A Magnetic-Dependent Vibration Energy Harvester Based on the Tunable Point Defect in 2D Magneto-Elastic Phononic Crystals
A Magnetic-Dependent Vibration Energy Harvester Based on the Tunable Point Defect in 2D Magneto-Elastic Phononic Crystals
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基于二维磁弹性声子晶体可调谐点缺陷的磁相关振动能量收集器
DOI：
10.3390/cryst9050261
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发表时间：
2019-05
期刊：
影响因子：
2.7
通讯作者：
Yuanwen Gao
中科院分区：
文献类型：
--
作者：
Tian Deng;Shunzu Zhang;Yuanwen Gao
利用二维磁弹性声子晶体的点缺陷效应和压电材料的压电效应，设计了一种新型的振动能量采集器。通过去除中心的Tenfenol-D棒，将振动能量限制和增强到一个点上，形成点缺陷，然后在点缺陷区域安装一个压电片，将振动能机电转换为电能。将有限元方法与超网格技术相结合，可对点缺陷进行数值分析。采用能准确描述磁致伸缩材料磁力耦合本构行为的三维郑柳(Z-L)模型，通过施加磁场和预应力沿z方向得到可变的能带结构。利用压电材料根据振动能转化为电能的能力来预测输出电压和功率。数值结果表明，对于所提出的可调谐振动能量采集系统，平面内混合波模(XY模)的带隙和缺陷带可以通过外加磁场和预应力在很大程度上进行调整，从而获得更大的振动频率范围和更宽的能量分布。然而，反平面波模(Z模)中的缺陷带随外加磁场的变化而略有变化，这导致了能量收集的一定频率范围。这些结果可为工程上小功率设备的智能隔振控制和连续电源的主动设计提供指导。
In this work, an innovative vibration energy harvester is designed by using the point defect effect of two-dimensional (2D) magneto-elastic phononic crystals (PCs) and the piezoelectric effect of piezoelectric material. A point defect is formed by removing the central Tenfenol-D rod to confine and enhance vibration energy into a spot, after which the vibration energy is electromechanically converted into electrical energy by attaching a piezoelectric patch into the area of the point defect. Numerical analysis of the point defect can be carried out by the finite element method in combination with the supercell technique. A 3D Zheng-Liu (Z-L) model which accurately describes the magneto-mechanical coupling constitutive behavior of magnetostrictive material is adopted to obtain variable band structures by applied magnetic field and pre-stress along the z direction. The piezoelectric material is utilized to predict the output voltage and power based on the capacity to convert vibration energy into electrical energy. For the proposed tunable vibration energy harvesting system, numerical results illuminate that band gaps (BGs) and defect bands of the in-plane mixed wave modes (XY modes) can be adjusted to a great extent by applied magnetic field and pre-stress, and thus a much larger range of vibration frequency and more broad-distributed energy can be obtained. The defect bands in the anti-plane wave mode (Z mode), however, have a slight change with applied magnetic field, which leads to a certain frequency range of energy harvesting. These results can provide guidance for the intelligent control of vibration insulation and the active design of continuous power supply for low power devices in engineering.
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影响因子：
4.1
作者：
Cheng, Jian-Chun;Chen, Qian;Zou, Xin-Ye;Liang, Bin
通讯作者：
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影响因子：
1.6
作者：
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DOI：
10.1145/313817.313840
发表时间：
1999-08
期刊：
Proceedings. 1999 International Symposium on Low Power Electronics and Design (Cat. No.99TH8477)
影响因子：
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作者：
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通讯作者：
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影响因子：
4.6
作者：
Ching, NNH;Wong, HY;Wen, ZY
通讯作者：
Wen, ZY
DOI：
10.1109/92.920820
发表时间：
2001-02-01
影响因子：
2.8
作者：
Meninger, S;Mur-Miranda, JO;Lang, JH
通讯作者：
Lang, JH