Arc-welding quality assurance by means of embedded fiber sensor and spectral processing combining feature selection and neural networks
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AuthorMirapeix Serrano, Jesús María; García Allende, Pilar Beatriz; Cobo García, Adolfo; Conde Portilla, Olga María; López Higuera, José Miguel
A new spectral processing technique designed for its application in the on-line detection and classification of arc-welding defects is presented in this paper. A non-invasive fiber sensor embedded within a TIG torch collects the plasma radiation originated during the welding process. The spectral information is then processed by means of two consecutive stages. A compression algorithm is first applied to the data allowing real-time analysis. The selected spectral bands are then used to feed a classification algorithm, which will be demonstrated to provide an efficient weld defect detection and classification. The results obtained with the proposed technique are compared to a similar processing scheme presented in a previous paper, giving rise to an improvement in the performance of the monitoring system.
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