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Proceedings Paper

Nondestructive testing of satellite structures during their assembly by infrared stimulated thermography
Author(s): Denis G. F. David; Herve Rolland Tretout; J. Y. Marin; Antonio Perez; A. Delpet; Jean Michel Desmarres
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Paper 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.

Paper Details

Date Published: 21 March 1994
PDF: 9 pages
Proc. SPIE 2245, Thermosense XVI: An International Conference on Thermal Sensing and Imaging Diagnostic Applications, (21 March 1994); doi: 10.1117/12.171163
Show Author Affiliations
Denis G. F. David, Dassault Aviation (France)
Herve Rolland Tretout, Dassault Aviation (France)
J. Y. Marin, Dassault Aviation (France)
Antonio Perez, MATRA Defense (France)
A. Delpet, Aerospatiale (France)
Jean Michel Desmarres, CNES (France)

Published in SPIE Proceedings Vol. 2245:
Thermosense XVI: An International Conference on Thermal Sensing and Imaging Diagnostic Applications
John R. Snell, Editor(s)

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