A nondestructive testing method and system for pipeline quality of reservoir water delivery

Abstract

The present invention relates to the technical field of electronic digital data processing, and in particular to a non-destructive detection method and system for pipeline quality of water delivery in a reservoir, comprising: dividing a water delivery pipeline into several sections, collecting echo signals in the water delivery pipeline of each section; obtaining the damage index of all sections of the water delivery pipeline according to the difference between the echo signals of the water delivery pipelines in different sections; obtaining the echo signal of the water delivery pipeline in the non-destructive section as a reference signal according to the difference in energy intensity and damage index of the echo signals corresponding to the water delivery pipelines in the non-destructive section and the damaged section; obtaining the final damage degree of the water delivery pipeline to be analyzed through the difference between the echo signal of the water delivery pipeline in the section to be analyzed and the reference signal; obtaining all damaged sections of the water delivery pipeline through the final damage degree of the section water delivery pipeline, and inspecting and maintaining the damaged sections of the water delivery pipeline. The present invention further improves the accuracy of non-destructive detection of water delivery pipelines.

Description

Technical Field

[0001] The invention relates to the technical field of electronic digital data processing, and in particular to a method and system for nondestructive detection of pipeline quality for reservoir water delivery. Background Art

[0002] The main function of the reservoir water pipeline is to transport the water resources stored in the reservoir to places in need to meet the needs of people's lives, agricultural irrigation or industrial production. During the long-term use of the water pipeline, due to the influence of various factors such as water quality and soil environment, defects such as wear, corrosion and cracks may occur. These defects will not only affect the water delivery capacity of the water pipeline, but also pose a threat to its safety. Therefore, it is necessary to conduct regular non-destructive testing of the water pipeline, timely inspection and maintenance, to ensure the stability and safety of the water pipeline system.

[0003] The existing technology usually uses ultrasonic technology to detect the quality of water pipelines. However, there are certain limitations when using ultrasonic detection methods to detect the quality of water pipelines. Due to the influence of water flow velocity in the detection environment and the inability to accurately determine the specific detection position of the pipeline, there are large errors in the accuracy of the detection. Summary of the invention

[0004] The invention provides a nondestructive detection method and system for pipeline quality of reservoir water delivery, so as to solve the existing problems.

[0005] The present invention provides a nondestructive detection method and system for pipeline quality of reservoir water delivery, which adopts the following technical solutions:

[0006] An embodiment of the present invention provides a nondestructive testing method for pipeline quality of reservoir water delivery, the method comprising the following steps:

[0007] Collect echo signals from each section of the water pipeline;

[0008] According to the difference between the echo signals of the water pipelines in different sections, the damage index of the water pipelines in all sections is obtained;

[0009] According to the fluctuation degree of the damage index of the water pipeline in the intact section and the energy intensity characteristics of the corresponding echo signal, a reference signal is obtained; and the final damage degree of the water pipeline to be analyzed is obtained through the difference between the echo signal of the water pipeline in the section to be analyzed and the reference signal;

[0010] All damaged section water pipelines are obtained through the final damage extent of the section water pipelines, and the damaged section water pipelines are inspected and maintained.

[0011] Preferably, the method of obtaining the damage index of all sections of the water pipeline according to the difference between the echo signals of the water pipelines in different sections includes:

[0012] Obtain the energy intensity of the echo signal, the DTW distance between any section and other sections of the water pipeline echo signal, and the distance between any section and other sections of the water pipeline starting position;

[0013] The specific calculation expression of the damage index of any section of the water pipeline is:

[0014]

[0015] In the formula, Indicates Damage index of water pipeline in each section; Indicates the number of water pipelines in all sections; Indicates Energy intensity of echo signal of each section of water pipeline; Indicates the water pipeline Energy intensity of echo signal of each section of water pipeline; Indicates Section water pipeline and DWT distance of echo signal of water pipeline in each section; Indicates Section water pipeline and The distance from the starting point of each section of the water pipeline; Indicates the absolute value symbol; Used to describe Section water pipeline and The difference in echo signals of water pipelines in different sections.

[0016] Preferably, the specific method for obtaining the energy intensity of the echo signal is:

[0017] The energy intensity of the echo signal is obtained by accumulating the square of the amplitude of all data points in the echo signal.

