线圈式车速及车流量检测器设计  

Design of the Speed and Vehicle Flux Detector Based on Loop-coil

作　　者：侯荣涛[1,2] 周彬[2] 唐盼[1] 

机构地区：[1]南京信息工程大学计算机与软件学院,南京210044 [2]南京信息工程大学计算机和电子与信息工程学院,南京210044

出　　处：《科学技术与工程》2015年第27期188-192,共5页Science Technology and Engineering

基　　金：国家自然科学基金面上项目(61373064);南京信息工程大学重点教改项目(13JY001)资助

摘　　要：为提高对车辆检测的准确度,设计了一种新型的基于线圈的车速及车流量检测系统。设计应用Cortex-M3内核的高性能ARM平台,选通工作模式实现分时段采集多路通道信号,系统可连接至数据中心,实现远程监控。在软件方面,利用队列数据结构,按照先进先出的原则对上游线圈与下游线圈的信号进行配对。此外,系统采用了求导法,可降低对于大型车、拖挂车的误检,弥补线圈检测技术上的缺陷。测试表明,车辆检测器具有良好的可靠性,检测精度高,具有很高的实用价值。In order to improve the accuracy of vehicle detector, a new embedded system based on loop was designed. This system works on high-performance hardware ARM based on Cortex-M3, collects signal from muhi-road by time interval under the selecting mode. The system can connect to data center and realize remote monitoring. With data structure of queue, matching the former loop to the latter loop on the basis of first input first output （FIFO）. In addition, the system uses the method of derivation to reduce the mistake about large vehicles and trailers, which make up for the shortcoming of detectors based on loop-coil. The application results show that the detector is reliable, of great accuracy and has a fine practical value.

关 键 词：智能交通 车辆检测 环形线圈 信号配对 求导法 

分 类 号：U491.113[交通运输工程—交通运输规划与管理]