Performance of a piezoelectric bimorph for scavenging vibration energy
Performance of a piezoelectric bimorph for scavenging vibration energy
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DOI：
10.1088/0964-1726/14/4/036
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发表时间：
2005-08
影响因子：
4.1
通讯作者：
Shu-nong Jiang;Xian‐Fang Li;S. Guo;Yuantai Hu;Jia-shi Yang;Q. Jiang
中科院分区：
文献类型：
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作者：
Shu-nong Jiang;Xian‐Fang Li;S. Guo;Yuantai Hu;Jia-shi Yang;Q. Jiang
我们分析了压电双晶片在弯曲模式下收集环境振动能的性能，并评估了性能对双晶片模型的物理和几何参数的依赖性。压电双晶片弯曲运动的解析解表明，输出功率密度最初增加，达到最大值，然后随着负载阻抗的增加而单调下降，该负载阻抗通过一个由收集结构（双晶片）的物理和几何参数以及环境振动频率简单组合而成的参数进行归一化，这强调了负载电路具有收集结构所需阻抗的重要性。数值结果表明，通过调整收集结构的物理和几何参数可显著提高性能。
We analyze the performance of a piezoelectric bimorph in the flexural mode for scavenging ambient vibration energy and evaluate the dependence of the performance upon the physical and geometrical parameters of the model bimorph. The analytical solution for the flexural motion of the piezoelectric bimorph shows that the output power density increases initially, reaches a maximum, and then decreases monotonically with increasing load impedance, which is normalized by a parameter that is a simple combination of the physical and geometrical parameters of the scavenging structure, the bimorph, and the frequency of the ambient vibration, underscoring the importance for the load circuit to have the impedance desirable by the scavenging structure. The numerical results illustrate the considerably enhanced performances achieved by adjusting the physical and geometrical parameters of the scavenging structure.