Array resonator based on phononic crystals

A technology of phononic crystals and resonators, which is applied in the field of sound devices, can solve problems such as the inability to collect sound in the narrow range and the inability of sound power generation technology to improve the efficiency of converting sound energy into electric energy, so as to achieve the effect of improving efficiency

Inactive Publication Date: 2021-02-26
HARBIN ENG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing sound power generation technology cannot improve the power generation efficiency of sound energy into electrical energy.
And a single phononic crystal has a narrow passband and cannot collect sounds of different frequencies

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Array resonator based on phononic crystals
  • Array resonator based on phononic crystals
  • Array resonator based on phononic crystals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0016] combine Figure 1-4 , a phononic crystal-based array resonator includes: a number of Helmholtz resonators, a phononic crystal base plate, a phononic crystal, and a piezoelectric film. Several Helmholtz resonators are arranged mutually by Helmholtz resonators of different sizes; the phononic crystal base plate is placed at the bottom of several Helmholtz resonators; the phononic crystals are arranged in the cavity of the several Helmholtz resonators Inside the body; the piezoelectric film is also placed at the bottom of several Helmholtz resonators, and an air layer is separated from the phononic crystal base plate, thereby improving the vibration efficiency of the piezoelectric film.

[0017] Several Helmholtz resonators are designed with different sizes to facilitate the collection of sounds of different frequencies, improve the efficiency of sound-to-ele...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention aims to provide an array resonator based on phononic crystals. The array resonator comprises a Helmholtz resonator, phononic crystals are embedded on the inner wall of the Helmholtz resonator, a phononic crystal bottom plate and a piezoelectric film are arranged at the bottom of the Helmholtz resonator, and an air layer is arranged between the phononic crystal bottom plate and the piezoelectric film. Compared with a traditional sound vibration energy collecting device, the device has the advantages that a plurality of phononic crystals are embedded in the inner wall of the Helmholtz resonator, and the phononic crystal bottom plate and the piezoelectric film are additionally arranged at the bottom of the device. And a single piezoelectric type or electromagnetic type sound energy power generation device is not used. Therefore, the device can collect sounds of multiple frequency bands, and the efficiency of converting sound energy into electric energy is improved.

Description

technical field [0001] The invention relates to a sound device, in particular to a sound generating device. Background technique [0002] A phononic crystal is a material or structure with a periodic distribution of elastic constants and densities. When the elastic wave propagates in the phononic crystal, the function of the internal structure is put away, and the elastic wave in a certain frequency range is prohibited from propagating (phonon forbidden band); while in other frequency ranges, it can propagate without loss (pass band), elastic The frequency range in which waves cannot propagate is known as the bandgap of the phononic crystal. Therefore, phononic crystals can be used to control the propagation of elastic waves, and have broad application prospects in the fields of new acoustic devices and vibration and noise reduction. [0003] The existing sound power generation technology cannot improve the power generation efficiency of sound energy into electric energy. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18
CPCH02N2/186
Inventor 马旋武萧衣范睿韬符文轩葛畅陈辰霖陈珂杜睿扬卢熙群
Owner HARBIN ENG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap