Research on Cold Terminal Compensation of the Thermocouple Based on Digital Temperature Sensor
The principle of thermocouples and cold junction temperature compensation is introduced.The internal structure and characteristics of different digital temperature sensors are compared.Based on digital temperature sensors,the method of the cold terminal compensation of thermocouple using digital temperature sensors is proposed,which solves the problems of large cold junction temperature changes,non-linear and difficult processing of measurement data,weak measurement sig-nals,and digital output conversion in thermocouple temperature measurement,improves measurement accuracy,and sim-plifies temperature compensation circuits.
digital temperature sensorthermocouplecold terminal compensation
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