此系统由PIC单片机作为控制核心。系统包括AD采样，PID控制，，构成闭环系统,高精度AD转换器将后端输出的电压电流信号由模拟信号量变为数字量供给单片机进行数字PlD运算 -This system consists of a PIC microcontroller as control core. System including AD sampling, PID control, a closed loop system, high precision, AD at output afte