Study with High Precision on Three Typical Temperature Measurement Based on NTC Thermistor

Aiming at the requirement of high-precision temperature measurement,this paper presented three typical temperature measurement systems with high-precision based on NTC thermistor.Three systems are constant voltage source temperature measurement system,constant current source temperature measurement system and double-integral principle temperature measurement system.From many aspects like the system constitute,measure principle etc,carry on the analysis comparison to temperature measurement system,and point out respectively a characteristics to these three kinds.