Weld pool surface temperature measurement from polarization state of thermal emission

MATHIEU, A.; AUBRETON, O.; STOLZ, C.; CONIGLIO, Nicolas

Article dans une revue avec comité de lecture

Auteur

MATHIEU, A.
103192 Laboratoire Interdisciplinaire Carnot de Bourgogne [ICB]

AUBRETON, O.
22594 Laboratoire Electronique, Informatique et Image [UMR6306] [Le2i]

STOLZ, C.
22594 Laboratoire Electronique, Informatique et Image [UMR6306] [Le2i]

CONIGLIO, Nicolas
211915 Mechanics surfaces and materials processing [MSMP]

URI

http://hdl.handle.net/10985/10822

Date

2016

Journal

Quantitative InfraRed Thermography Journal

Résumé

This paper presents a passive polarimetry method using a division of aperture optical device in order to measure the temperature distribution at the weld pool surface. Thermal emission from a hot liquid metal was investigated at a near-infrared wavelength corresponding to a blind spectral window of a helium plasma generated during gas tungsten arc welding process. The refractive index of liquid metal and the surface radiance are deduced from the polarisation state of thermal emissions. Based upon the knowledge of both characteristics, the temperature distribution can be calculated.

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