摘要PLC可编程序制控器是一种把很微小的处理器当做基本，该处理器结合了计算机、自动控制以及通信技术三种技术结合而成的一种新型的工业控制系统。它具有简单的结构、便于编程、稳定性能高、简单且便于操作等优点，已景广泛的应用于各个工业生产过程和位置的自控制中。因此，该控制器便成为了现在自动化工厂中使用的最为广泛的一种设备。大部分工程技术人员认为，可编程制控器将来必然能够变成工业生产中工业控制的最重要的基础设备之一和最重要的手段，因此，PLC、CAD/CAN、机器人将成为工业产业的三大支柱。46000
文本简要的介绍了PLC的使用特点以及功能，同时还结合了天然气输送自控系统中PLC应用的实际情况，对天燃气输送控自系统中单片机的应用情况进行了系统的分析和研究。天然气调压站是一个城市的供气纽枢，因此天然气调压站控制系统的工作效率及工作稳定性必然接直决定调压站的供气质量。只有使用能够拥有自动控制系统的天然气调压站，才能够管理好天然气用气量的控制工作。这篇文章详细的描述了天然气调压站的自控系统的运作方法，并且讨论了PLC在天然气调压站自控系统中的使用运行方式。
毕业论文关键词：天然气输送；调压站；自动控系统；PLC
ABSTRACT
PLC programmable controller is a microprocessor based, integrated computer technology, automatic control technology and communication technology, the technology development and a new type of industrial control devices. It has simple structure, easy programming, high reliability, easy to operate, and other advantages, has been widely used in industrial process and the location of the automatic control. According to statistics, programming controller is industrial automation device used the most in a device. Experts say, programming controller will become one of the main means for the industrial control in the future and important basic equipment, PLC, robotics, CAD / CAM will be the three pillars of industrial production . because of the PLC with the use of the characteristics of strong adaptability to the environment, and its internal timer is very rich in resources, to currently in widespread use of "progressive" signal for precise control, especially the control of multiple fork in the road can be very convenient to realize. So now more and more the application of PLC in the traffic light system. At the same time, the PLC itself also has network communication function, can be on the road with a signal lamp composed of a LAN unified dispatching management, can reduce the waiting time of vehicles, scientific management. In the design is introduced F940 touch screen to simulate the traffic lights at a crossroads flash Light and vehicle traffic, the very image of the PLC in the traffic light system to show the practical application ability.
   demand, good natural gas regulator station with volume control, the automatic control system has become the inevitable choice for the development of gas pressure regulating station. This paper briefly introduces the natural gas pressure regulating station For the principle, then emphatically discusses the application of PLC in the design of automatic control system in gas station.
Key words:Natural gas transportation; station; automatic control system; PLC
目    录
第一章    绪论    1
1.1 本课题的选题背景与设计意义    1
1.1.1 选题背景    1
1.1.2 设计意义    2
1.2 PLC站控系统的运作现状    3
第二章    本课题的设计及其实现方案    4
2.1 课题概述    4
2.2 设计方案    4
2.3 文本框架及任务    5 PLC在天然气释放自控装置中对管道泵的控制+梯形图:http://www.youerw.com/zidonghua/lunwen_47757.html