CN118688300B - A nondestructive testing method and system for pipeline quality of reservoir water delivery - Google Patents
A nondestructive testing method and system for pipeline quality of reservoir water delivery Download PDFInfo
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Abstract
The invention relates to the technical field of electronic digital data processing, in particular to a pipeline quality nondestructive testing method and system for reservoir water delivery, which comprises the steps of dividing a water delivery pipeline into a plurality of sections, collecting echo signals in each section of water delivery pipeline, acquiring damage indexes of all sections of water delivery pipeline according to the difference between the echo signals of different sections of water delivery pipeline, acquiring echo signals conforming to the damage section of water delivery pipeline as reference signals according to the difference of energy intensity and damage indexes of echo signals corresponding to the damage section of water delivery pipeline, acquiring the final damage degree of the water delivery pipeline to be analyzed according to the difference between the echo signals of the section of water delivery pipeline to be analyzed and the reference signals, acquiring all damaged section of water delivery pipeline according to the final damage degree of the section of water delivery pipeline, and overhauling and maintaining the damaged section of water delivery pipeline. The invention further improves the accuracy of nondestructive testing of the water conveying pipeline.
Description
Technical Field
The invention relates to the technical field of electronic digital data processing, in particular to a nondestructive testing method and a nondestructive testing system for quality of a pipeline for reservoir water delivery.
Background
The reservoir water delivery pipeline has the main function of delivering water resources stored in the reservoir to places where the water resources are needed, and meeting the demands of people on life, agricultural irrigation or industrial production and the like. In the long-time use process of the water conveying pipeline, due to the influences of various factors such as water quality, soil environment and the like, defects such as abrasion, corrosion, cracks and the like can possibly occur, and the defects not only influence the water conveying capacity of the water conveying pipeline, but also threaten the safety of the water conveying pipeline. Therefore, the water delivery pipeline needs to be subjected to periodic nondestructive testing, overhauled and maintained in time, and the running stability and safety of the water delivery pipeline system are ensured.
In the prior art, an ultrasonic technology is generally adopted to detect the quality of the water conveying pipeline. However, when the ultrasonic detection method is used for detecting the quality of the water pipe, certain limitation exists, and the detection accuracy has larger error due to the influence of the water flow speed in the detection environment and the fact that the specific detection position of the pipe cannot be accurately detected.
Disclosure of Invention
The invention provides a nondestructive testing method and a nondestructive testing system for the quality of a pipeline for reservoir water delivery, which are used for solving the existing problems.
The invention relates to a pipeline quality nondestructive testing method and a system for reservoir water delivery, which adopts the following technical scheme:
One embodiment of the invention provides a pipeline quality nondestructive testing method for reservoir water delivery, which comprises the following steps:
Collecting echo signals of water delivery pipelines in each section;
Obtaining damage indexes of all sections of water pipelines according to differences among echo signals of the water pipelines in different sections;
obtaining a reference signal according to the fluctuation degree of the damage index of the water pipe in the nondestructive section and the energy intensity characteristic of the corresponding echo signal, and obtaining the final damage degree of the water pipe to be analyzed through the difference degree between the echo signal of the water pipe in the section to be analyzed and the reference signal;
And obtaining all damaged section water pipelines through the final damage degree of the section water pipelines, and overhauling and maintaining the damaged section water pipelines.
Preferably, the method for obtaining damage indexes of all sections of water pipelines according to differences between echo signals of the water pipelines in different sections comprises the following specific steps:
acquiring the energy intensity of echo signals, the DTW distance between any section and echo signals of other sections of water conveying pipelines, and the distance between any section and the initial positions of the water conveying pipelines of other sections;
the specific calculation expression of the damage index of the water conveying pipeline in any section is as follows:
In the formula, Represent the firstDamage index of each section of water pipe; representing the number of water delivery pipelines in all sections; Represent the first The energy intensity of echo signals of the water delivery pipelines in each section; representing the first of the water delivery pipeline The energy intensity of echo signals of the water delivery pipelines in each section; Represent the first Individual section water pipe and the firstDWT distances of echo signals of the water delivery pipelines in the sections; Represent the first Individual section water pipe and the firstThe distance between the starting positions of the water delivery pipelines in each section; Representing absolute value symbols; For describing the first Individual section water pipe and the firstDifferences of echo signals of the water delivery pipelines in the sections.
