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arXiv 2110.00136physics.app-ph
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散射编码弹性元边界

Scattering-coded elastic meta-boundary

Tianxi Jiang, Xinxin Liao, Hao Huang, Zhi-Ke Peng, Qingbo He

摘要:

通过主动弹性波的目标定位是一项关键技术,但通常需要具有复杂硬件的换能器阵列。虽然计算传感已被证明能够克服传感器阵列的短周期,通过合并人工设计的结构到传感过程中,编码的空间弹性波的主动目标识别仍然是一个知识空白。在这里,我们提出了一个散射编码的弹性元边界组成的随机分布的散射体的计算识别的对象与一个单一的换能器。元边界的多次散射效应将复杂性引入散射场,以实现弹性波的高度不相关的散射编码,从而消除对象位置信息的模糊性。我们证明了对象的位置可以通过使用我们设计的元边界的散射编码来唯一地识别,提供了一个用于人机交互的元边界触摸屏的设计。提出的散射编码元边界开辟了途径,人工设计的边界与信息编码和识别的能力,并可能提供重要的应用波传感,如结构监测,水下检测,室内定位,和生物医学成像。

英文摘要:

Object localization through active elastic waves is a crucial technology, but generally requires a transducer array with complex hardware. Although computational sensing has been demonstrated to be able to overcome the short-comings of transducer array by merging artificially designed structures into sensing process, coding spatial elastic waves for active object identification is still a knowledge gap. Here we propose a scattering-coded elastic meta-boundary composed of randomly distributed scatterers for computational identification of objects with a single transducer. The multiple scattering effect of the meta-boundary introduces complexity into scattered fields to achieve a highly uncorrelated scattering coding of elastic waves, thereby eliminating the ambiguity of the object location information. We demonstrate that the locations of objects can be uniquely identified by using the scattering coding of our designed meta-boundary, delivering a design of meta-boundary touchscreen for human-machine interaction. The proposed scattering-coded meta-boundary opens up avenues for artificially designed boundaries with the capability of information coding and identification, and may provide important applications in wave sensing, such as structural monitoring, underwater detection, indoor localization, and biomedical imaging.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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