簡介:2009INTERNATIONALCONFERENCEONMULTIMEDIAINFORMATIONNETWORKINGANDSECURITYDESIGNOFTRAFFICLIGHTSCONTROLLINGSYSTEMBASEDONPLCANDCONFIGURATIONTECHNOLOGYLIUYANJELECTRICALPOWERDEPARTMENTWUHANELECTRICALPOWERTECHNOLOGYCOLLEGEWUHAN,CHINAELICYLIUSOHUCOMABSTRACTAKINDOFTRAFFICLIGHTSCONTROLLINGSYSTEMBYUSINGPLCWASDESIGNED,ANDTHEAUTOMATICCONTROLOFTHETRAFFICLIGHTSWASPERFORMEDBYSOFTWAREINTHESYSTEM,THEORIGINALRELAYWIRINGWASREPLACEDBYTHEPROGRAM,ANDTHEHARDWAREANDSOFTWARERESOURCESOFPLCWEREUSEDREASONABLYTHENORMALLYRUNNINGANDEMERGENCYTRANSPORTWEREINTRODUCEDINDETAIL,ANDTHATTHEEMERGENCIESFROMTHEEASTWESTANDFROMTHESOUTHNORTHCANINTERLOCKTHETRAFFICLIGHTSSIGNALSYSTEMWASDISPLAYEDWITHTWOSEVENSEGMENTDIGITALTUBESINCOUNTDOWNORDERMEANWHILETHEWIRINGOFHARDWAREANDPLCLADDERDIAGRAMWASDISCUSSEDINDETAILSTHEREMOTEMONITORINGSYSTEMOFTRAFFICLIGHTSATTHECROSSROADSWASDESIGNEDWITHCONFIGURATIONSOFTWAREMCGS,WHICHMONITOREDTRAFFICLIGHTSINREALTIMEANDIMPROVEDTHERELIABILITYGREATLYATTHESAMETIME,WECANCHANGETHESTATESOFTHETRAFFICLIGHTSBYTHECONFIGURATIONPICTURECHENXIANFENGSCHOOLOFRESOURCEANDENVIRONMENTENGINEERINGWUHANUNIVERSITYOFTECHNOLOGYWUHAN,CHINACHENXFENG618SOHUCOMTHESTATESOFTRAFFICLIGHTSWERERECORDEDBYTHEMONITORPICTURESSIMULTANEITYURGENCYTRAFFICCONTROLLINGSIGNALSARECONTROLLEDBYURGENCYSWITCHALLTHETRAFFICLIGHTSWORKNORMALLYIFNOURGENCYEVENT,WHICHONLYTURNEDONWHENURGENCYEVENTSOCCURREDUNDERTHISCONDITION,THEURGENCYVEHICLEWASPRIORTOPASSONCETHEURGENCYVEHICLESHAVEPASSEDBY,THEURGENCYSWITCHTURNEDOFFIMMEDIATELYTHENTHEGREENLIGHTATTHESAMEDIRECTIONOFTHEURGENCYVEHICLEFLASHEDTHREETIMES,WHICHSUBSEQUENTLYRANNORMALLYIFTHEREARETWOURGENCIESVEHICLESFROMSOUTHNORTHANDEASTWESTRESPECTIVELY,THEURGENCYTRAFFICCONTROLLINGSYSTEMCANONLYRESPONDTHEONETHATCOMESEARLIER,THENANOTHERONEAIDESIGNOFTRAFFICCONTROLSYSTEMKEYWORDSPLCTRAFFICLIGHTSSDECCONFIGURATIONSOFTWAREMCGSIINTRODUCTIONWITHTHEDEVELOPMENTANDTHEADVANCEMENTOFSOCIETY,THESMOOTHTRAFFICBECOMESMOREANDMOREIMPORTANTONONEHAND,TOOMANYCROSSROADS,INCREASINGLYVEHICLES,ALLWHICHCAUSESERIOUSTRAFFICJAMONTHEOTHERHAND,IT’SNECESSARYTOKEEPFASTANDSAFEFORTHEVEHICULARANDTHEPEDESTRIANINTHELIMITEDTIME1,2THEREFORE,AKINDOFTRAFFICLIGHTSCONTROLLINGSYSTEMWASDESIGNED,WHICHCANBEUSEDTOSHOWTIMECOUNTDOWN,ANDCONTROLREALTIMEDATAWITHCOMPUTERINADDITION,CONFIGURATIONTECHNIQUESWEREAPPLIEDTOREFLECTTHEREALTIMEIMAGESOFTRAFFICLIGHTSANDUNDERSTANDTHEHISTORYOFTHEWORKOFTHECROSSROAD,ANDTHEVISUALIZATIONOFTHETRAFFICLIGHTSCANBEOBTAINEDTHISSYSTEMCONSISTSOFHOSTCOMPUTERANDLOWERCOMPUTERMCGSWASINSTALLEDINHOSTCOMPUTER,ANDTHELOWERCOMPUTERWASCONTROLLEDBYPLCSYSTEM3THENORMALLYTIMESERIESDIAGRAMOFTHETRAFFICLIGHTS4ASSHOWNBYFIG1BUTTHEREARESOMEURGENCY,FOREXAMPLETHEREARESOMEAMBULANCESUSEDTOTRANSPORTPATIENTSTOHOSPITALORSOMEFIREENGINESUSEDTOFIGHTFIRESFIREENGINESANDAMBULANCESHAVEPRIORITYOVEROTHERTRAFFICACCORDINGTOTHECITYTRAFFICCONTROLSYSTEM,TWOCONTROLLINGMETHODSOFNORMALLYCONTROLANDURGENCYTRAFFICWERETAKENINTOACCOUNTTHISPROCESSCANBEDISPLAYEDBYFOURTEENSEGMENTSENCODER9780769538433/092600?2009IEEE1DOI101109/MINES2009176ADESIGNOFHARDWARECIRCUITTHECP1HSERIESPLCWASUSEDASTHECONTROLLER,THEDISPLAYPROGRAMSHOULDSTOPWHENTHESYSTEMRANABNORMALTIMESERIESPROGRAM,ANDTHETIMEWON’TBEDISPLAYEDWHENTHEURGENCYTIMESERIESPROGRAMWASFINISHED,THECOUNTDOWNDISPLAYPROGRAMSHOULDBERESETINTHESYSTEM,220VACWASUSEDTOCONTROLTRAFFICLIGHTSAND24VDCTOCONTROLSEVENSEGMENTENCODER,FIG2SHOWSTHESCHEMEOFEASTWESTTIMEDISPLAYTHECP1HSERIESPLCISASIMPLECONTROLLER,WHICHCONSISTSOFTWENTYFOURINPUTSANDSIXTEENOUTPUTSBECAUSETWENTYOUTPUTSWERENEEDEDINTHISSYSTEM,ONEI/OMODULEMUSTBEEXTENDEDTHEWIRINGDIAGRAMASSHOWNINFIG2FIGURE1NORMALLYTIMESERIESDIAGRAMFIGURE4THECOUNTDOWNDISPLAYPROGRAMCOMMUNICATIONBAUDRATE69600DATABIT07BIT,STOPBIT22BITDATACHECKMETHODSDUALCHECK,SERIALCOMMUNICATIONNUMBERCOM0THESMALLESTSAMPLINGCYCLE200MSTHEPARAMETERSOFPLCWEREDEFINEDASFOLLOWSTHESMALLESTSAMPLINGCYCLEINBASICATTRIBUTES200MSTHREEREADWRITECHANNELSX0,X1,X2SIXREADONLYCHANNELSREADTHESTATESOFTHETRAFFICLIGHTSQ0Q5FOURTEENREADONLYCHANNELSREADTHESTATESOFTHEDIGITALTUBEQ6Q12Q13Q19ALLTHECHANNELSMUSTBECONNECTEDTOTHEVARIABLESDEFINEDINTHEREALTIMEDATABASEACCESSONEBYONEANDOTHERPARAMETERSWITHDEFAULTVALUEAFTERASUCCESSFULCONNECTIONBETWEENPLCANDTHECOMPUTER,THECONTROLLINGSYSTEMWASABLETOCHANGETHECOLOROFANALOGSIGNALLIGHTSINTHEPICTUREONTHEPCBYTHECOLLECTEDDATATHROUGHTHESERIALPORTTHENTHESTATEMONITOROFTHETRAFFICLIGHTATTHECROSSROADWASPERFORMEDINSTEAD,THROUGHCHANGINGTHEPARAMETERSOFTHEHOSTCOMPUTER,THECORRESPONDINGVALUESWRITTENTOPLCTHEINTERNALRELAY,THECONTROLOFTRAFFICLIGHTSATTHEJUNCTIONCANBECARRIEDOUTTHEEXPERIMENTALRESULTSSHOWTHATTHESYSTEMRANNORMALLYANDANIMATIONWASGOODENOUGHTHEONLINEMONITORINGSYSTEMOFTRAFFICLIGHTSASSHOWNINFIG5BICONCLUSIONSTHEEXPERIMENTALRESULTSINDICATEDTHATTHESYSTEMRANNORMALLYANDTHECONFIGURATIONPICTUREWASGOODENOUGHFIGURE5ANIMATIONPICTUREFROMMCGSTHESYSTEMSIMPLIFIEDTHECOMMUNICATIONBETWEENPLCANDHOSTCOMPUTERBYUSINGINDUSTRIALCONFIGURATIONSOFTWARE,WHICHSHORTENEDTHEEXPLOITATIONTIMEGREATLYESPECIALLY,ITISMOREFITFORCOMPLEXCONTROLLINGSYSTEMWECANCONTROLTHETRAFFICLIGHTSBYPLCANDMCGSINSTEADOFTHEORIGINALRELAYCONTROLANDINCREASELIFEEXPECTANCYOFTHISSYSTEMATTHESAMETIME,THEMETHODCANBEAPPLIEDTOCONTROLMOTORSANDLIQUIDLEVELSTHEREMOTECONTROLANDCONFIGURATIONSIMULATIONAREPUTTOGETHERANDCANALSOBEAPPLIEDTOSIMILARCONTROLAREASREFERENCES1XIEKEMING,LIUDALIANG,XIE,JUNAFUZZYLOGICBASEDTRAFFICLIGHTCONTROLSYSTEM10THINTERNATIONALSYMPOSIUMONINTEGRATEDCIRCUITS,DEVICESANDSYSTEMS,ISIC2004INTEGRATEDSYSTEMSONSILICONPROCEEDINGS,2004,PP3413442MAMANAVISHAY,GOLDSCHLAGERSHARON,MILLERHILLELREUSABLEONCHIPSYSTEMLEVELVERIFICATIONFORSIMULATIONEMULATIONANDSILICON11THANNUALIEEEINTERNATIONALHIGHLEVELDESIGNVALIDATIONANDTESTWORKSHOP,2006,PP1191263JAKSIC,NEBOJSAIMPROVINGSELFEFFICACYINENGINEERINGSTUDENTSUSINGPLCBASEDTRAFFICLIGHTEXPERIMENTS2002ASEEANNUALCONFERENCEPROCEEDINGS,2002,PP13409134144QUHONGPRINCIPLEANDAPPLICATIONOFPROGRAMMABLELOGICCONTROLLERBEIJINGCHINAELECTRICPOWERPRESS,20075ITOTOSHIO,SATORIEKO,SHIBATAYASUO,ETCSIGNALPROCESSINGUSINGALLOPTICALWAVELENGTHCONVERSIONAPPLICATIONUSINGHYBRIDINTEGRATEDXPMDEVICEANDSIPAS,NTTTECHNICALREVIEW,APRIL2003,V1,N1,PP5258,6MCGSTRAININGCOURSEBEIJINGBEIJINGKUNLUNCOMPANIES,20073
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