基于人体感应的智能台灯设计

Design of Intelligent Table Lamp based on Human body Induction

随着传感器技术的发展和用户需求的不断提升,出于节能和护眼的考虑,市场上许多台灯具有亮度调节的功能,但大多通过手动调节的方式:旋钮调节或触摸调节。本文设计的智能台灯通过人体红外感应模块检测灯前有人,基于照度传感器采集的环境亮度,采用PWM无极调压方式自动调节LED灯亮度,达到适宜阅读写作的需求。同时利用红外接近开关检测人的姿态是否为趴着,决定是否延时关闭,既减少了电能的浪费,又能提示使用者保持正确的坐姿。设计中采用大容量锂聚合物电池为系统电路及照明电路供电,理论上可工作33小时,使用起来更便捷。

With the development of sensor technology and the improvement of user demand,out of the consideration of energy saving and eye protection,many table lamps in the market have the function of adjusting brightness,but most of them are adjusted by manual adjustment,such as knob adjustment and touch adjustment. The intelligent lamp designed in this paper detects someone in front of the lamp through the infrared induction module of the human body. Based on the environmental brightness collected by the illuminance sensor,the LED lamp brightness is automatically adjusted by PWM voltage regulation mode to meet the requirements of reading and writing. At the same time,the infrared proximity switch is used to detect whether the posture of the person is lying down,and to decide whether to delay the shutdown,which cannot only reduce the waste of electric energy,but also prompt the user to keep the correct sitting position. Large capacity lithium polymer battery is used to supply power to the system circuit and lighting circuit,it can work for 33 hours in theory,which is more convenient to use.