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在角位移和线位移测量中广泛采用极板间隙可变的高频差动式电容变换器。电容器的极板接在 LC 自激振荡器的振荡电路中。然而这类变换器的输出特性(LC 自激振荡器的差频)为非线性形式Δf=f_0((1+x)~(1/2)-(1-x)~(1/2)) (1)
In the angular displacement and line displacement measurement widely used variable plate gap high-frequency differential capacitance converter. The capacitor’s plate is connected to the LC self-excited oscillator circuit. However, the output characteristics of this type of converter (the difference frequency of the LC self-excited oscillator) are in the nonlinear form Δf = f_0 ((1 + x) ~ (1/2) - (1-x) (1)