Paper Title:
Material Damage Ultrasonic Assessment by Time-of-Flight Estimation with an Adaptive Wavelet Filter
  Abstract

In this paper, a new digital signal processing method for ultrasonic time-of-flight diffraction (TOFD) estimation is presented. This method is based on wavelet analysis using the Morlet mother wavelet and the least mean squares (LMS) filter. It is designed to remove noise and identify the echo starting point of the ultrasonic signal reflected from the tip of a crack. Both simulated data and experimental data obtained from a steel plate with a crack are used to demonstrate the performance of the proposed method. This method is especially useful when the properties of the ultrasonic crack signal are unknown and the noise is heavy.

  Info
Periodical
Materials Science Forum (Volumes 626-627)
Edited by
Dongming Guo, Jun Wang, Zhenyuan Jia, Renke Kang, Hang Gao, and Xuyue Wang
Pages
795-800
DOI
10.4028/www.scientific.net/MSF.626-627.795
Citation
H. X. Chen, M. J. Zuo, "Material Damage Ultrasonic Assessment by Time-of-Flight Estimation with an Adaptive Wavelet Filter", Materials Science Forum, Vols. 626-627, pp. 795-800, 2009
Online since
August 2009
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Price
$32.00
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