Features of the search for leaks in pipelines of heat networks using the acoustic-emission method

Lapshin, B. M.; Ovchinnikov, A. L.; Chekalin, A. S.

doi:10.1134/s1061830911100111

Cited by 5 publications

(2 citation statements)

References 1 publication

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“…According to the acoustic emission characteristics of buried pipelines, the stress-strain relationships have been studied and obtained the undervibration response of buried pipelines [6,7]. Some research studied the positioning of highpressure pipelines based on the acoustic emission method and the characteristics of acoustic emission in the time domain and frequency domain, believing that energy attenuation could be used as a method for acoustic emission location [8][9][10][11][12]. Others analyzed the characteristics of non-metallic buried gas pipelines and proposed electromagnetic wave acoustic waves as the means of pipeline positioning and detection.…”

Section: Introductionmentioning

confidence: 99%

Vibration Characteristics and Location of Buried Gas Pipeline under the Action of Pulse Excitation

Yan,

Tian,

Meng

et al. 2023

Processes

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In this paper, the attenuation of sound waves in underground gas pipelines and the vibration characteristics of pipelines are studied, and the feasibility and effectiveness of acoustic measurement of PE pipelines are verified. In this paper, the attenuation equation of sound waves in an underground gas transmission pipeline is derived based on the propagation characteristics of gas and the vibration characteristics of the pipeline itself. In order to verify the experimental results, we conducted an experimental test on the air pipeline model and verified the feasibility and effectiveness of the acoustic measurement of the PE pipeline through the test under the action of pulse excitation. Then, we detect the background noise, design the test scheme according to the characteristics of the buried pipeline, and select the test site for field test. In the test process, we collected the test data and obtained the spectrum diagram of the test data by fast Fourier transform (FFT). By analyzing the results of the spectrogram, we find that the pulse signal can penetrate the medium composed of the pipe formation, but the amplitude of the sound will be sharply attenuated. At the same time, according to the size of the peak in the spectrum, we can determine the location of the pipe. In summary, the feasibility and effectiveness of acoustic measurement of the PE pipeline are verified through experimental tests, and attenuation equations based on acoustic wave propagation characteristics and pipeline vibration characteristics are proposed. It has important practical application value for the safety monitoring and positioning of the buried gas pipeline.

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Section: Introductionmentioning

confidence: 99%

Vibration Characteristics and Location of Buried Gas Pipeline under the Action of Pulse Excitation

Yan,

Tian,

Meng

et al. 2023

Processes

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“…A common non-destructive method of examination of small sections of water pipes is the usage of leak noise correlators. This method has a forty-year history of use in practice [6] and since it has proven itself well both with metal pipes [7] and with polymer and plastic pipes [8]. It should be noted, that the application for plastic pipes is conventionally considered a more complex task [9,10] and its effective solution normally requires non-trivial approaches to process signals [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Towards applicability of wavelet-based cross-correlation in locating leaks in steel water supply pipes

Faerman

Sharkova²,

Avramchuk³

et al. 2022

J. Phys.: Conf. Ser.

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The paper discussed the application of wavelet-based cross-correlation analysis to the processing of the leak noise signals acquired in the field. Nine recordings produced with the commercial leak noise correlator are considered in this study. All the cases are considered as classified as challenging for signal interpretation. For most of the cases, the basic correlation technique proved to be insufficient to measure the time lag with the required confidence. We implemented a wavelet cross-correlation algorithm for time lag estimation. At least in five cases out of nine, it managed to estimate time lag accurately. In three of the remaining cases, it failed. Unfortunately, due to a lack of information on field studies when records were produced, we are not able to investigate the reason of failures. We concluded that the proposed solution is practical and can be implemented in the software of leak noise correlators.

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Low-Frequency Acoustic Signals Propagation in Buried Pipelines

Ovchinnikov

Lapshin

2016

J. Phys.: Conf. Ser.

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Features of the search for leaks in pipelines of heat networks using the acoustic-emission method

Cited by 5 publications

References 1 publication

Vibration Characteristics and Location of Buried Gas Pipeline under the Action of Pulse Excitation

Vibration Characteristics and Location of Buried Gas Pipeline under the Action of Pulse Excitation

Towards applicability of wavelet-based cross-correlation in locating leaks in steel water supply pipes

Low-Frequency Acoustic Signals Propagation in Buried Pipelines

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