功率型白光LED无线音频传输系统设计  

Design of wireless audio transmission system based on power white LED

作　　者：周锦荣[1] 洪伯达 纪培彬 Zhou Jinrong;Hong Boda;Ji Peibin(College of Physics and Information Engineering,Minnan Normal University,Zhangzhou 363000)

机构地区：[1]闽南师范大学物理与信息工程学院,漳州363000

出　　处：《黑龙江八一农垦大学学报》2017年第1期119-123,143,共6页journal of heilongjiang bayi agricultural university

基　　金：福建省自然科学基金项目(2016J01758);福建省资助省属高校科研专项(JK2016026);福建省教育科研项目(JAT160284);2015年大学生创新创业训练计划项目资助(201510402011)

摘　　要：该无线音频传输系统以功率型白光LED作为传输媒介,主要由音频信号调制电路、LED驱动电路、锁相环译码还原电路、音频功放电路组成。该系统利用多谐振荡器电路产生的载波对输入音频信号进行模拟调制后送LED驱动电路进行发射传输。LED发射的光信号被硅光电池接收,经过锁相环电路解调并滤除高频载波得到原有的输入音频信号。实验测试结果表明,该系统在2 m范围内能较好实现输入频率为200 Hz^2 k Hz的音频信号传输,对室内可见光通信应用具有一定的参考价值。The wireless audio transmission system relyed on power white LED as a transmission medium,mainly consisted of the audio signal modulation circuit,a LED driver circuit,reducing the decoding phase locked loop circuit and an audio amplifier circuit.The system used multivibrator circuit to generate a carrier input audio signal analog modulation evacuation LED driver circuit to transmit transmission.Optical signal emitted by the LED was received silicon photovoltaic cells,filtered through a phase locked loop circuit and a high frequency carrier demodulation to get the original input audio signal.The test results showed that the system could achieve better audio signal transmission input frequency of 200 Hz-2 kHz in the range of 2 m.It had a certain reference value for indoor visible light communication applications.

关 键 词：LED光通信 无线音频传输 调制解调电路 多谐振荡器 

分 类 号：TN929.12[电子电信—通信与信息系统]