一款适用于多媒体教室窗帘自动控制电路  

A Curtain Automatic Control Circuit for Multimedia Classroom

作　　者：刘立权[1] LIU Li-quan(Shandong Agricultural University,Tai'an Shandong 271018)

机构地区：[1]山东农业大学,山东泰安271018

出　　处：《数字技术与应用》2020年第4期10-11,13,共3页Digital Technology & Application

摘　　要：多媒体教室自然光对屏幕的影响,制约教学内容的显示效果。本电路设计能够自动调节电动窗帘,使室内进光量保持在一个有限范围。通过室外光采集、比较电路、电机驱动电路等控制窗帘电机,线性带动窗帘遮合或拉开,保证进入光线强度在这个范围内,既满足多媒体显示设备亮度和对比度显示效果,又能保证室内光强符合视力健康标准,解决了目前多媒体教室屏幕显示效果深受室外光强弱影响问题。由于插入手控电路,还可以通过按键手动控制窗帘启闭,也可以通过接入物联网控制信号实现远程控制。The influence of natural light on the screen of multimedia classroom restricts the display effect of teaching content.The circuit design can automatically adjust the electric curtain,so as to keep the indoor light in a limited range.The curtain motor is controlled by outdoor light collection circuit,comparison circuit and motor drive circuit,which can drive the curtain to close or open linearly to ensure the light intensity within this range.It can not only meet the brightness and contrast display effect of multimedia display equipment,but also ensure that the indoor light intensity meets the vision health standard,which solves the problem that the screen display effect of multimedia classroom is deeply influenced by the outdoor light intensity Ring the question.As a result of inserting the manual control circuit,the curtain can also be opened and closed manually by pressing the key,or remote control can be realized by accessing the control signal of the Internet of things.

关 键 词：光电采集 电平门限 电机驱动 译码切换 

分 类 号：TP273.2[自动化与计算机技术—检测技术与自动化装置]