畢業論文

畢業論文

智能數字電壓表設計

智能數字電壓表設計

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摘要

隨著微電子技術和計算機技術的迅速發展，特別是單片機的出現和發展，使傳統的電子測量儀器在原理、功能、精度及自動化水平等方面發生了巨大的變化，形成一種新一代的測量儀器——智能儀器。目前大多數的傳統儀器都有了相應的智能替代產品，還出現了不少全新的儀器類型和測試系統。

論文主要介紹了利用A /D轉換器MC14433、AT89S51單片機和LED數碼管構成具有三位半顯示、4檔量程的智能數字電壓表。電壓表同時還具有標定(AX+B)，自動零點調整和上下限報警(LMT)等功能。

本次設計主要講述了電壓表的構成和怎樣實現各個硬件部分的通信，以及主體部分的程序實現。利用所學的單片機知識來編寫控制程序，利用電子電路的知識來設計硬件之間的連接。智能數字電壓表具有精度高，抗干擾能力強，還具有很強的數據處理能力。

關鍵詞：數字電壓表 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

目錄

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

Abstract PAGEREF _Toc105755205 \h II

目錄 PAGEREF _Toc105755206 \h III

前言 PAGEREF _Toc105755207 \h 1

1概述 PAGEREF _Toc105755208 \h 3

1.1智能數字電壓表結構 PAGEREF _Toc105755209 \h 3

1.2智能數字電壓表功能及技術指標 PAGEREF _Toc105755210 \h 4

2硬件電路設計 PAGEREF _Toc105755211 \h 7

2.1 MCS-51系列單片機介紹 PAGEREF _Toc105755212 \h 7

2.1.1概述 PAGEREF _Toc105755213 \h 7

2.1.2 AT89S51單片機 PAGEREF _Toc105755214 \h 10

2.2 模擬部分電路設計 PAGEREF _Toc105755215 \h 12

2.2