Equivalent wave field transform applied to pulse thermography in carbon composite samples

M. Gershenson

doi:10.1117/12.2302712

14 May 2018 Equivalent wave field transform applied to pulse thermography in carbon composite samples

M. Gershenson

Proceedings Volume 10661, Thermosense: Thermal Infrared Applications XL; 106610R (2018) https://doi.org/10.1117/12.2302712
Event: SPIE Commercial + Scientific Sensing and Imaging, 2018, Orlando, FL, United States

Abstract

By using relationships between wave propagation and thermal diffusive propagation, it was shown that that one can transform from diffusive propagation into an equivalent wave field. The transformation results in sharp reflections with time delay proportional to the distance. The performance of the transform was tested on carbon composite samples using either xenon flash or incandescent quartz halogen light bulb excitations. The images are as good as any of the common techniques in use. The method can detect artificial damage locate at the depth of the 12^th carbon mats. Application of back projection was also demonstrated. The combined use of the equivalent wave field transform and back projection improves both depth and lateral resolution. The technique is very efficient in term of computational load.

Conference Presentation

Citation Download Citation

M. Gershenson "Equivalent wave field transform applied to pulse thermography in carbon composite samples", Proc. SPIE 10661, Thermosense: Thermal Infrared Applications XL, 106610R (14 May 2018); https://doi.org/10.1117/12.2302712

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