KR20230037268A - Sensing line damage judgment device and method thereof - Google Patents

Abstract

The present invention relates to an apparatus for determining whether a sensing line is damaged and a method thereof. The apparatus for determining whether the sensing line is damaged of the present invention comprises: the sensing line; and a sensing unit configured for each predetermined section to check whether the sensing line is damaged. According to the present invention, in order for the sensing unit to check whether or not the sensing line is damaged for each section, a signal is transmitted for each section from a communication unit configured in the sensing unit. In addition, in the communication unit transmitting the signal, a second communication unit composed of the next sensing unit monitors whether or not the sensing line is damaged in a relay manner.

Description

Sensing line damage judgment device and method thereof

The present invention relates to a device for determining whether a sensing wire is damaged.

As shown in FIG. 6 showing 10-1459623, the error correction function, coefficient, normal resistivity 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 the buried pipe constituting a channel, the specific resistance value of the corresponding channel increases. Therefore, if it is determined that the measured specific resistance value is greater than the normal specific resistance value, it is determined that there is a possibility that damage/leakage has occurred and proceeds with the step of generating a state characteristic graph of the pulse waveform. / It is determined that no leakage has occurred (ST 530), and whether there is a next channel to detect damage/leakage is checked (ST 540). If there is no next channel to be examined, it ends, and if the next channel remains, it proceeds again from step ST510. In step ST 530, it was described as directly comparing the specific resistance value at normal times with the measured specific resistance value, but a certain margin may be provided. For example, it is of course possible to determine whether or not the measured specific resistance value is greater than a certain value than the specific resistance value in normal conditions.

If it is determined that step ST 530 is true, a pulse signal is transmitted to the channel currently under examination, and a current state characteristic graph is generated from the feedback pulse signal (ST 550). Based on the stored normal state pulse signal characteristic graph, a difference graph is created after obtaining a difference from the current state characteristic graph (ST 560). Next, the highest peak point is found in the difference graph (ST 570), and the distance to the peak point is calculated (ST 580). A corrected distance value is calculated using the initially set error correction function and coefficient for the calculated distance value (ST 590), the calculated distance value is transmitted to the server (ST 600), and a test for the next channel is performed.

As shown in FIG. 7 showing 10-2187098, a TDR instrumentation line 11 may be installed over a heat transport pipe 13 for which damage is to be detected. The TDR measurement line 11 may be formed over 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 an operator's movement passage for maintenance of the TDR device 12 installed in the inner space.

In the heat transport pipe damage detection apparatus 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 electrical pulse generator 12-2 that generates electrical pulses. ) and a signal detector 12-3 for detecting a 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 an internal conductor (not shown) constituting the coaxial cable 15, and the other of the two conductors of the TDR measurement line 11 is the coaxial cable. It can be electrically connected to an external conductor constituting (15).

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

The first problem to be solved by the present invention is to solve the problem of accurately checking the soundness of the sensing line.

The second problem to be solved by the present invention is to solve the problem of accurately confirming the position of the place where the event occurred.

The third problem to be solved by the present invention is to solve the problem of significantly reducing the communication cost.

The fourth task to be solved by the invention is to accurately determine the location of underground facilities and to solve the task of constructing a GIS.

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

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

sensing line;

a sensing unit configured for each predetermined section to check whether the sensing line is damaged;

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

The communication unit that transmits the signal has a sensing line damage determination device configured to monitor whether or not the sensing line is damaged in a relay manner to a second communication unit configured in the next sensing unit.

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

Here, it is preferable to further configure an LC resonant circuit unit for measuring the length of the sensing line in the sensing unit.

Here, it is preferable to configure the LC resonant circuit unit not to be configured in the sensing unit configured at the end of the section.

Here, it is preferable to configure the detection line between the communication unit and the second communication unit to determine that the signal is normal when the signal of the communication unit is normally received by the second communication unit configured next.

Here, it is preferable to configure the LC resonant circuit built in the sensing unit to measure the length of the sensing line at regular intervals, update the measured value for each section, and store it.

