Wavelet and wavelet-packet analysis of Lamb wave signatures in laser ultrasonics

Stephen W. Kercel; Marvin B. Klein; Bruno F. Pouet

doi:10.1117/12.381692

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5 April 2000 Wavelet and wavelet-packet analysis of Lamb wave signatures in laser ultrasonics

Stephen W. Kercel, Marvin B. Klein, Bruno F. Pouet

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Proceedings Volume 4056, Wavelet Applications VII; (2000) https://doi.org/10.1117/12.381692
Event: AeroSense 2000, 2000, Orlando, FL, United States

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.

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Stephen W. Kercel, Marvin B. Klein, and Bruno F. Pouet "Wavelet and wavelet-packet analysis of Lamb wave signatures in laser ultrasonics", Proc. SPIE 4056, Wavelet Applications VII, (5 April 2000); https://doi.org/10.1117/12.381692

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