Mathematical modelling of rotational arc sensor in GMAW and its applications to seam tracking and endpoint detection
Mathematical modelling of rotational arc sensor in GMAW and its applications to seam tracking and endpoint detection
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DOI：
10.1179/174329306x153196
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发表时间：
2006-11-01
影响因子：
3.3
通讯作者：
Na, S. J.
中科院分区：
文献类型：
--
作者：
Shi, Y. H.;Yoo, W. S.;Na, S. J.
高速旋转电弧传感是电弧焊焊缝自动跟踪过程中检测焊枪偏移量的一种重要方法。本文分析了高速旋转电弧传感的数学模型。在考虑和不考虑焊缝形状两种情况下进行了仿真。仿真结果与实验结果一致。由于焊缝轮廓的形成，焊接开始时的电流波形与焊接中间时的电流波形不同。提出了焊缝跟踪和端点检测的信号模式。实验中还发现旋转和电流变化之间存在相移。该数学模型可为电弧传感系统的解释和改进提供参考。
High speed rotational arc sensing is an important method to detect the torch deviation during automatic seam tracking of arc welding. In the present paper, a mathematic model of high speed rotational arc sensing is analysed. Simulations have been implemented in two conditions, namely considering or without considering weld bead profile. The simulation results are consistent with the experimental results. The current waveforms at the beginning of the welding are different from those at middle of the welding because of the formation of the weld bead profile. The signal patterns for seam tracking and endpoint detection are proposed. A phase shift between the rotation and the current variation is also discovered in the experiments. The mathematical model can be helpful for the interpretation and improvement of arc sensing systems.