摘要
为了对环境中的低频声能量进行高效回收,提出了一种基于Helmholtz共鸣器、压电单晶片以及接口电路的压电式微型俘能器。通过理论分析了俘能器的最佳工作频率,通过实验对理论分析结果进行了验证,并且研究了声源在不同距离下,俘能器的输出特性。实验结果表明:当俘能器在共振频率下工作时,在距离声源0.1 m,声压级为110 dB,负载值为48 kΩ时,最大输出功率高达24 mW;当距离从1 m增加至4 m时,输出功率从1.17 mW降低至0.38 mW,俘能器在距离较远的情况下仍能够提供足够的功率为微电子器件进行远距离独立供能。
In order to efficiently recycle low frequency acoustic energy in environment,a piezoelectric micro energy harvester based on Helmholtz resonator,piezoelectric single wafer and interface circuit is proposed.The optimal working frequency of the energy harvester is analyzed theoretically,the theoretical analysis results are verified by experiments,and the output characteristics of the energy harvester at different distances of sound source are studied.The experimental results show that when the energy harvester works at resonant frequency,the maximum output power is as high as 24 mW when the distance from the sound source is 0.1 m,the sound pressure level is 110 dB and the load value is 48 kΩ.When the distance increases from 1m to 4 m,the output power decreases from 1.17 mW to 0.38 mW.The energy harvester can still provide enough power to power microelectronic devices at a long distance.
作者
顾聪
陈远晟
王浩
陈威
GU Cong;CHEN Yuansheng;WANG Hao;CHEN Wei(School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《传感器与微系统》
CSCD
北大核心
2022年第6期45-47,共3页
Transducer and Microsystem Technologies
基金
国家自然科学基金资助项目(51775267)
国防基础加强项目(2017-JCJQ-ZD-006)
江苏省自然科学基金资助项目(BK20181286)。
