KR101876730B1 - Monitoring System for Leak Detection of Waterworks - Google Patents

Abstract

The present invention provides a monitoring system for the leak detection of waterworks to detect in real time a leak in a water pipe line buried underground by installing a pressure gauge, a flow meter, and a vibration sensor. The monitoring system for the leak detection of waterworks includes a plurality of digital pressure gauges installed at intervals in a water supply pipe and connected to a wireless transmission/reception part, a plurality of digital flow meters installed at both ends, the branching or the merging part of the water supply pipe and connected to the wireless transmission/reception part, a plurality of vibration sensors installed at intervals in the water supply pipe and sensing the vibration of the water supply pipe and connected to the wireless transmission/reception part, and a central control server which receives measurement values sensed by the digital pressure gauges, the digital flow meters, and the vibration sensors by wireless communication, analyzes the measurement values, and determines whether a leak is occurred, and outputs the result.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a leak detection system,

More particularly, the present invention relates to a water leak detection and monitoring apparatus, and more particularly, to a water leak detection and monitoring apparatus for a water leakage detection system, which detects a leakage of water from a water supply pipe embedded in an underground by installing a pressure gauge, a flow meter, The present invention relates to a water leakage detection and monitoring system that allows an operator to easily grasp a leakage position on a map.

Generally, most of the water supply pipelines are buried in the underground, and leaking water is more likely to occur in the case of the wastewater that has passed 10 years or more.

When leaks occur in the water supply pipeline, not only the fluctuation of the soil but also the contamination of the soil contaminate the soil and groundwater, causing the settlement of the ground and changes in the tributaries. Environmental problems, etc. occur below the surface and can not be easily grasped, so there is a serious problem that they do not recognize their importance.

In the past, portable equipment such as a blue food principle has been used to detect the leakage by circulating through the site. However, a skilled artisan has to be skilled in identifying leaks by paying close attention to the blue food detection method. It is very difficult to accurately identify the actual location of leaks because it is not productive and effective because it must be detected every time it moves along the underground pipeline.

In recent years, a technique has been developed and provided for detecting leakage of water from a water pipe using a device other than a sound device.

For example, Korean Patent Laid-Open Nos. 10-2003-0087242, 10-2013-0026561, 10-0504630, 10-0879399, 10-1563279, 10-1640894 , 10-1643311, etc. disclose various techniques for detecting the leakage of the water pipe.

The present invention provides a water leakage detection and monitoring system capable of detecting in real time where water leakage occurs in a water supply pipeline buried underground by installing a pressure gauge, a flow meter, and a vibration sensor in order to solve the above problems It has its purpose.

Further, according to the present invention, the topography is displayed using the API map based on the leakage occurrence position, so that the operator can easily grasp the leakage position on a map.

In addition, the present invention applies a VPN supplementing method to a central control unit, and provides ETOS and FEP servers to be compatible with various communication protocols.

In addition, the present invention analyzes the data received from the central control server 50 and configures a manager registration unit to register a mobile phone number by ranking the manager rank so that a leakage or a sink hole can be generated in advance to the manager.

The water leakage detection and monitoring system according to an embodiment of the present invention includes a plurality of digital flow meters installed on both ends of a water pipe, a plurality of digital flow meters installed in a branching or confluent portion and measuring a total amount of flowed in and flowed out amount in real time; A plurality of digital pressure gauges installed at a predetermined interval in the water pipe and measuring water pressure in the pipe in real time; a plurality of pressure gauges installed at a predetermined interval in the water pipe, sensing vibration of the water pipe, A remote terminal unit (RTU) for converting data measured by the digital pressure gauge, the digital flow meter, and the vibration sensor into a format that can transmit the measured values and transmitting the data to the central control server through wireless communication; And a central control server for receiving and analyzing data from the remote terminal unit (RTU) to determine whether or not a leak has occurred and a leakage position, and outputting the result to the display unit.

The central control server analyzes the signal received from the digital pressure gauge and judges that leakage occurs when the water pressure is instantaneously lowered under a steady water pressure and the lowered water pressure is maintained and analyzes the signal received from the digital flow meter, The leakage amount and the leakage point are determined by analyzing the flow amount difference flowing out from the total amount of the total flow amount flowing into the inlet port.

