王晓辉, 王强, 袁明.基于赫姆霍兹共鸣器的声能回收器研究[J].压电与声光,2018,40(3):412-416.WANG Xiaohui, WANG Qiang, YUAN Ming.Study on the Acoustic Energy Harvester With Helmholtz Resonator[J].PIEZOELECTRICS AND ACOUSTOOPTICS
基于赫姆霍兹共鸣器的声能回收器研究
Study on the Acoustic Energy Harvester With Helmholtz Resonator
  
DOI:10.11977/j.issn.1004-2474.2018.03.025
中文关键词:  赫姆霍兹(Helmholtz)共鸣器  声能回收  压电圆板  半径比
英文关键词:Helmholtz resonator  acoustic energy harvesting  PZT circular plate  radius ratio
基金项目:国家自然科学基金资助项目(61701250);江苏省自然科学青年基金资助项目(BK20160895)
作者单位
王晓辉, 王强, 袁明 (南京邮电大学 自动化学院江苏 南京 210023) 
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中文摘要:
      为了对环境中声能进行高效回收,提出了一种基于赫姆霍兹(Helmholtz)共鸣器和圆形压电振子组成的声能回收器。入射声波经Helmholtz共鸣器进行放大,被放大的声波作用于圆形压电振子使其产生振动,通过压电片的压电效应将声能转换为电能。建立了圆形压电振子构成压电换能器的等效集中参数理论模型,分析了声能回收器的声能转换原理,研究了压电片半径与基底半径比对声能回收器的影响。仿真结果表明,压电片半径与金属薄片半径(声腔内径)比为0.8时,发电效果最好,在入射声压为1 Pa(94 dB),声波频率为1 188 Hz,负载电阻为3.7 kΩ时,最大输出功率为12 μW。
英文摘要:
      In order to harvest the acoustic energy effectively in the environment, an acoustic energy harvester composed of a Helmholtz resonator and the piezoelectric circular diaphragm is proposed in this paper. The incident sound wave is amplified by the Helmholtz resonator. The amplified sound wave acts on the circular piezoelectric vibrator to generate vibration and converts the sound energy into electrical energy through the piezoelectric effect of the piezoelectric plate. The equivalent lumped parameter theoretical model of piezoelectric transducer constituted by circular piezoelectric vibrator is established. The acoustic electric conversion principle of the acoustic energy harvester is analyzed and the influence of the radius ratio of the radius of piezoelectric plate to the radius of substrate on the acoustic energy harvester is studied. The simulation results show that the power generation effect is best when the radius ratio of the radius of piezoelectric plate to the radius of metal substrate (inner cavity diameter) is 0.8. The maximum output power is 12 μW at the incident sound pressure of 1 Pa(94 dB), the acoustic wave frequency of 1 188 Hz and the load resistance of 3.7 kΩ.
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