基于车道线双地磁传感器的交通流量检测  

Traffic Volume Detection Based on Two Magnetic Sensors along Lane Markings

作　　者：孙延利 全威 王华[1] 李浩 SUN Yanli;QUAN Wei;WANG Hua;LI Hao(School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin Heilongjiang 150090,China;Broadvision Engineering Consultants Co.,Ltd.,Kunming Yunnan 650041,China)

机构地区：[1]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150090 [2]云南省交通规划设计研究院有限公司,云南昆明650041

出　　处：《传感技术学报》2024年第12期2194-2200,共7页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金项目(42171451)。

摘　　要：交通设施的智慧化升级是实现智慧交通(ITS)的重要方向,介绍了一种配备地磁传感器的新型智慧道钉(SRS),具备交通流量检测、车道线增强等功能。针对基于车道线安装的地磁传感器的交通检测需求,提出基于自适应方差+磁场强度的车辆信号提取方法,该自适应方差指标能够自适应感知检测数据序列中的背景段与信号段,且在背景段稳定在0到2之间,不受检测地点与设备差异的影响;针对单SRS节点面临的复杂检测场景,如存在双车并行、长车辆等,分析了车辆信号规律,提出了识别单车信号、双车信号与长车辆信号的方法。为进一步提高检测精度,提出了基于边缘服务器的双SRS校正方法,结果表明,单SRS检测的车道流量误差为4.8%,而双SRS检测的车道流量误差为0.7%。Intelligent upgrade of transportation facilities is an important direction to realize Intelligent Transportation System(ITS).A new device called Smart Road Stud(SRS)is introduced,which is equipped with a magnetic sensor and has the functions of traffic detection and lane markings enhancement.In order to meet the traffic detection requirements of magnetic sensors installed on lane markings,a vehicle signal extraction method based on adaptive variance and magnetic field intensity is proposed.The adaptive variance can adaptively sense the background and signal segment in the data series.At the background segment,the index is stable between 0 and 2,unaffected by the detection sites and devices.In view of the complex detection scenarios,such as two-vehicle parallel,long vehicle,etc.,the vehicle signal law is analyzed,and the method of identifying single-vehicle signal,two-vehicle signal,and long vehicle signal based on single SRS is pro-posed.In order to further improve the accuracy,a correction method of double SRSs based on edge server is proposed.The results show that the error of traffic volume of the lane detected by a single SRS is 4.8%,while that of double SRSs is 0.7%.

关 键 词：交通信息工程及控制 交通流量检测 地磁传感器 车辆识别 

分 类 号：U491.1[交通运输工程—交通运输规划与管理]