【正文】 償。本論文針對手動控制帶來的滯后和不精準等問題，研究和設(shè)計基于單片機的溫室自動監(jiān)測和控制系統(tǒng)。 基于單片機的 溫室 溫度監(jiān)測與調(diào)控系統(tǒng) 的設(shè)計 摘 要 目前我國廣大農(nóng)村地區(qū)采用溫室和大棚進行設(shè)施栽培時大多以經(jīng)驗為主，缺乏精準化、標準化生產(chǎn)管理，已成為制約農(nóng)業(yè)產(chǎn)業(yè)進一步提升的瓶頸。溫度是影響設(shè)施農(nóng)業(yè)生產(chǎn)的最主要因子之一，其調(diào)控的有效性直接影響設(shè)施作物產(chǎn)量和品質(zhì)，通常采用手動控制卷簾和通風口等方式進行調(diào)節(jié)。 論文采用 MCS51系列的 8051為控制核心，選用性價比高的溫度傳感器 DS18B20 實現(xiàn)了對溫度的精確感知，針對作 物品種和生長階段的區(qū)別可通過鍵盤配置作物環(huán)境的預期范圍。系統(tǒng)軟件基于 C語言編寫，采用模塊化技術(shù)，開發(fā)完成數(shù)據(jù)采集模塊、鍵盤顯示模塊、報警模塊等。 關(guān)鍵詞 ： 溫室大棚；溫度；單 片機； DS18B20 Single chip microputer based greenhouse temperature monitoring and regulative system Abstract At present the greenhouse is widely used to cultivate plant in our countryside. But the big awning most lies on experience , lacks fine and standardized production management, which has bee the bottleneck. Temperature is the main factor of the influence which affect the produce of facility agriculture. It is directly influence facility crops output and the quality whether the temperature is regulated validly or not. Usually we use hand to control volume curtain and vent as the adjustment. Aiming at the questions that handcontrol brings in inaccuracy and lag, the present paper has researched and designed automatic monitor and the control system of the greenhouse , which lies on the monolithic integrated circuit. The paper uses the MCS51 series 8051 as the core. I selected performancetoprice ratio high temperature sensor DS18B20 to realize the temperature precise sensation. Aiming at the difference of the crop strains and growth stages, we can setup the crops environment anticipated scope through the keyboard. When the system has monitored that the temperature surpasses the threshold value , then the buzzer starts blead to report to the police. Simultaneously the system opens the volume curtain machine through the control of solid state relay, and mades the pensation. The system software based on the C language pilation, uses the modular technology, which can pletes the data acquisition module, the keyboard demonstrated the module, alarm module and so on. This system can made the overall evaluation of the crops39。 Temperature。 DS18B20 I 目錄 第一章 緒論 .............................................................................................................. 1 選題背景及意義 .................................................................................................. 1 國內(nèi)外研究動態(tài) .................................................................................................. 1 國外研究現(xiàn)狀 ................................................................................................ 1 國內(nèi)發(fā)展現(xiàn)狀 ................................................................................................ 2 本論文的主要內(nèi)容 ............................................................................................... 3 章節(jié)安排 ............................................................................................................. 3 第二章 硬件電路的設(shè)計 .......................................................................................... 5 系統(tǒng)整體設(shè)計方案 ............................................................................................... 5 溫度采集電路 ..................................................................................................... 5 溫度采集電路整體分析 .................................................................................. 5 溫度傳感器 DS18B20 功能分析 ...................................................................... 6 P80C51 單片機各引腳簡介 ................................................................................. 7 晶振電路 ............................................................................................................ 9 復位電路 ............................................................................................................ 9 按鍵電路 ........................................................................................................... 10 報警電路 ........................................................................................................... 11 顯示電路 ........................................................................................................... 12 外控電路 ........................................................................................................... 13 ULN2021A 介紹 .......................................................................................... 13 繼電器 SSR40DD 簡介 ............................................................................... 13 Y90L4 型電機 ............................................................................................ 14 本章小結(jié) .......................................................................................................... 14 第三章 硬件電路板制作 ........................................................................................ 15 制作軟件介紹 .................................................................................................... 15 Protel2021 性能綜述 .................................................................................... 15 Protel DXP 組成 和功能 ................................................................................ 15 整體原理圖 ........................................................................................................ 16 電路板制作 ........................................................................................................ 18 詳細的布線規(guī)則 ......................................................................................... 18 PCB 板制作 ................................................................................................. 18 本章小結(jié) ............................................................................................................ 20 第四章 軟件設(shè)計與編程 ........................................................................................ 21 主程序流