Real-time arc welding defect detection technique by means of plasma spectrum optical analysis
Real-time arc welding defect detection technique by means of plasma spectrum optical analysis
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DOI：
10.1016/j.ndteint.2005.10.004
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发表时间：
2006-07-01
影响因子：
4.2
通讯作者：
López-Higuera, JM
中科院分区：
文献类型：
--
作者：
Mirapeix, J;Cobo, A;López-Higuera, JM
本文介绍了一种用于热等离子体实时光谱分析的优化技术，并将其应用于工业焊接过程，特别是弧焊过程的监测和缺陷检测。通过子像素算法计算等离子体电子温度允许对焊缝进行在线质量评估，允许检测焊缝中发现的常见缺陷，例如由于保护气体流量不足或焊接电源电流波动导致的熔深不足而导致的氧化。所提出的技术已成功地检查在电弧焊实时监测系统，和不锈钢焊缝的实验结果也报告。(c)2005爱思唯尔有限公司保留所有权利。
An optimized technique for real-time spectral analysis of thermal plasmas, with application in the monitoring and defect detection of industrial welding processes, particularly arc-welding, is presented in this paper. The calculation of the plasma electronic temperature by means of a subpixel algorithm permits on-line quality assessment of the welds, allowing the detection of common defects to be found in the welding seam, such as oxidation due to insufficient shielding gas flux or lack of penetration caused by current fluctuations of the welding power source. The proposed technique has been successfully checked in a real-time arc-welding monitoring system, and experimental results of stainless-steel welds are also reported. (c) 2005 Elsevier Ltd. All rights reserved.