In the central control server, the leakage point predicted to leak when leakage is determined is displayed on a map in association with the API map base, and provided to a monitor (display unit).

A data log module for collecting and storing measured values transmitted through the plurality of digital pressure gauges, a plurality of digital flow meters, and a plurality of vibration transducers via a wireless transceiver, And transmits the collected data to the central control server for real-time monitoring and analysis.

The central control server 50 analyzes the received data and configures an administrator registration unit to register the mobile phone number by ranking the manager rank according to the manager rank so that leakage or sinkhole can be generated beforehand to the manager.

The central control server multiplies the arrival time delay DELTA t, which is the difference of the arrival time of the acoustic waves sensed by the vibration sensor made of the accelerometer positioned at both sides of the leak point, by the acoustic wave velocity c, and adds the distance D between the both accelerometers Next, divide by 2 to calculate the distance from the vibration sensor to the leak point.

As the vibration sensor, an acoustic emission sensor and an accelerometer may be used.

According to the water leakage detection and monitoring system according to the embodiment of the present invention, it is possible to detect leakage by transmitting and receiving measurement values through wireless communication, It is possible to significantly reduce the economic loss due to leakage.

In addition, according to the water leakage detection and monitoring system according to the embodiment of the present invention, it is possible to install a digital pressure gauge to detect the pressure that is changed at normal pressure and to check the leakage in real time, It is possible not only to confirm the leakage from the amount but also to check the leakage point by sensing the elastic wave generated at the time of leakage through the vibration sensor, It is possible.

In addition, according to the present invention, the topography is displayed using the API map based on the leakage occurrence position, so that the operator easily grasps the leakage position on the map, thereby improving the working efficiency.

In addition, the present invention applies the VPN complementary method to the central control unit and installs an ETOS and FEP server to enable compatibility of various communication protocols, thereby enabling real-time monitoring and analysis of communication data of different types.

In addition, the present invention enables time synchronization to each on-site remote terminal unit (RTU) by transmitting the current time in the LTE wireless manner in real time in the central control center, thereby minimizing the time error when an error occurs in the data value collected in the on-site RTU .

In addition, the present invention analyzes the data received from the central control server 50 to determine the ranking according to the manager rank when leak or sinkholes are generated, and informs the manager in advance of the cell phone number, thereby preventing leakage or sinkhole incidents do.

FIG. 1 is a schematic view of a water leakage detection and monitoring system according to an embodiment of the present invention.
FIG. 2 is a conceptual diagram for explaining a method of detecting a leak point by using arrival time delay in a water leakage detection and monitoring system according to an embodiment of the present invention. FIG.
FIG. 3 is a graph showing a signal of a vibration sensor and a cross-correlation function in a case where there is no arrival time delay in a water leakage detection and monitoring system according to an embodiment of the present invention.
FIG. 4 is a graph showing a signal of a vibration sensor and a cross-correlation function in a case where there is an arrival time delay in a water leakage detection and monitoring system according to an embodiment of the present invention.
5 is a graph showing a cross-correlation function according to a sign of arrival time delay in a water supply leak detection and monitoring system according to an embodiment of the present invention.
FIG. 6 is a graph illustrating a signal change of an acoustic emission sensor when leakage occurs in a water leakage detection and monitoring system according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of a water leakage detection and monitoring system according to the present invention will be described in detail with reference to the drawings.

The present invention can be embodied in various forms and is not limited to the embodiments described below.

Hereinafter, for the purpose of clearly illustrating the present invention, a detailed description of parts that are not closely related to the present invention is omitted, and the same or similar components are denoted by the same reference numerals throughout the entire description of the present invention, .

1, a water leakage detection and monitoring system according to an embodiment of the present invention includes a plurality of digital pressure gauges 10 installed in a water supply pipe 2, a plurality of digital flow meters 20, A vibration sensor 30 of the main control server 50, and a central control server 50.

The plurality of digital pressure gauges 10 are installed in the water pipe 2 at regular intervals.

