Generator utilizing acoustic energy and sound transducer

Abstract

The invention provides a generator utilizing acoustic energy, and a sound transducer. In the generator, a triboelectric nano power generation part is arranged in the cavity of an acoustic resonator; the cavity of the acoustic resonator can collect extraneous sound waves and allow the sound waves to generate resonance and converge to form standing waves in the cavity; two sides of the elastic membrane structure of the triboelectric nano power generation part form a sound pressure difference; electric signals are outputted to the outside in a contact separation process between a first electrode layer and a frictional layer. The generator does not need to be additionally provided with a vibrating diaphragm, thereby reducing unnecessary acoustic energy loss, and increasing acoustic energy utilization efficiency. The generator can also be used as a sound transducer which does not need a power supply and is a self-driven passive sound transducer.

Description

technical field [0001] The invention relates to a generator, in particular to a generator utilizing sound energy, and a sound sensor using the generator. Background technique [0002] When the energy consumption of electronic circuits is reduced from milliwatts to microwatts, powering the circuits no longer requires grids or batteries, but uses various environmental energy sources around them, such as kinetic energy (wind, waves, gravity, vibration, etc.) , electromagnetic energy (light, electromagnetic waves, etc.), thermal energy (solar thermal energy, geothermal energy, temperature change, combustion, etc.), atomic energy (nuclear energy, radioactive decay, etc.) or biological energy (biofuel, biomass energy, etc.), through photovoltaic, thermoelectric , piezoelectric, electromagnetic and other physical or chemical effects convert environmental energy into electrical energy that can be used to power electronic circuits. Because the energy harvester does not need to consu...

AI Technical Summary

Problems solved by technology

In daily life, we are surrounded by sounds such as speech, noise or music. The longitudinal sound waves propagating in the surrounding air, the compression waves, are generated by the alternating pressure waves that deviate from the equilibrium pressure. This wave causes the compression of the local area. And thinning, if the sound energy from speech, music or various noises can be converted into electrical energy, it will promote the wider application of energy harvesting technology. At present, there is no device that can collect the energy of this sound in the environment and convert it into electrical energy

Especially for the sensing of this kind of sound in the environment, the currently widely used electret / capacitive sensors have the characteristics of wide frequency range, high sensitivity, and small distortion, but still must rely on DC power supply to perform impedance transformation, that is, external The power supply supplies power to the acoustic sensor, which not only makes the use of the sensor inconvenient, but also limits the application range

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