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Sensors 2009, 9(4), 2851-2861; doi:10.3390/s90402851

A Weld Defects Detection System Based on a Spectrometer

Automation and Control Group, University of Brasilia, Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Mecânica, Brasília – DF, CEP: 70910-900, Brazil
* Author to whom correspondence should be addressed.
Received: 17 March 2009 / Revised: 7 April 2009 / Accepted: 20 April 2009 / Published: 21 April 2009
(This article belongs to the Section Chemical Sensors)
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Improved product quality and production methods, and decreased production costs are important objectives of industries. Welding processes are part of this goal. There are many studies about monitoring and controlling welding process. This work presents a non-intrusive on-line monitoriment system and some algorithms capable of detecting GTAW weld defects. Some experiments were made to simulate weld defects by disturbing the electric arc. The data comes from a spectrometer which captures perturbations on the electric arc by the radiation emission of chosen lines. Algorithms based on change detection methods are used to indicate the presence and localization of those defects.
Keywords: GTAW; change detection; spectroscopy GTAW; change detection; spectroscopy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Bebiano, D.; Alfaro, S.C.A. A Weld Defects Detection System Based on a Spectrometer. Sensors 2009, 9, 2851-2861.

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