Multilayer beam type piezoelectric generator and power generation method thereof

A generator and piezoelectric technology, applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve the problems of low piezoelectric conversion efficiency, small load capacity and charge Small problems, to achieve the effect of improving piezoelectric conversion efficiency, reducing power generation consumption, and large charge

Inactive Publication Date: 2012-05-30
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing piezoelectric generators generally use a single circular piezoelectric composite plate to generate electricity. Although this structure has the advantages of easy power generation and simple structure, it cannot carry the load due to the use of a single piezoelectric composite plate. Excessive alternating loads to generate electricity generally have defects such as small amount of charge generated, low power, low stiffness, small carrying capacity, and low piezoelectric conversion efficiency.

Method used

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  • Multilayer beam type piezoelectric generator and power generation method thereof
  • Multilayer beam type piezoelectric generator and power generation method thereof
  • Multilayer beam type piezoelectric generator and power generation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Figure 1~2 Shows the specific structure diagram of this embodiment, the multilayer beam piezoelectric generator includes several piezoelectric composite plates 4, such as figure 2 As shown in (a), each piezoelectric composite plate 4 includes piezoelectric elements 1, 3 and an elastic metal body 2. The piezoelectric elements 1, 3 are respectively connected to the upper and lower surfaces of the elastic metal body 2; figure 1 As shown, one end of the piezoelectric composite plate 4 is fixedly connected with the frame 6 and the other end is rigidly connected with the force transmission block 5, and each piezoelectric composite plate is rigidly connected by the force transmission block.

[0032] Such as figure 1 As shown, a number of piezoelectric composite plates 4 are fixed on the frame 6 along the thickness direction to form a piezoelectric composite plate beam group; the number of piezoelectric composite plate beam groups is a group, and is fixed to the frame 6 Above, ea...

Embodiment 2

[0037] This embodiment is the same as embodiment 1 except for the following features: image 3 As shown in (a), the plurality of piezoelectric composite plates 4 are fixed on the frame 7 along the thickness direction to form a piezoelectric composite plate beam group; the piezoelectric composite plate beam group is in several groups, and each piezoelectric composite plate The beam groups are centered on the force transmission block 8 and are symmetrically fixed on the frame 7 on both sides, and the piezoelectric composite plates are distributed in a rectangular parallelepiped array. Such as image 3 As shown in (b), the piezoelectric composite board 4 has a trapezoidal structure, that is, both the piezoelectric element and the elastic metal body are rectangular structures.

Embodiment 3

[0039] This embodiment is the same as embodiment 1 except for the following features: Figure 4 As shown in (b), the piezoelectric composite plate 9 has a trapezoidal structure, in which the piezoelectric element and the elastic metal body are both trapezoidal structures, and the piezoelectric element is polarized in the thickness direction.

[0040] Such as Figure 4 As shown in (a), the plurality of piezoelectric composite plates 9 are fixed on the frame 10 along the thickness direction to form a piezoelectric composite plate beam group; the piezoelectric composite plate beam group is in several groups, and each piezoelectric composite plate The beam groups are centered on the force transmission block 11 and are evenly fixed on the surrounding frame 10, and the piezoelectric composite plates are distributed in a regular triangular prism array.

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Abstract

The invention provides a multilayer beam type piezoelectric generator, comprising a plurality of piezoelectric composite boards. The piezoelectric composite boards comprise piezoelectric elements and elastic metallic objects. The piezoelectric elements are respectively connected with the upper and lower surfaces of the elastic metallic objects. One end of each piezoelectric composite board is fixedly connected with racks and the other end thereof is rigidly connected with force transfer blocks. The piezoelectric composite boards are rigidly connected with each other by the force transfer blocks and are distributed in prismoid or cuboid arrays. The invention also provides a power generation method realized by the generator, which is characterized in that bending elasticity deformation of the elastic metallic objects is converted into piezoelectric effects of the piezoelectric elements to form alternating potential; and the alternating potential is rectified and transformed to output direct current or store the direct current. The invention has the advantages of simple structure, large charge generation, higher piezoelectric conversion efficiency, high rigidity, no electromagnetic field effect, small volume and combination in series or in parallel, and can convert the vibrational energy into useful electric energy to be stored into a capacitor or a rechargeable battery to be used.

Description

Technical field [0001] The invention belongs to the technical field of generators, and particularly relates to a piezoelectric generator and a power generation method thereof. Background technique [0002] A piezoelectric generator is an energy conversion device that uses the piezoelectric effect of piezoelectric ceramics to convert mechanical vibration into electrical energy. It has the advantages of simple structure, light weight, no noise, and reliable operation. It has been used in many fields. Especially used in wireless networks in the field of optoelectronics technology. At present, the existing piezoelectric generators generally use a single circular piezoelectric composite plate to generate electricity. Although this structure has the advantages of easy power generation and simple structure, because it uses a single piezoelectric composite plate, it cannot carry Excessive alternating load is used to generate electricity, and the defects such as small amount of charge, l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/18
Inventor 张铁民文晟梁莉陈柱子
Owner SOUTH CHINA AGRI UNIV
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