基于磁阻传感器的车辆检测算法综述

Review of vehicle detection algorithms based on magnetoresistive sensors

磁阻传感器将车辆引起的地磁扰动转换为清晰的电压信号,采用阈值算法可得到交通流量、车长、车速等多种信息。地磁检测器是环形线圈的理想代替技术,国内外许多学者对基于地磁车辆检测器的检测算法展开了研究。结合国内外的研究状况根据研究对象对算法进行分类,并总结算法存在的问题,最后提出相应的解决办法。

Anisotropic MagnetoResistive（AMR） sensor senses disturbance of earth＇s magnetic field caused by a vehicle over sensor and produces an output clear DC signal.Through the slicing algorithm,all kinds of vehicle information can be gotten,such as traffic volumes,vehicle speed,length of vehicle and the type of vehicle.Now,Geomagnetic Vehicle Detector（GVD） is to be an attractive alternative to inductive loops.According to the research results in native and abroad,this paper classifies vehicle algorithm based on AMR sensors by what object it study.Lastly,this paper concludes questions existing in above algorithms and proposes a vehicle detecting technology on the magnetic declination.