an electric pulse generator 12-2 that generates electric pulses. ) and a signal detector 12-3 that detects the reflected signal of the electric pulse.

As shown in FIG. 4, the TDR device 12 may be electrically connected to the TDR measurement line 11 using a coaxial cable 15. One of the two conductors of the TDR measurement line 11 is electrically connected to the internal conductor (not shown) constituting the coaxial cable 15, and the other of the two conductors of the TDR measurement line 11 is connected to the coaxial cable. It can be electrically connected to the external conductor constituting (15).

Korea Intellectual Property Office registration number 10-1459623 (2014.11.07) Korea Intellectual Property Office registration number 10-2187098 (2020.12.04)

The first problem that the invention aims to solve is to solve the problem of accurately checking the health of the detection line.

The second problem that the invention aims to solve is to solve the problem of accurately identifying the location of the location where the event occurred.

The third problem that the invention aims to solve is to significantly reduce communication costs.

The fourth problem that the invention aims to solve is to accurately identify the location of underground facilities and build a GIS.

The fifth problem that the invention aims to solve is to solve the problem that when an event occurs, it is transmitted in real time to the manager stored on the server so that necessary actions can be taken immediately.

In order to solve the above problems, it has the following configuration.

detection line;

a detection unit configured at certain sections to check whether the detection line is damaged;

In order to check whether the detection line is damaged in each section of the detection unit, a communication unit configured in the detection unit transmits a signal for each section,

The communication unit that transmits the signal has a detection line damage determination device configured to monitor damage to the detection line using a relay method to the second communication unit configured in the next detection unit.

Here, the communication unit determines whether the detection line is damaged using a relay method, and the LC resonance circuit configured in the detection unit measures the length of the detection line in the opposite direction to the communication unit to accurately measure the location of the detection line where the event occurred. desirable.

Here, it is desirable to further configure the detection unit with an LC resonance circuit that measures the length of the detection line.

Here, it is desirable to configure the LC resonance circuit so that it is not installed in the detection unit located at the last location of the section.

Here, if the signal from the communication unit is normally received by the second communication unit configured as follows, it is preferable to determine that the detection line between the communication unit and the second communication unit is normal.

Here, it is desirable to configure the LC resonance circuit unit built in the detection unit to measure the detection line length at regular intervals and update and store the measured value for each section.

Here, when the signal from the communication unit is not received by the second communication unit configured as follows, the error is reduced to a minimum by comparing the actual detection line length measured for the first time based on the length recently measured by the LC resonance circuit unit. It is desirable.

Here, it is desirable to configure the last configured sensor to transmit a signal by configuring an RTU that can transmit to the server.

Here, when an event occurs on the detection line, it is desirable to configure the event occurrence location to be displayed on the electronic map.

The second embodiment has the following steps.

A detection line configured to connect a plurality of detection units to each other;

A communication unit configured in each of the plurality of detection units;

A signal transmission step of transmitting a signal from the communication unit to a neighboring communication unit through the detection line in a relay method;

A detection line normality determination step of determining whether the detection line is normal depending on whether a signal is received in the signal transmission step;

If the detection line is normal, a server transmission step of transmitting whether the detection line is normal to the server;

The steps above are repeated at regular intervals,

If there is a detection unit that has not received a signal, an abnormality has occurred in the detection line, and an event location determination step of determining the location of the event occurrence in the LC resonance circuit of the detection unit;

A server communication transmission step of transmitting the event location identified in the event location determination step to the server communication unit;

There is a method for determining whether the detection line is damaged at the notification stage, which displays the event location on an electronic map or notifies the manager.

Here, when determining the event location in the event location determination step, an event location comparison step is additionally performed to compare the distance between detection units updated and stored at a certain time during normal times, so that the event location is accurately displayed.

The first effect of the invention is to check the soundness of the detection line.

The second effect of the invention is the ability to accurately confirm the location where an event occurred.

The third effect of the invention is to significantly reduce communication costs.

The fourth effect of the invention is to accurately confirm the location of underground facilities and build a GIS.

