High-efficiency multidirectional vibration energy collection device

A vibration energy harvesting, multi-directional technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problem of narrow working frequency band, low energy efficiency, vibration excitation, etc. problems, to achieve strong nonlinearity, good reliability, and the effect of protecting piezoelectric materials

Inactive Publication Date: 2015-01-14
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve three problems in the prior art: low energy efficiency, narrow operating frequency band, and vibration energy in

Method used

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  • High-efficiency multidirectional vibration energy collection device
  • High-efficiency multidirectional vibration energy collection device

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Embodiment

[0058] A prototype was built to verify the invention. PZT-5A (40×15×0.5mm 3 ) was used as the piezoelectric material for the prototype. The total mass of the masses is 100g. The elastic beam is aluminum and its size is 50×4×0.38mm 3 . One end of the elastic beam is fixed on the base, and the other end is fixed on the central bending extension element. The central curved tensile element consists of a PZT-5A plate and two arcuate aluminum plates (thickness 0.5mm). The bow-shaped aluminum plate is fixed on the PZT plate by epoxy resin. The prototype machine was installed on a vibration test bench, and a 300KΩ resistor was connected externally. The excitation vibration is 10-30 Hz with an acceleration of 0.5 g. The output voltage was recorded by a digital oscilloscope. Energy output is the square of the output voltage divided by the resistance.

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Abstract

A high-efficiency multidirectional vibration energy collection device comprises a piezoelectric material, arch-shaped plates, mass blocks, elastic beams and bases. According to the structure of the high-efficiency multidirectional vibration energy collection device, the piezoelectric material serves as a symcenter, and the arch-shaped plates, the mass blocks, the elastic beams and the bases are symmetrically distributed on the two sides of the piezoelectric material. The piezoelectric material is connected with the mass blocks on the two sides of the piezoelectric material through the arc-shaped plates, each mass block is connected with the corresponding base through the corresponding elastic beam, and first-level magnification of force is completed through the elastic beams. The elastic beams are connected with the mass blocks and the bases in a fixed mode or in a hinged mode or through spherical joints. Second-level magnification of the force is completed through the arch-shaped plates. The high-efficiency multidirectional vibration energy can generate one more order of magnitude of electric energy than a transmission energy collector under the same environment. Vibration energy in different directions can be collected.

Description

technical field [0001] The invention relates to an energy collection device, in particular to a high-efficiency multi-directional vibration energy collection device, which belongs to the field of energy-saving technology and renewable and environmentally friendly new energy. Background technique [0002] Communication devices, sensor networks, wearable electronics, medical implants, and more play an increasingly important role in modern life. These devices are usually small in size, compact in structure and require long-lasting power supply. For example, forest fire monitoring system usually consists of many sensors, and the distribution area is very large. Replacing and repairing so many sensors is extremely expensive and time-consuming. In order to meet the demand for energy sources with high energy density, light weight and long life, this patent provides a self-powered solution. [0003] Self-powered solutions that exist today are based on harnessing multiple forms of...

Claims

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Application Information

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IPC IPC(8): H02N2/18
Inventor 杨征保祖武争张伟
Owner BEIJING UNIV OF TECH
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