外文翻译-基于单片机的汽车倒车防撞语音提示系统.docx

外文翻译-基于单片机的汽车倒车防撞语音提示系统.docx

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BasedonnRF24E1andTMC2023automobilecollisionavoidancesystemdevelopmentandrealization

CarengineeringdepartmentofinstituteoftechnologyofMunich

ByLORENZFERDIDAD

Progressofsocietywiththedevelopmentoftimes,moreandmorecarshaveenteredordinarypeople'sfamily.Thoughthehighwaytermsisbeingupdated,yetavoidthecrowdedcurrentsituationofgettingonthecarofunavoidablehighway,inaddition,thespeedisimprovedgradually,themalignanttrafficaccidentishappeningallthetime,havebroughttheenormouslifeandpropertylosstopeopleandthesociety.Caranticollisionsystemwhetheronecansendoutseeingandhearingsurveydeviceofwarningsignalinadvancetodriver.Itinstall,atcar,cansurvey,attemptpedestrian,vehicleorbarrieraroundclosetheautomobilebodyusually;Cansendoutandcollidethedangeroussignalsoontodriverandpassengeraheadoftime,impeldriverbypassdrivertakeemergencymeasurepunishspecialdangeroussituationeven,avoidlosses.Atpresent,thoughvariouscountriesstudy,preventsystemofcollidingfrom（usuallycalltheinitiativesecuritysystemintheworld）,buthowcouldsolvethetimidandalertproblembetter,perplexingrelevantworkersallthetime.Theresearcherintheworldstudiesthroughalargenumberofexperiments,hasalreadyreachedcommonunderstanding,ifwanttosolveproblemdescribedaboveeffectively,theanticollisionsystemmusthavethefollowingfunctions:

1）Mustbecapableofexaminingtheangle,theazimuthalinformationofthegoalisessentialforremovingemptilyandalertly

（2）Apttoproduceanti-interferenceperformancestrongcomplicatedtransmissionsignal,cooperatewithreal-timehigh-efficientsignaldealwithwithgoalmeasuringalgorithms,inordertoremoveemptilyandalertly.

Onlytheabovetwopointscombinetogetherandguaranteethesystematicdependabilitythatthecardefendscollidingclosely.

1TMC2023chipandthenRF24E1chipcharacteristicintroducedTMC2032isonekindofnewentiredigitalcorrelationinstrumentelectriccircuit,itscorrelationwordlengthandtherelatedthresholdareprogrammable.Thischipisthemonolithic64CMOSentirenumeralcorrelationinstrumentlargescaleintegratedcircuitwhichAmericanTRWCorporationrecentyearspromoted,itsinteriorhadthreeindependentclocks8displacementspositionsregisters（stochasticdataregisterA,localcoderegisterBandshieldcoderegisterM）;Moreoveralsohas7registerstousefortoloadpre-placedlimit.0~64betweenwilfullylongstochasticdataandthelocalcodeafterthecorrelationoperation,bythethreesamitthecushion7BCDcodeoutput,andlimitcomparewiththeinitializationinthecomparator,ifthecorrelativevalueisbiggerthanorisequaltolimit,thentheflagbitbylowlychangeshigh.BecausehasusedtheadvancedhighspeedCMOSproductioncraft,theparallelcorrelationspeedreachesashighasabove30MHz.Butwidelyappliestosynchronization,thematchedfiltering,harmsinthecodeexamination,therecordingandthebarcoderecognition,especiallysuitstotheradarsignalrecognition.NRF24E1isonekindofoperatingfrequencymayachieve2.4GHzthewirelessradiofrequencyreceivinganddispatchingchip,thechanneloperationtimeissmaller

than200mus,thedatarateis1Mbpsoutside,doesnotneedtomeettheSAWfilter,isglobalgenerallowcostradiofrequencysystemlevelchipwhichthepresentworldpromotesforthefirsttime.Theinteriorinlayshaswith8,051compatiblemicroprocessorsand109inputsA/Dswitches,maybetweenunderthe1.9V~3.6Vvoltagethesteadywork;TheinterioralsoinlayshaveimpresstheadjusterandtheVDDvoltagemonitoringdevice.WirelessreceivinganddispatchingpartiallyhaswiththenRF2401similarfunction,thisfunctionstartsbytheinternalparallelmouthandinternalSPI,eachdue-outsignalsaysregardingtheprocessorallmaytakeseverscarriesontheprogramming,orgivesthemicroprocessorthroughtheGPIOportbiography.ChipnRF24E1mayrealizethewirelesscommunicationinworldpublicfrequencybandscope2.4~2.5GHz.Receivesanddispatchesthepartialpackagestoincludethefrequencydivider,theamplifier,theregulatorandtworeceivinganddispatchingunits.Theoutputenergy,thefrequencybandandotherradiofrequencyparameterpassableradiofrequencyregistersconvenientlyhaveprogrammedtheadjustment.Underthetransmissionpattern,thecurrentconsumptiononlyhas10.5mA;Underthereceivepattern,thecurrentconsumptiononlyhas18mA,thereforethepowerlossisquitelow.

2systemsstructuresentirewrapinformationgatheringsystemiscomposedbyfivesetsofradiofrequencieslaunchesandthereceivingdevice,eachsetoflaunchesandthereceivepartialbasicelectriccircuitsallaresame,thesefivesetsoftransmitter-receiversetalsoisconnecte