【正文】 畢 業(yè) 設 計 [論 文 ]題 目： 家用可調光 LED 照明系統(tǒng)設計 學 院： 電氣與信息工程學院 專 業(yè)： 自動化 姓 名： 指導老師： 葛廣軍 完成時間： 2022 年 5 月 24 日 河南城建學院本科畢業(yè)設計（論文） 摘要 摘 要作為一種光源，調光是很重要的。不僅是為了在家居中得到一個更舒適的環(huán)境，在今天來說，減少不必要的電光線，以進一步實現節(jié)能減排的目的是更加重要的一件事。而且對于 LED 光源來說，調光也是比其他熒光燈、節(jié)能燈、高壓鈉燈等更容易實現，所以更應該在各種類型的 LED 燈具中加上調光的功能。該系統(tǒng)硬件電路由四個部分組成：感光電路、AD 轉換電路、單片機控制電路、發(fā)光二極管驅動電路?？蓪崿F自動和手動兩種控制方式。軟件部分采用PID 算法，自動調節(jié)環(huán)境光照度。本設計以 89C52 單片機為控制器，利用光敏電阻采集環(huán)境光照度，采用脈寬調制方式調節(jié)三極管，進而調節(jié) LED 的發(fā)光亮度，最終維持環(huán)境光照度在一個設定的水平。關鍵詞：發(fā)光二極管，PID 算法，照明,節(jié)能河南城建學院本科畢業(yè)設計（論文） Abstract IAbstractThe quality of dimming of light source is very important. It is not only for a better environment at home. At present, it is also an even more important issue to lessen waste of unnecessary electric light and further achieve the goal of energy saving and emission reduction. What’s more, for light source of LED, it is easier to adjust brightness than fluorescent lamp, energy saving lamp, high pressure sodium lamp and other kinds of lamps. Therefore, we’d better add the function of brightnessadjusting to various kinds of LED lamps.The hardware of adaptive adjustable opticalintensity system is consisted of four parts. They are photosensitive circuit, AD changeover circuit, singlechip microputer control circuit, and LED driving circuit. And the software of the system makes use of PID algorithm to adjust brightness of environment automatically. This design takes 89C52 SCM as controller, use photo conductive resistance to collect luminance of the environment. And the designer adopt pulse width modulation mode to adjust triode, which can help adjust brightness of LED to keep intensity of illumination of the environment at a set level.Keywords: LED,PID,illumination,Energy Saving 河南城建學院本科畢業(yè)設計（論文） 目錄 目錄摘 要 ............................................................................................................................IAbstract..........................................................................................................................II第 1 章 緒論 ..................................................................................................................1 選題的背景及意義 ............................................................................................1 選題的背景 ..............................................................................................1 課題的意義 ..............................................................................................3 LED 的國內外研究現狀 .....................................................................................3 本課題設計內容及要求 ....................................................................................3 LED 相關知識 .....................................................................................................4 LED 的結構及發(fā)光原理 ..........................................................................4 LED 光源的特點 ......................................................................................4 LED 的應用 ..............................................................................................5第 2 章 系統(tǒng)設計原理 ..................................................................................................7 總體設計方案 ...................................................................................................7 系統(tǒng)驅動方式選擇 ...........................................................................................8 光照檢測方式選擇 ...........................................................................................8 人體感應方式選擇 ...........................................................................................8 LED 驅動設計注意點 ........................................................................................9第 3 章 硬件設計 ........................................................................................................10 電源電路 .........................................................................................................10 感光電路 .........................................................................................................11 手動控制電路 .................................................................................................13 延時時間選擇電路 .........................................................................................13 單片機控制電路 .............................................................................................13 AT89C51 簡介 ...................................................................................14 ADC0832 簡介 ..................................................................................15 AD 轉換電路 .....................................................................................15 時鐘電路 .........................................................................................................17 發(fā)光二極管驅動電路 .....................................................................................18 相關計算 .........................................................................................................19第 4 章 軟件設計 ........................................................................................................21 主程序流程圖 .................................................................................................21 系統(tǒng)初始化 .....................................................................................................21 人體紅外感應子系統(tǒng) .....................................................................................22河南城建學院本科畢業(yè)設計（論文） 目錄 手動調節(jié)光強子系統(tǒng) .............................................