[0018] Preferably, the method of obtaining the reference signal according to the fluctuation degree of the damage index of the water pipeline in the intact section and the energy intensity characteristics of the corresponding echo signal includes the following specific methods:

[0019] Obtain the damage index sequence of all sections of water pipelines;

[0020] According to the fluctuation degree of the damage index of the water pipeline in the damage-free section and the energy intensity characteristics of the corresponding echo signal, the baseline probability parameters of the echo signals corresponding to all the damage indices in each area in the damage index sequence are obtained, and the echo signal corresponding to the damage index in the area with the largest baseline probability parameter is selected as the baseline signal.

[0021] Preferably, the specific method for obtaining the damage index sequence of all sections of the water pipeline is:

[0022] The damage indexes corresponding to all the section water pipelines are arranged according to the positions of the section water pipelines on the entire water pipeline, and the arranged damage indexes are recorded as a damage index sequence.

[0023] Preferably, the specific method for obtaining each region in the damaged index sequence is:

[0024] Build a Sliding window of size, is the side length of the preset sliding window, and the sliding step length of the preset sliding window is , slide along the damaged index sequence from left to right in sequence, record the data contained in the sliding window at each position in the sliding process as a region, and obtain several regions.

[0025] Preferably, the reference probability parameters of the echo signals corresponding to all the damaged indices in each region in the damaged index sequence include the following specific methods:

[0026] The damaged index sequence The specific calculation expression of the baseline probability parameter of each region is:

[0027]

[0028] In the formula, Indicates the damaged index sequence Baseline probability parameters for each region; represents the number of regions in the damaged index sequence; Indicates The standard deviation of all damage indices in the region; Indicates The standard deviation of all damage indices in the region; Indicates The mean of all damage indices in the region; Indicates The mean of all damage indices in the region; Indicates The sum of the energy intensities of the echo signals corresponding to all the damage indices in the region; Indicates The sum of the energy intensities of the echo signals corresponding to all the damage indices in the region; Represents an exponential function with a natural constant as its base.

[0029] Preferably, the final damage degree of the water pipeline to be analyzed is obtained by the difference between the echo signal of the water pipeline in the section to be analyzed and the reference signal, and the specific method includes:

[0030] The mean value of the energy intensity of the water pipeline in the section corresponding to the reference signal is recorded as the mean value of the energy intensity of the reference signal, and the mean value of the damage index is recorded as the mean value of the damage index of the reference signal;

[0031] Obtain the damage index of any section of the water pipeline and the energy intensity of the echo signal, the mean value of the damage index and the mean value of the energy intensity of the reference signal;

[0032] The specific calculation expression for the final damage degree of any section of the water pipeline is:

[0033]

[0034] In the formula, Indicates The ultimate extent of damage to the water pipeline in each section; Indicates Damage index of water pipeline in each section; represents the mean value of the impairment index of the reference signal; represents the mean energy intensity of the reference signal; Indicates Energy intensity of each section of water pipeline; represents the linear normalization function, Describes the degree of difference between the echo signal of the water pipeline section to be analyzed and the reference signal.

[0035] Preferably, the method of obtaining all damaged section water pipelines by the final damage degree of the section water pipeline and inspecting and maintaining the damaged section water pipelines includes the following specific methods:

[0036] Preset damage threshold The final damage degree of all sections of the water pipeline is judged. If the final damage degree of any section of the water pipeline is greater than the damage threshold, the section of the water pipeline belongs to the damaged section of the water pipeline;

[0037] Arrange all damaged sections of water pipelines from largest to smallest according to the final degree of damage, and inspect and repair the damaged sections of water pipelines in turn.

[0038] An embodiment of the present invention provides a system for nondestructive testing of pipeline quality for reservoir water delivery, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the system implements any one of the steps of a method for nondestructive testing of pipeline quality for reservoir water delivery.

