A wind-induced vibration broadband piezoelectric power generation device

Abstract

The invention discloses a wind-induced vibration broadband piezoelectric power generator, which comprises a fan, a fixed support, a rotating permanent magnet, a rotating shaft, a fixed permanent magnet, springs, a supporting frame and at least two piezoelectric generation beams, wherein the rotating permanent magnet and the fan are fixed to the same rotating shaft; the supporting frame is fixed to the fixed support through four same springs; one end of each piezoelectric generation beam is fixed to the supporting frame; the fixed permanent magnet is fixed to the lower end of the supporting frame; each piezoelectric generation beam consists of a metal mass block, an elastic sheet metal, an upper piezoelectric plate and a lower piezoelectric plate; each metal mass block is fixed to the free end of the corresponding elastic sheet metal; the upper and lower piezoelectric plates are respectively adhered to the upper and lower surfaces of the elastic sheet metals. By the wind-induced vibration broadband piezoelectric power generator, wind energy in the external environment is converted into mechanical vibration energy, electric energy is generated, the work of the piezoelectric power generator is not limited by a mechanical vibration source, and the piezoelectric power generator is convenient to use and high in expansibility.

Description

Technical field [0001] The invention belongs to the technical field of new energy sources and electronics, and particularly relates to a wind-induced vibration broadband piezoelectric power generation device. Background technique [0002] In recent years, with the rapid development of society and economy, the demand for energy has increased sharply. Environmental pollution and energy shortage have become a common problem that plagues all countries in the world. The resulting environmental degradation and energy crisis have gradually begun to affect economic development and People live. Under this pressure, scientific and technological workers from various countries have begun to explore the search and development of new energy sources, such as solar energy, wind energy, wave energy, and vibration energy. Among them, the piezoelectric power generation device is a new type of micro power generation device. In theory, its power supply life depends only on the life of the components...

AI Technical Summary

Problems solved by technology

[0004] Therefore someone designs such as patent document CN201310357008.9 attached figure 1 The described device is driven by the wind to rotate the piezoelectric generator charger, which makes full use of the low-speed wind energy in the environment to permanently supply power to the wireless sensor nodes. Although this structure uses a non-contact magnetic excitation method to convert the wind energy, the patent and other The patented electromagnetic force acts directly on the end of the piezoelectric cantilever beam. The distance between the permanent magnet at the end of the cantilever beam and the permanent magnet on the turntable needs to be accurately calculated. Embrittlement occurs, that is, the deformation of the piezoelectric cantilever is not easy to control

In addition, the number of cantilever beams set in this patent is limited to some extent, because the dense distribution of piezoelectric cantilever beams will cause the cantilever beams to interact due to the permanent magnets at the ends of the cantilever beams.

Furthermore, due to the limitation of the design structure, the expansion of the patent structure is limited, which brings difficulties to the subsequent improved design of the patent

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