KR101563279B1 - Method and System for detecting water leak location based on elastic wave velocity measured by section in pipe - Google Patents

Abstract

According to an embodiment of the present invention, disclosed is a method to detect leak locations based on an electric wave velocity measured by section in a pipe, comprising: a step of monitoring electric waves generated in a pipe; a step of determining electric waves estimated as a leak among the electric waves detected in the monitoring step; and a step of determining locations where the elastic waves estimated as the leak occur using the elastic wave velocity measured and stored by section. Thus, the present invention helps find more accurate leak locations.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to leak detection methods and leak detection systems based on seismic velocities measured in pipelines,

The present invention relates to a leaking position detection method and a leaking position detection system based on seismic velocities measured for each section in a pipe.

People living in Hyundai are supplied with living water necessary for their life through a water pipe line embedded in the ground.

Direct measurement, indirect measurement, flow measurement (total amount of flowmeter installed at water purification plant and main pipe branching point, comparison of the total amount of the plural users after one month, ), Or flow rate measurement, and the like.

For example, Korean Patent Laid-Open Publication No. 2005-0048328 (2005.05.24) (a thermal improvement leak detection apparatus and method with improved specificity of leakage position) and Korean Patent Laid-Open Publication No. 2013-0057181 2013.05.31) (position detection system of leakage point).

1 is a view for explaining a conventional leakage position detection system.

Referring to FIG. 1, in the conventional leak detection system, the sensors S1 and S2 sense the seismic waves estimated as leakage, the time at which the sensors sense the elastic waves, the length of the pipe, the sensors S1 and S2, The position of the leaked sound, and the difference in leak sound detection time. However, since the correlation method uses the time delay to estimate the leak position, it is necessary to know the leak sound velocity of the pipe accurately, and time synchronization between the sensors is very important.

However, as shown in FIG. 1, the place where the pipe L is buried is composed of various types of soil (moisture-free or little soil) or rocks. The velocity of the elastic wave in the soil R1 with low humidity and the moisture- There is a difference in the elastic wave velocity in the ridge (R3) and a difference in the elastic wave velocity in the rocky area (R4), the sandy area (R2), or the mud (R5) Even if piping of the same material is used, it may be varied depending on its dimensions, and even if it has the same dimensions, the acoustic wave velocity may vary greatly depending on the material of the piping. Therefore, in order to estimate the correct seismic velocity, the mechanical properties and dimensions of the piping material should be given exactly. At present, in order to know the elastic wave velocity in the pipe, a method of calculating the elastic wave velocity in the pipe by the calculation formula is manually inputted by inputting the data such as the material and the dimension of the pipe. However, since not only the difficulty of obtaining accurate data of the piping already installed but also the actual piping can have various discontinuities (such as flanges, connectors, valves, branch pipes, pipe diameters, etc.) Estimation of the seismic velocity with the piping system inevitably has a lot of errors. Therefore, the seismic velocity estimation based on the calculation method is used as reference data. In actual application, it is necessary to construct the piping-seismic velocity database (DB) based on many experiments on various actual piping.

According to an embodiment of the present invention, there is provided a leaking position detection method and a leaking position detection system based on seismic velocities measured for each section in a pipe that can detect the leaking position simply, economically, and accurately.

According to an embodiment of the present invention, there is provided a method of monitoring an object, comprising: monitoring elastic waves generated in a pipe; Determining a seismic wave that is estimated as a leakage water among the seismic waves sensed in the motoring step; And a step of determining a position where the elastic wave estimated by the leakage is generated by using the elastic wave velocity which is measured for each of the sections and stored in advance, thereby providing a leakage position detection method based on the elastic wave velocity measured for each section in the pipe.

According to another aspect of the present invention, there is provided an acoustic wave generating apparatus comprising: elastic wave generation and receivers for sensing an elastic wave generated in a pipe; A leakage position determining unit for determining the seismic wave estimated as the leakage water among the elastic waves generated by the generation of the elastic wave and the receivers and for determining the position where the elastic wave estimated as the leakage is generated using the elastic wave velocity measured for each of the intervals; A leak location detection system based on the seepage velocity measured in each section can be provided.

According to one or more embodiments of the present invention, it is possible to detect the leakage position simply, economically, and accurately.

In accordance with one or more embodiments of the present invention, an acoustic wave velocity in an accurate pipe is required to detect an accurate leak location, but the material, size, discontinuity (flange, connector, valve, , Velocity of flow, environment of pipelines, etc., it is possible to detect leakage position easily, economically and accurately by measuring the velocity of elastic wave in pipeline affected by pipeline, through the generation and reception of direct seismic waves, do.

1 is a view for explaining a conventional leakage position detection system.
FIGS. 2 and 3 are views for explaining a leakage position detection system based on seismic velocity measured for each section in a pipe according to an embodiment of the present invention.
4 is a view for explaining a leakage position detection method based on seismic velocity measured for each section in a pipe according to an embodiment of the present invention.
5 is a view for explaining a leakage position detection method based on seismic velocity measured for each section in a pipe according to another embodiment of the present invention.
FIG. 6 is a view for explaining a leakage position detection method based on seismic velocity measured for each section in a pipe according to another embodiment of the present invention.
7 is a view for explaining a method of measuring a forward acoustic wave velocity according to an embodiment of the present invention.
8 is a view for explaining a method of measuring a reverse acoustic wave velocity according to an embodiment of the present invention.
FIG. 9 is a view for explaining a method of determining a leakage position using a forward acoustic wave velocity by a leakage position determining unit (LLCP).
FIG. 10 is a diagram for explaining a method of determining a leakage position using a reverse acoustic wave velocity by a leakage position determining unit (LLCP).
Figs. 11 to 13 are diagrams for explaining the formulas used for verifying the candidate section and determining the leakage position using the acoustic wave velocity. Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

FIGS. 2 and 3 are views for explaining a leakage position detection system based on seismic velocity measured for each section in a pipe according to an embodiment of the present invention.

2 and 3, a leakage detection system according to an embodiment of the present invention includes a plurality of elastic wave generators and receivers AGS1 and AGS2 capable of generating and sensing elastic waves in a pipe L for detecting leakage, , The AGS 3 and the AGS 4 and the plurality of acoustic wave generators AGS 1, AGS 2, AGS 3 and AGS 4, determines the seismic wave estimated as a leak, (LLCP) for determining a leak position.

In the leaking position detection system based on the seismic velocity measured in each pipe in the piping according to the embodiment of the present invention, the plurality of elastic wave generators and receivers AGS1, AGS2, AGS3 and AGS4 are disposed at appropriate distances Can be spaced apart.

The leak detection system based on the acoustic wave velocity measured in each pipe in the piping according to the embodiment of the present invention detects the leaked acoustic wave velocity (hereinafter referred to as " acoustic wave velocity " And a storage unit (not shown) for storing a reference waveform. Meanwhile, the storage unit may be included in the leak position determining unit LLCP, or may be provided separately from the leak position determining unit LLP.

In the embodiments of the present invention, the 'interval' is arbitrarily divided for the purpose of explanation of the present invention in the pipe (L) to detect the leak. For example, in the example of FIG. 3, an area from the position where the elastic wave generation and receiver AGS1 is located to the place where the elastic wave generation and the receiver AGS2 are located is referred to as a 'one section' Section), and an area from the position where the elastic wave generation and receiver AGS2 is located to the place where the elastic wave generation and the receiver AGS3 are located is referred to as a 'one section' And a region from the place where the elastic wave generation and receiver AGS3 is located to the place where the elastic wave generation and the receiver AGS4 are located is referred to as a ' For convenience 'third section'). In this case, the elastic wave velocity corresponding to the first section (hereinafter, referred to as 'first section acoustic wave velocity') and the acoustic wave velocity (hereinafter referred to as the 'second section acoustic wave velocity' (Hereinafter referred to as a second section acoustic wave velocity), and an acoustic wave velocity corresponding to the third section (hereinafter referred to as a third section acoustic wave velocity).

According to the embodiment of the present invention, there may be one or two or more acoustic wave velocities corresponding to each section. .

In the present specification, when the acoustic velocity corresponding to the first section is two, one of the two is referred to as a 'first section forward direction elastic wave velocity' and the other one is referred to as a first section reverse direction elastic wave velocity ' It will be referred to as " first section acoustic wave velocity ". In the same manner, when the acoustic wave velocity corresponding to the second section is 2, one of the two acoustic wave velocities is referred to as a second section forward acoustic wave velocity 'and the other is referred to as a reverse acoustic wave velocity of the second section, The second section acoustic wave velocity ', and when the acoustic wave velocity corresponding to the third section is 2, one of the two acoustic waves is referred to as a' third section forward acoustic wave velocity ', and the other' third section acoustic wave velocity ' Velocity, " and they are collectively referred to as the " third section acoustic wave velocity. &Quot;

Alternatively, in embodiments of the present invention, the area from the location of the acoustic wave generator and receiver AGS1 to the location where the acoustic wave generator and the receiver AGS3 are located may be viewed as one section, (AGS3) to the location where the elastic wave generation and the receiver (AGS4) are located can be regarded as one section. That is, in the embodiments of the present invention, the 'interval' may be defined as an arbitrary region between the acoustic wave generation and receiver AGSs.

