A Multi-Piezoelectric Beam Family Composite Vibration Energy Harvester

Abstract

The invention discloses a multi-piezoelectric beam family composite vibration energy collector. The first collection circuit in the multi-piezoelectric beam family composite vibration energy harvester includes a double-span piezoelectric straight beam; the double-span piezoelectric straight beam includes a first hinge support group, a first substructure layer and a first piezoelectric crystal layer; the second acquisition circuit includes a double-span piezoelectric curved beam; the double-span piezoelectric curved beam includes a second hinge support group, a first span structure, and a second span structure; the first span structure includes a second substructure layer and a second substructure layer Two piezoelectric crystal layers; the second span structure includes a third substructure layer and a third piezoelectric crystal layer; the third acquisition circuit includes a plurality of parallel single-span piezoelectric curved beams; the single-span piezoelectric curved beam includes a third hinge A support group, a fourth substructure layer, and a fourth piezoelectric crystal layer; when the hinged support group vibrates, the piezoelectric crystal layer deforms, thereby generating electrical energy. The invention can realize broadband energy collection from low frequency to high frequency, and improves energy collection efficiency in each frequency band.

Description

technical field [0001] The invention relates to the field of energy technology, in particular to a multi-piezoelectric beam family composite vibration energy harvester. Background technique [0002] As the energy crisis intensifies, the search for green energy has become a current hot spot. Among them, vibration energy widely exists in the natural environment, and the use of piezoelectric materials to obtain energy from vibration motion is an important substitute for batteries or other energy sources, which can provide power for electronic equipment or other devices. Compared with solar or wind energy, the energy obtained from mechanical vibration is not affected by factors such as weather, and the power output is more stable, so it has received extensive research. [0003] Existing energy harvesters only have high collection efficiency near the resonant frequency. Once the frequency of the external environment changes, its efficiency will be greatly affected. The existing...

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Problems solved by technology

[0003] Existing energy harvesters only have high collection efficiency near the resonance frequency. Once the frequency of the external environment changes, its efficiency will be greatly affected.

Existing energy harvesters have the problem of being unable to obtain stable voltage from low frequency to high frequency, and the energy harvesting efficiency is low

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