设计一种PID数字调节器,该数字调节器采用 STC89C51单片机作为主控单元,采用ADC0832作为A/D转换器，具有PID调节功能,数字调节器具有预置参数、PID 参数可通过键盘调节、采用DS1602 LCD数字显示、并具有数字滤波等功能。同时，文中还给出了此PID数字调节器的硬件电路设计及软件流程和相关的调试程序等。-Design A PID digital adjusters, this digital adjusters adopts STC89C51 microcontroller as the master unit and using the ADC0832 as A/D converter, with PID adjustment function, digital adjustor preset parameters, PID parameters via keyboard adjustment, using DS1602 LCD digital display, and with digital filter, and other functions. Meanwhile, the paper also out this PID digital adjusters design of hardware circuit and software flow and relevant debugging, etc.