电子信息技术在智能交通信号灯控制中的应用 毕业论文外文文献翻译.docx
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电子信息技术在智能交通信号灯控制中的应用 毕业论文外文文献翻译.docx
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电子信息技术在智能交通信号灯控制中的应用毕业论文外文文献翻译
Electronicinformationtechnologyinintelligencestreet-trafficcontrollightscontrolapplication
1Introduction
Theurbanizedadvancementspeedsupdaybydaywithautomobile'sday-by-daypopularization,theaccidentfrequencysends,thetrafficcongestiontointensify,thestateofroadstoworsendaybyday,thetransportationquestionalreadybecamethepuzzleworldtheseriousproblem.Fromthiscausestrafficorderworsenedalreadyseriousinfluencemodernizationurbanconstructionandnationaleconomydevelopment.Studiesvehicles'generalrule,toalleviatesthetrafficjamaccordingtotheactualsituationformulationcorrespondinggeneralrule,raisesthestreetintersectionvehiclesgeneralefficiencytohavetheveryvitalpracticalsignificance.Thestreet-trafficcontrollightsaremanagingthetransportnetworkthemostimportantelement,butstreetvariousstreetintersectionsarealsothevehiclesgeneralkeyare.Alongwiththeelectronicinformationtechnology'srapiddevelopment,itsrelatedhypothesizedinstrumenttechnologyinthedataacquisition,thetestautomationandtheinstrumentcontroldomainobtainsthewidespreadapplication,causedthetestsystemandthesurveycontroldesignmethodwithrealizesthetechnologytohavethedeeptransformation.“thesoftwarewastheinstrument”alreadybecamethetestandthemeasuringtechniquedevelopmentimportantsymbol.
2Basedonelectronicinformationtechnologyhypothesizedinstrumenttechnologicaldevelopmentandappliedanalysis
Basedontheelectronicinformationtechnology'shypothesizedinstrumenttechnologyisoneinnewcenturyscienceandtechnologycoretechnologies,itcontainedthecomputertechnology,theautomaticcontroltechnology,theinformationtechnology,theelectronictechnologyandsoontobevarious.TheAmericanCountryInstrumentCompanyinthemid-1980sfirstproposedthatbasedoncomputertechnology'shypothesizedinstrument'sconcept,leadsthehypothesizedtesttechnologytherecentdevelopmenttime,afterwarddevelopedandhaspromotedbasedonmanykindsofbussystemshypothesized.Thehypothesizedinstrumentbrokethroughthetraditionelectronicinstrumentationtakethehardwareasthemainbodypattern,infactisonekindbasedoncomputer'sautomationmeasuringinstrumentsystem.Thehypothesizedinstrumentorganicallyfriendlyblendsthecomputerhardwaresourceandtheinstrumenthardwarethroughthesoftwareintoaunity,thusthecomputerformidablecomputationhandlingabilityandtheinstrumenthardware'ssurvey,controlunifiesintogether,reducedtheinstrumenthardware'scostandthevolumegreatly,andrealizesthroughthesoftwaretothedatademonstration,thememoryaswellastheanalysisprocessing.
Thehypothesizedinstrumentisbythecomputer,theapplicationsoftwareandtheinstrumenthardwareiscomposed.Unifiesthroughtheapplicationprocedurethegeneral-purposecalculatorandthefunctionalmodulehardware,theusermayoperatethiscomputerthroughthefriendlygraphicalinterface,completestofunctionsandsoontestdatagathering,analysis,judgment,demonstrationanddataprocessing.Inthehypothesizedinstrumentsystem'shardwareismerelytosolvethesignalrecuperationandtheinputoutput.Compareswiththetraditionalelectronicinstrumentation,thehypothesizedinstrumenthassubstitutedfortheparthardwarebythesoftware,realizedthedataread,dataanalysisprocessing,thedatawiththesoftwaretodemonstratethatandsoontraditionalinstrumentsonlycouldusethefunctionwhichthehardwarerealized.Thehypothesizedinstrumentoperatesthiscomputerthroughthefriendlygraphicalinterface,lookslikeatraditionalinstrumentwhichoperatesitselftohavecustom-madetobethesame.Itbythetransparentwaythecomputerresourcesandtheinstrumenthardware'ssurvey,controlunifiesintogether,realizesthedataanalysisprocessing,theexpressionthroughthesoftware.Bythiswayconstitution'shypothesizedinstrumentsystemmateriallyisthecomputerinstrumentsystem,inasense,“thesoftwareistheinstrument”.Thehypothesizedinstrumenthasthefollowingsomecharacteristics:
(1)Instrument'sfunctionandtheperformancerealizemostlyuseeithercompletecomplexcontrol,analysisorprocessingbythesoftwaregenerationofhardwaretechnologyabilitiesandsoonhardwaresoftware,emphasized“thesoftwareistheinstrument”thenewconcept,inthehypothesizedinstrument,besidesthenecessaryhardware,hassolvedthepresentsituationwhichthetraditionalinstrumentsingleinstrumentresourcescannotshare.
