车路协同环境下多模式通信平台设计与典型场景应用

发布时间：2018-08-26 10:09

【摘要】：摘要：随着我国经济的飞速发展,交通拥挤问题日益严重,已成为制约城市经济发展的瓶颈。车路协同系统CVIS作为未来交通发展的核心和方向,是解决城市交通拥堵问题的关键,而高质量的无线通信技术则是整个车路协同系统的研究重点。本文的工作是搭建车路协同环境下的多模式无线通信平台,对车路协同环境下基于DSRC、WIFI和3G三种无线通信模式的信息交互相关问题进行研究。论文首先分析了DSRC、WIFI和3G三种无线通信模式在车路协同系统中的适用性,搭建并完成了包括DSRC模块、WIFI模块、3G模块、车载诊断系统OBD以及GPS定位单元在内的基于PCM-9562工业控制计算机为基础的多模式无线通信硬件平台。通过安装硬件设备的驱动程序,设计完成了DSRC模块、WIFI模块和3G模块的相互无线组网,使硬件通信平台具备多种模式下的通信功能。通过分析车载诊断系统OBD的硬件组成以及内部数据协议,编写上位机应用程序,完成了车载OBD系统车辆状态信息的采集。其次,设计并分析了基于无线通信平台的三种车路协同实际应用场景,包括单车道情况下的车辆跟驰场景、同方向双车道情况下的车辆换道场景以及交叉口车辆防撞预警场景。通过对三种应用场景进行建模分析,完成了车辆跟驰场景算法设计、车辆换道场景算法设计以及交叉口车辆防撞预警算法设计,同时通过对地图匹配算法的相关研究,成功绘制试验场景数字电子地图,以GPS定位信息以及车载OBD数据作为无线传输数据,实现以多模式无线通信平台为硬件基础的上层应用软件设计及算法实现。最后,本文分别对DSRC模块和WIFI模块的通信性能进行了实地测试,并且对三种车路协同环境下的场景分别进行实地测试验证。通过实时GPS数据和车载OBD数据的传输,实现了上位机应用层和多模无线通信平台之间的数据交互,并同时结合地理信息系统控件MapX,完成在车载平台上位机上实时显示本车和其他车辆的位置、速度信息并实时提供给车辆驾驶员不同实际场景下的辅助驾驶策略。测试表明,基于车路协同的多模式通信平台可以有效的实现数据的实时传递,能够在不同实地试验场景下辅助驾驶员获取本车和其他车辆的相关信息,并且通过试验场景模型算法的分析计算,最终为驾驶员提供有效的辅助驾驶参考。
[Abstract]:Absrtact: with the rapid development of economy in China, traffic congestion is becoming more and more serious, which has become the bottleneck restricting the development of urban economy. As the core and direction of future traffic development, vehicle-road cooperative system (CVIS) is the key to solve the problem of urban traffic congestion, and high quality wireless communication technology is the research focus of the whole vehicle-road cooperative system. The work of this paper is to build a multi-mode wireless communication platform in the vehicle-road cooperative environment, and to study the information interaction related problems based on DSRC,WIFI and 3G wireless communication modes in the vehicle-road collaborative environment. Firstly, this paper analyzes the applicability of DSRC,WIFI and 3G wireless communication modes in the vehicle-road cooperative system, and builds and completes the 3G module, including the DSRC module, WiFi module and 3G module. The multi-mode wireless communication hardware platform based on PCM-9562 industrial control computer including OBD and GPS positioning unit. By installing the driver of the hardware equipment, the wireless network between the DSRC module and the 3G module is designed and completed, so that the hardware communication platform has the communication function under various modes. By analyzing the hardware composition and internal data protocol of the on-board diagnostic system (OBD), the application program of upper computer is written to complete the collection of vehicle status information in the vehicle-mounted OBD system. Secondly, we design and analyze three kinds of practical application scenarios of vehicle-road coordination based on wireless communication platform, including single lane vehicle following scene, same direction two-lane vehicle changing scene and intersection vehicle collision warning scene. Through modeling and analysis of three application scenarios, the algorithm design of vehicle car-following scene, the algorithm of vehicle changing scene and the design of vehicle anti-collision early warning algorithm at intersection are completed. At the same time, the related research on map matching algorithm is carried out. The digital electronic map of the test scene is successfully drawn. The upper layer application software design and algorithm realization based on multi-mode wireless communication platform are realized by using GPS location information and OBD data on vehicle as wireless transmission data. Finally, the communication performance of the DSRC module and the WIFI module are tested in the field, and the scene of the three kinds of vehicle-road collaborative environment is tested in the field. Through the transmission of real-time GPS data and on-board OBD data, the data exchange between the upper computer application layer and the multi-mode wireless communication platform is realized. At the same time, the GIS control MapX, is used to display the position and speed of the vehicle and other vehicles on the upper computer of the vehicle platform in real time, and to provide the assistant driving strategy for the vehicle driver in different situations. The test results show that the multi-mode communication platform based on vehicle-road cooperation can effectively realize the real-time data transmission, and can assist the driver to obtain the relevant information of the vehicle and other vehicles under different field test scenarios. And through the analysis and calculation of the experimental scene model algorithm, finally provide the driver with effective driving reference.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U495

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