Each of the digital pressure gauges 10 is provided with a remote terminal unit (RTU) to convert data in a form that can collect and transmit data from a remote place, transmit the converted data to the central control server 50 and monitor in real time, RTU) uses LTE wireless communication to synchronize GPS-based time.

When the digital pressure gauge 10 is installed as described above, when the water pressure and the leakage in the steady state are generated, the water pressure of the adjacent digital pressure gauge 10 is instantaneously decreased, thereby detecting the leakage and the leakage point in real time It is possible.

When leakage occurs, the water pressure is kept constant during the progress of the leakage, so that it is possible to detect the leakage by comparing with the normal water pressure.

The plurality of digital flow meters (20) are installed at both ends of the water pipe (2) and at a branching or merging part.

A remote terminal unit (RTU) is installed in each of the digital flow meters 20 to convert data in a form that can collect and transmit data from a remote site, transmit the converted data to the central control server 50 and monitor in real time, ) Uses LTE wireless communication to synchronize GPS-based time.

When the digital flow meter 20 is installed as described above, it is possible to confirm the total amount of the total flow amount and the real time flow rate.

In addition, if the leakage flow rate is compared with the flow rate flowing in the case where leakage occurs in the section where the digital flowmeter 20 is installed and the leakage flow rate is determined, it is determined that the leak is leaked when the difference exceeds the value set in the central control server, As shown in FIG.

When the digital flow meter 20 is installed, it is possible to macroscopically determine the leakage amount and the leakage point by subtracting the amount of water actually used and analyzing the difference between the digital flow meters 20.

The digital flow meter 20 is capable of macroscopically judging a leakage point on both ends of the pipe, and the digital pressure gauge 10 is capable of detecting a leak and an approximate leak point.

The plurality of vibration sensors (30) are installed at a predetermined interval in the water pipe (2).

Each of the vibration sensors 30 is connected to a wireless transmission / reception unit.

In the case where the vibration sensor 30 deviates from the basic vibration value of the pipe set in the central control server and deviates from the basic vibration value range, it is possible to detect the abnormal vibration to predict the leakage, and the vibration value of the water pipe 2 And transmits it to the central control server in real time.

When a plurality of digital pressure gauges 10, a plurality of digital flow meters 20, and a plurality of vibration sensors 30 are installed, a data logger module for receiving measurement values transmitted through a wireless transceiver unit and collecting and storing the measured values for a predetermined period It is also possible to arrange data in a predetermined distance or in a certain area so that data collected every predetermined period in the data log module is transmitted to the central control server 50 for provision.

The wireless transceiver installed in the digital pressure gauge 10, the plurality of digital flow meters 20 and the plurality of vibration sensors 30 is connected to the digital pressure gauge 10, the digital flow meter 30 and the vibration sensor 30, It is also possible to configure the memory unit to process the signal into a file and store it.

The wireless transceiver may be configured using a remote terminal unit (RTU) or the like.

The remote terminal unit (RTU) constituting the wireless transceiver unit may be configured to synchronize time based on the GPS system using wireless communication.

In addition, time synchronization can be achieved by transmitting the current time in real time using the wireless communication between the data log module and the central control server 50 and the remote terminal unit (RTU) constituting the wireless transmission / reception unit, thereby minimizing the time error .

The plurality of digital pressure gauges 10, the digital flow meter 20 and the vibration sensor 30 transmit the measured values to the data (for example, 30 seconds, 1 minute, and 3 minutes) To the log module or the central control server (50).

The digital pressure gauge 10, the digital flow meter 20, and the vibration sensor 30 sequentially configure the plurality of digital pressure gauges 10, the digital flow meter 20, and the vibration sensor 30 to transmit stored data after synchronization detection by a call from the data log module.

The number of the connection module (each digital pressure gauge 10, the digital flow meter 10, the digital flow meter 20, the vibration sensor 30, and the data log module or the central control server 50) 20, and the vibration sensor 30), and send and receive data when they are synchronized.

