毕业设计： 基于单片机的超声波倒车雷达设计.doc

2013届学士学位论文 基于单片机的超声波倒车雷达设计 学院、专业  研 究 方 向 超声波测距 学 生 姓 名 学 号 指导教师姓名 指导教师职称 副教授 2013年4月26日  超声波倒车雷达的设计 摘 要 论文介绍了一种超声波倒车雷达即一套能够实时告知驾驶员车后障碍物情况的辅助倒车装置。 论文叙述了选题的背景、意义以及超声波倒车雷达的发展概况；提出了单片机控制的超声波倒车测距系统的设计方案。论文介绍了多种测距方式、显示方式并分析了各种方式的优缺点 。从系统的性能需求、实用要求出发，对系统组成、检测原理和方法作出选择并对软硬件进行了设计。文章概述了超声波测距的基本原理以及影响因素；并详细叙述了系统的硬件设计过程，给出了软件流程图及软件各个功能部分的设计。使读者对该倒车雷达有较深入的认识，具有一定的意义。 关键词 倒车雷达；超声波；测距；AT89S52  The Design of The Ultrasonic Vehicle Revering Radar Abstract This paper introduces a kind of Ultrasonic Vehicle Revering Radar. It is a set of assistant installation applied on auto back-up that can informs driver of the obstacles after his car . This paper reate of the background and meaning of the subject and the development of The Ultrasonic Vehicle Revering Radar. This article point out the design scheme that is a ultrasonic distance measurement system controlled by MCU.This paper not only introduces many kinds of distance-measurement mode and display mode but also analyzes the advantages and shortages of each method。in view of systematic conditions ,efficiency and a realistic set of requirements of it,it presents the design not only about the systematic components ,inspecting methods and ways ,but about the software and hardware . the thesis summarizes the fundamentals and affecting factors about the ultrasonic measuring distance system,specifying the designing process of hardware and presenting software flow chart and the designing of various parts of different kinds of function. the thesis contributes a lot helping to the reader gain a deeper understanding of this kind of backing-bus radar. Keywords Reversing Radar; Ultrasonic;Distance measurement; AT89S52 目 录 1 绪论 1 1.1 选题意义 1 1.2 倒车雷达的发展 1 2方案选择 3 2.1 告警提示方式和测距方式选择 3 2.2 系统总体方案确定 6 2.3系统方案存在的问题 7 3 超声波倒车雷达的工作原理 8 3.1