| 2. | The amplitude discrimination circuit , the filter circuit and the amplifying circuit are designed to transform ac analog signal that the eddy current sensor output to dc analog signal , thus , the dc analog signal can be received by ad converter 传感器输出的测量信号是中频的交流模拟信号,在下位机系统设计了鉴幅、滤波、放大电路将测量信号转化为模数转换器可以接受的直流信号。 |