CN114508704B - Pipeline leakage detection method and device and storage medium - Google Patents
Pipeline leakage detection method and device and storage medium Download PDFInfo
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- CN114508704B CN114508704B CN202011279394.0A CN202011279394A CN114508704B CN 114508704 B CN114508704 B CN 114508704B CN 202011279394 A CN202011279394 A CN 202011279394A CN 114508704 B CN114508704 B CN 114508704B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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Abstract
The application discloses a pipeline leakage detection method and device and a storage medium, and belongs to the technical field of pipelines. The method comprises the following steps: controlling a flow opening of the fluid in the target pipe by the opening control device; acquiring an upstream end pressure transient signal and a downstream end pressure transient signal; and if the leakage attenuation rate of at least one harmonic signal in the upstream end pressure transient signal is determined to be greater than the corresponding upstream end leakage attenuation rate threshold value, and the leakage attenuation rate of at least one harmonic signal in the downstream end pressure transient signal is determined to be greater than the corresponding downstream end leakage attenuation rate threshold value, determining that the target pipeline is leaked. The pipeline leakage detection method belongs to an active detection method, has higher accuracy of identifying and positioning the pipeline with slow leakage continuously, and effectively improves the effect of detecting the leakage of the pipeline.
Description
Technical Field
The present application relates to the field of pipeline technologies, and in particular, to a method and apparatus for detecting pipeline leakage, and a storage medium.
Background
In the service process of the pipeline, leakage accidents of the pipeline occur due to corrosion, accidental damage and other reasons, and leakage points are difficult to discover in time due to the fact that the distance between adjacent stations for monitoring the running condition of the pipeline is long.
In the related art, in order to monitor the running condition of a pipeline in real time and discover pipeline leakage in time, a pipeline is often provided with a leakage monitoring system adopting a passive detection mode. The leakage monitoring system passively acquires the pressure at two ends of the pipeline and analyzes whether the pressure at two ends of the pipeline is reduced by more than a preset threshold value in real time so as to determine whether the pipeline has leakage.
However, for a pipeline with slow leakage continuously, the leakage is small, and the pressure at two ends of the pipeline is small in drop value, so that the leakage monitoring system adopting the passive detection mode cannot accurately determine whether the leakage exists or not, and the current effect of detecting the leakage of the pipeline is poor.
Disclosure of Invention
The embodiment of the application provides a pipeline leakage detection method and device and a storage medium. The problem of prior art's effect relatively poor of leaking to detect the pipeline can be solved, technical scheme is as follows:
In one aspect, there is provided a pipe leakage detection method applied to a signal processing apparatus in a pipe leakage detection system, the pipe leakage detection system further comprising: the system comprises an upstream end signal acquisition device and an opening control device which are positioned at the upstream end of a target pipeline, and a downstream end signal acquisition device which is positioned at the downstream end of the target pipeline, wherein the upstream end signal acquisition device, the opening control device and the downstream end signal acquisition device are all in communication connection with the signal processing device; the method comprises the following steps:
Controlling a flow opening of the fluid in the target pipe by the opening control device;
Acquiring an upstream end pressure transient signal and a downstream end pressure transient signal, wherein the upstream end pressure transient signal is generated after the upstream end signal acquisition equipment samples the pressure of the upstream end of the target pipeline, and the downstream end pressure transient signal is generated after the downstream end signal acquisition equipment samples the pressure of the downstream end of the target pipeline;
if it is determined that the leakage attenuation rate of at least one harmonic signal in the upstream end pressure transient signal is greater than the corresponding upstream end leakage attenuation rate threshold value, and the leakage attenuation rate of at least one harmonic signal in the downstream end pressure transient signal is greater than the corresponding downstream end leakage attenuation rate threshold value, determining that the target pipeline is leaked;
The location of the leak point in the target pipe is determined based on the leakage decay rate of at least one harmonic signal in the upstream end pressure transient signal or the leakage decay rate of at least one harmonic signal in the downstream end pressure transient signal.
In another aspect, there is provided a pipe leakage detection device integrated in a signal processing apparatus in a pipe leakage detection system, the pipe leakage detection system further comprising: an upstream end signal acquisition device and an opening control device positioned at an upstream end of a target pipeline, and a downstream end signal acquisition device positioned at a downstream end of the target pipeline, wherein the upstream end signal acquisition device, the opening control device and the downstream end signal acquisition device are all in communication connection with the signal processing device, and fluid in the target pipeline flows from the upstream end of the target pipeline to the downstream end of the target pipeline; the device comprises:
an opening control module for controlling a flow opening of the fluid in the target pipeline by the opening control device;
The system comprises an acquisition module, a target pipeline and a target pipeline, wherein the acquisition module is used for acquiring an upstream end pressure transient signal and a downstream end pressure transient signal, the upstream end pressure transient signal is generated after the upstream end signal acquisition equipment samples the pressure of the upstream end of the target pipeline, and the downstream end pressure transient signal is generated after the downstream end signal acquisition equipment samples the pressure of the downstream end of the target pipeline;
The leakage determination module is used for determining that the target pipeline leaks if the leakage attenuation rate of at least one harmonic signal in the upstream end pressure transient signal is determined to be greater than the corresponding upstream end leakage attenuation rate threshold value, and the leakage attenuation rate of at least one harmonic signal in the downstream end pressure transient signal is determined to be greater than the corresponding downstream end leakage attenuation rate threshold value;
a dew point position determination module for determining a position of a leak in the target pipe based on a leakage decay rate of at least one harmonic signal in the upstream end pressure transient signal or a leakage decay rate of at least one harmonic signal in the downstream end pressure transient signal.
