【作者】 徐晖；

【导师】 全书海；

【作者基本信息】 武汉理工大学 ， 控制理论与控制工程， 2008， 硕士

【摘要】 汽车导航及定位是在全球卫星定位系统(GPS,Global Positioning System)的基础上发展起来的一门新型技术。它是由GPS定位系统、电子地图、嵌入式系统组成。汽车导航系统接收GPS所传送的卫星信号,得到车辆的即时位置,通过GPS信号处理系统传送给CPU,再配合嵌入式系统上的电子地图,将车辆经过的轨迹显示在显示屏上。本文设计了一种汽车导航定位系统,以ARM微处理器为核心,移植嵌入式操作系统,在此基础上绘制电子地图,显示车辆运行轨迹。主要研究内容如下:完成了车载导航系统总体方案的分析与设计。分析了多种嵌入式微处理的性能和应用。确定了以S3C44BOX为核心构建导航系统硬件平台的解决方案,并设计了导航系统的总体框架。完成了车载导航系统硬件平台的设计,包括存储器系统、通信总线、GPS模块等接口电路的设计。根据高速数字电路的设计要求,在双面板上实现了基于ARM的汽车导航定位系统的PCB布线。编写了系统初始化代码,完成了对硬件平台的调试工作。根据系统的实际情况,选择了实时多任务操作系统μC/OS-Ⅱ和嵌入式图形用户界面μC/GUI作为本系统的软件平台,完成了两者在系统硬件平台上的移植。针对μC/GUI环境下简体中文汉字的显示问题,给出了一种比较完善的解决方案。介绍了GPS的卫星定位原理,以及GPS接收的数据格式。在嵌入式图形用户界面μC/GUI的基础上实现车载导航系统LCD上电子地图的绘制,提出了基于μC/GUI及MapInfo MIF地图数据格式的电子地图的设计与实现方法。实现了矢量电子地图的显示、缩放、漫游、图层管理以及简单的数据查询导航功能,提出了用边界检测算法提高电子地图漫游时的显示速度。在此开发平台上还实现了GPS定位数据的采集、处理,初步完成了定位模块的部分功能。更多还原

【Abstract】 The automobile guidance and the localization are in the whole world satellite positioning system (GPS, Global Positioning System) in the foundation develops a new technology. It is by the GPS positioning system, the electronic map, the embedded system is composed. The automobile guidance system receives the satellite signal which GPS transmits, obtains vehicles’ immediate position, transmits through the GPS signal processing system gives CPU, coordinates on embedded system’s electronic map again, vehicles process track display on display monitor. This article proposed one kind of entire liquid crystal’s automobile guidance positioning system plan, take ARM the microprocessor as a core, transplants the embedded operating system, based on this draws up the electronic map, demonstrates the vehicles movement path. The main research content is as follows:Completed the vehicle to carry the guidance system overall concept the analysis and the design. Analyzed many kinds of inserting to decline processing the performance, the application and the price. Had determined take S3C44BOX as the core construction guidance system hardware platform solution, and has designed guidance system’s overall frame.Completed the instrument system hardware platform design, including interface circuit’s and so on memory system, correspondence main line, GPS module designs. According to the high speed figure electric circuit’s design requirements, have realized on the double kneading board based on the ARM automobile guidance positioning system’s PCB wiring. Completed the system initialization code, completed to the hardware platform debugging work.Introduced the GPS satellite positioning principle, as well as GPS receive data format. Realizes the vehicle in the embedded graphical user interfaceμC/GUI foundation to carry on guidance system LCD electronic map’s plan, proposed map data format’s electronic map’s design with realizes the method based onμC/GUI and Maplnfo the MIF. proposed enhances the electronic map with the boundary detection algorithm to roam the time demonstration speed. In this developed in the platform also to realize GPS locator data gathering, processing, has completed the localization module partial functions initially.According to system’s actual situation, has chosen the real-time multi-duty operating systemμC/OS-II and the embedded graphical user interfaceμC/GUI takes this system’s software platform, has completed both in the system hardware platform transplant. In view ofμC/GUI the environment under the simplified Chinese character’s demonstration question, has given one kind of quite perfect solution.更多还原