Feasibility study of imaging spectroscopy to monitor the quality of online welding
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AuthorMirapeix Serrano, Jesús María; García Allende, Pilar Beatriz; Cobo García, Adolfo; López Higuera, José Miguel
An online welding quality system based on the use of imaging spectroscopy is proposed and discussed.
Plasma optical spectroscopy has already been successfully applied in this context by establishing a direct
correlation between some spectroscopic parameters, e.g., the plasma electronic temperature and the resulting
seam quality. Given that the use of the so-called hyperspectral devices provides both spatial and
spectral information, we propose their use for the particular case of arc welding quality monitoring in an
attempt to determine whether this technique would be suitable for this industrial situation. Experimental
welding tests are presented, and the ability of the proposed solution to identify simulated defects
is proved. Detailed spatial analyses suggest that this additional dimension can be used to improve
the performance of the entire system.
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