学位论文-—基于单片机的led智能补光台灯设计.doc

摘 要 随着现代社会的发展，中国青少年的近视率一直居高不下，成为困扰中国家庭的主要问题。随着科学技术的进步，科学家希望通过人工干预和治疗，从根本上解决近视问题。然而现代医学的发展虽然可以解决很多曾经困扰人类的疑难问题，却仍然不能从根源上预防和祛除近视。我们通过对影响视力的各种因素进行实验，发现造成青少年视力下降的最主要根源是灯光。传统护眼灯为了达到提高频率的目的，使用了高频镇流器，使得护眼灯的电磁辐射远比一般的电器高得多，是手机、电脑的数倍甚至数十倍，严重影响视力。而LED照明技术的出现，为我们提供了消除仅是问题的途径。本文基于单片机控制的智能补光系统，全天候模拟出上午9、10点钟自然光照，完全杜绝频闪、辐射和眩光，有效消除传统光源中紫外线、红外线，能有效降低因光线变暗或变亮对人眼睛的伤害，可以有效减少对电能的消耗，节能环保。 针对现代社会近视率居高不下的现象，提出了基于MCS-51单片机的LED智能补光系统对外界光线的自动采集和调整，以减少由于外界光线变亮变暗对人眼的伤害。实验结果表明LED灯管的亮度可以柔和地根据外界光线的变化而变化，不存在闪烁和刺眼现象。通过光敏电阻采集外部光照和光通量的变化，采集到的变化值经过和基准值比较后送到单片机进行运算，由MCU控制数字量的输出，从而改变流经LED灯管的电流，以此来调整LED的亮度，以接近自然光的状态运行，实现智能补光。 关键词：台灯 光度 PWM调光 自动调节 With?the?development?of?modern?society,?the?China?youth?myopia?rate?has?been?high,?become?the?main?problems?of?Chinese?family.?With?the?progress?of?science?and?technology,?scientists?hope?to?use?artificial?intervention?and?treatment,?fundamentally?solves?the?problem?of?myopia.?However,?although?the?development?of?modern?medicine?can?solve?many?difficult?problems?have?plagued?mankind,?myopia?still?cannot?prevent?from?the?source?and?eliminate.?Our?experiments?on?various?factors?affecting?the?eyesight,?found?that?the?most?major?causes?of?adolescent?eyesight?to?drop?is?light.?The?traditional?eye?protection?lamp?in?order?to?improve?the?frequency?of?the?use?of?high?frequency?ballasts,?electromagnetic?radiation,?make?the?eye?protection?lamp?is?much?higher?than?the?general?electrical?appliances,?mobile?phone,?computer?is?several?times?even?dozens?of?times,?seriously?affect?vision.?LED?lighting?technology,?provides?us?with?a?way?to?eliminate?is?only?part?of?the?problem.?In?this?paper,?intelligent?lighting?system?based?on?single?chip?microcomputer,?all-weather?simulate?the?morning?of?the?9,?ten?oclock,?natural?light,?completely?eliminate?the?stroboscopic,?radiation?and?glare,?the?effective?elimination?of?traditional?light?sources?in?the?ultraviolet,?infrared,?can?effectively?reduce?the?light?dimming?or?brightening?of?the?human?eye?damage,?c