十字路口交通灯控制系统设计

本科毕业设计

论文题目十字路口交通灯控制系统设计

学院工学院

专业农业电气化与自动化

毕业届别2011届

姓名李小龙

指导教师杨米

职称讲师

北京农业大学教务处制

二O一一年六月

目录

摘要 (2)

关键词 (2)

1.绪论 (5)

2.交通灯通行的方案设计及确定 (5)

2.1十字路口交通灯控制系统示意图 (5)

2.2设计方案一 (6)

2.2.1方案一系统流程图 (6)

2.3设计方案二 (6)

2.3.1方案二系统流程图 (6)

2.4方案比较及确定 (7)

3.系统硬件的设计 (8)

3.1硬件设计步骤 (8)

3.2PLC的选型 (8)

3.2.1PLC的分类 (8)

3.2.2输入输出点的估算 (9)

3.2.3主机型号的选择 (9)

3.2.4扩展模块的选择 (9)

3.2.5I/O端口分配 (10)

3.3硬件设计框图 (11)

3.4接线图 (11)

4.软件设计 (12)

4.1交通灯控制系统流程图 (12)

4.2软件梯形图 (13)

5.系统调试 (20)

5.1硬件系统调试 (20)

5.2软件系统调试 (21)

5.2.1 仿真调试图 (21)

6.总结 (23)

7.参考文献 (24)

8.附录：梯形图所对应的语句表 (25)

9.致谢 (29)

十字路口交通灯控制系统设计

李小龙

（北京农业大学工学院农电班 07级）

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,尤其是交通拥挤，交通事故等，更是与人们的生活息息相关，影响着人们的生活。在发展中国家，交通问题更加突出，如中国的北京、上海、南京等大城市，每天都有将近一两个小时的堵车，给人们带来的经济损失更是没法计算，这些主要是因为发展中国家政府官员，及交通管理部门在规划道路时，没有充分考虑城市的发展现状、发展速度，及所对应的交通客流量的增长速度，为此，各城市都承担了一定的经济损失。为此，进行了深刻的研讨，本文就城乡交通灯控制系统的电路原理、设计盘算和试验调试等问题来进行具体剖析讨论.

实现城市交通的合理分配及有效控制，可以用尺度逻辑器件、可编程序控制器PLC、单片机等计划来实现.其中用尺度逻辑器件来实现电路在很大水平上要受到逻辑器件如门电路等的影响,调试工作极为不易,单片机应用来进行系统的设计开发也不是很容易,因此,最后选择了用可编程的控制器PLC来实现系统功效的设计。

关键字:PLC 交通灯程序报告设计

Intersection traffic light control system design

LiXiaoLong

(BeiJing agricultural university tech level upgrade class 07

Abstract:with the development of social economy, urban traffic problems and cause the attention of people, especially the traffic congestion, traffic accidents, etc, but also with people's life, affecting people's life. In developing countries, more outstanding traffic problems, such as Beijing, Shanghai, nanjing and other big cities, every day there are nearly

an hour or two people brings up traffic, the economic loss but also can't calculation, these mainly because governments of developing countries to officials, and transportation management department in planning road, no full consideration of city development present situation, development speed, and the corresponding traffic volume growth rates, therefore, each city carries a certain economic loss. Therefore, made a profound discussion, this paper the urban traffic control system of circuit principle, design calculation and test commissioning to discuss specific problem analysis.

Realizing urban traffic distribution and effective control, can use dimension logic devices, programmable controller PLC and single-chip microcomputer etc. These plans to achieve with scale logic device to achieve circuit in large level by logic devices such as a gate to the effect of, commissioning work extremely easily, microcomputer application for system design development also is not very easy, therefore, finally chose to use programmable controller PLC to realize the design of system function.

Key word:PLC traffic lights program report design