This paper analyses detection principle of mine methane by use of a variable current detector, a new variable current detector circuit is designed.
分析了矿井瓦斯变流检测原理，设计出一种新型的瓦斯变流检测电路。
The status of realization of variable polarity current waveform, arc stability, cathodic cleaning mechanism and keyhole detection is introduced in this paper.
介绍了国内外在实现变极性电流波形、电弧稳定性、阴极清理机理、小孔信号检测等方面的研究现状。
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