KR101459623B1 - Apparatus for detecting damage location of buried pipes and detecting method - Google Patents

Abstract

The present invention relates to a device and a method for detecting the damaged position of buried pipes. The objective of the present invention is to detect the damaged position of buried pipes. The present invention is composed of multiple channels. Multiple buried pipes are continuously connected to each other in one channel under the ground. Detection lines electrically connected to each other are installed in the multiple buried pipes. The present invention comprises access doors formed at multiple spots where the multiple buried pipes are longitudinally connected to each other, and in which exposed access door detection lines electrically connected to the detection lines are installed to be exposed to the ground surface. The present invention provides a device and a method for detecting damaged position of buried pipes capable of detecting the accurate damaged position by calculating the damaged position measured by a pulse measurement part to an actual damaged position value using an error correction function for correcting the measured length value of a signal line connected to the relevant access door to the actual length value of signal lines connected to the access doors using pulse signals fed back after being applied from the access doors.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus and method for detecting buried pipes,

More particularly, the present invention relates to a high-strength tracker for a buried pipe for detecting an accurate position where an abnormality such as leakage is detected in a buried pipe wound with a detection wire, And a detection method.

The buried pipe includes a pipe buried underground for transporting water, sewage, gas, oil, waste, electric wire, communication line, etc., and each buried pipe is generally constructed along a river or a road.

It is assumed that the buried pipe includes a tube for protecting the sensor from external impact by wiring a sensing line capable of transmitting and receiving a sensing signal.

There are flexible pipes composed of steel pipe, PE pipe, double wall PE pipe, laminated wall PE pipe, PVC pipe, etc., which include coated steel pipes, Hume pipes, PC pipes, cast iron pipes and resin concrete pipes, And is selected and used suitably.

In order to detect breakage / leakage of the buried pipe, the applicant of the present invention has found that, as shown in Patent Document 1, in 2002, the detection line was buried in the outer circumferential surface of the buried pipe or inside the pipe to easily detect the breakage / A proposed buried pipe is produced by a pipe manufacturer and is being constructed all over the country.

Due to the emergence of buried pipes equipped with such sensing wires, various derivative technologies are emerging. As shown in Patent Document 2, for example, a surveillance tape is separately buried in the upper part of a buried pipe, and buried pipes existing in the course of the excavation work using a heavy equipment can be damaged / leaked by such a monitoring tape, A system for confirming breakage / breakage of a buried pipe preventing breakage of buried pipes, and a method for operating the system for identifying a breakage / leakage location have been proposed.

However, since the buried pipe developed by the applicant of the present invention by using the patent document 1 and the related art is actually landfilled and the damage position is detected for many years, many errors are detected in detecting the breakage / leakage location, And it was difficult to replace the incomplete buried pipe.

Patent Document 1: Korean Patent Publication No. 2003-0093508 (published on December 11, 2003) Patent Document 2: Korean Patent No. 1173592 (registered on August 07, 2012)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a high-strength tracking device and method for detecting a breakage / leakage position in a buried pipe having a sensing line, .

The above object of the present invention is achieved by a plasma display panel comprising a plurality of channels, wherein a plurality of buried pipes are successively connected to one another in a channel, the plurality of buried pipes are provided with a sensing line provided to be electrically connected to each other, A high-strength tracking device for detecting a breakage / leakage position of a buried pipe having an inspection port provided in a plurality of locations connected to each other in a longitudinal direction of a plurality of buried pipes, the inspection port being provided so that an inspection port exposure sensing line electrically connected to the sensing line is exposed to the ground surface, A pulse signal measuring unit for measuring a damage position value by applying a pulse signal to a sensing line and using a pulse signal to be fed back and a pulse signal measuring unit for measuring a signal line connected to the corresponding check point by applying a pulse signal at each check point, An error correction function for correcting the length value to the actual length value of the signal line connected to each check port A central processing unit for calculating a breakage position measured by the pulse signal measurement unit as an actual breakage position value using the error correction function, and a transmission / reception modem for transmitting an actual breakage position value to the outside, Can be achieved by a high-performance tracking device.

