基于AT89S52单片机的交通控制

电子信息工程论文编号:DZXX347  论文字数:653,页数:23  附任务书，开题报告，中期检查

目 录
摘 要 Ⅰ
ABSTRACT Ⅱ
第1章  绪 论 1
1.1  课题来源 1
1.2  课题背景 1
1.3  国内外在该方向的研究现状及分析 1
第2章  系统总体分析和设计 2
2.1   系统整体结构设计 2
2.2 系统主要器件 2
2.2.1 MCU的选择和简介 2
2.2.2 状态灯模块 5
2.2.3 倒计时显示模块 6
2.2.4 车辆检测模块 8
2.2.5 系统复位电路 9
2.3 系统总体硬件电路设计 9
第3章  系统软件设计 11
3.1  总体设计构思 11
3.2  系统流程和设计 11
结 论 19
参考文献 20

摘 要
 随着全球经济的飞速发展，汽车的普及率大幅度提高，城市交通问题也日益严重。面对越来越拥挤的交通、有限的资源和财力以及环境的压力，需要依靠提供道路设施之外的其它方法来满足日益增长的交通需求。为了解决日益严重的城市交通问题，如何对现有交通进行有效的管理和控制已成为我国交通运输中迫切需要解决的问题。城市交通信号控制系统是解决交通拥挤的强制性手段之一，用于城市道路交通控制与管理，实现交通信号的智能控制，通过有规律的控制和运用交通信号使车辆有秩序地驶离冲突区域。因此如何有效的使用现有的交通控制手段，使交通得以改善成为当前相关学科研究的重点之一。
 本文针道路交通拥挤，交叉路口经常出现拥堵的情况，利用单片机控制技术、LED显示、车辆检测技术，从硬件设计和软件设计两个方面分别介绍了通用小型实时交通控制系统的设计方法。
 系统以AT89S52为控制器，实现十字路口交通灯的控制。通过对各个路口来往车辆的流量和速度的实时检测，并根据检测的结果动态、实时地控制当前交通灯时间，使LED显示器进行倒计时工作并与状态灯保持同步，可在保证交通安全的前提下最大限度地提高交通效率。
 关键词：单片机；交通灯；实时检测；

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;