基于单片机的数字电容表研究设计.doc资源-CSDN下载

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摘要

随着工业信息化自动化的发展，数字电容表的优越性日益表现出来。由于它

具有功能强、体积小、功耗低、价格便宜、工作可靠、读数方便，精度高等特点，

因此特别适用于工业控制或与控制有关的数据处理系统，越来越广发被各个领域

和项目采用。它的结构和特点决定了他的强大用途，使得它在智能仪表、仪器、

小型检测及控制系统、家用电器中大展身手，倍受青睐。因此掌握好精密型数字

电容表制作的一般设计方法，对于工程设计和开发有十分重要的指导意义。

数字电容表结构更小，更美观，更实用，用户不需要扩充资源就可以更方便

的使用，不仅是开发简单，产品小巧美观，同时系统也更加稳定，对数字电容表

的研究，通过将科学技术应用到工业生产，从而使得人们真正体会到科技的发展

给自己的现实生活所带来的方便和舒适。

本文设计的基于单片机的数字电容表，其主要构成采用的是单片机和 LED 数

码管。它具有功能强、体积小、功耗低、价格便宜、工作可靠、读数方便，精度

高等特点，因此特别适用于工业控制或与控制有关的数据处理系统。集成芯片比

分立元器件控制电路具有更简单，更可靠的特点和易于调试的优点，可以提高电

容表工作的可靠性和性能指标。

关键词：单片机，数字电容表

Abstract

Along with the development of industrial information-based automation,

the superiority of the number electric capacity form expresses day by

河南城建学院本科毕业设计（论文）

- 1 -

day.Because it has function strong, small physical volume, achievement

consume low, price cheapness, work credibility, read number convenience,

accuracy Gao Deng's characteristics, therefore specially be applicable to

industry control or control- related data processing system, more and more

and widely deliver quilt each realm and item adoption.Its structure and

characteristics come to a decision his strong use and make it is in the

intelligence gauge, instrument, small scaled examination and control

system, home appliances big exhibition artistic skill, doubly be subjected

to favor.The general design method that consequently controls a very

precise type the number electric capacity form creation has very important

instruction meaning to the engineering design and the development.

The number electric capacity form structure is smaller, more beautiful,

more practical, it's enough that the customer doesn't need to enlarge a

resources more convenient use, not only is that the development is simple,

the product is cleverly made beautiful, at the same time system also more

stable, the research of the logarithms word electric capacity form, pass

to apply to science technique industry production, make thus people truely

realize the development of science and technology the convenience brought

by own real life and comfortable.

This text design of according to the number electric capacity of the

single slice machine form, it mainly constitutes adoptive is list slice

machine and LED figures tube.It has function strong, small physical volume,

achievement consume low, price cheapness, work credibility, read number

convenience, accuracy Gao Deng's characteristics, therefore specially be

applicable to industry control or control- related data processing

system.The integrated chip score signs a dollar spare part control electric

circuit to have more in brief, more dependable characteristics and be easy

to adjust to try of advantage, can raise the credibility and function index

sign of electric capacity form work.

河南城建学院本科毕业设计（论文）

- 3 -

第 2 章电容表制作的方案论证 ....................................- 9 -

2.1 方案一基本电路搭建 ....................................- 9 -

2.2 方案二运用单片机编程 .................................- 9 -

2.3 显示方案比较 .............................................- 9 -

方案一：静态显示 .............................................- 9 -

方案二：动态显示 ............................................- 10 -

2.4 系统框路图 ..............................................- 10 -

第 3 章单片机概述 ..............................................- 10 -

3.1 单片机及其发展概况 ......................................- 10 -

3.2 单片机技术的发展方向 ....................................- 11 -

3.3 单片机的特点及应用 ......................................- 14 -

1）单片机的特点 ....................................- 14 -

2）单片机的应用范围 .................................- 14 -

3.4 ATMEL 公司的 AT89C2051 单片机 .............................- 14 -

1） AT89C2051 性能及特点 .............................- 14 -

2） AT89C2051 主要性能 ...............................- 15 -

3.5 单片机内部结构及引脚 ....................................- 15 -

第 4 章主要单元电路设计 ......................................- 22 -

4.1 单片机电路 ..............................................- 22 -

4.2 串口 LED 显示模块 .........................................- 23 -

（1）概述 ...................................................- 23 -

（2）数码管的选取 ...........................................- 25 -

（3）数码管结构及代码显示 ...................................- 26 -

4.3 测量电路工作原理 ........................................- 27 -

4.4 测量前所作工作 ..........................................- 29 -

4.5 整体电路图 ...............................................- 29 -

第 5 章电容测试系统软件设计 .....................................- 30 -

5.1 软件的总体设计 ..........................................- 30 -

程序 1 ...................................................- 32 -

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