It is a further object of the present invention to provide a plasma display panel in which a plurality of submerged tubes are continuously connected to each other in a channel and a sensing line is provided to be electrically connected to the plurality of submerged tubes, A method for detecting a breakage position of a buried pipe having an inspection port provided in a plurality of points connected to each other in the longitudinal direction of the plurality of buried pipes, the inspection port being provided to expose an inspection port exposure sensing line to an earth surface, And an error correction function for correcting the measured length value to an actual length value of a signal line connected to each check port by measuring a measured length value of a signal line connected to the corresponding check point by applying a pulse signal and using a feedback pulse signal, A first stage, and an initial stage in which a buried pipe connected to each channel is buried, A second step of measuring the intrinsic resistance value of the test tube and measuring the intrinsic resistance value of the test tube and storing the measured resistance value using the sensing line and storing the intrinsic resistance value of the buried tube connected to each channel at the time of operating the buried tube connected to each channel, And a fourth step of comparing the intrinsic resistance values measured in the second and third steps with a third step of measuring the damage point of the buried pipe, Do.

According to the high-strength tracker and detection method of the buried pipe according to the present invention, it is possible to easily detect whether breakage / leakage has occurred in the buried pipe forming the channel by measuring the resistance value of each channel.

In addition, by storing the characteristic graph according to the buried pipe forming each channel in advance, it is possible to easily detect the accurate damage location by converting the measured damage location value into accurate real damage location value. Therefore, it is possible to prevent unnecessary construction such as digging for replacing the wrong buried pipe when applying the conventional breakage position detection method which is difficult to grasp the exact breakage position.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall structural view of a system for detecting a failure position of a buried pipe, which is an embodiment of the present invention; FIG.
FIG. 2 shows an embodiment of a buried pipe device provided in one channel connected to a high-strength tracking device according to an embodiment of the present invention. FIG.
3 is an installation sectional view of an inspection port, which is an embodiment of the present invention installed in a buried pipe apparatus;
FIG. 4 is a flowchart showing a process of initially setting a damaged position detection system of a buried pipe according to the present invention; FIG.
FIG. 5 is a flowchart illustrating a method of detecting a breakage occurring during a process of operating a breakage location detecting system of a buried pipe according to the present invention. FIG.
FIG. 6 is a graph showing a graph of a normal-time pulse signal characteristic and a current-state characteristic graph measured using a pulse signal measuring unit in a high-performance tracking apparatus; FIG.
FIG. 7 is a graph showing a difference graph of the two pulse signals shown in FIG. 6;

In the following, preferred embodiments, advantages and features of the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall block diagram of a failure location detecting system for a buried pipe, which is an embodiment of the present invention. FIG. The fault location detection system includes a plurality of fault location tracking devices 30 for applying a pulse signal or the like to a buried pipe device connected to a plurality of channels and detecting breakage / And a central sensing device (60).

The high-strength tracking device 30 detects whether breakage / leakage has occurred in the buried pipe connected to each channel, detects the breakage position in the event of breakage / leakage, To the sensing device (60). Specifically, the high-performance tracking device 30 includes a transmission / reception modem, a pulse signal measurement unit, a resistance measurement unit, a data logger unit, a multi-channel device unit, a screen display unit, a noise filter and power unit, a central processing unit,

The transmission / reception modem is a device for transmitting / receiving data to / from the central sensing device via the communication network 50. The pulse signal measurement unit analyzes the pulse signal fed back to the sub-pipe device connected to each channel after applying the pulse signal 200a , And the resistance measuring unit measures the resistance applied to the buried pipe connected to each channel. In case a communication error or the like occurs, the data logger unit can not transmit the data values measured by the pulse signal measuring unit and / or the resistance measuring unit to the central sensing unit 60, And the data measured by the resistance measuring unit is stored for a predetermined period of time.

The interface unit is a device for interfacing the transmission / reception modem, the pulse signal measurement unit, the resistance measurement unit, the screen display unit, and the memory unit. The screen display unit displays the data measured by the pulse signal measurement unit and / or the resistance measurement unit on the screen. The noise filter is a device for removing noise contained in an external power supply, and the power supply is a device for supplying power to each component. The central processing unit uses the resistance value measured by the resistance measuring unit and analyzes the feedback pulse after applying the pulse through the pulse signal measuring unit when it is determined that the buried pipe apparatus connected to each channel has a high possibility of breakage / And corrects the measured value to calculate the actual failure position. The memory unit stores the resistance value applied to the buried pipe connected to each channel in the initial setting step and the error correction function and the coefficient value for the buried pipe connected to each channel. In FIG. 1, the memory unit is illustrated as being provided as a separate apparatus from other constituent apparatuses. However, it is needless to say that the memory unit may be provided in the central processing unit without being provided as a separate constituent apparatus.

