超低照度下的可见光物联网终端设计  

Design of Visible Light-Based Internet of Things Terminal Under Ultralow Illumination Conditions

作　　者：潘天豪 陈雄斌 闵成彧[3] 孙启功 毛旭瑞 Pan Tianhao;Chen Xiongbin;Min Chengyu;Sun Qigong;Mao Xurui(School of Micro-Eletromics,University of Chinese Acadeny of Sciences,Beijing 101408,China;Center of Matrials Science and Optoeletronis Engineering,Uniresity of Chinese Aaademy of Sciences,Bei jing 100049,China;State Key Laboratory on Integruted Optoelectromis,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China)

机构地区：[1]中国科学院大学微电子学院,北京101408 [2]中国科学院大学材料与光电研究中心,北京100049 [3]中国科学院半导体研究所集成光电子学国家重点实验室,北京100083

出　　处：《光学学报》2020年第7期21-27,共7页Acta Optica Sinica

基　　金：国家重点研发计划(2017YFB0403605);国家自然科学基金(61875183);中国科学院基金项目(GQRC-19-03)。

摘　　要：针对物联网的广覆盖、多连接的应用需求,研究了超低照度下的可见光通信技术。采用LED照明灯发送红外协议格式的可见光信号时,调制深度小于0.625%时人眼觉察不到闪烁。参考朗伯光源辐射模型,模拟了一个30 m×2.1 m×2.6 m的室内可见光通信场景,仿真结果表明调制深度为0.46%时使用20×12阵列的9.7 W LED照明灯作为发射装置,其有效光信号覆盖范围可达616 m^2。在实验室搭建了可见光智能家居系统,测试遥控机器人对该信号响应准确率为100%时的最远距离,实验测试结果为14.3 m,与仿真运算结果14 m间相对误差约为2%。In this study, we investigate the visible light communication technology under ultralow illumination to satisfy the wide coverage and multiconnection requirements associated with the internet of things. A light-emitting diode(LED) is used to transmit the visible light signals in the infrared protocol format. The calculations denote that the human eye can not notice flicker when its modulation depth is less than 0.625%. Further, an indoor visible light communication scene(30 m×2.1 m×2.6 m) is simulated by considering a Lambertian source radiation model;the signal coverage become 616 m^2 when a 9.7 W LED illumination lamp with a 20×12 array is used as the transmitting device and the modulation depth is 0.46%. Subsequently, a visible light-based intelligent home system is developed in the laboratory to estimate the farthest distance at which a remotely controlled robot can respond to the signal with 100% accuracy. The relative error between the experimental results obtained at 14.3 m and the simulation results obtained at 14 m is 2%.

关 键 词：光通信 智能家居系统 双模光电接收器 红外控制系统 

分 类 号：TN929.12[电子电信—通信与信息系统]