Cantilever mechanism for piezoelectric power generation

A technology of piezoelectric power generation and cantilever beams, which is applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc. Issues such as the overall bandwidth of the electric cantilever mechanism achieve the effect of enhancing the energy conversion effect

Inactive Publication Date: 2014-06-25
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of existing piezoelectric cantilever generators that cannot make full use of vibration energy due to their small bandwidth under low-frequency operating conditions, a dual-inertia system that can decouple the natural frequencies of the bending mode and torsional mode of the piezoelectric cantilever

Method used

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  • Cantilever mechanism for piezoelectric power generation
  • Cantilever mechanism for piezoelectric power generation

Examples

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Embodiment Construction

[0014] The structure and principle of the present invention will be further described in detail in the implementation examples given below in conjunction with the accompanying drawings.

[0015] refer to figure 2 , the double-inertia multi-mode piezoelectric cantilever generator mechanism of the present invention uses a base 1 that directly acts on the vibration source as the power input end of the system, and one end of the elastic substrate 2 made of metal material is bonded on the base 1, The other end is distributed with two groups of mass blocks 4 connected to the elastic substrate 2 through the adhesive layer 41, and the piezoelectric material sheet 3 is bonded to the surface of the elastic substrate. The piezoelectric material sheet 3 includes symmetrically arranged electrodes 31 and 32. The separation line 33 between each electrode 31 and the electrode 32 is along the midline of the cantilever beam from the base 1 to the direction of the distributed mass 4, the electr...

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Abstract

The invention relates to a cantilever mechanism for piezoelectric power generation. The cantilever mechanism comprises a base (1), an elastic substrate (2), a piezoelectric material thin sheet (3), mass blocks (4) and a wire, wherein one end of the elastic substrate (2) is connected with the base (1), the piezoelectric material thin sheet (3) is laminated with the elastic substrate (2), the mass blocks (4) are arranged at one end, far away from the base (1), of the elastic substrate (2), an electrode (31) and an electrode (32) are arranged on the surface of the piezoelectric material thin sheet (3), an electrode cutting line (33) is arranged between the electrode (31) and the electrode (32), the electrode cutting line (33) is formed in an area in a middle line in the direction from the base (1) to the mass blocks (4), wherein the electrodes are not arranged in the area. The mass blocks (4) are symmetrically distributed and arranged relative to the electrode cutting line (33), and the cantilever mechanism for piezoelectric power generation has multi-mode characteristics and broadband characteristics.

Description

technical field [0001] The invention relates to a piezoelectric generating cantilever beam mechanism, in particular to a multi-deformation mode piezoelectric generating mechanism utilizing a piezoelectric cantilever beam. Background technique [0002] The most basic structure of the piezoelectric cantilever beam power generation device used to collect random vibration energy is as follows: figure 1 As shown, it is composed of a base 1, an elastic substrate 2, a piezoelectric ceramic wafer 3 and a lumped mass 4. The vibration of the base drives the system to vibrate, causing the piezoelectric cantilever to bend, and the piezoelectric ceramic produces strain and stress. The characteristic converts the stress into the voltage between the two electrodes to form the power generation capacity, and then collects the generated electric energy through the collection circuit. There is an optimal operating frequency of this power generation device, which is the natural frequency of th...

Claims

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Application Information

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IPC IPC(8): H02N2/18
Inventor 吴越杨志刚陈龙李新波张东伟
Owner JILIN UNIV
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