Vertical series connection arrangement type piezoelectric energy harvester for improving coupling effect

Abstract

The invention relates to a vertical series connection arrangement type piezoelectric energy harvester for improving a coupling effect, belongs to the technical field of water flow and air flow inducedvibration energy harvesting, and aims to solve the problems of mutual interference due to phase changes during vibration of vibrators, small vibration amplitude of traditional piezoelectric plates and low energy harvesting efficiency in a traditional parallel / series connection arrangement mode. One end of a horizontal piezoelectric cantilever beam is connected with the top end of a fixed supportbase through a horizontal clamp set, and the other end of the horizontal piezoelectric cantilever beam is connected with a horizontal turbulent column; and one end of a vertical piezoelectric cantilever beam is connected with the horizontal turbulent column through a vertical clamp set, and the other end of the vertical piezoelectric cantilever beam is connected with a vertical turbulent column. According to the vertical series connection arrangement type piezoelectric energy harvester for improving the coupling effect, the vibrators of the piezoelectric energy harvester are in a vertical series connection arrangement mode, and motion states of the vibrators do not interfere mutually, so that the energy harvesting efficiency is improved; and the piezoelectric energy harvester has the advantages of simple excitation mode, high energy harvesting efficiency, novel structure, flexible design and serialized production.

Description

technical field [0001] The invention relates to a piezoelectric energy harvester, in particular to a vertically serially arranged piezoelectric energy harvester with increased coupling effect, and belongs to the technical field of vibration energy harvesting caused by water flow and air flow. Background technique [0002] Flow-induced vibration energy capture is a technology that uses the vortex induced force generated by the alternately shedding vortices to excite the vibration of the energy-harvesting vibrator when the water flow or air flow passes through the non-streamlined object, thereby generating electric energy. [0003] Most of the flow-induced vibration energy harvesters in the prior art are single or double energy harvesters with piezoelectric sheets arranged in parallel, and the arrangement form is single. Studies have shown that vertically arranged piezoelectric energy harvesters can not only effectively use the space length, but also the motion states of the v...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a piezoelectric energy harvester arranged in vertical series with increased coupling effect to solve the problem of mutual interference due to phase changes in the traditional parallel series arrangement and the traditional piezoelectric sheet The problem of small vibration amplitude and low energy capture efficiency

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