气压传感器信号采集与非线性校正  

Signal acquisition and nonlinear correction for atmospheric pressure transducer

作　　者：杨雷[1] 卢广建[2] 范保松[2] 

机构地区：[1]东莞理工学院,广东东莞523106 [2]河南省气象局,河南郑州450003

出　　处：《传感器技术》2005年第9期13-15,共3页Journal of Transducer Technology

摘　　要：利用电激励谐振筒式气压传感器测量气压,电激励谐振筒式气压传感器输出信号的频率与气压呈非线性关系,且与环境温度有关.通过对信号进行分频准确测量出信号的周期和频率,A/D转换测量环境温度进行温度补偿,用曲线拟合法准确计算出气压,气压测量的范围为450～1100hPa,测量误差小于0.3hPa.Electricity-indeced resonator pressure transducer is used to meaure atmospheric pressure. The output signal of electricity-indeced resonator pressure transducer is a rectangular wave. The signal＇s frequency is nonlinear with the atmospheric pressure. The realation is related to environment temperature. Using frequency divided, the signal frequency can be measured accurately. Using the A/D converter, the environment temperature is measured. Then the atmospheric pressure can be calculated accurately by means of the curve fitting and temperature compensation. The measuring range of atmospheric pressure is 450 - 1 100 hPa. The error is less than 0.3 hPa.

关 键 词：气压传感器 频率测量 温度补偿 曲线拟合 

分 类 号：TM930.12[电气工程—电力电子与电力传动]