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28 January 2009 Vision detection of weld pool shape parameters and numerical simulation
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Abstract
An active vision sensing system which established by low power laser and common CCD is used to shoot GTAW welding pool images. Based on choose the appropriate LASER and filters, projected angle of laser and shoot angle of CCD, we avoid the disturbance of arc effectively and obtain clear images of the welding pool. The shape parameters of welding pool can obtain by demarcated and calculated. And then a three-dimentional numerical model of GTAW welding pool is established based on the theories of fluid dynamics and heat transfer. It considered the convection heat transfer of liquid metal and heat conduction of solid metal. And FLUENT software is used for simulate the GTAW welding pool. Extract the weld pool shape parameters and done comparative study with the vision detection of pool. This will be beneficial to avoid repeat experiments and improve work efficiency.
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Youzhi Yuan, Nansheng Liu, Yanfeng Wang, Wei Luo, and Xiaorui Liu "Vision detection of weld pool shape parameters and numerical simulation", Proc. SPIE 7156, 2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments, 71562Y (28 January 2009); https://doi.org/10.1117/12.811503
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