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

Aichao Yang; Ping Li; Yumei WenCaijiang LuXiao PengWei HeJitao ZhangDecai WangFeng Yang

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

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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 μW cm~(-3) volume power density at 170-206 Hz.

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来源
《Review of Scientific Instruments》 |2014年第6期|066103-1-066103-3|共3页
作者
Aichao Yang; Ping Li; Yumei WenCaijiang LuXiao PengWei HeJitao ZhangDecai WangFeng Yang;
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作者单位

Research Center of Sensors and Instruments, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China;

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正文语种英语
中图分类仪器、仪表;
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Note: High-efficiency broadband acoustic energy harvesting using Helmholtz resonator and dual piezoelectric cantilever beams

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