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Multi-directional vibration responded energy collector

A vibration energy harvesting, multi-directional technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve problems such as high operating frequency and inability to collect vibration energy. Achieve high collection efficiency

Active Publication Date: 2016-09-07
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The energy harvester that is usually studied is to respond to the vibration excitation in a certain direction to collect energy, and it needs a relatively high operating frequency. In the lower frequency range, such as the frequency of human motion is only below 10Hz, it cannot be effective. Harvesting vibration energy

Method used

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  • Multi-directional vibration responded energy collector

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A multi-directional response vibration energy harvester includes a bracket, a cover plate is arranged above the bracket, a bottom plate is arranged below the bracket, and at least three folded piezoelectric beams are arranged inside the bracket. The folded piezoelectric beam is made of piezoelectric material, electrodes with different polarities are arranged on both sides of the folded piezoelectric beam, and the electrodes are connected with a power management circuit. There is a distance between the bent parts of the folded piezoelectric beam, and the distance can make the folded piezoelectric beam produce piezoelectric effect. The two ends of the folded piezoelectric beam are a fixed end and a cantilever end, the fixed end of the folded piezoelectric beam is fixed on the support, and the cantilever end of the folded piezoelectric beam extends to the middle of the support. A sphere is arranged in the space surrounded by the cantilever ends of the folded piezoelectric ...

Embodiment 2

[0029] A multi-directional response vibration energy harvester comprises a bracket 1, a cover plate 2 is arranged above the bracket 1, and a bottom plate 3 is arranged under the bracket 1. There are at least three evenly distributed folded piezoelectric beams 5 inside the bracket 1 , electrodes with different polarities are arranged on both sides of the folded piezoelectric beams 5 , and the electrodes are connected to the power management circuit. There is a gap between the bending parts of the folded piezoelectric beam 5, the two ends of the folded piezoelectric beam 5 are fixed ends and cantilever ends, the fixed end of the folded piezoelectric beam 5 is fixed on the support, and the cantilever of the folded piezoelectric beam 5 The end extends to the middle of the bracket, and a sphere 7 is arranged in the space surrounded by the cantilever end of the folded piezoelectric beam 5 . The folded piezoelectric beams 5 are evenly distributed, on the one hand, it can improve the ...

Embodiment 3

[0040] Such as figure 1 , figure 2 , image 3 and Figure 4 As shown, a multi-directional response vibration energy harvester includes a support 1, a cover plate 2 is arranged above the support 1, a bottom plate 3 is provided below the support 1, and the support 1 is a cylindrical support, which is convenient for folding the piezoelectric beam 5 is set on the bracket 1. Four evenly distributed folded piezoelectric beams 5 are arranged inside the bracket 1 . The number of folded piezoelectric beams 5 is set to 4, and the folded piezoelectric beams 5 are evenly distributed along the circumference of the support 1, and the four folded piezoelectric beams 5 are on the same plane, and the plane is parallel to the cover plate 2 or the bottom plate 3, so that Each folded piezoelectric beam 5 can be received in the middle of the support 1 as uniformly as possible during operation. The two ends of the folded piezoelectric beam 5 are a fixed end and a cantilever end, the fixed end...

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Abstract

The invention discloses a multi-directional vibration responded energy collector, comprising a bracket, wherein a cover plate is arranged on the bracket, a bottom plate is arranged under the bracket, at least three folding piezoelectric beams are arranged in the bracket, two ends of each folding piezoelectric beam are a fixed end and a cantilever end, the fixed ends of the folding piezoelectric beams are fixed on the bracket, the cantilever ends of the folding piezoelectric beams stretch into the middle part of the bracket, and a ball is arranged in a space encircled by the cantilever ends of the folding piezoelectric beams; the ball is a magnetized ball, a magnet structure is arranged on the bottom plate, a repulsive force acts between the ball and the magnet structure, the ball is in a suspension state under the action of the repulsive force of the magnet structure, and a vertical folding piezoelectric beam fixed on the cover plate is arranged right above the ball. According to device, by moving the ball under the action of external vibration excitation, acting forces are applied to the surrounding folding piezoelectric beams, so that the folding piezoelectric beams deform and generate stresses; and piezoelectric charges are generated on two sides of each folding piezoelectric beam by the piezoelectric effect, and collected by electrodes, so that the vibration energy is collected, and the collection efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of energy harvesters, in particular to a multi-directional response vibration energy harvester, which can respond to vibration excitations in various directions, realize energy collection, convert vibration energy in the environment into electrical energy, and improve energy efficiency. collection efficiency. Background technique [0002] With the gradual consumption of petrochemical energy, energy issues have gradually attracted worldwide attention. While nature endows us with various forms of energy, most of the energy is currently not being utilized. For example, solar energy is converted into electrical energy through photoelectric conversion, waste heat is converted into electrical energy through thermoelectric effect, energy harvested through biochemical reactions, and vibration energy in the environment is converted into electrical energy through component movement. Vibration energy harvesting can b...

Claims

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Application Information

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IPC IPC(8): H02N2/18
CPCH02N2/186
Inventor 苏宇锋张坤段智勇郭丹叶志通秦立振张振宇
Owner ZHENGZHOU UNIV
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