车辆纵向安全距离算法及其防撞预警系统研究

Research on Vehicle Vertical Safety Distance Algorithm and Anti-collision Alarm System

摘要:

为了降低交通碰撞事故,在分析车辆制动历程基础上提出了一种新的车辆纵向安全距离算法,并将安全距离分为提醒安全距离与警戒安全距离；以LPC2214单片机为核心设计了基于激光测距的防撞预警系统,采用TDC-GP2芯片作为激光飞行计时单元,给出了激光发射及回波接收放大电路,最后介绍了系统软件设计流程；在自己车速为100km/h,前方车速为0km/h与80km/h时,采用Matlab软件分别对制动历程进行仿真验证,结果符合停车要求,其算法准确、可靠,具有较强的实际应用价值；通过实验测试,系统能很好测出前方车辆距离及运行状态,及时发出报警。

Abstract:

In order to reduce collisions, based on the analysis of vehicle braking process, a new vertical safety distance algorithm is put forward in this paper, the safety distance distinguished warning distance and dangerous distance. The hardware system of anti-collision alarm system based on laser rangefinder with the LPC2214 as the core was designed, TDC-GP2 for timing laser flight. The software flow of system and amplifiers of laser transmitter and the receiver are introduced. Through Matlab test when car at 100km/h and preceding vehicle at 0km/h and 80km/h, the algorithm is precise and reliable, it has strong practical application value. The distance between the two cars can be range finding best by system through experiments.