Double-magnet multistable piezoelectric cantilever beam energy collector

Abstract

The invention discloses a double-magnet multistable piezoelectric cantilever beam energy collector. A base is in a concave shape, a left stand column and a right stand column are perpendicular to thebottom face of the base, a cantilever beam is fixed to the inner side of the left stand column, an annular magnet is fixed to the inner side of the right stand column, and a rectangular magnet is fixed to the free end of the cantilever beam. An upper layer of PZT piezoelectric ceramic and a lower layer of PZT piezoelectric ceramic are arranged close to the root of the cantilever beam, and each piezoelectric ceramic is provided with a wire used for outputting electric signals. The energy collector is determined to be in a three-stable state or a four-stable state according to the geometric dimensions of the cantilever beam, the annular magnet and the rectangular magnet and the distance between the two magnets. According to the invention, the technical characteristics of a three-stable stateor a four-stable state of the system are realized by only using the annular magnet and the rectangular magnet, a new technology is provided for the design and application of the vibration energy collector with the cantilever beam structure, the volume occupied by the collector is relatively reduced, and the volume energy collection density of the collector is improved.

Description

technical field [0001] The invention belongs to new energy collection technology, in particular to a device for collecting vibration energy and converting it into electric energy. Background technique [0002] Vibration phenomena are ubiquitous in the environment, such as vehicles running, the operation of various mechanical equipment, and even the walking of people. Because vibration energy is ubiquitous, vibration energy harvesters can be used as a new energy supply method. According to its working principle, the vibration energy harvesting system is mainly divided into three types: piezoelectric, electrostatic, and electromagnetic. Among them, the piezoelectric type uses the positive piezoelectric effect of the piezoelectric material to generate electrical energy. The piezoelectric crystal is subjected to the external vibration force to cause the flow of internal charges, thereby generating electrical signals or outputting electrical energy. [0003] A vibration energy h...

AI Technical Summary

Problems solved by technology

However, the conventional three-stable structure and four-stable structure must contain three rectangular magnets and four rectangular magnets, which must have more rectangular magnets while introducing more stable potential wells

The increase in the number of magnets not only increases the complexity of the system structure and the complexity of the system dynamics analysis, but also increases the volume of the energy harvester and relatively reduces the volumetric energy collection density.

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