Automatic parameter regulating bistable-state piezoelectric power generation structure

A piezoelectric power generation and bistable technology, applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve the problem that the degree of bandwidth expansion is not very large, To achieve the effect of low resonance frequency

Inactive Publication Date: 2015-02-25
BEIJING UNIV OF TECH
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Problems solved by technology

US patent (publication number WO2010151738A3) discloses a bistable piezoelectric cantilever beam power generation device, which effectively widens the resonance frequency band of the cantilever beam, but the degree of bandwidth expansion is not very large

Method used

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  • Automatic parameter regulating bistable-state piezoelectric power generation structure

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Embodiment Construction

[0016] The present invention will be further described in detail below in combination with specific embodiments.

[0017] like figure 1 As shown, the automatic parameter adjustment bistable piezoelectric power generation structure includes a lead wire 1 , a piezoelectric layer 2 , a base layer 3 , a first permanent magnet 4 , a second permanent magnet 5 , and a spring 6 . The two lead wires 1 are respectively drawn from the upper surface of the piezoelectric layer 2 and the base layer 3; the piezoelectric layer 2 and the base layer 3 are glued together by epoxy resin or other conductive glue; the first The permanent magnet 4 and the second permanent magnet 5 are placed mutually repelling; the second permanent magnet 5 is fixed by a spring 6; the spring 6 is a compression spring, and the stiffness of the spring 6 is moderately small.

[0018] The material of the piezoelectric layer 2 is one of piezoelectric ceramics or piezoelectric fiber composite material or PVDF piezoelectr...

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Abstract

Disclosed is an automatic parameter regulating bistable-state piezoelectric power generation structure. Two leads are led out of the upper surface of a piezoelectric layer and a base layer respectively. The piezoelectric layer and the base layer are pasted through epoxy resin glue or other conductive glue. A first permanent magnet and a second permanent magnet are placed in a mutually exclusive mode. The second permanent magnet is fixed through a spring. The spring is a pressure spring, and the rigidity of the spring is smaller than medium. On the basis of the bistable-state piezoelectric power generation structure, the spring is added, the distance between the first permanent magnet and the second permanent magnet has variability, under the condition of giving external excitation, the position of the second permanent magnet can be changed along with the change of the position of the first second permanent magnet, and the effect of automatically adjusting the distance between the magnets is achieved. The work frequency domain of the structure is wide, and compared with a common bistable-state piezoelectric power generation structure, power generation efficiency and the power generation amount of unit time are obviously improved.

Description

technical field [0001] The invention relates to a bistable piezoelectric power generation structure with automatic parameter adjustment, which can effectively collect vibration mechanical energy in the surrounding environment for power generation, and belongs to the field of green energy utilization. Background technique [0002] With the continuous advancement of radio communication and microelectronics technology, the application range of microsystems such as microelectronics equipment and microsensors continues to expand. Because these devices are portable, they must have their own power supply. The performance, quality, capacity and life of the power supply are the key points for most microelectronic technology applications at present. The traditional battery power supply method has the disadvantages of short life, frequent replacement, limited energy storage, etc., and the process of replacing the battery is complicated under certain conditions. Therefore, it is necess...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18
Inventor 姚明辉李印波张伟
Owner BEIJING UNIV OF TECH
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