基于VC开发的智能交通诱导系统

上海交通大学硕士学位论文基于VC开发的智能交通诱导系统姓名：鲍磊明申请学位级别：硕士专业：控制理论与控制工程指导教师：路林吉20070101IIVCVCARM7CSocketVisualC++/IIIVCSocketIVANINTELLIGENTTRAFFICGUIDINGSYSTEMDEVELOPEDWITHVCABSTRACTThepaperintroducesanintelligenttrafficguidingsystemdevelopedwithVC.Thewholesystemconsistsofthreeparts,includingfront-endcrossroadtrafficlightcontrollers,sensorsandmonitorprogram.Somepracticalmethodscontrollingthesinglecrossroadaredisscused.Moreresearchhasbeendoneontherealizationandoptimizationofthesystem.Asaresult,practicalcontrollingmethodshavebeenachieved.Thissystemmodelsbilateralfourlanesandtheparametersaresetaccordingtotheusualfour-phasesystem.Thesystemmainlyusesthreekindsofsignalcontrolmethods,suchastimingcontrol,inductivecontrolandadaptivecontrol.Thetimingcontrolrefreshesthetrafficlightsignalparametersinthesameinterval.Theinductivecontrolisusedtomeasurethecurrentvehicleflowinordertodisplaythetrafficstatus.Andtheadaptivecontroladaptsthetrafficlighttimesequencesaccordingtothevehicleflow.Theoptimizedalgorithmbasedonthesignalcrossroadadaptstheeachcrossroadtrafficlighttimesequences.VThefront-endcrossroadtrafficlightcontrollerandsensormakeupoftheforegroundsystem.Theembeddedtechniqueisusedtodevelopthecontroller.ThecontrollerisbasedonARM7,absolutelyprogrammedwithC.Ithastwofunctions.OneisCommunicationwithmonitorprogramthroughSocket.Theotheristocontrolthepresentlights.Thesensorfunctionistomeasurethecurrentvehicleflow,andthedataarecommunicatedtothecontrollerthroughamicrocomputer.ThemonitorprogramisdevelopedwithVisualC++.Itcandisplaythetrafficreal-timestatusofeachcrossroadoreachroadandchangethedataaboutthewholetrafficnet.Theprogramcancontrolonefront-endcrossroadcontrolleroncetime.Theprogramincludesanadaptivealgorithmwhichcanadaptthefront-endcrossroadcontrollersautomaticallyaccordingtothevehicleflowsothattheintersectionefficiencywillbeimprovedandthetrafficpressurewillberelieved.Thepurposeofthestudyistointroducethemainideaofthesystemdesignandthesystemarchitectureindetail.Whilethehardwareiscomparativelysimplyintroduced,thesoftwareispaidmoreattentiontodiscuss.Inthepaper,themainprocesswillbefocusedonandthefunctionsachievedwillbedescribedindetail.KEYWORDS:intelligenttrafficsystem,embeddedtechnique,front-endcrossroadcontroller,VC,Socket200722620072262007226110020(IntelligentTransportationSystems)ITS[1]30ITS80ITSITSITSITS[2]ITS(UrbanTrafficFlowGuidanceSystemUTFGS)(DynamicRouteGuidanceSystemDRGS)2100(ITS)(GlobalPositionSystem)(GeographicInformationSystem)(ElectronicMapofTrafficNetwork)1.118681918195