[0039] The beneficial effects of the technical solution of the present invention are as follows: the entire water pipeline is divided into multiple sections, and the echo signals of the water pipelines in all sections are collected; the damage index of the water pipelines in the sections corresponding to all echo signals is obtained by combining the similarity and energy intensity difference between different echo signals, and the damage index describes the degree of defect damage of the water pipelines in each section; according to the difference in energy intensity and damage index of the echo signals corresponding to the water pipelines in the intact section and the damaged section, the matching echo signal is found as the reference signal, and the reference signal represents the echo signal corresponding to the water pipeline in the intact state, which can be used as the reference signal of the echo signal of the water pipeline in any section; the final damage degree of any water pipeline to be analyzed is obtained by the difference between the echo signal of the water pipeline in the section to be analyzed and the reference signal, and the final damage degree describes the actual damage state of the pipeline in the section to be analyzed, which is used to determine whether the section needs to be repaired, maintained or take other measures. Finally, all damaged water pipelines in the sections are obtained by the final damage degree of the water pipeline in the sections, and the damaged water pipelines in the sections are repaired and maintained. The present invention improves the accuracy of ultrasonic detection of water pipes and further reduces the cost of water pipe maintenance and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 The present invention is a flowchart of the steps of a nondestructive testing method for pipeline quality used for reservoir water delivery. DETAILED DESCRIPTION

[0042] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of a non-destructive detection method and system for pipeline quality for reservoir water delivery proposed by the present invention, its specific implementation method, structure, features and effects, in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0043] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0044] The following is a detailed description of a method and system for nondestructive testing of pipeline quality for reservoir water delivery provided by the present invention in conjunction with the accompanying drawings.

[0045] See also Figure 1 , which shows a flow chart of the steps of a nondestructive testing method for pipeline quality of reservoir water delivery provided by an embodiment of the present invention, the method comprising the following steps:

[0046] Step S001: Divide the water pipeline into several sections, and collect echo signals in the water pipeline of each section.

[0047] It should be noted that after a long period of operation, the inner wall of the water pipeline may be worn, corroded or cracked, which will not only affect the water delivery capacity of the water pipeline, but also cause safety problems such as leakage. Therefore, it is necessary to regularly inspect the quality of the water pipeline and maintain it in time to ensure the safety of the water pipeline.

[0048] Specifically, in order to implement the nondestructive detection method for the quality of a pipeline for reservoir water delivery proposed in this embodiment, it is first necessary to collect the echo signal of the water delivery pipeline. The specific process is as follows:

[0049] The water pipeline is divided into several sections at equal intervals. An ultrasonic sensor is used to transmit ultrasonic signals at the starting position of each section of the water pipeline, and the echo signals reflected from the transmitting position are collected. At the same time, the corresponding water pipeline position information when the echo signal is collected is recorded. After the collected information and position data are stored, they are sent to the water pipeline quality analysis system via wireless transmission equipment for subsequent detailed analysis and processing.

[0050] So far, the echo signal of each section of the water pipeline is obtained through the above method.

[0051] Step S002: According to the differences between the echo signals of the water pipelines in different sections, the damage index of the water pipelines in all sections is obtained.

[0052] It should be noted that when using ultrasonic technology to conduct quality inspection on water pipelines, if the water pipeline wall has no defects such as wear, corrosion, and rupture, and the external influencing factors (such as temperature, pressure, medium, etc.) remain relatively stable, the echo signals received in each section during the inspection will show a high similarity; however, when there are defects in the water pipeline wall, there is a significant difference between the echo signal corresponding to the defective area and the echo signal of the normal area of ​​the water pipeline; therefore, by comparing and analyzing the difference between the echo signal of any section of the water pipeline and the echo signals of all remaining sections of the water pipeline, the damage index of the analyzed water pipeline is obtained.

[0053] Specifically, the energy intensity of the echo signal is obtained by accumulating the square of the amplitude of all data points in the echo signal; based on the difference in energy intensity between the echo signals of the water pipeline in the section to be analyzed and all remaining sections of the water pipeline, and the similarity of the echo signals, the damage index of the water pipeline in the section to be analyzed is obtained.

[0054] The specific calculation expression of the damage index of the water pipeline in the section to be analyzed is:

[0055]

[0056] In the formula, Indicates Damage index of water pipeline in each section; Indicates the number of water pipelines in all sections; Indicates Energy intensity of echo signal of each section of water pipeline; Indicates the water pipeline Energy intensity of echo signal of each section of water pipeline; Indicates Section water pipeline and DWT distance of echo signal of water pipeline in each section; Indicates Section water pipeline and The distance from the starting point of each section of the water pipeline; Indicates the absolute value symbol; Used to describe Section water pipeline and The difference in echo signals of water pipelines in different sections.

