Multi-piezoelectric-beam-family composite vibration energy collector

Abstract

The invention discloses a multi-piezoelectric-beam-family composite vibration energy collector. A first collection circuit in the multi-piezoelectric-beam-family composite vibration energy collector comprises a double-span piezoelectric straight beam. The double-span piezoelectric straight beam comprises a first hinge support set, a first substructure layer and a first piezoelectric crystal layer.A second acquisition circuit comprises a double-span piezoelectric curved beam; the double-span piezoelectric curved beam comprises a second hinge support group, a first span structure and a second span structure; the first span structure comprises a second substructure layer and a second piezoelectric crystal layer; the second span structure comprises a third substructure layer and a third piezoelectric crystal layer; a third acquisition circuit comprises a plurality of single-span piezoelectric curved beams which are connected in parallel; each single-span piezoelectric curved beam comprises a third hinge support group, a fourth substructure layer and a fourth piezoelectric crystal layer; when the hinge support set vibrates, the piezoelectric crystal layer deforms, and therefore electric energy is generated. According to the invention, broadband energy collection from low frequency to high frequency can be realized, and the energy collection efficiency in each frequency band is improved.

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...

AI Technical Summary

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

Images