Dual-beam mutually excited multistable frequency-raising vibration energy collecting device

Abstract

The invention discloses a dual-beam mutually excited multistable frequency-raising vibration energy collecting device, which comprises a shell, a driving cantilever beam I, a driving cantilever beam II and two high-frequency piezoelectric cantilever beams, wherein one end of the driving cantilever beam I is open, the driving cantilever beam I is provided with a through slot used for accommodatingthe driving cantilever beam II in a mode of extending from the open end to the other end, the open end of the driving cantilever beam I is fastened on the shell, and the other end is fixedly providedwith a counterweight block and a rubidium ferrum boron permanent magnet I; the driving cantilever beam II is located inside the through slot of the driving cantilever beam I, one end of the driving cantilever beam II is fastened on the shell, and the other end is fixedly provided with a counterweight block and a rubidium ferrum boron permanent magnet II; the two high-frequency piezoelectric cantilever beams are symmetrically arranged at two sides of a neutral surface of the driving cantilever beam I and are fixed through the shell; and a rubidium ferrum boron permanent magnet III is fixed on the shell in the extending direction of the outer end of the driving cantilever beam I. According to the invention, a cantilever beam vibrator can be avoided from being caught in a certain outer potential well to result in failure of the vibration energy collecting device through mutual excitation of the two driving cantilever beams.

Description

technical field [0001] The invention belongs to the technical field of vibration energy collection, and in particular relates to a double-beam mutual excitation broadband multi-stable up-frequency vibration energy collector. Background technique [0002] At present, most of the known broadband multi-stable up-frequency piezoelectric vibration energy harvesters use a low-frequency vibrator to couple the vibration in the environment, and then transfer the kinetic energy of the low-frequency vibrator to the piezoelectric single chip with high natural frequency through collision or magnetic force. The cantilever beam, in turn, generates electricity through electromechanical coupling. The multi-stable characteristics of the collector mainly depend on the external magnetic field. When the steady-state number reaches three or more, at least two external independent magnets are required to form the desired magnetic field. From the perspective of the form of system potential energy...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the hindrance effect of the outer potential well on the low-frequency resonance of the existing broadband multi-stable up-frequency vibration energy harvester, improve the defects of complicated magnetic field setting, low utilization rate, and inability to further miniaturize, and further improve the performance of the harvester in small excitation Under the output effect, the present invention provides a dual-beam mutual excitation broadband multi-stable up-frequency vibration energy harvester, which can prevent the cantilever beam oscillator from falling into a certain outer potential well through the mutual excitation of two driving cantilever beams The failure phenomenon of vibration energy harvester caused by

Images