Preferably, the specific method for acquiring the energy intensity of the echo signal comprises the following steps:
The energy intensity of the echo signal is obtained through the summation of the square of the amplitude of all data points in the echo signal.
Preferably, the obtaining the reference signal according to the fluctuation degree of the damage index of the water pipe in the nondestructive section and the energy intensity characteristic of the corresponding echo signal includes the following specific steps:
obtaining damage index sequences of water pipelines in all sections;
according to the fluctuation degree of the damage indexes of the water pipe in the nondestructive section and the energy intensity characteristics of the corresponding echo signals, acquiring the reference probability parameters of the echo signals corresponding to all the damage indexes in each area in the damage index sequence, and selecting the echo signal corresponding to the damage index in the area with the largest reference probability parameter as the reference signal.
Preferably, the specific method for obtaining the damage index sequence of the water delivery pipeline in all sections comprises the following steps:
And arranging damage indexes corresponding to all the section water conveying pipelines according to the positions of the section water conveying pipelines on the whole water conveying pipeline, and marking the arranged damage indexes as a damage index sequence.
Preferably, the specific method for acquiring each region in the damage index sequence is as follows:
Construction of a one A sliding window of a size that is large,The side length of the preset sliding window is set, and the sliding step length of the preset sliding window is set as followsAnd sequentially sliding from left to right along the damage index sequence, and recording data contained in a sliding window at each position in the sliding process as a region to obtain a plurality of regions.
Preferably, the reference probability parameters of the echo signals corresponding to all the damage indexes in each region in the damage index sequence include the following specific methods:
The damaged index sequence number The specific calculation expression of the reference probability parameters of the individual regions is:
In the formula, Representing the first of the sequence of impairment indicesA reference probability parameter for each region; representing the number of regions in the sequence of impairment indices; Represent the first Standard deviation of all damage indices in each region; Represent the first Standard deviation of all damage indices in each region; Represent the first The mean of all damage indices in each region; Represent the first The mean of all damage indices in each region; Represent the first The sum of the energy intensities of the echo signals corresponding to all the damage indexes in each area; Represent the first The sum of the energy intensities of the echo signals corresponding to all the damage indexes in each area; An exponential function based on a natural constant is represented.
Preferably, the obtaining the final damage degree of the water pipe to be analyzed through the difference degree between the echo signal and the reference signal of the water pipe of the section to be analyzed comprises the following specific steps:
The energy intensity average value of the section water conveying pipeline corresponding to the reference signal is recorded as the energy intensity average value of the reference signal, and the average value of the damage index is recorded as the damage index average value of the reference signal;
acquiring damage indexes of water pipelines in any section, energy intensity of echo signals, damage index mean value of reference signals and energy intensity mean value;
the concrete calculation expression of the final damage degree of the water conveying pipeline in any section is as follows:
In the formula, Represent the firstFinal damage degree of the water pipe in each section; Represent the first Damage index of each section of water pipe; Representing a mean value of the impairment index of the reference signal; representing an energy intensity mean of the reference signal; Represent the first The energy intensity of the water delivery pipeline of each section; A linear normalization function is represented and, Describing the degree of difference between the echo signal and the reference signal of the water pipeline of the section to be analyzed.
Preferably, the method for obtaining all damaged section water pipes through the final damage degree of the section water pipes and overhauling and maintaining the damaged section water pipes comprises the following specific steps:
Presetting a damage threshold Judging the final damage degree of all the section water conveying pipelines, and if the final damage degree of any section water conveying pipeline is larger than a damage threshold value, the section water conveying pipeline belongs to the damaged section water conveying pipeline;
and arranging all the damaged section water conveying pipelines from the large to the small according to the final damage degree, and overhauling the damaged section water conveying pipelines in sequence.
The embodiment of the invention provides a pipeline quality nondestructive testing system for reservoir water delivery, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the steps of any pipeline quality nondestructive testing method for reservoir water delivery when executing the computer program.
