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时间:2020-03-27
《一种基于压力敏感元件的降雨传感器.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第25卷第6期传感技术学报V01.25No.62012年6月CHINESEJOURNALOFSENSORSANDACTUATORSJun.2012TheDevelopmentofaNovelAutomaticRainfallGaugeBasedontheSensitivePressureSensorQtSuiping,WANGDongming,SUNJia,JIYah,CUITiangang(ShandongProvincialKeyLaboratoryOceanEnvironmentMonitoringTechnology;ShandongAca
2、demy0,SciencesInstituteofOceanographiclr~trumentation,QingdaoShandong266001,China)Abstract:Inordertoovercomethedisadvantagesofexistingraingaugesincludingtheobviousinaccuracywhilerainfallintensityisstrong,andtheirmeasurementrangeissmall,anovelautomaticrainfallgaugebasedonthesen
3、sitivepressuresensingcomponenthasbeendeveloped.Thehardwareofthedevelopedgaugeincludesarainfallsignaltransformerbasedonasensitivepressuresensor,aelectricalsignalprocessingunitbuiltupwithdifferentialamplifierandlineartransformcircuit,andacomputationandprocessioncentrebasedontheh
4、igherspeedandlowerpowerconsumptionembeddedprocessorARM.Thegeneralizedregressionneuralnetwork(GRNN)isappliedintheso'wareofthedevelopedgaugetorealizetheapproximationoffunction,andaaccuracymeasurementmodelhasbeenbuiltbytrainingtheGRNNwithsmalldatasample.Bymeasuringthepressureandt
5、hedurationresponsegeneratedbytherainfallonthesensitivepressuresensor,andcalculatingwiththetrainedGRNNmodel,theaccuracyrainfallcouldbeobtained.Thetestresultsshowthatthedevelopedrainfallgaugenotonlycouldbeappliedtomeasuretheheavyrain,butalsohasthemeritsofwidermeasurementrangeand
6、moreprecision.Keywords:sensortechnology;pressuresensingcomponent;rainfallgauge;generalizedregressionneuralnetworkEEACC:7230Sdoi:10.3969/j.issn.1004—1699.2012.06.009一种基于压力敏感元件的降雨传感器术漆随平,王东明,孙佳,籍艳,崔天刚(山东省海洋环境监测技术重点实验室,山东省科学院海洋仪器仪表研究所,山东青岛266001)捅要:针对已有降水传感器对强降水测量误差大、测量范围小等不足,研制了
7、一种基于压力敏感元件的雨量智能传感器。设计的传感器硬件由压力敏感元件核心的降雨物理量转换单元、以差分放大和线性处理模拟电路为主的信号处理单元、以高速低功耗嵌入式处理器ARM9为核心的数据计算单元等部分组成;传感器软件上采用广义回归神经网络的函数逼近方法,通过小样本训练建立精确测量模型。测量降雨作用在压力传感器上的压力大小及其对时间的变化,利用广义回归神经网络模型可计算得到精确雨量。试验表明,该传感器不仅解决了强降水等原因引起的雨量测量不准的问题,具有测量量程宽、精度高等优点。关键词:传感器技术;压力敏感元件;雨量计;广义同归神经网络中图分类号:TH
8、766文献标识码:A文章编号:1004—1699(2012)06—0761—05我国地面气象观测规范中对降水的定义.雨量术
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