【正文】 基于 51 單片機(jī)溫濕度采集控制系統(tǒng) II ABSTRACT Temperature and humidity control system has already bee one of the most popular areas of today39。s industrial and agricultural production life must first consider important. Therefore the social production and living an urgent need for a cheap, easy operation and high precision temperature and humidity control system. The system design is the use of the AT89C52 microcontroller temperature and humidity parameters for testing so as to realize the control of temperature and humidity parameters. This design by using AT89C52 microcontroller, the DHT11 sensor module, LCD1602 LCD module diode flashing alarm module. Simple design can be substantially meet the design requirements of the design. DHT11 digital temperature and humidity sensor is responsible for the collected temperature and humidity signal is transmitted to the AT89C52 microcontroller. Temperature and humidity after AT89C52 singlechip processing, and then AT89C52 accurate temperature and humidity signal is sent to the LCD1602 LCD display module, temperature and humidity data can accurately display the LCD1602 LCD screen above, and we can set upper and lower limits of temperature and humidity, the more limiting diode flashing alarm. Keywords:AT89C52 microcontroller, the DHT11 sensor module, 1602 LCD module, diode flashing alarm module 北方民族大學(xué)學(xué)士學(xué)位論文 III 目 錄 第 1 章 緒 論 ................................................................................................................... 1 課題研究的背景 .................................................................................................. 1 課題研究的意義 .................................................................................................. 1 課題研究的主要內(nèi)容 ........................................................................................... 2 課題研究的工作原理 ........................................................................................... 2 第 2 章 系統(tǒng)總體方案系統(tǒng)設(shè)計 ........................................................................................ 3 功能要求 ............................................................................................................ 3 系統(tǒng)設(shè)計思路 ..................................................................................................... 3 方案選擇 ............................................................................................................ 3 傳感器選擇方案 ....................................................................................... 3 顯示器選擇方案 ....................................................................................... 4 單片機(jī)主芯片選擇方案 ............................................................................. 4 總體系統(tǒng)設(shè)計框圖 .............................................................................................. 4 第 3 章 系統(tǒng)硬件系統(tǒng)設(shè)計 ............................................................................................... 6 概述 ................................................................................................................... 6 主控模塊系統(tǒng)設(shè)計 .............................................................................................. 6 ATC89C52 芯片的簡介 ............................................................................... 6 主控模塊電路原理圖 ................................................................................ 7 DHT11 傳感器模塊系統(tǒng)設(shè)計 ................................................................................ 7 DHT11 傳感器簡介 .................................................................................... 7 DHT11 傳感器模塊電路系統(tǒng)設(shè)計 ............................................................... 9 1602 液晶顯示模塊系統(tǒng)設(shè)計 ............................................................................... 9 1602 液晶顯示屏簡介 ............................................................................... 9 1602 液晶顯示模塊電路原理圖 ................................................................ 11 報警模塊 ........................................................................................................... 11 二極管工作原理 ...................................................................................... 11 第 4 章系統(tǒng)軟件 系統(tǒng)設(shè)計 ................................................................................................13 LCD1602 液晶顯示模塊系統(tǒng)設(shè)計 ........................................................................13 傳感器模塊系統(tǒng)設(shè)計 ..........................................................................................14 第 5 章 系統(tǒng)分析與調(diào)試 ..................................................................................................15 第 6 章 結(jié)論與展望 .........................................................................................................17 參考文獻(xiàn) .........................................................................................................................18 致 謝 ..............................................................................................................................19 附 錄 ..............................................................................................................................20 附錄 A 外文文獻(xiàn) ......................................................................................................20 附錄 B 硬件原理圖 ..................................................................................................26 附錄 C 程序清單 ......................................................................................................27 北方民族大學(xué)學(xué)士學(xué)位論文 第 1 頁 共 36 頁 第 1 章 緒 論 課題研究的背景 作為現(xiàn)代工農(nóng)業(yè)生產(chǎn)生活中非常重要物理參數(shù)之一的溫濕度，在當(dāng)今的工農(nóng)業(yè)生產(chǎn)生活中，時刻需要我們關(guān)心生產(chǎn)生活場所的它們變化。動物植物 只有在最適合的生長條件下，才能更好更快地生長，養(yǎng)殖生產(chǎn)場才能獲取最大的生產(chǎn)效益和經(jīng)濟(jì)效益。隨著社會的發(fā)展以及人們對生產(chǎn)生活自動控制的需求和經(jīng)濟(jì)技術(shù)的絕對支持，使的第二次世界大戰(zhàn)以后溫濕度控制系統(tǒng)快速穩(wěn)健地蓬勃發(fā)展起來了。 課題研究的意義 AT89C52 單片機(jī)是現(xiàn)代工農(nóng)業(yè)生產(chǎn)生活中非常常見用于控制系統(tǒng)設(shè)計的應(yīng)用芯片，同時在大學(xué)期間，在我們的實踐生活中，我們大 部分接觸的也是 AT89C52這類簡單實用的單片機(jī)芯片。本系統(tǒng)設(shè)計主要使用 AT89C52 單片機(jī)來系統(tǒng)設(shè)計控制進(jìn)而實現(xiàn)溫濕度的檢測，顯示，上下限報警， 本