摘要随着社会的发展，经济的进步，越来越多的汽车涌上了街头，随之带来交通事故的增多
因此汽车防撞系统受到了跟多人的重视
而由毫米波雷达、激光雷达以及 CCD 立体视觉系统组成的汽车防撞系统因成本高而无法应用与普通的汽车
超声波测距系统组成的汽车防撞系统，具有成本低、受外界影响小的优点，因此研究大作用距离超声波测距系统组成的汽车防撞系统具有十分重要的意义
本文采用超声换能器组成的超声波测距系统设计实现汽车防撞系统
整个系统包括超声波发射与接收系统，单片机控制器，LED 显示部分，扫描驱动部分
关键词：汽车防撞系统超声换能器大作用距离测距系统Abstract With the development of social and economic progress, an increasing number of cars appear on the streets, which bring more and more traffic accidents
As a result, vehicle collision avoidance systems are paid great attention to
But the vehicle collision avoidance system composed of millimeter-wave radar, laser radar and CCD three-dimensional visual system are too expensive to be used in ordinary cars
The vehicle collision avoidance system using Ultrasonic Ranging has two great advantages, such as low cost and not