Here, when the signal of the communication unit is not received by the second communication unit configured next, the length recently measured by the LC resonance circuit unit is compared with the actual sensing line length measured for the first time to configure to reduce the error to a minimum it is desirable

Here, it is preferable to configure the sensing unit configured last to transmit a signal by configuring an RTU capable of transmitting to a server.

Here, when an event occurs in the sensing line, it is preferable to display the location of the event on the electronic map.

The second embodiment has the following steps.

a sensing line configured to connect a plurality of sensing 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 an adjacent communication unit through the sensing line in a relay manner;

a detection line normality determination step of determining whether or not the detection line is normal according to whether a signal is received in the signal transmission step;

a server transmission step of transmitting whether or not the detection line is normal to a server when the detection line is normal;

Repeating the above steps at regular intervals,

If there is a sensing unit that has not received a signal, an error occurs in the sensing line, and an event position identification step of identifying an event occurrence location in the LC resonance circuit unit of the sensing unit;

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

It has a method for determining whether or not the detection line is damaged in a notification step of displaying the event location on an electronic map or notifying a manager.

Here, when the event location is determined in the event location detection step, an event location comparison step of comparing with the distance between the sensing units updated and stored at regular times in normal conditions is additionally provided to accurately display the event location.

The first effect of the invention is to have the effect of confirming the soundness of the sensing line.

As a second effect of the invention, there is an effect of accurately confirming the position of the place where the event occurred.

The third effect of the invention is to have the effect of significantly reducing the communication cost.

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

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

The sixth effect of the invention is to have an effect of reducing power consumption.

1a and 1b are overall diagrams showing the configuration of the 485 communication and LC resonant circuit.
2a to 2c are diagrams showing a flow chart of the 485 communication unit and the LC resonant circuit unit.
3 is a diagram showing an embodiment of parallel resonance.
4 is a diagram showing a correlation graph between cable length and capacitance.
Figure 5a is a diagram showing the installation of a detection line with a length of 500 m on the ground as an example for finding a place where a disconnection has occurred.
Figure 5b is a diagram showing that a 400m detection line is buried in the ground.
5C is a diagram showing a state in which distance control controllers are connected to both ends of the sensing line.
5d supplies power to the distance control controller of FIG. 5c and a notebook for distance measurement.
5E and 5F are diagrams showing that capacitance is measured by performing a disconnection test up to 900m in units of 100m.
6 and 7 are views showing the background art.

Referring to FIGS. 1A to 2C , it is as follows.

Until now, there has been no technology with the concept of preventing the entire underground facility or detecting the exact leak point in real time.

In the case of leakage, it was detected posthumously using a flow meter, a water pressure meter, a sound wave measuring device, and a vibration measuring device.

In addition, this is because there is no way to physically connect flowmeters even if flowmeters are installed when a pipeline is newly established, and it is efficient to use Wi-Fi or a short-range communication network for each individual device.

There was no need to send and receive signals in a relay manner in other systems.

In the background art, the existing monitoring method has problems in that it is difficult to check the integrity of the sensing line in a way that one equipment transmits and receives signals and manages it, 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 soundness of the sensing line 600, the present invention sends a signal to the last sensing unit 540 in a relay manner through the sensing line 600 embedded in the seat through 485 communication, and the last installed sensing unit It is configured to transmit to the server at 540 so that communication costs can be reduced.

For the same reasons as above, the sensing unit (controller based on 485 communication and LC resonant circuit) is configured at regular intervals, and only the last sensing unit (configuration of controller and RTU based on 485 communication and LC resonance circuit) adds an RTU that can transmit to the server to make up a piece of equipment.

In addition, the length of the sensing line 600 is measured and stored at least every 30 minutes by the LC resonance circuit unit.

This is because it is necessary to compare the actual length of the sensing line 600 stored during construction with the most recently measured length of the sensing line 600 in order to confirm the exact location of the event.

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

A sensing 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 for each predetermined section.

In the present invention, the sensing unit is constituted by 5 locations (500, 510, 520, 530, 540).

