KR101778775B1 - Monitoring system for underground water inflow in underground facilities - Google Patents

Monitoring system for underground water inflow in underground facilities Download PDF

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KR101778775B1
KR101778775B1 KR1020150173461A KR20150173461A KR101778775B1 KR 101778775 B1 KR101778775 B1 KR 101778775B1 KR 1020150173461 A KR1020150173461 A KR 1020150173461A KR 20150173461 A KR20150173461 A KR 20150173461A KR 101778775 B1 KR101778775 B1 KR 101778775B1
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South Korea
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signal
groundwater
power line
unit
detected
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KR1020150173461A
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Korean (ko)
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KR20170067057A (en
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김현식
김민호
정성욱
손경락
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(주)매트론
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/40—Investigating fluid-tightness of structures by using electric means, e.g. by observing electric discharges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/06—Electricity, gas or water supply

Abstract

The present invention relates to a groundwater inflow monitoring system for an underground facility to monitor the inflow of groundwater around a power line and a signal coupling unit by providing a signal coupling unit in a non-contact manner to a power line in an underground facility in which a power line is constructed.
The groundwater inflow monitoring system according to the present invention comprises: a power line constructed in an underground facility for power transmission; A signal generator for generating a signal having a predetermined frequency and magnitude; A first signal coupler connected to a part of the power line in a non-contact manner and receiving a signal generated by the signal generator and transmitting the signal to the power line; A second signal coupling unit coupled to another portion of the power line in a non-contact manner and collecting signals transmitted through the power line and delivering the signal to the outside; A signal detector for detecting a signal collected by the second signal combiner; A storage unit for storing a correlation between a predetermined groundwater and a detection signal; A controller for detecting information of groundwater flowing into the underground facility using the correlation between the signal detected by the signal detector and the storage unit; And a display unit for displaying the detected information.

Description

Background of the Invention [0002] Monitoring systems for underground water inflow in underground facilities

The present invention relates to a groundwater inflow monitoring system, and more particularly, to a groundwater inflow monitoring system, in which a signal coupling unit is installed in a non-contact manner to a power line in an underground facility in which a power line is installed, ≪ / RTI >

As urbanization progresses rapidly, the construction and utilization of underground facilities are increasing significantly. However, due to the development of underground facilities, ground subsidence occurs and the safety of underground facilities becomes an important concern due to the inflow of groundwater. Especially, in case of underground facilities such as subways in big cities, prevention of safety accidents is important because many people use them.

Since groundwater is a water resource that can be used more stably than surface water, water management and systematic development should be carried out. However, in case of entering underground facilities, there is risk of safety accident as well as financial loss. Is required.

Conventionally, techniques for preventing such inflow of groundwater have been proposed. For example, Patent No. 10-0271703 discloses a technique for installing a watertight plate to prevent the inflow of groundwater when constructing a concrete underground retaining wall, and as another example, Patent No. 10-1503034 discloses an inflow of upper ground contaminated groundwater Shielding apparatuses and methods for preventing interference are disclosed. However, in this conventional technique, it is difficult to install the groundwater shielding facilities on the walls of the underground facilities. In particular, it is impossible to install it in a wide area such as an urban subway.

As a further example, the technology for monitoring and managing urban underground objects based on Internet (IoT) has been suggested (Articles: Electronics and Telecommunications Trends, Vol. 30, No. 5, Oct. 2015, pp. 28-38) . In this system, a sensor for detecting groundwater is installed at a lower position of the groundwater inflow area to detect groundwater inflow. However, even in this case, it is impossible to install it in a wide area such as an urban subway.

Patent Registration No. 10-0271703 Patent Registration No. 10-1503034

(IoT) -based urban underground monitoring and management system technology (Electronics and Telecommunications Trends, Vol. 30, No. 5, Oct. 2015, pp. 28-38)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a signal coupling unit in a non-contact manner to a power line constructed in an underground facility, The purpose of the system is to provide.

It is another object of the present invention to provide a groundwater inflow monitoring system for monitoring the inflow of groundwater around a power line even when a power line is installed in a large area such as an urban subway.

A groundwater inflow monitoring system for an underground facility according to an embodiment of the present invention includes: a power line constructed in an underground facility for power transmission; A signal generator for generating a signal having a predetermined frequency and magnitude; A first signal coupler connected to a part of the power line in a non-contact manner and receiving a signal generated by the signal generator and transmitting the signal to the power line; A second signal coupling unit coupled to another portion of the power line in a non-contact manner and collecting signals transmitted through the power line and delivering the signal to the outside; A signal detector for detecting a detection signal collected by the second signal combiner; A storage unit for storing a correlation between groundwater information including the inflow of groundwater into the underground facility, the location of the groundwater and the amount of groundwater, and the detection signal detected by the signal detector; A controller for detecting information of groundwater flowing into the underground facility using the correlation between the signal detected by the signal detector and the storage unit; And a display unit for displaying the detected information.