In yet another aspect, a computer readable storage medium having instructions stored therein that, when executed on a processing assembly, cause the processing assembly to perform the above-described pipe leak detection method is provided.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
the flow opening of the fluid in the target pipe is controlled by the opening control device so that the fluid in the target pipe assumes a transient state. In this way, the upstream end pressure transient signal of the upstream end of the target pipe can be acquired by the upstream end signal acquisition device, and the downstream end pressure transient signal of the downstream end of the target pipe can be acquired by the downstream end signal acquisition device. Since the attenuation rate of at least one of the upstream-end pressure transient signals when there is a leak in the target pipe is different from the attenuation rate of at least one of the upstream-end pressure transient signals when there is no leak in the target pipe, and the attenuation rate of at least one of the downstream-end pressure transient signals when there is a leak in the target pipe is also different from the attenuation rate of at least one of the downstream-end pressure transient signals when there is no leak in the target pipe, it is possible to determine whether there is a leak in the target pipe by analyzing the leakage attenuation rate of at least one of the upstream-end pressure transient signals, and the leakage attenuation rate of at least one of the downstream-end pressure transient signals. And, the position of the leak point in the target pipe can be determined by the leak attenuation rate of at least one harmonic signal in the upstream end pressure transient signal or the leak attenuation rate of at least one harmonic signal in the downstream end pressure transient signal. The pipeline leakage detection method belongs to an active detection method, has higher accuracy of identifying and positioning the pipeline with slow leakage continuously, and effectively improves the effect of detecting the leakage of the pipeline.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a pipeline leakage detection system according to a pipeline leakage detection method according to an embodiment of the present application;
FIG. 2 is a flow chart of a method for detecting pipeline leakage according to an embodiment of the present application;
FIG. 3 is a flow chart of another method for detecting pipeline leakage according to an embodiment of the present application;
FIG. 4 is a block diagram of a piping leakage detecting device according to an embodiment of the present application;
fig. 5 is a block diagram of another apparatus for detecting a leakage of a pipeline according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a pipeline leakage detection system according to a pipeline leakage detection method according to an embodiment of the present application.
The pipe leak detection system may include: an information processing device 101, an upstream-end signal acquisition device 102 and an opening degree control device 103 located at the upstream end of the target pipe, and a downstream-end signal acquisition device 104 located at the downstream end of the target pipe.
Wherein the upstream-side signal acquisition device 102, the opening degree control device 103, and the downstream-side signal acquisition device 104 are all communicatively connected to the signal processing device 101. The fluid within the target pipe flows from the upstream end of the target pipe 00 to the downstream end of the target pipe. That is, the upstream end of the target pipe 00 is the upstream end, the downstream end of the target pipe is the downstream end, and the opening degree control device 103 in the pipe leakage detection system is located at the upstream end of the target pipe.
The target conduit may be a length of tubing in a long hydrocarbon transmission conduit, which is generally referred to as a conduit between the upstream end signal acquisition device 102 and the downstream end signal acquisition device 104. The length of the target pipeline is greater than or equal to 15 km, wherein the length of the target pipeline is: the length of the conduit between the upstream and downstream ends of the target conduit.
The information processing apparatus 101 may be a terminal such as a desktop computer, a notebook computer, or a mobile phone, and the information processing apparatus 101 may also be a server or a server cluster composed of several servers.
It should be noted that, in the embodiment of the present application, the communication connection may be a communication connection established through a wired network or a wireless network.
Referring to fig. 2, fig. 2 is a flowchart of a method for detecting a pipeline leakage according to an embodiment of the application. The pipe leakage detection method is applied to an information processing apparatus in the pipe leakage detection system shown in fig. 1. The pipe leak detection method may include:
Step 201, controlling the flow opening of the fluid in the target pipeline by an opening control device.
Step 202, acquiring an upstream end pressure transient signal and a downstream end pressure transient signal.
The upstream end pressure transient signal is generated after the upstream end signal acquisition device samples the pressure of the upstream end of the target pipeline, and the downstream end pressure transient signal is generated after the downstream end signal acquisition device samples the pressure of the downstream end of the target pipeline.
Step 203, if it is determined that the leakage attenuation rate of at least one harmonic signal in the upstream end pressure transient signal is greater than the corresponding upstream end leakage attenuation rate threshold, and the leakage attenuation rate of at least one harmonic signal in the downstream end pressure transient signal is greater than the corresponding downstream end leakage attenuation rate threshold, determining that the target pipeline is leaked.
Step 204, determining a location of a leak in the target pipe based on a leak decay rate of at least one harmonic signal in the upstream end pressure transient signal or a leak decay rate of at least one harmonic signal in the downstream end pressure transient signal.
