Nondestructive testing of satellite structures during their assembly by infrared stimulated thermography

Denis G. F. David; Herve Rolland Tretout; J. Y. Marin; Antonio Perez; A. Delpet; Jean Michel Desmarres

doi:10.1117/12.171163

21 March 1994 Nondestructive testing of satellite structures during their assembly by infrared stimulated thermography

Denis G. F. David, Herve Rolland Tretout, J. Y. Marin, Antonio Perez, A. Delpet, Jean Michel Desmarres

Proceedings Volume 2245, Thermosense XVI: An International Conference on Thermal Sensing and Imaging Diagnostic Applications; (1994) https://doi.org/10.1117/12.171163
Event: SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, 1994, Orlando, FL, United States

Abstract

The feasibility of nondestructive testing (NDT) by IR stimulated thermography of satellite structures during their assembly has been evaluated. After a comprehensive bibliography has been collected and analyzed, a comparison between calculated theoretical signals and experimental thermograms obtained on composite samples has been achieved, leading to good results and confirming the limits of the method. Then, a mock-up representative of the satellite structure complexity has been designed and manufactured. An original heating system has been developed, while a fast acquisition system has been adapted to several conventional IR cameras. The feasibility was demonstrated through a large number of trials during which several parameters such as heater and camera locations, level of illumination, camera wavelength range, etc., were systematically changed. By using conventional image processing, and more specific data processing techniques, the threshold of defect detection has been decreased and the analysis of thermal images sequences has been facilitated. The identification of all environmental conditions interfering with this NDT method is underway; it will lead to effective instructions for the NDT of satellite structures by IR stimulated thermography.

Citation Download Citation

Denis G. F. David, Herve Rolland Tretout, J. Y. Marin, Antonio Perez, A. Delpet, and Jean Michel Desmarres "Nondestructive testing of satellite structures during their assembly by infrared stimulated thermography", Proc. SPIE 2245, Thermosense XVI: An International Conference on Thermal Sensing and Imaging Diagnostic Applications, (21 March 1994); https://doi.org/10.1117/12.171163

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KEYWORDS

Thermography

Nondestructive evaluation

Satellites

Cameras

Infrared imaging

Infrared radiation

Inspection

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