搜索
单片机交通灯中英文资料对照外文翻译文献原文题目：DESIGNOFTRAFFICLIGHTBASEDONMCUBecauseoftherapiddevelopmentofoureconomyresultinginthecarnumberoflargeandmedium-sizedcitiessurgedandtheurbantraffic,isfacingserioustest,leadingtothetrafficproblemincreasinglyserious,itsbasicallyarebehavedasfollows:trafficaccidentfrequency,tothehumanlifesafetyenormousthreat,Trafficcongestion,resultinginserioustraveltimeincreases,energyconsumptionincrease;Airpollutionandnoisepollutiondegreeofdeepening,etc.Dailytrafficjamsbecomepeoplecommonplaceandhadtoendure.Inthiscontext,incombinationwiththeactualsituationofurbanroadtraffic,developtrulysuitableforourowncharacteristicsofintelligentsignalcontrolsystemhasbecomethemaintask.PrefaceInpracticalapplicationathomeandabroad,accordingtotheactualtrafficsignalcontrolapplicationinspection,planarindependentintersectionsignalcontrolbasicusingsetcycle,muchtimesetcycle,halfinduction,wholesensoretcinseveralways.Theformertwocontrolmodeiscompletelybasedonplanarintersectionalwaystrafficflowdataofstatisticalinvestigation,duetotrafficflowtheexistenceofvariablesexandrandomicity,thetwomethodshavetrafficefficiencyislow,thescheme,thedefectsofagingandhalfinductiveandalltheinductivethetwomethodsareintheformertwowaysbasedonincreasedvehicledetectorandaccordingtotheinformationprovidedtoadjustcycleislongandgreenletterofvehicle,itthanrandomarrivedadaptabilitybigger,canmakevehiclesintheparkingcordbeforeasfewparking,achievetrafficflowingeffectInmodernindustrialproduction,current,voltage,temperature,pressure,andflowrate,velocity,andswitchquantityarecommonmainlycontrolledparameter.Forexample:inmetallurgicalindustry,chemicalproduction,powerengineering,thepapermakingindustry,machineryandfoodprocessingandsoonmanydomains,peopleneedtotransporttheorderly2control.Bysinglechipmicrocomputertocontroloftraffic,notonlyhastheconvenientcontrol,configurationsimpleandflexiblewaitforanadvantage,butalsocangreatlyimprovethetechnicalindexbycontrolquantity,thusgreatlyimproveproductqualityandquantity.Therefore,themonolithicintegratedcircuittothetrafficlightcontrolproblemisanindustrialproductionweoftenencounterproblems.Inthecourseofindustrialproduction,therearemanyindustrieshavelotsoftrafficequipment,inthecurrentsystem,mostofthetrafficcontrolsignalisaccomplishedbyrelays,butrelaysresponsetimeislong,sensitivitylow,long-termafteruse,faultopportunityincreasesgreatly,andadoptssingle-chipmicrocomputercontrol,theaccuracyoffargreaterthanrelays,shortresponsetime,softwarereliability,notbecauseworkingtimereduceditsperformancesake,comparedwith,thissolutionhasthehighfeasibility.AboutAT89C511.functioncharacteristicsdescription:AT89C51isalowpowerconsumption,highperformanceCMOS8bitmicro-controller,hasthe8KinsystemprogrammableFlashmemory.Usehigh-densityAtmelcompanythebeltpasswordnonvolatilestoragetechnologyandmanufacturing,andindustrial80S51productinstructionsandpinfullycompatible.ChipFlashallowprogrammemoryinsystemprogrammable,alsosuitableforconventionalprogrammer.Inasinglechip,havedexterous8bitsCPUandinsystemprogrammableFlash,makeAT89C51formanyembeddedcontrolapplicationsystemprovidesthehighflexible,superefficientsolution.AT89C51hasthefollowingstandardfunction:8kbytesFlash,256bytesRAM,32-bitI/Omouthline,thewatchdogtimer,twodatapointer,three16timer/counter,a6vectorlevel2interruptstructure,full-duplexserialport,pieceinsidecrystalstimelyclockcircuit.Inaddition,AT89C51candropto0Hzstaticlogicoperation,supporttwosoftwarecanchoosepowersavingmode.Idlemode,theCPUtostopworking,allowingtheRAM,timer/counter,serialports,interruptioncontinuetowork.Powerlostprotectionmode,RAMcontentbeingsaved,hasbeenfrozen,microcontrollerallworkstop,untilthenextinterruptionorhardwareresetsofar.Asshowninfigure1fortheAT89C51pinsallotment.P1.01P1.12P1.23P1.34P1.45P1.56P1.67P1.78RST/Vpd9(RXD)P3.010(TXD)P3.111(INT0)P3.212(INT1)P3.313(T0)P3.414(T1)P3.515(WR)P3.616(RD)P3.717XTAL218XTAL119END20P20(A8)21P21(A9)22P22(A10)23P23(A11)24P24(A12)25P25(A13)26P26(A14)27P27(A15)28PSEN29EA/Vpd31ALE/PROG30P0.7(AD7)32P0.6(AD6)33P0.5(AD5)34P0.4(AD4)35P0.3(AD3)36P0.2(AD2)37P0.1(AD1)38P0.0(AD0)39VCC40Figure1theAT89C51pinsallotment2.interruptintroductionAT89C51hassixinterruptsources:twoexternalinterruption,(and),threetimerinterrupt(timer0,1,2)andaserialinterrupts.EachinterruptsourcecanbepassedbuybitsorremoveIEtherelevantspecialregisterinterruptallowcontrolbitrespectivelymakeeffectiveorinvalidinterruptsource.IEalsoincludesaninterruptallowtotalcontrolbitEA,itcanbeabanallinterrupts.IE.Sixisnotavailable.ForAT89C51,IE.5bitsarealsonotbeused.Usersoftwareshouldnotgivethesebitswrite1.TheyAT89seriesfornewproductreserved.Timer2canbeTF2andtheT2CONregistersEXF2orlogicaltriggered.Programintoaninterruptservice,thesignbitcanbeimprovedbyhardwareqing0.Infact,theinterruptserviceroutinemustdeterminewhetherTF2orEXF2activationdisruption,thesignbitmustalsobysoftwareqing0.Timer0and1markatimerTF0andTF1hasbeenpresentedinthecyclecountoverflowS5P2074bits.Theirvalueuntilthenextcyclewascircuitcapturedown.However,thetimer2marksaTF2incountoverflowofthecycleofS2P2074bits