文档介绍：编号:
毕业设计说明书
题目眼睛视力保护器的设计
院(系): 电子工程与自动化学院
专业: 光信息科学与技术
学生姓名:
学号:
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题目类型: 理论研究实验研究√工程设计工程技术研究软件开发
2013年5 月 13 日
摘要
视力保护已成为当前社会的关注热点问题之一,尤其是青少年的视力保护。目前,青少年视力低下,已成为国内外共同关心的公共卫生问题。资料显示,我国小学生视力低下率为 %,初中生 %,高中生 %,大学生 %。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“近视与盲只差一步”的危害性,因而有 %视力低下的学生并未采取任何矫正措施,并且缺乏专业机构的治疗。因此设计一个视力保护器用来保护视力是由为重要的。
本文是基于超声波的眼睛视力保护器的设计,讨论了眼睛视力保护器的硬件设计与软件控制。本设计采用以STC852单片机为核心的低成本,高精度,微型化眼睛视力保护器的硬件电路。并通过软件控制实现所需功能。硬件设计包含:超声波发射接收电路,距离报警电路,距离显示电路,光强检测电路,光强报警电路与定时报警电路。本文祥细介绍各部件、电路的工作原理以及关于测距显示,距离报警,光强转换,光强报警,定时报警的等模块的程序设计。
经实验证明,本系统硬件设计合理、操作简单、抗干扰能力强、实时性好,可以有效地起到视力保护的作用。
关键词:视力保护器,距离报警,光强检测,定时,程序设计
Abstract
Eye protection has e one of the hot issues of social concern, especially young people's eyesight protection. At present, young people with low vision has e a public health problem mon concern at home and abroad. The data show that China's low vision students was %, junior high school students %, % of high school students, college students %. Survey shows that more than 50% of the students and their parents lack the most basic scientific knowledge of eye care, do not know the dangers of "short-sighted and blind only one step", thus % of students with low vision has not taken any corrective measures, and lack of anizations therapy. Design a vision protector to protect eyesight by important.
This article is based on the design of ultrasonic eye sight protection, eye sight protection hardware design and software control. The design uses a the STC852 microcontroller as the core, low-cost, high-precision, miniaturization eye sight protection hardware circuit. And is controlled by software to achieve the desired function. The hardware design includes: ultrasonic transmitting and receiving circuit from the alarm circuit from the circuit, the light intensity detection circuit, the light intensity alarm circuit and timing alarm circuit. This article xiangxi describes the programming of the po