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Compound vibration energy collector based on piezoelectricity and static electricity

A vibration energy harvesting and energy harvesting technology, which is applied in piezoelectric/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problems such as the decrease of energy harvesting efficiency of vibration energy harvesters, etc. achieve the effect of simple structure

Inactive Publication Date: 2012-07-04
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the external vibration frequency deviates from the resonance frequency of the vibration energy harvester, the energy harvesting efficiency of the vibration energy harvester will drop sharply

Method used

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  • Compound vibration energy collector based on piezoelectricity and static electricity
  • Compound vibration energy collector based on piezoelectricity and static electricity
  • Compound vibration energy collector based on piezoelectricity and static electricity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] see Figure 1~4 , The present invention is provided with bracket 1, mass block 2, hollow connection plate 6, upper capacitor plate 5, lower capacitor plate 4, piezoelectric sheet group and energy harvesting circuit.

[0036] The support 1 is a rectangular frame. The mass block 2 is arranged in the center of the support 1 and is integrated with the support 1 through the hollow connecting plate 6 (the mass block and the hollow connecting plate are integrated with the rectangular frame). The hollow connection plate 6 is provided with four L-shaped hollow grooves 61-64, with the center line of the mass block 2 as the reference, and the hollow grooves surround the periphery of the mass block 2 inside and outside and are arranged symmetrically. The upper capacitor plate 5 is fixed on the upper part of the support 1 and is located above the mass block 2 . The lower capacitor plate 4 is fixed on the upper end of the proof mass 2 and faces the upper capacitor plate 5 . The pi...

Embodiment 2

[0038] see Figure 5 , similar to Embodiment 1, the only difference is that the four L-shaped hollow grooves 61 ′- 64 ′ provided on the hollow connection plate 6 ′ are staggered around the periphery of the mass block 2 , and are still arranged symmetrically.

Embodiment 3

[0040] see Figure 6 , similar to Embodiment 1, the difference is that the piezoelectric AC power source formed after each pair of electrodes is connected in series is directly connected to the external load 8 . The variable capacitor formed by the upper capacitor plate 5 and the lower capacitor plate 4 is powered by the capacitor plate starting power supply 9 (external power supply, such as a battery or externally connected mains power by an adapter). Figure 6 The rest of the labels in the figure 1 correspond to the same.

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Abstract

The invention discloses a compound vibration energy collector based on piezoelectricity and static electricity and relates to a vibration energy collecting device. The compound vibration energy collector based on piezoelectricity and static electricity can be used for realizing the self-adaption, high-efficiency and wideband collection of environment vibration energy, is self-energizing and is provided with a support frame, a mass block, a hollow connecting plate, an upper capacitance plate, a lower capacitance plate, a piezoelectric piece group and an energy collecting circuit or is provided with a support frame, a mass block, a hollow connecting plate, an upper capacitance plate, a lower capacitance plate, a piezoelectric piece group and an energy collecting circuit.

Description

technical field [0001] The invention relates to a vibration energy harvesting device, in particular to a composite vibration energy harvester based on piezoelectric static electricity. Background technique [0002] In modern society, environmental energy harvesting technology has always been a very popular research topic. Wind energy, solar energy, and vibration energy in the environment are all green energy sources. In today's energy shortage, it is particularly important to develop these energies. Since vibration energy is ubiquitous, the harvesting technology based on vibration energy has become the focus of research. At present, vibration energy harvesting technology is mainly based on the following three methods: electromagnetic, electrostatic (also called capacitive) and piezoelectric. [0003] The output voltage of the electromagnetic vibration energy harvester is low, while the output voltage of the electrostatic and piezoelectric type is high, which is an ideal way...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18
Inventor 伞海生邓志强赵山华
Owner XIAMEN UNIV
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