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A self-frequency-modulating vibration energy harvesting device applied in a rotating environment

A vibration energy collection and environmental technology, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problem of high spring design requirements, to increase the working frequency bandwidth, Effects of avoiding damage and improving reliability

Active Publication Date: 2021-07-09
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can realize that the natural frequency of the piezoelectric vibration energy harvester changes with the change of the rotational excitation frequency, but to achieve frequency matching within a large frequency range, the design requirements for the spring are high

Method used

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  • A self-frequency-modulating vibration energy harvesting device applied in a rotating environment
  • A self-frequency-modulating vibration energy harvesting device applied in a rotating environment
  • A self-frequency-modulating vibration energy harvesting device applied in a rotating environment

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Embodiment Construction

[0031] Embodiments of the present invention will be disclosed in the following diagrams. For the sake of clarity, many practical details will be described together in the following description. It should be understood, however, that these practical details should not be used to limit the invention. That is, in some embodiments of the invention, these practical details are not necessary. In addition, for the sake of simplifying the drawings, some well-known and commonly used structures and components will be shown in a simple schematic manner in the drawings.

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] Please refer to Figure 1-Figure 2 , figure 1 and figure 2 It is respectively a structural schematic diagram and an exploded view of a preferred embodiment of a self-frequency-regulating vibration energy harvesting device applied to a rotating environment provided by the present invent...

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Abstract

The present invention provides a self-frequency-regulating vibration energy harvesting device applied to a rotating environment, comprising a vibration energy collector, an outer frame, a counterweight mass block and an elastic structure, the outer frame is a U-shaped frame structure, and its two sides are guide rail rods, guide rails The rod is slidingly connected to the elastic structure; the two ends of the counterweight mass are respectively connected to two elastic structures; the middle part of the counterweight mass is fixedly connected to one end of the vibration energy collector; the vibration energy harvester includes a cantilever beam, a frequency modulation mass and an additional mass; The frequency modulation mass block is fixed at the end of the cantilever beam; there is a through-slot in the middle of the additional mass block for the cantilever beam to pass through the through-slot and not fixedly connected with the additional mass block, and the width of the frequency modulation mass block at the end of the cantilever beam is larger than that in the middle of the additional mass block The self-frequency-modulating vibration energy harvesting device of the present invention can adjust the natural frequency of the vibration energy harvester to achieve matching with the rotation excitation frequency and increase the working frequency bandwidth of the vibration energy harvester.

Description

technical field [0001] The invention relates to the technical field of energy collection, in particular to a self-frequency-regulating vibration energy collection device applied to a rotating environment. Background technique [0002] The vibration energy harvester, which converts vibration energy in the environment into electrical energy, has the advantages of long life, small size, light weight, and high energy density. It is the most promising technical solution to replace traditional chemical energy batteries to power microelectronic devices and systems. One, has aroused great interest in both academia and industry. [0003] The high-performance output vibration energy harvester requires the vibration energy harvester to have high vibration energy acquisition and vibration energy conversion capabilities at the same time. The vibration energy harvester based on the resonance effect has high energy acquisition efficiency at resonance, and is currently the main vibration en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/18
CPCH02N2/188
Inventor 邓丽城蒋坚张鼎力周林方玉明
Owner NANJING UNIV OF POSTS & TELECOMM
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