Multilayer beam type piezoelectric generator and power generation method thereof

Abstract

The invention provides a multilayer beam type piezoelectric generator, comprising a plurality of piezoelectric composite boards. The piezoelectric composite boards comprise piezoelectric elements and elastic metallic objects. The piezoelectric elements are respectively connected with the upper and lower surfaces of the elastic metallic objects. One end of each piezoelectric composite board is fixedly connected with racks and the other end thereof is rigidly connected with force transfer blocks. The piezoelectric composite boards are rigidly connected with each other by the force transfer blocks and are distributed in prismoid or cuboid arrays. The invention also provides a power generation method realized by the generator, which is characterized in that bending elasticity deformation of the elastic metallic objects is converted into piezoelectric effects of the piezoelectric elements to form alternating potential; and the alternating potential is rectified and transformed to output direct current or store the direct current. The invention has the advantages of simple structure, large charge generation, higher piezoelectric conversion efficiency, high rigidity, no electromagnetic field effect, small volume and combination in series or in parallel, and can convert the vibrational energy into useful electric energy to be stored into a capacitor or a rechargeable battery to be used.

Description

Technical field [0001] The invention belongs to the technical field of generators, and particularly relates to a piezoelectric generator and a power generation method thereof. Background technique [0002] A piezoelectric generator is an energy conversion device that uses the piezoelectric effect of piezoelectric ceramics to convert mechanical vibration into electrical energy. It has the advantages of simple structure, light weight, no noise, and reliable operation. It has been used in many fields. Especially used in wireless networks in the field of optoelectronics technology. At present, the existing piezoelectric generators generally use a single circular piezoelectric composite plate to generate electricity. Although this structure has the advantages of easy power generation and simple structure, because it uses a single piezoelectric composite plate, it cannot carry Excessive alternating load is used to generate electricity, and the defects such as small amount of charge, l...

AI Technical Summary

Problems solved by technology

At present, the existing piezoelectric generators generally use a single circular piezoelectric composite plate to generate electricity. Although this structure has the advantages of easy power generation and simple structure, it cannot carry the load due to the use of a single piezoelectric composite plate. Excessive alternating loads to generate electricity generally have defects such as small amount of charge generated, low power, low stiffness, small carrying capacity, and low piezoelectric conversion efficiency.

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