一种铂热电阻测温电路参数的计算方法

Algorithm of temperature measurement circuit for platinum thermistor

提出用加权最小二乘法计算一种正反馈放大电路的参数，用以线性化铂热电阻温度传感器，这种算法使用简单、计算速度快、精度高。应用此法计算的电路参数使铂热电阻在－２００℃～＋６５０℃温度范围内线性化精度达０．０５８％ＦＳＲ。

The weighted least square method is used to calculate parameters of a kind of positivefeedback amplifier circuit.This circuit linearizes platinum thermistor sensor. The algorithm ischaracterized by sirnple usefulness,speedy computation and high precision. The computed circuitparameters make the linearization precision of platinum thermistor reach 0.058%FSR in therange of-200℃～+650℃。