摘  要

随着交通运输系统的压力越来越大，提高运输系统效率已成为一个热门话题。目前，指示灯控制交通通行系统多以十字路口的设计和研究为主，而五岔交叉路口也多以十字路口外加一条支路为研究设计对象。纯五岔路口的指示灯控制交通通行系统研究几乎为空白。

本设计从控制系统设计上，应用可编程控制器PLC和检测系统设计出五岔路口的智能交通灯控制系统以弥补我国没有关于纯五岔路口的指示灯控制交通通行的系统研究设计，并减少路口处交通拥堵滞流现象和绿色交通指示信号灯的剩余时间溢出空道占时现象，有效的缓解交通拥堵、实现交通管理系统提供最优控制。在路口相应的位置预埋传感线圈，对此路段上的车流量进行统计，并根据车流量的变化，改变绿灯的控制时间，可以实时地对绿灯资源进行合理调配，提高相应路口的通行能力。

关键词:可编程控制器；交通控制；五岔路口；智能

Abstract

With the improvement of living standards, the number of cars is also increasing, and the traffic congestion is getting worse. According to the current situation of urban traffic congestion in China, most of the traffic lights in our country are controlled by analog signals, but such controls Gradually unable to adapt to the increasingly busy traffic. This design from the control system design, the application of programmable logic controller PLC and test system design intelligent traffic light control system to solve the traffic congestion problem. The sensor coils are pre-embedded at the corresponding positions of the crossroads, and statistics are made on the traffic volume of the road segments, and the control time of the green light is changed according to the change of the traffic flow, and the green light resources can be rationally allocated in real time to improve the traffic of the corresponding intersections. ability.

Programmable controllers (PLCs) are characterized by high reliability, strong anti-interference ability, rich I/O interface modules, good flexibility, easy programming, easy system installation, easy maintenance, and strong versatility. These advantages make PLC very suitable for automatic control of traffic. The designer is an example of using a programmable controller to control six intersection traffic lights to illustrate the application of programmable controllers in traffic control. Programmable controllers are also used in traffic

Keywords： Programmable Logic Controller; traffic control ;intelligence

目  录

引  言

第一章 交通信号灯控制方案

1.1 交通路口及红绿灯的安排

1.2 交通指挥信号灯控制要求分析

1.2.1指示灯控制交通通行的系统方案设计

1.2.2指示灯控制交通通行的系统方案的选择

1.3指示灯控制交通通行的系统硬件选择

第二章 检测系统的选择与设计

2.1车辆检测系统的选择

2.2车辆检测系统的设计

2.3红灯绿灯检测装置

2.4电感式传感器线圈的布置

第三章 交通信号灯PLC控制系统分析与设计

3.1 PLC选型及I/O地址定义

3.2 PLC控制系统顺序功能图的设计

第四章 PLC控制系统梯形图的设计编程

4.1 基于STEP 7MicroWIN SP4的PLC控制系统梯形图的设计

总 结

参考文献

附  录

谢  辞