十字路口交通燈

電子信息工程論文編號(hào):DZXX351  論文字?jǐn)?shù):8829,頁數(shù):28  附任務(wù)書，開題報(bào)告，中期檢查，匯編程序
 
 目  錄
摘  要 1
ABSTRACT 2
第1章  緒  論 3
1.1  交通燈發(fā)展概述 3
1.2  課題背景和意義 3
1.3  課題的任務(wù)和實(shí)現(xiàn)的主要功能 4
第2章  系統(tǒng)總體分析和設(shè)計(jì) 5
2.1  系統(tǒng)工作原理 5
2.2  交通管理的方案論證 6
2.3控制時(shí)序圖 6
第3章  系統(tǒng)硬件設(shè)計(jì) 8
3.1  MCS-51芯片介紹 8
3.2 看門狗電路 10
3.3 74LS373簡(jiǎn)介 11
3.4  鍵盤電路 11
3.5 電源模塊 12
3.6 系統(tǒng)顯示電路 12
3.7 報(bào)警電路 13
3.8 系統(tǒng)硬件電路圖 13
第4章  系統(tǒng)軟件設(shè)計(jì) 15
4.1  每秒鐘的設(shè)定 15
4.2 計(jì)數(shù)器硬件延時(shí) 15
4.2.1 計(jì)數(shù)器初值計(jì)算 15
4.2.2 計(jì)算公式 15
4.2.3 １秒的方法 15
4.2.4  相應(yīng)程序代碼 16
4.3 軟件延時(shí) 16
4.4  時(shí)間及信號(hào)燈的顯示 17
4.4.1  8051并行口的擴(kuò)展 17
4.4.2  顯示原理： 17
4.4.3  8255PA口輸出信號(hào)接信號(hào)燈： 17
4.4.4  8255輸出信號(hào)與數(shù)碼管的連接： 18
4.4.5  8255與8051的連接： 18
4.5 程序設(shè)計(jì) 19
4.5.1  程序流程圖 19
4.5.2 程序源代碼 21
結(jié)  論 25
致謝 26
參考文獻(xiàn) 27

摘  要
 近年來隨著科技的飛速發(fā)展，單片機(jī)的應(yīng)用正在不斷地走向深入，同時(shí)帶動(dòng)傳統(tǒng)控制檢測(cè)日新月異更新。
 十字路口車輛穿梭，行人熙攘，車行車道，人行人道，有條不紊。那么靠什么來實(shí)現(xiàn)這井然秩序呢？靠的是交通信號(hào)燈的自動(dòng)指揮系統(tǒng)。交通信號(hào)燈控制方式很多。本系統(tǒng)采用MSC-51系列單片機(jī)Intel8051和可編程并行I/O接口芯片8255A為中心器件來設(shè)計(jì)交通燈控制器，實(shí)現(xiàn)了能根據(jù)實(shí)際車流量通過8051芯片的P1口設(shè)置紅、綠燈燃亮?xí)r間的功能；為了系統(tǒng)穩(wěn)定可靠采用了MAX692“看門狗”芯片，避免了系統(tǒng)因?yàn)樗罊C(jī)而停止工作的情況發(fā)生；顯示時(shí)間直接通過8255的PA、PB口輸出；交通燈信號(hào)通過PC口輸出；交通燈的點(diǎn)亮采用VT雙向晶閘管來控制，直接采用220V交流電源驅(qū)動(dòng)，系統(tǒng)實(shí)用性強(qiáng)、操作簡(jiǎn)單、擴(kuò)展性強(qiáng)。
 在實(shí)時(shí)檢測(cè)和自動(dòng)控制的單片機(jī)應(yīng)用系統(tǒng)中，單片機(jī)往往是作為一個(gè)核心部件來使用，僅單片機(jī)方面知識(shí)是不夠的，還應(yīng)根據(jù)具體硬件結(jié)構(gòu)，以及針對(duì)具體應(yīng)用對(duì)象特點(diǎn)的軟件結(jié)合，加以完善。
 
 
 關(guān)鍵詞  單片機(jī)  交通燈  控制器  設(shè)計(jì)  實(shí)現(xiàn)
 
ABSTRACT
 In recent years along with science and technology develop fast, the application of single flat machine is moving towards thorough continuously, at the same time drive traditional control detection day the benefit of new moon update.
  Crossroads of the shuttle vehicles, pedestrian Xi Rang, turn to be all right lane, person pedestrian says , methodically. Do you lean what to realize this orderly order? What lean is that the automatic command system of traffic signal lamp. Traffic signal lamp control way is many . This system adopts MSC-51 series only flat machine Intel8051 with but programming parallel interface chip 8255 A of I/O is central device the design controler of traffic lights, haverealized can measure according to actual wagon flow the P1 installation bonus and green light that passes through 8051 chips burn to light the function of time; For system stabilize reliable have adopted MAX692 the chip " dog looks after the house ", have avoided that system stops working condition because of halting to occur; Show that time is directly exported through PB and PA of 8255; The signal of traffic lights is exported through usually PC mouth; The point of traffic lights light to adopt VT two-way Jing floodgate pipe come to control, directly drive with the alternating current source of 220 V, practicality is strong, operating is simple.
 
 Keywords: Only flat machine  Traffic lights  Controler  Design  Realize