摘 要：智能声光控开关的工作原理是：在没有光信号或光信号很弱时，当出现声音信号并且强度适当的时候，照明灯能够自行工作，提供照明；而且照明灯会在点亮几十秒后自动熄灭。在有足够强度的光信号时，即使发出声信号，照明灯也不会亮，从而达到节能的目的。73158     

本文主要以STC89C51单片机为核心元件，研究智能声光控开关的设计。通过光信号采集电路和声信号判断电路实现对声、光信号的采集和处理来控制照明灯的点亮；并通过设计延时电路来确保照明灯在持续点亮几十秒后能够自动熄灭，从而达到节能的目的。为确保智能声光控开关的使用寿命，还要设计过零启动保护电路来对智能声光控开关进行保护。在设计好电路之后，运用Protues软件画出仿真电路图，再用Keil软件编写所需的C语言程序，将所编写好的C语言程序装载入仿真电路中进行仿真实验。对仿真电路进行调试，观察仿真结果是否达到设计的预设结果。

毕业论文关键词：智能，节能，声光控，可靠性

Abstract：Intelligent sound and light control switch works is: when there is no light or optical signals is weak, when there is an appropriate intensity acoustic signals when the light automatically lights providing illumination; and light automatically goes off in several tens of seconds after lighting。 When there is sufficient intensity of the optical signal, even if the audible signal lights are not bright, so as to achieve energy-saving purposes。

This paper mainly STC89C51 microcontroller core elements, sound and light control switch intelligent design。Optical signal and acoustic signal acquisition circuit judge circuit implementation of sound, light signal acquisition and processing to control lighting lights; and through the design of the delay circuit to ensure that lights continuously lit after tens of seconds can be automatically extinguished, so as to achieve energy-saving purposes。 To ensure the sound and light control switch intelligent life, but also designed a zero start-up protection circuit to protect intelligent sound and light control switch。 In a good circuit design after using Protues circuit simulation software to draw, then Keil software necessary for the preparation of C language program, which will write good C language program is loaded into the simulation circuit simulation experiments。 Circuit simulation debugging, observe the results of the simulation results has reached a preset design。

Keywords：Intelligent, energy saving, sound and light control, reliability

目   录

1 绪论4

1。1 课题背景…4

1。2 课题研究类容…4

1。3 课题的意义4

2 系统设计方案5

2。1 课题研究思路…5

2。2 技术方案选择…6 

2。3 STC89C51单片机的介绍…6

2。4 系统工作原理…8

3 硬件系统的设计…9

3。1 声信号采集电路的设计…9

3。2 光信号判断电路的设计…10

3。3 过零启动保护电路的设计11

3。4 定时电路的设计13

3。5 驱动电路的设计13

3。6 电源设计…14

4 软件系统的设计…15

4。1软件设计语言的选择15

4。2 程序流程图16

4。3 主程序17

4。4 延时程序设计…17

4。5 TLC2543读写程序设计…18

5 系统的调试…18

5。1 调试过程…18

5。2调试结果…。20

6 结论21

7 参考文献22

8 致谢23

9 附录24

1 绪论

1。1 课题背景