优秀毕业设计精品]智能脉冲宽度测量仪.doc

摘要
近年来随着科技的飞速发展,单片机的应用正在不断地走向深入,人们已越来越多地将单片机技术应用于一些工业控制系统。如温度、流量和压力等参数进行检测和控制。PC机具有强大的监控和管理功能,而单片机则具有快速及灵活的控制特点,因此在实时检测和自动控制的应用系统中,单片机往往是作为一个核心部件来使用。
本系统采用单片机AT89C52为中心器件来设计智能脉冲宽度测量仪,本系统是由一个555定时器来产生脉冲信号,将信号输入单片机中,然后运行程序,最后通过译码在LED数码管动态显示。本系统实用性强、操作简单、扩展性强。在现有的单片机仿真系统上掌握相关软硬件设计与调试知识,根据所选的题目,焊接好硬件电路,正确进行元器件的测试与调试,并在计算机上编写汇编程序调试运行,并实现参考选题中要求的设计。
关键词:脉冲宽度测量
Title: Intelligent Pulse Width Measuring Instrument
ABSTRACT
In recent years, with the rapid development of science and technology, the application of SCM is developing continuously. It has been increasingly used the technology of SCM to the industrial control system. Such as temperature, flow and pressure and so on. Though PC machines have powerful monitoring and management functions, in detection and automatic control application system, SCM is often used as a ponent which is rapid and flexible.
This system uses the AT89C52 as the ponent to design intelligent pulse width measuring instrument, This system generates the pulse signal which will be input the single chip puter throught a 555 timer 。 Then I run and decode the program .Finally, the result will show dynamicly on the LED system is practical, simple operation and extensible. In the existing puter simulation system hardware and software design missioning to master relevant knowledge, according to the selected topic, welding good hardware circuit and the ponents, and the testing and debugging assembly program on puter test and operation, written and realize the design requirements of the reference topics.
Keywords:Pulse Width Measurement
目录
1 前言 1
课题研究背景 1
单片机技术的发展状况 1
本文的研究内容 2
2 设计内容及具体要求 3
设计的主要任务 3
设计的具体要求 3
3 设计方案及总框架 5
设计不同方案对比 5
程控脉冲测量 5
等精度脉冲测量 5
确定方案总框架图 6
各部分框图简介 6
原理图 8
PCB板图 10
4 硬件部分原理及设计 11
单片机部分 11
功能特性描述 11
引脚功能 11
AT89C52的存储器结构 13
定时器 14
单片机内部的中断 15
脉冲产生电路 16
数码管显示电路 20
5 软件部分设计 21
Keil