基于單片機控制的數(shù)字溫度計[畢業(yè)論文]

摘 要
溫度作為一個常用的物理量在我們的氣場生活中起著十分重要的作用，所以對溫度計的設計也十分必要。在此設計一種智能數(shù)字溫度計，這種溫度計有許多優(yōu)點，并且它的應用范圍非常廣泛。它通過利用控制器—AT89C52、溫度傳感器—DS18B20、數(shù)碼管—LED設計一個可以很好的轉換溫度值，并且直接顯示溫度值的數(shù)字溫度計。與傳統(tǒng)的數(shù)字溫度計相比，具有讀數(shù)方便，測溫范圍廣，測溫準確，其輸出溫度采用數(shù)字顯示的優(yōu)點。
【關鍵詞】    智能    數(shù)字   溫度計   AT89C52

Abstract
The temperature took a commonly used physical quantity is playing the extremely vital role in ours gas field life, therefore extremely is also essential to the thermometer design. In this introduced one kind of intelligent numeral thermometer, this kind of thermometer has many merits, and its application scope is extremely widespread. Its key element is: Controller - AT89C52, temperature sensor - DS18B20, nixie tube - LED ,not only therefore this kind of thermometer designs simple and is facile, is cheap, generally speaking this kind of thermometer performance-to-price ratio is very high. Its main principle is uses DS18B20 to be possible the very good transformation temperature value, and demonstrates the temperature value directly, and its performance surpassed traditional the bulb to omit, and the analog switch design. And in addition  AT89C52 volume small also may direct drive LED, and simplified the design difficulty to reduce the cost like this greatly.

 [Key word]  Intelligence   Numeral   Thermometer    AT89C52


目 錄
摘 要 I
Abstract I
目 錄 II
第一章 緒論 1
1.1數(shù)字溫度計的發(fā)展現(xiàn)狀 1
1.2數(shù)字溫度計的目的和意義 1
第二章 總體方案 2
2.1數(shù)字溫度計設計方案論證 2
2.2芯片的選擇 3
2.2.1單片機的選擇 3
2.2.2 溫度傳感器的選擇 3
2.2.3顯示器的選擇 3
第三章 DS18B20數(shù)字溫度計 5
3.1硬件模塊 5
3.1.1硬件原理圖 5
3.1.2主控制器 5
3.1.3復位電路 7
3.1.4晶振電路 7
3.1.5報警電路 8
3.1.6 顯示電路 8
3.1.7鍵盤電路 9
3.1.8溫度傳感器 10
3.1.9LED顯示器 12
3.2 軟件模塊 13
3.2.1主程序 13
3.2.2溫度轉換命令子程序 15
3.2.3讀出溫度子程序 15
3.2.4計算溫度子程序 16
3.2.5顯示數(shù)據刷新子程序 16
第四章 結論 18
4.1 Proteus圖 18
4.2數(shù)字溫度計的仿真 18
4.3總結 20
致 謝 21
參考文獻 22
附錄1： 23
源程序 23
附錄2 37
電路原理圖 37