The seismic velocity for each section stored in the storage unit (not shown) may be measured by artificially generating seismic waves for each section. A method of measuring the acoustic wave velocity of each section stored in the storage unit (not shown) will be described with reference to FIGS. 7 and 8. FIG.

7 is a view for explaining a method of measuring a forward acoustic wave velocity according to an embodiment of the present invention. Referring to FIG. 7, a description will be made of a method for measuring the velocity of the forward elastic wave in the first section, the second section, and the third section.

In the present specification, for the purpose of explanation of the present invention, when a direction in a pipe is defined as a forward direction, a direction opposite to the forward direction is defined as a reverse direction.

The method of measuring the forward acoustic wave velocity according to an embodiment of the present invention includes generating an acoustic wave located at a starting point of a first section and artificially generating an acoustic wave in a receiver AGS1.

The elastic waves artificially generated by the AGS 1 are mainly moved along the pipe L. Here, it is assumed that the water flowing in the pipe L flows in the second section and the third section from the start point of the first section through the end point of the first section.

The elastic wave traveling along the pipe L is generated at the end point of the first section (also the starting point of the second section in this embodiment) and the receiver AGS2, the end point of the second section The elastic wave generation and receiver AGS3 located at the start point of the third section in the example), and the elastic wave generation and receiver AGS4 located at the end of the third section.

(Length of the first section, length of the second section, length of the third section) and the lengths of the AGS2, AGS3, and AGS4, AGS2, AGS3, and AGS4, Can recognize the time at which the elastic waves are received, so that the elastic wave velocities in the respective sections can be measured.

In the above-described manner, the velocity of the acoustic wave generated artificially in the receiver and the receiver can be measured in each section. The forward acoustic wave velocity may be measured by controlling the respective elastic wave generating and receivers AGS1, AGS2, AGS3, and AGS4 by the above-mentioned leakage position determining unit LLCP.

8 is a view for explaining a method of measuring a reverse acoustic wave velocity according to an embodiment of the present invention. Referring to FIG. 8, a method of measuring the reverse acoustic wave velocity in the first section, the second section, and the third section will be described.

The method of measuring the reverse acoustic wave velocity according to an embodiment of the present invention includes generating an acoustic wave located at an end point of the third section and artificially generating an acoustic wave in the receiver AGS4.

The elastic waves artificially generated by the AGS 4 are mainly moved along the pipe L. Here, it is assumed that the water flowing in the pipe L flows in the second section and the third section from the start point of the first section through the end point of the first section.

The elastic wave traveling along the pipe L is generated at the start point of the third section (also the end point of the second section in this embodiment) and the receiver AGS3, the starting point of the second section (Which is also the end point of the first section in the example) and the receiver AGS2, and the elastic wave generation and receiver AGS1 located at the start point of the first section.

(Length of the first section, length of the second section, length of the third section), and AGS1, AGS2, AGS4, AGS2, AGS3 and AGS4, Since the time at which each of the elastic waves is received is known, the elastic wave velocity in each of the segments can be measured.

In the manner described above, the velocity of an artificially generated seismic wave can be measured for each section. The reverse acoustic wave velocity can be measured by controlling the respective elastic wave generators AGS1, AGS2, AGS3, and AGS4 by the above-described leak position determining unit LLCP.

In addition, the elastic wave generation and receivers AGS1, AGS2, AGS3, and AGS4 according to the embodiment of the present invention can generate the elastic wave velocity at different frequencies. Therefore, the seismic velocity measured for each frequency can be measured in each section. For example, the elastic wave generation and receivers AGS1, AGS2, AGS3, and AGS4 generate an acoustic wave having the first frequency, and the leak position determining unit LLCP can measure the forward acoustic wave velocity and the reverse acoustic wave velocity for each section . Then, the elastic wave generation and receivers AGS1, AGS2, AGS3, and AGS4 generate elastic waves having the second frequency, and the leak position determining unit LLCP measures the forward elastic wave velocity and the backward elastic wave velocity by intervals. The forward and backward seismic velocities in each section of the pipe L can be measured while varying the frequency in this manner.

In the present embodiment, the leak position determining unit LLCP determines a plurality of elastic waves generated in the pipe L and an elastic wave estimated to be leaked among the elastic waves sensed by the receivers, (For example, the first section acoustic velocity, the second section acoustic wave velocity, or the third section acoustic wave velocity) stored in the storage section.

