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文档格式.docx

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文档格式.docx

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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.

security.Thepressedkeyoperationcodebythepressedkeywhichpresseswasdecided,when"

thehypothesis"

thekeyispresseddown,itscodedecidesas01H;

When"

relieves"

thekeypressesdown,itscodedecidesas00H.Whetheristhedecodingconfirmsreceivethecodelegitimateaseriesofoperatingprocess.Wasconfirmedthelegitimatecodeneedstosatisfythreeconditions;

（1）codesthechannelcodeandthedecodingchannelcodeissame;

（2）codedtheforewordnumbertobebiggerthanthedecodingforewordnumber（decodingforewordnumbertorecordonlegitimatelyhasusedcodeforewordnumber,thisconditionmightguaranteebeforehasusedcodewasinvalid）;

（3）jumpsthecodetobeequaltoreusesthespecialalgorithmtoextractchangesthecode.Afterthemonolithicinte