Up to 32 sensing units 500 can be installed, and communication from the first sensing unit 500 to the last sensing unit 540 is performed through the connected sensing line 600, so there is no communication cost and low power consumption. It is economical because it can be used by constructing a solar panel.

Since the communication cost is generated only when the sensor 540 installed at the end sends a signal to the server, the communication cost can be remarkably saved.

In the background art, monitoring is performed for each sensing unit 500 and then transmitted to the server, whereas the monitoring system of the present invention installs a plurality of sensing units 500 at regular intervals (2,000M), transmits a signal in a relay manner, monitors the last There is a significant difference in the way the sensor 540 sends it to the server.

In order to check whether the sensing line 600 is damaged for each section in the sensing unit 500, the communication unit 100 configured in the sensing 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 whether the detection line 600 is damaged in a relay manner to the second communication unit 110 configured in the next 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 .

relay transmission.

An LC resonance circuit unit 200 for measuring the length of the sensing line 600 is further configured in the sensing unit 500.

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

That is, in the LC resonance circuit unit 200, the length of each section is measured 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 .

In the second LC resonance circuit unit 220, the length of each section up to the third LC resonance circuit unit 230 is measured.

As shown in the figure, 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 in a relay manner, and the LC resonance circuit unit 200 configured in the detection unit 500 connects the detection line 600 in the opposite direction to the communication unit 100 It is configured to accurately measure the position of the sensing line 600 where an event occurred by measuring the length in a relay manner.

It is preferable not to configure the LC resonant circuit part 200 in the last sensing part 500 of the section (corresponding to the first sensing part as a communication part).

There is no need to send a signal for measuring the distance in the next process, and there is no need to configure the last sensing 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 of the communication unit 100 is normally received by the second communication unit 110 configured next It will be.

In the LC resonance circuit unit 200 built into the sensing unit 500, the length of the sensing line 600 is measured at regular intervals, and the measured value for each section is updated and stored to compare with the actual distance measured during construction. is to do

When the signal of the communication unit 100 is not received by the second communication unit 110 configured next, the length of the actual sensing line 600 first measured based on the length recently measured by the LC resonance circuit unit 200 It is preferable to configure to reduce the error to a minimum compared to .

In addition, in the area where the signal is not detected by the communication unit, the distance of the section where the event occurs is measured by the time when the signal is transmitted and received by the LC resonance circuit unit.

It is preferable to configure the RTU that can be transmitted to the server in the sensing unit 540 configured last and transmit the signal.

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

When an event occurs, it is configured to be transmitted in real time to the manager stored in the server to repair the defect.

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

The event location is displayed on the electronic map.

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

Establish GIS by measuring pipe joint coordinates in real time to confirm the exact location of the facility.

In order to reduce maintenance costs, the sensing unit 500 is configured using sunlight.

It is economical because the communication cost is generated only in the last sensing unit 540 .

Referring to FIGS. 2A to 2C , it is as follows.

The second embodiment has the following steps.

a sensing line configured to connect a plurality of sensing 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 an adjacent communication unit through the sensing line in a relay manner;

a detection line normality determination step (S200) of determining whether or not the detection line is normal according to 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 or not the detection line is normal to the server;

Repeating the above steps at regular intervals,

If there is a sensing unit that has not received a signal, an error occurs in the sensing line, and an event position identification step (S500) of determining an event occurrence location in the LC resonance circuit unit of the sensing unit;

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

It has a method for determining whether or not the detection line is damaged in the notification step (S720) of displaying the event location on an electronic map or notifying a manager.

Here, when the event location is determined in the event location detection step (S500), an event location comparison step (S550) is additionally provided to compare with the distance between the sensing units updated and stored at regular times in normal conditions to accurately display the event location. is to do

In the drawing, the communication unit 100 transmits a signal in a relay manner from the left sensing unit 500 to the rightmost fifth sensing unit 540 through 485 communication. (S100)

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

In the drawing of the present invention, it is a diagram showing a case where an 8Km signal detection line 600 composed of five detection units is buried.

