IEEE Trans Ultrason Ferroelectr Freq Control. 2022 Jul;69(7):2390-2399. doi: 10.1109/TUFFC.2022.3171729. Epub 2022 Jun 30.
Data transmission through solid metallic channels is recommended in certain industries where no other options are proposed, such as nuclear, aerospace, and smart vehicles. In addition to the Faraday shielding effect of electromagnetic waves, another issue related to damage presence due to mechanical loads exists. Severe damage in the transmission channel leads to signal loss at the receiver. For this sake, ultrasonic guided waves, such as Lamb waves, maybe a good substitute since they can propagate through long distances in solid metallic structures. The scope of this work is to build a reliable, reproducible, and high data-rate wireless communication experimental platform, using ultrasonic guided waves, through healthy and damaged plates for industrial usage. The target is to compensate at first for the effect of dispersion, reverberation, scattering, and boundary reflections for the healthy plate. The novelty of this work falls within the performance analysis of the demodulation algorithm based on cross-correlation combined with binary phase-shift keying (BPSK), using a finite-element simulation through healthy and damaged plates with different depths of symmetrical and asymmetrical notches (SN and AN) and steps based on the bit error percentage (BEP). Furthermore, another contribution related to the impact of multiple reflections and mode conversions caused by symmetrical and asymmetrical steps and notches is taken into account. After this, numerical results are validated using an ultrasonic guided wave experimental platform. Results based on BEP analysis prove that the algorithm has successfully compensated for the effect of dispersion and boundary reflections for the healthy plate and multiple reflections and mode conversions for the damaged ones. A highly effective data rate of up to 350 kb/s can be reached even in the presence of severe damage in the transmission channel.
在某些行业中，例如核工业、航空航天和智能汽车，推荐使用固体金属通道进行数据传输，因为这些行业没有其他选择。除了电磁波的法拉第屏蔽效应外，还存在与机械载荷引起的损坏有关的另一个问题。传输通道中的严重损坏会导致接收器处信号丢失。为此，超声导波（如兰姆波）可能是一个很好的替代品，因为它们可以在固体金属结构中长距离传播。这项工作的范围是为工业用途建立一个可靠、可重复和高数据速率的无线通信实验平台，使用超声导波通过健康和损坏的板。目标是首先补偿健康板的色散、混响、散射和边界反射的影响。这项工作的新颖之处在于基于互相关和二进制相移键控（BPSK）的解调算法性能分析，使用有限元模拟通过具有不同深度的对称和非对称缺口（SN 和 AN）以及基于误比特率（BEP）的台阶的健康和损坏板。此外，还考虑了由于对称和非对称台阶和缺口引起的多次反射和模式转换的影响。然后，使用超声导波实验平台验证数值结果。基于 BEP 分析的结果证明，该算法已成功补偿了健康板的色散和边界反射的影响，以及损坏板的多次反射和模式转换的影响。即使在传输通道严重损坏的情况下，也可以达到高达 350 kb/s 的高效数据速率。
