毕业设计（论文）-基于PLC的霓虹灯控制设计.doc

基于PLC的霓虹灯控制设计
作者姓名:
专业名称:电气工程及其自动化
指导教师:李四讲师
摘要
随着社会市场经济的不断繁荣和发展,各种装饰彩灯、广告彩灯越来越多地出现在城市中。在大型晚会的现场,彩灯更是成为不可缺少的一道景观。小型的彩灯多为采用霓虹灯管做成各种各样和多种色彩的灯管,或是以日光灯、白炽灯作为光源,另配大型广告语、宣传画来达到效果。这些灯的控制设备多为数字电路。而在现代生活中,大型楼宇的轮廓装饰或大型晚会的灯光布景,由于其变化多、功率大,数字电路则不能胜任。针对PLC日益得到广泛应用的现状,本文介绍PLC在不同变化类型的彩灯控制中的应用,灯的亮灭、闪烁时间及流动方向的控制均通过PLC来达到控制要求。在彩灯的应用中,装饰灯、广告灯、布景灯的变化多种多样,但就其工作模式,可分为三种主要类型:长明灯、流水灯及变幻灯。长明灯的特点是只要灯投入工作,负载即长期接通,一般在彩灯中用以照明或衬托底色,没有频繁的动态切换过程,因此可用开关直接控制,不需经过PLC控制。流水灯负载变化频率高,变换速度快,使人有眼花缭乱之感,分为多灯流动、单灯流动等情形。变幻灯则包括字形变化、色彩变化、位置变化等,其主要特点是在整个工作过程中周期性地花样变化,但频率不高。流水灯及变幻灯均适宜采用PLC控制。

关键词:PLC 循环控制
Abstract
With the continued prosperity and development of the social market economy, a variety of decorative lanterns, more and more advertising lantern in the city. Large party of the scene, the lantern is to e indispensable to a landscape. The small lights using neon tubes made ​​of a wide range and variety of colors of the lamp, fluorescent, incandescent light, comes with a large slogan, posters to achieve the desired effect. These lights control equipment for digital circuits. In modern life, lighting sets the outline decoration of large buildings or large party, change, power, digital circuits are petent. Increasingly widely used for PLC status quo This article describes the application of the PLC in the control of different types of changes lantern, light, bright off, flashing time and the flow direction control to meet the control requirements through the PLC. Variety of decorative lamps, advertising lights, backdrops, lights change in the lantern of the applications, but its mode of operation can be divided into three main types: long light, water, light and variable slide. The long light long as the lights work load that is, connected to long-term, generally used in the lantern in the lighting or set off background, and frequent dynamic switching process, and therefore available switches directly control without PLC control. Water light load change frequency transform faster, makes a dazzling