Hereinafter, a method of determining the leak position by the leak position determining unit LLCP will be described in detail.

First Embodiment

In the first embodiment, three sections are defined in the pipe L, and one acoustic wave velocity is associated with each section and stored in a storage section (not shown). The first embodiment will be described with reference to FIGS. 2 and 9 do.

Referring to FIGS. 2 and 9, the pipe L includes an elastic wave generating region and a region ('first section') from where the receiver AGS1 is located to where the elastic wave generation and the receiver AGS2 are located, And the area from the place where the receiver AGS2 is located to the place where the elastic wave generation and the receiver AGS3 are located (the 'second section'), the generation of the elastic wave and the receiver AGS3, AGS4) is located ('third section').

2 and 9, the acoustic wave velocity corresponding to the first section is the forward acoustic wave velocity V12, the acoustic wave velocity corresponding to the second section is the forward acoustic wave velocity V23, and the acoustic wave velocity corresponding to the third section is the forward direction Seismic velocity V34. Here, the corresponding acoustic velocities V12, V23, and V34 may be stored in advance in the storage unit (not shown). Additionally, the storage unit (not shown) may store the length of each section in the pipe, the generation of elastic waves, and the positions of receivers AGS1, AGS2, AGS3, AGS4.

In such a situation, it is assumed that a leak occurs at the leakage position as shown in Fig.

In the present embodiment, the elastic wave generation and receivers AGS1, AGS2, AGS3, and AGS4 monitor the elastic waves generated in the pipe L. The leakage position determination unit LLCP detects the elastic waves and the receivers AGS1, AGS2, AGS3 and AGS4 with the reference waveform to determine whether the seismic waves generated by the seismic waves and the seismic waves sensed by the receivers AGS1, AGS2, AGS3 and AGS4 are caused by the leakage. Here, the reference waveform refers to a waveform of an elastic wave generated due to leakage, and is a waveform that the leak position determining unit (LLCP) already knows.

In the present embodiment, the leak position determining unit LLCP compares the previously recognized reference waveform with the acoustic waves generated and the acoustic waves sensed by the receivers AGS1, AGS2, AGS3, and AGS4, AGS2, AGS3, AGS4) is generated by leakage, this method is illustrative, so that the present invention can be applied to other methods for determining whether seismic waves are generated due to leakage May be used.

9, when water leakage occurs from the water leakage position, the elastic waves and the receivers AGS1, AGS2, AGS3, and AGS4 sense the elastic waves. The elastic waves detected by the elastic wave generation and receivers AGS1, AGS2, AGS3 and AGS4 are provided to a leakage position determining unit LLCP, and the leakage position determining unit LLCP is provided with elastic wave generating and receivers AGS1, AGS2, , AGS4) is compared with the reference waveform to determine whether it is caused by leakage.

The leak position determining unit LLCP determines the elastic wave generation period (the section including the position where the elastic wave is generated) when it is determined that the elastic wave detected by the elastic wave generation and receivers AGS1, AGS2, AGS3, do. There are many ways to determine the seismic wave generation interval.

An example of a method for determining an elastic wave generation period is as follows. The leakage position determination unit LLCP determines the position of a receiver that senses an elastic wave having the strongest intensity among elastic wave generation and receivers AGS1, AGS2, AGS3, and AGS4, The candidate section is selected using the position of the receiver that senses the second largest acoustic wave, and it is verified whether the candidate section corresponds to the elastic wave generation section. If the candidate section is determined to be valid, the candidate section is determined as the elastic wave generation section. If it is determined that the candidate section is not valid, the other section is selected as a candidate section and the elastic wave generation section is determined through the verification process.

Now, assuming that an acoustic wave is generated at the leakage position shown in FIG. 9, the intensity of the acoustic wave sensed by the AGS 2 is the largest, and the intensity of the acoustic wave sensed by the AGS 3 is the second largest. The leak position determining unit LLCP selects a section between the position of the AGS 2 and the position of the AGS 3, that is, the second section, as the candidate section. For example, the leak locating unit LLCP can select the second section as the candidate section by referring to the position of the AGS 2 and the position of the AGS 3 stored in the storage unit (not shown).

The leak position determining unit LLCP uses the time at which the elastic wave generation and receivers AGS2 and AGS3 receive the elastic wave generated from the leakage position, the length of the second section, and the elastic wave velocity corresponding to the second section, And verifies whether the second section is an elastic wave generation period. For example, the leak locating section LLCP can determine the verification and leak location using the equations shown by way of example in Fig.

