Design and implementation of temperature measurement and control for a thermo gravimetric analyzer

Thermo gravimetric analyzer(TGA) has high requirements of temperature measure accuracy and control accuracy.In this paper,a temperature control system of a TGA designed,including the temperature measure program and the temperature controller.Among this system,a signal acquisition solution based on the A/D converter AD7714 is taken as the key solution of temperature measurement.The temperature controller is based on fuzzy PID control.With the functions of MCU,the system can implement the temperature thermostat,variable temperature control and so on.The experiments show that the system demonstrates excellent performance under complex conditions of advanced temperature measurement and control.