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Composite vibration energy collector

A vibration energy harvesting and composite technology, applied in the direction of electric components, generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, etc., can solve the problem of single output characteristics, achieve wide working bandwidth, Easy to operate and improve work efficiency

Active Publication Date: 2020-08-21
HENAN UNIVERSITY OF TECHNOLOGY
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a composite vibration energy harvester, which combines the three energy conversion mechanisms of electromagnetic, piezoelectric and frictional electricity, effectively avoiding the problems of single output characteristics and large use limitations. Improving Energy Conversion Efficiency of Vibration Energy Harvesters

Method used

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  • Composite vibration energy collector
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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing.

[0023] Such as Figure 1-Figure 4 As shown, a composite vibration energy harvester includes a shell 1, end caps 7 are fixed on the upper and lower ends of the shell 1, and at least three depth adjustment mechanisms 2 are evenly distributed along the circumferential direction on the circumferential wall of the shell. The number of mechanisms can be three, four, six or eight, etc. The inner end of the depth adjustment mechanism 2 is fixedly connected with a piezoelectric beam 3, and the inner end of the piezoelectric beam 3 is fixedly connected with an elastic membrane 4, and the elastic membrane 4 The upper and lower sides of the housing are fixedly connected with a moving magnet 5, and a frictional electricity generating mechanism 6 is provided between the two moving magnets and the end cover on the same side, and an induction coil 8 is provided on the outer periphery of th...

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Abstract

The invention relates to a composite vibration energy collector. The collector includes a shell, end covers are fixed at the upper and lower ends of the shell; at least three depth adjusting mechanisms are evenly distributed on the circumferential wall of the shell in the circumferential direction. A piezoelectric beam is fixedly connected to the inner end of each depth adjusting mechanism, an elastic film is fixedly connected to the inner end of the piezoelectric beam, movable magnets are fixedly connected to the upper face and the lower face of the elastic film, friction power generation mechanisms are arranged between the two movable magnets and the end covers on the same side, and an induction coil is arranged in the periphery of the shell. According to the invention, the piezoelectricbeam, the elastic film, the friction power generation mechanism and the induction coil form the composite vibration energy collector, and three transduction mechanisms of electromagnetism, piezoelectricity and friction power generation are coupled in the system, so that advantage complementation is realized, the working efficiency of the energy collector is improved, and the output characteristics of the energy collector are enriched; and by means of a two-degree-of-freedom vibration system, collision and nonlinear magnetic force are utilized to enable the vibration energy collector to have awider working bandwidth.

Description

technical field [0001] The invention relates to the technical field of energy harvesters, in particular to a composite vibration energy harvester. Background technique [0002] As an emerging information exchange technology, wireless sensor network technology has broad application prospects in the fields of national defense security, medical monitoring, and environmental monitoring. It requires a large number of chemical batteries to power wireless sensor nodes for a long time, but chemical batteries are ubiquitous. Due to the problems of short life and limited energy storage, it is difficult to maintain the normal operation of wireless sensor nodes for a long time, and regular battery replacement or charging is required. However, it is difficult to achieve some working scenarios where secondary access is difficult, nodes are scattered, and the environment is harsh. [0003] Vibration energy harvesters can convert vibration energy widely present in the environment into elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K35/02H02K5/04H02N2/18H02N1/04
CPCH02K35/02H02K5/04H02N2/186H02N1/04
Inventor 张坤康克家冯伟刘保国常永
Owner HENAN UNIVERSITY OF TECHNOLOGY
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