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Multi-directional energy gathering apparatus based on piezoelectric material

A technology of vibration energy collection and piezoelectric materials, applied in circuit devices, battery circuit devices, piezoelectric effect/electrostrictive or magnetostrictive motors, etc., can solve problems such as performance degradation, achieve improved efficiency, and simple circuits , the effect of simple structure

Inactive Publication Date: 2009-01-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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Problems solved by technology

Even when installed with the prevailing environmental vibration directions in mind, the performance of the system will drop significantly if the environment changes

Method used

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  • Multi-directional energy gathering apparatus based on piezoelectric material
  • Multi-directional energy gathering apparatus based on piezoelectric material
  • Multi-directional energy gathering apparatus based on piezoelectric material

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Embodiment Construction

[0015] The energy harvesting device consists of two main parts. The first part is a structure that converts multi-directional mechanical vibration energy into electrical energy. The second part is a circuit part that stores electrical energy in energy storage elements. The following are respectively described:

[0016] Electromechanical conversion structure optimization

[0017] In the cube-ball structure that converts multi-directional mechanical vibration energy into electrical energy, such as figure 1 As shown, the cube bracket and the mass ball can be regarded as rigid bodies, and the stress and strain conditions in the energy conversion bar must be considered. Therefore, it is necessary to use ADAMS to establish a rigid-flexible hybrid dynamic model of the entire structure to simulate more complex dynamic situations, and The dynamic calculation results are sent to MSC.Nastran, and the dynamic response of the structure is studied in depth. Through the above analysis, the v...

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Abstract

A multi-direction vibration energy collection device which is based on piezoelectric materials belongs to the technical field of vibration energy collection. The multi-direction vibration energy collection device comprises an electro-mechanical conversion device which is composed of a three-dimensional support (1), a mass ball (2) and n energy conversion strips (3) that respectively connect the mass ball (2) to the three-dimensional support. The device further comprises a plurality of energy collection circuits which are connected in parallel and connected with a rechargeable battery and a multi-source heterogeneous charge control circuit that is constituted by a switch control circuit that is connected with the energy collection circuits. The device can efficiently collect the vibration energy under the situation of multi-direction vibration.

Description

technical field [0001] The invention relates to a device capable of converting external vibration energy into electric energy, especially in different vibration environments, the device can effectively collect multi-directional vibration energy. The patent belongs to the technical field of vibration energy harvesting. Background technique [0002] At present, the energy collected by existing vibration energy recovery devices is mainly in one direction, such as cantilever beam structure, bimorph structure, circular membrane structure, etc., which have strong direction selectivity. In the case of random vibration in various directions , the energy collected by this method will be very limited. Another problem brought about by the selectivity of the direction is that when installing the energy harvester, attention must be paid to the direction of the environmental vibration, which sometimes requires professionals to complete. Even when installed with the prevailing environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18H02J7/00
Inventor 陈仁文李彬
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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