声光控制开关论文概要

课程设计

题目声光控制延时开关

学生姓名祝超学号 ********** 所在学院陕西理工学院

专业班级电子信息科学与技术专业1301班

指导教师宋卫星 __ ____ 完成地点陕西理工学院

2015年 10 月 12日

声光控制延时开关

作者：祝超

（陕理工物理与电信工程学院电子信息科学与技术专业1301班，陕西汉中723000）

指导教师：宋卫星

【摘要】声光控制开关是一种当环境亮度高时，有声响灯也不亮，当环境亮度低时，利用人的脚步声、说话声、击掌声等声音作用使灯点亮，亮灯一定时间后能自动熄灯的自动控制照明开关。它一般采用集成电路，其基础原理是当白天的环境亮度高时，经光敏电阻的作用，电路被封锁，声音不能触发电路工作，灯泡不亮。晚上或环境亮度低时，光敏电阻阻值呈相反状态，当有声音时，声音信号由压电陶瓷片拾取，经声电转换成微弱的电信号，该信号经放大后送处理器处理，处理器将幅度、频率不尽相同的若干声波信号转换成一次状态改变的控制信号，延时后经执行机构直接控制开关，电路工作，灯泡点亮，亮灯一定间后（可根据需要设定）自动熄灭。在实际工程应用中，要注意选择灵敏度适宜，电路元件质量好的开关。有的开关灵敏度低或器件质量存在问题，必须大喊一声，或使劲跺脚、拍手，才能使灯亮起来，嗓声大，对环境影响大，不受欢迎。此外，还要注意维护，有的开关因环境光接收口被灰尘、小广告覆盖，无声响时，白天灯也自动点亮，或某个元件故障，导致晚间灯不亮，或即亮即灭等现象，影响使用

【关键词】传感器；光敏传感器；麦克风；导通；截止

Sound and light control switch lights

Zhuchao

（Grade2013,Class1,Major Electronic Information Science and Technology,Physics Dept.,Shaanxi

University of Technology,Hanzhong 723000,Shaanxi）

Tutor:SongWeiXing

Abstract:Sound and light control switch is a kind of brightness when the environment is high, there is sound lights do not shine, when the environmental brightness is low, the use of people's footsteps, voices, applause and other sound

effects hit so that lamp lit, lighting a certain time can automatically turn off the lights after the automatic control

of lighting switches. It is commonly used integrated circuits, based on principle is that when the ambient light is

high during the day, after the role of photosensitive resistor, the circuit is blocked, the sound does not trigger the

circuit, light bulb does not shine. At night or environmental brightness is low, the photosensitive resistor was

the opposite state, when there are sound, the sound signals picked up by the piezoelectric ceramics by

acoustic-electric converted into weak electrical signals, the signal after amplification evacuation processor,

handling device will be amplitude, frequency, a number of different acoustic signals into a state change of the

control signal, time delay after the direct control by the executive body switches, circuit work, light bulbs,

lighting upon certain rooms (can be set as required) automatically switch off. In practical engineering

applications, the sensitivity should be selected from suitable, good quality components, the circuit switch. Some

switches or low sensitivity device quality problems must be shouted, or energetically stomping, clapping, can

lights up, throat and loud voices on the environmental impact of large, unpopular. In addition, we must pay

attention to maintain, and some switch I have been receiving due to ambient light dust, small advertising

coverage, no sound when the lights are automatically lit during the day, or a component failure,resulting in

night light does not shine, or the bright Jimie and otherphenomena affect the use.

Key words: transducer;Light sensors ;mircphone;light dependent resistor breakover;cutoff