【作者】 张浩；

【导师】 卢珏；

【作者基本信息】 武汉理工大学 ， 电子科学与技术， 2018， 硕士

【摘要】 由于车辆数量的增加而导致的交通安全以及交通拥堵问题越来越严重。车路协同概念的提出为解决这两类问题提供了最有效的途径,而V2X(Vehicle-toEverything)车载系统在车路协同技术中起到了关键性的作用。V2X车载系统的主要工作是实时的采集自身车辆的状态信息并通过无线通信模块将自身车辆状态信息发送给周围交通环境中的其他车辆、路边单元等,同时也接收来自其他车辆、路边单元等传来的数据信息。该系统结合全球定位系统(Global Positioning System,GPS)技术以及控制器局域网络(Controller Area Network,CAN)技术实时获取车辆位置以及状态信息,通过专用短程通信(Dedicated Short Range Communication,DSRC)技术使车车和车路间形成高速双向交互式通信并通过数据处理为道路安全、缓解交通拥塞等提供可靠的保障。本文主要工作如下:1)研究设计了V2X车载系统的总体方案。根据V2X车载系统的应用背景和实际需求对其进行了需求分析,主要完成车辆信息的采集、交互和处理等功能。通过几种可用于V2X环境下协议的性能对比分析后,选取DSRC协议作为无线通信模块的通信协议,并提出了V2X车载系统的软硬件的设计方案。2)设计实现了V2X车载系统的硬件平台。根据V2X车载系统的需求分析可将硬件平台分为主控制模块、DSRC无线通信模块、GPS模块、CAN总线模块、网络模块、RS232串口电路、USB模块和电源模块。根据需求选取I.MX6DL为主控制模块的微处理器以及对各个信息采集模块的芯片进行选型,根据DSRC协议选取无线通信模块的协议处理器和收发器来设计电路。3)研究实现了V2X车载系统的软件平台。选取了移植性和稳定性较好的嵌入式Linux作为操作系统,搭建交叉编译环境并通过移植引导程序uboot、裁剪移植内核以及制作根文件系统为I.MX6DL微处理器构建软件平台。然后对V2X车载系统的信息采集模块及无线通信模块的驱动进行设计且移植进Linux系统。4)V2X车载系统性能测试。主要测试了GPS定位数据采集模块的接收功能、CAN总线模块的通信功能、DSRC无线通信模块的数据收发功能以及整体性能。结果表明设计的V2X车载系统能够达到需求。更多还原

【Abstract】 Due to the increase in the number of vehicles,traffic safety and traffic congestion are becoming more and more serious.The concept of vehicle infrastructure coordination provides the most effective way to solve these two problems,the V2X on-board system plays a key role in vehicle infrastructure cooperative technology.The main job of the V2X on-board system is to collect the status information of its own vehicle in real time and send the status information of its own vehicle to other vehicles and roadside units in the surrounding traffic environment through the wireless communication module,as well as receiveing data from other vehicles and roadside units.The system uses GPS technology and CAN technology real-time access to vehicle location and status information.Through the DSRC technology enables high-speed two-way interactive communication between vehicles and roads and provide reliable guarantee for road safety,traffic congestion mitigation through data processing.The main work of this article is as follows:1)Study and design the overall design of V2X vehicle system.According to the application background and the actual needs of the V2X vehicle system and then analysis the requirements of the system.It mainly completes functions such as collection,interaction and processing of vehicle information.After the performance comparison and analysis of several protocols which can be used in the V2X,The DSRC protocol is selected as the communication protocol of the wireless communication module,and the design of the hardware and software of the V2X vehicle system is proposed.2)Design and implement the hardware platform of V2X vehicle system.According to the demand analysis of V2X vehicle system,the hardware platform can be divided into main control module,DSRC wireless communication module,GPS module,CAN bus module,network module,RS232 serial port circuit,USB module and power supply module.According to the needs to select the I.MX6 DL to be the main control module microprocessor and select the chip for each information acquisition module,according to the DSRC protocol to select the protocol processor and transceiver of the wireless communication module to design the circuit.3)Study and implement the software platform of V2X vehicle system.Select the embedded Linux with good portability and stability to be the operating system,build a cross compiler environment and build a software platform for I.MX6 DL microprocessors by transplanting the boot program uboot,cropping and porting the kernel and making the root file system.Then design and transplant the driver of the information acquisition module and the wireless communication module of the V2X vehicle system into the Linux system.4)Performance test of V2X vehicle system.It mainly tests the acceptance function of the GPS positioning data acquisition module,the communication function of the CAN bus module,the data transmission and reception functions of the DSRC wireless communication module,and the overall performance.The results show that the designed V2X vehicle system can meet the demand.更多还原