In summary, according to the pipeline leakage detection method provided by the embodiment of the application, the opening control device controls the flow opening of the fluid in the target pipeline, so that the fluid in the target pipeline presents a transient state. In this way, the upstream end pressure transient signal of the upstream end of the target pipe can be acquired by the upstream end signal acquisition device, and the downstream end pressure transient signal of the downstream end of the target pipe can be acquired by the downstream end signal acquisition device. Since the attenuation rate of at least one of the upstream-end pressure transient signals when there is a leak in the target pipe is different from the attenuation rate of at least one of the upstream-end pressure transient signals when there is no leak in the target pipe, and the attenuation rate of at least one of the downstream-end pressure transient signals when there is a leak in the target pipe is also different from the attenuation rate of at least one of the downstream-end pressure transient signals when there is no leak in the target pipe, it is possible to determine whether there is a leak in the target pipe by analyzing the leakage attenuation rate of at least one of the upstream-end pressure transient signals, and the leakage attenuation rate of at least one of the downstream-end pressure transient signals. And, the position of the leak point in the target pipe can be determined by the leak attenuation rate of at least one harmonic signal in the upstream end pressure transient signal or the leak attenuation rate of at least one harmonic signal in the downstream end pressure transient signal. The pipeline leakage detection method belongs to an active detection method, has higher accuracy of identifying and positioning the pipeline with slow leakage continuously, and effectively improves the effect of detecting the leakage of the pipeline.
Referring to fig. 3, fig. 3 is a flowchart of another method for detecting pipeline leakage according to an embodiment of the present application. The pipe leakage detection method is applied to an information processing apparatus in the pipe leakage detection system shown in fig. 1. The pipe leak detection method may include:
Step 301, controlling the flow opening of the fluid in the target pipe by an opening control device.
In the embodiment of the present application, the information processing apparatus may control the flow opening of the fluid in the target pipe by the opening control apparatus.
For example, as shown in fig. 1, the opening degree control apparatus 103 may include: an electrically operated valve 1031 located at the upstream end of the target piping, and an opening controller 1032 connected to the electrically operated valve 1031. The opening controller 1032 is communicatively connected to the information processing apparatus 101. The information processing apparatus 101 can send a control instruction to the opening controller 1032 so that the opening controller 1032 can control the opening of the electric valve 1031 based on the control instruction to realize control of the flow opening of the fluid in the target piping.
For example, when the opening degree of the electric valve 1031 is 100% at the time of normal fluid delivery of the target pipe, the information processing apparatus 101 may adjust the opening degree of the electric valve 1031 from 100% to 20% by the opening degree controller 1032, and at this time, the fluid in the target pipe may exhibit a pressure transient state (also referred to as transient flow), and the transient flow in the target pipe is delivered from the upstream end of the target pipe to the downstream end of the target pipe.
Step 302, acquiring an upstream end pressure transient signal and a downstream end pressure transient signal.
In the embodiment of the application, after the opening control device controls the flow opening of the fluid in the target pipeline to generate the transient flow in the target pipeline, the upstream end pressure transient signal and the downstream end pressure transient signal can be acquired through the signal processing device.
The upstream end pressure transient signal is generated after the upstream end signal acquisition equipment samples the pressure of the upstream end of the target pipeline, and the downstream end pressure transient signal is generated after the downstream end signal acquisition equipment samples the pressure of the downstream end of the target pipeline.
By way of example, the upstream-side signal acquisition device 102 may include: an upstream end pressure transmitter 1021 located at the upstream end of the target pipe, and an upstream end signal collector 1022 connected to the upstream end pressure transmitter 1021. The upstream side signal collector 1022 may sample the pressure value monitored by the upstream side pressure transmitter 1021 a plurality of times and transmit the collected pressure value to the information processing apparatus 101, so that the information processing apparatus 101 can generate an upstream side pressure transient signal based on the received pressure value.
The downstream signal acquisition device 104 may include: a downstream end pressure transmitter 1041 located at the downstream end of the target pipe, and a downstream end signal collector 1042 connected to the downstream end pressure transmitter 1041. The downstream side signal collector 1042 may sample the pressure value monitored by the downstream side pressure transmitter 1041 a plurality of times and send the collected pressure value to the information processing device 101 to enable the information processing device 101 to generate a downstream side pressure transient signal based on the received pressure value.
Step 303, determining a leakage attenuation rate of the first harmonic signal, a leakage attenuation rate of the second harmonic signal, and a leakage attenuation rate of the third harmonic signal in the upstream-end pressure transient signal.
In the embodiment of the application, after the information processing device acquires the upstream end pressure transient signal, the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the upstream end pressure transient signal can be determined.
In the present application, if there is no leakage in the target pipe, the attenuation rate of each subharmonic signal in the pressure transient signal generated by the change in the opening degree of the target pipe is related only to the friction coefficient of the inner wall of the pipe. Therefore, after the material of the target pipe is determined, the attenuation rate of each subharmonic signal in the pressure transient signal can be determined experimentally when the target pipe is free of leakage.
If the target pipeline has leakage, the attenuation rate of each subharmonic signal in the pressure transient signal generated by the opening change of the target pipeline is not only related to the friction coefficient of the inner wall of the target pipeline, but also related to the leakage intensity of the leakage point of the target pipeline. Therefore, after the attenuation rate of each subharmonic signal in the pressure transient signal is determined, the attenuation rate of each subharmonic signal in the pressure transient signal when no leakage exists in the target pipeline is subtracted from each subharmonic signal, and the obtained result is: leakage decay rate of each subharmonic signal in the pressure transient signal.
For example, assuming that the attenuation rate of the harmonic signal of the pressure transient signal when no leakage exists in the target pipe is R0 i and the attenuation rate of the harmonic signal of the pressure transient signal when leakage exists in the target pipe is R1 i, the leakage attenuation rate R i＝R1i－R0i of the pressure transient signal in the target pipe can be determined. Where i refers to the harmonic signal times.
