【正文】 Ⅰ 基于單片機(jī)的溫度智能控制系統(tǒng)的軟件設(shè)計(jì) 摘要 課題是基于單片機(jī)的溫度智能控制系統(tǒng)的設(shè)計(jì)， 本設(shè)計(jì)具體到 對蔬菜大棚的溫度進(jìn)行 控制 。 蔬菜的生長與溫度息息相關(guān)，對于蔬菜大棚來說，最重要的一個(gè)管理因素是溫度控制。溫度不合適，蔬菜則停止生長或者生長速度減慢，從而造成不可估量的損失。為此，在現(xiàn)代化的蔬菜大棚 管理中通常有溫度 控制系統(tǒng)，以控制蔬菜大棚溫度，適應(yīng)生產(chǎn)需要。 單片機(jī)具有體積小、集成度高、性能穩(wěn)定、控制功能強(qiáng)、易擴(kuò)展、低功耗、價(jià)格便宜等特點(diǎn)，所以單片機(jī)市場前景廣闊。 本設(shè)計(jì)是通過單片機(jī)控制 ,來實(shí)現(xiàn)對蔬菜大棚溫度進(jìn)行 控制。系統(tǒng)以 AT89C52 單片機(jī)為基礎(chǔ) ,通過數(shù)字及模擬式對溫度進(jìn)行采集并檢測，通過顯示屏顯示當(dāng)前溫度。當(dāng)采集到的溫度高于系統(tǒng)設(shè)定值，馬達(dá)將帶動風(fēng)扇的轉(zhuǎn)動， 從而降低大棚內(nèi)溫度， 實(shí)現(xiàn)自動控制大棚里的溫度。 以此為思路設(shè)計(jì)總體電路原理圖，進(jìn)行軟件設(shè)計(jì)。 本設(shè)計(jì)總體上實(shí)現(xiàn)了對大棚溫度的控制，有優(yōu)點(diǎn)但也有不足之處，具有一定的擴(kuò)展性。 【關(guān)鍵詞】溫 度控制 軟件設(shè)計(jì) 溫度采集 降溫處理 Ⅱ Abstract Subject is intelligent temperature control system design based on single chip microputer, this design specific to temperature automatic control o f the vegetable growth of vegetables and temperature are c losely related, for vegetable shed, one of the most important management f actor is the temperature control. Temperature not appropriate, then stop th e vegetable growth or growth slowed, causing the immeasurable loss. There fore, in modern management of vegetable shed, usually with temperature a utomatic control system, to control the vegetables canopy temperature, to adapt to the requirements of production. Single chip microputer with small size, high level of integration, stable performance, easy to control function expansion, low power consum ption, price cheap and so on, so the single chip microputer wide prosp ect of design is through the singlechip microputer control, to realize the canopy temperature vegetables for automatic control. System based on single chip microputer AT89C52, through the digital and anal og temperature in acquisition and detection, through the screen shows the current temperature. When the collected temperature higher than system set ting, motors will drive the rotation of the fan to reduce the temperature in greenhouses, and realize the automatic control the temperature of the shelte r. Train of thought to design the overall circuit principle diagram, carries on the software design. This design implements the overall control of the greenhouse temperatu re, there are advantages but also have shortings, has certain extensibilit y. 【 Key words】 Temperature control software design temperature data collection Cooling process Ⅲ 目 錄 摘要 ............................................................................................................................... Ⅰ Abstract .......................................................................................................................... Ⅱ 第 1 章 緒 論 ............................................................................................................... 1 課題研究背景和意義 ........................................................................................... 1 國內(nèi)外溫度控制系統(tǒng)的發(fā)展 狀況 .......................................................................... 1 國外溫度控制系統(tǒng)的發(fā)展?fàn)顩r .................................................................... 1 國內(nèi)溫度控制系統(tǒng)的發(fā)展?fàn)顩r .................................................................... 2 課題研究的主 要內(nèi)容 ........................................................................................... 3 第 2 章 系統(tǒng)理論基礎(chǔ)及構(gòu)建 ............................................................................................ 4 AT89C52 的工作原理 ............................................................................................ 4 CPU 的結(jié)構(gòu) ................................................................................................ 4 CPU 的 I/O 口結(jié)構(gòu) ..................................................................................... 4 程序和數(shù)據(jù)存儲器 ..................................................................................... 5 定時(shí)器 ....................................................................................................... 5 中斷系統(tǒng) ................................................................................................... 5 DS18B20 檢測電路 ................................................................................................ 6 DS18B20 簡單介紹 ...................................................................................... 6 DS18B20 的性能特點(diǎn) ................................................................................... 6 DS18B20 的測溫原理 ................................................................................... 7 LCD1602 液晶顯示器 ............................................................................................ 8 LCD1602 簡介 ............................................................................................. 8 LCD1602 的指令說明及時(shí)序 ........................................................................ 8 直流馬達(dá) ............................................................................................................. 9 馬達(dá)工作的原理 ......................................................................................... 9 馬達(dá)的基本構(gòu)造 ....................................................................................... 10 第 3 章 系統(tǒng)軟件設(shè)計(jì) .................................................................................................... 11 系統(tǒng)電路原理圖 .................