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The weld pool contains abundant information about the welding process and can thus be utilized to accurately monitor the weld penetration. This paper addresses the dynamic estimation of the weld penetration in GTAW process. A machine vision based weld pool sensing system is utilized and the 3D weld pool surface is reconstructed in real-time. Various dynamic experiments under different welding conditions...
A skilled welder determines the weld joint penetration from his/her observation on the weld pool surface during the welding process. This paper addresses the estimation of weld joint penetration (i.e. determining back-side bead width that measures the degree of the weld joint penetration in full penetration welding) using the parameterized 3D weld pool surface in gas tungsten arc welding (GTAW). To...
The volume coherence is an important parameter in the two-layer model for random forest height retrieval. Though it is "invisible" from the observation, it can be estimated from the data. Considering the argument range of the coherences for all the possible polarizations, six polarizations can be obtained for each scattering cell. The volume coherence can be estimated more reasonably and...
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