交通信号灯控制器的设计研究报告.doc
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课 程 设 计(论文)
课 程 设 计(论文)
课程名称: 文献检索
题 目: 交通信号灯的设计
学 院 信息工程学院
学生姓名
学 号
专业层次 本 科
班 级 电子信息工程
任课教师
交通信号灯的设计
摘要:改革开放以来,随着社会的飞速发展,人民的生活水平日益提高,城市交通问题凸显的尤为严重,尤其是在城市街道的十字路口,频繁发生交通问题,为了保证交通秩序和行人安全,一般在每条街上都有一组红、黄、绿交通信号灯。其中红灯亮,表示道路禁止通行;黄灯亮表示该道路上未过停车线的车辆禁止通行,已经过停车线的的车辆继续通行;绿灯亮表示道路允许通行。交通灯控制电路可以自动控制十字路口的红、黄绿交通灯。交通灯通过不同时刻的状态转换,保证行人的人生安全,实现十字路口交通管理自动化。交通信号灯常用于十字路口,用来控制车辆的流量,提高交叉路口车辆的通行能力,减少交通事故。交通灯主要是由秒脉冲发生器、定时器、控制器、译码显示电路组成。秒脉冲发生器由精确度较高的晶振产生,定时器由7490实现,控制器由74LS153或者74LS90组成,译码电路采用74LS48和七段数码管来显示。控制器通过反馈信号对定时器进行控制,从而进行精确的红黄绿等变化,保证行人的生命安全。
关键词:交通灯; 精确计时;自动化控制;集成。
Abstract:Since the reform and opening, with the rapid development ofsociety, peoples living standard is increasing day by day, urban transport problems highlighted particularly serious, especially in the city streets cross the fork, frequent traffic problems, in order to ensure the safety of the pedestrians and traffic order, generally in every street has a set of red, yellow and green traffic lights.The red light, said road no thoroughfare;Yellow light indicates that the road vehicles have not you ban, vehicles have been after you continue;Green light said road to allow passage.Traffic lights control circuit can automatically control the intersection of red, yellow and green traffic lights.Traffic lights through the state transition of different time, directing traffic to normal traffic.To ensure the safety of pedestrians in life, realize the intersection traffic management automation, the traffic light is often used in the intersection, used to control the flow of vehicles, improve the intersection traffic capacity, reduce the number of traffic accidents.This design mainly by the second traffic light pulse generator, timer, controller, decoding display circuit.Second pulse generator is produced by the precision higher crystals, by the 7490 implementat
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