In the present invention, the power line and the first and second signal coupling units are installed at locations where groundwater flows into the underground facility.

In the present invention, the control unit detects the position of the introduced groundwater by dividing the groundwater into a position where the power line is installed and a case where the groundwater flows into a position where the first and second signal combining units are installed.

The controller may further include an impedance varying unit for adjusting an offset of a signal detected by the signal detecting unit by varying an internal impedance of at least one of the first signal combining unit and the second signal combining unit, When the amount of groundwater is introduced to a predetermined threshold value or more and the signal detected by the signal detection unit exceeds a detectable maximum value, the impedance variable unit is controlled to adjust the internal impedance and adjust the offset of the detection signal in the signal detection unit So that the detection signal is smaller than the maximum value.

In the present invention, when the offset of the detection signal is adjusted so that the detected signal becomes smaller than the maximum value, the control unit detects the position and amount of the groundwater from the correlation signal and the detection signal in consideration of the adjusted offset .

In the present invention, the coil connected to the impedance variable portion is wound on the inner surface and the outer surface in the longitudinal direction of the first and second signal coupling portions, in which the hollow portion is formed.

In the present invention, the storage unit stores a correlation between detection signals according to the amount and position of the introduced groundwater, and the controller calculates a correlation between the amount of the introduced groundwater and the position .

According to the present invention, since a non-contact type signal coupling unit capable of communication in a non-contact manner is connected to a power line already built in an underground facility or a power line to be additionally constructed, an additional communication line for communication is not needed, .

Also, according to the present invention, groundwater inflow monitoring can be performed in real time even for a wide range of underground facilities such as an urban subway.

In addition, according to the present invention, since the magnitude of the detection signal varies depending on the position and amount of the introduced ground water, it is possible to accurately detect not only the inflow of the ground water but also the position and amount of the inflowed ground water.

1 is a schematic configuration diagram of a groundwater inflow / outflow monitoring system for an underground facility according to an embodiment of the present invention;
2 is an outline view of first and second signal combining units according to an embodiment of the present invention,
FIG. 3 is a graph illustrating detection of a detection signal before and after groundwater inflow according to an embodiment of the present invention. FIG.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals whenever possible, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

1 is a schematic block diagram of a groundwater inflow monitoring system for an underground facility according to an embodiment of the present invention.

1, a groundwater inflow monitoring system 100 for an underground facility according to an embodiment of the present invention includes a power line 110, a signal generator 120, a first signal coupler 130, A signal detection unit 150, a storage unit 160, a control unit 170, and a display unit 180. [0031] Here, in another embodiment of the present invention, the groundwater inflow monitoring system 100 may further include an impedance variable unit 190 additionally.

The power line 110 is constructed to transmit power in an underground facility (not shown). The power line 110 may be installed in an underground facility or may be installed in an additional facility. In this embodiment, the power line 110 functions not only as a power transmission but also as a communication line such as a power line communication (PLC). Preferably, in order to monitor the inflow of groundwater into the underground facility, the power line 110 is preferably installed in an area where groundwater inflow is expected.

The signal generator 120 generates a specific signal having a preset frequency and magnitude. This signal is a reference signal for determining whether groundwater has been introduced into an underground facility or the amount of groundwater that has flowed into the underground facility. Such a signal is preferably an analog signal having a certain type of waveform as an electrical signal, and this analog signal has a predetermined frequency and magnitude. In this embodiment, the signal generator 120 may be implemented as a local oscillator, for example.

The first signal coupling unit 130 and the second signal coupling unit 140 are installed at a portion different from the power line 110, respectively. For example, the first signal coupling unit 130 and the second signal coupling unit 140 may be installed at both ends of the power line 110 installed in an area where groundwater is expected to flow from underground facilities. The first signal coupler 130 installed in a part of the power line 110 transmits the signal transmitted from the signal generator 120 to the power line 110 in a non-contact manner. As a result, these signals are transmitted (propagated) along the power line 110. At this time, the signal transmitted along the power line 110 is collected by the second signal coupler 130, which is coupled to the other part of the power line 110 in a non-contact manner, and is transmitted to the signal detector 150 at the subsequent stage. Preferably, the first signal coupling unit 130 and the second signal coupling unit 140 are installed in an area where groundwater inflow is expected in order to monitor the inflow of groundwater into the underground facility, as in the present invention.

The first signal coupling unit 130 and the second signal coupling unit 140 according to the embodiment of the present invention are coupled to the power line 110 in a non-contact manner. The first and second signal couplers 130 and 140 are formed in a cylindrical shape having an internal hollow portion so that the power line 110 is inserted into the hollow portion of the inner portion so that the first and second signal couplers 130 and 140 are connected to the power line 110, In an enclosing manner. The first and second signal combiners 130 and 140 transmit a specific signal to the power line 110 using an electromagnetic induction principle when a current is applied to a coil (not shown) Coupled and collected signal to be transmitted.

