基于DSRC车载通信的车辆防撞预警研究

发布时间：2018-11-24 09:24

【摘要】：近年来随着车辆的增多,交通事故愈发增多,如何解决交通安全问题成为具有现实意义的课题。伴随智能交通技术的不断成熟,车辆间通过信息交互实现车辆防撞预警,可以保证安全驾驶及减少交通事故。因此,本文设计了一个基于DSRC的车载通信预警系统,通过获取车辆间的状态信息进行车辆防撞算法处理,将存在的危险信息传递给驾驶员。本文首先是DSRC车载通信预警系统的设计,系统包含车载设备和应用层模块。车载设备通过组合定位模块获取自车的高精度定位信息,通过DSRC模块与邻车定位信息进行交互,以及通过车内局域网实现与应用层模块相连。接着应用层模块通过Android系统设计实现车辆防撞预警功能,包括数据采集及处理、预警信息显示。然后着重研究了车辆防撞预警算法,在原有的安全时间算法TTC的基础上,提出基于不同车速对应不同的安全预警时间阈值,实现合适预警时机。最后进行系统搭建和实车实验,包括DSRC性能、定位性能及车辆防撞预警算法性能的测试。实验结果表明,本文设计的DSRC车载通信预警系统是可行的和合理的,可以很好实现车辆防撞预警功能。本文将DSRC用于车载通信可以实时交互车辆间的信息,通过改进的车辆防撞预警算法进行处理,具有很好的实用性和创新性,对于辅助交通安全驾驶具有重大意义。本文完成的主要内容包括:1.DSRC车载通信预警系统的设计;2.基于Android的预警系统应用模块的设计;3.改进的车辆防撞预警算法的设计;4.通过实车实验,对DSRC性能、定位性能以及车辆防撞预警算法进行测试,并对测试结果进行分析及结论。
[Abstract]:In recent years, with the increasing number of vehicles and traffic accidents, how to solve the problem of traffic safety has become a topic of practical significance. With the development of intelligent transportation technology, vehicle collision prevention and warning can be realized through information exchange between vehicles, which can ensure safe driving and reduce traffic accidents. Therefore, a vehicle communication early warning system based on DSRC is designed in this paper. The vehicle collision prevention algorithm is processed by obtaining the state information between vehicles, and the dangerous information is transmitted to the driver. The first part of this paper is the design of DSRC vehicle communication warning system, which includes vehicle equipment and application layer module. The vehicle equipment acquires the high-precision positioning information of the vehicle through the combined positioning module, interacts with the location information of the adjacent vehicle through the DSRC module, and connects with the application layer module through the LAN inside the vehicle. Then the application module realizes the anti-collision warning function of vehicle through Android system, including data acquisition and processing, early warning information display. Then the vehicle collision warning algorithm is studied. Based on the original safety time algorithm (TTC), a new method is proposed, which is based on different vehicle speed corresponding to different safety warning time threshold to realize the appropriate early warning time. Finally, the system is built and the real vehicle experiments are carried out, including the performance of DSRC, positioning performance and vehicle anti-collision warning algorithm performance test. The experimental results show that the DSRC vehicle communication early warning system designed in this paper is feasible and reasonable, and it can realize the anti-collision warning function of the vehicle very well. In this paper, the application of DSRC in vehicle communication can exchange the information between vehicles in real time. The improved anti-collision warning algorithm is very practical and innovative. It is of great significance to assist traffic safety driving. The main contents of this paper include: the design of 1.DSRC vehicle communication warning system; 2. Design of application module of early warning system based on Android; 3. The design of the improved vehicle collision warning algorithm; 4. The performance of DSRC, positioning performance and vehicle anti-collision warning algorithm are tested through real vehicle experiments, and the test results are analyzed and concluded.
【学位授予单位】：江苏科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U463.6;TP277

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