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A novel optical air-coupled ultrasound NDE sensing technique compared with infrared thermographic NDT on impacted composite materials
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Paper Abstract

In this paper, a novel optical air-coupled ultrasound (O-ACU) technique is proposed. A wide broadband (100 KHz - 1 MHz) laser-acoustic based optical microphone worked as probe in an air-coupled ultrasound (ACU) system. The O-ACU modality was used to detect several CFRP and GFRP impacted laminates and the results were compared with the classical ACU modality. Infrared thermography, as an established reference technique, was used for the validation. Advanced image processing techniques were applied. Conclusively, O-ACU shows an obvious improvement in sensibility and resolution.

Paper Details

Date Published: 14 May 2018
PDF: 8 pages
Proc. SPIE 10661, Thermosense: Thermal Infrared Applications XL, 106610X (14 May 2018); doi: 10.1117/12.2303494
Show Author Affiliations
Hai Zhang, Univ. Laval (Canada)
Technische Univ. München (Germany)
Christian U. Grosse, Technische Univ. München (Germany)
Nicolas P. Avdelidis, Laval Univ. (Canada)
Aerospace Integration Research Ctr. (Germany)
Jan-Carl Grager, Technische Univ. München (Germany)
Siemens AG (Germany)
Stefano Sfarra, Univ. degli Studi dell'Aquila (Italy)
Tomsk Polytechnic Univ. (Russian Federation)
Clemente Ibarra-Castanedo, Univ. Laval (Canada)
Xavier P. V. Maldague, Univ. Laval (Canada)

Published in SPIE Proceedings Vol. 10661:
Thermosense: Thermal Infrared Applications XL
Douglas Burleigh; Jaap de Vries, Editor(s)

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