Robust sensing of arc length
Robust sensing of arc length
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DOI：
10.1109/19.930442
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发表时间：
2001-06
期刊：
影响因子：
--
通讯作者：
Pengjiu Li;Yu-Ming Zhang
中科院分区：
文献类型：
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作者：
Pengjiu Li;Yu-Ming Zhang
在弧焊过程中，电弧作为热剂加热和熔化工件。在给定焊接电流的情况下，弧长决定了热流的分布和强度。弧长的测量和控制在机器人和自动化焊接操作中是基本的。焊接电弧的长度决定了电弧能量的分布，从而决定了焊缝的热输入和宽度。本工作旨在利用特定波长的弧光光谱来提高气体保护钨极气体保护焊(GTAW)的弧长测量精度。为此，研究了焊接参数对光谱分布的影响。为了验证母材和弧长的影响，还对弧柱进行了水平采样作为光谱分析的层。结果表明，Ar原子的谱线由弧长决定，与焊接参数无关，与电流无关。基于这些发现，设计了一种紧凑型弧光传感器，以足够的精度测量弧长。利用该传感器研制了弧长闭环控制系统。
During arc welding, the arc heats and melts the workpiece as heat flux. When the welding current is given, the distribution and the intensity of the heat flux are determined by the length of the are. The measurement and control of the are length are fundamental in robotic and automated welding operations. Length of welding arc determines the distribution of the arc energy and thus the heat input and width of the weld. This work aims at improving the measurement accuracy of arc length using the spectrum of are light at a particular wavelength during gas tungsten arc welding (GTAW) with argon shield. To this end, effects of welding parameters on spectral distributions were studied. To verify the effects of base metal and arc length, the arc column was also sampled horizontally as Layers for spectral analysis. Results show that spectral lines of argon atoms are determined by are length, independent of welding parameters other than the current. Based on these findings, a compact arc light sensor has been designed to measure the arc length with adequate accuracy. A closed-loop arc length control system has been developed with the proposed sensor.