A compact arc light sensor is develOPed based on the spectroscopic study on the plasma arc.By using this sensor, information concerning the keyhole formation and keyhole collapse could been extracted.

• 在等离子弧发射光谱分析的研究基础上，研制了轻便实用的弧光传感器，采用普通光电器件和滤光镜片替代赘重昂贵的光谱分析系统，可以捕捉到表征小孔特征状态的信号。