摘要在如今的社会中，大量的数码电子产品充斥在人们的生活中，例如手机、电 脑。不仅仅带来的只是便利另外带来的跟多的是伤害：近视，尤其是青少年，近 视的发病率极高。学生读书学习做作业大量用眼，并且不健康的用眼导致大量的 学生成为“四眼”，不但对身体有伤害也对他们的心里造成一定的伤害。现在的 父母都在积极关注如何保护视力，好让他们的孩子健康快乐的成长。

本文的视力保护系统设计是基于 51 单片机来设计的，当用眼时间超过一定 时间的时候，用眼错误或者是光线不利于观看时，借助多种传感器采集的信号， 经过 51 单片机的处理，实现报警提醒，达到保护视力的作用，青少年可以更加 健康快乐的成长。72280

本文工作的主要内容是：阐述了近视眼发生的原因，对比得出现在得视力保 护方法问题的不足指出提出我这个设计的必要性。提出方案，由 AT89C51 单片机 主控模块、超声波检测模块、蜂鸣器报警模块、光线强度检测模块以及一个简单 的倒计时组成。检测光照强度的模块，测量超声波的模块，显示器的模块，设计 出电路写出软件的程序。实现视力保护系统完成各种设计的功能，起到保护视力 的作用。

本文有 17 个图，表 1 个，参考文献 15 篇。

毕业论文关键词：保护视力 51 单片机 超声波测距 光线强度检测 定时器

Based on SCM vision protection system design

Abstract In today's society, with a large number of digital electronic products in people's life, such as mobile phones, computers。 Not only bring convenience in addition is the more hurt: myopia, especially teenagers, the incidence of myopia is extremely high。 Students do homework reading and studying a lot, with the eye and unhealthy use eye leads to a large number of students to become "four eyes", not only have a harm to the body is also a certain amount of damage to their hearts。 Now parents are actively focus on how to protect vision, to make their children grow up healthy and happy。

Eyesight protection system design of this article is based on 51 single chip microcomputer to design, when the time over a certain period of time with the eye, error or the light is not conducive to watch with the eye, with a variety  of  sensor signal acquisition, through 51 SCM processing, realize the alarm to remind, protect vision, the growth of the teenagers can be more healthy and happy。

The main content of the paper work is: This paper expounds the causes myopic eyes, contrast vision protection method question now come to the insufficient points out the necessity of this design。The proposed scheme, main control module, ultrasonic detection module using single-chip computer AT89C51, buzzer alarm module, light intensity detection module and a simple countdown。The detection of light intensity of the module, ultrasonic measurement module, display module, write a  software program designed circuit。Tmplementing vision protection system to complete the function of the various design, have the effect of protecting eyesight。

In this paper, there are 17 charts, 1tables , 15references 。

Key words: Protect eyesight 51 Microcontroller Ultrasonic Ranging Detecting light intensity Timer

目录

摘要 I

Abstract II

目录 III

1 绪论