摘要
在传统的交通事故现场勘查中，勘查人员需要通过皮尺测量每个事故要素与基准点之间的距离，再在事故现场图上用点、直线、弧线或封闭曲线等绘图元素将其逐一标记出来。为提高事故勘查效率及准确性。本文提出利用RFID和WSN相结合的无线定位系统。RFID可以清楚地标识事故要素的名称、属性和归属，WSN；40利用传感器获得的定位信息，结合RFID数据，通过ZIGBEE无线通信网络传送给计算机。计算机使用专用软件对接收到的数据进行分析，利用几何算法对测量点进行定位，根据RFID数据了解测量点的性质（如孤立点、直线端点、弧线端点或中间点、封闭曲线经过点）、类别（如车辆前轮或后轮、刹车痕迹、人体位置、散落物位置等），从而自动绘制出可视化的定位图。
In traffic accident scene investigation, the traditional measuring and positioning methods cannot meet current requirement for efficiency and effectiveness, because the investigators have to use tape to measure the distance between accident factors and reference points, and then mark the drawing factors by corresponding elements-dots, straight lines, curves, closed curves and so on. A new wireless positioning system integrated with RFID and WSN has been established to solve the problem. RFID can clearly mark the ID, attribute and affiliation of accident factors; WSN can acquire location factors from the sensors and transmit the combined data （RFID and WSN data） to computers by ZIGBEE wireless networks. The computer then use a special software to automatically process the received data, use geometric algorithm to position the survey marks and define the nature of survey marks （such as isolated points, line end points, curve end points, intermediate points etc. ） and the types of the survey marks （such as front wheels or rear wheels, skid marks, body locations, position of fallout etc.） in accordance with RFID data, thus a visualized location map can be automatically generated.
出处
《道路交通科学技术》
2017年第4期37-40,共4页
Road Traffic Science & Technology
