微型的感应线圈车辆传感器

智能交通系统(ITS)是解决日益严重的高速公路和城市交通问题的有效途径.车辆检测传感器是ITS中最重要的交通数据采集设备之一.通过埋在地下或者安装于道路两旁的车辆检测器,可以准确实时地获得各种交通数据(包括车流量、车速度、车辆密度、占有率等).在众多车辆检测器中,感应线圈式车辆检测器具有性能稳定、性价比高、应用方便等优点,因而目前在工程上应用最广.但其探测线圈体积庞大,安装时需要阻断交通,工程量大;线圈容易损坏.本文将采用微型线圈,并将单片机控制技术引入传统的车辆传感器中,从而有效地降低了安装的工程量,开发出适用性更强的车辆传感器.经实验证明,该传感器可有效地检测出车辆信号.

Mini Inductive loop Vehicle Detection Sensor

Intelligent Transportation System (ITS) is a valid approach to solve the increasing transportation issue in cities and in highways. Vehicle detection is one of the key technologies in ITS. The ITS collects and processes traffic data (vehicle flow, vehicular speed, vehicle density and occupancy ratios) from vehicle detection sensors buried under the road or installed along the road. Inductive loop detector as one type of the vehicle detector is applied extensively, with the characters of stability, high value to cost ratio and feasibility. On the other hand, most of the existing inductive loop vehicle detection sensors have some weak points such as friability of large detective loop, huge engineering for setting and traffic interruption during installing the sensor. The design and reality of a new inductive loop vehicle detection sensor is presented against these weak points existing now. The new sensor is more feasible with miniature inductive loop, easy maintenance and installation, and intelligent controller. The new sensor can detect vehicle signals effectively proved by the experiment.