Piezoelectric generator for collecting bending vibration energy

A bending vibration and piezoelectric technology, applied in the field of piezoelectric devices, can solve the problem of less technical solutions for structural design of vibration piezoelectric power generation devices, and achieve significant economic and social value, low cost, and fast response.

Inactive Publication Date: 2008-09-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Piezoelectric generator for collecting bending vibration energy
  • Piezoelectric generator for collecting bending vibration energy
  • Piezoelectric generator for collecting bending vibration energy

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Embodiment Construction

[0016] Embodiments of the present invention are described in detail below with the aid of figures and examples.

[0017] figure 1 Shown is a piezoelectric generator A, which has a metal layer in the middle, piezoelectric ceramic layers 1, 2 above and below, and conductive adhesive layers 4, 5 between them. Here the piezoelectric ceramic is lead zirconate titanate (Pb(Ti x Zr 1-x )O 3 ) PZT-5 in piezoelectric ceramics. In addition, the piezoelectric ceramic layers (1, 2) can correspond to other 31 And piezoelectric materials with high electromechanical coupling coefficient and dielectric constant, especially with the advancement of piezoelectric technology, it is possible to provide lead-free piezoelectric ceramic materials with the above characteristics. The metal layer is beryllium bronze (QBe-2Y), which has the characteristics of high strength, high hardness, high conductivity, high elasticity, wear resistance, fatigue resistance, corrosion resistance and small elastic ...

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Abstract

The invention relates to a piezoelectric generator collecting energy of bending vibration and pertains to the technical field of piezoelectric generators. The piezoelectric generator of the invention is characterized by the adoption of a three-layer structure with two cantilevered piezoelectric ceramic layers and a metal layer, namely, the upper layer and the lower layer of the piezoelectric generator are piezoelectric ceramic layers (1, 2), the polarization direction of which are opposite; the piezoelectric ceramic layers are respectively stuck with a metal layer (3) in the middle by conductive adhesive layers (4, 5) and electrode surfaces (6, 7) of the piezoelectric ceramic layers (1, 2) are connected with a power circuit with functions of rectification and energy collection by conducting wires (8, 9); the metal layer (3) at a fixed end of a piezoelectric device stretches outside the piezoelectric ceramic layers (1, 2) and the piezoelectric device is fixed through the metal layer (3) at the fixed end. The piezoelectric generator of the invention has the advantages of fast responding, low cost, simple structure, no heat emission, and no consumption of any material during operation, etc., and the piezoelectric generator meets the requirement of saving energy and has obvious commercial and social values.

Description

technical field [0001] The present invention relates to a piezoelectric device, a piezoelectric device which can be used as a piezoelectric generator for converting mechanical energy of bending vibrations into electrical energy. Background technique [0002] The presently published technology involves further developments in piezoelectric technology, piezoelectric power generating devices developed for the purpose of energy harvesting, and can be integrated with virtually any vibration generating device or structure to provide self-powered systems and devices. Such as CN 1220782A, CN1985380A and CN 101017989A. Among them, CN 1220782A discloses a method for improving the energy transfer efficiency from the excitation device to the vibrating plate, through the wrist, etc. Movement, high-efficiency power generation; CN1985380A discloses that a single piezoelectric device and structure can be used alone as a balanced pair structure, or combined with other elements to enhance th...

Claims

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Application Information

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IPC IPC(8): H02N2/18
Inventor 龚立娇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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