基于振动传感器的车辆信号采集与分析

(TransducerandMicrosystemTechnologies)2009285*杨卫,李艳(,030051):,,,,:,,,:;;:TP391.41:A:1000-9787(2009)05-0022-03Vehiclesignalacquisitionandanalysisbasedonshakysensor*YANGWe,iLIYan(KeyLaboratoryofInstrumentationScience&DynamicMeasurementofMinistryofEducation,NorthUniversityofChina,Taiyuan030051,China)Abstract:Akindofvalidanalogsignalregulatedmeansisdesigned.Basedonwhich,asignalacquisitionanddetectingsystemofcollectinganddetectingshakyvehiclesignalisdeveloped.Whetheravehicleispresentornotcanbejudgedbythesensoroutput,thesensoroutputistested.Testresultshowsithasgreatdifferencebetweenpeopleandvehicle,thenpeoplearedistinguishedfromvehicle.Whenthedetectedvehicleismovedoverthesensor,theoutputchangesaredifferent,thesignalacquisitionanddetectingsystemcanrealizethefunctionofvehicle.Keywords:shakysensor;signaldetection;vehiclesignal0,,,(),,,,,,1EG&GICSENSORS3028,:2008-12-06*:,,,30281,413028Fig1Internalworkingtheroyof3028acceleratingsensor2,[1,2]225,:2U16,R40,C57,C52,,,,,,,,,RC2Fig2Amplifiedcircuitofsignal,,,,,MAXIMMAX291,3dB0.1~25kHz,3dB100,2MAX291,3,,,3Fig3FiltercircuitofsignalUA306A/D[2],16,1632,250k,,USB,PC,[3]3/3.1室内试验,0.05,0.06,0.07,0.08gn,44Fig4Schematicdiagramofcalibrationofshakysensor4,21.9V/gn3.2室外试验[4],1),,5,:,6,5()Fig5Backgroundyawptimeandfrequencyofshakytest6Fig6Sbakysignalwhenpeopleismoving2328,73m,,,:7Fig7Shakysignalwhenvehicleismoving2)[5]8,1.5m:162.8Hz,,93m,,,:156.8Hz,108m,8()Fig8Timeandfrequencyofshakyfigurewhenvehiclemovingacceleratednorth-south:,;,,;:500Hz,41):,,,,9()Fig9timeandfrequencyofshakyfigurewhenvehiclemovingacceleratedsouth-north10()Fig10Timeandfrequencyofshakyfigurewhenvehiclemovinguniformspeednorth-south134.3~162.8Hz,;2),,50Hz;3)2:,,,;,4),(27)245,:4(5):,UStanU=XS.(6),,U3Cr3+,55:10e2.9ms450e0.35ms,,2Ls,0.4e,,,1e5Fig5Relationshipdiagramoffluorescencelifetimeandtemperature6,:200e;400e,,,;,,,,,4Cr3+)Al2O3,6200e400eFig6Measurementofstabilityandrepeatabilityat200eand400e,,,,:[1]ZhangSijiong,WuLiu,FanLing,eta.lStraineffectdandtempe-raturecharacteristicsofTm/Hocodopedopticalfibersensors[J].JofOptoelectronics#Laser,2001,12(2):134-136.[2].[J].,1997,16(6):437-442.[3]GrattanKTV,PalmerAW,ZhangZ.Developmentofahigh-tempe-raturefiber-opticsthermometerprobeusingfluorescentdecay[J].RevSciInstrum,1991,62(5):1210-1213.[4]LouTingy,iTongLimin,HongDefe,eta.lOpticalpropertiesofplasticbertsapphirefibers[J].JofOptoelectronics#Laser,2001,12(2):120-122.[5],,,.[J].#,2002,13(8):773-776.[6],,.Hilbert[J].,2006,28(7):341-354.:(1952-),,,,,(24):[1],,,.[J].,2005,24(7):52-56.[2].[D].:,2003.[3],.[M].:,2002.[4],.MATLAB[M].:,,2006:50-65.[5].[J].,2001,20(4):42-44.[6]Jiagen(Jason)Ding.Vehicledetectionbysensornetworkno-des[C]MIEEEInternaionalConferenceonCommunicationsICC.01,Helsink,iFinland,2001.:(1957-),,,,27