摘要
在比较目前近视预防器基础上,提出一种基于89C51单片机的智能化近视预防器,该预防器具有全方位性、人机界面友好、使用方法简单等特点。该预防器能针对产生近视的三大主要因素进行有效的控制。详细描述用超声波测距的方法测量用眼距离,采用光电池进行光强测量判断光线的亮暗,利用单片机定时器计时功能计算用眼时间的长短,采用语音提示,提示使用者,以达到防治近视的目的。
A smart myopia prevention device based on 89C51 MCU is presented on the basis of comparison of current myopia prevention devices. This device has characteristic feature of multi-direction, user-friendly and easy to use. The device can effectively prevent short-signedness aimed at three main factors. The method in detail that measuring the distance between eyes and objects by ultrasonic is described, olar cell measurements to determine the intensity of light is used. MCU timers to calculate time by the duration of the eyes is used. Voice alert is used to achieve the purpose of prevention of short-sight.
出处
《传感器与微系统》
CSCD
北大核心
2009年第12期27-29,共3页
Transducer and Microsystem Technologies
基金
广东省科技计划资助项目(2008B050100026)
