Wide-frequency-band multi-direction vibration energy harvester

Abstract

The invention relates to a wide-frequency-band multi-direction vibration energy harvester and belongs to the technical field of new energy and power generation. A shell comprises six metal sheets, an upper cover plate and a lower cover plate. The upper end and the lower end of each metal sheet are fixed between the upper plate and the lower plate through right-angled fixing plates and screws respectively. Each metal sheet is provided with a connecting seat for fixing a piezoelectric vibrator, and the piezoelectric vibrators are fixed on the connecting seats through screws. Each piezoelectric vibrator is in a T-shaped structure composed of a horizontal cantilever beam and two vertical cantilever beams, each cantilever beam is formed by adhering a metal substrate and a piezoelectric chip, one end of each horizontal cantilever beam is fixed on a metal sheet connecting seat through screws, a metal mass block is mounted at the other end of each horizontal cantilever beam, one ends of each two vertical cantilever beams are fixed on a metal block at the tail end of the corresponding horizontal cantilever beam, and magnets are disposed at the other ends of each two vertical cantilever beams. Magnets are disposed on the upper cover plate and the lower cover plate of the shell. The magnets at the tail ends of each two vertical cantilever beams are disposed opposite to like poles of the magnets on the upper cover plate and the lower cover plate. The wide-frequency-band multi-direction vibration energy harvester has the advantages that wide-frequency-band multi-direction and low-frequency vibration energy harvesting can be achieved.

Description

technical field [0001] The invention belongs to the technical field of new energy and power generation, and in particular relates to a broadband multi-directional vibration energy collector, which is used for broadband, multi-directional and low-frequency vibration energy collection. Background technique [0002] In order to meet the self-power supply requirements of micro-miniature low-power electronic products and wireless sensor network nodes, and reduce the pollution of waste electrochemical batteries to the environment, micro-environmental energy based on the principles of piezoelectricity, static electricity, magnetoelectricity, and piezoelectricity and magnetoelectricity The research on the collector has become a hot spot both at home and abroad. Due to the advantages of simple structure, easy fabrication, easy miniaturization and integration, and high energy conversion density, piezoelectric vibration energy harvesters have broad application prospects. At present, th...

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Problems solved by technology

[0004] The present invention proposes a broadband multi-directional vibration energy harvester to solve the problems of existing piezoelectric energy harvesting devices such as narrow operating frequency band, high resonance frequency, and inability to collect multi-directional vibration energy.

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