Cognitive high speed defect detection and classification in MWIR images of laser welding

Yago L. Lapido; Jorge Rodriguez-Araújo; Antón García-Díaz; Gemma Castro; Félix Vidal; Pablo Romero; Germán Vergara

doi:10.1117/12.2177890

1 July 2015 Cognitive high speed defect detection and classification in MWIR images of laser welding

Yago L. Lapido, Jorge Rodriguez-Araújo, Antón García-Díaz, Gemma Castro, Félix Vidal, Pablo Romero, Germán Vergara

Proceedings Volume 9657, Industrial Laser Applications Symposium (ILAS 2015); 96570B (2015) https://doi.org/10.1117/12.2177890
Event: Industrial Laser Applications Symposium 2015, 2015, Kenilworth, United Kingdom

Abstract

We present a novel approach for real-time defect detection and classification in laser welding processes based on the use of uncooled PbSe image sensors working in the MWIR range. The spatial evolution of the melt pool was recorded and analyzed during several welding procedures. A machine learning approach was developed to classify welding defects. Principal components analysis (PCA) is used for dimensionality reduction of the melt pool data. This enhances classification results and enables on-line classification rates close to 1 kHz with non-optimized code prototyped in Python. These results point to the feasibility of real-time defect detection.

Citation Download Citation

Yago L. Lapido, Jorge Rodriguez-Araújo, Antón García-Díaz, Gemma Castro, Félix Vidal, Pablo Romero, and Germán Vergara "Cognitive high speed defect detection and classification in MWIR images of laser welding", Proc. SPIE 9657, Industrial Laser Applications Symposium (ILAS 2015), 96570B (1 July 2015); https://doi.org/10.1117/12.2177890

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