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Thermographie courtes longueurs d'onde avec des caméras silicium : contribution à la modélisation radiométrique

Abstract : Within the Ecole des Mines d'Albi, the CROMeP laboratory (Centre de Recherche sur les Outillages, les Matériaux et les Procédés) develops accurate full-field temperature measurement devices based on off-the-shelf high-resolution uncooled silicon cameras, to study for instance the behavior of metallic molds between 400 and 1000°C. The advantages of using such silicon cameras to perform such measurements are recalled.
In our work, a new approach of the radiometric modeling of such a system is proposed. Firstly, a more accurate parametric model is presented, characterized by only one set of parameters, independent of the integration time. This leads to a shorter and easier camera calibration procedure and provides a system with an on-line controlled dynamic range. Secondly, the performances of the system are evaluated and improved by studying some disturbing effects. Some of these characterizations have been done in collaboration with the CIMI (Conception d'Imageurs Matriciels Intégrés) laboratory. Then CCD and CMOS cameras performances are compared with these of traditional infrared cameras.
Finally, an innovative method for 3-D shape, strain and temperature full-field measurement, using a single camera-based sensor, is presented.
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https://tel.archives-ouvertes.fr/tel-00166721
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Submitted on : Thursday, August 9, 2007 - 8:35:57 AM
Last modification on : Wednesday, June 24, 2020 - 4:18:37 PM
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  • HAL Id : tel-00166721, version 1

Citation

Yann Rotrou. Thermographie courtes longueurs d'onde avec des caméras silicium : contribution à la modélisation radiométrique. Traitement du signal et de l'image [eess.SP]. Ecole nationale superieure de l'aeronautique et de l'espace, 2006. Français. ⟨tel-00166721⟩

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