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Three-dimensional annular broadband piezoelectric vibration energy acquisition structure based on flexible main beam

A piezoelectric vibration and energy harvesting technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc. It can improve the continuity and stability, enhance the environmental adaptability, and widen the working frequency band.

Active Publication Date: 2021-05-07
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the shortcomings and deficiencies of the existing technology, a three-dimensional annular broadband piezoelectric vibration energy collection structure based on flexible main beams is provided, which can solve the problems of narrow operating frequency band, high resonance frequency, and single energy collection direction of the vibration energy collection device. The random and changeable vibration frequency leads to extremely low energy harvesting efficiency, poor output stability and continuity, and insufficient applicability to the environment

Method used

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  • Three-dimensional annular broadband piezoelectric vibration energy acquisition structure based on flexible main beam
  • Three-dimensional annular broadband piezoelectric vibration energy acquisition structure based on flexible main beam
  • Three-dimensional annular broadband piezoelectric vibration energy acquisition structure based on flexible main beam

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Embodiment 1

[0028]Such asFigure 1 - Figure 3 As shown, a three-dimensional annular wide frequency vibration energy acquisition structure based on the flexible main beam, including a flexible main beam 1, a first piezoelectric collector rod, a second piezoelectric collection rod 3 four, third pressure The electro-collecting rod 4, the piezoelectric collecting piece 5, the flexible main beam 1 is a ring structure, and a circular hole is opened in the middle; four of the first piezoelectric acquisition rods 2 vertically bonded to the ring shape of the flexible main beam 1. The surface, the four of the second piezoelectric acquisition rods 3 are embedded in the radial direction, and one end is embedded in the annular outer side wall fixed to the flexible main beam 1, and the other end is directed to the outer side, the shape of the piezoelectric collecting piece 5 is cross-shaped. The end is embedded in the inner ring secured in the flexible main beam 1, and the central surface is secured to the bo...

Embodiment 2

[0030]Such asfigure 2 ,Figure 4 - Figure 5 As shown, a three-dimensional annular wide frequency vibration energy acquisition structure based on the flexible main beam, including the flexible main beam 1, the first piezoelectric collection rod, the second piezoelectric collection rod 3 four, third pressure Electric capture rod 4, piezoelectric collecting piece 5, the flexible main beam 1 is a ring structure, a circular hole in the middle; eight of the first piezoelectric acquisition rods 2 vertically bonded to the ring shape of the flexible main beam 1 The surface, the four of the second piezoelectric acquisition rods 3 are embedded in the radial direction, and one end is embedded in an annular outer side wall fixed to the flexible main beam 1, and the other end is directed to the outer side of the annular, and the shape of the piezoelectric collecting piece 5 is mimic. The end is embedded in the inner ring secured in the flexible main beam 1, and the central surface is secured to th...

Embodiment 3

[0032]Such asfigure 2 ,Figure 6 - Figure 7As shown, a three-dimensional annular wide frequency vibration energy acquisition structure based on the flexible main beam, including a flexible main beam 1, a first piezoelectric collector rod, a second piezoelectric collection rod 3 six, third pressure The electro-collecting rod 4, the piezoelectric collecting piece 5, the flexible main beam 1 is a ring structure, and a circular hole is opened in the middle; four of the first piezoelectric acquisition rods 2 vertically bonded to the ring shape of the flexible main beam 1. The surface, six of the second piezoelectric acquisition rods 3 are spaced apart from the radial direction, and one end is embedded in the annular outer side wall fixed to the flexible main beam 1, and the other end is directed to the outer side, the shape of the piezoelectric collecting sheet 5 is radially, the end The inner ring is embedded in the flexible main beam 1, and the central surface is fixed to the bottom of ...

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Abstract

The invention provides a three-dimensional annular broadband piezoelectric vibration energy acquisition structure based on a flexible main beam, which comprises the flexible main beam, a first piezoelectric acquisition rod, a second piezoelectric acquisition rod, a third piezoelectric acquisition rod and a piezoelectric acquisition piece, wherein the piezoelectric acquisition piece can acquire vertical vibration energy, the first piezoelectric acquisition rod and the third piezoelectric acquisition rod can acquire vibration energy in any horizontal direction, and the second piezoelectric acquisition rod can acquire vibration energy in any direction perpendicular to the annular radial direction, so that acquisition of three-dimensional vibration energy is realized; meanwhile, by adjusting the sizes of the piezoelectric acquisition piece and the piezoelectric acquisition rods, the vibration mode separation of different piezoelectric acquisition rods can be realized, the working frequency band of the system is widened, and the external vibration energy can be effectively acquired; in addition, by adjusting the shape of the piezoelectric acquisition piece and the number of the piezoelectric acquisition rods, the effective frequency band width of the system can be adjusted in time, the output continuity and stability of the energy collector are improved, and the environment adaptability of the vibration energy collector is further enhanced.

Description

Technical field[0001]The present invention relates to the field of microelectromechanical devices, and more particularly to a three-dimensional annular wide frequency vibration energy acquisition structure based on a flexible main beam.Background technique[0002]With the rapid development of wireless sensing networks in the field environment, industrial monitoring, wearable equipment, portable medical electronic systems, etc., the wireless sensing network nodes and electrical energy supply of micro-electronic devices in special fields. Key issues of further promoting their applications. The traditional power supply has some defects that cannot be overcome, such as the problem of chemical cell volume, short life, pollution environment, and has a problem with cable power supply, and thus the energy in the surrounding environment is converted to electrical energy to meet wireless sensing networks or The self-powered demand for small electronic devices in special fields has become a rese...

Claims

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Application Information

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IPC IPC(8): H02N2/18
CPCH02N2/186
Inventor 王莹陈名陈力荣
Owner SHANXI UNIV