Bistable Spherical Composite Cantilever Piezoelectric Generating Device

Abstract

Bistable spherical composite cantilever beam piezoelectric power generation device, the device includes a beam frame and a shell; the shell is spherical, with a circular opening cut at the bottom; the beam frame and the shell are respectively fixed on the base; the beam frame The vibration of the piezoelectric cantilever will cause the deformation of the piezoelectric cantilever, and when the piezoelectric cantilever deforms, electric energy will be generated due to the piezoelectric effect; the number of the piezoelectric cantilever is twenty-five, and the layers Uniform and circular distribution; using the inherent nonlinear characteristics of the bistable piezoelectric power generation system, the piezoelectric cantilever vibrator undergoes random resonance under the joint action of environmental vibration excitation and magnetic force, with a lower resonance frequency and a larger Amplitude, so the electricity generated is relatively large. The present invention includes twenty-five piezoelectric vibrator structures, and the lengths of adjacent cantilever beams in the same plane are different to form a wider resonant frequency domain, and such a number of piezoelectric vibrator structures can significantly increase power generation.

Description

technical field [0001] The invention relates to a bistable spherical composite cantilever beam piezoelectric power generation device, which can effectively collect vibration mechanical energy in the surrounding environment for power generation, and belongs to the field of energy-saving technology and renewable environmental protection new energy. Background technique [0002] With the rapid development of microelectronics and wireless networks, it has become an urgent need to capture energy from the environment to power low-power devices or power batteries; traditional battery power supply has a series of disadvantages, such as short life, regular replacement, pollution Environment, etc.; no matter which one of the drawbacks will seriously affect the development of microelectronics technology; therefore, it is necessary to use energy generated by environmental vibrations to power electronic devices. [0003] The cantilever piezoelectric vibrator has the characteristics of re...

AI Technical Summary

Problems solved by technology

US patent (publication number WO2010151738A3) discloses a bistable piezoelectric cantilever beam power generation device, which effectively widens the resonance frequency band of the cantilever beam, but the degree of bandwidth expansion is not very large

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