From the above, in the present application, after the information processing apparatus acquires the upstream-end pressure transient signal, it is possible to determine the attenuation rate of the first harmonic signal, the attenuation rate of the second harmonic signal, and the attenuation rate of the third harmonic signal in the upstream-end pressure transient signal first; then, subtracting the attenuation rate of the first harmonic signal in the pressure transient signal at the upstream end from the attenuation rate of the first harmonic signal in the pressure transient signal at the upstream end when the target pipeline is free from leakage, thereby obtaining the following steps: leakage attenuation rate of the first harmonic signal in the upstream end pressure transient signal; and subtracting the attenuation rate of the second harmonic signal in the pressure transient signal at the upstream end when the target pipeline is not leaked from the attenuation rate of the second harmonic signal in the pressure transient signal at the upstream end, so as to obtain the target pipeline: leakage attenuation rate of the second harmonic signal in the upstream end pressure transient signal; and subtracting the attenuation rate of the third harmonic signal in the pressure transient signal at the upstream end when the target pipeline is not leaked from the attenuation rate of the third harmonic signal in the pressure transient signal at the upstream end, so as to obtain the target pipeline: leakage decay rate of third harmonic signal in the upstream end pressure transient signal.
The attenuation rate of the first harmonic signal, the attenuation rate of the second harmonic signal and the attenuation rate of the third harmonic signal in the upstream end pressure transient signal when the target pipeline does not have leakage are only related to the friction coefficient of the inner wall of the target pipeline, so that after the material of the target pipeline is determined, the attenuation rate of the first harmonic signal, the attenuation rate of the second harmonic signal and the attenuation rate of the third harmonic signal in the upstream end pressure transient signal when the target pipeline does not have leakage can be simulated in advance through experiments.
When the information processing apparatus determines the attenuation rate of the first harmonic signal, the attenuation rate of the second harmonic signal, and the attenuation rate of the third harmonic signal in the upstream-end pressure transient signal, the upstream-end pressure transient signal may be extracted to obtain the first harmonic signal, the second harmonic signal, and the third harmonic signal of the upstream-end pressure transient signal; then, each harmonic signal can be divided into a plurality of different periods, and fourier transformation is carried out on the divided signals with different periods to obtain a frequency spectrum in each period; then, based on the frequency spectrum in each period, the intensity of each subharmonic signal in different periods is calculated; and finally, fitting based on the intensities of the subharmonic signals in different periods to obtain the attenuation rate of the subharmonic signals.
Step 304, determining a leakage attenuation rate of the first harmonic signal, a leakage attenuation rate of the second harmonic signal and a leakage attenuation rate of the third harmonic signal in the downstream end pressure transient signal.
In the embodiment of the application, after the information processing device acquires the downstream end pressure transient signal, the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the downstream end pressure transient signal can be determined.
The information processing apparatus determines the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the downstream-end pressure transient signal in the same manner as the information processing apparatus determines the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the upstream-end pressure transient signal. Therefore, this step 304 may refer to the above step 303, and this will not be described in detail in the embodiment of the present application.
Step 305, detecting whether the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the upstream end pressure transient signal are all greater than the corresponding upstream end attenuation rate threshold, and detecting that the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the downstream end pressure transient signal are all greater than the respective downstream end leakage attenuation rate thresholds.
In the embodiment of the application, the information processing device can detect whether the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the upstream end pressure transient signal are all larger than the corresponding upstream end attenuation rate threshold values, and detect that the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the downstream end pressure transient signal are all larger than the respective corresponding downstream end leakage attenuation rate threshold values.
For example, if it is determined that the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the upstream-end pressure transient signal are all greater than the respective corresponding upstream-end leakage attenuation rate thresholds, and it is determined that the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the downstream-end pressure transient signal are all greater than the respective corresponding downstream-end leakage attenuation rate thresholds, step 306 is performed.
If it is determined that at least one of the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the upstream-end pressure transient signal is not greater than the respective corresponding upstream-end leakage attenuation rate threshold, or that at least one of the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the downstream-end pressure transient signal is not greater than the respective corresponding downstream-end leakage attenuation rate threshold, step 307 is performed.
In the present application, if there is no leakage in the pipe, the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the upstream-end pressure transient signal determined in the above step 303 are all approximately equal to 0; the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the downstream-end pressure transient signal determined in step 304 are also approximately equal to 0.
If there is no leakage in the pipe, but when the pipe is deformed, the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the upstream-end pressure transient signal determined in step 303 may not be equal to 0, but the leakage attenuation rates of the respective harmonic signals are small; the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the downstream-end pressure transient signal determined in step 304 may not be equal to 0, but the leakage attenuation rates of the respective harmonic signals are small.
If the pipeline has leakage, the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the upstream end pressure transient signal determined in the step 303 are larger; the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the downstream-end pressure transient signal determined in step 304 are also large.
Therefore, it is particularly important to correspondingly set reasonable upstream end leakage attenuation rate thresholds for the first harmonic signal, the second harmonic signal and the third harmonic signal in the upstream end pressure transient signal, and correspondingly set reasonable downstream end leakage attenuation rate thresholds for the first harmonic signal, the second harmonic signal and the third harmonic signal in the downstream end pressure transient signal.
