智能车载GPS/GSM系统及其在车辆定位中的应用

【作者】 周贵伟；

【导师】 史忠科；

【作者基本信息】 西北工业大学 ， 交通运输规划与管理， 2003， 硕士

【摘要】 本文涉及一种车载GPS接收记录装置，属于电子信息技术、自动控制技术、汽车技术，是在汽车上实现GPS数据的接收和记录，并在上位机中用电子地图再现车辆在过去一段时间里所经过的地方，以实现管理车辆的目的。本论文首先对车辆定位与导航系统的原理进行简单的叙述，而后介绍了车载定位单元的软件设计和硬件设计，在论文的最后还对车辆定位精度的提高作了简单研究。 在车载GPS的设计中，本文分两章分别叙述了硬件设计和软件设计。在硬件设计方面，介绍了以MCS-51单片机为核心，应用MOTOROLA D15手机模块和GARMIN OEM板，设计GPS接收机的主控电路板。在软件设计方面，介绍了主程序的编写、主控板与GPSOEM板之间通信程序的编写、FLASH卡的擦除和读出程序的编写、GSM短消息发送程序的编写，以及将FLASH卡中的数据发送到上位机程序的编写。 尽管全球定位系统已是目前精度最高的无线电导航系统，但仍有许多用户不满足于GPS的原始精度，希望获得更高的性能。基于输出的数据处理就是一种广泛采用的技术。本文最后一节先是对车辆定位与导航系统的误差来源作了较详细的叙述，而后使用中值滤波方法来提高定位精度，仿真结果表明此方法是有效的，最后，编写了中值滤波的汇编程序，将此程序移植到车载GPS机中，从而提高了GPS接收机输出数据的定位精度。更多还原

【Abstract】 In this dissertation, a GPS receiver device with record memory is proposed, which is used in the fields of electronic information, automatic control and automobile industry.By receiving data from a GPS OEM Broad, storing the data in the record memory, and displaying where the automobile was in the past a month using the electronic map in the computer, the administration of a group of automobiles is realized. Firstly, the theory of the vehicle positioning and navigation is presented with briefness.Secondly, the hardware design and the software design for the GPS receiver device is introduced. Lastly, a study on the accuracy of the vehicle positioning is argued.In the design of the GPS receiver device, this dissertation introduces the hardware design and the software design with a chapter respectively.By using the GARMIN GPS OEM Board and the Motorola GSM Module, controlled by the microcomputer MCS-51, the GPS main controlled circuit board is madeo In the software design, the main program, the program of the communication between the GPS main controlled circuit board and the GPS OEM Board, the program of the erase and the read for the record memory, the program of the short message service, the program of the data transformation from the record memory to the computer is proposed.Although the Global Positioning System is the most accurate wireless positioning system at present, many users are not satisfied with the origin accuracy and hope to have better quality. The data processing based the output data is a widely used technology.In the last section of the dissertation, the types and the reasons of the error is presented, and the medium filter used to improve the accuracy is argued.The stimulation shows that the method is feasible.Finally, the assembly program according to the medium filter is programmed, and the program is transformed into the microcomputer, thus the accuracy of the output data from the GPS receiver device is improved.更多还原