plc彩灯闪烁控制系统rmaab.doc

PAGE 基于PLC的彩灯闪烁设计 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 social market economy continues to prosper and develop all kinds of decorative lights, advertising lights more Appeared in the city. In a large party scene, lantern is to become an indispensable landscape . Mostly small lantern made of neon tubes using a wide variety of colors and a variety of lamps , or to fluorescent, incandescent as the light source , comes with a large advertisement, posters to achieve the desired effect . These light control equipment , mostly digital circuits. In modern life, the outline of a large building or a large party of decorative lighting sets, due to its changing, power, digital circuits are not competent . PLC status quo is increasingly widely used , the paper describes the application of PLC in different types of change control of lights , bright lights , flashing the time and direction of flow control are required to achieve control by PLC. In applications where lights , decorative lights , advertising lights , lights change scenery varied, but in its mode of operation can be divided into three main types : long light , light and variable water slide . Long light feature is to work as long as the lights , turn on the load that is long-term , generally used in lanterns lighting or backdrop background , no frequent dynamic switching process , and therefore can be used to control the switch directly , with