基于单片机的测距仪设计.pdf

四川理工学院毕业设计 （论文） 基于单片机的测距仪设计 I 侯杰：基于单片机的测距仪设计 QQ:271021773 四川理工学院计算机学院 二 O 0 九年六月 II 基于单片机的测距仪设计 摘 要 本文详细介绍了一种基于单片机的脉冲反射式超声测距系统。该系统是以 空气中超声波的传播速度为确定条件，利用发射超声波与反射回波时间差来测 量待测距离。 论文概述了超声波检测的发展及基本原理，介绍超声传感器的工作机理及 特性，对影响测距系统的一些主要参数进行了讨论。并且在介绍超声测距系统 功能的基础上，提出了系统的总体构成。针对测距系统发射、接收、检测、显 示部分的总体设计方案进行了论证。 进一步介绍了 STC89C52RC单片机在系统中 的应用，分析了系统各部分的硬件及软件实现。 关键字 ：单片机；测距仪；超声波；超声波传感器 I The design of range finder base on single-chip ABSTRACT This paper introduces a method based on single chip pulse reflex ultrasonic ranging system. this system can measure the distance which is based on the speed ofultrasonic and used the time difference of launch ultrasonic and reflection echo. this paper summarizes the development and basic principle of the ultraonic testing,the working mechanism and characteristics of the ultrasonic sensors.there is a discussion about some major parametersof the influence ranging system.basedon the introduces of the ultrasonic ranging system function,The overall system is proposed.according to transmitting and receiving, detection, and display part of distance measuring systems overall desgin,the schemes are discussed.thefurther introduction of this paper is the application of STC89C52RC single chip microcomputer in the system, and the analysis of all the parts of the system hardware and software realization. Keywords:single chip;range finder; ultrasonic wave; ultrasonic sensor