Piezoelectric vibration energy collection device

Abstract

The invention discloses a piezoelectric vibration energy collection device. The piezoelectric vibration energy collection device comprises a cantilever bimorph vibrator, a quality block, a first linear spring, a second linear spring, a base, a first hinge, a second hinge and a third hinge, one end of the cantilever bimorph vibrator is fixedly connected with a first support plate of the base, the other end of the cantilever bimorph vibrator is bonded with the quality block, the first hinge is arranged in the center of the quality block, the first hinge is connected with one end of the first linear spring and one end of the second linear spring separately, the second hinge and the third hinge are separately arranged on a second support plate of the base, the second hinge and the third hingeare respectively connected with the other end of the first linear spring and the other end of the second linear spring, the first hinge, the second hinge and the third hinge are in the same vertical plane and form an isosceles triangle, and the second hinge and the third hinge are symmetrically distributed on the second support plate with the cantilever bimorph vibrator as the center. The piezoelectric vibration energy collection device can perform periodic vibration drastically and easily even under conditions of low environment excitation strength and no strong magnetic field impact, and cancollect environment vibration energy under broadband efficiently.

Description

Technical field [0001] The invention relates to the field of power generation technology, and in particular to a piezoelectric vibration energy harvesting device. Background technique [0002] Piezoelectric vibration energy harvester is a new type of electromechanical energy conversion device that collects and converts mechanical vibration energy in the environment into electrical energy, and can be used to power low-power electronic products. The steady-state piezoelectric vibration energy harvesters currently developed mainly include linear single-frequency piezoelectric vibration energy harvesters and bistable piezoelectric vibration energy harvesters. The working frequency of linear single frequency piezoelectric vibration energy harvester is relatively narrow, and the energy harvesting efficiency is low; the working frequency bandwidth of bistable piezoelectric vibration energy harvester, the energy harvester has high efficiency, but its output performance is affected by the...

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Problems solved by technology

The operating frequency of the linear single-frequency piezoelectric vibration energy harvester is relatively narrow, and the energy harvesting efficiency is low; the operating frequency band of the bistable piezoelectric vibration energy harvester is wide, and the efficiency of the energy harvester is high, but its output performance is affected by the intensity of environmental vibration Large, when the environmental vibration intensity is large enough, the bistable vibration is excited to produce a large conversion output; when the environmental vibration intensity is small, the bistable piezoelectric vibration energy harvester acts as a small-amplitude monostable vibration in the trap, This greatly reduces the output of the bistable piezoelectric vibration energy harvester

In addition, the currently developed bistable and tristable piezoelectric vibration energy harvesters are mainly magnet-

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