Modal analysis of acoustic leak signal in pipelines using time-frequency analysis

It is important to analyze the propagation characteristics of guided waves in acoustic leak location in pipelines. In this paper, the acoustic leak signal is analyzed in the time-frequency domain. Based on the relation of time-frequency distribution of the acoustic leak signal and the dispersion curves of guided waves, the mode components of acoustic leak signals were obtained. The research can provide a guideline for the mode selection in pipeline leak location, and help improve the accuracy of leak location.

[1]  M. Amanda Clark,et al.  Dispersion Compensation in Acoustic Emission Pipeline Leak Location , 1997 .

[2]  Ahmad Zuri bin Sha'ameri.  Parameters definition for the windowed and smooth windowed Wigner-Ville distribution of time-varying signals , 2001, Proceedings of the Sixth International Symposium on Signal Processing and its Applications (Cat.No.01EX467).

[3]  Hyunjo Jeong,et al.  Fracture source location in thin plates using the wavelet transform of dispersive waves. , 2000, IEEE transactions on ultrasonics, ferroelectrics, and frequency control.

[4]  Min Rae Lee,et al.  Acoustic Emission Technique for Pipeline Leak Detection , 2000 .

[5]  S. V. Narasimhan,et al.  Improved Wigner-Ville distribution performance by signal decomposition and modified group delay , 2003, Signal Process..

[6]  Ahmad Zuri.  PARAMETERS DEFINITION FOR THE WINDOWED AND SMOOTH WINDOW,D WIGNER-VILLE DISTRIBUTION OF TIME-VARYING SIGNALS , 2001 .

[7]  S. V. Narasimhan,et al.  Autoregressive modeling of the Wigner-Ville distribution based on signal decomposition and modified group delay , 2004, Signal Process..

[8]  Laurence J. Jacobs,et al.  Application of the short time Fourier transform to interpret ultrasonic signals , 2000 .

[9]  Hyunjo Jeong,et al.  Analysis of plate wave propagation in anisotropic laminates using a wavelet transform , 2001 .

[10]  H. V. Fuchs,et al.  Ten years of experience with leak detection by acoustic signal analysis , 1991 .

[11]  Göran Salomonsson,et al.  The use of a filter bank and the Wigner-Ville distribution for time-frequency representation , 1999, IEEE Trans. Signal Process..

[12]  Patrick Flandrin,et al.  Improving the readability of time-frequency and time-scale representations by the reassignment method , 1995, IEEE Trans. Signal Process..

[13]  Bin Wu,et al.  A new technique for modal acoustic emission pipeline leak location with one sensor , 2004 .