The data log module may be installed in a fixed state in each predetermined area and may be configured to transmit and receive data to and from the plurality of digital pressure gauges 10, the digital flow meter 20, and the vibration sensor 30, A digital flow meter 20, and a vibration sensor 30 in a state of being carried by a user while walking on a walk or a vehicle while being carried by a user, and is configured to collect data by wirelessly transmitting and receiving the digital pressure gauge 10, the digital flow meter 20, It is also possible to do.

The central control server 50 receives the measured values sensed by the digital pressure gauge 10, the digital flow meter 20 and the vibration sensor 30 by wireless communication, analyzes the measurement values, And outputs it to the control unit.

The central control server 50 is preferably configured to analyze the received data and to transmit a leakage alarm to a related authority, a control center, or an administrator.

The central control server 50 analyzes the received data and configures an administrator registration unit to register a mobile phone number by ranking the manager rank so that a leak or a sink hole can be generated in advance to the manager.

Analyzes the data received from the central control server 50, and determines the order of the manager rank when the leak or sink hole can be generated, and notifies the manager of the rank in advance with the mobile phone number.

In this way, it is possible to reduce leakage or sinkhole accidents to a minimum by preventing double leakage or sinkhole accidents by double checking with the display unit and the manager's mobile phone about the possibility of leakage or sinkholes.

In this case, the rank of the manager class is classified into the first and second rank according to the rank of the responsibility scope, and the manager informs the manager of the abnormal symptom information sequentially by the messenger in accordance with the priority registered in the manager registration part .

The central control server 50 may be configured to monitor the leakage point in a map on the map in association with the API map based on a point that is predicted to leak when leakage is detected.

For example, in the central control server 50, the measurement values (instantaneous value, difference value, enlargement value, etc.) for each measurement point are stored in the sensor position map (or the on-screen pipe map showing the sensor position on the water pipe map) It is also possible to display the state after analysis of the leak symptom judgment by software on a monitor (display unit).

It is also possible that the user confirms the leak alarm and then clicks the cursor on the flashing color display lamp to confirm the correct point.

The central control server 50 can display a leakage point on a map on which a terrain is represented by using a map application program interface (API) and provide it to a monitor (display unit). Thus, It is possible to easily and accurately check the leak point and quickly respond to the leak by receiving information on the leak point.

The map application interface used by the central control server 50 may be a Google map, a Daum map, a Naver map, or the like.

Generally, a longitudinal wave propagating through a fluid occurs as fluid in a pipe is discharged. In general, a fluid in a free space has a non-dispersive property with a constant propagation velocity regardless of the frequency, When the fluid propagates through the inside of the limited pipe, the longitudinal wave propagates and affects the out-of-plane direction of the pipe, so that the fluid and the pipe exhibit a coupled response, and the coupled wave exhibits a dispersive characteristic Respectively.

Therefore, when this signal is measured using the vibration sensor 30 such as an accelerometer, the vibration of the water pipe 2 due to the longitudinal wave of the fluid can be grasped, and it is possible to detect whether or not the water pipe 2 leaks .

The vibration sensor 30 may be constructed using an acoustic emission sensor and an accelerometer.

In this case, the acoustic emission sensor exhibits excellent performance in a high-frequency region with a relatively short wavelength, and the accelerometer exhibits excellent performance in a low-frequency region with a relatively long wavelength.

When the vibration sensor 30 is constructed by using the acoustic emission sensor and the accelerometer together, it is possible to effectively detect the acoustic wave even in a long distance and in a system with a large attenuation, which is limited in the use of the acoustic emission sensor.

The vibration sensor 30 senses seismic waves generated when leakage occurs in the water pipe 2 and propagated in both directions.

In the case where the acceleration sensor is used as the vibration sensor 30, it is preferable that an arrival time delay, which is the difference of the acoustic wave arrival times sensed by the vibration sensor 30 formed by the accelerometers located on both sides of the leakage point, The distance from the vibration sensor 30 to the water leakage point is calculated.

For example, as shown in Fig. 2, when water leakage occurs at a water leakage point (indicated by a triangle) of the water supply pipe 2 in which the vibration sensor 30 composed of an accelerometer is installed on both sides, And the elastic waves propagate in both directions from the water leakage point and sense the elastic waves propagated in the vibration sensors 30 on both sides.

