【正文】 多倍的反向電壓，如果沒有續(xù)流二極管 D2讓 關斷瞬間保持原電流方向的電流構成回路，以消耗線圈中存儲的電能，將會反向擊穿9015從而可能造成器件損毀。在此設計中主要應用于開關應用，選用的 C 型號的 9015。它具有 控制系統(tǒng) （又稱輸入回路）和被控制系統(tǒng)（又稱輸出回路）之間的互動關系。如圖 310 環(huán)境明暗檢測 模塊電路 次便 現(xiàn) 對 環(huán)境 明 暗 程度信號的向模擬信號轉換，最終向數(shù)字信號的轉換，也就 9 使系統(tǒng)能對環(huán)境明暗程度信號間接的進行相應的分析并處理。光敏電阻在一定的外加 電壓 下，當沒有光照射的時候，流過的電流稱為暗電流。當要進行 A/D轉換時，須先將 CS使能端置于低電平并且保持低電平直到轉換完全結束。獨立的芯片使能輸入，使多器件掛接和處理器控制變的更加方便。 具體 時序圖如 圖 33 所示。 DS1302 與單片機之間能簡單地采用同步串行的方式進行通信 ， 僅需用到三個口線 ： RES 復位 、I/O 數(shù)據(jù)線 和 SCLK 串行時鐘 。運行 Keil 軟件需要 WIN9 NT、 WIN20WINXP 等操作系統(tǒng)。它不僅具有其它 EDA 工具軟件的仿真功能，還能仿真單片機及外圍器件。近年來，隨著科技的不 斷發(fā)展，各種路燈控制器也被不斷的研究出來。伴隨著路燈數(shù)量的急劇增加，照明 系統(tǒng)中所存在的問題也日益突出，耗電量大就是其中最為突出的一個。s modernization, a large number of applications for electronic products also led to rapid growth in electricity consumption. Another fact is that this relative power resources has bee a scarce resource type. How to saving energy has bee a hot topic in recent years, worldwide research. Currently street lighting has bee part of a city and the beautification lighting and night indivisible more irreplaceable. In terms of energyefficient lights, automatic street light control system merits of pivotal. Due to the microcontroller with high integration, processing capacity, high reliability, simple structure, lowcost advantages, so the street lighting project has been widely used. The study design microcontrollerbased intelligent street light control system in our country is on the existence of a huge city lighting energy consumption and the development of new energysaving control system. This paper presents the architecture and design of intelligent street light control system, a detailed analysis of its working principle and to AT89S51 as the main control unit hardware and software design of each module. Keywords: intelligent street lighting, SCM, timeshare regulator,light regulator 目 錄 1 緒論 ............................................................................................................................ 1 設計背景 ............................................................................................................. 1 設計的意義 ......................................................................................................... 1 國內(nèi)外現(xiàn)狀分析 ................................................................................................. 1 論文的主要內(nèi)容 ................................................................................................. 2 2 PROTEUS 仿真軟件與 KEIL......................................................................................... 2 PROTEUS 仿真軟件 ............................................................................................... 2 KEIL ...................................................................................................................... 2 3 硬件設計 .................................................................................................................... 3 按鍵模塊 ............................................................................................................ 3 計時模塊 ............................................................................................................ 3 計時模塊的軟件設計 ................................................................................... 3 計時模塊的硬件設計 ................................................................................... 5 光線強弱檢測模塊 ............................................................................................ 5 ADC0832 綜述 ............................................................................................ 5 光敏電阻的介紹 ......................................................................................... 7 光線強弱檢測模塊的硬件電路設計 ......................................................... 8 路燈控制模塊 .................................................................................................... 9 繼電器的概述 ............................................................................................. 9 PNP 型三極管的概述 ................................................................................. 9 路燈控制模塊的硬件電路設計 ............................................................... 10 4 軟件設計 ................................................................................................................... 11 程序模塊分類及功能 ..........................................................