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Efficient wideband vibrating energy collector with elastic amplifying mechanism

A vibration energy harvesting and amplifying mechanism technology, applied in generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve the problem of narrow operating frequency band, low energy conversion efficiency, and power generation capacity Low problems, to achieve the effect of enhancing vibration amplitude and deformation beam, improving energy conversion efficiency, and increasing deformation

Inactive Publication Date: 2013-04-10
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention discloses a high-efficiency broadband vibration energy harvester with an elastic amplification mechanism to solve the problems of narrow operating frequency band and low energy conversion efficiency of existing piezoelectric energy harvesters, especially when the external vibration is relatively weak and the power generation capacity is low.

Method used

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  • Efficient wideband vibrating energy collector with elastic amplifying mechanism
  • Efficient wideband vibrating energy collector with elastic amplifying mechanism
  • Efficient wideband vibrating energy collector with elastic amplifying mechanism

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Embodiment

[0017] image 3 It is the comparison result of the output power of the high-efficiency broadband vibration energy harvester with elastic amplification mechanism (referred to as TDOF energy harvester) and the single cantilever beam vibration energy harvester (referred to as SDOF energy harvester) under different load resistances. It can be found that TDOF The maximum output power of the energy harvester is 511.7mW / g when the excitation frequency is 45.7Hz, the matching load resistance is 37kΩ and when the excitation frequency is 48.5Hz, the matching load resistance is 186kΩ 2 and 353.8mW / g 2 , while the maximum output power of the SDOF energy harvester under the same conditions above is 22.3mW / g 2 . In addition, the frequency bandwidth of the TDOF energy harvester reaches nearly 25Hz, while the frequency bandwidth of the SDOF energy harvester is only 8Hz.

[0018]The comparison results of the above embodiments can prove that the high-efficiency broadband vibration energy har...

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Abstract

The invention discloses an efficient wideband vibrating energy collector with an elastic amplifying mechanism and belongs to the technical field of new energy and power generation. The vibrating energy collector comprises a shell, the elastic amplifying mechanism, a cantilever beam piezoelectric vibrator and a spring-mass system, wherein the shell is formed in such a way that 4 lightweight metal plates are fixed between an upper end cover and a lower end cover through bolts to form a tetrahedron; U-shaped connecting seats for fixing the cantilever beam piezoelectric vibrator are arranged on the lightweight metal plates; the elastic amplifying mechanism comprises a spring element and a damping element; the elastic amplifying mechanism is fixed between a base and the shell through a bolt; the cantilever beam piezoelectric vibrator comprises an upper piezoelectric ceramic chip, a lower piezoelectric ceramic chip, a metal substrate and a magnet; the upper piezoelectric ceramic chip is bonded at the top of the metal substrate and the lower piezoelectric ceramic chip is bonded at the bottom of the metal substrate; one end of the metal substrate is fixed on the U-shaped connecting seat through a bolt; the magnet is mounted at the other end of the metal substrate; the spring-mass system comprises a tension spring, a pressure spring and mass block; one end of the tension spring is connected with the bottom surface of the upper end cover; one end of the pressure spring is connected with the top surface of the lower end cover; the other ends of the tension spring and the pressure spring are respectively connected with the mass block; the magnet is embedded on the periphery of the mass block; and reverse magnetic poles of the magnet at the end part of the piezoelectric vibrator and the magnet embedded on the periphery of the mass block are oppositely mounted. The efficient wideband vibrating energy collector with the elastic amplifying mechanism, disclosed by the invention, has the advantages that the amplitude of weak vibrating displacement of the base can be amplified, the power generating energy and conversion efficiency of the piezoelectric vibrator are increased and efficient wideband energy collection and conversion can be achieved.

Description

technical field [0001] The invention belongs to the technical field of new energy and power generation, and specifically relates to a high-efficiency broadband vibration energy harvester with an elastic amplifier, which is used to amplify the amplitude of the weak vibration displacement of the base, and improve the power generation energy and conversion efficiency of the piezoelectric vibrator. Realize high-efficiency, wide-band energy harvesting and conversion. Background technique [0002] In order to solve the self-power supply problem of wireless sensor network nodes and electronic equipment with small size, low cost and low power consumption, and reduce the pollution of waste electrochemical batteries to the environment, micro-energy harvesting technologies based on the principles of piezoelectricity, static electricity, and magnetoelectricity have been developed. It has become a research hotspot at home and abroad. As a unique form of energy in human daily life, vibra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18
Inventor 王光庆
Owner ZHEJIANG GONGSHANG UNIVERSITY
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