跨金属厚壁的视频超声无线通信系统  

Video transmission system based on ultrasonic wireless communication across metal thick wall

作　　者：崔红涛 曹自平[1] 孙超林 CUI Hongtao;CAO Ziping;SUN Chaolin(School of Communication and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《应用声学》2023年第3期508-513,共6页Journal of Applied Acoustics

摘　　要：视频无线传输作为高速通信技术的重要应用场景之一,目前在跨金属超声无线通信领域还鲜见报道,为此,基于现场可编程逻辑门阵列芯片采用单载波时域均衡技术搭建了一套高速的跨金属超声无线通信系统。系统以工作频率10 MHz的锆钛酸铅压电陶瓷超声换能器作为超声波的发射端和接收端,基于符号最小均方算法在现场可编程逻辑门阵列中构建自适应时域均衡器以实现回波消除。以系统摄像头所采集现场视频数据作为信号源,开展了在厚度50 mm铝板双侧之间的超声无线通信实验。结果表明在穿透厚铝板时,单载波时域均衡技术让系统接收信噪比由原来的10.46 dB提高到19.08 dB,使得实时视频无线传输得以实现。As one important application of high-speed communication,video wireless transmission was rarely reported in the field of ultrasonic wireless communication through metal barriers.In this article single carrier time-domain equalization(SC-TDE)based on field programmable gate array(FPGA)was adopted to establish a miniature system of high-speed ultrasonic wireless communication through metal sheets.This system was mainly composed of a pair of 10 MHz PZT transducers for transmitting and receiving ultrasonic waves,and an adaptive time-domain equalizer based on sign-least mean square algorithm for canceling echoes.By using video data from the camera connected to the system as the signal source,the ultrasonic wireless communication across a 50 mm thick aluminum sheet was carried out.The results indicated that SC-TDE significantly increased the signal to noise ratio from 10.46 dB to 19.08 dB,and allowed the successful accomplishing of the real-time video wireless transmission though the aluminum sheet.

关 键 词：超声波无线通信 视频无线传输 自适应时域均衡器 回波消除 

分 类 号：O429[理学—声学]