用替代法完成小电容的测量，可以避免不确定因素对电容测量的影响，完成在线小电容的高精度测量。
The measurement of small capacitances by substituting method can avoid the effect of uncertain factors and achieve high precision measurement of on-line small capacitances.
电流测量探头采用自积分的罗柯夫斯基线圈，自积分电阻的电感、电容要尽可能的小，并采用同轴结构。
The Rogowski coil ranged in the same axis was used as current sensor, in which the self-integral resistance should has smaller inductance and smaller capacitance as possible.
变气隙式电容传感器具有灵敏度高、特别适用于微小位移的非接触测量，对被测系统影响小。
Variable-gapcapacitance sensor has high sensitivity, specially applying to non-contact measurement of micro displacement, and slightly affecting the system to be measured.
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