Broadband piezoelectric generating device

Abstract

The invention discloses a broadband piezoelectric generating device. A plurality of cantilever plates with two sides stuck with a plurality of piezoelectric elements are combined together; one end of each cantilever plate is fixed and the other end of each cantilever plate is free; and the different cantilever plates are kept in parallel. As the structural sizes of the cantilever plates are different, the bending resonance frequencies of the cantilever plates are also different. The combined type piezoelectric generating device can convert the mechanical vibration energy of a certain frequency range of an environment into electric energy so as to realize broadband power generating; and as the energy of the plurality of piezoelectric elements is collected, the power generating capacity is larger and the power generating efficiency is higher.

Description

technical field [0001] The present invention relates to a broadband piezoelectric power generation device, a device that converts vibrational mechanical energy of the environment into electrical energy. Background technique [0002] The piezoelectric generator can convert the vibrating mechanical energy of the surrounding environment or the human body into electrical energy to supply power for electronic equipment, so that the electronic equipment does not need to be frequently replaced or recharged, which improves the maintenance-free nature of the electronic equipment. Its typical applications include providing power for wireless electronic devices such as wireless sensors or wireless sensor networks, or mobile electronic devices, and has important application values ​​in both national defense and civilian fields. [0003] The working principle of piezoelectric power generation is based on the positive piezoelectric effect, which converts the vibration mechanical energy of...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of high operating frequency and easy fracture and damage of the piezoelectric cantilever beam in the current bending piezoelectric power generation device, and propose a combined piezoelectric power generation device, which uses multiple piezoelectric elements pasted on both sides The cantilever plate is used for broadband piezoelectric power generation, which converts the vibration mechanical energy of the natural environment or the human body into electrical energy, with large power generation, high power generation efficiency and long service life

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