Piezoelectric-electromagnetic sound energy power generation device

Abstract

The invention aims to provide a piezoelectric- electromagnetic sound energy power generation device which comprises a sound power generation module, the sound power generation module comprises a conical sound receiver, a Helmholtz resonator, a cantilever beam and a permanent magnet, the opening end of the conical sound receiver faces the environment, and the Helmholtz resonator comprises a neck and a cavity which are communicated with each other. A small opening is formed in the tail end of the conical sound receiver and connected with the neck of the Helmholtz resonator, a first piezoelectricfilm is installed in a cavity of the Helmholtz resonator, a cantilever beam is connected to the lower portion of the Helmholtz resonator, the cantilever beam comprises a vertical part and a horizontal part which are connected, a second piezoelectric film is installed on the horizontal part, and a permanent magnet is arranged at the end of the horizontal part. A power generation coil is arranged outside the permanent magnet. Generation of electric energy is composed of three parts, the efficiency of converting sound energy into electric energy is improved, the power generation efficiency of asingle device can reach 0.4 W, and the power generation efficiency is improved compared with the power generation efficiency of a single sound power generation technology.

Description

technical field [0001] The invention relates to a power generating device. Background technique [0002] In recent years, there have been more and more technologies and equipment for generating electricity using various energies, but people often ignore that sound is also a form of energy. Insufficient research on sound energy generation, low efficiency of sound energy utilization and other factors restrict sound energy generation. The popularization and application of technology has caused a lot of energy loss. At the same time, high-energy, high-decibel sounds aggravate noise pollution, causing life troubles and health hazards to people. The power generation system of sound power generation includes a sound collection device, a transducer and an integrated circuit system. Among them, the sound collection device mostly uses a Helmholtz resonator, which uses the resonance effect to amplify the sound wave. There are currently three types of transducers, electromagnetic, pi...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the current sound power generation technology has a single power generation method, and there are problems such as low efficiency of sound energy utilization and large volume of sound power generation devices.

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