A method, system, device and storage medium for monitoring health status of a pipeline network

Abstract

The present invention discloses a pipeline health status monitoring method, system, equipment and storage medium, S1, generating an excitation signal according to the historical characteristics of pipeline vibration and sound; S2, the upstream of the pipeline sends the excitation signal in S1; S3, the downstream of the pipeline receives the excitation signal; S4, extracting the time-frequency domain characteristics of the excitation signal; S5, judging the pipeline health status according to the historical characteristic parameters and the measured characteristic parameters. It can conveniently realize the monitoring of pipeline health status.

Description

Technical Field

[0001] The present invention belongs to the field of pipe network monitoring, and relates to a pipe network health status monitoring method, system, equipment and storage medium. Background Art

[0002] Urban buried pipelines are very important to the operation of the city and are called the "lifeline" of the city. Among them, the water supply network provides residents with domestic water and is an important infrastructure. However, due to external damage, pipeline material and construction quality, and pipeline aging, the water supply network may suffer from corrosion, leakage, or damage. Leakage in the water supply network not only causes waste of water resources and economic losses, but also causes pollution of domestic water. When the leakage is large, it will also cause soil loss near the leakage hole, posing a threat to the safety of surrounding roads and buildings. Therefore, it is necessary to monitor the health status of the water supply network pipelines, detect corrosion or damage to the pipeline network as early as possible, and prevent pipeline leakage.

[0003] Existing technologies use ultrasonic, electromagnetic or in-pipe robot detection methods to check pipe wall corrosion and damage, which requires contact with the pipe wall or intrusion into the pipe. However, most water supply pipes in cities are buried underground, and the detection equipment can only be placed in inspection wells, which makes many detection methods difficult to implement in actual pipe network monitoring. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a pipeline network health status monitoring method, system, equipment and storage medium, which can conveniently realize the monitoring of pipeline health status.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for monitoring the health status of a pipeline network includes the following steps:

[0007] S1, generates an excitation signal based on the historical characteristics of pipeline vibration and sound;

[0008] S2, the upstream of the pipeline sends the excitation signal in S1;

[0009] S3, the downstream of the pipeline receives the excitation signal;

[0010] S4, extracting the time-frequency domain features of the sampled excitation signal;

[0011] S5, judging the pipeline health status based on the historical characteristic parameters and the measured characteristic parameters.

[0012] Preferably, in S2, the transmitter 101 is used to send an excitation signal, and in S3, the receiver 102 is used to receive the excitation signal.

[0013] Preferably, in S2, a broadband vibration sound wave signal is applied to the pipe wall upstream of the pipeline through a voice coil motor, or a knocking sound wave signal is applied through an electromagnetic switch-type vibration source; in S3, a vibration and sound sensor is used downstream of the pipeline to collect vibration or sound wave signals.

[0014] Furthermore, in S4, for a broadband noise signal, a frequency response function between the sampled signal and the excitation signal is used as a frequency feature; for a pulse excitation signal, a transfer function in the time-frequency domain between the sampled signal and the excitation signal is used as a time-frequency domain feature.

[0015] Preferably, in S4, the upstream of the pipeline is excited by a swept frequency signal.

[0016] Furthermore, the frequency domain characteristics of the fundamental frequency and higher harmonic frequency signals are extracted through time-frequency domain filtering and used as the frequency domain characteristics of the pipeline.

[0017] Preferably, in S5, the high-dimensional frequency domain or time-frequency domain signal is reduced in dimension to obtain a score that can reflect the change of the waveguide formed by the water supply pipeline, and the pipeline health status is judged according to the score.

[0018] A pipeline network health status monitoring system, comprising:

[0019] An excitation signal generation module, used to generate an excitation signal according to the historical characteristics of pipeline vibration and sound;

[0020] An excitation signal sending module is used to send an excitation signal upstream of the pipeline;

[0021] An excitation signal receiving module, used for receiving an excitation signal downstream of the pipeline;

[0022] A time-frequency domain feature extraction module is used to extract the time-frequency domain features of the sampled excitation signal;

[0023] The pipeline health status judgment module is used to judge the pipeline health status based on historical characteristic parameters and measured characteristic parameters.

[0024] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the above-mentioned methods for monitoring the health status of a pipeline network when executing the computer program.

[0025] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the pipeline health status monitoring method as described in any one of the above items are implemented.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention only requires that an excitation signal be sent upstream of the pipeline and that the excitation signal be received downstream of the pipeline to extract the time-frequency domain characteristics of the excitation signal. Finally, the health status of the pipeline can be judged based on the historical characteristic parameters and the measured characteristic parameters. The applicable scenarios are wider. At the same time, compared with the passive method of monitoring leakage signals, the present invention uses an active excitation method to achieve monitoring, and the signal-to-noise ratio of the signal is higher, the characteristics are more obvious, and the algorithm is easier to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the installation of components of the present invention;

[0029] Figure 2 The figure is a flow chart of the pipeline network health status monitoring method of the present invention.

[0030] Among them: 101 is the transmitter, 102 is the detection machine, 103 is the host computer, 04 is the inspection well, 105 is the pipeline, and 106 is the surface. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0034] like Figure 1 As shown, the transmitter 101 and the receiver 102 are respectively installed at two positions of the pipe wall, which can be two inspection wells 104 of the pipeline, and are respectively connected to the host computer 103 through wireless communication. The host computer 103 is set on the ground surface 106.

[0035] The transmitter 101 is connected to the pipeline through a coupling fixture; the receiver 102 is connected to the pipeline through a coupling fixture.

[0036] like Figure 2 As shown, the pipeline network health status monitoring method of the present invention comprises the following steps:

[0037] Step 1: Generate an excitation signal 2 based on the historical characteristics of the vibroacoustic system in the database;

[0038] Since the waveguide formed by the water supply pipeline has specific frequency characteristics, only the sound wave signal of a specific frequency band propagating along the pipeline carries the status information of the pipeline system. Therefore, the purpose of this step is to generate an appropriate excitation signal.

[0039] Step 2: The transmitter excites the excitation signal on the pipeline;

[0040] The transmitter 101 is connected to the pipeline through a coupling fixture, and can effectively excite the acoustic wave signal on the pipeline. The transmitter 101 communicates with the host computer 103 through a wireless network.

[0041] Step 3: The receiver collects the sound wave signal in the pipeline;

[0042] The receiver 102 is connected to the pipeline through a coupling tool to collect the acoustic wave signal in the pipeline in the inspection well. The receiver 102 communicates with the host computer 103 through a wireless network, so that the time coordinates between the excitation instruction and the received signal are synchronized.

[0043] Step 4: The host computer extracts the time-frequency domain features of the sampled signal;

[0044] After an excitation-reception test is completed, the host computer extracts the time-frequency domain characteristics of the sampled signal. Specifically, for broadband noise signals, the frequency response function between the sampled signal and the excitation signal is used as the frequency characteristic; for pulse excitation signals, the time-frequency domain transfer function between the sampled signal and the excitation signal is used as the time-frequency domain characteristic. Preferably, a swept frequency signal can be used for excitation, and the frequency domain characteristics of the fundamental frequency and higher harmonic frequency signals can be extracted by time-frequency domain filtering, and used as the frequency domain characteristics of the system.

[0045] Step 5: Evaluate pipeline health status based on historical characteristic parameters and measured characteristic parameters.

[0046] The purpose of this step is to reduce the dimension of the high-dimensional frequency domain or time-frequency domain signal to obtain a score that can reflect the change of the waveguide formed by the water supply pipe. Preferably, the dimension reduction can be achieved by using weighted summation and amplitude normalization. The score varies from 0 to 1. When the score falls within this interval, the evaluation result is normal operation; otherwise, the evaluation result is leakage.

[0047] The following is a detailed description of the above steps:

[0048] The purpose of generating the excitation signal according to the historical characteristics of the vibroacoustic system in the database is to generate an appropriate signal. During the first test, a sweep frequency signal of 30 to 3000 Hz is preferably used for excitation.

[0049] The transmitter excites the excitation signal on the pipeline, and the transmitter 101 is connected to the pipeline through a coupling fixture. The transmitter 101 uses a voice coil motor to apply a broadband vibration sound wave signal on the pipe wall, or uses an electromagnetic switch type vibration source to apply a knocking sound wave signal.

[0050] In the process of collecting the acoustic wave signal in the pipeline, the receiver 102 is in another inspection well and is connected to the pipeline through a coupling tool. The receiver 102 uses a vibroacoustic sensor to collect vibration or acoustic wave signals.

[0051] The host computer extracts the time-frequency domain features of the sampled signal. For broadband noise signals, the frequency response function between the sampled signal and the excitation signal is used as the frequency feature; for pulse excitation signals, the time-frequency domain transfer function between the sampled signal and the excitation signal is used as the time-frequency domain feature. Preferably, a swept frequency signal can be used for excitation, and the frequency domain features of the fundamental frequency and higher harmonic frequency signals can be extracted by time-frequency domain filtering, and used as the frequency domain features of the system.

[0052] The purpose of evaluating the pipeline health status based on historical characteristics and measured characteristics is to reduce the dimension of the high-dimensional frequency domain or time-frequency domain signal to obtain a score that can reflect the change of the waveguide formed by the water supply pipeline. Preferably, weighted summation and amplitude normalization can be used to achieve dimensionality reduction.

[0053] The following are device embodiments of the present invention, which can be used to perform method embodiments of the present invention. For details not disclosed in the device embodiments, please refer to the method embodiments of the present invention.

