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A Broadband Distributed Vibration Energy Recovery System for Line-defect Phononic Crystals of Composite Materials

A vibration energy recovery and phononic crystal technology, which is applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve the problems of unsatisfactory conversion efficiency and less energy recovery , to achieve the effect of large recovery energy and high conversion efficiency

Inactive Publication Date: 2018-01-12
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the acoustic energy recovery using phononic crystal point defects is mainly aimed at the frequency of the defect state, that is, single-frequency energy recovery, and the energy of other frequencies in the forbidden band is reflected, so the recovered energy is less, and the conversion efficiency is still not ideal.

Method used

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  • A Broadband Distributed Vibration Energy Recovery System for Line-defect Phononic Crystals of Composite Materials
  • A Broadband Distributed Vibration Energy Recovery System for Line-defect Phononic Crystals of Composite Materials
  • A Broadband Distributed Vibration Energy Recovery System for Line-defect Phononic Crystals of Composite Materials

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Embodiment 1

[0020] In the broadband distributed vibration energy recovery system based on the line-defect phononic crystal composite material of the present invention, the ideal phononic crystal is formed by the lead columns 2 distributed in the silicone rubber matrix 1 according to the periodic lattice of the square lattice, and the line The defective material is an aluminum core material composed of a silicon rubber 3 coated with an aluminum column 4 , and a piezoelectric material is embedded in the silicon rubber 3 to realize vibration energy recovery. The lattice constant of the ideal phononic crystal unit cell is a, the radius of the lead column scatterer is r; the radius of the aluminum column in the unit structure of the line defect material is r, and the radius of the silicone rubber 3 is R. figure 1 and figure 2 (c) is a schematic diagram of the structure of the line-defect phononic crystal composite material (structural parameters: a=10mm; r=3.5mm; R=4.5mm).

[0021] Material ...

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Abstract

The invention relates to a broadband distributed vibration energy recovery system with composite material line defect photonic crystals. The broadband distributed vibration energy recovery system comprises the composite material line defect photonic crystals, wherein the composite material line defect photonic crystals are embedded in a matrix through scatterers and are arranged in a periodical array in the matrix, in which one row of the scatterers are composite material line defect structures formed after polymer layers coat the defect scatterers, and the rest of the scatteres are lead cylinder scatterers. According to the system, the energy recovery system with great recovered energy and high conversion efficiency capable of realizing broadband distributed energy recovery can be obtained, the system can be used for realizing low-frequency broadband distributed vibration energy recovery of a naval ship structure, and self-powered energy is provided for naval ship system state monitoring wireless sensors and MEMS systems.

Description

technical field [0001] The invention belongs to the field of vibration energy recovery systems, and in particular relates to an energy collection and conversion system that utilizes line-defect phonon crystals of composite materials to recover broadband distributed vibration energy. Background technique [0002] In order to realize energy recycling, vibration energy recovery has become a hot research topic. Vibration energy recovery refers to the process of converting vibration energy in the environment into usable electrical energy through energy recovery devices. Commonly used vibration energy recovery devices are mainly divided into three types: electrostatic type, electromagnetic type and piezoelectric type. Among them, piezoelectric vibration energy recovery devices mainly use the piezoelectric effect of piezoelectric materials to directly convert external vibration energy into electrical energy, with a simple structure. Ease of integration into the system is the focus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/18
CPCH02N2/186
Inventor 李应刚朱凌
Owner WUHAN UNIV OF TECH
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