Time Constant Measurement System of the Thermocouple Based on High Temperature Furnace
The time constant,as an important dynamic parameter index,will directly affect the accuracy of the measurement results when the thermocouple is used for dynamic temperature measurement.Based on the test method of the dynamic performance of the relevant thermocouple,the principle of slope signal as excitation and the measure-ment error are analyzed in this paper.The time constant test system of thermocouple is constructed by using high temperature furnace,and the heat transfer environment and the generating method of slope excitation temperature signal are analyzed.The test system is used to test the time constant of type K thermocouple,and the relationship be-tween the thermocouple time constant and temperature under different furnace temperature is given.
thermocoupletime constanthigh temperature furnaceramp excitation signal
万方数据
维普
