热敏电阻精密线性温度变换及应用

The Precise Linear Temperature Conversion of Thermistor and Its Application

本文提出用两个热敏电阻组成的分压(或分流)系数,实现温度线性变换的方法。线化直线通过绝对温度坐标原点,并在60℃温域内,达到0.01%的精确度。与目前国内外常用的由一个热敏电阻组成的各种无源或有源线化电路相比,在相同的温域内,精确度提高了约100倍。也优于直接线化的新型热敏电阻。该方法的灵敏度约为1/T。文中给出了应用实例与实验数据。

This paper advance a method for linearizing temperature conver-sion by way of two thermistors,Which form a voltage divider or current divider.The linearized straight line pass through the zero of kelvin temperature scale,accuracy comes to 0.01% in the range of 60℃.It is raised about one-hundredtimes in the same range of temperature as compared with other active orpassive linearizing circuits formed only by a single thermister widely usednowadays at home and abroad.And it is aiso better than those new types ofdirect linearizing thermistors.It has a sensibility of about 1/T.Some applicable examples and test data are given in this paper.