精品中英文外文翻译--基于单片机的汽车防盗报警系统设计-定.doc

精品中英文外文翻译--基于单片机的汽车防盗报警系统设计-定.doc

《精品中英文外文翻译--基于单片机的汽车防盗报警系统设计-定.doc》由会员分享，可在线阅读，更多相关《精品中英文外文翻译--基于单片机的汽车防盗报警系统设计-定.doc（10页珍藏版）》请在冰豆网上搜索。

Basedonmonolithicintegratedcircuitautomobilesecurityalarmsystemdesign

Abstract:

Decodestheautomobilesecuritysystemusingthemonlitchisintegratedcircuitinteriorresourcesrealizationjumpcode,iteachtimeusestheremotecontrolpasswordallischanging,bothenhancedthesystemsecurity,andgreatlyreducedthecost.

Keyword:

Monolithicintegratedcircuit,Automobilesecuritysystem,Code/decode

Introduction

Isunceasinglyprogressivealongwiththesocialeconomyandthehightechrapiddevelopment,intheroutineworkandthelife,theautomobilehasbecomethepeopleidealtransportationvehicle.Butthefollowingmotorvehiclethecasewhichrobbedgraduallyisalsoincreasedhascreatedthepiloteconomicalpropertyloss.Inordertoreducetheautomobiletorobtheeventtheformationrate,forhastheautomobiletheusertoprovidethesafetycontrol,simplydevelopsonekindtobereliable,theeaseofoperation,cansendoutinthediscoverynormalconditiontothepilotreportstothepolicethereminderandthesecuritywarningsafetysystemhasthepracticalsignificance.Thisarticlebasedontotheexistingautomobilesecurityalarmsystemgeneralizedanalysis,developsonekindofbrand-newsecurityalarmsystem.Thissystemhasmainlyusedthejumpcodecode/decodingprinciple,causestheoverallsystemtobesafer,greatlyreducespasswordexplainingrate.

1.Systemprincipleofwork

Theautomobilesecurityalarmsystemtheremotecontrolwhichcarriesbythedriverandinstallsintheautomobilethecontrollertwopartscomposes.TheremotecontrolandthecontrolleralluseeightCMOSwhichAmericanAT-MELCorporationproducestheAVRmonolithicintegratedcircuit,thisseriesmonolithicintegratedcircuitbasedonnewsimplifiesinstructionRtheISCstructure,includestheservicelifemosttobefewis1,000timewrites/scratchesthecirculationtheFlashprogrammemory,aswellastheservicelifeatleastis100,000timewrites/scratchesthecirculationEtheEPROMdata-carrierstorage,some2onlyhavewhentheentirepiececleaningcancleantheprogrammingencryptionlocksthelocalization.

1.1Systemdesign

Theautomobilesecurityexaminationusestheultrasonicsensor.Theultrasonicsensoriscomposedbytheultrasonicwavetransmissioncircuitandthesupersonicreceptionelectriccircuit,intheautomobilecabappropriateposition,installstheultrasonicwavelaunch/receiver,aswellasswitchelectriccircuitT1.Whentheautomobileparksthevehicleownerpersonmustleavetheautomobile,withremotecontrolclosedswitchT1,theautomobilealarmsystemsatgarrisonsthecondition,aroundthesystemuseultrasonicwaveexaminationvehicleobstacle.Launchesthepartialelectriccircuitslikeschart1toshow.WhenitsP1mouthP1.1,P1.2totheDtrig,theP1.0controlultrasonicwavelaunch,are0,thephotoelectricitycoupleroutputstheTP1endis1,thepermissionultrasonicwavelaunch,launches/thereceiveultrasonicwaveinturn,thecirculationrepeatedlycarrieson.Simultaneouslythemonolithicintegratedcircuitinteriorcounterstartstocount.Thesteamdistancebetweenvehiclesobstacledistanceisthetimewhichsendsoutthroughthesoundnavigationandrangingreflectsspendsdeterminesandcarriesonthecomputation.ThereflectionsignalcausestheDtriggertoproduceinterruptrequestsignalINT1,simultaneouslystopscounting,readstakescountsthevalue,calculatestheactualdistanceaftertheformula,thencarriesonthecomparisonwiththedatumdistance,ifexamineswhentheactualdistanceisbiggerthanreferencevalue80cm,doesnotcarryontheaccustom-opticstoreporttothepolice;Ifsomepeopleapproachtheautomobiletoenterthecab,theexaminationactualdistanceissmallerthanorwasequaltowhenreferencevalue80cm,throughmonolithicintegratedcircuitP2.2andtheP2.3port,actuatestheindicatinglampdisplaycircuitandthesoundalarmcircuit,sendsoutthreetwoflash.Andtriggersahighlevel,theactuationiswirelesssignaltransmissioncircuit.

Chart1Ultrasonicwavetransmissioncircuit

1.2Code/decodingprinciple

ThepresentautomobileremotecontrolsecuritysystemaremanyisusesVD5026/27,PT2262/72,HT12E/Dandsoonthegeneralcode/decodestheelectriccircuit,itspassworddecidedbythecomponentaddress,eachsetofsecuritysystemsuseafixedinvariablepassword.Alongwiththemicroprocessingtechnologydevelopment,throughthereceiveremotecontroltransmittingmessage,mayinterceptthisfixedpassword,moreovergeneralarrangesthedecodingaddresstolosethepersontocarrythecomponentsizelimit,itsquantityisimpossibletoomuch,canobtainnotrepeatedlycodesveryisalsolimited,alsocanveryquicklyexplainthepasswordwiththeautomaticscanner.Therefore,thiskindofpasswordfixedinvariableautomobilesecuritysystemhasreceivedtheseri