毕业论文

毕业论文

智能数字电压表设计

智能数字电压表设计

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摘要

随着微电子技术和计算机技术的迅速发展，特别是单片机的出现和发展，使传统的电子测量仪器在原理、功能、精度及自动化水平等方面发生了巨大的变化，形成一种新一代的测量仪器——智能仪器。目前大多数的传统仪器都有了相应的智能替代产品，还出现了不少全新的仪器类型和测试系统。

论文主要介绍了利用A /D转换器MC14433、AT89S51单片机和LED数码管构成具有三位半显示、4档量程的智能数字电压表。电压表同时还具有标定(AX+B)，自动零点调整和上下限报警(LMT)等功能。

本次设计主要讲述了电压表的构成和怎样实现各个硬件部分的通信，以及主体部分的程序实现。利用所学的单片机知识来编写控制程序，利用电子电路的知识来设计硬件之间的连接。智能数字电压表具有精度高，抗干扰能力强，还具有很强的数据处理能力。

关键词：数字电压表 AT89S51 MC14433

Abstract

With the technological development of computer and microelectronics, and with the appearance of siglechip and fast development, It makes a lot of change in tradition electronic apparatus of measure.A new kind of electronic apparatus of measure is appear.Now,most of traditional testing measure have substitute that is aptitude instrument, also come from more new apparatus types and test systems.

This paper mainly introduce the digital voltage meter consist of A/D swith utensil the type is MC14433, the singlechip type is AT89S51 ,and display of LED which is have three bit display.The digital voltage meter’s function is have 4 bit display , demarcate (Ax+B), self-motion zero adjust,and the limit of fluctuate.

This paper introduce how to make of the digital voltage meter and how to come ture the communicate between of hardware with use the language of singlechip . The advantage of digital voltage meter is high precision,the ability of anti-jamming is very strong,and the ability of data processing is very strong too.

Keywords: digital voltage meter, AT89S51, MC14433

目录

TOC \o "1-3" \u 摘要 PAGEREF _Toc105755204 \h I

Abstract PAGEREF _Toc105755205 \h II

目录 PAGEREF _Toc105755206 \h III

前言 PAGEREF _Toc105755207 \h 1

1概述 PAGEREF _Toc105755208 \h 3

1.1智能数字电压表结构 PAGEREF _Toc105755209 \h 3

1.2智能数字电压表功能及技术指标 PAGEREF _Toc105755210 \h 4

2硬件电路设计 PAGEREF _Toc105755211 \h 7

2.1 MCS-51系列单片机介绍 PAGEREF _Toc105755212 \h 7

2.1.1概述 PAGEREF _Toc105755213 \h 7

2.1.2 AT89S51单片机 PAGEREF _Toc105755214 \h 10

2.2 模拟部分电路设计 PAGEREF _Toc105755215 \h 12

2.2