智能照明系统主控制器设计.docVIP

智能照明系统主控制器设计 摘 要 随着LED性能的不断改善和价格的不断降低，高亮度LED取代传统光源应用于通用照明是未来的法展趋势。设计了一套基于单片机（MCU）控制的LED智能照明系统，LED采用恒流驱动，PWM调光方式。其中光强度传感器使得LED能够根据环境需要自动调节自身亮度，声控开关方便操作。详细给出了各个部分的设计。实验表明，系统长时间运行稳定，高效节能，白光质量好，适用于公共场所通用照明。 关键词：高亮度LED PWM调光 智能照明 高效节能 Design of intelligent LED illumination system based on MCU controller ABSTRACT With the improvement of LED performance and the reduction of its price, it is a trend that high bright LED(HB LED) will be used in illumination are a instead of traditional light sources. In this paper, design of intelligent HB LED illumination system was proposed based on MCU controller, which adopted constant current drive and PWM dimming. The light sensor was intended to dim LED automatically according to the ambient light, while the .The design for each part was given in detail in this paper. The experimental results indicate that the illumination system works stably for a long time with the advantages of energy saving and good quality of white light. The system is suitable for public general illumination applications. Keywords: high brightness LED PWM dimming intelligent illumination energy saving Voice-activated switch for easy operation 目 录 前言 第1章 绪论 1.1 课题研究背景…………………………………………………………………2 1.2 课题研究的目的与意义………………………………………………………3 1.2.1 良好的节能效果…………………………………………………………3 1.2.2 改善工作环境与提高工作效率…………………………………………3 1.2.3 较好的投资收益效果……………………………………………………3 第2章 系统设计方案 2.1 单片机选择……………………………………………………………………3 2.2 光照检测方式…………………………………………………………………4 2.3 声控开关检测方式……………………………………………………………5 2.4 LED的调光控制………………………………………………………………5 2.4.1 PWM信号的原理和形成…………………………………………………6 2.4.2 PWM驱动白光LED………………………………………………………6 第3章 硬件电路设计与实现 3.1 系统硬件总述…………………………………………………………………7 3.2 单片机最小系统………………………………………………………………8 3.2.1 AT89C51引脚介绍………………………………………………………8 3.2.2 CPU时钟电路……………………………………………………………9 3.2.3 复位电路 ………………………………………………………………10 3.3 光信号取样电路设计 ………………………………………………………10 3.3.1 仪表放大器的结构及使用 ……………………………………………11 3.3.2 OP07的介绍及应用 ……………………………………………………12 3.3.3 TLC3545的介绍及应用…