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Proceedings Paper

Thermographic nondestructive evaluation: overview of recent progress
Author(s): Clemente Ibarra-Castanedo; Francois Galmiche; Akbar Darabi; Mariacristina Pilla; Matthieu Klein; Adel Ziadi; Steve Vallerand D.D.S.; Jean-François Pelletier; Xavier P. Maldague
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Paper Abstract

This paper presents a summary of recent research activities carried out at our laboratory in the field of Infrared Thermography for Nondestructive Evaluation (TNDE). First, we explore the latest developments in signal improvement. We describe three approaches: multiple pulse stimulation; the use of Synthetic Data for de-noising of the signal; and a new approach derived from the Fourier diffusion equation called the Differentiated Absolute Contrast method (DAC). Secondly, we examine the advances carried out in inverse solutions. We describe the use of the Wavelet Transform to manage pulsed thermographic data, and we present a summary on Neural Networks for TNDE. Finally, we look at the problem of complex geometry inspection. In this case, due to surface shape, heat variations might be incorrectly identified as flaws. We describe the Shape-from-Heating approach and we propose some potential research avenues to deal with this problem.

Paper Details

Date Published: 1 April 2003
PDF: 10 pages
Proc. SPIE 5073, Thermosense XXV, (1 April 2003); doi: 10.1117/12.485699
Show Author Affiliations
Clemente Ibarra-Castanedo, Univ. Laval (Canada)
Francois Galmiche, Univ. Laval (Canada)
Akbar Darabi, Univ. Laval (Canada)
Mariacristina Pilla, Univ. Laval (Canada)
Matthieu Klein, Univ. Laval (Canada)
Adel Ziadi, Univ. Laval (Canada)
Steve Vallerand D.D.S., Univ. Laval (Canada)
Jean-François Pelletier, Univ. Laval (Canada)
Xavier P. Maldague, Univ. Laval (Canada)


Published in SPIE Proceedings Vol. 5073:
Thermosense XXV
K. Elliott Cramer; Xavier P. Maldague, Editor(s)

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