文档介绍：毕业设计[论文]
题目: 家用可调光LED照明系统设计
学院: 电气与信息工程学院
专业: 自动化
姓名:
指导老师:
完成时间:
摘要
作为一种光源,调光是很重要的。不仅是为了在家居中得到一个更舒适的环境,在今天来说,减少不必要的电光线,以进一步实现节能减排的目的是更加重要的一件事。而且对于LED光源来说,调光也是比其他荧光灯、节能灯、高压钠灯等更容易实现,所以更应该在各种类型的LED灯具中加上调光的功能。
该系统硬件电路由四个部分组成:感光电路、AD转换电路、单片机控制电路、发光二极管驱动电路。可实现自动和手动两种控制方式。软件部分采用PID算法,自动调节环境光照度。本设计以89C52单片机为控制器,利用光敏电阻采集环境光照度,采用脉宽调制方式调节三极管,进而调节LED的发光亮度,最终维持环境光照度在一个设定的水平。
关键词:发光二极管,PID算法,照明,节能
Abstract
The quality of dimming of light source is very important. It is not only for a better environment at home. At present, it is also an even more important issue to lessen waste of unnecessary electric light and further achieve the goal of energy saving and emission reduction. What’s more, for light source of LED, it is easier to adjust brightness than fluorescent lamp, energy saving lamp, high pressure sodium lamp and other kinds of lamps. Therefore, we’d better add the function of brightness-adjusting to various kinds of LED lamps.
The hardware of adaptive adjustable optical-intensity system is consisted of four parts. They are photosensitive circuit, AD change-over circuit, single-chip puter control circuit, and LED driving circuit. And the software of the system makes use of PID algorithm to adjust brightness of environment automatically. This design takes 89C52 SCM as controller, use photo conductive resistance to collect luminance of the environment. And the designer adopt pulse width modulation mode to adjust triode, which can help adjust brightness of LED to keep intensity of illumination of the environment at a set level.
Keywords: LED,PID,illumination,Energy Saving
目录
摘要 I
Abstract II
第1章绪论 1
1
1
3
LED的国内外研究现状 3
3
LED相关知识 4
LED的结构及发光原理 4
LED光源的特点 4
LED的应用 5
第2章系统设计原理 7
7
8
8
8
LED驱动设计注意点 9
第3章硬件设计 10
10
11
13
13
13
AT89C51简介 14
ADC0832简介 15
3.