下载后可任意编辑基于 PLC 专家控制系统的十字路口红绿灯控制设计摘要在当今高速进展的社会里，交通问题成为大家关注的社会问题，而目前国内十字路口的交通灯控制一般是定时切换控制的，汽车数量的直线上升及现有的定时切换控制方式的局限性都使得我们有必要寻求一种智能的交通控制系统。基于此本论文主要思路是：利用探测器（即电磁感应线圈）探测出车辆的流量后，通过可编程控制器 PLC来实现自动调节红绿灯的时长。关键词：PLC 控制；交通灯；探测车流量；专家控制系统AbstractIn the high speed development of society ， the traffic problem becomes the social problem that everybody pays attention to ，but at present our country traffic lights control generally is timing. And that the quantities of cars increase straightly and the timing control of the traffic lights have some bugs make us have necessity to look for a kind of intellective transportation control system。According to that, the way of thinking of this thesis is that：the time of the traffic lights are automatically computed by PLC after the locators(namely electromagnetic induction coil)have explored the discharge of the vehicle。Key words: the Control of PLC；Traffic lights；Number cars；the expert control systemI下载后可任意编辑目 录中英文摘要............................................（I）1 引言................................................（1）2 交通灯控制系统方案论证..............................（1）3 用 PLC 实现交通灯控制系统.............................（3）3．1 PLC 的选型...............................................................................（3）3．2 系统 I/O 分配和接线图...........................................................（4）3．2．1 I/O 分配表..............................................................................（4）3．2．2 I/O 接线图..............................................................................（5）3．3 传感器探测车辆...............................................