FIG. 12 shows the application of the equation of FIG. 11 to the present embodiment, which will be described below with reference to FIG.

The leak position determining unit LLCP determines that the second section is valid when X satisfying the equation (6) in FIG. 12 exists, and determines the second section as the elastic wave generating section. If there is no X that satisfies the expression (6) in Fig. 12, the leak position determining unit LLCP reselects another section as the candidate section, It is determined whether there is an X that satisfies the expression.

12, it is assumed that the length of the second section is L23, the time at which the elastic wave is generated at the water leakage point is t, the time at which the AGS2 receives the elastic wave is t? 2, and the time at which the AGS3 receives the elastic wave is t? And V is the acoustic wave velocity corresponding to the second section. Here, since the absolute value of the difference between t? 2 and t? 3 can be calculated by the leak position determining unit LLCP and the length L23 of the second section is stored in the storage unit (not shown), the leakage position determining unit (LLCP) Lt; RTI ID = 0.0 > X < / RTI >

When leakage occurs as shown in FIG. 9, the second section is selected as the candidate section, and X satisfying the expression (6) in FIG. 12 exists, so that the second section is a valid section, and X It will be determined as the leakage position.

Now, it is assumed that leakage occurs at the portion denoted by P in Fig. In this case, the intensity of the acoustic wave detected by the AGS 3 is the largest, and the intensity of the acoustic wave sensed by the AGS 4 is the second largest. The leak position determining unit LLCP selects a section between the position of the AGS 3 and the position of the AGS 4, that is, the third section, as the candidate section.

The leak position determining unit LLCP determines the time at which the elastic wave generation and receivers AGS3 and AGS4 receive the elastic wave generated from the leaked position and the elastic wave velocity V corresponding to the length L34 of the third section and the third section To verify that the third section is the elastic wave generation section.

For example, the leak locating section LLCP can determine the verification and leak location using the equations shown by way of example in Fig.

FIG. 13 shows the application of the equation of FIG. 11 to the present embodiment, which will be described below with reference to FIG.

For example, the leak position determining unit LLCP determines that the third section is valid when X satisfying the equation (9) to be described later exists, and determines the third section as the elastic wave generating section. If there is no X that satisfies the expression (9) in FIG. 13, the leak position determining unit LLCP selects another section as the candidate section again, Quot; X " The candidate section continues until it is judged to be valid.

In the case where leakage occurs in the portion indicated by P in FIG. 9 and the third section is selected as the candidate section, since there is no X satisfying the expression (9) in FIG. 13, the third section is an invalid section . In this case, the leak position determining unit LLCP selects the receiver AGS2 that senses the third largest acoustic wave, and the third receiver AGS2 selects the third acoustic wave having the strongest intensity among the AGS2 As a candidate section.

Now, as described with reference to Fig. 12, the leak position determining unit LLCP can judge whether or not the second interval is an effective interval as to whether or not the expression (6) in Fig. 12 is satisfied.

In the above-described first embodiment, a case where one acoustic wave velocity is associated with each section (for example, a forward acoustic wave velocity) has been described. However, this is an example, and it is also possible to configure the reverse acoustic wave velocity to correspond to each section Do. Alternatively, it is also possible to configure such that the values obtained by averaging the forward and backward elastic wave velocities correspond to each interval.

Second Embodiment

The second embodiment will be described with reference to FIG. 2 and FIG. 10, where three sections are defined in the pipe L, and the acoustic wave velocities are stored in a storage section (not shown) for each section.

The difference between the second embodiment and the first embodiment is that the forward and backward elastic wave velocities are both used in the second embodiment. Hereinafter, differences from the first embodiment will be mainly described.

2 and 10, the acoustic wave velocity in the first section is the forward acoustic wave velocity V12 and the reverse acoustic wave velocity V21, the acoustic wave velocity in the second section is the forward acoustic wave velocity V23 and the reverse acoustic wave velocity V32, The acoustic wave velocity is the forward acoustic wave velocity V34 and the reverse acoustic wave velocity V43. Here, the acoustic velocities V12, V21, V23, V32, V34, and V43 for each section may be stored in advance in a storage unit (not shown). The storage unit (not shown) also stores the length of each section in the pipe, the generation of elastic waves, and the positions of the receivers AGS1, AGS2, AGS3, and AGS4.

In such a situation, it is assumed that leakage occurs at the leakage position as shown in Fig.

