(完整版)十字路口交通灯PLC控制系统设计与调试毕业论文设计

to curb the occurrence of traffic accidents and at the same time to reduce vehicle emissions, thus reducing environmental pollution Have played a role should not be underestimated.

Analysis of the modern urban traffic control and management of the status quo, combined with the actual situation of urban and rural transport on the traffic light control system working principle, given a simple and practical urban traffic light control system .

【Key words】: traffic control traffic lights PLC control

目 录

绪 论 ..................................................................................................................................................... 1 第一章 PLC的介绍 .......................................................................................................................... 2

1.1 PLC的基本知识 .................................................................................................................... 2

1.1.1 PLC产生和定义 .......................................................................................................... 2 1.1.2 PLC的基本组成 .......................................................................................................... 2 1.1.3 PLC的基本工作原理 .................................................................................................. 3 1.1.4 PLC的特点 .................................................................................................................. 3 1.2 PLC的应用与前景 ................................................................................................................. 3 第二章 十字路口交通灯的介绍 ........................................................................................................... 4

2.1 十字路口交通灯的原理 .......................................................................................................... 4

2.1.1 十字路口交通灯的原理及示意图 ............................................................................. 4 2.2 电路中主要元器件的介绍 ...................................................................................................... 5

2.2.1 熔断器 ......................................................................................................................... 5 2.2.2 中间继电器 ................................................................................................................. 5

第三章 应用PLC设计十字路口交通灯 ......................................................................................... 6

3.1 输入输出点分配表 .................................................................................................................. 6 3.2 十字路口交通灯的接线图 ..................................................................................................... 6

3.2.1 PLC控制系统IO接线图 .......................................................................................... 6 3.2.2 十字路口交通灯的接线图 ......................................................................................... 7 3.2.3 十字路口交通灯的实际接线图 ................................................................................. 8 3.3 十字路口交通灯的控制时序图 ............................................................................................. 9 3.4 十字路口交通灯的程序设计 ............................................................................................... 10 第四章 十字路口交通的程序调试 ..................................................................................................... 12

4.1 编程思想 ............................................................................................................................... 12 4.2 控制系统的程序调试步骤 ................................................................................................... 12 4.3 调试过程遇到的问题及解决方法 ....................................................................................... 12 结 论 ................................................................................................................................................. 13 致 谢 ................................................................................................................................................... 14 参考文献 ................................................................................................................................................. 15