一种锡膜热电偶的动态响应模型

Dynamic Response Model of Tin Oxide Film Thermocouple

为了提高铜-康铜锡膜热电偶温度传感器的测量精度以及灵敏性,选取铜-康铜锡膜热电偶进行一维非稳态传热分析。基于牛顿冷却定理以及傅里叶导热定律,建立了铜-康铜锡膜热电偶的动态热响应模型,对其边界条件进行综合比较,对模型进行求解并基于Simulink/Matlab进行动态仿真。通过试验验证了动态热响应模型精度。仿真预测模型简单,能够较为精确地模拟铜-康铜锡膜热电偶的热响应特性。

In order to enhance the measurement accuracy and sensitivity of the copper constantan tin oxide film thermocouple temperature sensor, the one dimension unsteady heat transfer analysis is conducted for copper constantan tin oxide film thermocouple. Based on Newton cooling theorem and Fourier law of heat conduction, the dynamic thermal response model of the copper constantan tin oxide film thermocouple is established. The boundary conditions are compared comprehensively, and the model is solved, and dynamic simulation is conducted based on Simulink/Matlab. Through experiments, the accuracy of the dynamic thermal response model is verified. The simulation model is simple and simulating the thermal response characteristics of the copper constantan tin oxide film thermocouple accurately.