静电电容式位移计可对高速旋转的转轴的微小振动和偏心进行非接触测量,由于它应答时间短,能够测量高速度,所以获得了广泛的应用。附图是把位移作为静电电容来测量,使静电电容转换成电压的一个电路。将电极极板与被测物体对置,看作是两个彼此平行的平板,当施加电位时,其静电电容C_1则为: Capacitive displacement meters can detect non-contact vibration and eccentricity of high-speed rotating shafts. Due to its short response time and its ability to measure high speeds, it is widely used. The figure is a circuit that measures displacement as electrostatic capacitance and converts electrostatic capacitance into voltage. The electrode plate and the measured object opposite, as two parallel to each other flat plate, when the potential is applied, the electrostatic capacitance C_1 is: