天津工业大学2010届高职生毕业论文摘要目前国内十字路口的交通灯控制一般是定时切换控制的。在当今高速发展的社会里，交通问题成为大家关注的社会问题，汽车数量的直线上升及现有的定时切换控制交通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，基于此本论文的思路是:通过探测器(即电磁感应线圈)探测出汽车的流量后自动调节红绿灯的时长。车辆的流量记数、交通灯的时长控制可由可编程控制器(PLC)来实现。关键词：智能交通，探测，车流量，可编程控制器天津工业大学2010届高职生毕业论文AbstractAtpresent,ourcountrytrafficlightscontrolgenerallyistiming.Innowhighspeeddevelopofsociety,thetrafficproblembecomesthesocialproblemthateverybodypayattentionto,thecarquantityrunshighstraightlyandthetimingcontrolofthetrafficlightsexistthebugtoallmakethatushavenecessitytolookforakindofintellectivetransportationcontrolsystem.Accordingtothewayofthinkingofthisthesisis:thehoursofthetrafficlightsareautomaticallyregulatedafterthelocators(namelyelectromagneticinductioncoil)haveexploredadischargeofthevehicle.ThedischargeofthevehiclerecordsthenumberandthelongcontrolinhourofthetrafficlightcanbecomebyPLCtorealize.Keywordsintelligencetraffic，Detection，Numbercars，PLC天津工业大学2010届高职生毕业论文目录引言................................................................1第一章PLC基础知识简介............................................21.1PLC的构成.......................................................21.2I/O模块.........................................................21.3电源模块.........................................................21.4PLC系统的其它设备...............................................3第二章题目分析编程方案...........................................42.1题目可行性分析...................................................42.2车辆的存在与通过的检测...........................................42.2.1感应线圈(电感式传感器).........................................42.2.2电路...........................................................52.2.3硬件配置.......................................................62.2.4车辆计数......................................................122.3用PLC实现智能交通灯控制........................................122.3.1控制系统的组成................................................122.3.2车流量的计量..................................................13第三章智能交通系统PLC编程......................................143.1十字路口交通信号灯控制系统的控制要求............................143.2控制系统的控制要求..............................................143.2.1正常循环运行..................................................153.2.2急车强通控制..................................................173.3十字路口交通信号灯控制系统的PLC选型............................183.3.1控制系统的构成图.............................................183.3.2十字路口交通信号灯控制系统的资源分配..........................18天津工业大学2010届高职生毕业论文3.4程序时序图.......................................................22第四章程序编程和调试............................................234.1编程软件简介....................................................234.1.1画面构成及各部名称............................................234.1.2PLC程序调试.................................................234.2程序调试........................................................26第五章结论........................................................27附录...........
