气象观测用地温测量装置误差一致性电路的设计
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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 synchronized 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 temperature surveying,has the widespread application value.
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 synchronized 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 temperature surveying,has the widespread application value.
引文
[1]中国气象局《Ⅱ型自动气象站》行业技术标准[S].2000,4.
[2]王晓斐,张辉,冯艳.基于模拟比较器的高精度温度测量系统[J].仪器仪表学报,2007,28(8)(s):81-84.
[3]姜应战,李丹妮,刘金辉.基于LPC935单片机的高精度温度检测系统设计[J].计算机测量与控制,2007,15(10):1273-1275.
[4]钟小鹏,杜金榜,王跃科.大动态范围高精度AFE程控调理的经典实现方法[J].计算机测量与控制,2006,14(4):533-535.
[5]袁子龙,庄红艳.高分辨率地震数据采集系统中的低切滤波器[J].仪器仪表学报,2003,03:32-35.
[6]杜建烘.HDSL系统中的模拟前端电路[J].数字通信,1998,(1).
[2]王晓斐,张辉,冯艳.基于模拟比较器的高精度温度测量系统[J].仪器仪表学报,2007,28(8)(s):81-84.
[3]姜应战,李丹妮,刘金辉.基于LPC935单片机的高精度温度检测系统设计[J].计算机测量与控制,2007,15(10):1273-1275.
[4]钟小鹏,杜金榜,王跃科.大动态范围高精度AFE程控调理的经典实现方法[J].计算机测量与控制,2006,14(4):533-535.
[5]袁子龙,庄红艳.高分辨率地震数据采集系统中的低切滤波器[J].仪器仪表学报,2003,03:32-35.
[6]杜建烘.HDSL系统中的模拟前端电路[J].数字通信,1998,(1).
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