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轮胎压力监测中英文资料外文翻译文献参考文献MONITORINGTHETIREPRESSUREATCARSUSINGPASSIVESAWSENSORSALFREDPOHL1,GOSTERMAYER,LREINDL2,FSEIFERT1APPLIEDELECTRONICSLABORATORY,UNIVERSITYOETECHNOLOGY,GUSSHAUSSTRASSE27,A1040VIENNA,AUSTRIA2SIEMENSCENTRALRESEARCHLAB,OTTOHAHNRING6,D1739MUNICH,GERMANYABSTRACTINOURPAPERWEPRESENTTHEAPPLICATIONOFSURFACEACOUSTICWAVESAWSENSORSTOTHECONTINUOUSMANITARINGOFTHETIREPRESSUREINROADVEHICLESWITHTHESE,THETIREPRESSURECANBEREADOUTINEVERYPHASEOFDRIVINGWESHOWTHEIMPLEMENTEDPROTOTYPESETUPFORMEASUREMENTOFTHETIREPRESSURE,THEAPPLIEDSAWSENSORS,IMPROVEDVERSIONSANDTHEINTERROGATIONSETUPTHEPROBLEMSINPRACTICALAPPLICATIONAREDISCUSSEDEXPERIMENTALRESULTSMEASURINGTHETIREPRESSUREDURINGTESTRIDESAREPRESENTEDINTRODUCTIONOPERATINGAROADVEHICLE,AMALFUNCTIONOFTHETIRESINMOTIONDUETOATIREPUNCTURECANCAUSESERIOUSACCIDENTSANDENDANGERHUMANLIFEFURTHERMORE,NOWADAYSMANUFACTURERSOFCARSTRYTOSAVETHESPAREWHEELINVEHICLESUSUALLYITONLYCOSTSWEIGHTANDSPACE,THEREFOREITYIELDSAHIGHERFUELCONSUMPTION,ALTHOUGHITWILLBEREQUIREDLESSTHANONETIMEINMORETHANTENYEARSOFACARSLIFETHISONLYCANBEDONE,IFTHEAIRPRESSUREINTHETIRESCANBEMEASUREDEVENDURINGDRIVINGCURRENTLYUSEDSENSORSCONTAINACTIVECOMPONENTS,POWEREDBYALITHIUMBATTERYTHEMASSOFTHESESENSORASSEMBLIESISABOUT20GRAMSCAUSINGHIGHDYNAMICLOADAFEWYEARSAGO,WIRELESSIYINTERROGABLESAWDEVICESFARSENSORAPPLICATIONSWEREINVENTED1,2,3USINGANONEPORTSAWDELAYLINECONNECTEDTOANANTENNAONLY,ANRFINTERROGATIONSIGNALISFEDINTOANDTHESENSORRESPONSE,CARRYINGTHESENSORINFORMATIONISRETRANSMITTEDWIRELESSLYTOTHEINTERROGATORTHESESENSORSARECAPABLEFORMEASUREMENTOFTEMPERATURE,MECHANICALLOAD,FORCEANDDISPLACEMENT,ETCTHEADVANTAGEIS,THATSAWSENSORSARETOTALLYPASSIVEDEVICESANDCONTAINNEITHERPOWERSUPPLYNORSEMICONDUCTORSTHEYWITHSTANDTEMPERATURESUPTOSEVERALHUNDREDSOFDEGREECENTIGRADES,THEIRLIFETIMEISMUCHLONGERTHANTHATOFBATTERYPOWEREDSYSTEMSFURTHER,INVEHICLESSTRONGELECTROMAGNETICPOLLUTIONISGENERATEDBYIGNITIONSYSTEMSETCSAWSENSORSOPERATEWITHOUTRISKOFDAMAGEEVENINROUGHENVIRONMENTSFIRSTWEDISCUSSPRESSUREMEASUREMENTEMPLOYINGSAWSENSORSWITHWIRELESSINTERROGATIONWEPRESENTSOMETYPESOFSENSORASSEMBLIESANDTHEINTERROGATIONSYSTEMNEXTWEDISCUSSTHEIMPLEMENTATIONINTOTHECARANDTHENWEPRESENTEXPERIMENTALLYRESULTSFINALLYABRIEFSUMMARYCONCLUDESTHECONTENTOFTHEPAPERSAWPRESSURESENSORSTHEELECTRICALBEHAVIOUROFAPASSIVESAWPRESSURESENSORALWAYSISTHATOFAONEPORTDELAYLINEWITHMULTIPLEREFLECTORSORARESONATOR,RESPECTIVELYINTHEDELAYLINECASE,THEINTERROGATORTRANSMITSABURSTSIGNAL,THESENSORRESPONDSWITHACHAINOFBURSTS,ONEFOREVERYREFLECTORARRANGEDATTHESUBSTRATESSURFACETHEDIFFERENTIALDELAYBETWEENTWOORMORERESPONSESIGNALSISEVALUATEDTOMEASURESOMEPHYSICALVALUE,THEPARAMETERHASTOBECONVERTEDINTOACHANGEOFSENSORSSURFACELENGTHORSURFACEACOUSTICWAVESVELOCITY,RESPECTIVELYTHEDELAYRIOFTHERESPONSEOFAREFLECTORIISTHERATIOOFSAWPROPAGATIONLENGTHLIONTHESUBSTRATESSURFACEANDPROPAGATIONVELOCITYV,AFFECTINGTHESENSORWITHAMEASURANDCAUSESASCALINGOFTHESENSORSRESPONSETOBEOBSERVEDASINDIVIDUALDELAYSHIFTSARIOFTHERESPONSESIGNALSSIORIGINATINGFROTMHEREFLECTORSIMECHANICALMEASURANDSCANBECOLLECTEDBYLOADINGTHESENSORMECHANICALLYAPARTFROMSTRETCHINGANDCOMPRESSING,UTILIZEDFORWIRELESSMEASUREMENTOFTORQUE,ETCTHESAWSENSORSSUBSTRATECANBEBENTPRESSURECANAFFECTTHESENSORBYBENDINGAMEMBRANE,SHIFTINGTHEEDGEOFASENSORFIXEDONTHEOTHERSIDEHERETHESENSORISLOADEDTOBEBENTDUETOASHIFTOFTHECENTEROFAMEMBRANELOADEDBYTHEPRESSUREONTHEOTHERHANDTHESENSORCANDIRECTLYBEFITTEDTOTHEMEMBRANEORAPIEZOELECTRICMEMBRANEREPRESENTINGTHESAWSUBSTRATECANBEUSEDFIGURE1SHOWSTHESEMETHODSFIG1AMEMBRANECONVERTINGPRESSURETOSHIFTBENDINGTHESAWSENSORSAWSBSAWSENSORFITTEDTOTHEMEMBRANETHENEXTSTEPISTOCOVERTHESENSORMEMBRANEBYACAPCONSISTINGOFASPACERFRAMEANDAQUARTZCOVERPLATETHISYIELDSANINTEGRATEDPRESSURECHAMBERSAWSENSOR4FIG2FIG2INTEGRATEDPRESSURECHAMBERSAWSENSORTHECOVERPROTECTSTHESAWGENERATINGMETALLICSTRUCTUREFROMOXIDATIONANDTHESURFACEFROMDUSTTHECAVITYCANBEFIILEDWITHAGASATREFERENCEPRESSUREIFTHECAVITYISEVACUATED,ABSOLUTEPRESSUREVALUESCANBEMEASUREDMEASUREMENTISMADEBYINTERROGATIONUSINGSIMPLERFBURSTSIGNALSTHERESPONSEIMPULSESAREEVALUATEDINMAGNITUDEANDPHASEBENDINGTHEMEMBRANEDUETOPRESSURELOADYIELDSAPHASESHIFTOFFORINSTANCE100DEGREEFORLO4PASCALWITHTHISTHEAIRPRESSUREINCARTIRESCANBEMEASUREDWITHARESOLUTIOONFAPPROXIOPASCAL001BARTOREDUCETHEAMOUNTOFDATATOPROCESS,FORTHEIMPLEMENTATIONINCARSTHERESOLUTIONWASREDUCEDTO50MBARIMPLEMENTATIONTHEFIRSTPROTOTYPEUSEDFORTHEEXPERIMENTALMEASUREMENWTSASAPRESSURECHAMBERWITHAMEMBRANEMADEOFBRASSTHESENSORUNITWASFITTEDTOAHUBCAPANDWASCONNECTEDTOTHEVALVEBYAPRESSUREASSEMBLYFIG3FIG3FIRSTPROTOTYPEOFPRESSURECHAMBERFORMEASUREMENTOFTIREPRESSUREFORSERIALMANUFACTURETHESENSORSYSTEMHAVETOBEMUCHSMALLERANDABLETOBEINTEGRATEDINTHETIRETHEREFOREWEIMPLEMENTEDTHEINTEGRATEDPRESSURECHAMBERFIG2INTOTHETIRETHESENSORWASFIXEDTOTHERIM,THEMETALLICVALVESHAFTWASUSEDASTHESENSORSANTENNAFIG4FIG4INTEGRATEDPRESSURECHAMBERFIXEDTOTHERIM,VALVEUSEDASANTENNAFOIRMPROVEDIMPLEMENTATIONASENSORASSEMBLYONLYFITTEDTOTHEVALVEWASDEVELOPEDFIG5THETOTALMASSOFTHEUNITISONLYAFEWGRAMS,THEDYNAMICLOADISSMALLEVENDRIVINGATHIGHSPEEDFIG5PRESSURESENSORFORFITTINGINTOTHEVALVESHAFTTHCEARBA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一一个传感器安装在阀的开发(图5)。的总重量的单位只有几克,动态负载很小甚至驾驶高速。图5压力传感器阀轴审讯系统采用基于空间的多样性,以区分传感器低于每一辆翼天线要使用同轴电缆,小屋是困难和昂贵利用这些扭曲的适用性对电线太多。为了检验我们的传感器和我们的系统,我们做了很多测试车领域内

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