基于红外测距技术的预防近视系统设计

Design of preventing myopia based on infrared measuring distance technology

针对当前学生近视问题日趋严重现象,总结了患近视的一个重要原因是过度看近,依据红外测距原理,提出了利用红外测距技术来预防近视的方法并进行了系统设计。采用GP2D12红外测距传感器作为信号采集装置,将采集的数据进行实验分析、处理,得出了线性化公式。信号线性化后通过ADC0809转换为数字信号,输入AT89S51单片机中处理。当使用者过度看近时,警告电路工作,告知调整坐姿,同时对人眼离书或者笔的距离进行动态显示,达到有效预防近视目的。

At present,the phenomenon of student myopia is on the rise,an important cause of myopia is to look over near.In the paper,in put forward a way using infrared measuring distance technology to prevent myopia,and carry out a system design.Signal acquisition device adopt GP2D12,and linearization formula obtained by process experimental data.Linearization signals turn into digital signals by the ADC0809,and digital signals are processed by AT89S51.When the users look over near,the warning circuit will operate,it achieves a goal to prevent myopia.