The Temperature Control System Based on CPLD

The paper introduced a temperature control system based on CPLD.The temperature measured by thermocouple.When being amplified,the measured temperature converted digital signal.With the measured temperature,PID controller adjusted the through time of SCR to change the heater power to control the temperature.In the system,A/D converter control and PID control algorithm are implemented on the CPLD.The system is simple and runs steadily and reliably.