Defense and illustration of time-resolved pulsed thermography for NDE

Daniel L. Balageas

doi:10.1117/12.882967

10 May 2011 Defense and illustration of time-resolved pulsed thermography for NDE

Daniel L. Balageas

Proceedings Volume 8013, Thermosense: Thermal Infrared Applications XXXIII; 80130V (2011) https://doi.org/10.1117/12.882967
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

Pulsed thermography produces temperature rise images depending on the space variability of the optical properties of the tested sample and of the fluence of the stimulating heat flux. It is demonstrated that a simple and efficient normalization of the thermograms is possible and constitutes a drastic remedy to this weakness. This is illustrated by applications to realistic defects and configurations. The way to optimize the normalization and to define a sound reference needed for defect detection are also discussed and illustrated by the analysis of NDE experiments. After normalization, the amplitude based pulsed thermograms present strong advantages compared to phase-based thermograms, in particular their large pass-band allows the early detection/characterization of defects. The benefit of using the TSR technique is also shown, especially if used in conjunction with the early detection approach.

Citation Download Citation

Daniel L. Balageas "Defense and illustration of time-resolved pulsed thermography for NDE", Proc. SPIE 8013, Thermosense: Thermal Infrared Applications XXXIII, 80130V (10 May 2011); https://doi.org/10.1117/12.882967

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