Complementary six-stage arc type piezoelectric energy harvester

Abstract

The invention discloses a complementary six-stage arc type piezoelectric energy harvester which comprises a first group of cantilever beams and a second group of cantilever beams symmetric with each other. The first group of cantilever beams and the second group of cantilever beams are connected by a fixed mass block. The first group of cantilever beams includes a first cantilever beam, a second cantilever beam and a third cantilever beam which are sequentially arranged, the left ends of the first cantilever beam, the second cantilever beam and the third cantilever beam are connected to an adjustable mass block, and the right ends of the first cantilever beam, the second cantilever beam and the third cantilever beam are connected to a fixed mass block. The complementary six-stage arc typepiezoelectric energy harvester is formed by the symmetrical cascaded connection of six piezoelectric layers, compared with a traditional piezoelectric energy harvester, when the excitation acts on themass block, the arc type piezoelectric energy harvester with a specific curvature can generate higher power energy, at the same time, the space utilization of the device can be improved by the piezoelectric energy harvester, the integration is improved, the stability is enhanced, and the piezoelectric energy harvester has a high research value.

Description

technical field [0001] The invention relates to a complementary six-stage arc piezoelectric energy harvester, which belongs to the technical field of energy collection. Background technique [0002] The piezoelectric energy harvester uses the piezoelectric effect to convert the mechanical energy that cannot be directly used in the surrounding environment into electrical energy that can be directly used. At present, the commonly used piezoelectric energy harvesters are usually straight structures. Although they can play the role of energy harvesting under this structure, experiments have shown that the frequency range of the energy that can be collected is small, and the output potential is low. In addition, piezoelectric energy harvesters with straight structures have a series of defects such as low stability and low space utilization. The two-degree-of-freedom arc piezoelectric energy harvester is applied to the top or side of the mass block through external vibration, the...

AI Technical Summary

Problems solved by technology

Although the third-order intelligent arc-shaped piezoelectric energy harvester retains the advantages of the high-performance arc-shaped piezoelectric energy harvester and the two-degree-of-freedom arc-shaped piezoelectric energy harvester that can absorb vibration energy in the top and side directions, At the same time, the energy collection range and output potential have been improved to a certain extent, but while realizing energy absorption on both the top surface and the side surface, the arc-shaped piezoelectric layers cannot be symmetrically cascaded to further improve the working frequency band of the energy harvester. width, output potential, device stability

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