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.
关键词
热电偶/时间常数/高温炉/斜坡激励信号
Key words
thermocouple/time constant/high temperature furnace/ramp excitation signal
维普
万方数据