Title :
Ultrasonic crack detection and modelization by wavelet analysis
Author :
Lasaygues, Philippe ; Lefebvre, Jean Pierre
Author_Institution :
Lab. de Mecanique et d´´Acoust., CNRS, Marseille, France
Abstract :
Wavelet analysis has been applied as a signal processing tool for ultrasonic crack detection at an interface. The basic idea is to discriminate between signatures in the time-frequency frame, precisely in the time-scale frame. The tool is also shown to be a good one to qualify modelizations of the interaction between waves and flaws. It also allows one to reject parasitic distorted signals
Keywords :
acoustic signal processing; crack detection; interface phenomena; time-frequency analysis; ultrasonic materials testing; wavelet transforms; flaws; interface; modelization; parasitic distorted signals; signal processing tool; time-frequency frame; time-scale frame; ultrasonic crack detection; wavelet analysis; waves; Acoustic signal detection; Continuous wavelet transforms; Electromagnetic scattering; Frequency; Pulse measurements; Radar scattering; Signal analysis; Signal processing; Spectral analysis; Wavelet analysis;
Conference_Titel :
Time-Frequency and Time-Scale Analysis, 1996., Proceedings of the IEEE-SP International Symposium on
Conference_Location :
Paris
Print_ISBN :
0-7803-3512-0
DOI :
10.1109/TFSA.1996.550098