The fifth effect of the invention is that when an event occurs, it is transmitted in real time to the manager stored on the server so that necessary actions can be taken immediately.

The sixth effect of the invention is to reduce power consumption.

Figures 1A and 1B are overall diagrams showing the configuration of the 485 communication and LC resonance circuit unit.
Figures 2A to 2C show flow charts of the 485 communication unit and the LC resonance circuit unit.
Figure 3 is a diagram showing an example of parallel resonance.
Figure 4 is a diagram showing the correlation graph between cable length and electric capacity.
Figure 5a shows an example of installing a detection line with a length of 500m on the ground to find a point where a wire break occurred.
Figure 5b shows a 400m detection line buried underground.
Figure 5c shows a state in which distance control controllers are connected to both ends of the detection line.
Figure 5d supplies power to the distance control controller of Figure 5c and a laptop for distance measurement.
Figures 5e and 5f show the capacitance being measured by conducting a disconnection test up to 900m in 100m increments.
Figures 6 and 7 show background technology.

When explained with reference to FIGS. 1A to 2C, it is as follows.

Until now, there has been no technology to prevent entire underground facilities or detect exact leak points in real time.

If a water leak occurred, it was detected later using a flowmeter, water pressure gauge, sonic measurement device, and vibration measurement device.

In addition, when constructing a new pipeline, even if flow meters are installed, there is no way to physically connect the flow meters, and it is more efficient to use Wi-Fi or a short-distance communication network for each individual device.

There was no need to transmit or receive signals using a relay method in other systems.

In the background technology, the existing monitoring method has the problem that it is difficult to check the health of the detection line as it is managed by a single device transmitting and receiving signals, and that it is expensive because an external power source must be used and communication must be performed individually.

In order to objectively check the health of the detection line 600, the present invention sends a signal to the last detection unit 540 in a relay manner through the detection line 600 built into the sheet through 485 communication, and the last installed detection unit It is configured to transmit from (540) to the server to reduce communication costs.

For the above reasons, a detection unit (controller based on 485 communication and LC resonance circuit) is configured at regular intervals, and an RTU that can transmit to the server is added only at the last detection unit (controller and RTU configuration based on 485 communication and LC resonance circuit). It constitutes one piece of equipment.

Additionally, the LC resonance circuit measures and stores the length of the detection line 600 at least every 30 minutes.

This is because, in order to confirm the exact event location, the actual length of the detection line 600 stored during construction must be compared with the length of the most recently measured detection line 600.

In the present invention, a configuration for a relay method was invented because the detection line 600 is connected to the entire pipe network.

A detection line (600) is formed every 2km, which is a certain section.

In order to check whether the detection line 600 is damaged, detection units 500, 510, 520, 530, and 540 are configured at certain sections.

In the present invention, five sensing units (500, 510, 520, 530, 540) are configured.

Up to 32 detection units 500 can be installed, and communication from the first detection unit 500 to the last detection unit 540 is done through the connected detection line 600, so there is no communication cost and power consumption is low. It is economical because solar panels can be configured and used.

Communication costs are incurred only when the detection unit 540, which is installed last, sends a signal to the server, thereby significantly saving communication costs.

In the background technology, each detection unit 500 is monitored and then transmitted to the server, whereas the monitoring system of the present invention installs a plurality of detection units 500 at regular intervals (2,000M), sends a signal in a relay method, and monitors the terminal. There is a significant difference in the method of sending from the detection unit 540 to the server.

In order to check whether the detection line 600 is damaged in each section of the detection unit 500, the communication unit 100 configured in the detection unit 500 transmits a signal for each section.

The communication unit 100 that transmits the signal has a detection line damage determination device configured to monitor damage to the detection line 600 using a relay method to the second communication unit 110 configured in the detection unit 510.

That is, the communication unit 100 transmits a signal to the second communication unit 110.

The second communication unit 110 transmits a signal to the third communication unit 120.

The third communication unit 120 transmits a signal to the fourth communication unit 130.

The fourth communication unit 130 transmits a signal to the fifth communication unit 140.

This is relay transmission.

An LC resonance circuit unit 200 that measures the length of the detection line 600 is further provided in the detection unit 500.

In the drawing, the communication unit 100 checks the signal line through a relay method using 485 communication, and then the LC resonance circuit unit 200 measures and stores the length of the detection line 600 for each section in the opposite direction.

That is, the LC resonance circuit unit 200 measures the length of each section with the first LC resonance circuit unit 210.

Next, the length of each section is measured from the first LC resonance circuit unit 210 to the second LC resonance circuit unit 220.

The second LC resonance circuit unit 220 measures the length of each section up to the third LC resonance circuit unit 230.

As shown in the drawing, the third LC resonance circuit unit 230 measures the length to the sensing unit 500.

The communication unit 100 determines whether the detection line 600 is damaged using a relay method, and the LC resonance circuit unit 200 configured in the detection unit 500 detects the detection line 600 in the opposite direction to the communication unit 100. It is configured to accurately measure the position of the detection line 600 where an event occurred by measuring the length using a relay method.

It is better not to configure the LC resonance circuit unit 200 in the last detection unit 500 of the section (corresponding to the first detection unit as a communication unit).

Since there is no need to send a signal to measure the distance in the next process, there is no need to configure the final detection unit 500.

Configured to determine that the detection line 600 between the communication unit 100 and the second communication unit 110 is normal when the signal from the communication unit 100 is normally received by the second communication unit 110 configured as follows. It will happen.

The LC resonance circuit unit 200 built into the detection unit 500 measures the length of the detection line 600 at regular intervals, updates and stores the measured value for each section, and compares it with the actual distance measured during construction. It is done.

If the signal from the communication unit 100 is not received by the second communication unit 110 configured as follows, the actual detection line 600 length measured for the first time is based on the length recently measured by the LC resonance circuit unit 200. It is desirable to configure it to reduce the error to a minimum compared to .

Additionally, in areas where signals cannot be detected by the communication unit, the distance of the section where the event occurred is measured based on the time the signal is transmitted and received by the LC resonance circuit unit.

It is desirable to configure the last configured detection unit 540 to transmit a signal by configuring an RTU that can transmit to the server.

When an event occurs on the detection line 600, it is desirable to display the location of the event on the electronic map.

When an event occurs, it is configured to be sent in real time to the administrator stored on the server to correct the defect.

If necessary, the last detection unit 540 transmits the message directly to the manager without going through the server.

The location of the event is displayed on the electronic map.

In order to check the exact event location, if 485 communication comes normally from the front detection unit, it is recommended to measure and store the length of the detection line (600) at least every 30 minutes with the LC resonance circuit unit (200) built into the next detection unit.

Build a GIS by measuring real-time pipe joint coordinates to confirm the exact location of the facility.

To reduce maintenance costs, the detection unit 500 is constructed using solar energy.

It is economical because communication costs are incurred only in the last detection unit 540.

When explained with reference to FIGS. 2A to 2C, it is as follows.

The second embodiment has the following steps.

A detection line configured to connect a plurality of detection units to each other;

A communication unit configured in each of the plurality of detection units;

A signal transmission step (S100) of transmitting a signal from the communication unit to a neighboring communication unit through the detection line in a relay method;

A detection line normality judgment step (S200) of determining whether the detection line is normal depending on whether a signal is received in the signal transmission step (S100);

If the detection line is normal, a server transmission step (S300) of transmitting whether the detection line is normal to the server;

The steps above are repeated at regular intervals,

If there is a detection unit that has not received a signal, an abnormality has occurred in the detection line, and an event location determination step (S500) of determining the event occurrence location in the LC resonance circuit of the detection unit;

A server communication transmission step (S600) of transmitting the event location identified in the event location determination step (S500) to the server communication unit;

There is a method for determining whether the detection line is damaged in the notification step (S720), which displays the event location on an electronic map or notifies the manager.

