GPS汽车定位系统车载终端的设计和实现电子信息工程专业摘要全球卫星定位系统利用导航卫星进行测时和测距,它是一种将卫星及通讯发展很好的结合在一起的技术。全球卫星定位系统(简称GPS)有着很多功能和特点,例如:全天候、高精度、自动化、高效益等。GPS用在大地测量、工程测量、航空摄影、运载工具导航和管制、地壳运动测量、工程变形测量、资源勘察、地球动力学等许多学科中都有着不可取代的优点,并且在经济和社会中都取得了很好的效益。全球定位系统是以空间为基准的导航系统,是由美国国防部研制的一种全天候的,可在全球任何地方或近地空间的军事用户连续地确定三位位置和三位运动及时间的需要方面上提供很好的帮助。它是一个相对于中距离类似圆型的轨道卫星导航系统。GPS全球定位系统是如今信息时代发展中不可缺少的重要部分,在现在生活中已经被广泛应用,而且定位系统是最受欢迎的导航定位系统,因为定位系统具有性能好、精度高、应用广的特点。本设计讨论了在GPS接收系统中关于单片机的设计,并根据现代智能交通系统的工作需求,提出了GPS全球定位系统如何进行定位信息的接收和通过GPRS网络建立无线通信链路问题的相关过程,以及在把车载移动终端的GPS定位信息如何传到建立在Internet网上服务器的问题做了相关的介绍,给出了系统的硬件电路和定位系统传输信息的软件流程图。关键词:GPS;GPRS;单片机ABSTRACTGlobalPositioningSystemisacombinationofsatelliteandcommunicationstechnologydevelopment,theuseofsatellitenavigationandrangingtimemeasurement.GlobalPositioningSystem(GPS)toall-weather,highprecision,automation,highefficiencyandothercharacteristics,successfullyappliedgeodesy,engineeringsurveying,aerialphotography,vehiclenavigationandcontrol,measurementofcrustalmovement,deformationmeasurementproject,resourceexploration,geodynamics,andothersubjects,andachievedgoodeconomicandsocialbenefits.U.S.DepartmentofDefenseGlobalPositioningSystemisanall-weatherresearch,spacebaselinenavigationsystem,canmeetanywhereintheworldorinthenear-Earthspaceformilitaryuserstocontinuouslyandaccuratelydeterminethelocationofthreesportsandthreehoursofneed.Itisamiddle-distancecircularorbitsatellitenavigationsystem.GPSglobalpositioningsysteminthepresentlifehavebeenwidelyused,isnowtheinformationage,animportantpartofthedevelopment.Becausethepositioningsystemhasgoodperformance,highprecisionandwideapplicationofthecharacteristics,ithasbecomethebest,themostpopularnavigationsystem.Thedesignofmodernintelligenttransportationsystembasedonworkrequirements,discussestheGPSreceiveronthesinglechipsystemdesign,presentedontheglobalpositioningsystemGPSlocationinformationreceivedandthroughtheGPRSnetworktoestablishawirelesscommunicationlink,theGPS-vehiclepositioningmobileterminalsInformationpassedtoestablishtheInternetwebserver,givenasystemofhardwareandsoftwareflowchart.KeyWords:GPS;GPRS;SCM目录第一章引言....................................................................................................11.1课题研究的意义...............................................................................11.2中国车载研发现状和发展趋势........................................................1第二章GPS全球卫星定位系统...................................................................22.1GPS系统结构....................................................................................22.1.1GPS空间段............................................................................22.1.2GPS地面段............................................................................42.1.3GPS用户段..........................................................