As shown in the following Equations (1) and (2), the central control server 50 uses the arrival time delay? T indicating the difference in arrival time of seismic waves sensed by both vibration sensors 30, It is possible to configure it to confirm.

In Equations (1) and (2), t ₂ indicates a relatively longer acoustic wave arrival time in both vibration sensors 30, t ₁ indicates a relatively shorter acoustic wave arrival time in both vibration sensors 30 And Δt represents an arrival time delay which is a value obtained by subtracting (t ₂ -t ₁ ) a shorter acoustic wave arrival time t ₁ from a relatively longer acoustic wave arrival time t ₂ , and D represents an arrival time delay between the two vibration sensors 30 D ₁ represents the distance from the vibration sensor 30 where the relatively shorter acoustic wave arrival time is detected to the water leakage point and d ₂ represents the vibration sensor 30 in which a relatively longer acoustic wave arrival time is detected, To the water leakage point.

As described above, the vibration sensor 30 located near the leakage point senses the leakage signal before the vibration sensor 30 located at a remote location. However, the signal sensed by the vibration sensors 30 is continuous and random (2) and the water therein are transmitted as a transmission medium while being exposed to complicated physical processes and various kinds of noise, and the water in the water pipe (2) Since uncertain factors may intervene by discontinuous points (valves, branches, etc.) and due to various ambient noises and vibrations at the time of measurement, simply comparing the waveforms in the time domain, It is very difficult to analyze the arrival time delay that represents the difference.

Therefore, it is not a simple matter to accurately determine the leak point by signals obtained from only two vibration sensors 30 in a state in which the actual situation of the water pipe 2 embedded in the underground is unknown, (2) is exposed to various noises such as ambient noise, various noise sources due to a complicated pipe network, and it is often impossible to simply determine which vibration wave is caused by leakage.

The distances d ₁ and d ₂ from the vibration sensor 30 to the water leakage point can be obtained by finding the velocity c of the elastic wave and the arrival time delay Δt It can be estimated.

For example, a signal x (t), y (t) including a leakage signal and noise sensed by the two vibration sensors 30 can be given by Equation 3 below. Here, x (t) denotes a signal sensed from one vibration sensor 30, and y (t) denotes a signal sensed from the other vibration sensor 30.

In Equation (3), s (t) is a stationary random signal whose mean value is zero (0) and whose statistical characteristic value does not change with time, and can be assumed as white noise denotes a pure water leakage signal, α represents the noise as measured at a relative amplitude factor (amplitude factor) it represents, n _x (t) and _y n (t) are each of the vibration sensors 30.

In the ideal case of Equation (3), s (t) and y (t) of the noise-free simple waveform are signals delayed by time? T compared with x (t).

However, since it is very difficult to know the arrival time delay? T when a continuous random signal is simply compared with the waveform in the time domain, the cross-correlation function (R _xy ( τ)).

In Equation (4), E [x (t) y (t-tau)] is an ensemble average of products of two signals x (t) and y .

When the two signals x (t) and y (t) are related to each other and the arrival time delay is not present, the cross correlation function (R _xy (τ)) has symmetry, the peak value appears at τ = 0, Shows a graph of such a typical cross-correlation function.

In FIG. 4, the cross-correlation function when there is an arrival time delay between the two signals x (t) and y (t) is represented by a graph, and it can be confirmed that the peak value appears at intervals of the arrival time delay.

In FIGS. 3 and 4, signals on x (t) and y (t), which are signals sensed by the two vibration sensors 30, are shown on the left and graphs are shown on the right.

Using the characteristics of the cross-correlation function indicating the degree of time delay as described above, signals detected through the two vibration sensors 30 at two points remote from the water leakage point are signals generated due to water leakage, It is possible to estimate the arrival time delay DELTA t.

If noise n _x (t) and n _y (t) are not related to each other, Equation (4) can be expressed by Equation (6).

As shown in Fig. 4, the cross-correlation function is represented by an auto-correlation function of the x (t) signal having the arrival time delay DELTA t, which is a time difference.

