摘 要
随着我国汽车保有量的增多和交通事业的快速发展，交通事故率居高不下，交通安全成为越来越重要的社会问题，引起了人们的普遍关注。为有效降低事故率，文中介绍了以一种以AT89S51单片机为核心的结构简单、精度较高、测距较长、可靠性较高的汽车防撞击系统。它主要由激光测距传感器、单片机和控制器组成。该装置安装在车辆前部，对本车与前车进行持续监视。在有险情发生前，它能及时发出声光报警，提醒驾驶员注意，并且在危险情况下采取自动制动措施，从而达到有效预防追尾碰撞事故发生的目的。
关键词 汽车防撞；单片机；激光测距；交通安全
ABSTRACT
Along with the increase in car ownership and the development of transport, the traffic crash rate is keeping in a high level. The traffic safety also becomes more and more important so that people always pay attention to it. To reduce amount of accidents, this paper presents a kind of intelligent automobiles accident avoiding control system based on AT89S51 for automobile, which have the characteristics of a simple frame, high accuracy, long distance and high reliability. The device consists of Laser range sensor, SCM and controllers. Installed in the front of vehicle, the control system can exactly measure the distance between a moving automobile and the roadblock before it, and shows the distance immediately and gives an alarm by emitting voice and light. And the system can automatically brake when the car in a dangerous, thus avoiding the occurrence of traffic accidents.
Keywords automotive; anti-collision; SCM; laser ranging; traffic safety
