Cantilever-type piezoelectric generator with adjustable base frequency resonant frequency

A resonant frequency and generator technology, which is applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problem of narrow application range and unadjustable vibration frequency of piezoelectric vibrator, etc. problem, to achieve the effect of improving the scope of application

Inactive Publication Date: 2012-04-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing piezoelectric generators use cantilever-type piezoelectric vibrators. The mass block is fixed on the free end of the cantilever beam. The v

Method used

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  • Cantilever-type piezoelectric generator with adjustable base frequency resonant frequency
  • Cantilever-type piezoelectric generator with adjustable base frequency resonant frequency
  • Cantilever-type piezoelectric generator with adjustable base frequency resonant frequency

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Embodiment Construction

[0016] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:

[0017] Such as figure 1 The shown bimorph cantilever piezoelectric generator model with adjustable fundamental frequency resonance frequency includes: clamping device 9, elastic layer 1, piezoelectric layers 2 and 3, U-shaped groove 11, mass block 6, and elastic layer 1 And the piezoelectric layers 2 and 13 constitute the cantilever beam of the cantilever piezoelectric generator with adjustable fundamental frequency resonance frequency, the part of the elastic layer 1 beyond the piezoelectric layers 2 and 3 is inserted into the clamping device 9, and the U-shaped groove 11 is fixed At the free end of the cantilever beam, the mass block 6 is fixed in the bolt 12 through the bolt 12 at the center of the U-shaped groove 11 . The mass block 6 has the same length as the U-shaped groove. The slidable distance of the mass block 6 in the U-shaped groove 11 is about half...

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Abstract

The invention relates to a piezoelectric generator, and in particular relates to a cantilever-type piezoelectric generator with adjustable base frequency resonant frequency. The cantilever-type piezoelectric generator comprises a clamping device, a piezoelectric layer, a bonding layer, an elastic layer, a U-shaped groove and a mass block, wherein the piezoelectric layer and the elastic layer form a cantilever beam of the cantilever-type piezoelectric generator; the fixed end of the cantilever beam is inserted into the clamping device; the U-shape groove is fixed at the free end of the cantilever beam; and the mass block is fixed in the U-shape groove through a bolt at the center of the U-shaped groove. The effective rigidity of the cantilever beam is changed through the horizontally sliding mass block, so the fundamental resonant frequency of the piezoelectric generator is regulated. By using the cantilever-type piezoelectric generator with adjustable base frequency resonant frequency provided by the invention, energy collection from ambient vibrations with different vibration frequencies is achieved, and the applied range of the piezoelectric vibration generator is broadened.

Description

technical field [0001] The invention relates to a piezoelectric generator, in particular to a cantilever piezoelectric generator with adjustable fundamental frequency resonance frequency. Background technique [0002] With the advent of the information age, wireless sensors have been widely used in various industries. Existing wireless sensors mainly rely on batteries for power supply. Due to the limited battery capacity, in order to maintain the normal operation of the sensors, the batteries need to be replaced regularly. How to continuously and reliably supply power to sensors has become the focus of research. There is abundant vibration energy in the environment, and roads, bridges, buildings and various electrical equipment will vibrate. The piezoelectric vibration generator using the piezoelectric effect can collect and convert the vibration energy in the environment into electrical energy, and then supply power to the sensor, thereby providing a stable, reliable and ...

Claims

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Application Information

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IPC IPC(8): H02N2/18
Inventor 邹玉炜黄学良谭林林
Owner SOUTHEAST UNIV
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