基于热敏电阻的分段测温电路设计及测温方法

Design of Segmented Temperature Measurement Circuit and Temperature Measurement Method Based on Thermistor

本文介绍了基于热敏电阻的分段测温电路设计及测温方法。该方法在分压法测电阻的基础上,增加了一路或多路采样电阻,通过单片机IO口控制这些采样电阻进行并联组合,得到不同的采样电阻阻值,从而实现热敏电阻在不同的温度段匹配最佳的采样电阻,提高热敏电阻测温的精确度。

This article introduces the design and temperature measurement method of a segmented temperature measurement circuit based on thermistors.On the basis of the partial voltage method for measuring resistance,this method adds one or more sampling resistors,and controls these sampling resistors to be combined in parallel through the IO port of the microcontroller to obtain different sampling resistor resistance values,thereby achieving the best sampling resistance matching of the thermistor in different temperature ranges and improving the accuracy of thermistor temperaturemeasurement.