Transactions of Nanjing University of Aeronautics & Astronautics
Method for Detecting Weld Feature Size Based on Line Structured Light
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Abstract:
With the rapid development of the machining and manufacturing industry， welding has been widely used in forming connections of structural parts. At present， manual methods are often used for welding and quality inspection， with low efficiency and unstable product quality. Due to the requirements of visual inspection of weld feature size， a visual inspection system for weld feature size based on line structured light （LSL） is designed and built in this paper. An adaptive light stripe sub-pixel center extraction algorithm and a feature point extraction algorithm for welding light stripe are proposed. The experiment results show that the detection error of the weld width is 0.216 mm， the detection error of the remaining height is 0.035 mm， the single measurement costs 109 ms， and the inspection stability and repeatability of the system is 1%. Our approach can meet the online detection requirements of practical applications.
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Clc Number:
TP391
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