A drum-shaped piezoelectric generator

Abstract

The invention discloses a drum-type piezoelectric power generation device, which comprises an upper rigid substrate, a lower rigid substrate, a PVDF piezoelectric beam, a guide post, a spring and a guide sleeve, wherein two ends of the PVDF piezoelectric beam are fixed on the upper rigid substrate and the lower rigid substrate respectively; the guide post and the spring are fixed on the lower rigid substrate respectively; the guide sleeve is fixed on the upper rigid substrate; the PVDF piezoelectric beam comprises a plurality of portal piezoelectric beams and rigid blocks; each portal piezoelectric beam comprises an outside PVDF piezoelectric film, an arc-shaped elastic metal substrate and an inside PVDF piezoelectric film; and the adjacent portal piezoelectric beams are connected by the rigid blocks. The drum-type piezoelectric power generation device can convert alternating pressure in an external environment into bending vibration of the PVDF piezoelectric beam, so that electromechanical energy conversion of the device is achieved; and the problems that a cantilever beam type piezoelectric power generation device is low in carrying capacity and is easy to break off under the action of a high load are solved.

Description

technical field [0001] The invention relates to the fields of new energy and electronic technology, in particular to a drum-shaped piezoelectric generator. Background technique [0002] In recent years, with the rapid development of social economy, the demand for energy is increasing day by day. Environmental pollution and energy shortage have become a common problem plaguing all countries in the world, and the resulting environmental degradation and energy crisis have gradually begun to affect social and economic development. and people's daily life. Under this pressure, scientific and technological workers from various countries have begun to explore and develop new energy sources, such as solar energy, wind energy, and wave energy. As a common phenomenon in daily life, vibration has attracted more and more researchers' attention because of its high energy density and its potential energy value. At present, there are mainly three types of devices used to realize vibratio...

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Problems solved by technology

[0003] It is worth noting that the most reported cantilever beam type piezoelectric power generation device has a small load-carrying capacity, and it is easy to break under the condition of high load or strong external excitation and cannot work normally, while Cymbal structure, stacked structure, etc. Although the bearing capacity of the piezoelectric power generation device is much larger than that of the cantilever beam structure, considering that PZT piezoelectric ceramics are brittle materials, sudden high loads in the natural random vibration environment may also cause PZT voltage in the piezoelectric power generation device. Electroceramic breaks due to excessive deformation

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