Enhanced flexural wave sensing by adaptive gradient-index metamaterials

Y. Y. Chen, R. Zhu, M. V. Barnhart, G. L. Huang*

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

90 引用 (Scopus)

摘要

Increasing sensitivity and signal to noise ratios of conventional wave sensors is an interesting topic in structural health monitoring, medical imaging, aerospace and nuclear instrumentation. Here, we report the concept of a gradient piezoelectric self-sensing system by integrating shunting circuitry into conventional sensors. By tuning circuit elements properly, both the quality and quantity of the flexural wave measurement data can be significantly increased for new adaptive sensing applications. Through analytical, numerical and experimental studies, we demonstrate that a metamaterial-based sensing system (MBSS) with gradient bending stiffness can be designed by connecting gradient negative capacitance circuits to an array of piezoelectric patches (sensors). Furthermore, we demonstrate that the proposed system can achieve more than two orders of magnitude amplification of flexural wave signals to overcome the detection limit. This research encompasses fundamental advancements in the MBSS with improved performance and functionalities, and will yield significant advances for a range of applications.

源语言英语
文章编号35048
期刊Scientific Reports
6
DOI
出版状态已出版 - 17 10月 2016
已对外发布

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Chen, Y. Y., Zhu, R., Barnhart, M. V., & Huang, G. L. (2016). Enhanced flexural wave sensing by adaptive gradient-index metamaterials. Scientific Reports, 6, 文章 35048. https://doi.org/10.1038/srep35048