(2)Completingthedemonstration,thememory,theprintingandthemicroprocessorcontrolsupervisorbythecomputerandsoon,namely,regardlessofanyfunction'sinstrumentmayuseorsharecomputer'sthesepublicresources,butdoesnotneedthedesignwhichisredundant
(3)Themodulation,openness,theinterchangeablecharacteristicandtheresourcesduplication,andmayconvenient,setupeithertherestructuringautomatedtestsystemeconomically,theusermayaccordingtoownneedtoselectandpurchasethemodularinstrumentwithdifferentfunction,andmayalongwiththetestassignmentdifferentandthenimblecombination,enhancestheinstrumentresourcestobepossiblethereusability.
(4)Fromdefinitioninstrumentfunction.Traditionalinstrumentwhenleavingtheplantitsfunctionalreadydeterminedbythemanufacturerthattheusercannotactaccordingtoowndemandmomentarilytomaketherevision,assoonascanonlyonemachineuse,butthehypothesizedinstrumentmaydrawsupportfromthegeneraldataacquisitioninstallment,establishesthedifferentsoftwaretestingplan,thestructurenearlyrandomfunctioninstrument,“thesoftwareistheinstrument”thethoughtmanifestsoncemoreinhere.
(5)Causingbetweenthehardwaretestequipmentandcomputer'sdataexchangebecomesveryconvenient,isdirectandisrapid.Willusethehypothesizedinstrumenttechnology,thetestfacilityobtainedtestresultreal-time,willtransmitcomputer'smemoryortheharddiskdirectlythroughthecomputermainline,forthelateranalysisuse.Thus,ontheonehandhasavoidedthedatatransmissionquestion,ontheotherhandmayusecomputer'smemoryfunctionfully.
(6)Usingthepersonneltobepossibleorusestheexistinganalysismodulethroughthesoftwareprogramming,accordingtotheprojectactualneedreal-time,carriesoneachkindofanalysisandprocessingdirectlytothetestdata.
3Street-trafficcontrollightscontrolpolicyandelectronicinformationimportanalysis
Thestreet-trafficcontrollightscontrolpolicy'sgoalisthesolutionhandsoverthethroughflowquestion,andusingeachalgorithmminimumvehicles'journeyexpenditure.Manystreet-trafficcontrollightscontrollerresearch'sfocalpointisgreenwhenthecompatibility,perhapscontrolcirculationorder.Inpracticallifemultipurposefixedcyclecontroller,thisfixedcyclecontrollercanbringthesimplificationwhichthestreet-trafficcontrollightscontrolsystemrealizes,butwillalsobringthetransportationgeneraltimetheextremewaste.Becauseitsgreenlightrecursivesequenceiscertain,doesnotconsiderthetransportationinformation,thereforecertainlywillhavesuchsituationoccurrence:
Inastreetintersectionnotthehowmuchvehiclesactuallylong-timewhenholdsisgreen,inotherstreetintersectionhasmanyvehiclesareactuallyunabletoobtainaregreenwhencanonlypassivebeatthewaitingstatus.Inordertosolvefixedcyclecontroller'sallsortsofmalpractices,thepeoplehavemadeeachkindofimprovementtoit.ForexamplewillenhanceperformancethischaracteristicinviewofacrowdedroadsectiongreenlightcyclelongerVietnam,thepeoplewillcauseitregardingthebusyroadsectionprimordialconsiderationchangegreen.Andproposedthesignallightdisplacementquantity,namelydefinesonecycletobeoppositeinotherstreet-trafficcontrollightscyclebeginningtimedisplacementquantity.Wecanadjustthisdisplacementquantitytocauseseveralstreet-trafficcontrollightstocarryonthecooperation,forexamplestreet-trafficcontrollightssynchronizationdetention.Moreoverinviewofmaythecompoundevent,theintroductiontablerecordpeculiarcircumstancehypothesis.
Althoughtheseimprovementsalreadytoacertainextentoptimizedthetrafficcondition,butstaticcontroller’sallsortsofmalpracticesstillexisted.Forexampleitsparameterhypothesisworkhuge,andthecontrollerneedstohavetherulealongwiththetransportationsituationchangetocarryontherenewal;Itisimperfectregardingaccident'sprocessing,oncetheaccidentoccursneedstomakethemassivemanualupdatestothesystem.Althoughthestaticcontrollermayprecisegivethestreetintersectionconditiontheduration,butstillneededtoadjustmanydetails.
Hasprovidedthesolutionpossibilityalongwiththeintelligencetrafficlightcontrolsystem'sappearancetothesequestions,namelysolvesthetrafficcontrolproblemwiththeintelligentalgorithm.Suchintelligentsystemmaynotusetheconsiderationcontrolcirculation,howwasthedecisionmakingdecidedbyatthattimethetransportationstreetintersectionrealsituation,likethismightamoreprecisecontrol.Accordingtowhethertojointheintelligentalgorithmtobepossibletodivideintothestreet-trafficcontrollightscontrolpolicy2kinds:
Traditioncontrolpolicy,intelligentcontrolstrategy.Andthetraditioncontrolpolicyincludes:
Fixedcycles,longestWaitingline,relativelylongestWaitinglinecontrolpolicyandsoon;Theintelligentcontrolstrategy'scorealgorithmincludes:
Fuzzylogic,geneticalgorithm,incomebarrelalgorithm,improvementstrength
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