Page 70 - 《应用声学》2023年第3期

第 42 卷 第 3 期 Vol. 42, No. 3
2023 年 5 月 Journal of Applied Acoustics May, 2023

⋄ 研究报告 ⋄

跨金属厚壁的视频超声无线通信系统

崔红涛 曹自平 † 孙超林

(南京邮电大学通信与信息工程学院 南京 210003)

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。
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
中图法分类号: O429 文献标识码: A 文章编号: 1000-310X(2023)03-0508-06
DOI: 10.11684/j.issn.1000-310X.2023.03.008

Video transmission system based on ultrasonic wireless communication across

metal thick wall

CUI Hongtao CAO Ziping SUN Chaolin

(School of Communication and Information Engineering, Nanjing University of Posts and Telecommunications,
Nanjing 210003, China)

Abstract: 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.
Keywords: Ultrasonic wireless communication; Video wireless transmission; Adaptive time-domain equalizer;
Echo cancellation

2022-05-04 收稿; 2022-08-08 定稿
作者简介: 崔红涛 (1996– ), 男, 河南周口人, 硕士研究生, 研究方向: 超声波无线通信。
† 通信作者 E-mail: caozp@njupt.edu.cn