摘要
首先简要介绍了利用 5 1系列单片机设计测距仪的原理 :单片机发出的超声波 ,通过换能器发射出去 ,遇到被测物体后反射回来 ,利用锁相环将此反射回来的信号锁定 ,计算此超声波从发射出到接受的时间差从而得出被测物体到测距仪的距离。然后 ,举出了一个利用该原理设计的实例汽车防撞雷达 ,并介绍了其硬件设计与软件流程。最后 ,列举了工业生产中该原理的几个用途 。
At first, this paper introduces the principle of distancemeasuringdevice which is designed with the single chip processor of 51series.This principle is based on the ultrasonic measure which is calculated by the time used by ultrasonic traveling from the target. Then an example is givencar radar.Design of hardware is introduced as well as software. Finally, a few uses of the principle are enumerated and the method to improve the function of this distanceeasuringdevice is analyzed.
出处
《现代电子技术》
2004年第18期94-96,共3页
Modern Electronics Technique
关键词
单片机
超声波
测距
雷达
single chip processor
ultrasonic
distance-measurement
radar