The communication network 50 may be implemented as a network providing a communication path for connecting the high-performance tracking device 30 and the central sensing device 60 to a network including an Internet network, a wired network, and a wireless communication network. The central sensing device 60 is a server device that receives notification of breakage / leakage from a plurality of high-performance tracking devices 30, and is implemented by a conventional computer device.

The number of channels (n in FIG. 1) that can be connected to one high-performance tracking device 30 is limited depending on the capacity, and the number of channels connected to each channel sequentially, one by one, The resistance of the tube device and the pulse signal are measured.

FIG. 2 is a view illustrating an embodiment of a buried pipe installed in one channel connected to a high-performance tracker according to an embodiment of the present invention. Referring to FIG. The buried pipe apparatus is connected to the high-strength detection apparatus 30 through the sensing lines 11a and 11b. The buried pipe apparatus comprises a discharge pipe 10 having sensing lines 11a and 11b wound in a spiral shape and embedded in the ground below the ground surface 100 and a discharge pipe 10 arranged along the longitudinal direction in which the discharge pipe 10 is installed. 20a, 20b, 20c having connection terminals for electrically connecting the sensing lines 11a, 11b wound on the ground surface 100 to the ground surface 100. Various sensors including leak sensors (13a, 13b, 13c) provided at a plurality of places are provided in the discharge pipe (10). Although the submerged pipe apparatus connected to one channel is shown as one submerged pipe in the drawing, this is only shown for the sake of convenience of explanation, and actually has a structure in which a plurality of submerged pipes are connected. A connection pipe may be provided at a portion where the buried pipes are mutually connected, and the sense lines provided at neighboring buried pipes are connected to be interconnected. Reference numeral 40 denotes a breakage / leakage position of the buried pipe 10, and it is an object of the present invention to find an accurate breakage / leakage position (x).

3 is an installation cross-sectional view of an inspection port installed in a buried pipe apparatus according to an embodiment of the present invention. The two lines of sensing lines 11a and 11b provided in the buried pipe 10 are connected to the inspection port exposure sensing lines 22a and 22b. The fixation band 15 is used to fix the inspecting port exposure detection lines 22a and 22b to the buried pipe 10 so as not to damage them. The inspection port 20a is provided with a sensing line protection pipe 21 at a lower portion thereof, and a sensing line protection pipe 23 is provided at an upper portion thereof. On the outer circumferential surface of the upper part of the sensing line protection pipe 23, an inspection port fixing concrete 25 formed of a concrete structure is installed. Therefore, the inspection port exposure sensing lines 22a and 22b are installed to be exposed on the inner space provided by the inspection port fixing concrete 25 through the sensing line protecting pipe 23. [ In the normal state, the inspection port fixing concrete 25 is kept closed by the inspection port steel 29. When the breakage / leakage position is to be manually and precisely checked, the inspection port steel 29 is opened, By using the exposure sensing lines 22a and 22b, a high-strength tracking device is connected and measured.

4 is a flowchart illustrating a process of initially setting a failure location detection system for a buried pipe according to the present invention. First, a buried pipe is physically buried in the ground, and an inspection port is installed for each channel (ST 410). After connecting a manual high-strength tracking device to each checkpoint installed for each channel, the length of the sensing line is measured (ST 420). The measured actual examples are shown in Table 1.

channel Checkpoint Sensing line length Measuring length

One CP1 865.1 865.1 CP2 2530.8 3326.8 CP3 2736.3 3662.7 CP4 4901.9 6695.7 CP5 6323.7 8721.1
2

CP1 1297.7 1297.7 CP2 2748.6 3610.2 CP3 4576.5 6118.4 CP4 5501.3 7314.8
3
CP1 1323.3 1815.6 CP2 2863.5 3631.2 CP3 4381.9 5761.6
4

