Paper Title:
Multi-Resolution Analysis of the Acousto-Ultrasonic Testing Signal for Composite Material Detection
  Abstract

The AU technique is employed in this paper to test the specimen which is made up of composite shell and adiabatic layer; the noise in the tested signal is reduced by adaptive filtering; Multi-resolution analysis of the signal is achieved by wavelet transform. By comparing the ratio of the energy of signal in different frequency zones to the total energy, the characteristic frequency zone of the signal is gained. The characteristic frequency zone of the signal from specimen is evaluated by energy integral Stress Wave Factor (SWF). Flaws are found effectively, and the size of flaw can be evaluated qualitatively. The validity of AU test for bond quality of the structure is approved in the experiments.

  Info
Periodical
Edited by
Zhenyu Du and Bin Liu
Pages
108-112
DOI
10.4028/www.scientific.net/AMM.65.108
Citation
B. Jing, C. Ai, Y. Liu, "Multi-Resolution Analysis of the Acousto-Ultrasonic Testing Signal for Composite Material Detection", Applied Mechanics and Materials, Vol. 65, pp. 108-112, 2011
Online since
June 2011
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