Haifeng LÜ, Hanhai YU, Junjie YE, et al. Design and performance of metamaterials for acoustic⁃electric energy conversion[J]. Journal of Aerospace Power, 2022, 37(1): 87-94.
DOI:
Haifeng LÜ, Hanhai YU, Junjie YE, et al. Design and performance of metamaterials for acoustic⁃electric energy conversion[J]. Journal of Aerospace Power, 2022, 37(1): 87-94.DOI: 10.13224/j.cnki.jasp.20210064.
Design and performance of metamaterials for acoustic⁃electric energy conversion
A metamaterial structure for acoustic⁃electric energy conversation and circuit system combining Helmholtz resonance effect and piezoelectric effect was designed,and the energy band structure of the metamaterial was analyzed by the transfer matrix method.The piezoelectric sheet was used as the Helmholtz resonator substrate to form a metamaterial structure through an array.When the incident noise frequency was consistent with the resonance frequency,the acoustic⁃electric conversion efficiency was the highest.Using COMSOL to simulate the metamaterial unit and the system respectively,the effect of the metamaterial unit on noise suppression was verified.The influence of the series⁃parallel mode of the metamaterial unit on the efficiency of acoustic⁃electric conversion was studied.A rectifier bridge was used to design an alternating current/direct current converter,and super capacitor was adopted to design the energy storage circuit.The test results showed that the optimal direct current load of the designed metamaterials system for acoustic⁃electric energy conversion was 250 kΩ.With the incident driving of the sound wave at the resonance frequency,the maximum acoustic⁃electric power of the system was 1 523 μW,which realized the energy conversion,conditioning and energy storage of acoustic⁃electric.
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