A piezoelectric multi-directional vibration energy harvesting device

Abstract

The present invention provides a piezoelectric type multidirectional vibration energy collection device. The device solves the technical problem in the prior art that an existing piezoelectric energy collecting device is single in energy collection direction and narrow in frequency bandwidth. The device comprises a fixed seat, a bracket arranged on the fixed seat, an inner beam, an outer beam, an elastic element, a supporting rod, an annular element, a first magnetic block and a second magnetic block. The inner beam comprises a first elastic substrate, a first piezoelectric patch adhered to the fixed end of the first elastic substrate, and a first electrode adhered to the first piezoelectric patch. The outer beam comprises a second elastic substrate, a second piezoelectric patch adhered to the fixed end of the second elastic substrate, and a second electrode adhered to the second piezoelectric patch. The second elastic substrate is fixed on the bracket. The first elastic substrate, the elastic element and the supporting rod are positioned in the notch of the second elastic substrate. The first elastic substrate and the second elastic substrate are vertical to each other. The fixed end of the first elastic substrate is fixed to the free end of the elastic element and is hung on the free end of the supporting rod through the annular element.

Description

technical field [0001] The invention belongs to the technical field of energy collection, and relates to an energy collection device, in particular to a piezoelectric multi-directional vibration energy collection device, which can be used to collect multi-directional vibration energy and complex vibration energy. Background technique [0002] Energy harvesting devices can obtain energy from the surrounding environment and convert it into electrical energy, achieving the purpose of energy recovery and reuse. With the rapid development of wireless sensor technology and microelectronics technology, the demand for micro energy is becoming more and more urgent. The traditional battery-powered mode has brought a lot of inconvenience to human production and life due to frequent replacement of batteries and high maintenance costs. The energy harvesting device can collect and reuse unused energy in the environment, so as to provide self-power for low-power electronic equipment and d...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned defects in the prior art, and propose a piezoelectric multi-directional vibration energy harvesting device, which is used to solve the existing problems in the existing piezoelectric vibration energy harvesting device due to the single direction of energy collection and the frequency band The technical problem of low energy harvesting efficiency caused by small width

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