Self-adaptive piezoelectric generation cantilever beam

Abstract

The invention relates to a self-adaptive piezoelectric generation cantilever beam. The self-adaptive piezoelectric generation cantilever beam comprises a piezoelectric vibrator (1), a free end mass block (2), a curved-surface fixed support end (3), an installation gasket (4) and a bolt (5), wherein the free end mass block (2) is arranged at one end of the piezoelectric vibrator (1), and the other end of the piezoelectric vibrator (1) is fixed on the curved-surface fixed support end (3), and fixed through the installation gasket (4) and by the bolt (5); the curved-surface fixed support end (3) is provided with a vibrator installation surface (31) and a variable support curved surface (32) adjacent to the vibrator installation surface (31); the vibrator installation surface (31) and the variable support curved surface (32) adjacent to the vibrator installation surface (31) are vertical to the side surface adjacent to the both. A system is installed on a rotation device and used as a generation device, and capable of realizing the self-adaptive changes of an inherent frequency according to a rotation speed, thus the inherent frequency bandwidth of a generation device is increased, and a generation amount is increased.

Description

technical field [0001] The invention belongs to the field of low-power power generation, and in particular relates to an adaptive piezoelectric power generation cantilever beam. Background technique [0002] Since the discovery of piezoelectric materials, they have been widely used in power generation devices for specific occasions, including strain test devices formed by converting stress into electrical energy, various ignition devices and electronic devices that directly generate instantaneous high voltage by impacting piezoelectric materials. Fuze devices, electronic power supply devices formed by bending piezoelectric cantilever beams formed by piezoelectric ceramics to supply various electronic devices. The piezoelectric cantilever structure, as the simplest piezoelectric power generation structure, has been widely studied and applied. The piezoelectric cantilever has two working states for power generation. One is to work at a non-resonant frequency. The deformation ...

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Problems solved by technology

[0003] In order to solve the problem of low power generation efficiency caused by the constant natural frequency of the piezoelectric cantilever beam power generation device installed on the rotating mechanism and the inability to keep the cantilever beam system in a resonant state under changing motion conditions, an automatic Adapting to the structure of the piezoelectric generating cantilever beam, the piezoelectric cantilever beam is composed of a piezoelectric vibrator, a mass block at the free end, and a fixed support end on a curved surface. The fixed support end on the curved surface of the adaptive piezoelectric generating cantilever beam structure is fixed on the In terms of mechanism, the rotary motion is used to generate power. When the rotation speed changes, the overall stiffness changes under the action of the fixed support end on the curved surface, and the resonance frequency of the system changes accordingly to make it have a wider resonance frequency range, which can improve piezoelectric power generation. efficiency

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