China Safety Science Journal ›› 2019, Vol. 29 ›› Issue (6): 158-164.doi: 10.16265/j.cnki.issn1003-3033.2019.06.026

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Study on signal analysis technology of tank acoustic emission testing

SHEN Shuqian1,2, LI Wei1   

  1. 1 College of Mechanical Science and Engineering, Northeast Petroleum University, Daqing Heilongjiang 163318, China;
    2 Maoming Inspection Institute, Guangdong Special Equipment Inspection and Research Institute, Maoming Guangdong 525000, China
  • Received:2019-02-26 Revised:2019-04-02 Published:2020-11-02

Abstract: In order to improve the accuracy of post-test evaluation of tanks by non-expert inspectors and comprehensively analyze those common types of noise, an acoustic emission signal processing method based on wavelet analysis and pattern recognition was proposed The experiment of Q235B three-point bending sandpaper rub, rubber handle percussion and electric noise was designed, and the experimental data of new acoustic emission waveform feature analysis were collected to obtain different kinds of signal characteristics. Finally, the large sample data was cluster analyzed to distinguish different types of sound sources based on the proposed signal processing method and the new feature quantity. The results show that the proposed method can quantitatively reflect the sudden burst of acoustic emission waveforms and identify the signal type of acoustic emission; it is also found to be able to extract typical features of valid acoustic emission signals and preserve key frequency band wavelet coefficients to reconstruct waveforms, thus making it suitable for acoustic emission testing of tanks.

Key words: Q235B, acoustic emission, wavelet analysis, storage tank, cluster analysis

CLC Number: