搜索
TrafficlightsandPLCWitheconomicdevelopment,increasedthenumberofvehicles,roadcongestionisbecomingincreasinglyserious,intelligenttrafficlightsontheemerged.Atpresent,theworld'sIntelligentTransportationSystemwillbe:ahugestructure,managementdifficulties,suchasthemaintenanceoflargeinputs.Inordertoimprovetheexistingtrafficconditions,andtoovercometheexistingshortcomingsofintelligenttransportationsystemIdesignedanalogcontroltrafficlightsinurbanandruralareasofsmall-scalesmarttrafficlights.Ithassmallsize,intelligence,maintenanceintosmall,easytoinstallandsoon.Andotherintelligenttransportationsystemcomparedtothesystemtoadapttoeconomicandsocialdevelopment,inlinewiththecurrentstatusofscientificandtechnologicaldevelopment.Intelligenttrafficlightsareacomprehensiveuseofcomputernetworkcommunicationtechnology,sensortechnologytomanagetheautomaticcontrolsystemoftrafficlights.Urbantrafficcontrolsystemisusedforurbantrafficdatamonitoring,trafficsignalcontrolandtrafficmanagementcomputersystem;itisthemodernurbantrafficcontrolsystemcommandandthemostimportantcomponent.Inshort,howtousetheappropriatecontrolmethodtomaximizetheuseofcostlycitiestobuildhigh-speedroads,trunkroadandtheramptoalleviateurbanareaswiththeneighboringstateoftrafficcongestionhasbecomemoreandmoretrafficmanagementandurbanplanningdepartmentsneedtoaddressthethemainproblem.Nowadays,trafficlightsinstalledineachcrossing,hasbecomethemostcommonanddredgethetraffic,themosteffectivemeans.Thedevelopmentofthesociety,people'sconsumptionlevelunceasingenhancement,privatevehiclesunceasingincrease.Andmorecarsroadsarenarrowroadtrafficisclear.Soadoptingeffectivemethodtocontrolthetrafficlightisimperative.PLCintelligentcontrolprincipleisthecoreofthecontrolsystem,PLCputthethingsdirectionornorth-southdirectionaccordingtoquantityofvehicles,thecorrespondingscalewhatdividesclassgiventhegreenlightdirectionbetweennorthandsouthdirectionaccordingtocertainrulestoolong.Itcanrealizedividesclassaccordingtoagiventhegreencarsdurationscaleofmaximumcarrelease,reducecrossroadsvehicles,easetrafficcongestionstagnation,realizetheoptimalcontrol,soastoimprovetheefficiencyofthetrafficcontrolsystem.TheapplicationofPLCiscontinuously,anddrivetothedeepeningtraditionalcontroltestnewmonthbenefitupdates.Itissimpleinstructure,programmingandhighreliabilityetc,convenientalreadywidelyusedinindustrialprocessesandpositionintheautomaticcontrol.DuetouseofPLChasthecharacteristicsofenvironmentaladaptable,anditsinternaltimerisveryrichinresources,butthecurrentwidelyusedprogressivelights,especiallyforprecisecontrolmorethanthecrosswaycontrolcanbeeasilyrealized.SonowincreasinglyapplyingPLCtrafficlightsystem.Meanwhile,PLCitselfalsohascommunicationnetworkingfunction,willthesamepathaspartofaLANsignalunifieddispatchingmanagement,canshortenthetrafficwaittimes,realizescientificmanagement.Inreal-timedetectionandautomaticcontrolofPLCapplicationsystem,PLCisoftenusedasacorecomponents.Inthe21stcentury,PLCwillhavegreaterdevelopment.Technically,thecomputertechnologycanmorelynewachievementsusedinprogrammablecontrollerdesignandmanufacturing,therewillbefaster,storageandlargercapacity,intelligentstrongervarietiesappear;Lookfromproductsize,canfurthertominiandsuper-largedirection;Lookfromproductcompatibility,thevarietyofourproductswillbemorerich,specificationmorecomplete,perfectman-machineinterfaceandcompletecommunicationequipmentcanbetteradapttoallkindsofindustrialcontroloccasiondemands;Lookfromthemarket,allcountriestotheirproductionofmultipleproductswithinternationalcompetitionintensifiesandbreak,canappearafewbrandmonopolyinternationalmarketsituation,canappearinternationalgeneralprogramminglanguages;Judgingfromthedevelopmentofthenetwork,programmablecontrollerandotherindustrialcontrolcomputernetworkingconstitutealargecontrolsystemisprogrammablecontrollertechnologydevelopmentdirection.ThecurrentcomputerdistributedcontrolsystemDCShasalreadyalotofprogrammablecontrollerapplications.Alongwiththedevelopmentofcomputernetwork,theprogrammablecontrollerasautomationcontrolnetworkandinternationalgeneralnetworkwillbeanimportantpartoftheindustryandindustry,thenumerousfieldsoutsideplayanincreasingrole.InChinatheincreasingamountofmotorvehicles,manybigcitieslikeBeijing,Shanghai,nanjingandothergroundappearedtrafficoverloadrunningcondition,trafficaccidentsproblemalsomoreandmoreserious.Andbecausethevariousspecialvehicles(suchasanambulance,119120car,policeandvariousspecialvehicle110inemergencysituations,byredunderlimitedtotrafficbringalotofinconvenience,evencausetrafficaccident.Andnow,mosttrafficlightsatthesamemomentwillappeartwoormorethantwodirectionatthesametimeforthegreensituation,andincreasetheincidenceofthetrafficaccident.Therefore,designakindofdesignedforspecialvehiclesthroughandnotcauseanytrafficaccident,normaltrafficcontrolanytimeonlyonedirectionofmodernintelligenttrafficlightgreentrafficcontrolsystemisurgentlyneeded.交通灯与PLC随着经济的发展，车辆的数目不断增加，道路堵车现象日益严重，智能交通灯就应运而生了。目前世界上的智能交通系统存在的问题是：系统结构庞大、管理困难、维护投入大等。为了改善现有的交通状况，并克服现有智能交通系统的缺点我设计了城乡交通灯模拟控制小型化的智能交通灯。它具有小型化、智能化、维修投入小