Since the signals sensed through the actual vibration sensor 30 are x (n) and y (n) composed of a finite number of digitized discrete signals, the cross-correlation function is expressed by the following Equation (7) Can be expressed together.

In Equation (7), N represents the total number of the measured discrete signals, and k represents the number of arrival time delays of the discrete signal.

The arrival delay Δt = k · Δ, where Δ is the sampling interval, Δ = 1 / f _s , and f _s is the sampling frequency.

In an embodiment of the present invention, a signal detected by the vibration sensor 30 for a limited time (actually, a very short time) is calculated by using a graph of an arrival time difference method).

The position of the peak of the cross-correlation function is different according to the sign (+ or -) of the arrival time delay Δt.

For example, as shown in Fig. 5, when d1 > d2, the peak value of the cross-correlation function appears on the (+) side of the time axis and d1 < d2 appears on the (-) side.

In the embodiment of the present invention, the central control server 50 receives a signal generated due to the leakage from the two vibration sensors 30 in the same manner as described above, calculates a cross-correlation function, Δt), and it is possible to confirm the leak point by using the above-mentioned equations (1) and (2).

In addition, the central control server 50 may estimate the arrival time delay? T of signals sensed by the two vibration sensors 30 through the following procedure.

For example, the central control server 50 uses the sensing signals x (t) and y (t) received from both vibration sensors 30 to calculate the auto spectral density S _xx (f) and S _yy (f), a coherence function γ ² _xy (f), and selects a frequency band having a high coherence function and a large magnetic spectrum density associated with the leak sound, (T) and y (t) are filtered using a band-pass filter corresponding to the frequency band and then the mutual spectral density (S _xy (f)) is calculated, and the inverse Fourier transform of the mutual spectral density It is also possible to calculate the arrival time delay? T used in Equations (1) and (2) by obtaining the cross-correlation function (R _xy

를 역푸리에변환을 통해 상호상관함수(R_xy(τ))를 구하여 상기 수학식 1 및 수학식 2에서 사용하는 도착시간지연(Δt)을 추정하도록 구성하는 것도 가능하다.The mutual spectral density (s) covering a specific window function of the frequency band set to advantageously calculate the arrival time delay? T to the mutual spectral density (S _xy (f)

It is also possible to obtain the cross correlation function (R _xy (?)) Through inverse Fourier transform and estimate the arrival time delay? T used in Equations (1) and (2).

를 구하고, 이

로부터 역푸리에변환을 통해 상호상관함수(R_xy(τ))를 구하여 상기 수학식 1 및 수학식 2에서 사용하는 도착시간지연(Δt)을 추정하도록 구성하는 것도 가능하다.For example, a window function in the appropriate frequency domain which is advantageous for calculating the arrival time delay DELTA t is obtained, and the window function is multiplied by the mutual spectral density S _xy (f) obtained as described above

, And

It is also possible to obtain the cross-correlation function (R _xy (?)) Through inverse Fourier transform from the arrival time delay? T to estimate the arrival time delay? T used in Equations (1) and (2).

The following Equation (8) is used to calculate the arrival time delay between two sensed leak signals x (t) and y (t) as an optimal Maximum Likelihood window as an example of the window function Window function W _ML (f).

를 만족해야 하며, 최적 Maximum Likelihood 창에서는 다음의 수학식 9와 같이 두 신호 사이의 코히어런스함수 크기의 제곱으로 사용된다.In Equation (8),? ² _xy (f) is a coherence function

In the optimal Maximum Likelihood window, it is used as the square of the coherence function size between the two signals as shown in Equation (9).

가 얻어지고, 이로부터 역푸리에변환을 통해 수학식 11과 같이 개선된 상호상관함수를 구하는 것이 가능하다.The mutual spectral density (S _xy (f)) is then multiplied by the window function WML (f) to obtain an improved inter-spectral density

And it is possible to obtain an improved cross-correlation function as shown in Equation (11) through the inverse Fourier transform.

6, when the acoustic sensor is used as the vibration sensor 30, it is possible to detect the position accurately because a peak value is generated at the leak point.

