智能交通灯控制系统的设计
黄秋花_
（吉首大学物理科学与信息工程学院，湖南_ 吉首_ 416000）
摘 要
___ 本设计介绍了一种智能型交通灯控制系统的设计方法。具体描述了系统控制方案、硬件选择及单片机程序设计。该系统由车辆检测电路，主控制器，紧急通行请求中断，指示灯及数码管显示等组成。依据车多通行时间长及可同时通行两车道不冲突的原则，分四种交通通行状态方案进行设计，采用压电传感器检测车辆数，在软硬件方面对现行交通灯控制进行改进，从而动态调节各方向的通行时间，大大提高了交通灯配时的时效性和车道组合的灵活性。
关键词：压电传感器；车流量检测；AT89S51；数码管显示；智能控制
Design of Intelligent Traffic Light Control System
Huang Qiuhua
(College of Physics Science and Information Engineering, Jishou University, Jishou,Hunan 416000)
Abstract
The design introduces a way of an intelligent light control system design. .Detailed description of the system control program, hardware selection and microcontroller programming.The system consists of vehicle detection circuit, the main controller, interrupt request for emergency access, light and digital display and other components.Based vehicles pass a long time and can also access two-lane no conflict of principle, the four sub-state program designed traffic access, the number of vehicles using piezoelectric sensors detected, the hardware and software for the existing traffic light control improvements that can dynamically adjustThe direction of the passage of time, greatly increased the traffic light with the timeliness and the Drive when the combination of flexibility.
Key Words: Piezoelectric sensors；Flow Rate of Vehicles detection；AT89S51；Digital display; Intelligent Control
目录
第一章 绪 论_____________ 1
第二章 系统设计方案_____________ 2
_ 2.1 系统设计控制要求_____________ 2
_ 2.2 系统方案分析与实现_____________ 3
第三章 系统总体组成结构_____________ 4
_ 3.1 系统总体描述及总体组成方框图_____________ 4
_ 3.2 单片机概述_____________ 4
_ 3.3 传感器选择_____________ 8
___ 3.3.1 压电晶片的连接方式_____________ 8
___ 3.3.2 压电式传感器的测量电路_____________ 8
__ 3.3.3 电压放大器（阻抗变换器）_____________ 9
_ 3.4 LED数码管的结构与原理_____________ 9
第四章 系统硬件设计_____________ 11
_ 4.1 智能交通灯控制系统总电路原理图_____________ 11
_ 4.2 交通灯的主体部分电路设计原理_____________ 12
_ 4.3 车辆检测电路原理及实现_____________ 12