[0057] It should be noted that Indicates that the DTW (Dynamic Time Warping) algorithm is used to obtain the Section water pipeline and The distance between the echo signals corresponding to the water pipeline in each section is used to compare the similarity of the two echo signals. The smaller the distance, the higher the similarity of the echo signals. In addition, the DTW algorithm is a well-known technology and will not be described in detail in this embodiment.

[0058] It should be noted that when defects such as corrosion and wear appear on the wall of a water pipeline, the wall thickness of the water pipeline will become thinner or cracks will occur. These problems will cause changes in the physical properties of the water pipeline, thereby affecting the echo signal when the ultrasonic wave propagates inside the water pipeline; at the same time, when conducting quality inspections on the water pipeline, the water flow velocity inside it will affect the accuracy of the echo signal, so it is necessary to eliminate the error caused by the water flow velocity to the echo signal.

[0059] It should be further explained that through Indicates Section water pipeline and The energy intensity difference of the echo signal of the water pipeline in each section is greater when the difference value is larger. Sections and There may be quality problems in the water pipeline of one section. Indicates Section water pipeline and The initial difference of the echo signal of the water pipeline in each section is Sections and The distance between the initial positions of the water pipeline in each section is used as the confidence level of the initial difference to eliminate the influence of factors such as the water flow velocity in the water pipeline and the external environment on the initial difference of the echo signal, and obtain the confidence level of the initial difference. Section water pipeline and The final difference of the echo signal of the water pipeline in each section; Sections and The smaller the distance between the initial positions of the water pipelines in the two sections, but the larger the initial difference, the greater the probability that one of the two water pipelines has a quality problem. The final difference between the water pipeline of the first section and the water pipeline of the rest sections is accumulated. The greater the difference between the echo signal of the water pipeline in the first section and the overall difference between the echo signal of the water pipeline in the other sections, the greater the difference between the echo signal of the water pipeline in the first section and the overall difference between the echo signal of the water pipeline in the other sections. The greater the probability that there will be quality problems in the water pipeline in each section.

[0060] So far, the damage index of all sections of the water pipeline has been obtained through the above method.

[0061] Step S003: According to the differences in energy intensity and damage index of the echo signals corresponding to the intact section and the damaged section of the water pipeline, the echo signal of the water pipeline in the intact section is obtained as the reference signal; the final damage degree of the water pipeline to be analyzed is obtained through the difference between the echo signal of the water pipeline in the section to be analyzed and the reference signal.

[0062] It should be noted that when there are defects in the wall of the water pipeline, the damage index of the water pipeline corresponding to the defective area will be higher than the damage index of the water pipeline in the normal area; when the water pipeline is in a lossless state as a whole, the damage index value corresponding to the water pipeline in each section is low, and the overall fluctuation amplitude is within a small range. Therefore, according to the above characteristics, the echo signal that meets the requirements of the lossless water pipeline is obtained and used as the reference signal; the difference between the echo signal of the water pipeline in the section to be analyzed and the reference signal is analyzed to obtain the abnormal conditions of the water pipeline in different sections.

[0063] S1: According to the difference in energy intensity and damage index of the echo signals corresponding to the intact section and the damaged section of the water pipeline, the echo signal that conforms to the intact section of the water pipeline is obtained as a reference signal.

[0064] It should be noted that multiple echo signals of water pipelines in lossless sections are selected as reference signals. The damage index of multiple consecutive lossless sections of water pipelines corresponding to the reference signals has a small overall fluctuation and a low damage index value. At the same time, the density of the water pipeline wall in the lossless section is high, and the water pipeline wall has a high degree of ultrasonic rebound, so the energy intensity of the echo signal of the lossless water pipeline wall is high. The reference signal is obtained based on the above characteristics.

