Precision Sensing of Arc Length in GTAW Based on Arc Light Spectrum
Precision Sensing of Arc Length in GTAW Based on Arc Light Spectrum
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DOI：
10.1115/1.1349719
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发表时间：
1999-11
期刊：
影响因子：
--
通讯作者：
P. Li;Yuming Zhang
中科院分区：
文献类型：
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作者：
P. Li;Yuming Zhang
本工作旨在利用特定波长的弧光光谱，提高钨极气体保护焊弧长测量的精度。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，与弧长以外的焊接参数无关。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。
This work aims at improving the measurement accuracy of arc length using the spectrum of arc light at a particular wavelength during gas tungsten arc welding 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 showed that spectral lines of argon atoms are determined by arc length and independent of welding parameters other than the arc length. Based on these findings, a compact arc light sensor has been designed to measure the arc length with an adequate accuracy. A closed-loop arc length control system has been developed with the proposed sensor.