The plasma cloud charge sensor was applied to detect the status of keyhole molten pool during pulsed plasma arc welding, furthermore, the detected signals were studied.

将等离子云传感器应用于脉冲等离子弧焊穿孔熔池小孔状态检测，并对检测信号的波形特征做了深入研究。

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A non power supply probe was developed to detect the plasma cloud voltage, which consists of plasma arc voltage gradient and plasma sheath voltage.

文中采用无源探针对由等离子弧梯度电压和等离子鞘层电压构成的等离子反翘(等离子云)电压进行检测。

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Methods: Electrochemical technique was adopted to detect the changes of anode polarization curves of TA2 and TC4 after welding with laser or pulsed tungsten argon arc.

方法：采用动电位极化技术，分别测定激光焊接及脉冲氩弧焊接TA2和TC4后，材料阳极极化曲线的变化。

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