Here, when determining the event location in the event location determination step (S500), an event location comparison step (S550) is additionally performed to compare the distance between detection units updated and stored at a certain time during normal times, so that the event location is accurately displayed. It is done.

In the drawing, the communication unit 100 transmits a signal in a relay manner from the detection unit 500 on the left side to the fifth detection unit 540 on the far right side through 485 communication (S100).

The 485 communication signal transmits the signal in a relay manner, and the detection unit that receives the signal transmits the signal to the next detection unit, repeating as follows.

The drawing of the present invention shows a case in which an 8km signal detection line 600 composed of five detection units is buried.

In actual construction, it may be longer or shorter than this.

Figure 2a shows that when the detection unit 500 transmits a signal to the second detection unit 510 in a relay manner through 485 communication through the detection line 600 and receives the signal from the second detection unit 510,

When the signal is again transmitted from the second detection unit 510 to the third detection unit 520 and the signal is received from the third detection unit 520,

The third detection unit 520 transmits a signal to the fourth detection unit 530 and when the signal is received from the fourth detection unit 530,

The fourth detection unit 530 transmits a signal to the fifth detection unit 540.

Confirm that the 485 communication signal is normally received from the fifth detection unit 540, which is the last detection unit. (S200)

The fifth detection unit 540, which receives the signal, transmits it to the server (not shown) (S300).

After a certain period of time has passed, in the drawing of the present invention, it stays for 2 seconds (S400). By transmitting and receiving signals again in the same process as above, it is determined whether the detection line 600 is normal.

The inspection time can be changed at any time depending on the user's intention.

Normally, the detection line 600 will operate normally, but if a disconnection occurs, the 485 communication signal will not be transmitted from the next detection unit.

That is, this applies to the case where the detection line 600 is not normal.

In that case, since an error has occurred in the detection line 600, the LC resonance circuit section checks in the corresponding detection unit to find the event location (S500).

As for the event location, the length of the detection line 600, which will be explained later, is stored at any time in the LC resonance circuit unit. The stored length is used as basic data to correct the length checked by the LC resonance circuit when an error occurs in the detection line 600 and is used to find the exact event length.

Afterwards, data is transmitted to the server communication unit (S600).

The event location is displayed on the electronic map (S740) or notified to the manager and/or worker (S720) so that immediate action can be taken.

When explained with reference to Figure 2b, it is as follows.

This is a diagram related to measuring the length of the LC resonance circuit.

When the 485 communication signal is received from the fifth detection unit 540, which is the last detection unit (S10), the LC resonance circuit unit 200 configured in the fifth detection unit connects the detection line to the fourth detection unit 530, the next detection unit. (600) Measure the length.

Next, the second LC resonance circuit unit 210 formed in the fourth detection unit 530 measures the distance of the detection line 600 to the third detection unit 520.

Next, the third LC resonance circuit unit 220 formed in the third detection unit 520 measures the distance of the detection line 600 to the second detection unit 510.

Next, the fourth LC resonance circuit unit 230 configured in the second detection unit 510 measures the distance of the detection line 600 to the detection unit 500.

It is possible to store the distance measured by the LC resonance circuit unit configured in each detection unit in each detection unit, or to transmit and store the measured detection line 600 distance at the corresponding location to the server.

The LC resonance circuit checks each section (S20) and stores the detection line distance (S30).

At 30-minute intervals (S40), the LC resonance circuit unit measures the distance and updates the detection line 600 distance.

The time interval can be changed at any time depending on the user's intention.

Figure 2c is as follows.

Regardless of signal reception of 485 communication, the LC resonance circuit checks the length of the detection line 600 at regular time intervals (S40) and stores the length of the detection line 600 (S30).

The description of Figures 3 and 4 is as follows.

Electrical capacity (capacitor, C) exists between two adjacent cables. The total distance and electric capacity of two adjacent cables are proportional, and the total length of the cable can be calculated by measuring the electric capacity.

To measure electrical capacitance, the principle of LC resonance circuit is used. L is called an inductor, and is an electronic component that stores energy by generating a magnetic field for a short period of time. It is generally made by forming a wire coil around electrons.

