Sound energy collector by adopting phonon crystal and electromechanical Helmholtz resonator

Abstract

A sound energy collector by adopting a phonon crystal and an electromechanical Helmholtz resonator, which comprises an electromechanical Helmholtz resonator, a phonon crystal resonant cavity (1), a support column (4) and a base (5), wherein the electromechanical Helmholtz resonator comprises a composite piezoelectric transducer (3) and a Helmholtz resonant cavity (2); the electromechanical Helmholtz resonator is located in the middle position of the phonon crystal resonant cavity and the electromechanical Helmholtz resonator is fixed on the base through the support column; and a phonon crystal resonant cavity body is fixed on the base through bonding. After incident sound waves sequentially go through the gather amplification effects of the phonon crystal resonant cavity and the Helmholtz resonant cavity, the composite piezoelectric transducer is driven to vibrate, so the composite piezoelectric transducer is deformed to transmit electric signals for realizing sound-mechanism-electricity conversion; and the sound energy collector can be applied to sound energy collectors with the characteristics of multi-directions and lower energy density under complex environment, thereby providing electricity for various wireless sensors and micro electro mechanical systems.

Description

technical field [0001] The invention relates to a sub-acoustic energy collector using a phonon crystal and an electromechanical Helmholtz resonator, belonging to the technical field of new energy collection. Background technique [0002] In the past ten years, the collection of peripheral environmental energy to power unmanned autonomous systems has been extensively studied; the collected energy sources include solar energy, vibration energy, electromagnetic field, fluid energy, and thermal energy. Acoustic energy is another potentially available clean energy. How to effectively collect the ubiquitous acoustic energy in these environments and convert it into electrical energy has received extensive attention and research. Some acoustic energy acquisition systems have been proposed, which can be divided into three types from the perspective of converging acoustic energy: direct acoustic energy acquisition, acoustic energy acquisition using Helmholtz resonators, and acoustic e...

AI Technical Summary

Problems solved by technology

Acoustic energy collection technology using phononic crystal resonators is not efficient because of its low sound amplification capability

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