传感技术学报2024，Vol.37Issue(4)：551-557,7.DOI:10.3969/j.issn.1004-1699.2024.04.001
螺旋形压电悬臂梁多方向振动能量采集器设计及性能分析
Design and Performance Analysis of a Multi-Directional Vibration Energy Harvester Based on Spiral Piezoelectric Cantilever Beam
摘要
Abstract
To adapt to multi-directional excitation input from vibration environment,a multi-directional vibration energy harvester is pro-posed based on spiral piezoelectric cantilever beams.The harvester is a bidirectional coupling vibration energy harvester composed of four-spiral piezoelectric beams,which are made by pasting polyvinylidene fluoride(PVDF)on a red copper basal layer.The vibration characteristics and energy harvesting performance of the single-and four-spiral piezoelectric beam structures are analyzed with the finite element simulation and experiments.The effects of shape parameters and lumped mass of the spiral structure on its natural frequency and load resistance on its output power are studied.Moreover,the open-circuit output voltage and power under different loads are ex-plored.The results show that the radius,radial pitch,weight and thickness have great effects on the natural frequency of the single-spiral piezoelectric beam.By adding 5 g and 10 g lumped masses,the first natural frequency changes from 29 Hz to 22 Hz and 18 Hz respec-tively compared with that of the non-lumped mass.The best external resistance,the peak voltage and the power are 1×107 Ω,12 V and 7 μW,respectively.For the multi-directional vibration energy harvester having four-spiral piezoelectric beams,the results show that the output voltage is up to 17 V when the amplitude of the exciter is 5 m/s2,which has a good multi-directional energy harvesting perform-ance from low-frequency vibration.关键词
振动能量采集/螺旋压电梁/多方向/低频振动/固有频率Key words
vibration energy harvesting/spiral piezoelectric beam/multi-direction/lower-frequency vibration/natural frequency分类
数理科学引用本文复制引用
曹东兴,詹昌海,李莎莎,毛佳佳..螺旋形压电悬臂梁多方向振动能量采集器设计及性能分析[J].传感技术学报,2024,37(4):551-557,7.基金项目
国家自然科学基金项目(11972051,11672008) （11972051,11672008）
北京工业大学国际科研合作种子基金项目(2021A08) （2021A08）
