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A Bistable Nonlinear Energy Harvesting Device Using Lever

A bistable nonlinear, energy harvesting technology, applied in piezoelectric/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc. Simple structure, improve energy collection efficiency, and amplify the effect of excitation

Active Publication Date: 2020-02-07
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these solutions are complex and difficult to implement

Method used

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  • A Bistable Nonlinear Energy Harvesting Device Using Lever
  • A Bistable Nonlinear Energy Harvesting Device Using Lever
  • A Bistable Nonlinear Energy Harvesting Device Using Lever

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0039] A bistable non-linear energy harvesting device using a lever, mainly composed of a piezoelectric sheet beam made of spring steel and piezoelectric ceramics 1, an aluminum connector 2, a lever mass with a certain mass 3, an aluminum belt lever The lever 4 of the slot 4A, two aluminum border fixing parts with a hinge 5A with a concave-convex structure 5, the lever connecting part hinge 6, the lever rotating shaft 7, two aluminum pressing parts 8 that can clamp thin sheets 1. The rectangular parallelepiped base with holes 9A of aluminum band base groove 9A is formed.

[0040] In this device, two boundary fixing parts 5 are placed on the base 9, and the lower sliders can slide along the base groove 9A on the base 9 to adjust the spacing. The pressing part 8 is hinged with the boundary fixing part 5, so that the pressing part 8 can rotate, and the pressing part 8 clamps the piezoelectric sheet beam 1 so that both ends thereof are fixedly supported. The lever rotating shaft ...

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Abstract

The invention discloses a lever-based bistable non-linear energy collecting device, which comprises an energy collecting device and a lever structure, wherein the energy collecting device adopts a bistable non-linear structure and converts mechanical energy into electric energy by using vibration; and the lever structure is combined with the bistable non-linear structure and used for amplifying the excitation effect so as to improve the energy collecting efficiency. The lever-based bistable non-linear energy collecting device provided by the invention can significantly amplify the excitation effect, has a good cross-well dynamic response and can significantly improve the energy collecting efficiency.

Description

technical field [0001] The invention belongs to the technical field of microelectronic machinery, and in particular relates to a bistable non-linear energy collection device using a lever. Background technique [0002] People have always hoped to find an energy harvesting device using vibration to meet the energy requirements of small electronic devices and sensors, so as to better realize the energy sustainability of microelectromechanical machines (MEMS). Existing energy harvesting devices typically use vibrations to convert mechanical energy into electrical energy. In order to improve the energy conversion efficiency, it is necessary to ensure that the excitation can cause as large a vibration as possible. However, the current energy harvesting devices based on linear structure design can only work in a very limited bandwidth near the resonance frequency. In order to expand the effective harvesting bandwidth, nonlinear structures are introduced into the design of energy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/18
Inventor 杨恺苏克玮邱天李仁府
Owner HUAZHONG UNIV OF SCI & TECH
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