基于单片机的LED照明系统设计

论文总字数：15305字

摘 要

在国家大力倡导清洁能源和新能源的背景下，电能的潜力将再一次被激发。而自白炽灯发明以来，照明也早已离不开人们的日常生活。半导体LED照明具有高效、节能、环保、易控制、易维护等优势，是实现节能减排的有效途径，也必然是照明未来发展的趋势。但是LED照明需要低压、直流驱动，这也就导致它不能由电网直接供电，所以LED照明的驱动电源成了关键。而随着微型计算机技术的发展，使得对LED照明的智能控制成为了可能。本设计将从智能控制这个方向入手，将外部光照强度列为LED照明的控制因素，使用PWM调光技术，基于C51系列单片机设计一套智能控制系统。最后，完成了LED照明系统的整体调试工作。经调试发现，电路工作正常，调光效果良好，整体系统工作稳定，并给出了相关实物图。

关键词：电能，LED照明，PWM，单片机，智能控制

Abstract：The potential of electric power will once again be stimulated in the context of strong national advocacy for clean energy and new energy.Since the invention of incandescent lamp, lighting has been inseparable from People"s Daily life.Semiconductor LED lighting has the advantages of high efficiency, energy saving, environmental protection, easy to control and easy to maintain. It is an effective way to realize energy conservation and emission reduction, and it must be the trend of future development of lighting.However, LED lighting needs low voltage and dc drive, which also causes it to be unable to be directly supplied by the power grid, so the driving power of LED lighting is the key. With the development of microcomputer technology, it is possible to control the intelligent control of LED lighting.This design will be from the direction of intelligent control, the external light intensity as a controlling factor of LED lighting, and using PWM dimming technology, based on C51 series single chip microcomputer to design a set of intelligent control system.Finally, the overall debugging of LED lighting system is completed. After debugging, the circuit work is normal, the dimming effect is good, the whole system is stable, and the related physical pictures are given.

Keywords: power, led lighting, pwm, mcu, intelligent control

目 录

1. 绪论........................................................... 3

1.1 课题研究背景及意义........................................... 3

1.2 研究现状..................................................... 3

1.3 研究内容..................................................... 4

1. LED及其控制技术概述............................................ 4

2.1 LED发光原理.................................................. 4

2.2 LED相关特性.................................................. 5

2.3 调光技术..................................................... 5

1. LED照明系统的总体设计.......................................... 6

3.1 设计需求分析................................................. 6

3.2 系统总体结构................................................. 7

1. LED照明系统的硬件设计.......................................... 7

4.1 单片机控制系统电路设计....................................... 7

4.2 光照检测模块设计............................................. 9

4.3 LED负载电路设计............................................. 10

4.4 按键、指示灯电路设计........................................ 12

4.5 电源电路设计................................................ 13

1. LED照明系统的软件设计......................................... 14

5.1 程序总体构架设计............................................ 14

5.2 程序功能设计................................................ 15

1. 系统测试...................................................... 21

6.1 硬件测试.................................................... 21

6.2 软件测试.................................................... 21

6.3 实物测试.................................................... 22

总结与展望...................................................... 25

参考文献........................................................ 26

致谢............................................................ 27

1. 绪论
   1. 课题研究背景及意义

当下，节能减排已经成为全球共同关注的话题，而人工照明占全球用电需求的20%左右。由此可见，如果用在照明上的电能消耗能够得到有效降低的话，那么对于节能减排会有相当大的帮助。

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