[0065] Specifically, first, according to the positions of all the water pipeline sections on the entire water pipeline, the damage indexes corresponding to all the water pipeline sections are arranged, and the arranged damage indexes are recorded as a damage index sequence;

[0066] Then, build a Sliding window of size, is the preset side length of the sliding window, and the sliding step size of the sliding window is set to , (in this example, , To narrate, and The value of can be adjusted according to the actual situation, and this example does not make a hard requirement) slides along the damaged index sequence from left to right in sequence, and the data contained in the sliding window at each position in the sliding process is recorded as a region, and several regions are obtained.

[0067] The damage index fluctuation degree between each area of ​​the damage index sequence and all remaining areas and the corresponding echo signal energy intensity characteristics are analyzed to obtain the baseline probability parameters of each area. The baseline probability parameters are used to characterize the credibility of the echo signal corresponding to the damage index in this area as a baseline signal.

[0068] The damaged index sequence The specific calculation expression of the baseline probability parameter of each region is:

[0069]

[0070] In the formula, Indicates the damaged index sequence Baseline probability parameters for each region; represents the number of regions in the damaged index sequence; Indicates The standard deviation of all damage indices in the region; Indicates The standard deviation of all damage indices in the region; Indicates The mean of all damage indices in the region; Indicates The mean of all damage indices in the region; Indicates The sum of the energy intensities of the echo signals corresponding to all the damage indices in the region; Indicates The sum of the energy intensities of the echo signals corresponding to all the damage indices in the region; Represents an exponential function with a natural constant as its base.

[0071] It should be noted that Indicates The standard deviation of all damage indices in the region is The ratio of the standard deviations of all damage indices in the region. The smaller the ratio, the All damage indices in the region are relative to the If all the damage indices in the region are relatively stable, then The greater the credibility of the echo signal corresponding to all the damage indices in the area as the reference signal; Indicates The mean of all damage indices in the region is The ratio of the mean values ​​of all damage indices in the region. The smaller the ratio, the The greater the credibility of the echo signal corresponding to all the damage indices in the area as the reference signal; Indicates The sum of the energy intensities of the echo signals corresponding to the damage index in the first region is equal to The ratio of the sum of the energy intensities of all echo signals corresponding to the damage index contained in the region. The larger the ratio, the better the The greater the credibility of the echo signal corresponding to all the damage indices in the area as a reference signal.

[0072] Finally, the reference probability parameters of all regions in the damaged index sequence are obtained, and the echo signal corresponding to the damaged index parameter contained in the region with the largest reference probability parameter is used as the reference signal.

[0073] So far, the reference signal is obtained through the above method.

[0074] S2: Obtain the final damage degree of the water pipeline to be analyzed through the difference between the echo signal of the water pipeline in the section to be analyzed and the reference signal.

[0075] It should be noted that the difference between the echo signal of the water pipeline in the intact section and the reference signal is small, and the difference between the echo signal of the water pipeline in the defective section and the reference signal is large; therefore, the difference between the echo signal and the reference signal of the water pipeline in the section to be analyzed is analyzed to obtain the final degree of damage to the water pipeline in different sections.

[0076] Specifically, the mean energy intensity of the water pipeline section corresponding to the reference signal is recorded as the reference signal energy intensity mean, and the mean damage index is recorded as the reference signal damage index mean. The damage index of any section of the water pipeline and the energy intensity of the echo signal, the damage index mean of the reference signal, and the energy intensity mean are obtained.

[0077] The specific calculation expression for the final damage degree of any section of the water pipeline is:

[0078]

[0079] In the formula, Indicates The ultimate extent of damage to the water pipeline in each section; Indicates Damage index of water pipeline in each section; represents the mean value of the impairment index of the reference signal; represents the mean energy intensity of the reference signal; Indicates Energy intensity of each section of water pipeline; represents the linear normalization function.

[0080] It should be noted that For the The ratio of the damage index of the water pipeline in each section to the average damage index of the benchmark signal. The larger the ratio, the better. The greater the ultimate damage to the water pipeline in each section; is the energy intensity mean of the reference signal and The energy intensity ratio of the echo signal of the water pipeline in each section. The larger the ratio, the stronger the energy intensity of the echo signal. The weaker the energy intensity of the echo signal of the water pipeline in each section, the The greater the final damage to the water pipeline in each section.

[0081] At this point, the final damage extent of the water pipelines in all sections is obtained through the above method.

