Tunable Acoustic Energy Harvester using Helmholtz Resonator and Dual Piezoelectric Cantilever Beams

被引：3
|
作者：
Yang, Aichao [1 ]
Li, Ping [1 ]
Wen, Yumei [1 ]
Lu, Caijiang [1 ]
Peng, Xiao [1 ]
He, Wei [1 ]
Zhang, Jitao [1 ]
Wang, Decai [1 ]
Yang, Peng [1 ]
机构：
[1] Chongqing Univ, Coll Optoelect Engn, Res Ctr Sensors & Instruments, Chongqing 400044, Peoples R China
来源：
2014 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS) | 2014年
关键词：
tunable acoustic energy harvester; Helmholtz resonator; dual piezoelectric cantilever beams;
D O I：
10.1109/ULTSYM.2014.0622
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
A tunable acoustic energy harvester consisting of dual piezoelectric cantilever beams and a Helmholtz resonator with a perforated backplate is proposed. The tunability of the operation frequency band can be achieved not only via simply adjusting the radius (r) of the aperture due to the strong dependence of resonance frequencies of the Helmholtz resonator on the acoustic impedance affected by r, but also by changing the distance (d) between piezoelectric cantilever beams because of their magnetic force interaction. Experimental results show that as r (or d) increases from 0 (or 1.4) to 1.0 (or 3.4) cm, the frequency band is broadened and varies from 175.5 similar to 198 (or 175.5 similar to 213) Hz to 170.5 similar to 221 (or 161 similar to 203) Hz. The average ratio of the adjusted frequency bandwidth to r (or d) can reach 28 (or 2.25) Hz/cm over the range of 125 similar to 250 Hz.
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页码：2494 / 2497
页数：4
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