919643100[3]SCAT[4]701973TRANSYT801.2[5]1/360%4100[6]1.3601975[7]CYRANO(Cycle-freeresponsivealgorithmfornetworkoptimization)20705100TRANSYTSCOOTSplit,CycleandOffsetOptimizationTechnique1975SCOOTTRANSYTTRAN5YT70(RTA)SCATS(SydneyCoordinatedAdaptiveTrafficSystem)1980SCATSSCOOTSCATS[8](Rollinghorizon)t()tt1.4(CTRRL)1966TRANSYT70SCATS6100TRRL1973SCOOT[9]TRANSYTSCOOTSCAT[10]:1()2TRANSYT[11]SCOOTSCAT[12]341.5[13](1)(2)(3)(4)7100(5)[14]:[15]:1.2.3.1.6[16]VCARM81002.12.1.1(signalcontrol)[17][11]1(CycleLength):CCG+A+R(2-1)C()G()A()R()251204s35s2(Split):9100G/Cλ(2-2)3(Phase):4(Offset):2.1.2[18]:[19]:()101002.22.2.1LittleMAXBANDPillaiGartner[20]01.5L5C1Y−(2-3)LYLYniliritL[21]ri1L(l+t)nii=∑(2-4)1YYnii=∑iiiYq/s(2-5)11100iYiiqisi0C0.750C1.50C(2.3)0C()200s(2.3)[22]2.2.2:121002.2.31.:(1)(2)(3)2.:(1)(2)(3)131002.3[23]2.3.1:()[24]:(1)14100(2)(3)(4)2-1Figure2-1Chartofthehalf-inducedcontrol2.3.2151002.3.3[25]12316100456VideoImageProcessor,VIP/VIP789171002.3.42.3.4.1(1)(2)(3)(4)(5)2.4.3.2[26]2.4181003.1PHILIPSARMTCP/IP3-15VPhilipsARM7LPC2214LDOLCM(SMG240128A)JTAGSRAM4MbitRS-232RS-485ZNE100SerialtoEthernetDS1302I2CEEPROM22163-1Figure3-1Structureofthetrafficcontroller[27]19100CPUSMG240128LCMZNE-100RS-232CTCP/IP[28]3.2ARM73-2Figure3-2Schematicdiagramoftheleastsystem3-2[29]3.2.1LPC2214ARMLPC221416/32ARM7TDMI-SCPU20100256KFlash1283216Thumb30%LPC221414432810ADCPWM9POSLPC221476GPIOmodemLPC22143-33-3LPC2214Figure3-3ModulesofLPC2214211003.2.1.1LPC2214ARM7TDMI-SCPUARM7AMBA(AHB)VLSI(VPBARMAMBA)LPC2214ARM7TDMI-S(little-endian)AHB2M4GARMAHB16kLPC2214VPBAHBVPBVPBAHBVPB2MVPBVPB16k3.2.1.2ARM7TDMIARM(RISC)ARMARM7TDMI33ARM7TDMI-STHUMBThumbARM7TDMI-S32ARM16THUMBThumb16ARMARMThumbARM65%16ARM160%ARM7ARM7TDMI73.2.1.3LPC221422100LPC2214256KFLASHFLASHJTAG(ISP)UART0(IAP)FLASHLPC221416kBRAM/SRAM81632SRAMCPUSRAMSRAMSRAMSRAMSRAMSRAMARMLDR/STRFlash(NOR)LDRSTRFlashFlashLPC2214LPC2214ARM7BootBlockSRAMBootBlockFlashBootBlockBootBootBlock(32)320x000000000x0000003FSRAMBootBlock231001.FlashFIQ2.SRAMBootBlock3.3.2.2LPC221443.3V1.8V3.3V1.8V43.3V1.8V5V5V3.3V1.8VLDOLDOSPX1117M3-1.8SPX1117M3-3.3800mA1%3.2.3LPC2214XTAL1XTAL211.0592MHz20pF241001MΩ3.2.4ARMSP708SSP708+3.0V+3.3VuPIOLPC22143.03.6V2.93V3-4figure3-4Theresetcircuit3-4nRSTLPC2214RESETnTRSTLPC2214JTAGTRSTRSTSP708SRST74HC125A2510074HC125BnRSTnTRSTSP708SRST74HC125A74HC125BR3R4nRSTnTRSTJTAG3.2.5LPC2214JTAGARM20JTAGJTAG3-5LPC2214JTAGnRSTnTRST3-5JTAGLPC2214Figure3-5JTAGsignaldefinitionanditsconnectionwithLPC22143.33.3.13.3.1.1LCD26100LCDModuleLCMLCMPCBSMG240128A240*128/STN32