Bidirectional cantilever-type piezoelectric vibration energy collection device

Abstract

The invention belongs to the field of energy collection equipment, and discloses a bidirectional cantilever-type piezoelectric vibration energy collection device. The bidirectional cantilever-type piezoelectric vibration energy collection device comprises a horizontal engine base, a vertical engine base and two piezoelectric devices, wherein the vertical engine base is vertically arranged on the horizontal engine base, each piezoelectric device comprises a piezoelectric sheet clamping block, a magnet fixing block, a magnet and a piezoelectric sheet, a gap exists between the two magnets, magnetic poles at sides opposite to each other are dotted magnetic poles, so that the vibration amplitude of the piezoelectric sheet is amplified, and the collected energy is improved. By the two orthogonalpiezoelectric sheets with the magnets at tail ends and by an effect of a repulsive effect between the magnets, the deformation of the piezoelectric sheets can be caused during vertical vibration andhorizontal vibration, so that two-dimensional vibration energy can be collected, vibration enters a non-linear stage, and the collected energy is also improved.

Description

technical field [0001] The invention belongs to the field of energy harvesting equipment, and more specifically relates to a piezoelectric vibration energy harvesting device. Background technique [0002] With the development of sensor network hardware, methods to embed the network into various aeronautical, civil and mechanical infrastructures are economically and technologically possible. But the concept of "embedded" sensing doesn't quite work in situations where the system requires cables to access traditional power sources or batteries that need to be replaced from time to time. Hence the need to harvest and store energy to make these embedded systems as automated as possible. Although solar energy and wind energy are already mature technologies for energy harvesting on a large scale, the development of energy harvesting in small-scale, low-energy, embedded sensing systems is still in the development stage. [0003] Therefore, based on the principles of thermoelectric...

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Problems solved by technology

Harvesting vibration energy will have a very wide range of applications in wireless networks, embedded systems, and low-energy devices. However, traditional linear energy harvesters have a narrow operating frequency range and low energy harvesting efficiency, which is difficult to meet some occasions. Use requirements under

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