井下可见光语音传输系统设计

Design of underground voice transmission system by visible light

基于井下可见光通信对通信速率要求不高的特点,采用脉冲编码调制方式,设计了一种可实现移动矿灯与液压顶板LED基站之间通信的井下可见光语音传输系统。该系统采用TP3067芯片对语音信号进行脉冲编码,将编码信号叠加直流信号来驱动LED器件,接收端对接收的编码信号进行光电检测和放大处理后,解码恢复出语音信号。实验结果表明,该系统在2.048 Mbit/s通信速率下,接收光功率为-9dB·m时,系统误码率为10^(-83),实现了语音信号不失真传输。

Based on low communication rate requirement of underground visible light communication,an underground voice transmission system by visible light between mobile cap-lamp and hydraulic ram LED base station was designed by use of pulse code modulation mode.In the system,voice signal is coded by TP3067,and the coded signal is added direct current signal to drive LED.The received coded signal by receiver is decoded to renew the voice signal after photoelectric detection and amplifying.The experimental results show that the system error rate is 10^（-83） when receiving power is-9 dB·m under system communication rate of 2.048 Mbit/s,which realizes voice transmission without distortion.