The technical scheme has the advantages that the whole water conveying pipeline is divided into a plurality of sections, echo signals of all the section water conveying pipelines are collected, the damage indexes of the section water conveying pipelines corresponding to all the echo signals are obtained by combining the similarity and the energy intensity difference between different echo signals, the damage indexes describe the defect damage degree of each section water conveying pipeline, according to the difference of the energy intensity and the damage indexes of the echo signals corresponding to the damaged section water conveying pipelines and the damage section water conveying pipelines, the echo signals corresponding to the reference signals are searched to serve as reference signals, the reference signals represent the echo signals corresponding to the water conveying pipelines in a nondestructive state and can serve as reference signals of the echo signals of the water conveying pipelines in any section, the final damage degree of any water conveying pipeline to be analyzed is obtained through the difference between the echo signals of the section water conveying pipeline to be analyzed, the final damage degree describes the actual damage state of the section pipeline to be analyzed, and whether the section needs to be overhauled, maintained or other measures are taken. And finally, obtaining all damaged section water pipelines according to the final damage degree of the section water pipelines, and overhauling and maintaining the damaged section water pipelines. The invention improves the accuracy of the ultrasonic technology on the detection of the water pipe, and further reduces the maintenance and overhaul cost of the water pipe and the like.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the steps of a method for nondestructive testing of the quality of a conduit for water delivery from a reservoir according to the present invention.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following description refers to the specific implementation, structure, characteristics and effects of a pipeline quality nondestructive testing method and system for reservoir water delivery according to the invention, which are provided by the invention, with reference to the accompanying drawings and the preferred embodiments. In the following description, different "one embodiment" or "another embodiment" means that the embodiments are not necessarily the same. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
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.
The invention provides a pipeline quality nondestructive testing method and a pipeline quality nondestructive testing system for reservoir water delivery, which are specifically described below with reference to the accompanying drawings.
Referring to fig. 1, a flowchart of a method for nondestructive testing of the quality of a pipeline for delivering water from a reservoir according to an embodiment of the present invention is shown, the method includes the steps of:
And S001, dividing the water conveying pipeline into a plurality of sections, and collecting echo signals in the water conveying pipeline of each section.
It should be noted that the inner wall of the water pipe may be worn, corroded or cracked after long-time operation, which not only affects the water delivery capacity of the water pipe, but also causes leakage and other safety problems, so that the quality of the water pipe needs to be periodically detected and timely maintained, and the safety of the water pipe is ensured.
Specifically, in order to implement the pipeline quality nondestructive testing method for water delivery of a reservoir provided by this embodiment, firstly, an echo signal of a water delivery pipeline needs to be collected, and the specific process is as follows:
The method comprises the steps of equally dividing a water conveying pipeline into a plurality of sections, transmitting ultrasonic signals at the initial position of each section of the water conveying pipeline by using an ultrasonic sensor, collecting echo signals reflected at the transmitting position, recording position information of the corresponding water conveying pipeline when the echo signals are collected, storing the collected information and position data, and transmitting the collected information and position data to a water conveying pipeline quality analysis system through wireless transmission equipment so as to carry out subsequent detailed analysis and processing.
So far, the echo signal of each section of water conveying pipeline is obtained through the method.
And step S002, obtaining damage indexes of all the sections of water pipelines according to the difference between echo signals of the water pipelines in different sections.
When the quality of the water pipe is detected by the ultrasonic technology, if the wall of the water pipe is not worn, corroded, broken and other defects, and external influence factors (such as temperature, pressure, medium and the like) remain relatively stable, the echo signals of each section received in the detection process show higher similarity, but when the wall of the water pipe is defective, the echo signals corresponding to the defective area are obviously different from the echo signals of the normal area of the water pipe, so that the damage index of the analyzed water pipe is obtained by comparing and analyzing the differences between the echo signals of the water pipe of any section and the echo signals of the water pipes of all the remaining sections.
The method comprises the steps of acquiring the energy intensity of echo signals through the accumulation of the squares of the amplitudes of all data points in the echo signals, and acquiring the damage index of the water conveying pipeline of the section to be analyzed according to the difference of the energy intensity of the echo signals of the water conveying pipeline of the section to be analyzed and the residual water conveying pipelines of all sections and the similarity of the echo signals.
The specific calculation expression of the damage index of the water conveying pipeline of the section to be analyzed is as follows:
In the formula, Represent the firstDamage index of each section of water pipe; representing the number of water delivery pipelines in all sections; Represent the first The energy intensity of echo signals of the water delivery pipelines in each section; representing the first of the water delivery pipeline The energy intensity of echo signals of the water delivery pipelines in each section; Represent the first Individual section water pipe and the firstEcho signal DWT distances of the water delivery pipelines in the sections; Represent the first Individual section water pipe and the firstThe distance between the starting positions of the water delivery pipelines in each section; Representing absolute value symbols; For describing the first Individual section water pipe and the firstDifferences of echo signals of the water delivery pipelines in the sections.
