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MEMS wideband piezoelectricity energy collector based on bistable state frequency raising structure

A technology of piezoelectric energy and bistable state, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc., can solve the problems of narrow operating frequency band and high natural frequency, and achieve The effect of easy production, reduced volume and simple structure

Inactive Publication Date: 2010-02-24
SHANGHAI JIAO TONG UNIV
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  • Abstract
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, and propose a MEMS broadband piezoelectric energy harvester based on a bistable frequency-up structure, so that the piezoelectric transducer element can obtain a larger output power in a low-frequency vibration environment to solve the problem of Traditional MEMS piezoelectric energy harvesters have problems such as narrow operating frequency band and high natural frequency

Method used

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  • MEMS wideband piezoelectricity energy collector based on bistable state frequency raising structure
  • MEMS wideband piezoelectricity energy collector based on bistable state frequency raising structure

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Embodiment Construction

[0021] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0022] Such as figure 1 As shown, this embodiment includes: frame 1, bistable beam 2, permanent magnet 3, piezoelectric cantilever beam 4 and soft magnet 5, bistable beam 2, permanent magnet 3, piezoelectric cantilever beam 4 and soft magnet 5 Both are arranged inside the frame 1. The permanent magnet 3 is adhered to the middle of the lower surface of the bistable beam 2 . The piezoelectric cantilever beam 4 is made of piezoelectric material. The piezoelectric cantilever beam 4 includes three layers, the middle layer is a metal layer, the upper layer and the lower l...

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Abstract

The invention relates to an MEMS wideband piezoelectricity energy collector based on a bistable state frequency raising structure in the technical field of electric appliances, which comprises a frame, a bistable state beam arranged in the frame, a piezoelectric over hanging beam, a permanent magnet and a soft magnet. The MEMS wideband piezoelectricity energy collector is characterized in that twoends of the bistable state beam are both fixed on the frame, the permanent magnet is attached to the bistable state beam, on end of the piezoelectric over hanging beam is fixed on the frame, and thesoft magnet is arranged on the piezoelectric over hanging beam. The invention adopts a bistable state frequency raising structure to enable a piezoelectric transduction component to obtain greater output power in a low-frequency vibration environment. Compared with the prior MEMS piezoelectric energy collector, the invention has simple structure, easy manufacture and volume reduction, can be operated in a low-frequency environment, and can output stable frequency within wider environment vibration frequency range.

Description

technical field [0001] The invention relates to a device in the field of energy technology, in particular to a MEMS broadband piezoelectric energy harvester based on a bistable up-frequency structure. Background technique [0002] Micro-Electro-Mechanical Systems (MEMS: Micro-Electro-Mechanical Systems) is an emerging research field developed on the basis of microelectronics technology, integrating micro-machines, micro-sensors, micro-actuators, signal processing, and intelligent control. With the rapid development of low-power, self-contained systems such as wireless sensor networks, embedded smart structures, and wearable health monitoring, there is an increasing demand for long-life independent power supply technologies. At present, environmental vibration energy harvesting technology is an effective method to solve the above problems. The micro-piezoelectric power generation device designed and manufactured based on the piezoelectric effect of piezoelectric materials ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18
Inventor 刘景全唐刚杨春生芮岳峰闫肖肖
Owner SHANGHAI JIAO TONG UNIV
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