基于51单片机的GPS接收机摘要全球定位系统(GPS)是由美国国防部开发的一种先进的无线电导航系统。该系统能够全天候、全方位的为海陆空用户提供连续的、高精度的三维坐标、三维速度和时间等信息。它所具有的诸多优点是其他导航设备所无法比拟地。现在，GPS接收机作为一种先进的导航和定位仪器，已在军事及民用领域得到广泛的应用。本设计详细介绍了一种成本低又能满足性能使用要求的经济型GPS接收机的设计方案。此方案基于单片机、GPS模块和1602液晶显示屏等硬件,并应用C语言实现了GPS信号的提取、显示及基本的键盘控制操作等。经过实践测试,这种接收机可以达到基本GPS信息接收以及显示，可以做到体积小、精度高、连续导航，并可广泛应用于个人野外旅游探险、出租汽车定位及海上作业等领域。关键词：GPS，单片机，接收机，GR-87，LCDIDESIGNOFGPSRECEIVERBASEDON51SINGLECHIPCOMPUTERABSTRACTGlobalPositioningSystem(GPS)isthemostadvancedradionavigationsystemwhichwasdevelopedbytheU.SDepartmentofDefence.Thesystemcanbeusedunderanyweatherconditions,alldaylongandanywhereontheearth.Itcanprovideland,marineandairborneuserwithcontinuous,highlyaccuratethree-dimensionposition,velocity,timedataetc.Ithasvariousadvantagesthatareunexampledotherkindofnavigationequipment.NowGPSreceivers,asatypeofadvancedequipmentonnavigationandpositioning,havebeenwidelyusedinbothmilitaryandcivilfield.Thisdesignintroducedindetailonekindoflow-costeconomyGPSreceiver'sdesignproposalwhichcansatisfytheperformanceoperationrequirements.Thisplanisbasedonsinglechipcomputer、GPSand1602liquidcrystaldisplaymonitors,andhasrealizedtheGPSsignalextraction,thedemonstrationandthebasickeyboardcontroloperationandsoonusingtheClanguage.Bypracticalmeasurement,thereceivercanachieveGPSinformationreceiveanddisplay.Ithassmallsizeandlowcost,canbeusedinwildadventuretourism,taxipositioningandoperationsatsea.KEYWORDS:GPS，singlechipcomputer，receiver，GR-87，LCDII目录前言..............................................................................................3第1章GPS系统简介及设计方案选择.............51.1GPS系统简介.............................................................51.1.1GPS由来及发展.............................................51.1.2GPS定位基本原理.......................................51.1.3GPS接收机定位流程................................61.1.4任务的描述.......................................................61.2设计方案选择..........................................................61.2.1方案一....................................................................71.2.2方案二....................................................................7第2章系统硬件设计.......................................................82.1单片机..............................................................................82.2GPS模块..............................................................................92.2.1概述..........................................................................92.2.2主要技术参数................................................92.2.3管脚介绍.............................................................92.3显示部分....................................................................102.4电源部分....................................................................112.5晶体振荡器.............................................................112.6键盘部分....................................................................12第3章系统相关协议介绍.......................................133.1GR-8...
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