In practice, it may be longer or shorter than this.

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

When a signal is transmitted from the second sensing unit 510 to the third sensing unit 520 and the signal is received by the third sensing unit 520,

When the third sensing unit 520 transmits a signal to the fourth sensing unit 530 and receives the signal from the fourth sensing unit 530,

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

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

The fifth sensing unit 540 receiving the signal transmits it to a server (not shown). (S300)

After a certain period of time, the drawing of the present invention stays for 2 seconds. (S400) Signals are transmitted and received again in the same process as above to determine whether the sensing line 600 is normal or not.

The inspection time can be changed at any time according to the user's intention.

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

That is, this corresponds to the case where the sensing line 600 is not normal.

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

As the event position, the length of the sensing line 600, which will be described later, is frequently stored in the LC resonance circuit unit. The stored length is used as basic data to correct the length checked by the LC resonance circuit unit when an error occurs in the sensing line 600, and is used to find an accurate event length.

After that, 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 operator (S720) so that immediate action can be taken.

Referring to Figure 2b, it is as follows.

It is a diagram related to the measurement of the length of the LC resonant circuit part.

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

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

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

Next, the fourth TDR 230 configured in the second sensing unit 510 measures the distance of the sensing line 600 to the sensing unit 500 .

It is possible to store the distance measured by the LC resonant circuit unit composed of each sensing unit in each sensing unit or to transmit and store the measured distance of the sensing line 600 at a corresponding location to a server.

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

The distance of the sensing line 600 is updated by measuring the distance from the LC resonance circuit at 30-minute intervals (S40).

The time interval can be changed at any time according to 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 sensing line 600 at regular time intervals (S40) (S20) and stores the length of the sensing line 600 (S30).

3 and 4 are described as follows.

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

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

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

3 is a diagram showing an example of parallel resonance.

This device can measure a desired value through a frequency value using the characteristics of an inductor and a capacitor.

Using the resonant frequency through the LCMeter (L (Inductor) C (Capacitor) circuit built into the distance measurement controller, the electric capacitance of the cable connected to the distance measurement controller is measured and calculated to calculate the distance.

(1)

(One)

(2)

(2)

(3)

(3)

(1) The formula is a frequency formula using an LC resonant circuit, and the frequency and capacitance can be obtained.

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

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

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

The following is the result of organizing the correlation between cable length and capacitance as a function according to Figure 4, and the result of measuring the capacitance for each cable length and obtaining a nonlinear function based on this. The X axis is the capacitance, the unit is nanoferad (nF), and the Y axis is the cable length (m).

A measuring device for the sensing tip is constructed using this principle. 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%.

In the method of checking whether or not the wire is disconnected, if the signal sent from the front sensor (#1:500) is not received by the rear sensor (#2:510) within a set time, it is determined that the sensor line is cut.

The way to check the disconnection location will be explained according to the resonance frequency distance measurement principle below.

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

For example, if the length of the sensing line between the #1 sensing unit 500 and the #2 sensing unit 510 is constant, the capacitance existing between the sensing units is the same, and if the sensing line is cut in the middle, the capacitance decreases. do. Therefore, the disconnection position of the sensing line 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 sensing units.

However, the capacitance of the sensing line buried underground may vary due to various reasons such as temperature and humidity, even if the sensing line has the same length. Therefore, in order to reduce the error on the location of the breakage of the sensing line, the capacitance 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 capacitance relationship data are as follows.

It can be seen that the shape is similar 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 capacitance according to the above table, it is possible to accurately measure the distance where disconnection occurred.

Referring to FIGS. 5A to 5F, it is as follows.

Figure 5a is a diagram showing the installation of a detection line with a length of 500 m on the ground as an example for finding a place where a disconnection has occurred. Figure 5b is a diagram showing the 400m detection line buried in the ground.

5C is a diagram showing a state in which distance control controllers are connected to both ends of the sensing line.

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

5E and 5F are diagrams showing that capacitance is measured by performing a disconnection test up to 900m in units of 100m.

In this test embodiment, a 900m sensing line cable was divided into six sections and disconnection detection was tested by disconnecting each connection part. As a result, the measurement accuracy for the average pupil position was 98.8%. Based on the device controller that detects disconnection, as the disconnection distance increases, the measurement accuracy seems to decrease to within 1%, but it was confirmed that the target of 98% of the performance index was met.

The terms or words used in this specification and claims should not be construed as being limited to ordinary or dictionary meanings, and the inventors may appropriately define the concept of terms in order to explain their invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that there 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 all the technical ideas of the present invention, so at the time of this application, they can be replaced. It should be understood that there may be many equivalents and variations.

100: communication unit 110: second communication unit 120: third communication unit 130: fourth communication unit
140: 5th communication department
200: LC resonance circuit part 210: 2nd LC resonance circuit part 220: 3rd LC resonance circuit part
230: 4th LC resonance circuit unit
300: switching circuit unit 400: server communication unit
500: sensing unit 510: second sensing unit 520: third sensing unit 530: fourth sensing unit
540: fifth sensing unit
600: detection line

Claims (11)

sensing line;
a sensing unit configured for each predetermined section to check whether the sensing line is damaged;
In order to check whether the sensing line is damaged for each section in the sensing unit, a communication unit configured in the sensing unit transmits a signal for each section,
The communication unit for transmitting the signal is configured to monitor whether or not the detection line is damaged in a relay manner to a second communication unit configured in the next detection unit. The method of claim 1, wherein the communication unit determines whether or not the sensing line is damaged in a relay manner, and the LC resonance circuit configured in the sensing unit measures the length of the sensing line in the opposite direction to the communication unit to accurately measure the position of the sensing line where an event occurred Characterized in that configured to determine whether the detection line is damaged. [Claim 2] The device for determining whether or not the sensing line is damaged according to claim 1, further comprising an LC resonance circuit unit measuring the length of the sensing line in the sensing unit. [4] The device for determining whether or not the sensing line is damaged according to claim 3, wherein the LC resonant circuit unit is not configured in the sensing unit configured at the end of the section. The method according to claim 1, wherein the detection line is configured to determine that the detection line between the communication unit and the second communication unit is normal when the signal of the communication unit is normally received by the second communication unit configured next. Device. The apparatus for determining whether or not the sensing line is damaged according to claim 1, wherein the LC resonant circuit unit built into the sensing unit measures the length of the sensing line at regular intervals and updates and stores the measured value for each section. The method of claim 6, when the signal of the communication unit is not received by the second communication unit configured next, the length recently measured by the LC resonance circuit unit is compared with the first measured actual sensing line length to minimize the error A device for determining whether or not the sensing line is damaged, characterized in that configured to reduce. [Claim 2] The device for determining whether or not the sensing line is damaged according to claim 1, wherein the sensing unit configured lastly configures an RTU capable of transmitting to a server and transmits a signal. The device for determining whether or not the sensing line is damaged according to any one of claims 1 to 8, characterized in that it is configured to display an event location on an electronic map when an event occurs in the sensing line. a sensing line configured to connect a plurality of sensing 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 an adjacent communication unit through the sensing line in a relay manner;
a detection line normality determination step of determining whether or not the detection line is normal according to whether a signal is received in the signal transmission step;
a server transmission step of transmitting whether or not the detection line is normal to a server when the detection line is normal;
Repeating the above steps at regular intervals,
If there is a sensing unit that has not received a signal, an error occurs in the sensing line, and an event position identification step of identifying an event occurrence location in the LC resonance circuit unit of the sensing unit;
a server communication unit transmission step of transmitting the event location identified in the event location determination step to a server communication unit;
and a notification step of displaying the event location on an electronic map or notifying a manager. 11. The method of claim 10, when the event location is determined in the event location detection step, an event location comparison step is additionally provided to compare the event location with the distance between the sensing units that is updated and stored at regular times in normal conditions, thereby accurately displaying the event location. Method for determining whether or not the sensing line is damaged.

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