A Multidirectional Piezoelectric Vibration Energy Harvester With Direction-Dependent Dual Resonance
A Multidirectional Piezoelectric Vibration Energy Harvester With Direction-Dependent Dual Resonance
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DOI：
10.1109/tuffc.2020.3045420
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发表时间：
2021-05-01
影响因子：
3.6
通讯作者：
Aksak, Burak
中科院分区：
文献类型：
--
作者：
Kovenburg, Robert;Gale, Richard;Aksak, Burak
设计、制造和测试了一种多方向基座安装式压电振动能量采集器，其具有2 mm x 2 mm x 20 mm聚氨酯谐振梁、8.36 g尖端质量和锆钛酸铅（PZT）换能器。收割机被证明是在任何方向上运行在一个2-D平面和产生多达8.2 μ W的50 M Ω负载下的谐波基础激励下的峰值加速度为0.25 g的角度为45度。实验表明，在某些方向上，采集器具有两个谐振频率，一个在36.0 Hz，一个在38.5 Hz。分析表明，这种现象是由聚氨酯梁的形状偏离预期的方形横截面引起的。这种分析是用来提出一种方法，设计收割机与任何两个所需的谐振频率。讨论了利用这种设计方法来提高采集器带宽的可能性。
A multidirectional base-mounted piezoelectric vibration energy harvester with a 2 mm x 2 mm x 20 mm polyurethane resonating beam, an 8.36-g tip mass, and a lead zirconium titanate (PZT) transducer was designed, fabricated, and tested. The harvester was shown to operate in any direction in a 2-D plane and produced as much as 8.2 mu W across a 50-M Omega load under harmonic base excitations with peak acceleration of 0.25 g at an angle of 45 degrees. Experiments showed that, in some directions, the harvester had two resonant frequencies, one at 36.0 Hz and one at 38.5 Hz. Analysis shows that this phenomenon is caused by deviations in the shape of the polyurethane beam from the intended square cross section. This analysis is used to propose a method for designing harvesters with any two desired resonant frequencies. The possibility of using this design method to increase the harvester's bandwidth is discussed.