一种无线车辆检测传感器的设计

Design of kind of wireless vehicle detection sensor

介绍了一种实用化的无线车辆检测传感器,用于智能交通领域基础数据的采集,实现城市道路的车辆流量、平均车流速度2大统计功能,利用该传感器结合城市智能交通管控平台可有效缓解城市交通拥堵问题。该传感器基于各向异性磁阻(AMR)传感器和ZigBee无线通信协议实现,使用了大容量工业级电池供电,采用超低功耗设计、状态机检测算法、精确授时等关键技术。经过现场一年多的试验与验证,该传感器完全能满足现场复杂的使用环境要求,车辆流量检测精度可达95%以上,速度检测精度可达90%以上。

This paper introduces a kind of applied wireless vehicle detection sensor which used in the data collection of intelligent transportations domain,and it achieves two statistical functions about traffic volumes and average vehicle speed.It can improve traffic congestion of city effectively by combing this kind of sensor with city intelligent transportations management and control platform.The sensor is based on AMR sensor and ZigBee wireless communication protocol,and uses large capacity industrial batteries.Many key technologies are applied in this sensor,such as low power consuming technology,state machine detection algorithm and precise timing technology.The sensor can meet the requirement of the complex environment through testing and validation for more than one year.The accuracy of traffic volumes detection is more than 95％ and the accuracy of speed detection is more than 90％.