CP1 2047.3 2644.7 CP2 3493.7 4701.6 CP3 4456.9 6045.0 CP4 6438.9 8679.2

Table 1 shows a total of four channels installed in one high-performance tracking device. In channel 1, five checkpoints are installed, channel 2 has four checkpoints, channel 3 has three checkpoints, channel 4 Has four check ports installed therein. Typically, four checkpoints per channel are installed. The sensing line length means the total length of the physical sensing lines installed in the actual buried pipe. Since each buried pipe is installed with a spirally wound sensing line at the factory, it is known how many M lines are installed in the buried pipe at the time of manufacture. The measurement length means the length of the sensing line measured at each inspection port. The detection line length of each inspection line is measured by installing a high-performance tracking device 30 at each inspection port, applying a pulse using the pulse signal measuring unit, and then using a pulse signal fed back. Both the sensing line length and the measurement length indicate the actual length and the measured length of the sensing line installed from the fixed point tracking device 30 to each check port. In channel 1, it can be seen that the length of the actual sensing line is 2736.3 m in the inspection port CP 3, whereas the measured length is 3662.7 m. In the inspection port CP 5, the actual sensing line length is 6323.7 m, As can be understood from this, it can be seen that there is an error as the length of the actual sensing line and the measured length become farther from the high-score tracking device 30. [

After inputting the sensing line length and the measured length data at each check port (ST 430), an optimal error correction function is selected and a coefficient value of the corresponding function is calculated (ST 440). There are several commercial programs that generate error correction functions. A typical example is CurveExpert. According to various installation operations of the applicant of the present application, the error correction function of the actual sensing line length and the length measured by the pulse signal measuring unit is usually derived in the form of a quadratic equation. Therefore, if the values for the three coefficients are obtained, the error correction function for each channel is specified.

Next, the steady-state intrinsic resistance value of each sensing line is measured (ST 450), a high-strength tracking device 30 is installed at the front of each channel, a pulse is applied using a pulse signal measuring unit, An initial pulse signal characteristic graph for a sensing line installed for each channel is calculated using a pulse signal (ST 460). When the error correction function, the coefficient, the normal time resistivity value, and the initial pulse signal characteristic graph are stored in the memory (ST 470), the initial setting is completed.

Next, a method for detecting whether breakage / leakage has occurred in the buried pipe apparatus set up according to the steps shown in FIG. 4 will be described using the flowchart shown in FIG. First, the error correction function, the coefficient, the steady state intrinsic resistance value and the initial pulse signal characteristic graph of the corresponding channel stored in ST 470 of FIG. 4 are read (ST 510), and the intrinsic resistance of the corresponding channel is measured (ST 520) . According to the applicant of the present application, it has been found that when a buried pipe constituting a channel is broken or leaked, the inherent resistance value of the channel increases. Therefore, if it is determined that the measured intrinsic resistance value is larger than the normal time resistivity value, it is determined that there is a possibility of occurrence of breakage / leakage, and a step of generating a state characteristic graph of the pulse waveform is proceeded. Otherwise, / STEP 530), and checks whether there is a next channel to detect breakage / leakage (ST 540). If there is no next channel to be inspected, the process is terminated. If the next channel remains, the process returns to step ST510. In ST 530, it is described that the measured value of the intrinsic resistance is directly compared with the measured value of the intrinsic resistance, but a certain margin may be set. For example, it may be determined whether the measured intrinsic resistance value is greater than or equal to a predetermined value or more than a normal intrinsic resistance value.

If it is determined that ST 530 is true, a current state characteristic graph is generated from a pulse signal that is fed back to a channel currently being examined and fed back (ST 550). The difference graph is obtained from the current state characteristic graph based on the stored normal time pulse signal 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). The calculated distance value is calculated using the initial error correction function and the coefficients (ST 590), and the calculated distance value is transmitted to the server (ST 600) and the next channel is checked.

6 is a graph showing a graph of a normal-time pulse signal characteristic and a current-state characteristic graph simultaneously measured using a pulse signal measuring unit in a high-performance tracking apparatus. WaveAnalyzer. The graph of the normal pulse signal characteristic is shown in blue, and the graph of the current state characteristic measured in the current state is shown in red. FIG. 7 shows an example of a difference graph of the two pulse signals shown in FIG. It can be seen that the maximum peak value occurs near the measurement length value of about 3,000 m.

