毕业设计（论文）-智能LED照明控制电路的系统设计.doc

JIANGXI AGRICULTURAL UNIVERSITY
本科毕业论文(设计)

题目: 智能LED照明控制电路的系统设计

学院: 工学院
姓名: 程洋生
学号: 20062530
专业: 电子信息工程
年级: 06级
指导教师:赵进辉职称:讲师
二O一一年五月
摘要
LED被称为第四代照明光源或绿色光源,LED的发光器件是冷光源,具有节能、环保、寿命长、体积小等特点。LED光源照明在当代社会的应用必将会随着能源的紧缺,而得到广泛的应用,特别是智能LED光源照明。近几年MEMS(微机电系统)技术兴起又将传感器技术向小型化、智能化、多功能化、低成本化大踏步迈进。光敏传感器、红外传感器等各种类型的传感器都可与LED照明灯具组成一个智能控制系统,本文介绍了一套LED光源智能调光系统,用来解决照明浪费的问题,以节省电能。本系统主要由以下几个部分组成:控制部分、环境亮度传感器部分、A/D转换器部分, LED驱动电路及LED光源等部分。每个部分都从实际应用出发,给出了市场使用成本最低的器件。本文还给出了详细的系统硬件设计和软件流程图。另外,利用先进的PWM调光技术,通过STC单片机处理后产生PWM信号控制LED灯可根据环境亮度不同自动调节LED照明的开关和亮度。本系统具有提高用电效率,节约电能和缓解用电高峰电力供应压力的双重作用。
关键词:智能照明;LED;光敏二极管;节能;PWM;STC单片机
Abstract
LED light source is known as fourth generation or green light, LED light-emitting device is a cold light source, with energy saving, environmental protection, long life, small size and other illumination application in contemporary society will be with the energy shortage while widely used especially intelligent LED recent years, MEMS (microelectromechanical systems) technology, sensor technology, the rise in turn to small, intelligent, multi-functional, low cost of the great strides sensors, infrared sensors and other types of sensors can be formed with an intelligent LED lighting control system, this paper introduces a set of intelligent LED lighting dimming system, lighting is used to solve the waste problem, to save system mainly consists of the ponents: the control part of the ambient light sensor parts, A / D converter section, LED drive circuit and LED light source and other part from the practical application, given the market with the lowest cost article also gives a detailed hardware design and software flow addition, the use of advanced PWM dimming technology, produced by STC after microcontroller PWM signal to control the LED lights of different brightness can be adjusted automatically according to the ambient lighting switches and LED brig