通过GPS接收单元模块接收卫星发送的信号从而确认车辆的动态位置（经度、纬度）、时间、状态等信息参数。将接收到的信息参数与公交线路信息库中存储的车站位置信息进行比较，计算车辆与站点之间距离的大小，当满足预先设定的距离大小时，则向主控制器件返回相应的站点信息。基于FAT32文件系统的MP3数据读取部分

-Through the GPS receiver unit to send the module to receive satellite signals in order to confirm the vehicle' s dynamic position (longitude, latitude), time, status and other information parameters. Will receive information on parameters and the bus line information database stored in the station location information to compare, calculate the distance between vehicles and the size of the site, when the distance to meet the pre-set size, then return to the main control device corresponding site information . Based on the FAT32 file system to read part of the MP3 data