In the embodiment of the application, a large number of simulation experiments can be performed in advance to analyze leakage attenuation rates of the first harmonic signal, the second harmonic signal and the third harmonic signal in the upstream end pressure transient signal and the downstream end pressure transient signal when the pipeline is not leaked but different deformations exist in the pipeline, and to analyze leakage attenuation rates of the first harmonic signal, the second harmonic signal and the third harmonic signal in the upstream end pressure transient signal and the downstream end pressure transient signal when different tiny leaks exist in the pipeline. Therefore, through a large amount of analysis, reasonable upstream end leakage attenuation rate thresholds corresponding to the first harmonic signal, the second harmonic signal and the third harmonic signal in the upstream end pressure transient signal and downstream end leakage attenuation rate thresholds corresponding to the first harmonic signal, the second harmonic signal and the third harmonic signal in the downstream end pressure transient signal can be obtained.
Step 306, if it is determined that the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the upstream end pressure transient signal are all greater than the corresponding upstream end leakage attenuation rate threshold, and it is determined that the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the downstream end pressure transient signal are all greater than the corresponding downstream end leakage attenuation rate threshold, it is determined that the target pipeline leaks.
In the embodiment of the application, if the information processing device determines that the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the upstream end pressure transient signal are all greater than the corresponding upstream end leakage attenuation rate threshold, and determines that the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the downstream end pressure transient signal are all greater than the corresponding downstream end leakage attenuation rate threshold, the information processing device can determine that the target pipeline is leaked.
In the present application, after the information processing apparatus determines that the leakage of the target pipe occurs, the information processing apparatus needs to perform step 308.
Step 307, determining that no leakage occurs in the target pipeline if it is determined that at least one of the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the upstream-end pressure transient signal is not greater than the respective corresponding upstream-end leakage attenuation rate threshold value, or that at least one of the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the downstream-end pressure transient signal is not greater than the respective corresponding downstream-end leakage attenuation rate threshold value.
In an embodiment of the application, if the information processing apparatus determines that at least one of the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the upstream-end pressure transient signal is not greater than the respective corresponding upstream-end leakage attenuation rate threshold, or that at least one of the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the downstream-end pressure transient signal is not greater than the respective corresponding downstream-end leakage attenuation rate threshold, the information processing apparatus may determine that no leakage occurs in the target pipeline.
In the present application, after the information processing apparatus determines that the target pipe is not leaking, the above step 305 needs to be repeatedly performed.
It should be noted that, in the embodiment of the present application, when determining whether a pipeline has a leak, the accuracy of determining whether the pipeline has a leak may be further improved by simultaneously considering the upstream end pressure transient signal generated at the upstream end of the target pipeline and the downstream end pressure transient signal generated at the downstream end of the target pipeline.
Step 308, determining the position of the leak point in the target pipeline based on the length of the target pipeline and the leak attenuation rate of the first harmonic signal, the leak attenuation rate of the second harmonic signal, and the leak attenuation rate of the third harmonic signal in the upstream end pressure transient signal, or the leak attenuation rate of the first harmonic signal, the leak attenuation rate of the second harmonic signal, and the leak attenuation rate of the third harmonic signal in the downstream end pressure transient signal.
In the embodiment of the application, when the information processing equipment determines that the target pipeline has leakage, the information processing equipment can determine the position of the leakage point in the target pipeline based on the length of the target pipeline, and the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the upstream end pressure transient signal, or the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the downstream end pressure transient signal.
In the present application, the information processing apparatus may determine the relative position of the leak point in the target pipe based on the leak attenuation rate of the first harmonic signal, the leak attenuation rate of the second harmonic signal, and the leak attenuation rate of the third harmonic signal in the pressure transient signal generated at any position in the target pipe.
By way of example, the information processing apparatus may employ a relative position calculation formula for the relative position of the leak point in the target pipe based on the leak attenuation rate of the first harmonic signal, the leak attenuation rate of the second harmonic signal, and the leak attenuation rate of the third harmonic signal in the pressure transient signal generated at any position in the target pipe. The leakage attenuation rate is calculated as follows:
Wherein, And/>Respectively representing leakage attenuation rates of two different harmonics; n 2 and n 1 represent the harmonic times of two different harmonics, respectively; x represents the relative position of the leak in the target pipe.
Thus, the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the pressure transient signal can be substituted into the above formula two by two, three relative positions of the leakage point in the target pipeline can be obtained, and the three relative positions are averaged to obtain the final relative position of the leakage point in the target pipeline.
The location of the leak in the target pipe may then be determined based on the length of the target pipe, and the relative location of the leak in the target pipe.
For example, the length of the target pipe may be multiplied by the relative location of the leak in the target pipe to obtain the location of the leak in the target pipe. The location of the leak in the target pipe is: the length of the pipeline between the leak in the target pipeline and any location within the target pipeline. Wherein, when calculating the relative position of the leakage point, the leakage attenuation rate of each subharmonic signal in the pressure transient signal generated at any position in the target pipeline is adopted.
In this way, if the relative position of the leak point in the target pipe is calculated using the leak attenuation rate of the first harmonic signal, the leak attenuation rate of the second harmonic signal, and the leak attenuation rate of the third harmonic signal in the upstream-end pressure transient signal, the pipe length between the leak point and the upstream end of the target pipe can be obtained by multiplying the relative position by the length of the target pipe; if the relative position of the leak point in the target pipeline is calculated by adopting the leak attenuation rate of the first harmonic signal, the leak attenuation rate of the second harmonic signal and the leak attenuation rate of the third harmonic signal in the downstream end pressure transient signal, the pipeline length between the leak point and the downstream end of the target pipeline can be obtained after multiplying the relative position by the length of the target pipeline.
