Vision-based measurement of weld pool geometry in constant-current gas tungsten arc welding

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Vision-based measurement of weld pool geometry in constant-current gas tungsten arc welding

The common commercial charge coupled device (CCD) camera is combined with a composite light filter to form a vision sensing system of low cost. It can capture the whole image of a weld pool clearly during constant-current gas tungsten arc welding (GTAW). Based on the imageprocessing algorithm, the edges of the weld pool under different welding conditions can be extracted. Calibration is made to...

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Gas tungsten arc welding

Gas tungsten arc welding (GTAW), also known as tungsten inert gas (TIG) welding, is an arc welding process that uses a nonconsumable tungsten electrode to produce the weld. The weld area is protected from atmospheric contamination by a shielding gas (usually an inert gas such as argon), and a filler metal is normally used, though some welds, known as autogenous welds, do not require it. A const...

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Observing the weld pool and measuring its geometrical parameters are important issues for automated and robotic welding, wherein the visual detection and localization of weld pool are critical steps. Previous methods of visual measurement of weld pool usually assume that the weld pool exists in a predefined area, and its contour should be a specific geometric shape and size. Furthermore, previo...

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ژورنال

عنوان ژورنال: Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture

سال: 2003

ISSN: 0954-4054,2041-2975

DOI: 10.1243/09544050360673279