For example, as shown in FIG. 6, when a leak occurs, many acoustic emission signals appear throughout the entire range, but the peak values of more acoustic emission signals appear more intensively as mountains over time It is possible to accurately detect the leak point when a leak occurs.

As described above, when the vibration sensor 30 is constructed by using the acoustic emission sensor, the leakage of water by a large amount of water causes the water pipe 2 to increase its force, It is necessary to accurately analyze the peak value when the peak value occurs in several places because there is a case where the positional expression error of the periphery due to the velocity difference is caused by inducing another acoustic wave.

In addition, although the acoustic emission sensor exhibits superior seismic sensing performance in the high frequency region where the wavelength is relatively shorter than that of the accelerometer, there is a limit to use in an environment with a long distance and a large attenuation. It is preferable that the vibration sensor 30 is provided.

 Since the acoustic emission sensor and the signal from the accelerometer constituting the vibration sensor 30 are electrical signals having a very weak voltage, an amplifier and a preamplifier are additionally installed to amplify the signal to a level at which analysis can be performed, (50).

As the acoustic emission sensor constituting the vibration sensor 30, it is possible to use a wide band type, but in terms of sensitivity, it is more preferable to use a resonance type sensitive to a specific frequency.

Although the preferred embodiments of the water supply leak detection and monitoring system according to the present invention have been described above, the present invention is not limited thereto, and can be variously modified and embodied within the scope of the claims, the description of the invention and the accompanying drawings , Which are also within the scope of the present invention.

2 - water pipe, 10 - digital pressure gauge, 20 - digital flow meter, 30 - vibration sensor
50 - Central control server

Claims (9)

A plurality of digital flow meters installed at both ends of the water supply pipe and at the branching or merging portion and measuring in real time the total amount of flowed in and flowed out;
A plurality of digital pressure gauges installed in the water pipe at regular intervals and measuring water pressure in the pipe in real time,
A plurality of vibration sensors installed at a predetermined interval in the water supply pipe and sensing vibration of the water supply pipe and connected to the wireless transmission / reception unit;
A remote terminal unit (RTU) for converting the measured values sensed by the digital pressure gauge, the digital flow meter, and the vibration sensor into a format that can transmit the data, and then transmitting the data to the central control server through wireless communication;
And a central control server for receiving and analyzing data from the remote terminal unit (RTU) to determine whether a leak has occurred and a leakage position, and outputting the result to a display unit,
A data log module for collecting and storing measured values transmitted through the plurality of digital pressure gauges, the plurality of digital flow meters, and the wireless transceivers of the plurality of vibration sensors for a predetermined period of time, And transmits the collected data to the central control server for real time monitoring and analysis,
The central control server multiplies the arrival time delay DELTA t, which is the difference of the arrival time of the acoustic waves sensed by the vibration sensor made of the accelerometer positioned at both sides of the leak point, by the acoustic wave velocity c, and adds the distance D between the both accelerometers Next, the distance from the vibration sensor to the water leakage point is divided by 2,
A point where a signal peak value of the vibration sensor composed of an acoustic emission sensor appears intensively as a mountain is determined as a leakage point,
Further comprising a manager registration unit for analyzing the received data and registering a cell phone number by ranking an administrator rank so that a leak or a sink hole can be generated in advance to the manager. The method according to claim 1,
Wherein the water leakage point is predicted to be leaked when the central control server judges that a leak has occurred, is displayed on a map in association with the API map base and is provided to a monitor (display unit). The method according to claim 1,
The central control server analyzes the signal received from the digital pressure gauge and judges that leakage occurs when the water pressure is instantaneously lowered under a steady water pressure and the lowered water pressure is maintained and analyzes the signal received from the digital flow meter, The water leakage amount and the water leakage point are determined by analyzing the flow amount difference flowing out from the total amount of the total flow amount flowing into the water leakage detection and monitoring system. delete delete The method according to claim 1,
Wherein the vibration sensor comprises an acoustic emission sensor and an accelerometer. delete The method according to claim 1,
In the central control server, the arrival time delay? T is obtained by using a characteristic of a cross-correlation function for two sensing signals x (t) and y (t) obtained from an accelerometer as vibration sensors, system.


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