In the application, after the information processing equipment determines the position of the leakage point in the target pipeline, the corresponding alarm information can be sent out so as to remind a worker to repair the leakage point as soon as possible.
In summary, according to the pipeline leakage detection method provided by the embodiment of the application, the opening control device controls the flow opening of the fluid in the target pipeline, so that the fluid in the target pipeline presents a transient state. In this way, the upstream end pressure transient signal of the upstream end of the target pipe can be acquired by the upstream end signal acquisition device, and the downstream end pressure transient signal of the downstream end of the target pipe can be acquired by the downstream end signal acquisition device. Since the attenuation rate of at least one of the upstream-end pressure transient signals when there is a leak in the target pipe is different from the attenuation rate of at least one of the upstream-end pressure transient signals when there is no leak in the target pipe, and the attenuation rate of at least one of the downstream-end pressure transient signals when there is a leak in the target pipe is also different from the attenuation rate of at least one of the downstream-end pressure transient signals when there is no leak in the target pipe, it is possible to determine whether there is a leak in the target pipe by analyzing the leakage attenuation rate of at least one of the upstream-end pressure transient signals, and the leakage attenuation rate of at least one of the downstream-end pressure transient signals. And, the position of the leak point in the target pipe can be determined by the leak attenuation rate of at least one harmonic signal in the upstream end pressure transient signal or the leak attenuation rate of at least one harmonic signal in the downstream end pressure transient signal. The pipeline leakage detection method belongs to an active detection method, has higher accuracy of identifying and positioning the pipeline with slow leakage continuously, and effectively improves the effect of detecting the leakage of the pipeline.
The embodiment of the application also provides a pipeline leakage detection device, as shown in fig. 4, and fig. 4 is a structural block diagram of the pipeline leakage detection device provided by the embodiment of the application. The pipe leakage detecting apparatus 400 is integrated in a signal processing device in the pipe leakage detecting system shown in fig. 1, and the pipe leakage detecting apparatus 400 may include:
an opening control module 401 for controlling the flow opening of the fluid in the target pipe by an opening control device.
The acquiring module 402 is configured to acquire an upstream end pressure transient signal and a downstream end pressure transient signal, where the upstream end pressure transient signal is generated after the upstream end signal acquisition device samples the pressure of the upstream end of the target pipeline, and the downstream end pressure transient signal is generated after the downstream end signal acquisition device samples the pressure of the downstream end of the target pipeline.
The leakage determining module 403 is configured to determine that the target pipeline leaks if it is determined that the leakage attenuation rate of at least one harmonic signal in the upstream end pressure transient signal is greater than the corresponding upstream end leakage attenuation rate threshold value, and the leakage attenuation rate of at least one harmonic signal in the downstream end pressure transient signal is greater than the corresponding downstream end leakage attenuation rate threshold value.
The dew point position determination module 404 is configured to determine a position of a leak in the target pipe based on a leak decay rate of at least one harmonic signal in the upstream end pressure transient signal or a leak decay rate of at least one harmonic signal in the downstream end pressure transient signal.
In summary, in the pipe leakage detection device provided by the embodiment of the present application, the opening control device controls the flow opening of the fluid in the target pipe, so that the fluid in the target pipe presents a transient state. In this way, the upstream end pressure transient signal of the upstream end of the target pipe can be acquired by the upstream end signal acquisition device, and the downstream end pressure transient signal of the downstream end of the target pipe can be acquired by the downstream end signal acquisition device. Since the attenuation rate of at least one of the upstream-end pressure transient signals when there is a leak in the target pipe is different from the attenuation rate of at least one of the upstream-end pressure transient signals when there is no leak in the target pipe, and the attenuation rate of at least one of the downstream-end pressure transient signals when there is a leak in the target pipe is also different from the attenuation rate of at least one of the downstream-end pressure transient signals when there is no leak in the target pipe, it is possible to determine whether there is a leak in the target pipe by analyzing the leakage attenuation rate of at least one of the upstream-end pressure transient signals, and the leakage attenuation rate of at least one of the downstream-end pressure transient signals. And, the position of the leak point in the target pipe can be determined by the leak attenuation rate of at least one harmonic signal in the upstream end pressure transient signal or the leak attenuation rate of at least one harmonic signal in the downstream end pressure transient signal. The pipeline leakage detection method belongs to an active detection method, has higher accuracy of identifying and positioning the pipeline with slow leakage continuously, and effectively improves the effect of detecting the leakage of the pipeline.
Alternatively, as shown in fig. 5, fig. 5 is a block diagram of another pipe leakage detecting device according to an embodiment of the present application. The pipe leakage detecting apparatus 400 may further include:
The upstream end determining module 405 is configured to determine a leakage attenuation rate of a first harmonic signal, a leakage attenuation rate of a second harmonic signal, and a leakage attenuation rate of a third harmonic signal in the upstream end pressure transient signal.
The downstream end determination module 406 is configured to determine a leakage attenuation rate of the first harmonic signal, a leakage attenuation rate of the second harmonic signal, and a leakage attenuation rate of the third harmonic signal in the downstream end pressure transient signal.
