Positioning method for a visual guiding system in a laser welding machine

Tao He; Youqing Fan; Yulang Xie; Qinghua Wu

doi:10.1117/12.2035699

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10 October 2013 Positioning method for a visual guiding system in a laser welding machine

Tao He, Youqing Fan, Yulang Xie, Qinghua Wu

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Proceedings Volume 8916, Sixth International Symposium on Precision Mechanical Measurements; 89162A (2013) https://doi.org/10.1117/12.2035699
Event: Sixth International Symposium on Precision Mechanical Measurements, 2013, Guiyang, China

Abstract

Combined with the development of guiding systems in laser welding, a visual guidance based positioning method for coaxial installation with a laser welding head is researched. A system calibrating method has been researched and designed, which is to install calibration cylinder in the part fixing a machined part, and test the calibration cylinder center coordinates works calibration of the system. A localization method based on template matching and characteristics of the target image are extracted as target image for templates, guiding two localizations both coarse positioning and fine positioning. Coarse positioning can reduce the influence of other information on the target image. Fine positioning is the second location of targets on the basis of the coarse positioning, reducing the information and keeping effect information of target image characteristics. And the method of sub-pixel localization based on least square method is fixed the center position of the target.

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Tao He, Youqing Fan, Yulang Xie, and Qinghua Wu "Positioning method for a visual guiding system in a laser welding machine", Proc. SPIE 8916, Sixth International Symposium on Precision Mechanical Measurements, 89162A (10 October 2013); https://doi.org/10.1117/12.2035699

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