The signal detector 150 detects the signal collected by the second signal combiner 140. The signal thus detected is affected by the groundwater flowing into the underground facility. That is, the detected signal is detected differently depending on whether groundwater is introduced or not.

The storage unit 160 stores the correlation between the groundwater and the detection signal in advance. This correlation is then used as information for determining groundwater inflow through the relationship with the groundwater when the signal is actually detected by the signal detector 150. [ Specifically, the storage unit 160 stores information such as whether or not the groundwater flows (existence), the location of the groundwater, and the amount of the groundwater, and stores the correlation with the detection signal.

The control unit 170 detects information related to the groundwater introduced into the underground facility using the correlation between the signal detected by the signal detector 150 and the groundwater and the detection signal stored in the storage unit 160. In particular, the signal detector 150 detects the presence or absence of groundwater (inflow) and information on the location and amount of the groundwater. In particular, the control unit 170 divides the groundwater flow into the position where the power line is installed and the case where the groundwater flows into the position where the first and second signal coupling units 130 and 140 are installed, do. At this time, the controller 170 compares the signal generated by the signal generator 120 with the signal detected by the signal detector 150 and inputs the signal to the power line 110 and the first and second signal combiner 130 and 140 If there is any groundwater, and if there is groundwater, analyze the location and amount. Of course, the signal generated by the signal generator 120 and the signal detected by the signal detector 150 are not directly compared with each other, but a signal is transmitted through the power line 110, The signals are transmitted and collected through the units 130 and 140, and the signals are different depending on the amount of ground water or the amount and location of the ground water. For this, the controller 170 may include a wave analyzer, for example.

The display unit 180 displays the groundwater-related information detected by the control unit 170. As a result, the administrator (user) can visually easily confirm various information displayed on the display unit 180.

Meanwhile, in another embodiment of the present invention, the groundwater inflow monitoring system 100 may further include an impedance variable unit 190 selectively. The impedance variable unit 190 varies an internal impedance of at least one of the first signal coupler 130 and / or the second signal coupler 140 to offset an offset of a signal detected by the signal detector 150, . This is because the control unit 170 controls the impedance variable unit 190 when the amount of groundwater flowing into the underground facilities exceeds a predetermined threshold value and the signal detected by the signal detection unit 150 exceeds a detectable maximum value The internal impedance of the first signal coupling unit 130 and / or the second signal coupling unit 140 may be varied to adjust the offset of the detection signal detected by the signal detection unit 150, . This is to adjust the offset of the detected signal so that the detected signal falls within the detectable range when the introduced groundwater is too much and is out of the range of the signal detectable by the signal detector 150. [ At this time, when the offset of the detected signal is adjusted and the detected signal becomes smaller than the maximum value and falls within the detectable range, the controller 170 controls the signal detected by the signal detector 150, To detect the location and amount of groundwater from the correlations stored in the database 180. This is because the location and amount of the groundwater are different even if the same detection signal is applied when the offset is applied and when it is not applied. Therefore, when the offset is applied, the groundwater related information should be extracted in consideration of the applied offset.

2 is a schematic diagram of first and second signal combiners according to an embodiment of the present invention.

Referring to FIG. 2, the first and second signal couplers 130 and 140 may be formed as a cylindrical shape having a hollow portion therein. The power line 110 is inserted into the hollow portion. That is, a part of the power line 110 is installed so as to surround the cylindrical first and second signal coupling parts 130 and 140. The first and second signal couplers 130 and 140 according to the present invention can be coupled in a non-contact manner even when the power line 110 is already installed in an underground facility. This is accomplished by dividing the first and second signal coupling parts 130 and 140 into two parts like the separation line 20 as shown in the figure, connecting them to the power line 110 in a non-contact manner,

The characteristics of a signal to be transmitted are different depending on whether the ground line is present or not in the vicinity of the power line 110 and the first and second signal combiners 130 and 140. Also, the characteristics of the signal vary depending on the amount of groundwater. This will be described with reference to FIG. In the cylindrical signal coupling parts 130 and 140 having a hollow part therein, the magnetic field B therein is proportional to the magnetic susceptibility Xm of the substance present therein. The Xm of the air is 3.6 × 10 -6, but the water is -9.035 × 10 -6 . When the groundwater exists in the signal coupling parts 130 and 140, the internal magnetic field B becomes smaller. This means that the coupling of signals becomes smaller and the signal detected by the signal detector 150 is attenuated. Such a change in the characteristics of the signal occurs on the power line 110 on a similar principle. Also, the characteristic of the attenuated signal is different when the groundwater flows into the power line 110 and the first and second signal coupling parts 130 and 140. That is, it is possible to detect whether the groundwater is introduced into the first and second signal coupling units 130 and 140.

