气象观测用地温测量装置误差一致性电路的设计  

Ground Temperature Being Used for Meteorological Observation Measures Circuital Design of the Device Error Compatibility

作　　者：敖振浪[1] 林金田[1] 李源鸿[1] 

机构地区：[1]广东省大气探测技术中心,广东广州510080

出　　处：《计算机测量与控制》2008年第9期1327-1329,共3页Computer Measurement &Control

基　　金：广东省科技厅科技计划资助项目(20063050016)

摘　　要：为了保证气象观测地温的各个通道具有系统误差一致性,文章从气象观测业务入手分析地温测量误差成因;通过巧妙设计,利用模拟开关构成信号切换电路和传感器供电切换电路,以及采用统一基准电压和同一个A/D转换器等构成了误差一致性测量电路,通过对各通道的系统误差进行测试,并对测试数据进行分析比较;结果表明,通道之间测量温度时的最大误差是0.005℃,该电路能够有效地简化系统的电路结构,解决实时温度采集的同步问题,也避免了利用多个单路测量仪器进行独立测量而造成各个层次之间的系统误差;电路在地温测量中取得很好的一致性性能,具有广泛应用价值。In order to guarantee that the meteorological observation ground temperature each channel has the system error uniformity, this article obtains from the meteorological observation service to analyze the temperature surveying error origin, through the ingenious design, the use analog switch constitution signal cut electric circuit and the sensor power supply cut electric circuit, as well as used the unification voltage reference and the identical A/D Converter and so on constituted the erroneous uniformity metering circuit. Through carries on the test to the various channels＇ system error, and carries on the analysis comparison to the test data, finally indicated that between the channel surveys when the temperature the biggest error is 0. 005℃. This electric circuit can simplify system＇s circuit structure effectively, the solution real-time temperature gathering synehronized question, also avoided using many single-channel metering equipment to carry on the independent survey to create between each level the system error. The electric circuit obtains the very good uniform performance in the tern perature surveying, has the widespread application value.

关 键 词：地温测量 误差一致性 模拟开关矩阵 设计 

分 类 号：TH765.2[机械工程—仪器科学与技术]