Two-dimensional piezoelectric electromagnetic hybrid energy harvester

Abstract

The invention belongs to the technical field of renewable energy sources and micro-miniature power generation, and particularly relates to a two-dimensional piezoelectric electromagnetic hybrid energyharvester which at least comprises piezoelectric cantilever beams, a magnet, a frame, a coil, a cylinder, a fixed clamp and a spring; wherein the piezoelectric cantilever beams comprise a first piezoelectric cantilever beam and a second piezoelectric cantilever beam, the fixed ends of the piezoelectric cantilever beams are fixedly connected with the vertical wall of the frame, and the free ends of the piezoelectric cantilever beams are fixedly connected with the magnet; the piezoelectric cantilever beams and the magnet form a piezoelectric energy harvester; the coil is formed by winding an enameled wire along the right half part of the outer wall of the cylinder; the cylinder is fixedly connected with the vertical wall of the frame; and the fixed clamp, the magnet, the spring and the coilform an electromagnetic energy harvester. The two-dimensional piezoelectric electromagnetic hybrid energy harvester is simple and compact in structure. Vibration energy can be collected from two orthogonal directions, and the energy collection efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of renewable energy and micro power generation, in particular to a two-dimensional hybrid energy harvester based on piezoelectric effect and electromagnetic induction effect, which is suitable for micro sensors, micro actuators, wireless transceivers, wearable electronics Devices and other low-power devices that need to capture energy from the external environment for energy supplementation. Background technique [0002] The rapid development of modern electronic information technology and Internet technology has promoted the continuous emergence of various wireless sensors, miniature signal transmitters, miniature signal receivers, and wearable electronic devices. Currently, these low-power devices are powered primarily by electrochemical batteries. Batteries have limited energy storage and need to be replaced or recharged periodically. When these devices work in some special occasions, such as remote mou...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a two-dimensional piezoelectric-electromagnetic hybrid energy harvester with simple and compact structure, wide application range, and bidirectional collection capability, so as to overcome the existing piezoelectric, electromagnetic The output power of piezoelectric and electromagnetic hybrid energy harvesters is low, and they can only collect vibration energy from a single direction.

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