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1、摘要近幾年來(lái),隨著人民生活水平的日益提高,城市中的車輛日益增多,以及由此產(chǎn)生的交通阻塞、工作效率降低等問(wèn)題也日趨嚴(yán)重;通過(guò)車載定位與監(jiān)控系統(tǒng),對(duì)市區(qū)內(nèi)的車輛進(jìn)行有效的指揮和監(jiān)控,可以有效的緩解交通緊張狀況,對(duì)合理的分配、調(diào)度資源、震懾針對(duì)于車輛的犯罪等都有著重要的意義。本文首先對(duì)全球衛(wèi)星定位系統(tǒng)(GPS)的定位技術(shù)進(jìn)行了介紹,對(duì)GPRS移動(dòng)通信系統(tǒng)及進(jìn)行了論述,對(duì)ARM處理器進(jìn)行了詳細(xì)介紹,在此基礎(chǔ)上,本文主要介紹車載監(jiān)控終端研發(fā)中的兩個(gè)方面的工作:1.車載監(jiān)控終端核心板的硬件設(shè)計(jì):介紹采用ARM7核的LPC2104的特性;GPS信號(hào)接收機(jī)的基本結(jié)構(gòu)、主要功能、接口定義;GPRS
2、模塊的開發(fā),針對(duì)wavecomQ2403模塊的數(shù)據(jù)接口、數(shù)據(jù)傳輸形式、引腳功能及與LPC2104的接口設(shè)計(jì)作了相應(yīng)的介紹;為滿足各個(gè)芯片不同的電源要求設(shè)計(jì)電源電路;系統(tǒng)采用模擬總線技術(shù)擴(kuò)充兩個(gè)串口來(lái)彌補(bǔ)LPC2104的串口不足;用Flash來(lái)存儲(chǔ)定位數(shù)據(jù)和監(jiān)控中心發(fā)來(lái)的消息。2.詳細(xì)介紹了車載監(jiān)控終端的外圍設(shè)備設(shè)計(jì),包括紅外電話撥號(hào)器,音頻放大電路、LCD顯示屏等的設(shè)計(jì)。另外對(duì)LCD軟件體系結(jié)構(gòu)和顯示屏消息菜單也做了相應(yīng)的介紹。最后,對(duì)本文所設(shè)計(jì)的系統(tǒng)進(jìn)行了一系列的GPS定位和定位信息的傳輸實(shí)驗(yàn),并對(duì)外圍設(shè)備進(jìn)行測(cè)試,系統(tǒng)性能性能穩(wěn)定,達(dá)到了設(shè)計(jì)要求。關(guān)鍵詞:全球定位系統(tǒng);GPR
3、S;車載監(jiān)控;嵌入式操作系統(tǒng)IVAbstractInrecentyears,alongwiththelevelofpeople'slifeisincreasingdaybyday,thecityofincreasingvehicle,andtheresultinginatrafficjam,workproductivityareyueisserious;Throughthecarpositioningandmonitoringsystem,thevehicleintheeffectivecommandandcontrol,caneffectivelyrelievetraffice
4、mergencies,reasonableallocationofresources,scheduling,stunningbasedonthevehiclecrimeandsoon,allhavetheimportantmeaning.Thispaperfirsttotheglobalpositioningsystem(GPS)positioningtechnology,introducesGPRSmobilecommunicationsystemandwerediscussed,ontheARMprocessorcarriedonthedetailedintroduction
5、,basedonthis,thispapermainlyintroducestheon-boardmonitorterminalofthedevelopingtwoaspectsofwork:1.Thecoreofthemonitorterminalboardhardwaredesign:ARM7introducedthecharacteristicsofthenuclearLPC2104;GPSsignalreceiverofbasicstructure,mainfunction,theinterfacedefinition;GPRSmoduledevelopment,forw
6、avecomQ2403moduledatainterface,datatransmissiontypes,pinfunctionandandLPC2104interfacedesignforthecorrespondingintroduction;Tomeetthedifferentrequirementsofeachchippowersupplypowersupplycircuitdesign;BysimulatingsystembustechnologytomakeupfortwoserialportexpansionLPC2104serialportisinsufficie
7、nt;UseFlashtostorepositioningdataandthemonitoringcenteronthenews.2.Detailedintroducestheon-boardmonitorterminaloftheperipheralequipmentdesign,includinginfraredphonedialer,audioamplifiercircuit,LCDdisplayscreens,etcdesign.InadditiontoLCDsoftwa