3 is a diagram illustrating a connection relationship between an impedance variable unit and first and second signal coupling units according to an embodiment of the present invention.

3, the coil 30 connected to the impedance variable part 190 according to the present invention is wound around the first and second signal coupling parts 130 and 140. For example, the number of windings can be changed as well as the number of windings twice. In detail, the coil 30 connected to the impedance variable portion 190 is preferably wound on the inner and outer surfaces of the cylinder in the longitudinal direction of the first and second signal coupling portions 130 and 140 having hollow portions therein. A current is supplied to the coil 30 to influence a magnetic field of a magnetic body (not shown) provided in the first and second signal coupling parts 130 and 140 to transmit a signal to the power line 110, So as to change the characteristics of the signal. In this embodiment, the size of the detected signal is reduced. Preferably to reduce the overall ratio of the signal.

FIG. 4 is a graph showing a detection signal for a detection signal before and after groundwater inflow according to an embodiment of the present invention.

4 (a) is a spectrum analysis waveform of a signal detected by a signal detection unit before groundwater inflow in a state where power line communication is performed in the present invention, and FIG. 4 (b) Lt; / RTI > is a spectral analysis waveform for a signal detected in the < RTI ID = 0.0 > A different frequency band is used to distinguish between the detected signal and the signal used for power line communication. For example, in the present embodiment, since the band before 40 MHz is the power line communication bandwidth, in order to avoid frequency interference, 50 MHz higher than the frequency is generated in the signal generator in the present invention. The signal measured in Figure 4 (a) is 13.98 dBm and the signal measured in Figure 4 (b) is 19.02 dBm. Signal attenuation of about 5dB occurs due to flooding, which can be used to determine groundwater inflow.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

110: power line 120: signal generator
130: first signal combining unit 140: second signal combining unit
150: Signal detection unit 160:
170: control unit 180: display unit
190: Impedance variable section

Claims (7)

Power lines constructed in underground facilities for power transmission;
A signal generator for generating a signal having a predetermined frequency and magnitude;
A first signal coupler connected to a part of the power line in a non-contact manner and receiving a signal generated by the signal generator and transmitting the signal to the power line;
A second signal coupling unit coupled to another portion of the power line in a non-contact manner and collecting signals transmitted through the power line and delivering the signal to the outside;
A signal detector for detecting a detection signal collected by the second signal combiner;
A storage unit for storing a correlation between groundwater information including the inflow of groundwater into the underground facility, the location of the groundwater and the amount of groundwater, and the detection signal detected by the signal detector;
A controller for detecting information of groundwater flowing into the underground facility using the correlation between the signal detected by the signal detector and the storage unit; And
A display unit for displaying the detected information; The groundwater inflow monitoring system for underground facilities including The method according to claim 1,
Wherein the power line and the first and second signal coupling units are installed at a position where the groundwater flows into the underground facility. The method according to claim 1,
The control unit may further include a groundwater inflow monitoring unit configured to detect a position of the inflowing groundwater by dividing a case where the groundwater flows into a position where the power line is installed and a case where the groundwater flows into a location where the first and second signal combiner units are installed, system. The method according to claim 1,
Further comprising an impedance varying unit for adjusting an offset of a signal detected by the signal detecting unit by varying an internal impedance of at least one of the first signal combining unit and the second signal combining unit, When the signal detected by the signal detecting unit exceeds a detectable maximum value by controlling the impedance variable unit to adjust the internal impedance so as to adjust the offset of the detection signal in the signal detecting unit, The groundwater inflow monitoring system of the underground facility. 5. The method of claim 4,
Wherein the control unit adjusts the offset of the detection signal so that when the detected signal becomes smaller than the maximum value, the controller detects the position and amount of the groundwater from the correlation signal and the detection signal in consideration of the adjusted offset, Inflow monitoring system. 5. The method of claim 4,
Wherein the coil connected to the impedance variable portion is wound on the inner surface and the outer surface in the longitudinal direction of the first and second signal coupling portions in which the hollow portion is formed. The method according to claim 1,
Wherein the storage unit stores a correlation between detection signals depending on the amount and position of the introduced groundwater, and the controller detects the amount and the position of the introduced groundwater by using the correlation between the signal detected by the signal detection unit and the groundwater Groundwater inflow monitoring system of facilities.
KR1020150173461A 2015-12-07 2015-12-07 Monitoring system for underground water inflow in underground facilities KR101778775B1 (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200174571Y1 (en) 1999-10-11 2000-03-15 주식회사서창엔지니어링 Pipeline and Leak Detector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200174571Y1 (en) 1999-10-11 2000-03-15 주식회사서창엔지니어링 Pipeline and Leak Detector

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