[0082] Step S004: Obtain all damaged section water pipelines through the final damage degree of the section water pipeline, and inspect and maintain the damaged section water pipelines.

[0083] It should be noted that all damaged section water pipelines in the entire water pipeline are obtained through the final damage degree of the section water pipeline, and the damaged section water pipelines are inspected and repaired in turn.

[0084] Specifically, a damage threshold is preset to judge the final damage degree of all sections of water pipelines. If the final damage degree of any section of water pipeline is greater than the damage threshold, the section of water pipeline belongs to the damaged section of water pipeline; all damaged sections of water pipelines are arranged from large to small according to the final damage degree, and the damaged sections of water pipelines are inspected and repaired in turn.

[0085] It should be further explained that the damage threshold is preset based on experience , It can be adjusted according to actual conditions and is not specifically limited in this embodiment.

[0086] Through the above steps, a nondestructive testing method for pipeline quality used for reservoir water delivery is completed.

[0087] An embodiment of the present invention further proposes a nondestructive testing system for pipeline quality for reservoir water delivery, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, steps S001 to S004 of a nondestructive testing method for pipeline quality for reservoir water delivery are implemented.

[0088] In this embodiment, the entire water pipeline is divided into multiple sections, and the echo signals of the water pipelines in all sections are collected; the damage index of the water pipelines in the sections corresponding to all echo signals is obtained by combining the similarity and energy intensity difference between different echo signals, and the damage index describes the degree of defect damage of the water pipelines in each section; according to the difference in energy intensity and damage index of the echo signals corresponding to the water pipelines in the intact section and the damaged section, the matching echo signal is found as the reference signal, and the reference signal represents the echo signal corresponding to the water pipeline in the intact state, which can be used as the reference signal of the echo signal of the water pipeline in any section; the final damage degree of any water pipeline to be analyzed is obtained by the difference between the echo signal of the water pipeline in the section to be analyzed and the reference signal, and the final damage degree describes the actual damage state of the pipeline in the section to be analyzed, which is used to determine whether the section needs to be repaired, maintained or take other measures. Finally, all damaged water pipelines in the sections are obtained by the final damage degree of the water pipeline in the sections, and the damaged water pipelines in the sections are repaired and maintained. The present invention improves the accuracy of ultrasonic detection of water pipes and further reduces the cost of water pipe maintenance and repair.

