a temperature control system for PCR chip is designed based on self-made PCR chip for detecting cancer of the stomach in our lab.The temperature system uses Pt as resistive heater and temperature sensor.Introduces the hardware and software of the temperature control system and the experimental debugging.A constant current source is adopted to run through the Pt resistor.When temperature changes
the resistance of Pt will change accordingly
so does the voltage across Pt resistor.Through reading the voltage data
and compared with the set value
temperature control is realized by combining BANG—BANG with PID control and preset integrator.Compared with other PCR temperature control system