Wireless magnetic sensors for traffic surveillance
Wireless magnetic sensors for traffic surveillance
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DOI：
10.1016/j.trc.2007.10.004
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发表时间：
2008-06-01
影响因子：
8.3
通讯作者：
Varalya, Pravin
中科院分区：
文献类型：
--
作者：
Haoui, Amine;Kavaler, Robert;Varalya, Pravin
Sensys Networks的VDS 240车辆检测系统是一个无线传感器网络，由放置在车道中心的3“x 3”x 2 "传感器节点和放置在路边15“高的6”x 4“x 4"接入点（AP）盒组成。节点测量由车辆引起的地球磁场的变化，处理测量结果以检测车辆，并通过无线电将处理后的数据传输到AP。AP将来自节点的数据组合成用于本地控制器或交通管理中心（TMC）的信息。AP通过无线电直接与150 '范围内的多达96个节点进行通信;中继器将范围扩展到1000'。该系列适用于部署VDS 240网络，用于交通计数、停车栏和提前检测、测量坡道和交叉口的队列长度以及停车引导和执法。VDS 240具有自校准、IP寻址和远程监控功能。数据不会丢失，因为未确认的数据包会重新传输。VDS 240在车辆计数、速度和占用率方面的准确性与调谐良好的环路相当。由于节点报告单个车辆事件，AP还计算单个车辆的长度、速度和车辆间的头距，这些测量可用于新的交通应用。2007年7月，VDS 240系统被部署在多个城市和州的主干道和高速公路上，并在美国、澳大利亚、欧洲和南非进行了30次客户试验。(c)2007爱思唯尔有限公司版权所有。
Sensys Networks' VDS240 vehicle detection system is a wireless sensor network composed of a collection of 3 '' by 3 '' by 2 '' sensor nodes put in the center of a lane and a 6 '' by 4 '' by 4 '' access point (AP) box placed 15' high on the side of the road. A node measures changes in the earth's magnetic field induced by a vehicle, processes the measurements to detect the vehicle, and transfers the processed data via radio to the AP. The AP combines data from the nodes into information for the local controller or the Traffic Management Center (TMC). An AP communicates via radio directly with up to 96 nodes within a range of 150'; a Repeater extends the range to 1000'. This range makes it suitable to deploy VDS240 networks for traffic counts, stop-bar and advance detection, and measurement of queue lengths on ramps and at intersections, as well as parking guidance and enforcement. VDS240 is self-calibrating, IP-addressable and remotely monitored. Data are not lost because unacknowledged data packets are retransmitted. The accuracy of VDS240 for vehicle counts, speed and occupancy is comparable to that of well-tuned loops. Because the nodes report individual vehicle events, the AP also calculates individual vehicle lengths, speeds and inter-vehicle head ways-measurements that can be used for new traffic applications. In July 2007, VDS240 systems were deployed in arterials and freeways in several cities and states, and 30 customer trials were underway in the US, Australia, Europe and South Africa. (c) 2007 Elsevier Ltd. All rights reserved.