Optics and Precision Engineering, Volume. 31, Issue 3, 371(2023)
Piezoelectric vibration harvester with excitation direction conversion
Figures & Tables(15)
Fig. 1. Schematic illustration of Piezoelectric Vibration Harvester with Excitation Direction Conversion， （PVHEDC）
Fig. 3. Amplitude ratio of harvester versus excitation frequency under different elastic beam lengths
Fig. 4. The amplitude ratio versus excitation frequency under different proof mass
Fig. 5. Schematic diagram of harvester prototype and experimental setup
Fig. 6. Generator voltage versus excitation frequency under different excitation amplitudes
Fig. 7. Generator voltage of PVHEDC under different excitation amplitudes
Fig. 8. Generator voltage versus excitation frequency under different elastic beam lengths
Fig. 9. Resonant frequency versus generator voltage under different elastic beam lengths
Fig. 10. Generator voltage versus excitation frequency under different proof mass
Fig. 11. Generator voltage versus excitation frequency under different proof mass
Fig. 12. Output power of PVHEDC versus load resistance under different proof wass
Table 1. Related parameters for harvester simulation
View tableView in ArticleTable 1. Related parameters for harvester simulation
参 数 值 拾振器尺寸l1×a1×b1/（mm×mm×mm）
换能簧片尺寸l2×a2×b2/（mm×mm×mm）
50×20×0.2
70×20×0.3
拾振器等效质量M1/g
换能器等效质量M2/g
13+m1
20+m2
拾振器等效阻尼C1 0.17 换能器等效阻尼C2 0.24 夹持长度p/mm 30 压电振子刚度/（N·m-1） 356 拾振/换能簧片杨氏模量E/Pa 1.28×1011 激励振幅Z0/mm 1 磁铁轴向距离Lx/mm 5 磁铁径向距离Ly，Lz/mm 0 俘能质量m1/g 0~20 换能质量m2/g 20
Table 2. Related parameters for piezoelectric vibrator and magnet
View tableView in ArticleTable 2. Related parameters for piezoelectric vibrator and magnet
参 数 值 压电陶瓷材料 PZT-4 基板材料 铍青铜 压电振子尺寸lp×ap×bp/mm3 40×30×0.6 压电陶瓷尺寸lk×ak×bk/mm3 24×30×0.3 基板尺寸lp×ap×bm/mm3 40×30×0.3 压电振子刚度/（N·m-1） 356 磁铁直径φ/mm 20 磁铁厚度h/mm 3 磁铁轴向间距Lx/mm 15 磁铁安装方式 同极对心安装
Table 3. Performances of some piezoelectric harvesters
View tableView in ArticleTable 3. Performances of some piezoelectric harvesters
年 份 参考文献 谐振频率/Hz 最大电压/V 最大功率/μW 2017 Zou［ 22 ］et al17 - 220 2018 刘星［ 13 ］等66.5 11.6 13.5 2019 Fu［ 23 ］et al10 - 52 2020 M Febbo1［ 24 ］- 4 180 2021 马天兵［ 25 ］46 13.8 701 2022 Qi Liu［ 26 ］- 35.5 115 2023 PVHEDC 9~13 34.8 400
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Junwu KAN, Kai WANG, Fanxu MENG, Xiang FEI, Zhonghua ZHANG, Shijie ZHAI, Mengsong ZHU. Piezoelectric vibration harvester with excitation direction conversion[J]. Optics and Precision Engineering, 2023, 31(3): 371
Paper Information
Category: Micro/Nano Technology and Fine Mechanics
Received: Jun. 20, 2022
Accepted: --
Published Online: Mar. 7, 2023
The Author Email: MENG Fanxu (mfx_412@163.com)
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