基于PLC和变频器的花式喷泉的设计 毕业设计说明书(论文)_精品.doc

基于PLC和变频器的花式喷泉的设计 毕业设计说明书（论文）中文摘要 随着我国城市化进程的加快和人口的大量集聚，环境显得越来越重要。在日常生活中的一些公共场所，比如：广场、大厦、小区等等。我们可以看到各种各样的喷泉，有的是为了引人入目，有的是为了给生活或节日增添喜庆的气氛，而有的则成了企业的一种精神象征，同时喷泉还可以净化空气，减少尘埃，降低气温。喷泉的细小水珠同空气分子撞击，能产生大量的负氧离子，有益于改善环境和增进人们的身心健康。在炎热的夏日可以起到增湿和降温的作用：目前世界各国技术发展日新月异，不过很多都是以破坏环境为代价的，环境问题已经受到了党和国家以及全国人民的重视，保护环境，人人有责！ 花式喷泉是近年来出现的一种园林建筑与花式观赏相结合的一种产物。随着可编程控制器在我国的迅速发展，对花式喷泉的控制要求也越来越高，使得越来越多的控制部分需要可编程控制器来实现。毕业设计说明书（论文）外文摘要 Title Design Based on PLC and converters of the fancy fountain Abstract With the accelerated process of urbanization and the large concentration of population, The environment is becoming more and more important. In some public places in everyday life, such as in square, building, district, etc. We can see various fountain, some of them just want to catch people’s eye, and some want to enhance the atmosphere of daily life or festival, and others become a kind of the symbol of enterprise spirit. Meanwhile fountain can moisten the air, reduce dust and lowering temperature .The tiny water droplets collide with air molecules can produce a lot of negative oxygen ions. Fancy fountain can be seen everywhere. It can improve the environment and enhance peoples physical and mental health. During the hot summer it plays an important role in increasing the humidity and lowering temperature. In most countries, technology is advancing rapidly, but many are based on the cost of destroying the environment .Now the party, the state and the national people have paied great attention to the environment. Protection of the environment is everyones responsibility! Fancy fountain is the product of the combination between garden architectural and fancy ornamental. With the rapid development of programmable controller in China , the control requirements of fancy fountain is becoming more and more strict, so more and more control section should need programmable controller to achieve. Fancy fountain uses a programmable logic controller (PLC) and the frequency converter, using soft