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1、智能交通系统车载终端定位通讯模块研究RESEARCHONCOMMUNICATIONANDPOSITIONINGMODULEINITSVEHICLETERMINALABSTRACTRecentyears,withtherapiddevelopmentofautomobileindustryinourcountry,automobilehasbecomemoreimportant.Itmakespeople’slifemoreconvenient,butalsoitbringsalotoftrouble.Trafficjamismoreserious,traf
2、ficaccidentsoccurmorefrequently,etc.SowehavetobringinITS(IntelligentTransportationSystem)toimprovetheexistingtrafficsystem.ThiscommunicationandpositioningmoduleisavehicleterminalusedinITS.Themajortechniqueincludes:satellite-positioningtechnology,mobilecommunicationtechnology,infor
3、mationgatheringtechnology,mobilestoragetechnology,mechanicalandelectricalcontroltechnology.ThisresearchcomesfromTianJinInnovationFundProject—ModularizedMultifunctionalIntelligentCarborneControllerBasedonGPSand3G.Thismodulecansharedatatotheinternetsupervisedbythemonitoringcenter,so
4、theycanavoidtrafficjams,savetime,reduceenergyconsumption,reduceemissions,increaseefficiency;Oncetrafficaccidentsoccur,trafficpolicecanidentifyresponsibilityquickly,getthetrafficmovingagaininashorttime;Vehiclescanbecontrolledeasily,afterauthorized,monitoringcentercancontrolallcarst
5、houghmobilecommunicationnetwork,etc.Themainworkisasfollowing:1.Accordingtotheneedofthismodule,amethodbasedonGPS,GSM/GPRS,MEMSsensor,Relaycontrol,SDstoragehasbeenproposed,thismethoduseproventechniquestoreducethecomplexityandimprovethestability;2.Accordingtotheneedofvehicleenvironme
6、nt,intheprocess,corechipshavebeenchoosenanddeveloped,coresignallineshavebeentreatedspecially.Doublesidedboarddesign,compactstructure,smallsize,easytodebug.TransplantFAT32tothemodule,developalgorithms,testamentshowsthatthismoduleisverystableinvehicleenvironment;3.Inordertoachieveas
7、tandardcontrol,thecontrolordershasbeenwritteninastandardway,anewprotocolspecificationhasbeendeveloped,includes:startmark,identifiers,content,endmark.Testmentshowsthatthisprotocolspecificationissimpleandpracticable,thismodulecanrespondtoalltheordersquicklyandcorrectly.ii河北工业大学硕士学位论
8、文KEYWORDS:ITS,GPS,mobilecommunica
