带异形孔的双稳态压电能量采集器研究  

Study on Bistable Piezoelectric Energy Harvester with Shaped Hole

作　　者：周诗豪 宋芳 熊玉仲 ZHOU Shihao;SONG Fang;XIONG Yuzhong(College of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Engineering Training Center,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海201620 [2]上海工程技术大学工程实训中心,上海201620

出　　处：《压电与声光》2023年第2期283-287,共5页Piezoelectrics & Acoustooptics

摘　　要：针对传统线性压电悬臂梁能量采集器共振频率高、偏离共振频率时输出电压快速下降的问题,该文设计了一种悬臂梁基板上带异形孔的新型双稳态能量采集器。建立该能量采集器的理论模型,并制作了实验样机,研究了该能量采集器在外界不同正弦激振频率下,磁间距对其输出电压和工作频带的影响。结果表明,随着磁极对间距减小,带异形孔结构的双稳态能量采集器的双稳态效应先增强再减弱,由此确定最佳磁极对间距为12 mm,谐振频率为18 Hz,最大输出均方根电压达到12.01 V,采集器有效工作频率为15.5~22.5 Hz,工作带宽达到7 Hz,带异形孔的双稳态能量采集器具有更宽的采集频带,在低频振动环境下具有更高的输出电压响应。A new bistable energy harvester with a shaped hole in the cantilever beam substrate is designed to address the problem of high resonant frequency and rapid decrease in output voltage when deviating from the resonant frequency of the conventional linear piezoelectric cantilever beam energy harvester.The theoretical model of this energy harvester is established,an experimental prototype is fabricated,and the effect of magnetic spacing on the output voltage and operating band of the energy harvester under different external sinusoidal excitation frequencies is studied.The results show that the bistable effect of the bistable energy harvester with a shaped hole structure is enhanced and then weakened as the pole pair spacing decreases.From this,it is determined that the optimal pole pair spacing is 12 mm,the resonant frequency is 18 Hz,the maximum output root-mean-square(RMS)voltage reaches 12.01 V,the effective operating frequency of the harvester ranges from 15.5 Hz to 22.5 Hz,and the operating bandwidth reaches 7 Hz.The bistable energy harvester with shaped hole has a wider acquisition band and a higher output voltage response under the low-frequency vibration environments.

关 键 词：非线性磁力 双稳态 共振频率 压电能量采集器 异形孔 

分 类 号：TN384[电子电信—物理电子学] TM22[一般工业技术—材料科学与工程]