一个汽车导航动态交通服务系统的设计与实现

发布时间：2018-04-01 20:01

本文选题：汽车导航　切入点：动态交通信息　出处：《华中科技大学》2014年硕士论文

【摘要】：智能交通系统（ITS）是未来交通系统的发展趋势，动态交通信息服务是缓解道路交通压力的有效手段。传统静态交通信息主要指路网信息、建筑设施信息等，而动态交通信息则是指交通流量、交通事件等实时交通信息。在静态路网信息的基础上考虑实时交通信息，可以为出行车辆规划出最优行驶路线，减少路途时间，提高路网运行效率。与传统汽车导航系统不同，动态导航系统采用客户端服务器（C/S）的服务模式，由导航终端和服务中心两部分构成。服务中心是动态交通信息服务的关键，负责动态交通信息的接收、处理和发布。导航终端通过接收由服务中心发布的实时交通信息来完成动态交通信息的地图显示，动态交通信息的路径规划与道路诱导。动态信息的传输采用无线网络传输技术，延时小，可靠性高。导航地图数据采用分层分块的存储结构，把整张地图数据以格网的形式来分区管理，显著提高了地图数据的读取和检索速度，并且更加适用于电子地图在线增量更新技术。为了保存动态交通信息，设计动态导航系统数据库，在地图数据点、线、面要素中加入有效时间字段，，通过动态交通信息表存储实时交通信息。由此设计的导航系统能够周期性获得行车位置附近的实时路况信息，将这些信息描画在导航终端的屏幕上。在进行路径规划时，导航系统根据周围路段的动态交通信息来计算路段花费(cost)，得到的最优路径比根据静态路网数据得到最优路径准确性更高。同时在道路诱导过程中，当动态交通信息发生变化时，系统可以重新进行路径规划，引导行车按照新的最优路径行驶。通过系统功能和性能测试可以证明动态交通信息服务系统是一种行之有效的汽车导航系统解决方案。
[Abstract]:Intelligent Transportation system (its) is the development trend of future transportation system. Dynamic traffic information service is an effective means to relieve road traffic pressure. Traditional static traffic information mainly refers to road network information, building facilities information, etc. Dynamic traffic information refers to real-time traffic information, such as traffic flow, traffic events, etc. Considering real-time traffic information on the basis of static road network information, we can plan the optimal route for travel vehicles and reduce the travel time. Improve the efficiency of network operation. Different from the traditional automobile navigation system, the dynamic navigation system adopts the client server / C / S service mode, which is composed of two parts: the navigation terminal and the service center. The service center is the key of the dynamic traffic information service. It is responsible for receiving, processing and publishing dynamic traffic information. The navigation terminal completes the map display of dynamic traffic information, the path planning and road guidance of dynamic traffic information by receiving real-time traffic information issued by the service center. The transmission of dynamic information is based on wireless network technology with small delay and high reliability. The navigation map data is stored in layers and blocks, and the whole map data is managed in the form of grid. In order to save the dynamic traffic information, the database of dynamic navigation system is designed, the map data points, lines, lines, map data points, lines, map data points, lines, map data points, lines, map data points, lines, map data points, lines, map data points, lines, map data points, lines, The effective time field is added to the surface element, and real-time traffic information is stored through the dynamic traffic information table. The designed navigation system can periodically obtain real-time road condition information near the driving position, which is depicted on the screen of the navigation terminal. According to the dynamic traffic information of the surrounding road, the navigation system calculates the cost of the road, and the optimal path is more accurate than the static road network data. At the same time, in the course of road guidance, when the dynamic traffic information changes, The dynamic traffic information service system can be proved to be an effective solution for vehicle navigation system through the system function and performance test.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U495;TP311.52

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