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Proceedings Paper

Wavelet and wavelet-packet analysis of Lamb wave signatures in laser ultrasonics
Author(s): Stephen W. Kercel; Marvin B. Klein; Bruno F. Pouet
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Paper Abstract

Laser-based ultrasonic (LBU) measurement shows great promise for on-line monitoring of weld quality in tailor-welded blanks. Tailor-welded blanks are steel blanks made from plates of different thickness and/or properties butt-welded together; they are used in automobile manufacturing to provide body, frame, and closure panels. LBU uses a pulsed laser to generate the ultrasound and a continuous wave laser interferometer to detect the ultrasound at the point of interrogation to perform ultrasonic inspection. LBU enables in-process measurement since there is no sensor contact or near-contact with the workpiece. The authors are using laser-generated plate waves to propagate form one plate into the weld nugget as a means of detecting defects.

Paper Details

Date Published: 5 April 2000
PDF: 10 pages
Proc. SPIE 4056, Wavelet Applications VII, (5 April 2000); doi: 10.1117/12.381692
Show Author Affiliations
Stephen W. Kercel, Oak Ridge National Lab. (United States)
Marvin B. Klein, Lasson Technologies, Inc. (United States)
Bruno F. Pouet, Lasson Technologies, Inc. (United States)

Published in SPIE Proceedings Vol. 4056:
Wavelet Applications VII
Harold H. Szu; Martin Vetterli; William J. Campbell; James R. Buss, Editor(s)

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