In an LC circuit combined in series/parallel, the inductor and capacitor accumulate and release energy through electric and magnetic fields, and the process of exchanging energy is exactly balanced, which is called resonance.

Figure 3 shows an example of parallel resonance.

This device can measure desired values through frequency values using the characteristics of inductors and capacitors.

The distance is calculated by measuring and then calculating the electric capacity of the cable connected to the distance measurement controller using the resonance frequency through the LCMeter (L (Inductor) C (Capacitor) circuit built into the distance measurement controller.

(One)

(2)

(3)

(1) The formula is a frequency formula using an LC resonance circuit, and the frequency and electric capacity can be obtained.

(2) The formula is connected in parallel to the reference capacitance (Cref) and C of the LC resonance circuit through calibration to obtain the frequency f2, and using f1 and f2, the accurate capacitance of the distance measuring device can be measured.

(3) The formula changes the value of frequency f2 based on the electric capacity obtained through calibration and the electric capacity (Cx) of the cable, and the electric capacity (Cx) of the cable can be calculated through the exact frequency value, L, and electric capacity.

The value of Cx is proportional to the length of the cable, and the cable length can be obtained through calculation.

According to Figure 4, the following is the result of organizing the correlation between cable length and electric capacity as a function. This is the result of measuring electric capacity for each cable length and obtaining a nonlinear function based on this. The X-axis represents electrical capacitance in nanoferrets (nF), and the Y-axis represents cable length (m).

This principle is used to construct a measuring device for the sensing line. If the length is obtained in this way, the distance to the damaged or cut portion can be measured with an accuracy of 98% to 98.8%.

The way to check whether a wire is disconnected is to determine that the detection line is cut if the rear detection device (#2:510) does not receive the signal sent from the front detection unit (#1:500) within a specified time.

The method of checking the disconnection location is explained according to the resonance frequency distance measurement principle below.

In other words, there is electric capacity (capacitor, C) between two adjacent cables. The total distance and electric capacity of two adjacent cables are proportional, and the total length of the cable can be calculated by measuring the electric capacity.

For example, if the length of the detection line between the #1 detection unit 500 and the #2 detection unit 510 is constant, the electric capacitance existing between the detection units is the same, and if the detection line is cut in the middle, the electric capacity decreases. do. Therefore, the location of the detection line disconnection can be found using the function value.

#n-2, #n-1, #n, where n is an integer, indicating that it is possible to configure multiple detection units.

However, the electrical capacity of sensing wires buried underground may vary due to various reasons such as temperature and humidity, even if the sensing wire is of the same length. Therefore, in order to reduce errors regarding the location of damage to the sensing line, the electric capacity of the sensing line for each section is measured and stored at regular intervals, so that the exact location can be confirmed when an event occurs.

Table 1

The actual experimental cable length and electric capacity relationship data are as follows.

It can be seen that it has a similar form to the above correlation graph.

The x-axis represents capacitance and nF is nanofarads.

The y-axis represents the cable length, and the unit is m.

By measuring the capacitance according to the table above, the distance at which the disconnection occurs can be accurately measured.

When explained according to Figures 5a to 5f, it is as follows.

Figure 5a shows an example of installing a detection line with a length of 500m on the ground to find a point where a wire break occurred. Figure 5b shows a 400m detection line buried underground.

Figure 5c shows a state in which distance control controllers are connected to both ends of the detection line.

Figure 5d supplies power to the distance control controller of Figure 5c and a laptop for distance measurement.

Figures 5e and 5f show the capacitance being measured by performing a disconnection test up to 900m in 100m increments.

In this test example, the 900m sensing cable was divided into six sections and each connection was disconnected to test whether or not a disconnection was detected. As a result, the measurement accuracy of the average pupil position was found to be 98.8%. Based on the device controller that detects disconnection, as the disconnection distance increases, the measurement accuracy appears to decrease to within 1%, but it was confirmed that the performance index target of 98% was met.

Terms or words used in this specification and claims should not be construed as limited to their common or dictionary meanings, and the inventor may appropriately define the concept of terms in order to explain his or her invention in the best way. It must be interpreted with meaning and concept consistent with the technical idea of the present invention based on the principle that it is.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, so at the time of filing this application, they can be replaced. It should be understood that various equivalents and variations may exist.

100: Communication Department 110: Second Communication Department 120: Third Communication Department 130: Fourth Communication Department
140:Fifth Communications Department
200: LC resonance circuit 210: 2nd LC resonance circuit 220: 3LC resonance circuit
230: 4th LC resonance circuit unit
300: Switching circuit unit 400: Server communication unit
500: Detection unit 510: 2nd detection unit 520: 3rd detection unit 530: 4th detection unit
540: Fifth detection unit
600: detection line

Claims (11)

detection line;
a detection unit configured at certain sections to check whether the detection line is damaged;
In order to check whether the detection line is damaged in each section of the detection unit, a communication unit configured in the detection unit transmits a signal for each section,
A signal is sent to the detection unit configured with the server communication unit in a relay manner through the detection line, and the signal is transmitted from the detection unit configured with the server communication unit to the server, thereby reducing communication costs,
The communication unit that transmits the signal is configured to monitor damage to the detection line using a relay method with a second communication unit consisting of the next detection unit,
If the signal from the communication unit is normally received by the second communication unit, it is configured to determine that the detection line between the communication unit and the second communication unit is normal, and if the signal is not received, it is configured to determine that the detection line is damaged; ,
A device for determining whether a sensing line is damaged, characterized in that the sensing unit includes an LC resonance circuit that measures the length of the sensing line. The method of claim 1, wherein the communication unit determines whether the detection line is damaged using a relay method, and the LC resonance circuit configured in the detection unit measures the length of the detection line in a direction opposite to the communication unit to accurately determine the location of the detection line where an event occurred. A sensing line damage determination device characterized by being configured to measure. delete The device for determining whether a detection line is damaged according to claim 1, wherein the LC resonance circuit is configured not to be included in the detection unit in which the server communication unit is configured. delete The device for determining whether a detection line is damaged according to claim 1, wherein the LC resonance circuit unit built in the detection unit measures the length of the detection line at regular intervals and updates and stores the measured value for each section. According to claim 6, if the signal from the communication unit is not received by the second communication unit configured as follows, the error is minimized by comparing the actual detection line length first measured based on the length recently measured by the LC resonance circuit unit. A sensing line damage determination device characterized in that it is configured to reduce to . The device for determining whether a detection line is damaged according to claim 1, wherein the detection unit configured with the server communication unit is configured to transmit a signal by configuring an RTU that can be transmitted to the server. The detection method according to any one of claims 1, 2, 4, and 6 to 8, wherein when an event occurs on the detection line, the location of the event is displayed on the electronic map. Line damage judgment device. A detection line configured to connect a plurality of detection units to each other;
A communication unit configured in each of the plurality of detection units;
A signal transmission step of transmitting a signal from the communication unit to a neighboring communication unit through the detection line in a relay method;
A detection line normality determination step of determining whether the detection line is normal depending on whether a signal is received in the signal transmission step;
If the detection line is normal, a server transmission step of transmitting whether the detection line is normal to the server;
It has the steps of repeating the signal transmission step, the detection selection normality judgment step, and the server transmission step at regular intervals,
If there is a detection unit that does not receive a signal, an abnormality occurs in the detection line, and an event location determination step to determine the location of the event due to the LC resonance circuit of the detection unit in the detection line normality determination step;
A server communication transmission step of transmitting the event location identified in the event location determination step to the server communication unit;
A method for determining whether a detection line is damaged, characterized by having a notification step of displaying the event location on an electronic map or notifying the manager. According to claim 10, when determining the event location in the event location determination step, an event location comparison step is additionally provided to compare the distance between detection units updated and stored at a certain time in normal times to accurately display the event location. A method for determining whether a sensing line is damaged.