铂热电阻测温的线性化电路研究及温控技术

The Study on Linearization Circuit of Pt RTD Temperature Measurement and the Technology of Temperature Control

采用近似公式方法导出铂热电阻R_t-t特性的一次函数关系式,并对测温电路及其参数进行了设计,使输出电压与温度呈线性关系.同时介绍了温控电路的工作原理,给出了实验结果及测量误差,

Tne primary function relational expression of Rt vs. t characteristic of Pt RTD is derived by using the method of approximate formula and the parameters of the circuit for temperature measurement are designed. Thus linear relation between output voltage and temperature is established. The operational principle of the circuit for temperature measurement is introduced, also the experimental results and the measuring errors are presented.