车载实时路况信息接收终端的设计与实现

发布时间：2018-11-19 19:38

【摘要】：近年来,随着国内经济发展,国内汽车的保有量迅速增长,随之而来是城市的交通拥堵严重。但是经过调查人们发现,即便是在交通高峰时期,城市道路也并不是全部都发生交通拥堵,有相当一部分道路交通仍然很通畅。因此本文在研究嵌入式系统的基础上,提出了一种可以接收实时路况信息的车载可移动设备,该设备将电子地图固化在Rom中,通过GPRS连接到交通信息服务器,将接收到的信息显示在电子地图上,能够给出行者提供直观的路况,人们可以避开交通繁忙拥堵的路段,选择合适的出行路线,以达到解决出行难的问题。本课题开发平台选择使用Linux+Qt4.8.0,系统内容分为路况信息发送服务器和路况信息接收终端。路况信息发送服务器由一台接入Internet网络的PC机和运行在上面交通信息发送程序组成。该发送程序具有图形化界面,可以根据不同的交通路况信息进行广播发送。路况信息接收终端硬件以友善之臂公司的Tiny210V2嵌入式开发板为基础,添加了GPS模块和GPRS模块。终端设备的电子地图采用MapInfo公司的地理数据包,MapInfo电子地图格式是目前使用最为广泛的矢量地图格式之一,本文通过对MapInfo的矢量地图格式研究,使用第三方开源C++库Mitab对MIF格式地图数据文件进行处理,并使用Qt编写了兰州市区电子地图。之后研究了基于Linux操作系统的串口读写,编写了GPS数据提取程序,通过串口获取GPS数据,结合电子地图完成了定位功能。最后使用GPRS无线通信网络,使用Qt的监听事件对接收的路况信息进行解析,并将路况和详细事件信息定位于相应的路段上,实现了路况信息在电子地图上的动态更新显示。
[Abstract]:In recent years, with the development of domestic economy, the number of domestic cars has increased rapidly, followed by serious traffic congestion in cities. But even during the rush hour, not all urban roads are congested, and a considerable number of roads are still clear. Therefore, based on the research of embedded system, this paper puts forward a kind of vehicle-mounted mobile device which can receive real-time road condition information. The device solidifies the electronic map in Rom and connects to the traffic information server through GPRS. Displaying the received information on the electronic map can provide an intuitive road condition for the travelers. People can avoid the heavy traffic congestion and choose the appropriate route to solve the problem of travel difficulties. The development platform of this topic chooses to use the Linux Qt4.8.0, system content to divide into the road condition information sending server and the road condition information receiving terminal. The traffic information sending server consists of a PC machine connected to the Internet network and a traffic information sending program running on it. The program has a graphical interface and can broadcast according to different traffic information. The hardware of the terminal is based on the Tiny210V2 embedded development board of the friendly arm Company, and the GPS module and the GPRS module are added. The electronic map of the terminal equipment adopts the geographic data packet of MapInfo company. The MapInfo electronic map format is one of the most widely used vector map formats at present. This paper studies the vector map format of MapInfo. The third party open source C library Mitab is used to process the map data file of MIF format, and the electronic map of Lanzhou urban area is compiled by Qt. After that, the serial port reading and writing based on Linux operating system is studied, the GPS data extraction program is written, the GPS data is obtained through the serial port, and the positioning function is completed with the electronic map. Finally, the GPRS wireless communication network is used to analyze the received road condition information by using the monitoring events of Qt, and the road condition and detailed event information are positioned on the corresponding road sections, and the dynamic updating display of the road condition information on the electronic map is realized.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP368.1

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