[0089] It should be noted that the The model is only used to represent negative correlation and constrain the output of the model to be in In the specific implementation, it can be replaced by other models with the same purpose. This embodiment is only based on The model is described as an example without any specific limitation. is the input to the model.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A nondestructive testing method for pipeline quality used for reservoir water delivery, characterized in that: The method comprises the following steps: Collect echo signals from each section of the water pipeline; According to the difference between the echo signals of the water pipelines in different sections, the damage index of the water pipelines in all sections is obtained; According to the fluctuation degree of the damage index of the water pipeline in the intact section and the energy intensity characteristics of the corresponding echo signal, a reference signal is obtained; and the final damage degree of the water pipeline to be analyzed is obtained through the difference between the echo signal of the water pipeline in the section to be analyzed and the reference signal; Obtain all damaged water pipeline sections through the final damage extent of the water pipeline sections, and inspect and maintain the damaged water pipeline sections; The method of obtaining the damage index of all sections of the water pipeline according to the difference between the echo signals of the water pipelines in different sections includes: Obtain the energy intensity of the echo signal, the DTW distance between any section and other sections of the water pipeline echo signal, and the distance between any section and other sections of the water pipeline starting position; The specific calculation expression of the damage index of any section of the water pipeline is: Where Y i represents the damage index of the water pipeline in the ith section; b represents the number of water pipelines in all sections; N i represents the energy intensity of the echo signal of the water pipeline in the i-th section; N l represents the energy intensity of the echo signal of the l-th section of the water pipeline; DTW(i,l) represents the DTW distance between the echo signals of the i-th section of the water pipeline and the l-th section of the water pipeline; d(i,l) represents the distance between the starting position of the i-th section of the water pipeline and the l-th section of the water pipeline; || represents the absolute value symbol; It is used to describe the difference between the echo signals of the i-th section water pipeline and the l-th section water pipeline; The method of obtaining the reference signal according to the fluctuation degree of the damage index of the water pipeline in the intact section and the energy intensity characteristics of the corresponding echo signal includes: Obtain the damage index sequence of all sections of water pipelines; According to the fluctuation degree of the damage index of the water pipeline in the intact section and the energy intensity characteristics of the corresponding echo signal, the baseline probability parameters of the echo signals corresponding to all the damage indexes in each area in the damage index sequence are obtained, and the echo signal corresponding to the damage index in the area with the largest baseline probability parameter is selected as the baseline signal; The specific method of the baseline probability parameter of the echo signal corresponding to all the damaged indexes in each region in the damaged index sequence includes: The specific calculation expression of the baseline probability parameter of the rth region in the damaged index sequence is: Where P r represents the baseline probability parameter of the rth region in the damaged index sequence; z represents the number of regions in the damaged index sequence; σ r represents the standard deviation of all damage indices in the rth region; σ y represents the standard deviation of all damage indices in the y-th region; represents the mean of all damage indices in the rth region; represents the mean value of all damage indices in the yth region; N r represents the sum of the energy intensities of the echo signals corresponding to all the damaged indices in the rth region; N y represents the sum of the energy intensities of the echo signals corresponding to all the damaged indices in the yth region; exp[] represents an exponential function with a natural constant as the base; The method of obtaining the final damage degree of the water pipeline to be analyzed by the difference between the echo signal of the water pipeline in the section to be analyzed and the reference signal includes the following specific methods: The mean value of the energy intensity of the water pipeline in the section corresponding to the reference signal is recorded as the mean value of the energy intensity of the reference signal, and the mean value of the damage index is recorded as the mean value of the damage index of the reference signal; Obtain the damage index of any section of the water pipeline and the energy intensity of the echo signal, the mean value of the damage index and the mean value of the energy intensity of the reference signal; The specific calculation expression for the final damage degree of any section of the water pipeline is: In the formula, Q i represents the final damage degree of the water pipeline in the i-th section; Y i represents the damage index of the water pipeline in the ith section; represents the mean value of the impairment index of the reference signal; Represents the mean energy intensity of the reference signal; N i represents the energy intensity of the water pipeline in the ith section; norm() represents the linear normalization function, Describes the degree of difference between the echo signal of the water pipeline section to be analyzed and the reference signal.

2. A nondestructive testing method for pipeline quality used for reservoir water delivery according to claim 1, characterized in that: The specific method for obtaining the energy intensity of the echo signal is: The energy intensity of the echo signal is obtained by accumulating the square of the amplitude of all data points in the echo signal.

3. A nondestructive testing method for pipeline quality used for reservoir water delivery according to claim 1, characterized in that: The specific method for obtaining the damage index sequence of all sections of the water pipeline is as follows: The damage indexes corresponding to all the section water pipelines are arranged according to the positions of the section water pipelines on the entire water pipeline, and the arranged damage indexes are recorded as a damage index sequence.

4. A nondestructive testing method for pipeline quality used for reservoir water delivery according to claim 1, characterized in that: The specific method for obtaining each region in the damaged index sequence is: Construct a sliding window of size a×a, where a is the preset side length of the sliding window and the preset sliding step length of the sliding window is b. Slide along the damaged index sequence from left to right in sequence, and record the data contained in the sliding window at each position during the sliding process as a region, thereby obtaining several regions.

5. A nondestructive testing method for pipeline quality used for reservoir water delivery according to claim 1, characterized in that: The method of obtaining all damaged water pipeline sections through the final damage degree of the water pipeline sections and inspecting and maintaining the damaged water pipeline sections includes: The final damage degree of all water pipeline sections is determined by setting a preset damage threshold T. If the final damage degree of any water pipeline section is greater than the damage threshold, the water pipeline section belongs to the damaged water pipeline section. Arrange all damaged sections of water pipelines from largest to smallest according to the final degree of damage, and inspect and repair the damaged sections of water pipelines in turn.

6. A nondestructive testing system for pipeline quality of water transport in a reservoir, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the computer program is executed by the processor, the steps of the method for nondestructive testing of pipeline quality for reservoir water delivery as described in any one of claims 1 to 5 are implemented.

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