Low-frequency Bistable Composite Plate Piezoelectric Power Generation Device

Abstract

The invention discloses a low-frequency bistable composite material plate piezoelectric power generation device which is a device for converting vibration energy into electric energy. The device comprises a substrate, a piezoelectric layer, mass blocks and an electrode. The middle of the substrate is fixed on a base. The external vibration causes vibration of the substrate. The vibration of the substrate causes deformation of the piezoelectric layer. The deformation of the piezoelectric layer generates electric energy due to piezoelectric effect. The piezoelectric layer is not fully laid at the middle of the substrate at the specific proportion, and four corners of the substrate are bounded with the mass blocks, so that the device is enabled to have low vibration frequency and large amplitude, thereby reducing the resonance frequency without influencing the power generation efficiency of the device. With the non-linear characteristic of the bistable plate, the random resonance of the composite material plates occurs in the environment vibration excitation, the power generation efficiency is greatly improved, and the device can be used in the microelectromechanical system.

Description

technical field [0001] The invention relates to a low-frequency bistable composite material plate piezoelectric power generation device, which can effectively collect vibration mechanical energy in the surrounding environment for power generation, and belongs to the field of energy-saving technology and renewable environmental protection new energy. Background technique [0002] With the rapid development of micro-electromechanical technology, it has become an urgent need to capture energy from the environment to power low-power devices or batteries; traditional battery power supply has a series of disadvantages, such as short life, need to be replaced regularly, pollute the environment, etc. ; No matter which one of the drawbacks will seriously affect the development of microelectronics technology; therefore, it is necessary to use the energy generated by environmental vibrations to power electronic devices. [0003] Because the bistable plate has a jump behavior during the...

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Problems solved by technology

[0002] With the rapid development of micro-electromechanical technology, it has become an urgent need to capture energy from the environment to power low-power devices or batteries; traditional battery power supply has a series of disadvantages, such as short life, need to be replaced regularly, pollute the environment, etc. ; No matter which one of the disadvantages will seriously affect the development of microelectronics technology; therefore, it is necessary to use environmental vibration to generate energy for electronic equipment

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