各向异性磁阻传感器在车辆探测中的应用  

Application of AMR sensors to vehicle detection

作　　者：李希胜[1] 于广华[2] 

机构地区：[1]北京科技大学信息工程学院,北京100083 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《北京科技大学学报》2006年第6期587-590,共4页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(No.60574090)

摘　　要：研制了一种基于各向异性磁阻(AMR)传感器的车辆探测器.该车辆探测器由三维AMR传感器及相应的信号处理电路组成.当车辆驶过探测器上方时,车辆的存在将会引起周围磁场的变化,三维AMR传感器输出将发生相应的变化,根据AMR传感器的输出可判断周围空间内车辆的存在与否.对该探测器的特性进行了实验研究.实验结果表明:当车辆分别沿南北向、东西向通过AMR传感器上方时,传感器输出变化规律不同;该探测器可实现车辆探测.A vehicle detector with an anisotropic magnetoresistive （AMR） sensor was developed. The vehicle detector consisted of a three-axis AMR sensor and related signal processing circuit. When a vehicle was moving over the detector, the surrounding magnetic field changed due to vehicle disturbance, and the output of the three-axis AMR sensor changed accordingly. Whether a vehicle was present or not could be judged based on the AMR sensor＇ s output. The detector＇ s characteristic was tested. When the vehicle be- ing detected was moving over the detector along different directions （south-north, east-west）, the output changes were different. The results show that this detector can realize the function of vehicle detection.

关 键 词：各向异性磁阻传感器 车辆探测器 磁阻 地磁场 

分 类 号：TP211.13[自动化与计算机技术—检测技术与自动化装置]