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Vertical and horizontal compound excitation type piezoelectric energy harvester

A technology of piezoelectric energy harvesting and compound excitation, which is applied in piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc., can solve the problem of limited freedom and unsuitable multi-directional vibration energy recovery and other issues to achieve the effect of high reliability

Inactive Publication Date: 2012-07-18
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a vertical and horizontal compound excitation type piezoelectric energy harvester to solve the problem that the existing vibrating piezoelectric energy harvester has limited freedom and is not suitable for multi-directional vibration energy recovery

Method used

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  • Vertical and horizontal compound excitation type piezoelectric energy harvester
  • Vertical and horizontal compound excitation type piezoelectric energy harvester
  • Vertical and horizontal compound excitation type piezoelectric energy harvester

Examples

Experimental program
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Embodiment Construction

[0013] like figure 1 , figure 2 , image 3 As shown, the upper casing 1 and the lower casing 11 are connected by screws, and a group of piezoelectric vibrators 6 are clamped between the upper casing 1 and the lower casing 11; the piezoelectric vibrators 6 are composed of a metal substrate 6- 1 and the piezoelectric wafer 6-2 are bonded together. The free end of the piezoelectric vibrator 6 is installed with a magnet 5; A ball pin 8 is installed; the ball pin 8 is connected with the inertia block 2 through the screw 2-1 on the inertia block 2; the screw 2-1 is sleeved with a first annular magnet 3, a sleeve 4 and a Two ring magnets 7, the first ring magnet 3, the sleeve 4 and the second ring magnet 7 are crimped between the ball pin 8 and the inertia block 2; the ball pin 8 is covered with a spring 9, so The spring 9 is crimped between the ball pin sleeve 10 and the second annular magnet 7; the magnet 5 installed on the piezoelectric vibrator 6 and the first annular magnet ...

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Abstract

The invention relates to a vertical and horizontal compound excitation type piezoelectric energy harvester and belongs to the technical field of new energy sources and power generation. An upper casing and a lower casing are connected through screws, a group of piezoelectric vibrators are arranged and clamped between the upper casing and the lower casing, the free ends of the piezoelectric vibrators are provided with magnets, a ball pin is connected with an inertia block through a screw rod arranged on the inertia block, a first annular magnet, a sleeve and a second annular magnet are sequentially sheathed on the screw rod, and the magnets arranged on the piezoelectric vibrators and the first annular magnet and the second annular magnet arranged on the screw rod are arranged in a way of the similar magnetic poles of the magnets, the first annular magnet and the second annular magnet being close to one another.. The invention has the advantages that the vibration energy recovery in the vertical direction and any one horizontal direction can be realized; the vertical and horizontal compound excitation type piezoelectric energy harvester is applicable to low-frequency and great-amplitude vibration environment; and in addition, the reliability is high.

Description

technical field [0001] The invention belongs to the technical field of new energy and power generation, in particular to a piezoelectric energy harvester, which provides real-time energy supply for portable micro-power electronic products and wireless sensor monitoring systems. Background technique [0002] Micro-scale energy harvesters constructed by using piezoelectric ceramic materials to recover environmental vibration energy are considered to be effective means of real-time self-powering of portable micro-power electronic products and remote implanted sensing monitoring systems. Although some types of piezoelectric energy harvesters have been applied in reality, their adaptability to vibration environment, reliability and energy conversion efficiency are still relatively limited, which is not conducive to the further development of piezoelectric vibration energy harvesting technology. Promote the application. [0003] For the vibrating piezoelectric energy harvester, o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18
Inventor 王淑云阚君武李凝程光明曾平
Owner ZHEJIANG NORMAL UNIVERSITY
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