不同可见光接收元件对 LED 调制效率影响研究
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引用本文:宋素真,桂林,张华,魏巍,郑艺璇,韦晓琪.不同可见光接收元件对 LED 调制效率影响研究[J].上海第二工业大学(英文版),2021,(3):219-222
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Author NameAffiliation
SONG Su-zhen College of Computer and Information Engineering, Shanghai Polytechnic University, Shanghai 201209, China 
GUI Lin College of Computer and Information Engineering, Shanghai Polytechnic University, Shanghai 201209, China 
ZHANG Hua College of Computer and Information Engineering, Shanghai Polytechnic University, Shanghai 201209, China 
WEI Wei College of Computer and Information Engineering, Shanghai Polytechnic University, Shanghai 201209, China 
ZHENG Yi-xuan College of Computer and Information Engineering, Shanghai Polytechnic University, Shanghai 201209, China 
WEI Xiao-qi College of Computer and Information Engineering, Shanghai Polytechnic University, Shanghai 201209, China 
基金项目:上海第二工业大学校基金飞跃计划 (EGD19XQD10) 资助
中文摘要:针对提升可见光通信 (visible light communication, VLC) 信息传输效率问题, 研究了不同光接受元件下发光 二极管 (light emitting diode, LED) 调制效率问题。VLC 系统通过光接收元件接收发端的可见光信号, 以确保信号的 有效传输。在偏压为 3.4 V, 发射端与接收端之间距离为 10 cm 的实验条件下, 测量并比较了接收端为 LED、硅光电 池和光电传感器时, 白光 LED 的调制效率。根据实验数据和拟合的结果表明: 当硅光电池为光接收元件时, 发射端 的 LED 调制效率最高, 线性度较好, 一次拟合的 R2 数值可以达到 0.95 以上; 当光电传感器为光接收元件时, 其调 制效率为硅光电池调制效率的 66.15%~82.67%; 当 LED 为接收元件时, 在调制效率较高的 2.2~5.0 V (峰-峰值) 区 域内, 其调制效率仅仅为硅光电池的 34.48%。
中文关键词:可见光通信  发光二极管  光接收元件  非线性  调制效率
 
Study of Effects on LED Modulation Efficiency Under Different Light Receiving Elements
Abstract:Aiming at improving the efficiency of visible light communication (VLC) information transmission, the problem of light emitting diode (LED) modulation efficiency under different light receiving elements is studied. The VLC system receives the visible light signal at the beginning through light receiving elements to ensure effective signal transmission. Under the experimental conditions that the bias voltage is 3.4 V and the distance between the transmitting and the receiving end is 10 cm, the modulation efficiency of the LED detector, silicon photocell and photoelectric sensor to the white light LED is measured and compared. According to the experimental data and fitting, when the silicon photocell is used as the light receiving element, the LED at the transmitting end has the highest modulation efficiency and good linearity. The R2 value of a single fitting can reach more than 0.95. When the photoelectric sensor is used as an optical receiving element, its modulation efficiency is 66.15%~82.67% of that of silicon photocell. When the LED is used as the receiving element, the modulation efficiency is only 34.48% of that of the silicon photocell in the region of 2.2~5.0 V with high modulation efficiency.
keywords:visible light communication  light emitting diode  light receiving element  nonlinearity  modulation efficiency
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