Mini-piezoelectric wind energy collector with flexible support

Abstract

The invention discloses a mini-piezoelectric wind energy collector with a flexible support. The mini-piezoelectric wind energy collector comprises a micro-bracket, a piezoelectric composite beam, a flexible support and a base, wherein the piezoelectric composite beam is connected with the base through the flexible support and the micro-bracket; electrodes are respectively arranged on an upper surface and a lower surface of a piezoelectric layer of the piezoelectric composite beam; a dynamic wind load causes the mini-piezoelectric wind energy collector to vibrate; an electric potential difference is generated between the upper surface and the lower surface of the piezoelectric layer; and power supplied to the load or an energy storage device can be realized by using the electric potential difference. The flexible support introduced by the invention is used for reducing the natural frequency of the mini-piezoelectric wind energy collector and ensures that the mini-piezoelectric wind energy collector generates strong vibration at a slower wind speed, therefore, a critical wind speed of the collector in normal use can be effectively reduced.

Description

Technical field [0001] The invention belongs to the field of microelectromechanical systems (MEMS), and particularly relates to MEMS micro energy (Power MEMS) technology that converts environmental wind energy into electrical energy. Background technique [0002] Compared with traditional energy sources such as batteries, micro-energy sources based on MEMS technology that directly convert vibration energy, fluid kinetic energy, thermal energy, solar energy, etc. that exist in the environment into electrical energy have many advantages such as small size, long life, and easy integration. The ideal power source urgently needed by wireless sensor networks and micro-small autonomous micro-systems is the current international research focus on micro-energy. The micro-energy harvester based on the wind-induced vibration mechanism uses the micro-structure vibration caused by wind load to convert environmental wind energy into micro-structure vibration energy, and further uses electromag...

AI Technical Summary

Problems solved by technology

[0003] The electric energy output by the miniature vibrating wind energy harvester needs to go through rectification, energy storage and other links to supply power to the load. The above links need to consume part of the electric energy. When the output power of the collector is too low, most of the electric energy generated by it will be consumed by the above links. Difficult to be exploited by application objects

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