[0054] In another embodiment of the present invention, a pipeline health status monitoring system is provided, which can be used to implement the above-mentioned pipeline health status monitoring method. Specifically, the pipeline health status monitoring system includes an excitation signal generating module, an excitation signal sending module, an excitation signal receiving module, a time-frequency domain feature extraction module and a pipeline health status judgment module.

[0055] Among them, the excitation signal generation module is used to generate an excitation signal according to the historical characteristics of pipeline vibration and sound.

[0056] The excitation signal sending module is used to send an excitation signal upstream of the pipeline.

[0057] The excitation signal receiving module is used to receive the excitation signal downstream of the pipeline.

[0058] The time-frequency domain feature extraction module is used to extract the time-frequency domain features of the sampled excitation signal.

[0059] The pipeline health status judgment module is used to judge the pipeline health status based on historical characteristic parameters and measured characteristic parameters.

[0060] In yet another embodiment of the present invention, a terminal device is provided. The terminal device includes a processor and a memory, wherein the memory is used to store a computer program, the computer program includes program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, and is specifically suitable for loading and executing one or more instructions to implement corresponding method processes or corresponding functions; the processor described in the embodiment of the present invention can be used for the operation of the pipeline network health status monitoring method, including: S1, generating an excitation signal according to the historical characteristics of pipeline vibration and sound; S2, the upstream of the pipeline sends the excitation signal in S1; S3, the downstream of the pipeline receives the excitation signal; S4, extracting the time-frequency domain characteristics of the excitation signal; S5, judging the pipeline health status according to the historical characteristic parameters and the measured characteristic parameters.

[0061] In another embodiment, the present invention further provides a computer-readable storage medium (Memory), which is a memory device in a terminal device for storing programs and data. It is understandable that the computer-readable storage medium here can include both the built-in storage medium in the terminal device and the extended storage medium supported by the terminal device. The computer-readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory.

[0062] One or more instructions stored in a computer-readable storage medium can be loaded and executed by a processor to implement the corresponding steps of the pipeline health status monitoring method in the above embodiment; one or more instructions in the computer-readable storage medium are loaded by the processor and the following steps are executed: S1, generating an excitation signal according to the historical characteristics of pipeline vibration and sound; S2, the excitation signal in S1 is sent upstream of the pipeline; S3, the excitation signal is received downstream of the pipeline; S4, the time-frequency domain characteristics of the excitation signal are extracted; S5, the pipeline health status is judged according to the historical characteristic parameters and the measured characteristic parameters.

[0063] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0064] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0065] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0066] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1The steps for the functions specified in one or more boxes.

[0067] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0068] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the foregoing claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to be a waiver of such subject matter, nor should it be considered that the applicant has not considered such subject matter to be part of the disclosed inventive subject matter.

Claims

1. A method for monitoring the health status of a pipeline network, characterized in that: The process includes: S1, generates an excitation signal based on the historical characteristics of pipeline vibration and sound; S2, the upstream of the pipeline sends the excitation signal in S1; Specifically: the upstream of the pipeline is excited by a sweep frequency signal, and a transmitter (101) is used to send an excitation signal, and a broadband vibration sound wave signal is applied to the pipe wall in the form of a voice coil motor, or a knocking sound wave signal is applied by an electromagnetic switch type vibration source; S3, the downstream of the pipeline receives the excitation signal; Specifically: a receiver (102) is used to receive the excitation signal; a vibroacoustic sensor is used downstream of the pipeline to collect vibration or sound wave signals. S4, extracting the time-frequency domain features of the sampled excitation signal; Specifically: The frequency domain characteristics of the fundamental frequency and high-order harmonic frequency signals are extracted by time-frequency domain filtering and used as the frequency domain characteristics of the pipeline; for broadband noise signals, the frequency response function between the sampled signal and the excitation signal is used as the frequency characteristic; for pulse excitation signals, the time-frequency domain transfer function between the sampled signal and the excitation signal is used as the time-frequency domain characteristic S5, judging the pipeline health status based on historical characteristic parameters and measured characteristic parameters; Specifically: reduce the dimension of high-dimensional frequency domain or time-frequency domain signals to obtain a score that can reflect the changes in the waveguide formed by the water supply pipeline, and judge the health status of the pipeline based on the score.

2. A pipeline health status monitoring system based on the pipeline health status monitoring method according to claim 1, characterized in that: include: An excitation signal generation module, used to generate an excitation signal according to the historical characteristics of pipeline vibration and sound; An excitation signal sending module is used to send an excitation signal upstream of the pipeline; An excitation signal receiving module, used for receiving an excitation signal downstream of the pipeline; A time-frequency domain feature extraction module is used to extract the time-frequency domain features of the sampled excitation signal; The pipeline health status judgment module is used to judge the pipeline health status based on historical characteristic parameters and measured characteristic parameters.

3. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the pipeline network health status monitoring method as claimed in claim 1 are implemented.

4. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by the processor, the steps of the pipeline network health status monitoring method as claimed in claim 1 are implemented.

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