Heifetz Alexander, Shribak Dmitry, Huang Xin, Wang Boyang, Saniie Jafar, Young Jacey, Bakhtiari Sasan, Vilim Richard B
IEEE Trans Ultrason Ferroelectr Freq Control. 2020 Jun;67(6):1192-1200. doi: 10.1109/TUFFC.2020.2968891. Epub 2020 Jan 23.
Transmission of information using ultrasonic elastic waves on existing metallic pipes provides an alternative communication option across physical barriers in a highly partitioned industrial complex, such as a nuclear facility. This work investigates the feasibility of the transmission of digital images over metallic pipes. Ultrasonic communication systems for transmission of images on a nuclear-grade stainless steel pipe were assembled for bench-scale demonstration. Information carriers in this system are refracted shear waves transmitted and received with piezoelectric transducers (PZTs) operating at 2-MHz nominal frequency. The refraction and propagation of ultrasonic shear waves were modeled with COMSOL software. An amplitude shift keying (ASK) communication protocol for image transmission was developed and implemented in the GNURadio software-defined radio (SDR) environment. Digital information was converted to analog ultrasonic signals using Red Pitaya electronic boards. The performance of the ASK protocol is evaluated at the output of every block in the GNURadio program by monitoring the transmission of select characters. Using the ASK communication protocol, the transmission of the 32-KB image was demonstrated at 2-Kbps bitrate across 6-ft-long stainless steel pipe. Preliminary evaluation of ultrasonic communication on the piping of a nuclear facility, such as signal transmission on bent pipes, was performed with COMSOL computer simulations.
利用超声波弹性波在现有的金属管道上传输信息，为跨越高度分隔的工业园区（如核设施）中的物理屏障提供了一种替代通信方式。这项工作研究了在金属管道上传输数字图像的可行性。组装了用于在核级不锈钢管道上传输图像的超声通信系统，用于实验室规模的演示。该系统中的信息载体是由标称频率为2兆赫的压电换能器（PZT）发射和接收的折射剪切波。利用COMSOL软件对超声剪切波的折射和传播进行了建模。开发了一种用于图像传输的幅移键控（ASK）通信协议，并在GNURadio软件定义无线电（SDR）环境中实现。使用Red Pitaya电子板将数字信息转换为模拟超声信号。通过监测选定字符的传输，在GNURadio程序中每个模块的输出端评估ASK协议的性能。使用ASK通信协议，在6英尺长的不锈钢管道上以2千比特每秒的比特率演示了32千字节图像的传输。利用COMSOL计算机模拟对核设施管道上的超声通信进行了初步评估，如弯管上的信号传输。
