Lever type vibration energy harvester based on giant magnetostrictive film

Abstract

The invention discloses a lever-type vibration energy collector based on a giant magnetostriction film. According to one technical scheme, the collector comprises two giant magnetostriction film resonators, a lever, a hinge support, electromagnets, an upper spring, a lower spring and a box. The two giant magnetostriction film resonators are located on the same side of the lever, the middle point of the lever is connected with the hinge support through a pin, the end, located between the two giant magnetostriction film resonators, of the lever is provided with the first electromagnet, and the other end of the lever is connected between the upper spring and the lower spring in series. According to another technical scheme, the upper spring and the lower spring are replaced with magnet pairs, one end, where the magnet pairs are located, of the lever is provided with the electromagnets which attract each other. According to the collector, the two giant magnetostriction film resonators are symmetrically arranged at one end of the lever longitudinally, each time the lever swings, the two giant magnetostriction film resonators can be excited, and accordingly energy collection efficiency is greatly improved.

Description

technical field [0001] The invention relates to an energy harvesting device, in particular to a lever type vibration energy harvester based on a giant magnetostrictive film. Background technique [0002] In recent years, with the continuous development of radio communication and micro-electro-mechanical system (Micro-electro-mechanical System, MEMS) technology, the application range of micro-electro-mechanical devices such as micro-electronic devices, micro-sensors and portable electronic devices has continued to expand, especially in embedded It has been widely used in system, human health detection system, environmental control system, field animal tracking device, and military security application system. Typically, these devices rely on traditional batteries for power, such as Li-polymer batteries, Ni-MH batteries, etc. However, there are obvious defects in traditional batteries: First, compared with MEMS, its volume is still relatively large, which limits the further m...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem of low conversion efficiency of existing vibration energy harvesting devices under low-frequency vibrations, and proposes a high-efficiency lever-type vibration energy harvester based on giant magnetostrictive films

Images