Stepless continuous tuning piezoelectric low amplitude vibration energy harvester

Abstract

The invention specifically relates to a stepless continuous tuning piezoelectric low amplitude vibration energy harvester. The stepless continuous tuning piezoelectric low amplitude vibration energy harvester comprises a clamping device, a piezoelectric beam, a liquid mass block and a packaging shell, wherein the clamping device is movably connected to the top and the bottom of the piezoelectric beam, and is connected to the left side of the inner cavity of the packaging shell through bolts; and the liquid mass block is adhered to the bottom of the right end of a uniform beam through conductive glue water, and is mounted at the bottom of the inner cavity of the packaging shell; the piezoelectric beam comprises the uniform beam and a piezoelectric plate, and the clamping device comprises aconnecting leg block, a distance adjusting clamping block, an upper clamping block, a lower clamping block and bolts. A traditional concentrated mass block is replaced by the liquid mass block, and efficient collection of vibration energy in a low frequency range is realized; through stepless continuous control for liquid mass inside the liquid mass block, the resonant frequency of the stepless continuous tuning energy harvester can be realized; and the stepless continuous tuning energy harvester consists of four parts such as the clamping device, the piezoelectric beam, the liquid mass blockand the packaging shell, the structure of each part is relatively simple, and the integral structure is convenient to mount.

Description

technical field [0001] The invention specifically relates to a stepless continuous tuning piezoelectric low-amplitude vibration energy harvester, which belongs to the technical field of piezoelectric vibration energy harvesting and new energy development. Background technique [0002] The rapid development of passive power supply technology has promoted the development of low-power microelectronic products. The research on micro-power and magnetic excitation based on environmental vibration energy has gradually become a hot spot in the development of new micro-power energy. In view of the fact that vibration energy exists widely in daily life and engineering practice, and is not easily affected by factors such as geography and weather, vibration energy harvesting technology has attracted strong attention from researchers. By capturing the vibration energy in the environment to provide electric energy for low-power microelectronics, it can effectively solve the problems of lo...

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Problems solved by technology

[0004] In view of the above problems, the purpose of the present invention is to provide a stepless continuous tuning piezoelectric low-amplitude vibration energy harvester, which has the advantages of stepless continuous adjustment of the resonance frequency of the energy harvester and high efficiency of low-amplitude vibration energy collection, and solves the existing problems. It is difficult to continuously adjust the resonant frequency of the energy harvester and the energy harvesting efficiency of low-amplitude vibration is low in the existing vibration energy harvester.

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