Internal-resonance broadband vibration energy harvester of L-shaped beam structure

Abstract

The invention relates to an internal-resonance broadband vibration energy harvester of an L-shaped beam structure. The internal-resonance broadband vibration energy harvester is composed of the L-shaped beam, a piezoceramic wafer, a lower permanent magnet, an upper permanent magnet, a mass block, a lead-out circuit and an insulating base station. The lower end of the vertical beam body of the L-shaped beam is clamped through the insulating base station and connected to a structure needing to achieve vibration energy harvesting through the insulating base station. The piezoceramic wafer is fixed to the outer surface of the position, close to the lower fixed end, of the vertical beam body of the L-shaped beam. The lead-out circuit is connected to the piezoceramic wafer. The lower permanent magnet is fixed to the position, close to the right angle, of the horizontal beam body of the L-shaped beam. The upper magnet which is opposite in polarity with the lower permanent magnet is fixed to the position over the lower permanent magnet by a certain distance. The mass block is fixed to the free end of the horizontal beam body of the L-shaped beam. The energy harvester is portable and simple in structure and easy to implement, thereby being capable of being widely applied in the fields of automobiles, steamers and other machines.

Description

technical field [0001] The invention relates to an L-shaped beam structure internal resonance broadband vibration energy collector. Background technique [0002] Vibration energy is ubiquitous in various industrial mechanical vibrations. Vibration energy can be converted into electrical energy through energy harvesters to achieve the purpose of storing electrical energy or supplying power to electronic systems. A vibration energy harvester is a device that couples a mechanical oscillator to a circuit of an electromechanical conversion mechanism to achieve vibration energy harvesting. At present, it includes electromagnetic, piezoelectric or magnetoelectric. The study found that for the existing energy harvesters, there is still a narrow energy harvesting frequency bandwidth, and a small shift of the excitation frequency near the natural frequency of the energy harvester will greatly weaken the energy harvesting efficiency. The structure of the energy harvester is single, an...

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Problems solved by technology

[0003] Aiming at the defects existing in the prior art, the present invention proposes an L-shaped beam structure internal resonance broadband vibration energy harvester, the purpose of which is to solve the common problems of narrow energy collection frequency bandwidth and low energy collection efficiency in existing energy harvesters

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