Composite structure piezoelectric energy collector driven by cantilever

An energy harvester and composite structure technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc. , uneven stress distribution and other problems, to achieve the effect of convenient adjustment of resonance frequency, high energy density, and improved energy density

Inactive Publication Date: 2013-07-10
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

However, the piezoelectric transducers with the existing cantilever beam structure have the defect of low energy density; because in the cantilever beam structure, the stress distribution inside the piezoelectric material is not uniform
The stress at the fixed end is the largest, while the stress at the free end is 0, which limits the performance of the piezoelectric material at the free end.

Method used

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  • Composite structure piezoelectric energy collector driven by cantilever
  • Composite structure piezoelectric energy collector driven by cantilever

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Embodiment Construction

[0038] The purpose, features and advantages of the present invention can be better understood through the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0039] figure 1 A first embodiment of the piezoelectric energy harvester of the present invention is shown. Such as figure 1 As shown, the piezoelectric energy harvester includes a cantilever beam 1 extending laterally, one end of the cantilever beam 1 is a fixed end fixed to a base 2 , and the other end of the cantilever beam 1 is a free end. A pair of cymbal structure piezoelectric transducers 3 are respectively symmetrically arranged on the upper surface and the lower surface of the cantilever beam 1 at the fixed end of the cantilever beam 1 . By arranging the pair of piezoelectric transducers 3 symmetrically on the upper and lower surfaces of the cantilever beam, the tensile stress and compressive stress generated during the up and dow...

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PUM

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Abstract

The invention relates to a composite structure piezoelectric energy collector driven by a cantilever. The energy collector comprises a cantilever member and an output unit used for output of generated electric energy output, one end of the cantilever is a fixed end which is fixed on a base, the other end of the cantilever is a free end, a pair of piezoelectric energy converting units are respectively symmetrically arranged on the portions, near the fixed end of the cantilever member, of the upper surface and the lower surface of the cantilever member, and the piezoelectric energy converting units are driven by vibration of the cantilever member to generate electric energy.

Description

technical field [0001] The invention relates to the fields of piezoelectric energy collection and novel energy devices, and more specifically, relates to a piezoelectric energy harvester with a composite structure driven by a cantilever beam that can collect environmental vibration energy. Background technique [0002] Energy and the environment are the two most important themes that human beings pay attention to in the 21st century. With the development of the economy, fossil energy resources such as coal and oil are decreasing due to continuous consumption. Therefore, countries all over the world are vigorously developing various renewable energy sources, hoping to collect and convert energy that can be recycled in the environment. Piezoelectric energy harvester is a device that realizes this function. It uses the positive piezoelectric effect of piezoelectric materials to collect various vibration energies in the environment and convert them into electrical energy. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18
Inventor 罗豪甦许春东王东赵祥永任博狄文宁李晓兵徐海清林迪王升梁柱郭浩
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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