毕业设计（论文）
外文文献翻译
文献、资料中文题目：基于PLC的交通灯控制系统设计文献、资料英文题目：PLC-based design of traffic lights 文献、资料来源：
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翻译日期： 2017.02.14
毕业设计（外文翻译）
英文题目 PLC-based design of traffic lights
中文题目基于PLC的交通灯设计
PLC-based design of traffic lights Abstract: One kind of traffic light control system using programmable logic controller (PLC), via software control traffic lights run automatically. In the system, the original line is the program instead of the relay, programmable logic controller (PLC) system hardware and software resources to be fair use. Normal operation and emergency transport for a detailed description and from the East and West emergencies can be mutually linked. Traffic signal systems and two seven-segment digital display in the countdown order; also discussed in detail the wiring of the hardware and PLC ladder. Traffic lights at the crossroads of the remote monitoring system design configuration software MCGS, real-time monitoring of traffic lights, greatly improving the reliability of data transmission. At the same time, we can configure the traffic lights to change the status of photographs.
Keywords: switching power,supply protection, circuit system design
1. Introduction
With the social development and progress, traffic flow becomes increasingly important. On the one hand, too many crossroads, more and more vehicles, which are causing serious traffic congestion. On the other hand, in the limited time it is necessary to maintain the vehicle and pedestrian fast and safe. Therefore, one kind of traffic light control system design, can be used to display time countdown, with computer controlled real-time data. In addition, the configuration technology for real-time images that reflect the traffic lights, understand the historical crossroads of work to get traffic lights visualization. The system consists of host computer and a low computer. MCGS configuration is installed in the host computer is lower by the PLC control system.
Normal traffic signal timing diagram shown in Figure 1. But there are some urgent matters, for example. There are a number of ambulances to transport patients to the hospital or to deal with a number of fire engines and fire. Fire engines and ambulances rushed to take precedence over other traffic scene. According to urban traffic control system, under normal circumstances, two control methods and urgency traffic control factors into account. This process can show 14 segment encoder. U.S. traffic lights instant record of the monitoring process.
Emergency control signals to control traffic emergency switch. If there is no emergency lights all work, but when an emergency open. In this case, the car is urgent priority pass. Once the emergency vehicle passes, emergency switch off immediately. The green light in the same direction of the vehicle quickly flashes three times, followed by the normal operation. If you were from the north-south and east-west two emergency vehicles, traffic control systems can respond quickly came early, and then another.
2. Traffic Control System Design
A. Hardware design
CP1H series PLC as controller, display the procedure should stop when the time series of abnormal system operation, the time will not be displayed. When the emergency procedures are completed time series, countdown display program should be reset. At 220 V AC system is used to control traffic lights, 24 V DC control segment encoder, Figure 2 shows the scheme Eastern time display. CP1H series programmable logic controller (PLC) is a simple controller, which consists of 24 inputs and sixteen outputs. Because the output to twenty In this system, an I / O
module must be extended. Circuit is shown in Figure 2.
B. Control Program Design
Six timers and two special normal open pulse is used in this system, the green light flashes for all north-south and east-timer and a special pulse; eight kinds of
interlocking internal relay is used to implement the urgency and transmit pulse two directions to PLC, shown in the figure. Two SDEC instructions are used to display the countdown display the corresponding light. As an important part of the countdown display program, east and west of the green light reflected in the view 4 in these programs downloaded to the programmable logic controller (PLC), all the traffic lights running accuracy, urgency, and things can be interlocked from north to south strictly, all the lights can be set back to the urgency of passing state. Therefore, these control program is correct, simple.
C. Monitoring System
Computer system has two main functions: an output signal acquisition and display real-time status of the programmable logic controller (PLC) to control traffic lights, traffic lights. Another notification robot status and history of the state real-time curve by examining the history and alarm window.
This monitoring system design and configuration software MCGS configuration is easy. The serial communication is implemented as follows.
