Complex domain EFastICA pipeline leakage acoustic localization technology under branch pipe flow-induced noise interference

LIU Mingyang, YANG Jin, ZHENG Wei, FAN Endong

Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (9) : 51-58.

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (9) : 51-58.

Complex domain EFastICA pipeline leakage acoustic localization technology under branch pipe flow-induced noise interference

  • LIU Mingyang, YANG Jin, ZHENG Wei, FAN Endong
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Abstract

The water supply network has a large number of branch pipes. The fluid flow state changes under the action of the branch joint, which produces a fluid noise. This branch flow-induced noise couples with the leak sound signal through the pipe wall. Aiming at the leak location under the interference of branch flow-induced noise. The proposed C-EFastICA algorithm based on EFastICA, which expanded the cost function, constraint function, and iteration rules of the instantaneous linear EFastICA technology in the time domain to the complex-valued domain. Because the algorithm can adaptively select the nonlinear function g to establish the cost function and iterative learning rules according to the generalized Gaussian characteristics of the signal, it has a higher separation precision for signal decomposition. The experiments show that the relative error of the obtained leak source signal with C-EFastICA is less than 12%, which is lower than the traditional C-FastICA algorithm.

Key words

Leak detection / branch noise / C-EFastICA / C-FastICA

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LIU Mingyang, YANG Jin, ZHENG Wei, FAN Endong. Complex domain EFastICA pipeline leakage acoustic localization technology under branch pipe flow-induced noise interference[J]. Journal of Vibration and Shock, 2022, 41(9): 51-58

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