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(TransducerandMicrosystemTechnologies)20102912邹建,卢平,应苑松,钱波(,400030):,,,:0~300mmHg,,1100V/mmHg,:;;:TP212.3:A:10009787(2010)12009003AnewtypeofpulsepressuresensorZOUJian,LUPing,YINGYuansong,QIANBo(SchoolofOptoelectronicEngineering,ChongqingUniversity,Chongqing400030,China)Abstract:Aimedatthedefectsofsinglepulsepressuresensor,atechnologyoftouchmembranebuttonpanelispresented.Asensorwithseveralroutewaypulsepressuresensorsismadetoobtainseveralroutewaypulsesignalsandtheassociatedhardwarecircuitryisdesignedtoconductthepulsesigna.lExperimentalresultsshowthatthelinearityandrepeatabilityofthepulsepressuresensorareexcellent,andthesensitivityisupto1100v/mmHginpressureof0~300mmHg.Thepulsesignalsacquiredbypulsesensoraredisplayedonthecomputermonitorthroughtheoscilloscopeserialcommunicationexpansionmodule.Theeffectisremarkable.Keywords:pulsesigna;lelasticfilm;pulsepressuresensor0,,,,,[1],,,,,,11.1传感器结构PVC,,,[2],1r1Fig1Structurediagramofpulsepressuresensorw(r)=p(R2-r2)264D.(1)w(0)=pR464D.(2),D,D=EyH312(1-2),(3)Ey,1.2ANSYS模型分析ANSYS:201003229012,:,8Solid45,11PVCTab1ParametersofPVCandstructuresizeofsensorEy(MPa)R(mm)H(mm)L(mm)15000.3640.1750.2240kPa,:,w(0),2Fig2Distributiondiagramofmembranedeflection,,,CxCx=dCx=0R02rdrl0-w(r)=40R264w(0)l0lnl0w(0)+2l0w(0)+2-1l0w(0)-2l0w(0)+2-1.(4)22.1系统电路,,555,F/V,,33Fig3Blockdiagramofsystem555F/VVout=2.09RLRS(RtCt)fin=2.09RLRS(RtCt)1.443(Ra+2Rb)(Cx+C).(5)(2)~(4)(5)Voutp,C2.2信号调理电路[3]:10Hz,,50Hz,,40Hz,0.5Hz,0.2Hz,,0.5~40HzFilterPro,,,,,100,,,33.1传感器性能测试,,LM3310~300mmHg,,322pCxVoutTab2Experimentaldataofpressurep,capacitanceCx,outputvoltageVout(mmHg)0306090120150(pF)1.251.351.391.531.661.81(V)2.9702.9382.9002.8672.8342.802(mmHg)180210240270300-(pF)1.932.302.743.514.23-(V)2.7652.7312.6992.6622.624-4,0~270mmHg,;270mmHg,,,:,270mmHg,,5,3,;0~300mmHg4Fig4Comparisondiagramofexperimentalandtheoreticalvalue91295Fig5RelationcurveofpvsVout,,,MatlabpVout,Vout=2.97-0.0011p.(6),,Vout=-0.0011p.(7)SS=dVoutdp=0.0011.(8)1100V/mmHg3.2脉搏信号测试,,,,6,,[3](),6,1s,60,62,,6Fig6Testingdiagramofpulsesignal4,,,,[4],,,,,:,;,,,:[1],,.[J].,2005,3(19):102-104.[2]WenHKO,MinHangbao,YeunDinghong.Ahighsensitivityintegratedcircuitcapacitivepressuretransducer[J].IEEETransElectronDevices,1982,29(1):48-56.[3],.LabVIEW[J].,2008,12(4):330-333.[4],.[J].,2000,7(5):319-320.:(1960-),,,,,(89)3AD698,AD698,,,:[1].AD598[J].,1999(6):54-57.[2].[J].,1999(4):24-25.[3],,.[J].,2005,26(12):1248-1252.[4],.LVDT[J].,2005(5):52-54.[5],,,.[J].,2005,26(3):10-12.[6],,,.[J].,2000,37(11):45-46.[7],.LVDT[J].,2007,37(3):320-326.[8],,.[J].,2006,25(5):30-33.[9],.AD598[J].,2007,37(7):189-191.[10],,,.AD598[J].,2007,26(2):68-70.[11],,.AD698LVDT[J].,2005(9):63-65.:(1988-),,,,92