超声波测距在汽车倒车防撞系统中的应用  

Ultrasonic Ranging in Automobile Back-draft Collision Avoidance System Application

作　　者：奠石镁[1] DIAN Shi-mei（yunan Medicine Faculty University,Kunming 650031,China）

机构地区：[1]云南医学高等专科学校,云南昆明650031

出　　处：《电脑知识与技术》2007年第2期1083-1085,共3页Computer Knowledge and Technology

摘　　要：由于超声波指向性强，能量消耗缓慢，在介质中传播的距离较远，因而超声波经常用于距离的测量，如测距仪和物啦测量仪等都可以通过超声波来实现。本文主要介绍超声波在汽车倒车防撞报警系统中的应用，以AT89C51单片机为核心的低成本、高精度、微型化数字显示超声波测距仪的硬件电路和软件设计方法。Because ultrasonic wave direction strong, energy consumption slow, disseminates the distance in the medium to be farther, thus the ultrasonic wave frequently uses in the distance survey, like the distance gauge and the thing position measuring instrument and so on all may realize through the ultrasonic wave, This article main introduction ultrasonic wave guards against in the automobile back-draft hits in the alarm system the application, take AT89C51 monolithic integrated circuit as core low cost, high accuracy, microminiaturized numeral demonstration ultrasonic wave distance gauge hardware electric circuit and software design method,

关 键 词：超声波发生器 超声波换能器 测距 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论;自动化与计算机技术—计算机科学与技术]