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1、毕业设计（论文）附录附录TheresearchesofGPS/GSMsuperviseandcontrolsystemofvehicle1.SummarizationThecurrentsuperviseandcontrolsystemofvehicleisakindofhigh-technology.TheGPSsupervisionandcontrolsystemwhichusingGPSreception,wirelesscommunication,GIStosupervise,queryandsuperintendtheinformationofthemobile
2、user’sdynamicposition(longitude,latitude),time,status,etc.Dividingaccordingtothesubfunction,thesupervisionandcontrolsystemofvehicleiscomposedofthreeparts:positioningpart,communicationpart,anddisplaypart.Thereinto,theoften-usedcommunicationmodesareVHF/UHFsinglechannelcallweb,competitivegro
3、ups’communication,andGSMshortinformationtraffic.ThesupervisionandcontrolsystemofvehiclebasesonVAF/UHFsinglechannelcalweb,it'sdesign,organizingwebandusingisrelativelysimple,butit'sworkingrangeisrelativelysmall;thatGSMshortinformationtrafficisusedinpositioningdatatransmitispopular,it'scover
4、ageiswide,allowingroamingthroughouttheland,whereas,it'stimedelayproblemisthebottleneckthatlimitsit，development,furthermore,it'scallfunctioncannotcomparewiththecollectivegroupssystem;Collectivegroupsystemisdedicateddispatcherandsuperintendencesystem,ithasunspeakableadvantagetosomeparticula
5、renterprise.Butgatheragroupofsystemstobuildthepriceatimetoohighandcoverthescopeissmall;LongrangedatathatGSMthatshortinformationbusinessusedforthefixedpositiondatatodeliverisnowthanforpopular,thecoverscopeisbig,canthewholenationtravelextensively,andcanrealizethesmallbatchquantity,it'sconfi
6、rmabletimedelay,fromthesafety,stability,receiveanddispatchtheinformationtomeasure,canexpand，usingtheexpenses,twotimesdevelopmentetc.Theaspectisallandveryideal,andsuffertheenvironmentinfluencesmall,cansufficiencydemandthatsatisfythecustomer.Butthe毕业设计（论文）附录systemthatit’stimedelayproblemisa
7、bottlenecktoinviteitsdevelopment.ThistextdesignandletterwaythatGSMshortinformationbusinessmethodbottomcoinmountainstripmineGPSthevehiclesuperviseandcontrolthesystemtomakeuseoftowaittheaspectproceedingtheintroduction.2.GSMshortMessagebusinessThemostbasicbusinessofGSM
