热释电红外传感器的防近看电视机顶盒的设计

Pyroelectric Infrared Sensor Prevent Nearly Television Set-top Box Designs

本课题提出了一种热释电红外传感器的防近看电视机顶盒的设计的解决方案,利用机顶盒正面内藏的热释红外感应头,感知人体与电视机的距离,当人体超过设定的安全距离(可以根据不同的需要设置不同的安全距离)时,机顶盒动作,延时一段时间切断电视信号,语音提示"请保护眼睛、距离过近、请后退"等;当人体保持安全距离后,电视机恢复正常播放;同时,为了防止小孩贪看电视以免影响其学习和休息,本课题还设计了定时的功能,并且显示时间,时间可调,若小孩在规定的时间内不关电视,延时一段时间电视机自动关机。经过多次测试,已能满足本次课题设计的要求。

This topic proposed one kind design solution which against watching the television set-top box based on the pyroelectric infrared sensor design solution, Making use of the Pyroelectric infrared sensor head which is contained in the positive of set-top box, percept the distance between person and the television, when the human body was not in the safe area which was set first（ can be set according to different needs of different safe distance）,the set-top box make reaction, cut off the signal of the television after delaying some time, and the voice prompt ＂ Please protect your eyes, you are so close to the TV, Please be far away＂ and so on; when the people is in the safe distance, the television resumes normal broadcast; Simultaneously, In order to prevent the child excessive to watch the television to affect their study and the rest, This topic has also designed the function fixed time .show the time ,and the time is adjustable, If the child does not turn off the television in the stipulation time ,It delays period of time, and the television turn off automatically, according to some tests, It has been able to satisfy this topic design of the request.