It should be noted that the number of the substrates,Representing acquisition of the first by a DTW (DYNAMIC TIME WARPING) algorithmIndividual section water pipe and the firstThe distance between the echo signals corresponding to the water transmission pipelines in each section is compared with the similarity of the two echo signals through the distance, the smaller the distance is, the higher the similarity of the echo signals is, and in addition, the DTW algorithm is a known technology, and the embodiment is not repeated.
When the wall of the water conveying pipeline is corroded, worn and the like, the wall thickness of the water conveying pipeline is thinned or cracked, and the problems can lead to the change of physical properties of the water conveying pipeline so as to influence echo signals when ultrasonic waves propagate in the water conveying pipeline, and meanwhile, when the quality of the water conveying pipeline is detected, the water flow speed in the water conveying pipeline can influence the accuracy of the echo signals, so that errors caused by the water flow speed on the echo signals need to be eliminated.
It is further noted that byRepresent the firstIndividual section water pipe and the firstThe difference of the energy intensity of the echo signals of the water delivery pipelines in each section indicates the first step when the difference value is largerEach section and the firstThe water pipe with one of the sections may have quality problems. By passing throughRepresent the firstIndividual section water pipe and the firstThe initial difference of echo signals of the water delivery pipelines in each section is the firstEach section and the firstThe distance between the initial positions of the water pipes in each section is used as the confidence coefficient of the initial difference so as to eliminate the influence of factors such as the water flow speed in the water pipes and the external environment on the initial difference of echo signals and obtain the first differenceIndividual section water pipe and the firstFinal difference of echo signals of water delivery pipelines in each section, whenEach section and the firstThe smaller the distance between the initial positions of the individual segment water pipes, but the larger the initial difference thereof, the greater the probability that one of the two segment water pipes has a quality problem. Will be the firstThe final difference between the water conveying pipelines of each section and the water conveying pipelines of the other sections is accumulated, when the first isWhen the total difference between the echo signals of the water conveying pipelines in each section and the water conveying pipelines in other sections is larger, represent the firstThe greater the probability that a segment water pipe will have quality problems.
So far, the damage index of the water conveying pipeline in all sections is obtained through the method.
Step S003, according to the difference of the energy intensity and damage index of echo signals corresponding to the water conveying pipeline in the nondestructive section and the damaged section, acquiring the echo signals conforming to the water conveying pipeline in the nondestructive section as reference signals, and acquiring the final damage degree of the water conveying pipeline to be analyzed through the difference of the echo signals of the water conveying pipeline in the section to be analyzed and the reference signals.
When the water pipe is in a nondestructive state, the damage index value corresponding to each section of the water pipe is lower, and the integral fluctuation range is in a smaller range. Therefore, the echo signals conforming to the nondestructive water conveying pipeline are obtained according to the characteristics and are used as reference signals, the difference between the echo signals of the water conveying pipeline in the section to be analyzed and the reference signals is analyzed, and the abnormal conditions of the water conveying pipelines in different sections are obtained.
S1, acquiring echo signals which accord with the damaged section water pipeline as reference signals according to the difference of the energy intensity and the damage index of the echo signals corresponding to the damaged section water pipeline.
The method includes the steps of selecting echo signals of a plurality of sections of water conveying pipelines which accord with the lossless section as reference signals, wherein the damage indexes of the continuous plurality of the lossless section water conveying pipelines corresponding to the reference signals have small overall fluctuation and low damage index values, meanwhile, the density of the wall of the lossless section water conveying pipeline is high, the rebound degree of the wall of the water conveying pipeline to ultrasonic waves is high, therefore, the energy intensity of the echo signals of the wall of the lossless section water conveying pipeline is high, and the reference signals are obtained according to the characteristics.
Specifically, firstly, according to the positions of all the section water conveying pipelines on the whole water conveying pipeline, arranging damage indexes corresponding to all the section water conveying pipelines, and recording the arranged damage indexes as damage index sequences;
Then, construct a A sliding window of a size that is large,Setting the sliding step length of the sliding window to be the preset side length of the sliding window at the same time(In this example to,To be described, whereinAndThe value of (a) can be adjusted according to the actual situation, the hardness requirement is not made in the example), the sliding is sequentially carried out from left to right along the damaged index sequence, the data contained in the sliding window at each position in the sliding process is recorded as a region, and a plurality of regions are obtained.