Data inspection methods: double ended
Serial Communications Number: COM0 ended
The minimum sampling period: 200 ms
Programmable Logic Controller (PLC) The parameters are defined as follows: The minimum sampling period of the basic properties: 200 ms
Three read / write channel: X0, X1, X2
Six read-only access (read U.S. traffic lights): Q0-Q5
All channels must be connected to a variable defined in a real-time database access visits and other parameters to their default values. After a successful relationship, PLC and computer control system is able to change the color of the analog signal lights in the picture on the PC being collected data through the serial port.. In contrast, by changing the parameters of the host, the corresponding value is written to the PLC internal relay control, intersection traffic lights can be implemented. Experimental results show that the system is usually good enough and animation. Online monitoring system of traffic lights in Figure 5:
3. Conclusion
Experimental results show that the system is usually configured with enough good photos. This system simplifies the programmable logic controller (PLC) and the communication between the host computer using industrial configuration software development time is greatly reduced. In particular, more suitable for complex control
systems. We can control the traffic lights by the PLC and MCGS configuration, replace the original relay control, improve the system's lifetime. At the same time, this method can be applied to control the motor and fluid levels. Remote control and configuration combined with the simulation, can be applied to similar control zone. 4. References
[1] Whitworth, Duller, Jones D I. Aerial video inspection of overhead power lines [J].Power
Engineering Journal,2001,15:25-32.
[2] Jan Axelson, Lakeview Research-Serial port complete [D]. USA:1999:91-135.
基于PLC的交通灯控制系统设计
摘要
一种交通灯控制系统采用可编程序控制器(PLC), 通过软件控制交通灯自动运行。在系统原有的继电器线路被程序代替，可编程序控制器(PLC)系统的硬件和软件资源的被合理使用。正常运行和紧急运输进行了详细的介绍，并从突发事件的东西南北可以相互连锁。交通灯信号系统和两个数码管显示在倒计时秩序; 同时详细的论述布线的硬件和PLC的梯形图。在十字路口的交通信号灯远程监控系统设计了组态软MCGS，实时监控红绿灯，大大提高了数据传输的可靠性。与此同时，我们可以通过合理配置改变交通信号灯的状况。
关键词：PLC，交通信号灯，SDEC，配置软件，MCGS组态
一、引言
随着社会的发展和进步,交通畅通变得越来越重要。一方面,太多的十字路口,车辆越来越多，这些都造成严重的交通堵塞。另一方面，在有限的时间有必要保持车载和行人快速和安全。因此，一种交通灯控制系统的设计, 可以用来显示时间的倒计时, 与电脑联网控制实时数据。此外,配置技术应用于实时图像反映的交通信号灯、了解历史工作的十字路口，获得交通信号灯的可视化。该系统由计算机主机和较低的电脑。MCGS组态被安装于主机、较低的电脑是由PLC控制系统。
时序图正常交通信号灯显示图1，但也有一些紧急的事情。例如有一些救护车用来运送病人医院或一些消防车用来对付大火。消防车和救护车优先于其他的交通赶到出事地点，根据城市交通控制系统，正常情况下两种控制方法交通控制和紧迫性因素考虑在内。这个过程可以显示了14段编码器，美国的交通信号灯的即时照片记录了监控过程。
紧急控制信号是控制交通紧急开关如果没有紧急事件所有的红绿灯正常工作，只是紧急事件发生的时候打开。在这种情况下,紧急的车是优先通过。一旦紧急车辆经过,应急开关立即关掉。那绿色的光在同一方向的车辆迅速闪三次，随后正常运行。如果从南北和东西分别有两个紧急车，交通控制系统只能迅速反应来得早的，然后另一个。
二、交通控制系统的设计
A.硬件电路设计
CP1H系列的PLC作为控制器,，显示的程序应该停止的时候，时间序列异常系统工作，时间不会被显示。当紧急程序完成了时间序列、倒计时显示的程序应该被重置。在220 V交流系统是用来控制交通信号灯，24 V直流控制七段编码器，图2显示了方案东西方时间显示。CP1H系列可编程序控制器(PLC)的一个简单的控制器，它由24输入和16个输出。因为需要二十输出在这个系统中,一个I / O模块必须被扩展。线路图如图2：