Ancona A, Spagnolo V, Lugarà P M, Ferrara M
Appl Opt. 2001 Nov 20;40(33):6019-25. doi: 10.1364/ao.40.006019.
An optical sensor for real-time monitoring of laser welding based on a spectroscopic study of the optical emission of plasma plumes has been developed. The welding plasma's electron temperature was contemporarily monitored for three of the chemical species that constitute the plasma plume by use of related emission lines. The evolution of electron temperature was recorded and analyzed during several welding procedures carried out under various operating conditions. A clear correlation between the mean value and the standard deviation of the plasma's electron temperature and the quality of the welded joint has been found. We used this information to find optimal welding parameters and for real-time detection of weld defects such as crater formation, lack of penetration, weld disruptions, and seam oxidation.
基于对等离子体羽光发射的光谱研究，开发了一种用于实时监测激光焊接的光学传感器。通过使用相关发射线，同时监测构成等离子体羽的三种化学物质的焊接等离子体电子温度。在各种操作条件下进行的多次焊接过程中，记录并分析了电子温度的变化。发现等离子体电子温度的平均值和标准偏差与焊接接头质量之间存在明显的相关性。我们利用这些信息来寻找最佳焊接参数，并实时检测焊接缺陷，如缩孔形成、未焊透、焊接中断和焊缝氧化。
