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Bistable state spherical surface composite cantilever piezoelectric power generation device

A composite cantilever beam, piezoelectric power generation technology, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problem that the degree of bandwidth expansion is not very large, Achieve the effect of increasing power generation and reducing volume

Active Publication Date: 2015-01-07
BEIJING UNIV OF TECH
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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

Method used

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  • Bistable state spherical surface composite cantilever piezoelectric power generation device
  • Bistable state spherical surface composite cantilever piezoelectric power generation device
  • Bistable state spherical surface composite cantilever piezoelectric power generation device

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Embodiment Construction

[0023] The present invention will be further described in detail below in combination with specific embodiments.

[0024] Such as Figure 1-7 As shown, the bistable spherical composite cantilever beam piezoelectric power generation device includes a beam frame 10 and a housing 14; the housing 14 is spherical, and the bottom is cut with a circular opening; the beam frame 10 and the housing 14 are respectively fixed on the base.

[0025] The beam frame 10 includes a fixed ball 11, a piezoelectric cantilever beam 12, and a support rod 13; the fixed ball 11 is fixedly connected with the piezoelectric cantilever beam 12; 10 is the core structure of the present invention, the vibration of beam frame 10 can cause the deformation of piezoelectric cantilever beam 12, can produce electric energy because of piezoelectric effect when piezoelectric cantilever beam 12 deforms; The quantity of piezoelectric cantilever beam 12 is twenty-five divided into four layers, the first layer is one,...

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Abstract

The invention discloses a bistable state spherical surface composite cantilever piezoelectric power generation device. The device comprises a beam frame and a spherical shell. A circular opening is formed in the bottom of the shell. The beam frame and the shell are fixed to a base. The vibration of the beam frame can make piezoelectric cantilevers to deform, and when the piezoelectric cantilevers deform, electric energy can be produced due to the piezoelectric effect. The number of the piezoelectric cantilevers is twenty-five, and the piezoelectric cantilevers are evenly and annularly distributed among layers. The inherent non-linear characteristic of a bistable state piezoelectric power generation system is utilized, piezoelectric cantilever oscillators are made to do stochastic resonance through the combined action of the environment vibration excitation and magnetic force, the low resonant frequency and larger amplitude are achieved, and therefore the produced electric quantity is relatively large. According to the bistable state spherical surface composite cantilever piezoelectric power generation device, twenty-five piezoelectric oscillator structures are arranged, the lengths of the adjacent cantilevers in the same plane are different, and a wide resonance frequency domain can be formed, and the electric energy production can be obviously increased through the piezoelectric oscillator structures.

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...

Claims

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Application Information

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IPC IPC(8): H02N2/18
Inventor 姚明辉李印波张伟
Owner BEIJING UNIV OF TECH
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