为解决热电偶时间常数常规标定方法周期长、成本高、无法在线标定的问题,介绍了一种基于回路电流阶跃响应(Loop Current Step Response,LCSR)的热电偶时间常数原位在线标定方法(简称"LCSR法"),重点阐述了LCSR法的基本原理和标定方法,开展了实验室环境下热风洞法与LCSR法时间常数实验对比研究,实验表明:LCSR法标定周期远低于热风洞法,且时间常数标定结果基本一致.最后,探讨了温度畸变真实环境下原位在线标定的测试应用前景.
Online calibration method for time constant of fast thermocouple in dynamic temperature testing
In order to solve the problems of long cycle,high cost and inability to calibrate thermocouple time con-stants online in conventional calibration methods,an in-situ online calibration method of thermocouple time constants based on loop current step response(LCSR)was introduced,and the basic principles and calibration methods of the LCSR time constant calibration were emphatically discussed.A comparative study on the calibration of time constants using the hot air tunnel method and the LCSR method was performed in a laboratory environment.The experimental results show that the calibration period of the LCSR method is much lower than that of the hot air tunnel method,and the time constant calibration results are basically the same.Finally,the test application prospect of in-situ online calibration in the real en-vironment of temperature distortion is discussed.
万方数据
维普