And analyzing the fluctuation degree of the damage index between each region and all the rest regions of the damage index sequence and the energy intensity characteristics of the corresponding echo signals, obtaining the reference probability parameter of each region, and representing the credibility of the echo signals corresponding to the damage index in the region as the reference signals through the reference probability parameter.
The damaged index sequence numberThe specific calculation expression of the reference probability parameters of the individual regions is:
In the formula, Representing the first of the sequence of impairment indicesA reference probability parameter for each region; representing the number of regions in the sequence of impairment indices; Represent the first Standard deviation of all damage indices in each region; Represent the first Standard deviation of all damage indices in each region; Represent the first The mean of all damage indices in each region; Represent the first The mean of all damage indices in each region; Represent the first The sum of the energy intensities of the echo signals corresponding to all the damage indexes in each area; Represent the first The sum of the energy intensities of the echo signals corresponding to all the damage indexes in each area; An exponential function based on a natural constant is represented.
It should be noted that the number of the substrates,Represent the firstStandard deviation of all damage indices in each zone with the firstThe ratio of standard deviation of all damage indexes in each region is smaller, indicating the firstAll damage indices in the individual zones relative to the firstAll damage indexes in the individual areas are relatively smooth, thenThe greater the reliability of echo signals corresponding to all the damage indexes in the areas as reference signals; Represent the first Mean and first of all damage indices in each regionThe smaller the ratio of the mean value of all the damage indexes in each region, the description of the firstThe greater the reliability of echo signals corresponding to all the damage indexes in the areas as reference signals; Represent the first The sum of the energy intensities of the echo signals corresponding to the damage index contained in the respective regions is equal to the firstThe ratio of the sum of the energy intensities of all echo signals corresponding to the damage index contained in each region is larger, which indicates thatThe greater the confidence level of the echo signals corresponding to all the damage indexes in the individual areas as reference signals.
And finally, acquiring reference probability parameters of all areas in the damage index sequence, and taking echo signals corresponding to the damage index parameters contained in the area with the maximum reference probability parameters as reference signals.
Thus, the reference signal is obtained by the above method.
S2, obtaining the final damage degree of the water pipe to be analyzed through the difference between the echo signal and the reference signal of the water pipe in the section to be analyzed.
It is to be noted that the difference between the echo signal of the water pipe in the nondestructive section and the reference signal is small, and the difference between the echo signal of the water pipe in the defect section and the reference signal is large, so that the difference between the echo signal of the water pipe in the section to be analyzed and the reference signal is analyzed to obtain the final damage degree of the water pipe in different sections.
Specifically, the energy intensity average value of the section water pipeline corresponding to the reference signal is recorded as the energy intensity average value of the reference signal, and the average value of the damage index is recorded as the damage index average value of the reference signal. And obtaining the damage index of the water pipe in any section, the energy intensity of the echo signal, the damage index mean value of the reference signal and the energy intensity mean value.
The concrete calculation expression of the final damage degree of the water conveying pipeline in any section is as follows:
In the formula, Represent the firstFinal damage degree of the water pipe in each section; Represent the first Damage index of each section of water pipe; Representing a mean value of the impairment index of the reference signal; representing an energy intensity mean of the reference signal; Represent the first The energy intensity of the water delivery pipeline of each section; Representing a linear normalization function.
It should be noted that the number of the substrates,Is the firstThe ratio of the damage index of each section of water conveying pipeline to the average value of the damage index of the reference signal is larger, the higher the ratio is, the first is representedThe greater the final damage degree of the water delivery pipeline of each section; Mean value of energy intensity of reference signal The larger the energy intensity ratio of echo signals of the water delivery pipelines in each section is, the more the ratio is, the first is representedThe weaker the energy intensity of the echo signals of the water delivery pipelines in each section is, the firstThe greater the final degree of damage to the individual segment water conduits.
So far, the final damage degree of the water conveying pipelines in all sections is obtained through the method.
And S004, obtaining all damaged section water pipelines according to the final damage degree of the section water pipelines, and overhauling and maintaining the damaged section water pipelines.
