Note: High-efficiency broadband acoustic energy harvesting using Helmholtz resonator and dual piezoelectric cantilever beams

被引：47
|
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, Feng [1 ]
机构：
[1] Chongqing Univ, Coll Optoelect Engn, Res Ctr Sensors & Instruments, Chongqing 400044, Peoples R China
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2014年 / 85卷 / 06期
基金：
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词：
D O I：
10.1063/1.4882316
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A high-efficiency broadband acoustic energy harvester consisting of a compliant-top-plate Helmholtz resonator (HR) and dual piezoelectric cantilever beams is proposed. Due to the high mechanical quality factor of beams and the strong multimode coupling of HR cavity, top plate and beams, the high efficiency in a broad bandwidth is obtained. Experiment exhibits that the proposed harvester at 170-206 Hz has 28-188 times higher efficiency than the conventional harvester using a HR with a piezoelectric composite diaphragm. For input acoustic pressure of 2.0 Pa, the proposed harvester exhibits 0.137-1.43 mW output power corresponding to 0.035-0.36 mu Wcm(-3) volume power density at 170-206 Hz. (C) 2014 AIP Publishing LLC.
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页数：3
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