Optionally, the leakage determination module 403 is configured to:
If it is determined that the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the upstream end pressure transient signal are all greater than the corresponding upstream end leakage attenuation rate threshold values, and it is determined that the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the downstream end pressure transient signal are all greater than the corresponding downstream end leakage attenuation rate threshold values, it is determined that the target pipeline leaks.
Optionally, as shown in fig. 5, the pipe leakage detecting device 400 may further include: the non-leakage determination module 407 is configured to determine that no leakage occurs in the target pipeline if it is determined that at least one of the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the upstream-end pressure transient signal is not greater than the respective corresponding upstream-end leakage attenuation rate threshold value, or that at least one of the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal, and the leakage attenuation rate of the third harmonic signal in the downstream-end pressure transient signal is not greater than the respective corresponding downstream-end leakage attenuation rate threshold value.
Optionally, the dew point position determining module 404 is configured to: the position of the leak point in the target pipe is determined based on the length of the target pipe and the leak decay rate of the first harmonic signal, the leak decay rate of the second harmonic signal, and the leak decay rate of the third harmonic signal in the upstream-end pressure transient signal, or the leak decay rate of the first harmonic signal, the leak decay rate of the second harmonic signal, and the leak decay rate of the third harmonic signal in the downstream-end pressure transient signal.
In summary, in the pipe leakage detection device provided by the embodiment of the present application, the opening control device controls the flow opening of the fluid in the target pipe, so that the fluid in the target pipe presents a transient state. In this way, the upstream end pressure transient signal of the upstream end of the target pipe can be acquired by the upstream end signal acquisition device, and the downstream end pressure transient signal of the downstream end of the target pipe can be acquired by the downstream end signal acquisition device. Since the attenuation rate of at least one of the upstream-end pressure transient signals when there is a leak in the target pipe is different from the attenuation rate of at least one of the upstream-end pressure transient signals when there is no leak in the target pipe, and the attenuation rate of at least one of the downstream-end pressure transient signals when there is a leak in the target pipe is also different from the attenuation rate of at least one of the downstream-end pressure transient signals when there is no leak in the target pipe, it is possible to determine whether there is a leak in the target pipe by analyzing the leakage attenuation rate of at least one of the upstream-end pressure transient signals, and the leakage attenuation rate of at least one of the downstream-end pressure transient signals. And, the position of the leak point in the target pipe can be determined by the leak attenuation rate of at least one harmonic signal in the upstream end pressure transient signal or the leak attenuation rate of at least one harmonic signal in the downstream end pressure transient signal. The pipeline leakage detection method belongs to an active detection method, has higher accuracy of identifying and positioning the pipeline with slow leakage continuously, and effectively improves the effect of detecting the leakage of the pipeline.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus and modules described above may refer to the corresponding process in the foregoing method embodiment, which is not repeated herein.
Embodiments of the present application also provide a computer readable storage medium having stored therein at least one instruction that is loaded and executed by a processor to implement the pipe leak detection method shown in fig. 2 or 3.
The embodiment of the application also provides computer equipment, which comprises: a processor and a memory having stored therein at least one instruction that is loaded and executed by the processor to implement the pipe leak detection method shown in fig. 2 or 3.
The foregoing description of the preferred embodiments of the present application is not intended to limit the application, but is intended to cover all modifications, equivalents, alternatives, and improvements falling within the spirit and principles of the application.
Claims (6)
1. A pipe leakage detection method, characterized by being applied to a signal processing device in a pipe leakage detection system, the pipe leakage detection system further comprising: the system comprises an upstream end signal acquisition device and an opening control device which are positioned at the upstream end of a target pipeline, and a downstream end signal acquisition device which is positioned at the downstream end of the target pipeline, wherein the upstream end signal acquisition device, the opening control device and the downstream end signal acquisition device are all in communication connection with the signal processing device; the method comprises the following steps:
Controlling a flow opening of the fluid in the target pipe by the opening control device;
Acquiring an upstream end pressure transient signal and a downstream end pressure transient signal, wherein the upstream end pressure transient signal is generated after the upstream end signal acquisition equipment samples the pressure of the upstream end of the target pipeline, and the downstream end pressure transient signal is generated after the downstream end signal acquisition equipment samples the pressure of the downstream end of the target pipeline;
Determining a leakage attenuation rate of a first harmonic signal, a leakage attenuation rate of a second harmonic signal and a leakage attenuation rate of a third harmonic signal in the upstream end pressure transient signal; the leakage attenuation rate of the first harmonic signal in the upstream end pressure transient signal is as follows: subtracting the attenuation rate of the first harmonic signal in the upstream end pressure transient signal when the target pipeline is free of leakage from the attenuation rate of the first harmonic signal in the upstream end pressure transient signal; the leakage attenuation rate of the second harmonic signal in the upstream end pressure transient signal is as follows: subtracting the attenuation rate of the second harmonic signal in the upstream end pressure transient signal when no leakage exists in the target pipeline from the attenuation rate of the second harmonic signal in the upstream end pressure transient signal; the leakage attenuation rate of the third harmonic signal in the upstream end pressure transient signal is as follows: subtracting the attenuation rate of the third harmonic signal in the upstream end pressure transient signal when no leakage exists in the target pipeline from the attenuation rate of the third harmonic signal in the upstream end pressure transient signal; when the target pipeline is free from leakage, the attenuation rate of each subharmonic signal in the upstream end pressure transient signal is only related to the friction coefficient of the inner wall of the target pipeline;
