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Sensors 2011, 11(1), 506-521; doi:10.3390/s110100506

A Laser-Based Vision System for Weld Quality Inspection

Research Center for Advanced Manufacturing, Southern Methodist University, 3101 Dyer Street, Dallas, TX 75205, USA
Author to whom correspondence should be addressed.
Received: 10 November 2010 / Revised: 9 December 2010 / Accepted: 5 January 2011 / Published: 6 January 2011
(This article belongs to the Special Issue Advanced Sensing Technology for Nondestructive Evaluation)
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Welding is a very complex process in which the final weld quality can be affected by many process parameters. In order to inspect the weld quality and detect the presence of various weld defects, different methods and systems are studied and developed. In this paper, a laser-based vision system is developed for non-destructive weld quality inspection. The vision sensor is designed based on the principle of laser triangulation. By processing the images acquired from the vision sensor, the geometrical features of the weld can be obtained. Through the visual analysis of the acquired 3D profiles of the weld, the presences as well as the positions and sizes of the weld defects can be accurately identified and therefore, the non-destructive weld quality inspection can be achieved.
Keywords: laser triangulation; non-destructive; inspection; weld quality laser triangulation; non-destructive; inspection; weld quality

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Huang, W.; Kovacevic, R. A Laser-Based Vision System for Weld Quality Inspection. Sensors 2011, 11, 506-521.

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