【作者】 韩洋；

【导师】 侯文；

【作者基本信息】 中北大学 ， 测试计量技术及仪器， 2008， 硕士

【摘要】 近年来,道路交通安全形势越来越严峻,交通事故给家庭、集体和国家都带来了巨大的损失,已成为世界性的严重问题。统计资料表明,在众多的高速公路交通事故中,追尾碰撞引起的事故占最多数,因此,研发一种高性能的汽车追尾防撞预警系统成为迫切的需要。论文参考了国内外诸多汽车防撞模型及研究成果,从动力学和运动学两方面详细分析了汽车的制动过程,根据汽车的运动状态建立了比较实用、简单的汽车防撞预警模型。通过对追尾碰撞事故原因的分析,提出了系统设计要求并确定了系统的设计方案。整个系统由各种传感器、数据采集电路、声光报警电路、液晶显示电路等组成,系统采用高性能的ARM7芯片S3C44B0X作为中央处理器,保证了系统工作的实时性。论文对系统所需传感器进行了分析、比较和选型;制作、调试了系统硬件部分;采用汇编与C语言结合的方式编写了系统软件,并将此软件在硬件上进行了调试;论文针对系统应用的环境,从软件和硬件两方面对系统进行了可靠性设计,从而使系统更加稳定可靠。最后,论文还通过实验对系统各项功能进行了考察,实验表明系统声光报警、抑制报警、液晶显示等各项功能基本实现了系统的设计要求。更多还原

【Abstract】 The traffic safety condition is becoming increasinglyserious in recent years. The trafficaccidents have become a worldwide problem, which make great lost to the families andcountry. The statistic shows that the accidents resulted from Rear-end Collision are in themajorityamongtheaccidentsinexpressway.ThestatisticshowsthattheRear-endCollisionisof the majority in all expressway accidents. Therefore it becomes an urgent necessity todevelopahigh-performancedCollisionWarningSystem.This dissertation conducts both the dynamic and kinematic analysis of the automobilebraking process. Referring to many research fruits in automobile anti-collision of the world,thedissertationestablishesasimpleandapplicablemodelofanti-collisionalarmsystembasedon the automobile’s movement status. By analyzing the cause of Rear-end Collision, thedissertation put forward the system requirements and then designs scheme. The whole systemconsists ofvarious sensors,datacollectioncircuit,alarmingcircuit ofsoundandlight,displaycircuitofLCDscreen.Thehigh-poweredchip-S3C44B0X ,asthecentralprocessingunit,is used to control all the circuits for improving real-time character of the system. Thisdissertation also analyzes and compares the sensors, then complete the hardware system. Thesystem software is programmed with C and assembly language and debug on the hardware.Accordingtheenvironmentoftheautomobile,manyeffectivemeasuresfromthesoftwareandhardware are adopted to enhance the reliabilityof the system. At last, experiments are carriedout on the Collision Warning System and it is confirmed that the system basically meets thedesignrequirements.更多还原