It should be noted that, all damaged section water pipes in the whole water pipe are obtained according to the final damaged degree of the section water pipe, and the damaged section water pipes are overhauled in sequence.
The method comprises the steps of presetting a damage threshold value, judging the final damage degree of all the section water conveying pipelines, if the final damage degree of any section water conveying pipeline is larger than the damage threshold value, enabling the section water conveying pipelines to belong to the damaged section water conveying pipelines, arranging all the damaged section water conveying pipelines from the large to the small according to the final damage degree, and overhauling the damaged section water conveying pipelines in sequence.
It should be further noted that the damage threshold is preset empirically,The present embodiment is not particularly limited, and may be adjusted according to actual conditions.
Through the steps, the nondestructive testing method for the quality of the pipeline for water delivery of the reservoir is completed.
An embodiment of the present invention also proposes a pipeline quality nondestructive testing system for reservoir water delivery, including a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the pipeline quality nondestructive testing method for reservoir water delivery of one of steps S001 to S004 when executing the computer program.
The method comprises the steps of dividing a whole water conveying pipeline into a plurality of sections, collecting echo signals of all the section water conveying pipelines, obtaining damage indexes of the section water conveying pipelines corresponding to all the echo signals by combining similarity and energy intensity differences among different echo signals, describing the defect damage degree of each section water conveying pipeline by the damage indexes, searching for the echo signals which are consistent with the difference of the energy intensity and the damage indexes of the echo signals corresponding to the damaged section water conveying pipelines according to the lossless section, taking the echo signals as reference signals, wherein the reference signals represent the echo signals corresponding to the water conveying pipelines in a lossless state and can be used as reference signals of echo signals of water conveying pipelines of any section, obtaining the final damage degree of any water conveying pipeline to be analyzed according to the difference between the echo signals of the section water conveying pipeline to be analyzed and the reference signals, and describing the actual damage state of the section pipeline to be analyzed according to the difference of the damage degree, and determining whether the section needs overhaul, maintenance or other measures. And finally, obtaining all damaged section water pipelines according to the final damage degree of the section water pipelines, and overhauling and maintaining the damaged section water pipelines. The invention improves the accuracy of the ultrasonic technology on the detection of the water pipe, and further reduces the maintenance and overhaul cost of the water pipe and the like.
It should be noted that the number of the substrates, used in the present exampleThe model is only used for representing that the result output by the negative correlation and the constraint model is inIn the section, other models with the same purpose can be replaced in the specific implementation, and the embodiment only usesThe model is described as an example, and is not particularly limited, whereinRefers to the input of the model.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the invention, but any modifications, equivalent substitutions, improvements, etc. within the principles of the present invention should be included in the scope of the present invention.
Claims (6)
1. A method for non-destructive testing of the quality of a conduit for the delivery of water from a reservoir, the method comprising the steps of:
Collecting echo signals of water delivery pipelines in each section;
Obtaining damage indexes of all sections of water pipelines according to differences among echo signals of the water pipelines in different sections;
obtaining a reference signal according to the fluctuation degree of the damage index of the water pipe in the nondestructive section and the energy intensity characteristic of the corresponding echo signal, and obtaining the final damage degree of the water pipe to be analyzed through the difference degree between the echo signal of the water pipe in the section to be analyzed and the reference signal;
acquiring all damaged section water pipelines according to the final damage degree of the section water pipelines, and overhauling and maintaining the damaged section water pipelines;
According to the difference between echo signals of water pipelines in different sections, damage indexes of the water pipelines in all sections are obtained, and the specific method comprises the following steps:
acquiring the energy intensity of echo signals, the DTW distance between any section and echo signals of other sections of water conveying pipelines, and the distance between any section and the initial positions of the water conveying pipelines of other sections;
the specific calculation expression of the damage index of the water conveying pipeline in any section is as follows:
Wherein Y i represents damage index of the ith section of water pipeline, b represents the number of the water pipelines of all sections, N i represents energy intensity of echo signals of the ith section of water pipeline, N l represents energy intensity of echo signals of the ith section of water pipeline, DTW (i, l) represents DTW distance between the ith section of water pipeline and echo signals of the ith section of water pipeline, d (i, l) represents distance between the initial positions of the ith section of water pipeline and the ith section of water pipeline; The method is used for describing the difference of echo signals of the ith section water conveying pipeline and the ith section water conveying pipeline;
