| Vehicle positioning system is the important constituent of vehicle positioning and navigation system.By analyzing on the currently available status of vehicle positioning system, the paper proposes solutions of vehicle positioning based on GIS technology, and has designed a set of embedded vehicle positioning system terminal.This paper firstly completes the function designs of all systems, and proposes a set of system designs of hardware and software platform. Hardware components include: using S3C2440A processor, SDRAM, NandFlash and some peripheral circuits as the central processing system, designing the expansion circuit of component system which is composed of 7-inch LCD touch screen interface circuits, SD card circuit, GPS module circuit and power circuit. Software components include: a platform of embedded Linux development is set, a cross-compiler tool chain is established, the core is cut and transplanted, a root file system is built, and a QT / E graphics interface development environment is set. While taking advantage of MapInfo software processes the GIS data, programming achieves reorganization of the GIS data extraction and data structure, and programming on this basis to achieve the various features of the system.The paper achieves the task of hardware and software of vehicle positioning system, and the accordingly testing and debugging to verify the feasibility of the design. Finally, clear the direction of future efforts, according to the encountered problems in the experiments. |
