Third-order intelligent arc-shaped piezoelectric energy harvester

Abstract

The invention discloses a third-order intelligent arc-shaped piezoelectric energy harvester which comprises three cantilever beams. A first cantilever beam, a second cantilever beam and a third cantilever beam are in a sequential sleeve arrangement. The radius of the first cantilever beam is R1, the radius of the second cantilever beam is R2, the radius of the third cantilever beam is R3, the radius R1 of the first cantilever beam is smaller than the radius R2 of the second cantilever beam, and the radius R2 of the second cantilever beam is smaller than the radius R3 of the third cantilever beam. Left ends of the first cantilever beam, the second cantilever beam and the third cantilever beam are connected to a fixed mass block, and right ends of the first cantilever beam, the second cantilever beam and the third cantilever beam are connected to a metal fixed end. The third-order intelligent arc-shaped piezoelectric energy harvester of the technical scheme can carry out multi-dimensional adjustment of energy absorption in a specific structure, and while the vibration energy absorption in a large frequency range is achieved, the frequency can be controlled to a point to output high power.

Description

technical field [0001] The invention relates to a third-order intelligent arc type 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...

AI Technical Summary

Problems solved by technology

The two-degree-of-freedom arc-type piezoelectric energy harvester generates a high electric potential under a certain arc, the first-order frequency is small, and the multi-order bandwidth is short, but both solve the singleness of the energy absorption direction, and can absorb the top surface of the mass block and Vibration energy in the side direction, but the structure of the above two is complex and difficult to process, it is not easy to integrate MEMS, and it cannot have the advantages of high performance and dual-degree-of-freedom technology at the same time

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