Low-Frequency Broadband Piezoelectric Vibration Energy Harvester Based on Double L-shaped Beam Structures

Huang, Shifan; Dong, Guobao; Zhou, Maoying

doi:10.1007/s42417-022-00549-1

Cited by 8 publications

(2 citation statements)

References 42 publications

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“…According to Table 2 , it can be seen that current low-frequency energy harvesters generally have the problem of low output power density such as the harvester proposed by Wang et al [ 40 ] and Wang et al [ 41 ]. While the PEH [ 42 ] could generate ideal power density, its structure is quite complex, and it is difficult to use for forming arrays. And only one beam of the multi-frequency energy harvester [ 42 ] vibrates at its resonant frequency because it lacks the coupling between beams.…”

Section: Resultsmentioning

confidence: 99%

“…While the PEH [ 42 ] could generate ideal power density, its structure is quite complex, and it is difficult to use for forming arrays. And only one beam of the multi-frequency energy harvester [ 42 ] vibrates at its resonant frequency because it lacks the coupling between beams. Therefore, a kind of low-frequency multi-frequency PEHs which could output high power density and have compact and stable construction is desperately needed.…”

Section: Resultsmentioning

confidence: 99%

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A Novel Bird-Shape Broadband Piezoelectric Energy Harvester for Low Frequency Vibrations

et al. 2023

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This work presents a novel bird-shaped broadband piezoelectric energy harvester based on a two-DOF crossed beam for low-frequency environmental vibrations. The harvester features a cantilever mounted on a double-hinged beam, whose rotating motions effectively diminish its natural frequencies. Numerical simulation based on the finite element method is conducted to analyze the modal shapes and the harmonic response of the proposed harvester. Prototypes are fabricated and experiments are carried out by a testing system, whose results indicate a good agreement with the simulation. The multi-frequency energy harvesting is achieved at the first-, second-, and fifth-order resonances. In particular, the proposed harvester demonstrates the remarkable output characteristics of 9.53 mW and 1.83 mW at frequencies as low as 19.23 HZ and 45.38 Hz, which are superior to the majority of existing energy harvesters. Besides, the influences of key parameters on the harvesting performance are experimentally investigated to optimize the environmental adaptability of the harvester. This work provides a new perspective for efficiently harvesting the low-frequency vibration energy, which can be utilized for supplying power to electronic devices.

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