Variable air gap magnetostrictive vibration energy harvester and method therefor

Abstract

The invention discloses a variable-air-gap-type magnetostrictive vibration energy collector and a method thereof. The left side of a bottom plate of the vibration energy collector is vertically provided with a fixing support structure and the right side of the bottom plate is provided with a groove. A permanent magnet is vertically placed in the groove. The right side of the upper end of the fixing support structure is provided with a groove. A hinge displacement amplifying structure is vertically placed in the groove. The middle of the bottom plate is provided with a threaded hole. A lower tightening screw is arranged in the threaded hole. An upper fixing part and a magnetostrictive material are sequentially arranged between the hinge displacement amplifying structure and the lower tightening screw from top to bottom. A pickup coil evenly winds the surface of the magnetostrictive material. An air gap exists between the upper end face of the permanent magnet and the lower surface of the hinge displacement amplifying structure. The length of the air gap changes under the action of a vibration source. The collector can also be expanded to a vibration energy collector in which two or more kinds of magnetostrictive materials work independently. The collector is compact in structure, assembled parts are fewer and easy to replace, and the collector is applicable to collection of vibration energy for large-power electrical-energy output under a high-load vibration source.

Description

technical field [0001] The invention relates to a variable air-gap type magnetostrictive vibration energy collector and a method thereof, in particular to a small-sized variable air-gap length and high-load vibration energy collector that is easy to integrate. Background technique [0002] With the wide application of wireless sensors in sensor networks and micro-electromechanical systems, traditional batteries, which have disadvantages such as short service life, high maintenance costs, difficult replacement, and environmental pollution, have been difficult to meet their power supply needs. How to efficiently collect energy from the environment and realize the self-powered technology of wireless sensors has become a hot issue studied by scholars at home and abroad in recent years. Vibration energy is favored by researchers for its universality and high energy density. At the same time, the vibration energy harvester has the advantages of low cost, small size structure, lon...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the contradiction between large electric power output and small-volume structure and easy integration in the application of existing vibration energy harvesters, explore and develop a small, easy-to-integrate high-power, high-speed energy harvester suitable for high-load vibration environments. Performance Vibration energy harvester, providing guarantee for power supply performance, service life and system stability of self-powered technology in wireless sensor networks

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