基于AT89S52單片機的交通控制

電子信息工程論文編號:DZXX347  論文字數:653,頁數:23  附任務書，開題報告，中期檢查

目 錄
摘 要 Ⅰ
ABSTRACT Ⅱ
第1章  緒 論 1
1.1  課題來源 1
1.2  課題背景 1
1.3  國內外在該方向的研究現狀及分析 1
第2章  系統總體分析和設計 2
2.1   系統整體結構設計 2
2.2 系統主要器件 2
2.2.1 MCU的選擇和簡介 2
2.2.2 狀態燈模塊 5
2.2.3 倒計時顯示模塊 6
2.2.4 車輛檢測模塊 8
2.2.5 系統復位電路 9
2.3 系統總體硬件電路設計 9
第3章  系統軟件設計 11
3.1  總體設計構思 11
3.2  系統流程和設計 11
結 論 19
參考文獻 20

摘 要
 隨著全球經濟的飛速發展，汽車的普及率大幅度提高，城市交通問題也日益嚴重。面對越來越擁擠的交通、有限的資源和財力以及環境的壓力，需要依靠提供道路設施之外的其它方法來滿足日益增長的交通需求。為了解決日益嚴重的城市交通問題，如何對現有交通進行有效的管理和控制已成為我國交通運輸中迫切需要解決的問題。城市交通信號控制系統是解決交通擁擠的強制性手段之一，用于城市道路交通控制與管理，實現交通信號的智能控制，通過有規律的控制和運用交通信號使車輛有秩序地駛離沖突區域。因此如何有效的使用現有的交通控制手段，使交通得以改善成為當前相關學科研究的重點之一。
 本文針道路交通擁擠，交叉路口經常出現擁堵的情況，利用單片機控制技術、LED顯示、車輛檢測技術，從硬件設計和軟件設計兩個方面分別介紹了通用小型實時交通控制系統的設計方法。
 系統以AT89S52為控制器，實現十字路口交通燈的控制。通過對各個路口來往車輛的流量和速度的實時檢測，并根據檢測的結果動態、實時地控制當前交通燈時間，使LED顯示器進行倒計時工作并與狀態燈保持同步，可在保證交通安全的前提下最大限度地提高交通效率。
 關鍵詞：單片機；交通燈；實時檢測；

ABSTRACT
 With the development of global economic,the popularization rate of vehices have been increased a lot,which makes the traffic situation more heavy.Faceing the increasingly crowded traffic with limited resources and financial also with the pressure of environment.In addition to road infrastructure we need to relay on other mothods to meet the growing traffic demand.In order to solve the increasingly serious traffic problems,how to carry on effective management and control to the existing traffic becomes an urgent problem which should be solved in transportation of our country.The control system of urban traffic signal is one of the mandatory methods to solve the problem.The system is used to control and manage the urban road traffic,to realize the intellectual control of traffic signal,to make the vehicles sail out of the conflict  area.Therefore,how to use the existing traffic control measures to improve the traffic has become the focus of the related disciplines.
 In view of the crowded traffic and traffic jam of the crossing,this paper presents the design methods of the general small real –time transportation supervisory system from two aspects of hardware design and software design,based on computer control,LED display and vehicle examination technology.
 This system takes AT89S52 as the controller to realize the traffic lamp control of the crossroad.According to the results of examination,the system can control the current traffic light time,make the LED monitor to carry on the countdown work and maintain the synchronization with the condition lamp.This system can enhance the transportation efficiency with the maximum limit and safely. 
 Keywords: Single Chip Microcomputer; Traffic Lamp; Real–time examination;