Weld pool surface temperature measurement from polarization state of thermal emission

6533b7dbfe1ef96bd12700c7

RESEARCH PRODUCT

Weld pool surface temperature measurement from polarization state of thermal emission

Christophe Stolz Olivier Aubreton N. Coniglio Alexandre Mathieu

subject

Liquid metal Materials science Matériaux [Sciences de l'ingénieur][ INFO.INFO-TS ] Computer Science [cs]/Signal and Image Processing [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic Stokes imaging [ SPI.MAT ] Engineering Sciences [physics]/Materials 02 engineering and technology 01 natural sciences Temperature measurement Traitement du signal et de l'image [Informatique][SPI.MAT]Engineering Sciences [physics]/Materials 010309 optics Optics [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing 0103 physical sciences Thermal [ INFO.INFO-TI ] Computer Science [cs]/Image Processing weld pool temperature [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering Electrical and Electronic Engineering Instrumentation ComputingMilieux_MISCELLANEOUS polarimetry gas tungsten arc Traitement des images [Informatique]business.industry Gas tungsten arc welding [ SPI.GPROC ] Engineering Sciences [physics]/Chemical and Process Engineering 021001 nanoscience & nanotechnology Wavelength polarimetry;[INFO.INFO-TI]Computer Science [cs]/Image Processing [eess.IV]Radiance Weld pool [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic [ SPI.OPTI ] Engineering Sciences [physics]/Optics / Photonic 0210 nano-technology business Refractive index

description

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. Conseil Régional de Bourgogne

year	journal	country	edition	language
2014-07-07

https://hal.archives-ouvertes.fr/hal-01203740

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