The method for acquiring the reference signal according to the fluctuation degree of the damage index of the water conveying pipeline in the nondestructive section and the energy intensity characteristic of the corresponding echo signal comprises the following specific steps:
obtaining damage index sequences of water pipelines in all sections;
acquiring reference probability parameters of echo signals corresponding to all damage indexes in each region in a damage index sequence according to the fluctuation degree of the damage indexes of the water pipe in the nondestructive section and the energy intensity characteristics of the corresponding echo signals, and selecting the echo signal corresponding to the damage index in the region with the largest reference probability parameter as the reference signal;
the reference probability parameters of echo signals corresponding to all damage indexes in each region in the damage index sequence comprise the following specific methods:
the specific calculation expression of the reference probability parameter of the r-th region in the damage index sequence is as follows:
Wherein P r represents the reference probability parameter of the r-th region in the sequence of impairment indices, z represents the number of regions in the sequence of impairment indices, σ r represents the standard deviation of all impairment indices in the r-th region, and σ y represents the standard deviation of all impairment indices in the y-th region; representing the mean of all damage indices in the r-th region; Representing the average value of all damage indexes in the y-th region, N r representing the sum of the energy intensities of the echo signals corresponding to all damage indexes in the r-th region, N y representing the sum of the energy intensities of the echo signals corresponding to all damage indexes in the y-th region, exp [ ] representing an exponential function based on a natural constant;
The final damage degree of the water pipe to be analyzed is obtained through the difference degree between the echo signal and the reference signal of the water pipe of the section to be analyzed, and the method comprises the following specific steps:
The energy intensity average value of the section water conveying pipeline corresponding to the reference signal is recorded as the energy intensity average value of the reference signal, and the average value of the damage index is recorded as the damage index average value of the reference signal;
acquiring damage indexes of water pipelines in any section, energy intensity of echo signals, damage index mean value of reference signals and energy intensity mean value;
the concrete calculation expression of the final damage degree of the water conveying pipeline in any section is as follows:
Wherein Q i represents the final damage degree of the ith section of water pipe, Y i represents the damage index of the ith section of water pipe; Representing a mean value of the impairment index of the reference signal; Represents the energy intensity mean value of the reference signal, N i represents the energy intensity of the i-th section water pipe, norm () represents the linear normalization function, Describing the degree of difference between the echo signal and the reference signal of the water pipeline of the section to be analyzed.
2. The nondestructive testing method for the quality of a water delivery pipeline of a reservoir according to claim 1, wherein the specific acquisition method of the energy intensity of the echo signal is as follows:
The energy intensity of the echo signal is obtained through the summation of the square of the amplitude of all data points in the echo signal.
3. The nondestructive testing method for the quality of a water delivery pipeline of a reservoir according to claim 1, wherein the specific acquisition method of the damage index sequence of the water delivery pipeline of all sections is as follows:
And arranging damage indexes corresponding to all the section water conveying pipelines according to the positions of the section water conveying pipelines on the whole water conveying pipeline, and marking the arranged damage indexes as a damage index sequence.
4. A method for the non-destructive testing of the quality of a pipe for the delivery of water from a reservoir according to claim 1, characterized in that each zone of said sequence of damage indices is obtained by the specific method of:
A sliding window with a size of a multiplied by a is constructed, a is the side length of a preset sliding window, meanwhile, the sliding step length of the preset sliding window is b, the sliding is sequentially carried out from left to right along the damaged index sequence, data contained in the sliding window at each position in the sliding process are recorded as a region, and a plurality of regions are obtained.
5. The nondestructive testing method for the quality of water delivery pipes of reservoirs according to claim 1, wherein the method for obtaining all damaged section water delivery pipes through the final damage degree of the section water delivery pipes and overhauling and maintaining the damaged section water delivery pipes comprises the following specific steps:
the final damage degree of all the section water conveying pipelines is judged by presetting a damage threshold T, and if the final damage degree of any section water conveying pipeline is larger than the damage threshold, the section water conveying pipeline belongs to the damaged section water conveying pipeline;
and arranging all the damaged section water conveying pipelines from the large to the small according to the final damage degree, and overhauling the damaged section water conveying pipelines in sequence.
6. A pipeline quality nondestructive testing system for reservoir water delivery comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the computer program when executed by the processor performs the steps of a pipeline quality nondestructive testing method for reservoir water delivery as claimed in any one of claims 1 to 5.
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