基于多地磁传感器的车辆位置检测系统设计

Design of vehicle position detection system based on multiple geomagnetic sensors

系统通过在路面下安装多个地磁传感器检测车辆在路面的实时位置。地磁传感器与微处理器集成为信号处理模块,信号处理模块采集地磁传感器数据并在滤波后发送给数据处理模块。数据处理模块通过车辆经过路面时地磁传感器数据的变化来分析计算得出车辆的位置。通过对实验测得数据进行曲线拟合得出车辆位置与传感器差值之间的关系,进而推导出车辆的位置,其两轴精度达到10 cm。此外,设计的系统还可以测得车辆的速度和前进方向,并有望在智能公路方面应用于自动驾驶。

The system detects the position of the vehicle on the road in realtime by installing multiple geomagnetic sensors under the road surface.The geomagnetic sensor and the microprocessor are integrated into signal processing module.The signal processing module collects the geomagnetic sensor data and transmits the data to data processing module after filtering.The data processing module analyzes and calculates to obtain position of the vehicle by change of the geomagnetic sensor data when the vehicle is passing the road surface.Through curve fitting of the measured data,get the relationship between the vehicle position and sensor difference,and then the position of the vehicle is derived,the precision of the two axle can achieve 10 cm.In addition,the system can measure the speed and heading of the vehicle and is expected to be used for autonomous driving on smart highway.