一、概述许多研究工作已经确定,将温度直接转换成频率及温度转换成频率/时间,或者将温度转换成电压,然后转换成频率,就可以使温度测量线路中的热敏电阻线性化。在一定的工作范围内,这些方法获得了好的精度,但是它们的线性度受到限制。本文提出的方法能克服这种缺点。二、方法的提出将函数R_t(θ)加在热敏电阻R_t(θ)上,R_t(θ)定义为R_t(θ)=Aesp(θ/B)(1)式中A和B为常数;θ是在任意瞬刻t的温度。这两个函数的和给出了线性函数,即R_f(θ)+R_t(θ)=R_1(θ)(2)其中 I. Overview Many studies have determined that converting a temperature directly to frequency and temperature to frequency / time or converting temperature to voltage and then to frequency can linearize the thermistor in the temperature measurement circuit. These methods achieve good accuracy over a certain range of work, but their linearity is limited. The method proposed in this paper can overcome this shortcoming. Second, the method proposed R_t (θ) added to the thermistor R_t (θ), R_t (θ) is defined as R_t (θ) = Aesp (θ / B) (1) where A and B are constant; θ is the temperature at any instant t. The sum of these two functions gives a linear function, R_f (θ) + R_t (θ) = R_1 (θ) (2) where