| 罗莲健,赵文浩,宋汝君,常文艳,王郭泰.T型磁力耦合压电俘能器发电性能研究[J].电子测量与仪器学报,2024,38(7):217-223 |
| T型磁力耦合压电俘能器发电性能研究 |
| Research on power generation performance of T-type magnetically coupled piezoelectric energy harvester |
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| DOI： |
| 中文关键词: 磁力耦合 弯-扭耦合振动 压电俘能 低频 |
| 英文关键词:magnetic coupling bend-torsion coupling vibration piezoelectric energy harvesting low frequency |
| 基金项目:山东省自然科学基金(ZR2022ME053)、山东省高等学校青年创新团队发展计划项目(2022KJ234)资助 |
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| Author | Institution |
| Luo Lianjian | School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China |
| Zhao Wenhao | Zibo Yuhai Electronic Ceramics Co., Ltd, Zibo 255200, China |
| Song Rujun | School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China |
| Chang Wenyan | School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China |
| Wang Guotai | School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China |
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| 中文摘要: |
| 针对传统压电俘能器存在共振频率高、输出功率低的问题，提出了一种T型磁力耦合压电俘能器。通过引入两侧互异的磁力耦合作用使压电梁产生弯 扭振动，以增加压电梁的形变量，进而提高俘能器输出电压响应。首先分析了该压电俘能器的工作原理及结构设计，并对其振动特性进行仿真分析，最后，制作试验样机进行实验测试，通过仿真分析与实验测试验证了该压电俘能器的有效性。结果表明，存在最优负载电阻使压电俘能器输出功率最大。调整装置自由端质量块质量可对俘能频率进行控制，增大激励加速度能显著提高俘能器输出功率。引入磁力耦合，并通过对比实验分析了磁力耦合引起的弯-扭复合运动对俘能器输出性能的影响，当激励加速度为0.2 g时，磁力耦合装置Ⅲ由于发生弯扭复合振动，其工作频率与最大输出功率分别为5.5 Hz和3.71 mW。相比无磁力耦合的俘能装置Ⅰ，输出功率提高了约47%，因此，该T型磁力耦合压电俘能器在低频环境下具有较高输出效率。 |
| 英文摘要: |
| In order to solve the problems of high resonance frequency and low output power of traditional piezoelectric energy harvesters, a T-type magnetically coupled piezoelectric energy harvester was proposed. By introducing the magnetically coupled interaction between the two sides, the piezoelectric beam is induced to generate bending-torsional vibration, which increases the deformation of the piezoelectric beam, and further enhances the output voltage response of the harvester. Firstly, the working principle and structural design of the piezoelectric energy harvester were analyzed, and its vibration characteristics were simulated and analyzed, and finally, the experimental prototype was made for experimental testing, and the effectiveness of the piezoelectric energy harvester was verified by simulation analysis and experimental tests. The results show that the optimal load resistance maximizes the output power. The energy harvesting frequency can be controlled by adjusting the weight of the mass at the free end of the device, and the output power improves with the increase of excitation acceleration. Introducing magnetic coupling, the influence of the bending-torsional coupling vibration caused by magnetic coupling on the output performance of the harvester was analyzed through comparative experiments. When the excitation acceleration is 0.2 g, Due to the bending-torsion complex vibration, the working frequency and maximum output power of the magnetic coupling device Ⅲ are 5.5 Hz and 3.71 mW, respectively. Compared to the energy harvesting device I, without magnetically coupled, the output power is increased by about 47%. Therefore, the T-type magnetically coupled piezoelectric energy harvester has a high output efficiency in the low-frequency environment. |
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