【摘要】 设计了一种基于单片机的视力保护器。该设计采用模块的设计方法,首先利用单片机内部定时器进行定时;其次使用光敏电阻测量光强并利用超声波模块测距离;最后利用三极管驱动蜂鸣器以及用液晶显示各种数据信息。实现了当学习时间超过45分钟时,产生声光报警,提醒学生注意休息;当光线过强或过暗,产生声光报警,提醒学生在适合的光照环境下学习;当测量的距离小于设定值,产生声光报警,确保学习时眼睛和书本保持一定的距离,从而保护视力。更多还原

【Abstract】 A vision protector based on MCU is designed. The design uses the method of module, and uses the internal timer of MCU for timing in the first place; Then, photo resistor is used to collect the intensity of light and ultrasonic module is used for measuring the distance; finally, the transistor is used to drive buzzer and the LCD screen is used for displaying various information. When students study more that 45 minutes, the buzzer produce sound and light alarm to remind the student to have a rest; When the intensity of light is too strong or too dark, it remind the student of studying under the suitable light intensity; When the distance value is below the preset warning value, it inform that the Student’s eyes and books should be kept at a certain distance. In this way we can protect our eyesight.更多还原