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摘 要
目前,青少年视力低下已成为国内外共同关心的问题。资料显示,我国小学生视力低下率为26.96%,初中生53.43%,高中生72.8%,大学生77.95%。特别是调查显示50%以上的学生及家长缺乏视力保健最基本的科普知识,不懂得不提前预防和及时治疗近视的危害性,因而有41.6%视力低下的学生并未采取任何矫正措施,又缺专业机构的治疗。
基于以上原因,本论文提出了智能红外视力保护仪的设计思路。智能红外视力保护仪主要包含测距、感光和定时三大功能。其中测距和感光模块由相应功能的传感器构成,能实现对使用者距离与周围光线强弱的检测和报警功能。处理模块由STC89C51单片机运行程序构成,能实现对学习时间进行定时并通过报警来提示时间已到的功能。总体上讲,本设计的这三个功能能同时生效,并通过报警灯闪烁和蜂鸣器报警的方式提醒使用者注意用眼卫生。
本文通过实践证明该视力保护器可行且可靠性很好,使用方便。本文期望通过该电子硬件的制作和理论的研究,能为后期进一步设计多功能视力保护器并采取合理措施提高视力保护的有效性提供可靠和有效的数据源和信息依据。
关键词:传感器,测距,红外,视力保护
ABSTRACT
At present, adolescent eyesight has become the domestic and international issues of common concern. Data show that China’s primary vision, low rate of 26.96%, 53.43% junior high school students, 72.8% senior high school students, college students 77.95%. Especially the survey shows that 50% more of the students and parents lack of vision care the most basic science knowledge,harmfulness does not know ahead of time is not timely prevention andtreatment of myopia, thus there are 41.6% low vision students did not take any corrective measures, treatment and lack of professional organizations.
Based on the above reasons, this paper puts forward intelligent infrared vision protection design instrument. Intelligent infraredeyesight protecting instrument mainly includes the location, sensitiveand timing of three functions. The location and the photosensitivesensor module is composed of the corresponding functions, can realize the detection of the user distance and ambient light intensityand alarm function. The processing module is composed ofSTC89C51 microcontroller running the program, can realize time and through the alarm to prompt the time has come for the function oflearning time. Generally speaking, the three function of this designcan in effect at the same time, and through the alarm lights andbuzzer alarm way to remind users to pay attention to eye health.
In this paper, through the practice proved the vision protector is feasible and has good reliability, easy to use. In this paper, through the study of the electronic hardware production and theoretical, for the latter part of the further design of multi-function vision protectionand provide the reliable and effective source of data and informationon the basis of improving the effectiveness of vision protection and reasonable measures taken.
Keywords: Sensor, ranging, infrared, eyesight protection
目录






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