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Negative pressure wave denoising based on VMD and its application in pipeline leak location

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Abstract

When negative pressure wave (NPW) signals are used to locate pipeline leaks, noise will increase the error of location estimation. Thus, an adaptive noise reduction method based on variational mode decomposition (ANR-VMD) is proposed to improve the accuracy of leak location. First, the number of decomposition layer of VMD is optimized by the minimum information entropy. Second, the effective intrinsic mode function components are selected using the correlation coefficient. Finally, these components are reconstructed to obtain the denoised signal. In real experiments, ANR-VMD obtains a smoother pressure signal, retains the signal waveform characteristics, and identifies evident NPW inflexion point. The location accuracy of ANR-VMD for six leak points is verified. The minimum positioning error of the wavelet and EMD methods is 3.51 %, and the leakage cannot be located when the error is high. The minimum error of ANR-VMD is 0.9 %, and the maximum is 3.75 %.

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Acknowledgments

This work is supported by the Key Scientific Research Project of Xihua University (Grant No. Zl120413); the Key Laboratory of Automotive Engineering of Sichuan Province (Grant No. szjj2017-014); the Innovation Fund of Postgraduate, Xihua University (Grant No. ycjj2020111); and the Research on Accurate Location and Alarm of the Leakage Source of the Raw Water Pipeline (Grant No. 202291).

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Authors and Affiliations

  1. Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua University, Chengdu, 610039, China

    Boxiang Liu, Zhu Jiang & Wei Nie

  2. School of Energy and Power Engineering, Xihua University, Chengdu, 610039, China

    Boxiang Liu, Zhu Jiang & Wei Nie

  3. Key Laboratory of Fluid Machinery and Engineering, Sichuan Province, Xihua University, Chengdu, 610039, China

    Boxiang Liu, Zhu Jiang & Wei Nie

Authors
  1. Boxiang Liu
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  2. Zhu Jiang
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Correspondence to Zhu Jiang.

Additional information

Zhu Jiang is an Associate Professor of School of Energy and Power Engineering, Xihua University, Chengdu, China. She received her Ph.D. in the Faculty of Electronic and Information Engineering from Xi’an Jiaotong University. Her research interests include signal processing and pattern recognition.

Boxiang Liu was born in Sichuan, China. He received the B.Eng. degree from Xihua University, Chengdu, China. He is currently pursuing a Master’s degree at Xihua University. His current research interests are mechanical fault diagnosis and pipeline leak detection.

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Liu, B., Jiang, Z. & Nie, W. Negative pressure wave denoising based on VMD and its application in pipeline leak location. J Mech Sci Technol 35, 5023–5032 (2021). https://doi.org/10.1007/s12206-021-1020-3

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  • DOI: https://doi.org/10.1007/s12206-021-1020-3

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