Abstract: In order to obtain accurate real-time traffic information parameters, the use of wireless sensor network technology and GPRS technology as an intelligent traffic-aware front-end and means of communication builds traffic information collection network and provides a more convenient solution for traffic information collection. Sensor nodes are designed for the traffic information detection and vehicle monitoring algorithm and the speed measurement algorithm are proposed. Experimental results show that the vehicle monitoring algorithm and the speed measurement algorithm can be implemented on the sensor nodes with limited capacity and get high accurate real-time traffic parameters, such as traffic flow, speed and so on. Traffic information collection network can meet the needs of large-scale network deployment and also can be used in intelligent traffic system.

Key words: wireless sensor networks, intelligent transportation, traffic detection, magnetic sensor

摘要： 为了准确实时获取交通信息参量，利用无线传感器网络技术作为智能交通感知前端和通信手段，融合GPRS技术，构建交通信息采集网，为道路交通信息采集提供了更加便捷的解决方案。设计了交通信息采集的传感器节点，提出了动态车辆探测算法和车速测量算法。实测结果表明：动态车辆探测算法和车速测量算法能够在计算能力有限的传感器节点上实现，能准确实时地获得车流量、车速等交通参量；该交通信息采集系统能满足网络大规模部署的需求，可应用于智能交通系统。

关键词: 无线传感器网络, 智能交通, 车辆探测, 磁阻传感器