铠装K型热电偶动态响应误差补偿研究

提出了一种利用同一可高频调制的高功率C02激光器发出的连续激光和脉冲激光作为激励热源，在同一系统中进行辐射温度计（红外探测器）静态校准和被校表面温度传感器动态校准的新方法，由于高速辐射温度计的频率响应特性优于被校温度传感器，因此以前者的响应作为真值来校准后者并获取系统误差的修正值，避免了因传感器安装环境差异及热物性的变化所产生的误差，解决了表面温度传感器动态校准的溯源难题。利用该方法对K型热电偶进行了动态校准实验，建立了数学模型，获得了该热电偶的频率特性和动态性能指标，对该传感器的动态特性进行补偿。

Research on dynamic error compensation for an armored K type thermocouple

A new method was proposed, in which a high-power CO2 laser modulated by high frequency was used as the driv- ing source to heat up a surface-temperature sensor. The continual beam and the pulsed beam sent out by the same laser could be used in the same system to carry on the static calibration of the radiation thermometer and the dynamic calibration of the temperature sensor to be checked. The frequency-response characteristics of high-speed radiation thermometer surpassed that of the temperature sensor, therefore it could be used as the reference value to calibrate the latter and let system error be cor- rected. Differences in the environment of the sensor installing and the error caused by the change of thermo-physical proper- ty could be avoided. Thus, the difficult problem of traceable dynamic calibration of temperature was solved. In experiment, to obtain the frequency characteristics of the thermocouple and the dynamic performance of the K type thermocouple, which could compensate the dynamic characteristics of the sensor, the sensor was dynamically corrected by using the method, and then the mathematical model was established.