The elastic wave generation and receivers AGS1, AGS2, AGS3 and AGS4 monitor the elastic waves generated in the pipe L. Based on the elastic waves sensed by the receivers, the leakage position determination unit LLCP It is possible to judge whether or not it is a seismic wave. Whether or not the elastic wave is generated due to the leakage may be known in the art.

10, when water leakage occurs at the leakage position, the elastic waves and the receivers AGS1, AGS2, AGS3, and AGS4 sense the elastic waves. The elastic waves detected by the elastic wave generation and receivers AGS1, AGS2, AGS3 and AGS4 are provided to a leakage position determining unit LLCP, and the leakage position determining unit LLCP is provided with elastic wave generating and receivers AGS1, AGS2, , AGS4) is generated by the leakage water.

The leak position determining unit LLCP determines the elastic wave generating period (the section including the position where the elastic wave is generated) when it is determined that the elastic wave detected by the elastic wave generation and receivers AGS1, AGS2, AGS3, do. There are many ways to determine the seismic wave generation interval.

An example of a method for determining an elastic wave generation period is as follows. The leakage position determination unit LLCP determines the position of a receiver that senses an elastic wave having the strongest intensity among elastic wave generation and receivers AGS1, AGS2, AGS3, and AGS4, The candidate section is selected using the position of the receiver that senses the second largest acoustic wave, and it is verified whether the candidate section corresponds to the elastic wave generation section. If the candidate section is determined to be valid, the candidate section is determined as the elastic wave generation section. If it is determined that the candidate section is not valid, the other section is selected as a candidate section and the elastic wave generation section is determined through the verification process.

Now, if an elastic wave is generated at the leakage position shown in FIG. 10, the intensity of the elastic wave detected by the AGS 2 is the largest, and the intensity of the elastic wave sensed by the AGS 3 is the second largest. The leak position determining unit LLCP selects a section between the position of the AGS 2 and the position of the AGS 3, that is, the second section, as the candidate section. For example, the leak locating unit LLCP can select the second section as the candidate section by referring to the position of the AGS 2 and the position of the AGS 3 stored in the storage unit (not shown).

The leak position determining unit LLCP determines the time at which the elastic wave generation and receivers AGS2 and AGS3 receive the elastic wave generated from the leaked position, the length of the second section, and the elastic wave velocity of the second section Reverse direction elastic wave velocity V32) is used to verify that the second section is the elastic wave generation period. For example, the leak position determining unit LLCP determines that the second section is valid when L? 3 (or L? 2) satisfying the expression (3) "(or (3)") 2 section is determined as an elastic wave generation section. If L? 3 (or L? 2) satisfying the expression (3) "(or (3)") in FIG. 11 does not exist, the leak locating section LLCP reselects another section as a candidate section, And performs a verification process for the candidate region again selected.

10, the second section is selected as the candidate section, and L? 3 (or L? 2) satisfying the expression (3) "(or (3)") The second section is an effective section, and L? 3 (or L? 2) will be determined as the leak position.

Now, it is assumed that a leak occurs at the portion denoted by P in Fig. In this case, the intensity of the acoustic wave detected by the AGS 3 is the largest, and the intensity of the acoustic wave sensed by the AGS 4 is the second largest. The leak position determining unit LLCP selects a section between the position of the AGS 3 and the position of the AGS 4, that is, the third section, as the candidate section.

The leak position determining unit LLCP determines the time at which the elastic wave generation and receivers AGS3 and AGS4 receive the elastic wave generated from the leakage position and the elastic wave velocity V34 corresponding to the length L34 of the third section and the third section , It can be verified whether or not the third section is the elastic wave generation section. If the third section is not valid, the leak locating section LLCP selects another section as a candidate section and verifies the candidate section again. This operation continues until the candidate interval is verified as valid.

In the case where leakage occurs in the portion indicated by P in FIG. 10, if the third section is selected as the candidate section, the verification result for the third section will not be valid. In this case, the leak position determining unit LLCP determines that the second section, which is a section located between the receiver AGS2 that senses the third largest acoustic wave and the receiver AGS3 that receives the acoustic wave having the strongest intensity, And verifies again for the second section.

For a more detailed description of the verification operation, please refer to the description of the first embodiment.

11 is a diagram for explaining a formula used for verifying a candidate section and determining a leakage position using an acoustic wave velocity.

Referring to FIG. 11, the formula used to verify the candidate interval and determine the leak location can be defined as follows.

