Saw-tooth type piezoelectric multi-modal energy harvester
作者： Dalius Mažeika , Andrius Čeponis , Piotr Vasiljev , Sergejus Borodinas , Birutė Pliuskuvienė
DOI: 10.1016/J.SNA.2019.02.009
关键词:
摘要: Abstract The paper presents results of numerical and experimental investigations a new design piezoelectric energy harvester based on saw-tooth type cantilever array. proposed has multi-modal operation principle allows to harvest mechanical vibrations in narrow frequency range. Moreover, the enable summation bending strains several cantilevers improve efficiency harvester. consist four that are connected rigidly each other at 30° angles. Cross-sections were modified by cylindrical gaps order increase strain. Seismic masses placed corner reduce values natural frequencies create additional rotation moment. Numerical investigation revealed five resonance range from 20 Hz 135 Hz. electrical characteristics showed voltage density 48.39mV/mm3 61.25μJ/mm3 was obtained. Experimental confirmed densities reached 55.65mV/mm3and 52.56μJ/mm3, respectively.
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