1 April 2003 Thermographic nondestructive evaluation: overview of recent progress
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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.
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Clemente Ibarra-Castanedo, Clemente Ibarra-Castanedo, Francois Galmiche, Francois Galmiche, Akbar Darabi, Akbar Darabi, Mariacristina Pilla, Mariacristina Pilla, Matthieu Klein, Matthieu Klein, Adel Ziadi, Adel Ziadi, Steve Vallerand, Steve Vallerand, Jean-François Pelletier, Jean-François Pelletier, Xavier P. Maldague, Xavier P. Maldague, "Thermographic nondestructive evaluation: overview of recent progress", Proc. SPIE 5073, Thermosense XXV, (1 April 2003); doi: 10.1117/12.485699; https://doi.org/10.1117/12.485699

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