Phononic crystals with incomplete line defects: applications in high-performance and broadband acoustic energy localization and harvesting

IF 3.7 3区 材料科学 Q1 INSTRUMENTS & INSTRUMENTATION
Guo-Yu Zhang, Zi-Jiang Liu, Bing-Zu Li, Xi-Long Dou, Cai-Rong Zhang, Xiao-Wei Sun and Yi-Man Yang
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Abstract

Using phononic crystals (PnCs) to enhance the electrical output performance of piezoelectric energy harvesting (PEH) devices and broaden the frequency range of harvesting energy is crucial to solving the self-energy of low-power devices such as wireless sensors. In this work, an ultra-wide full-band gap PnC was designed. The concept of a PnC with an incomplete line defect was proposed. The energy localization and harvesting of incomplete line defect PnCs and traditional point defect and line defect PnCs were studied by finite element analysis. The results show that compared with a point defect and a line defect, the output electric power of an incomplete line defect was increased by 31.88 times and 2.51 times, respectively, and the energy localization and harvesting frequency band were widened. By exploring the influence of the periodicity of the vertical incomplete line defect direction on the electrical output performance of the PnC-based PEH system, it is found that the electrical output performance of the 5 × 3 incomplete line defect PnC is the best, and the maximum output voltage and output electric power are 27.36 V and 17.29 mW, respectively. This work provides new insights and ideas for improving the energy localization and harvesting performance of PnC-based PEH systems.
具有不完全线缺陷的声波晶体:在高性能和宽带声能定位与采集中的应用
利用声子晶体(PnC)提高压电能量收集(PEH)器件的电输出性能并拓宽收集能量的频率范围,对于解决无线传感器等低功耗器件的自能量问题至关重要。本研究设计了一种超宽全带隙 PnC。提出了具有不完整线路缺陷的 PnC 概念。通过有限元分析研究了不完整线缺陷 PnC 和传统的点缺陷和线缺陷 PnC 的能量定位和收集。结果表明,与点缺陷和线缺陷相比,不完整线缺陷的输出电功率分别提高了 31.88 倍和 2.51 倍,能量定位和收集频带也有所拓宽。通过探讨垂直不完整线缺陷方向的周期性对基于 PnC 的 PEH 系统电输出性能的影响,发现 5 × 3 不完整线缺陷 PnC 的电输出性能最好,最大输出电压和输出电功率分别为 27.36 V 和 17.29 mW。这项工作为提高基于 PnC 的 PEH 系统的能量定位和收集性能提供了新的见解和思路。
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来源期刊
Smart Materials and Structures
Smart Materials and Structures 工程技术-材料科学:综合
CiteScore
7.50
自引率
12.20%
发文量
317
审稿时长
3 months
期刊介绍: Smart Materials and Structures (SMS) is a multi-disciplinary engineering journal that explores the creation and utilization of novel forms of transduction. It is a leading journal in the area of smart materials and structures, publishing the most important results from different regions of the world, largely from Asia, Europe and North America. The results may be as disparate as the development of new materials and active composite systems, derived using theoretical predictions to complex structural systems, which generate new capabilities by incorporating enabling new smart material transducers. The theoretical predictions are usually accompanied with experimental verification, characterizing the performance of new structures and devices. These systems are examined from the nanoscale to the macroscopic. SMS has a Board of Associate Editors who are specialists in a multitude of areas, ensuring that reviews are fast, fair and performed by experts in all sub-disciplines of smart materials, systems and structures. A smart material is defined as any material that is capable of being controlled such that its response and properties change under a stimulus. A smart structure or system is capable of reacting to stimuli or the environment in a prescribed manner. SMS is committed to understanding, expanding and dissemination of knowledge in this subject matter.
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