Bistable piezoelectric cantilever beam vibrator device

A technology of cantilever beam and voltage stabilization, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc., can solve the problems of low power generation efficiency and achieve high-efficiency capture and widening Resonant frequency band, effect of enhancing conversion efficiency

Inactive Publication Date: 2011-05-18
NAT UNIV OF DEFENSE TECH
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low power generation efficiency of the traditional linear piezoelectric cantilever vibrator under the broadband low-frequency vibration source, and to provide a bistable piezoelectric cantilever vibrator device, which can realize Efficient Vibration Power Generation

Method used

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  • Bistable piezoelectric cantilever beam vibrator device
  • Bistable piezoelectric cantilever beam vibrator device
  • Bistable piezoelectric cantilever beam vibrator device

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Embodiment Construction

[0018] The structure of the bistable electric cantilever beam vibrator device of the present invention is as follows: figure 1 As shown, it includes a base 1, an elastic matrix aluminum sheet 2, a piezoelectric ceramic PZT-5H sheet 3, an electrode 4, a rectangular permanent magnet 6 and 7 (model N35), and a quality block 5; one end of the aluminum sheet 2 is clamped on the A cantilever beam is formed on the base 1; the PZT-5H sheet 3 is pasted in series on the upper and lower surfaces of the aluminum sheet 2; the electrodes 4 are respectively plated on the upper and lower outer surfaces of the PZT-5H sheet 3; the permanent magnet 6 and the mass block 5 are pasted on The free end of the aluminum sheet 2; the permanent magnet 7 is fixed on the base 1, and the ends of the permanent magnets 6 and 7 with the same polarity are placed opposite each other; the external random vibration source acts on the base 1.

[0019] The elastic substrate can also use copper or nickel alloy.

[0...

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Abstract

The invention discloses a bistable piezoelectric cantilever beam vibrator device, which consists of a pedestal, piezoelectric ceramic, an elastic substrate, an electrode, a mass block and a pair of permanent magnets, wherein the piezoelectric ceramic is adhered to the elastic substrate; the electrode is plated on the piezoelectric ceramic; the mass block and a first permanent magnet are fixed at the free end of the elastic substrate; a second permanent magnet is arranged at a position, corresponding to the first permanent magnet, on the pedestal; and the first and second permanent magnets arearranged in a way that the same polarities are opposite. In the device provided by the invention, a piezoelectric cantilever beam vibrator can form a nonlinear bistable system by utilizing a nonlinear repulsive force between the permanent magnets, and can produce stochastic resonance phenomena under certain conditions to remarkably improve piezoelectric vibration generation efficiency in a broadband low-frequency vibration environment; and the device is particularly suitable for highly-efficiently capturing broadband, low-frequency and low-amplitude vibration energy.

Description

technical field [0001] The invention relates to the field of piezoelectric material vibration power generation, and in particular provides a bistable piezoelectric cantilever vibrator device oriented to a broadband low-frequency vibration source. Background technique [0002] In recent years, wireless sensor networks have been widely valued and more and more applied. It has an important strategic position in many fields such as ecological environment monitoring, equipment status monitoring, and battlefield situation awareness. But at the same time, how to effectively provide long-life and stable power for these wireless sensor nodes is the primary thorny issue. Collecting vibration energy in the environment and transforming it into electrical energy to realize autonomous power supply of wireless sensor nodes has been recognized as the most potential technical approach. Due to the unique piezoelectric effect characteristics of piezoelectric materials, the conversion of mecha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N11/00H02N2/02
Inventor 杨拥民陈仲生胡政骆彦廷陆智淼葛哲学杨定新
Owner NAT UNIV OF DEFENSE TECH
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