基于RTEMS的车辆安全预警系统设计与实现
发布时间：2018-11-27 17:53
【摘要】：汽车是一把双刃剑,它的快速发展在给人类交通出行带来极大便利的同时,也会带来惨痛的交通事故,这是长期困扰交通参与者的巨大难题。近几年来,随着嵌入式控制技术、传感器技术和信息融合技术的飞速发展,以预防交通事故为主要目的的汽车主动安全技术得到了高速发展。从早期的汽车动力学稳定性控制技术和汽车底盘一体化控制技术,发展到现在的基于人—车危险状态监控的车辆安全预警技术。随着这些安全技术的发展,一定程度上提高了汽车的舒适性和安全性,安全预警技术已经成为汽车技术发展的一个重要研究领域。本课题基于 RTEMS(Real Time Executive for Multiprocessor Systems,简称RTEMS,实时多处理器系统)设计了一种车辆安全预警系统。该系统不仅可以实现汽车行驶状态的安全预警,还可以实现驾驶员驾驶行为数据的收集、存储与上传,为交通安全大数据的研究分析提供基础数据。本文从系统的功能需求出发,首先确定了系统的总体实现方案,对系统各模块进行功能划分,并设计了各功能模块之间的数据交互方案,确保数据的准确有效传输。其次设计了安全预警系统的硬件平台,以S3C2416作为系统的核心处理器;以CAN(Controller Area Network,简称CAN,控制器局域网)控制器芯片MCP2515作为核心的数据采集单元,对系统的预警信息等重要行车参数进行采集;以MT3732作为系统的数据传输单元,实现车辆与网络收集平台间双向交互式通信;针对复杂的车载电磁环境,设计了改进型DC-DC变换电路实现对系统的供电。最后根据设计的硬件电路完成系统软件设计,利用RTEMS操作系统的实时性特点设计了多进程的上层应用程序,解决了各任务之间的通信和同步问题,完美地实现了车辆安全预警和通过3G无线网络上传预警信息的目的。测试结果表明,本文设计的系统克服了汽车复杂的物理和电磁环境,实现了车辆行驶状态的安全预警以及车辆与网络收集平台间高速、可靠、实时的双向交互通信功能,具有较高的实用和推广价值。
[Abstract]:Automobile is a double-edged sword, its rapid development not only brings great convenience to human transportation, but also brings tragic traffic accidents, which is a huge problem that has plagued traffic participants for a long time. In recent years, with the rapid development of embedded control technology, sensor technology and information fusion technology, the automatic active safety technology, which aims at preventing traffic accidents, has been developed at a high speed. From the early vehicle dynamics stability control technology and the automobile chassis integrated control technology to the present vehicle safety early warning technology based on the man-vehicle dangerous condition monitoring. With the development of these safety technologies, the comfort and safety of automobiles have been improved to some extent, and safety warning technology has become an important research field in the development of automotive technology. A vehicle safety warning system is designed based on RTEMS (Real Time Executive for Multiprocessor Systems, (RTEMS, real-time multiprocessor system). The system can not only realize the safety warning of vehicle driving state, but also can collect, store and upload driver driving behavior data. It can provide basic data for traffic safety big data research and analysis. Starting from the functional requirements of the system, this paper first determines the overall implementation scheme of the system, divides the modules of the system into functions, and designs a scheme of data exchange among the functional modules to ensure the accurate and effective transmission of data. Secondly, the hardware platform of the security early warning system is designed, with S3C2416 as the core processor of the system. CAN (Controller Area Network, (CAN, controller LAN) controller chip MCP2515 is used as the core data acquisition unit to collect the important driving parameters such as the warning information of the system. Taking MT3732 as the data transmission unit of the system, the two-way interactive communication between the vehicle and the network collection platform is realized, and the improved DC-DC transform circuit is designed to supply the power to the system in view of the complex vehicle electromagnetic environment. Finally, the system software is designed according to the designed hardware circuit, and the multi-process upper application program is designed by using the real-time characteristics of the RTEMS operating system, which solves the communication and synchronization problems among the tasks. The purpose of vehicle safety warning and uploading warning information through 3G wireless network is realized perfectly. The test results show that the system overcomes the complex physical and electromagnetic environment of the vehicle, and realizes the security warning of the vehicle driving state and the high-speed, reliable and real-time two-way interactive communication between the vehicle and the network collection platform. It has high practical and popularizing value.
【学位授予单位】：北方工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U463.6;TP277
本文编号：2361599
[Abstract]:Automobile is a double-edged sword, its rapid development not only brings great convenience to human transportation, but also brings tragic traffic accidents, which is a huge problem that has plagued traffic participants for a long time. In recent years, with the rapid development of embedded control technology, sensor technology and information fusion technology, the automatic active safety technology, which aims at preventing traffic accidents, has been developed at a high speed. From the early vehicle dynamics stability control technology and the automobile chassis integrated control technology to the present vehicle safety early warning technology based on the man-vehicle dangerous condition monitoring. With the development of these safety technologies, the comfort and safety of automobiles have been improved to some extent, and safety warning technology has become an important research field in the development of automotive technology. A vehicle safety warning system is designed based on RTEMS (Real Time Executive for Multiprocessor Systems, (RTEMS, real-time multiprocessor system). The system can not only realize the safety warning of vehicle driving state, but also can collect, store and upload driver driving behavior data. It can provide basic data for traffic safety big data research and analysis. Starting from the functional requirements of the system, this paper first determines the overall implementation scheme of the system, divides the modules of the system into functions, and designs a scheme of data exchange among the functional modules to ensure the accurate and effective transmission of data. Secondly, the hardware platform of the security early warning system is designed, with S3C2416 as the core processor of the system. CAN (Controller Area Network, (CAN, controller LAN) controller chip MCP2515 is used as the core data acquisition unit to collect the important driving parameters such as the warning information of the system. Taking MT3732 as the data transmission unit of the system, the two-way interactive communication between the vehicle and the network collection platform is realized, and the improved DC-DC transform circuit is designed to supply the power to the system in view of the complex vehicle electromagnetic environment. Finally, the system software is designed according to the designed hardware circuit, and the multi-process upper application program is designed by using the real-time characteristics of the RTEMS operating system, which solves the communication and synchronization problems among the tasks. The purpose of vehicle safety warning and uploading warning information through 3G wireless network is realized perfectly. The test results show that the system overcomes the complex physical and electromagnetic environment of the vehicle, and realizes the security warning of the vehicle driving state and the high-speed, reliable and real-time two-way interactive communication between the vehicle and the network collection platform. It has high practical and popularizing value.
【学位授予单位】：北方工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U463.6;TP277
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