CD4052失调电流对自动气象站采集器温度测量的影响

温度的高精度测量一直是自动气象站采集器的关键技术.多路选择器CD4052在采集器温度测量电路设计中广泛使用,但其失调电流及其温度特性对采集器温度测量的影响一直缺乏研究.针对多路选择器CD4052存在较大失调电流问题,研究了采集器在实现对温度传感器PT100温度采集时的误差.结果表明:CD4052失调电流对采集器的温度测量误差影响较大,且误差大小与环境温度有很大关系.研究结果对数据采集器的研制及补偿提供了理论依据和工程应用价值.

CD4052 offset current impact analysis for automatic weather station temperature measurement

The high-precise measurement of temperature is always the important technology of automatic weather station (AWS) design.Multiplexer CD4052 is widely used in data acquisition unit (DAU) design,which is a most important part of AWS.Until now,there is still a lack in research on the impact of offset current and temperature characteristics of CD4052 in temperature measurement.This paper focuses on the impact of CD4052 offset current for temperature measurement.Study results show that the offset current has important influence on temperature measurement error,and the error is significantly correlated with environmental temperature.The results are valuable in theoretical basis and engineering application for design and offset of DAU.