光学学报, 2020, 40 (7): 0706003, 网络出版: 2020-04-15   

超低照度下的可见光物联网终端设计 下载: 792次

Design of Visible Light-Based Internet of Things Terminal Under Ultralow Illumination Conditions
作者单位
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
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%。
Abstract
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%.

潘天豪, 陈雄斌, 闵成彧, 孙启功, 毛旭瑞. 超低照度下的可见光物联网终端设计[J]. 光学学报, 2020, 40(7): 0706003. Tianhao Pan, Xiongbin Chen, Chengyu Min, Qigong Sun, Xurui Mao. Design of Visible Light-Based Internet of Things Terminal Under Ultralow Illumination Conditions[J]. Acta Optica Sinica, 2020, 40(7): 0706003.

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