Journal
CIRP ANNALS-MANUFACTURING TECHNOLOGY
Volume 68, Issue 1, Pages 225-228Publisher
ELSEVIER
DOI: 10.1016/j.cirp.2019.04.117
Keywords
Laser welding; Temperature; Hyperspectral imaging
Funding
- Erlangen Graduate School in Advanced Optical Technologies (SAOT) by the German Research Foundation (DFG) of the German excellence initiative
- German Research Foundation (DFG) [SCHM 2115/56-1]
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Hyperspectral imaging (HSI) is a very promising technique for temperature determination in laser welding without the need for a priori knowledge of the emissivity. HSI is commonly considered a technique that allows to simultaneously acquire spatial as well as spectral information - that is essentially containing the temperature information - upon the investigated object. For that purpose, we developed a suitable HSI-system comprising a self-designed HSI-lens system and a high-speed CMOS-camera. In the present paper we address influences upon the HSI-based temperature determination and present as well as discuss temperature determination results in laser welding of metal sheets. (C) 2019 Published by Elsevier Ltd on behalf of CIRP.
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