[Equation 1]

The meaning of the symbol is as follows.

t Φ2: Time at which the elastic wave is generated and the receiver (AGS2) receives the elastic wave

t Φ3: Time at which the elastic wave is generated and the receiver (AGS3) receives the elastic wave

Lφ2: Distance to elastic wave generation and receiver (AGS2)

Lφ3: Distance between generation of elastic wave and receiver (AGS3)

L23: length of the second section

V32: reverse seismic velocity in the second section

V23: forward elastic wave velocity in the second section

According to an embodiment of the present invention, the leak position determining unit (LLCP) can determine the leakage position while verifying the candidate section using Equation (1).

4 is a view for explaining a leakage position detection method based on seismic velocity measured for each section in a pipe according to an embodiment of the present invention.

Referring to FIG. 4, a method of detecting a leaked position based on an acoustic wave velocity measured in each section in a pipe according to an embodiment of the present invention includes steps of monitoring an acoustic wave generated in a pipe (S101) (Step S103) of determining an elastic wave estimated as a leak, a time when an elastic wave determined at S103 is received, an elastic wave generated by sensing an elastic wave determined at S103, and a position of a receiver, (S105), determining a leak position (S107), and storing and reporting the leak position (S109).

The leak detection method based on the acoustic wave velocity measured in each pipe in the pipe according to an embodiment of the present invention may further include a step S100 of arbitrarily generating elastic waves for each section in the pipe for detecting leakage and receiving elastic waves, (Step S102) of measuring the velocity of the elastic waves received in step S102 and storing the elastic wave velocity of each section measured in step S102 (step S104), and the elastic wave velocity of each section stored in step S104 is used in step S105 do.

5 is a view for explaining a leakage position detection method based on seismic velocity measured for each section in a pipe according to another embodiment of the present invention.

Referring to FIG. 5, a method of detecting a leakage position based on an elastic wave velocity measured in each pipe in a pipe according to an embodiment of the present invention includes monitoring (S201) an elastic wave generated in a pipe, (Step S203) of determining an elastic wave estimated as a leak, a time of receiving an elastic wave determined at step S203, an elastic wave generated by sensing an elastic wave determined at step S203, and a position of a receiver, (S205), determining a leakage position (S207), verifying that the elastic wave generation interval is valid (S209), and storing and reporting the leakage position (S211). In this embodiment, if the elastic wave generation period is not valid as a result of step S209, the process is resumed from step S205. In steps S207 and S209, for example, the equation (1) can be used.

The leakage position detection method based on the acoustic wave velocity measured in each section in the pipe according to the embodiment of the present invention may further include a step S200 of randomly generating acoustic waves and generating seismic waves for each section in the pipe for detecting the leakage, (S202) of measuring the velocities of the elastic waves received in step S202 and storing the elastic wave velocities measured in step S202 (S204). The elastic wave velocities of the sections stored in step S204 are used in step S205 do.

FIG. 6 is a view for explaining a leakage position detection method based on seismic velocity measured for each section in a pipe according to another embodiment of the present invention.

Referring to FIG. 6, a method of detecting a leaked position based on an acoustic wave velocity measured in each pipe in a pipe according to an embodiment of the present invention includes a step (S301) of determining whether an acoustic wave velocity exists for each section of the pipe (S301) (S305) of determining the seismic wave estimated as leakage water among the seismic waves detected as the monitoring result, the time when the seismic wave determined at S305 is received at the step S305 (S307), determining a leak position (S309), verifying whether the elastic wave generation period is valid (S311), and determining whether or not the leakage And storing and reporting the position (S313). In this embodiment, if the velocity of the seismic wave for each section does not exist as a result of step S301, steps S300 to S304 are performed. If the elastic wave generation period is not valid as a result of step S311, the process is resumed from step S307. In steps S309 and S311, for example, Equation 1 may be used.

The leakage location detection method based on the seepage velocity based on the seepage velocity measured in each pipe in the pipe according to the embodiment of the present invention may further include a step S300 of arbitrarily generating seismic waves and a seismic wave for each section in the pipe to detect leakage S300, (Step S302) of measuring the velocity of the elastic waves received in step S302 and storing the elastic wave velocity of each section measured in step S302. In step S304, the elastic wave velocity of each section stored in step S304 is used in step S305. do. When the step S304 is completed, the step S303 is performed.

As described above, in the embodiments described with reference to Figs. 1 to 13, the generation of acoustic waves and the receiver are described as being capable of generating acoustic waves and receiving acoustic waves. However, those skilled in the art will appreciate that the present invention may be practiced by implementing the elastic wave generator and the elastic wave receiver as separate devices, as long as those skilled in the art are familiar with the present invention.

