【正文】 I畢業(yè)論文設(shè)計基于51單片機的溫度控制系統(tǒng)II摘要在日常生活中溫度在我們身邊無時不在，溫度的控制和應(yīng)用在各個領(lǐng)域都有重要的作用。很多行業(yè)中都有大量的用電加熱設(shè)備，和溫度控制設(shè)備，如用于報警的溫度自動報警系統(tǒng)，熱處理的加熱爐，用于融化金屬的坩鍋電阻爐及各種不同用途的溫度箱等，這些都采用單片機技術(shù)，利用單片機語言程序?qū)λ鼈冞M(jìn)行控制。而單片機技術(shù)具有控制和操作使用方便、結(jié)構(gòu)簡單便于修改和維護(hù)、靈活性大且具有一定的智能性等特點，可以精確的控制技術(shù)標(biāo)準(zhǔn)，提高了溫控指標(biāo)，也大大的提高了產(chǎn)品的質(zhì)量和性能。由于單片機技術(shù)的優(yōu)點突出，智能化溫度控制技術(shù)正被廣泛地采用。本文介紹了基于單片機 AT89C51 的溫度控制系統(tǒng)的設(shè)計方案與軟硬件實現(xiàn)。采用溫度傳感器 DS18B20 采集溫度數(shù)據(jù)，7 段數(shù)碼管顯示溫度數(shù)據(jù)，按鍵設(shè)置溫度上下限，當(dāng)溫度低于設(shè)定的下限時，點亮綠色發(fā)光二極管，當(dāng)溫度高于設(shè)定的上限時，點亮紅色發(fā)光二極管。給出了系統(tǒng)總體框架、程序流程圖和 Protel 原理圖，并在硬件平臺上實現(xiàn)了所設(shè)計功能。關(guān)鍵詞：單片機 溫度控制系統(tǒng) 溫度傳感器IIIAbstractIn daily life, the temperature in our side the everpresent, the control of the temperature and the application in various fields all have important role. Many industry there are a large number of electric heating equipment, and the temperature control equipment, such as used for alarm automatic temperature alarm systems, heat treatment furnace, used to melt metal crucible resistance furnace, and all kinds of different USES of temperature box and so on, these using single chip microputer, using single chip puter language program to control them. And singlechip microputer technology has control and convenient in operation, easy to modify and maintenance of simple structure, flexibility is large and has some of the intelligence and other characteristics, we can accurately control technology standard to improve the temperature control index, also greatly improve the quality of the products and performance. Because of the advantages of the single chip microputer intelligent temperature control technology outstanding, is being widely adopted. This paper introduces the temperature control based on single chip microputer AT89C51 design scheme of the system and the hardware and software implementation. The temperature sensor DS18B20 collection temperature data, 7 period of digital pipe display, the upper and lower limits of temperature button when temperature below the setting of the lower limit, light green leds, when the temperature is higher than the set on the limit, light red leds. Given the system framework and program flow chart and principle chart, and in Protel hardware platform to realize the function of the design. Keywords： SCM Temperature control system Temperature sensorsIV目錄摘要 ...........................................................................................................................IABSTRACT ............................................................................................................II第一章 前言 .............................................................................................................1 溫度控制系統(tǒng)設(shè)計發(fā)展歷史及意義 ..................................................................................1 溫度控制系統(tǒng)的目的 ..........................................................................................................1 溫度控制系統(tǒng)完成的功能 ..................................................................................................1第二章 總體設(shè)計方案 .............................................................................................2 方案一 ..................................................................................................................................2 方案二 ..................................................................................................................................2 DS18B20 簡介 .......................................................................................................................5 封裝與引腳 .....................................................................................................5 DS18B20 的簡單性能 ...................................................................................................5 DS18B20 的工作原理 .....................................................................................5 DS18B20 的測溫原理 .....................................................................................6 測溫原理: ....................................................................................................................6 DS18B20 的溫度采集過程 ...........................................................................................9第四章 單片機接口設(shè)計 .......................................................................................10 設(shè)計原則 ............................................................................................................................10 單片機引腳連接 ................................................................................................................10 單片機引腳圖 ............................................................................................................10 串口引腳 ....................................................................................................................11第五章 硬件電路設(shè)計 .