摘 要
随着社会经济的发展，城市交通问题越来越引起人们的关注，我国许多大中城市的交通压力都非常大。所以，改善与提高现有的交通系统的工作效率，加强交通路口的信号灯控制和监控是非常重要的。
解决好交通信号灯控制问题将是保障交通有序、安全、快速运行的重要环节。但现有的交通信号灯控制系统都是单一的固定时序控制, 不能够根据实际交通状况进行调节控制。 本文主要使用PLC和地感线圈来实现智能交通控制。在十字路口相应的位置埋设地感线圈，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，提高十字路口的通行能力，缓解交通拥挤，台风实时监控系统达到最优控制。文中详细介绍了系统的硬件设计和软件设计，最后用iFIX工程组态软件进行监控，达到了比较满意的可视化效果，并实现了模拟真实环境的目的。
关键词i3dg 智能交通 地感线圈 车流量 延时控制
THE DESIGN OF INTELLIGENT TRAFFIC CONTROL SYSTEM BASED ON PLC
ABSTRACT
Along with the development of the society economy, the city transportation problem causes our concern more and more, 自动打蜡机and traffic pressure in many large and medium-sized cities in China is very great. Therefore, ahrpto improve and enhance efficiency of the existing transport system彩灯控制电路, strengthen the control of traffic lights and monitor the situation is very important.
The traffic light control is important for urban traffic safety and high efficiency. But all the traffic light control are working in standing sequence, and are unable to make adjustment with different traffic flow.
In the design of the paper, one method of the intelligent traffic control is used which combines the PLC and the induction coil. zigbee组网Induction coils are preburied at the correspond- ing crossroads to make statistics of the vehicle flow, according to which the control time o
f the green lights is changed, then, the resource of the green light is reasonably distributed to improve the traffic capacity at the crossroads. PLC could self regulate the time of traffic light, and reach the best of control. The hardware and software of the system are introduced in the paper in detail. Finally, using iFIX software for monitoring, the visualization effect and the simulation of the real environment is satisfactory.
KEY WORDS intelligent traffic induction coil vehicle flowrate time-delay control
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