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一 前言微计算机的各种控制、测试系统一般都是把传感器的模拟信号转换为具有一定要求范围的电压信号,经过一个具有多个输入通道的模拟开关,在微处理机的控制下,经过 A/D 啭换器进行编码,在处理机中进行计算处理,最后经 D/A 系统输出直流电压(或电流、角度等)信号。但当系统涉及到交流信号的幅值、频率、相角、控制角等的输入编码和输出处理
A foreword Microcomputer control, testing systems are generally the sensor’s analog signal is converted to have a certain range of voltage signals, through a multi-input channel analog switch, under the control of the microprocessor, through the A / D converter for encoding, processing in the processor for processing, and finally by the D / A system output DC voltage (or current, angle, etc.) signal. But when the system involves the input signal encoding and output processing of the AC signal amplitude, frequency, phase angle, control angle