While the preferred embodiments of the present invention have been described and illustrated above using specific terms, such terms are used only for the purpose of clarifying the invention, and it is to be understood that the embodiments of the invention and the described terminology are intended to cover various modifications, It is obvious that various changes and changes can be made without departing from the scope of the present invention. Such modified embodiments should not be understood individually from the spirit and scope of the present invention, but should be regarded as being within the scope of the claims of the present invention.

10: buried pipe 11a, 11b: sensing line
13a, 13b, 13c: leak sensor
15: Fixing band 20a: First check port
20b: second check port 20c: third check port
20d: fourth check port 21: sensing line shield base
22a, 22b: inspection port exposure detection line 23: detection line protection panel
30: Advantage tracking device 200a: Pulse signal applied
200b: Pulse signal to be fed back

Claims (8)

delete Wherein a plurality of the submerged pipes are connected to one another in a continuous manner in the ground, and a sensing line is installed to be electrically connected to the plurality of submerged pipes, wherein a length of the plurality of submerged pipes Wherein the inspection port is electrically connected to the sensing line at a plurality of points connected in the direction of the inspection line,
A pulse signal measuring unit for applying a pulse signal to the sensing line and measuring a damage position value using a feedback pulse signal;
A memory unit for storing an error correction function for correcting the measured length value of the signal line connected to the corresponding check point to the actual length value of the signal line connected to each check point by applying a pulse signal at each check port and using a feedback pulse signal,
A central processing unit for calculating a breakage position measured by the pulse signal measurement unit as an actual breakage position value using the error correction function;
A transmission / reception modem for transmitting the actual breakage position value to the outside,
And a resistance measuring unit for measuring the intrinsic resistance value of the plurality of buried pipes using the sensing line, wherein the memory further stores and stores an initial measured intrinsic resistance value at the time of embedding the plurality of buried pipes Wherein the tracking unit comprises:
3. The method of claim 2,
Wherein the central processing unit measures an intrinsic resistance value of a plurality of buried pipes connected to the one channel in the current state and uses the pulse signal measurement unit only when the measured intrinsic resistance value is greater than the steady- Wherein the position is measured.
The method according to claim 2 or 3,
Further comprising a multi-channel device for sequentially detecting failure locations of buried pipes connected to the respective channels.
Wherein a plurality of the submerged pipes are connected to one another in a continuous manner in the ground, and a sensing line is installed to be electrically connected to the plurality of submerged pipes, wherein a length of the plurality of submerged pipes The method comprising the steps of: detecting a damage position of a buried pipe having an inspection port provided in a plurality of locations connected to the inspection line in such a manner that the inspection port is exposed to the ground surface,
An error correction function for correcting the measurement length value to an actual length value of a signal line connected to each check port by applying a pulse signal at each check port and measuring a measurement length value of a signal line connected to the check port using a feedback pulse signal, And a second step
A second step of measuring an intrinsic resistance value of a buried pipe connected to each channel at the initial stage of embedding a buried pipe connected to each of the channels and measuring and measuring the resistivity value using the sense line;
A third step of measuring the intrinsic resistance value of a buried pipe connected to each channel by using the sensing line at any point in time of operating a buried pipe connected to each channel;
And a fourth step of comparing the resistivity measured in the second step with the resistivity measured in the third step.
6. The method of claim 5,
The method further includes a fifth step of applying a pulse signal to the signal line of the buried pipe connected to each channel and storing the characteristic graph of the pulse signal as an initial pulse signal characteristic graph, Wherein the failure location of the buried pipe is detected.
The method according to claim 6,
The fourth step is performed after the fourth step when the resistivity value measured in the third step is greater than the resistivity value measured in the second step and the buried pipe connected to each channel is operated Further comprising a sixth step of generating a current state characteristic graph by applying a pulse signal to a buried pipe connected to each channel at a certain point of time.
8. The method of claim 7,
A seventh step of generating a difference graph between the initial pulse signal characteristic graph and the current state characteristic graph,
Calculating a peak point of the difference graph and measuring a break point from the peak point;
Further comprising a ninth step of calculating the failure location measured in the eighth step as an actual failure location using the error correction function.

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