汽车倒车时,由于后视野不良或无后视野而常常发生交通事故,轻则损坏车辆,重则引起人身事故。本文绘出一种基于超声波测距原理的装置,可有效防止此类事故的发生。 本装置采用单片机控制,用四个超声换能器,分时扫描车辆后方不同方位(左、中、右),用不同颜色灯光及不同频率声音信号,显示障碍物离车尾的距离与方位,使司机在驾驶室内即可知道车后障碍物的具体位置,保证行车安全。 Car reversing, due to poor rear view or no rear view and often accidents, ranging from damage to vehicles, heavy cause personal accident. This article draws a device based on ultrasonic ranging principle, which can effectively prevent the occurrence of such accidents. The device uses single-chip microcomputer control, with four ultrasonic transducers, scanning the vehicle at different times (azimuth, left and right) in different times, using different color lights and different frequency sound signals to display the distance and azimuth of the obstacle from the rear of the vehicle, So that drivers in the cab to know the specific location of the car behind the obstacles to ensure traffic safety.