摘要随着社会的进一步发展和资源的日益匮乏，人们对生活水平的要求也水涨船 高，调光灯的应用也越来越普遍，例如：家庭照明，生产照明，景观照明。人们 不仅需要充分的照明亮度保障，同时也要求它应该构筑一个令人舒适的感官环境， 减少光污染对人类的危害。在许多发达国家，智能调光系统已成为智能家居的一 个重要组成部分，且得到日益广泛的应用。80311

近年来,国内调光灯品种丰富，层次多样，既有模拟式、数字式、集成芯片 式调光灯，也还有小闭环、中闭环和大闭环调光灯控制系统，可以充分满足各种 领域的需要。目前，调光灯的发展趋势已经不仅仅是一个单独产品，而往往是一 套体系，比如经常把调光灯系统嵌入到智能家居领域。

因此，本文将介绍一种由单片机作为主控单元，来实现对 220V白炽灯的无 极调光的调光控制系统。本文设计的调光控制系统通过STC89C52 单片机作为主 控单元，配以对 220V交流电进行过零检测，引出中断信号，进而控制双向可控 硅的导通宽度来实现作为纯电阻性负载的白炽灯亮度的无极调整。本设计共计包 括五大模块：单片机及最小系统模块，220V交流电过零信号采集模块，光触发驱 动模块，双向可控硅主电路模块，按键控制模块。最后，本文基本能实现对灯光 的无极调整。

毕业论文关键词： 单片机；调光；过零检测；光耦隔离驱动；双向可控硅

Abstract With the increasing scarcity of resources and the further development of society, people's living standards requirements have gone up and LED lights dimming applications are becoming more common, such as: home lighting, production lighting, landscape lighting。People not only need to guarantee adequate illumination, it also requires that it should build a comforting sensory environment and reduce light pollution hazards to humans。In many developed countries, intelligent dimming systems have become an important part of the smart home, and increasingly widely used。Therefore, this paper will introduce a microcontroller as the main control unit, to achieve 220V LED lights dimming control system stepless dimming。

In recent years, dimming lights variety, perse levels, both analog, digital, integrated chip dimming lights, and there is a small closed-loop, closed-loop and closed-loop large dimming light control system, can fully meet It needs in the area。At present, the development trend of dimming the lamp is not just a single product, but often a system, such as dimming lights often embedded in the field of intelligent home systems。

Therefore, this article will introduce a microcontroller as the main control unit to achieve dimming control system for 220V incandescent Promise dimming。This design of dimming control system by STC89C52 microcontroller as the main control unit, together with the AC to 220V zero-crossing detection, leads to an interrupt signal, then control the triac conduction width to achieve brightness as incandescent purely resistive load the stepless adjustment。The design includes a total of five modules: Microcontroller and minimum system module, 220V AC zero-crossing signal acquisition module, optical drive trigger module triac main circuit module button control module。Finally, the article basically can achieve the light of the pole adjustment。

Keywords: SCM；Dimming；Zero-crossing detector；Optocoupler driver  ；Triac

目录

第一章 绪论 1

1。1 课题背景及意义 1

1。2 单片机调光灯发展现状 1

1。2。1 国内研究现状及进展 1

1。2。2 国外研究现状及进展