In the above-described embodiments, it has been described that the leak position determining unit (LLCP) performs both the operation of determining that the elastic wave sensed by the pipe is caused by the leakage water and the operation of determining the leakage position. However, As an example, the operation of determining that the seismic wave sensed by the piping is caused by the leakage water is performed by a component other than the leakage position determining unit LLCP, and the leakage position determining unit LLCP determines the leakage position It is also possible to configure to perform only the operation.

Also, in the above-described embodiments, it has been described that the leak position determining unit (LLCP) performs the operation of measuring the seepage velocity of each section in the pipe. However, this is an illustrative example, It is also possible that the operation is performed by a component other than the leak locating unit (LLCP).

Various modifications and variations may be made to the present invention by those skilled in the art to which the present invention pertains. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

AGS1, AGS2, AGS3, AGS4: Acoustic wave generator and receiver
LLCP: Leakage position detection unit

Claims (15)

Elastic wave generation and receivers for sensing elastic waves generated in the pipe;
A leakage position determining unit for determining the seismic wave estimated as the leakage water among the elastic waves generated by the generation of the elastic wave and the receivers and for determining the position where the elastic wave estimated as the leakage is generated using the elastic wave velocity measured for each of the intervals; / RTI >
The leakage position determination unit
Wherein when the elastic wave estimated to be leaked is determined, an elastic wave generation section is selected, an elastic wave generation position estimated by the leakage is determined using the elastic wave velocity corresponding to the elastic wave generation section,
The leakage position determination unit
A candidate section is selected based on the intensity of the seismic wave estimated by the leakage, a selected candidate section is verified, and if the candidate section is valid, the candidate section is selected as an elastic wave generation section,
The leakage position determination unit
When the candidate section is verified, the following equation

And determines whether or not a value is derived,

Here, V32 and V23 are acoustic wave velocities measured and stored for the candidate pipe,

Is the time at which the elastic wave generated at the start point of the candidate pipe and the elastic wave estimated at the receiver by the leakage are received,

Is the time at which the elastic wave generated at the end point of the candidate pipe and the elastic wave estimated by the receiver are received,

Is the length of the candidate pipe,
The leakage position determination unit
As a result of the verification operation,

And if the value is not derived, the candidate region is selected again, and the selected region is verified again. The leaking position detection system based on seismic velocity measured in each pipe in the pipe. The method according to claim 1,
And a storage unit for storing the elastic wave velocity and the reference waveform measured for each section in the pipe for detecting the leakage,
Wherein the leakage position determining unit determines the elastic wave estimated by the leakage by comparing the reference wave stored in the storage unit and the elastic waves sensed by the elastic wave generating and receivers, Based leak detection system. The method according to claim 1,
The leakage position determination unit
As a result of the verification operation,

Once the value is derived,

And the value of the leakage position is determined as the leakage position. The method according to claim 1,
Wherein the leakage position determining unit is configured to cause the first elastic wave generating unit located at the starting point of the first section of the pipe to generate an elastic wave and the second elastic wave generating unit positioned at the end of the first section to generate the elastic wave, 1 When a seismic wave is generated and an acoustic wave artificially generated by the receiver is detected,
The leakage position determination unit determines the time at which the first elastic wave is generated and the time at which the receiver artificially generates the elastic wave, the time at which the second elastic wave is generated and the receiver senses the elastic wave generated by the first elastic wave and the receiver, The length of the first section is used to measure the elastic wave velocity in the first section, and the leaky position detection system based on the elastic wave velocity measured in each of the sections in the pipe. 5. The method of claim 4,
The leakage position determining unit may further cause the second elastic wave generator positioned at the end of the first section to generate the elastic wave and the first elastic wave generator positioned at the starting point of the first section and the receiver, 2 When the generation of the elastic wave and the elastic wave generated by the receiver are detected,
The leakage position determination unit determines the time at which the second elastic wave is generated and the time at which the receiver artificially generates the elastic wave, the time at which the first elastic wave is generated and the receiver senses the elastic wave generated by the second elastic wave and the receiver, The length of the first section is used to measure the elastic wave velocity in the first section, and the leaky position detection system based on the elastic wave velocity measured in each of the sections in the pipe. 5. The method of claim 4,
The leakage position determining unit may cause the first elastic wave generator and the receiver to generate elastic waves with different frequencies when measuring the elastic wave velocity in the first section and measure the elastic wave velocities according to the frequencies in the first section. Leakage Location Detection System Based on Seismic Velocity Measured by Piping in Pipeline. delete delete delete delete delete delete delete delete delete

Images