自动气象站四线制测量气温原理分析  

Analysis of four lines measuring temperature principle of automatic weather station

作　　者：吴奇生[1] 窦炜明[1] 芮斌[1] 

机构地区：[1]安徽省大气探测技术保障中心,合肥230031

出　　处：《气象水文海洋仪器》2008年第3期35-36,共2页Meteorological,Hydrological and Marine Instruments

摘　　要：采用四线制测量气温是目前投入业务运行的自动气象站产品普遍方法,本文在给出自动气象站四线制测量气温原理框架图的基础上,仔细分析了恒流源电路、开关电路、放大电路和A/D变换电路等每个分电路的作用,并通过运算得出引入标准电阻进行测量的计算公式。在基于原理分析的基础上总结出采用四线制测量温度的优点和适用范围。Four lines measuring temperature is universally adopted by operational automatic weather station. The paper detaile analyses the function of constant ampere power circuit, switcher circuit, amplify and A/D transfer circuit based on principle chart. It also proves the principle and advantage of measured by standard resistor. It concludes the advantage and application area of four lines measuring temperature based on analysis of the principle.

关 键 词：恒流源 开关电路 放大A/D变换 

分 类 号：TH765.72[机械工程—仪器科学与技术]