Determining a leakage attenuation rate of a first harmonic signal, a leakage attenuation rate of a second harmonic signal and a leakage attenuation rate of a third harmonic signal in the downstream end pressure transient signal; the leakage attenuation rate of the first harmonic signal in the downstream end pressure transient signal is as follows: subtracting the attenuation rate of the first harmonic signal in the downstream end pressure transient signal when the target pipeline is free of leakage from the attenuation rate of the first harmonic signal in the downstream end pressure transient signal; the leakage attenuation rate of the second harmonic signal in the downstream end pressure transient signal is as follows: subtracting the attenuation rate of the second harmonic signal in the downstream end pressure transient signal when the target pipeline is free of leakage from the attenuation rate of the second harmonic signal in the downstream end pressure transient signal; the leakage attenuation rate of the third harmonic signal in the downstream end pressure transient signal is as follows: subtracting the attenuation rate of the third harmonic signal in the downstream end pressure transient signal when the target pipeline is free of leakage from the attenuation rate of the third harmonic signal in the downstream end pressure transient signal; when the target pipeline is free from leakage, the attenuation rate of each subharmonic signal in the downstream end pressure transient signal is only related to the friction coefficient of the inner wall of the target pipeline;
If it is determined that the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the upstream end pressure transient signal are all greater than the corresponding upstream end leakage attenuation rate threshold values, and it is determined that the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the downstream end pressure transient signal are all greater than the corresponding downstream end leakage attenuation rate threshold values, it is determined that the target pipeline leaks;
The location of the leak point in the target pipe is determined based on the leakage decay rate of at least one harmonic signal in the upstream end pressure transient signal or the leakage decay rate of at least one harmonic signal in the downstream end pressure transient signal.
2. The method of pipe leak detection of claim 1, further comprising:
And if it is determined that at least one of the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the upstream end pressure transient signal is not greater than the corresponding upstream end leakage attenuation rate threshold value, or at least one of the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the downstream end pressure transient signal is not greater than the corresponding downstream end leakage attenuation rate threshold value, determining that no leakage occurs in the target pipeline.
3. The pipe leak detection method of claim 1, wherein determining the location of the leak point in the target pipe based on the leak decay rate of at least one harmonic signal in the upstream end pressure transient signal and the leak decay rate of at least one harmonic signal in the downstream end pressure transient signal comprises:
And determining the position of the leakage point in the target pipeline based on the length of the target pipeline and the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the upstream end pressure transient signal or the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the downstream end pressure transient signal.
4. A pipe leakage detecting method according to any one of claims 1 to 3, wherein,
The length of the target pipeline is greater than or equal to 15 km.
5. A pipe leakage detection device for performing the pipe leakage detection method according to any one of the preceding claims 1-4, the pipe leakage detection device being integrated in a signal processing apparatus in a pipe leakage detection system, the pipe leakage detection system further comprising: an upstream end signal acquisition device and an opening control device positioned at an upstream end of a target pipeline, and a downstream end signal acquisition device positioned at a downstream end of the target pipeline, wherein the upstream end signal acquisition device, the opening control device and the downstream end signal acquisition device are all in communication connection with the signal processing device, and fluid in the target pipeline flows from the upstream end of the target pipeline to the downstream end of the target pipeline; the device comprises:
an opening control module for controlling a flow opening of the fluid in the target pipeline by the opening control device;
The system comprises an acquisition module, a target pipeline and a target pipeline, wherein the acquisition module is used for acquiring an upstream end pressure transient signal and a downstream end pressure transient signal, the upstream end pressure transient signal is generated after the upstream end signal acquisition equipment samples the pressure of the upstream end of the target pipeline, and the downstream end pressure transient signal is generated after the downstream end signal acquisition equipment samples the pressure of the downstream end of the target pipeline;
The leakage determination module is used for determining that the target pipeline leaks if the leakage attenuation rate of at least one harmonic signal in the upstream end pressure transient signal is determined to be greater than the corresponding upstream end leakage attenuation rate threshold value, and the leakage attenuation rate of at least one harmonic signal in the downstream end pressure transient signal is determined to be greater than the corresponding downstream end leakage attenuation rate threshold value;
a dew point position determining module for determining a position of a leak point in the target pipe based on a leak decay rate of at least one harmonic signal in the upstream end pressure transient signal or a leak decay rate of at least one harmonic signal in the downstream end pressure transient signal;
The apparatus further comprises:
An upstream end determining module for determining a leakage attenuation rate of a first harmonic signal, a leakage attenuation rate of a second harmonic signal, and a leakage attenuation rate of a third harmonic signal in the upstream end pressure transient signal;
A downstream end determining module for determining a leakage attenuation rate of a first harmonic signal, a leakage attenuation rate of a second harmonic signal, and a leakage attenuation rate of a third harmonic signal in the downstream end pressure transient signal;
The leak determination module is further configured to:
If it is determined that the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the upstream end pressure transient signal are all greater than the corresponding upstream end leakage attenuation rate threshold, and it is determined that the leakage attenuation rate of the first harmonic signal, the leakage attenuation rate of the second harmonic signal and the leakage attenuation rate of the third harmonic signal in the downstream end pressure transient signal are all greater than the corresponding downstream end leakage attenuation rate threshold, it is determined that the target pipeline leaks.
6. A computer readable storage medium having instructions stored therein which, when run on a processing assembly, cause the processing assembly to perform the pipe leak detection method of any of claims 1 to 4.
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