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Sound wave regulation and control device for eliminating barrier scattering in waveguide and design method thereof

A control device and design method technology, applied in the direction of ultrasonic/sonic/infrasonic wave transmission systems, sound-generating devices, instruments, etc., can solve the problems of no reflection, scattering, and low transmission efficiency at the conduction output end, so as to eliminate scattering and reduce signal loss Effect

Inactive Publication Date: 2020-07-03
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present invention provides an acoustic control device that eliminates the scattering of obstacles in the waveguide. low problem

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  • Sound wave regulation and control device for eliminating barrier scattering in waveguide and design method thereof
  • Sound wave regulation and control device for eliminating barrier scattering in waveguide and design method thereof
  • Sound wave regulation and control device for eliminating barrier scattering in waveguide and design method thereof

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Embodiment 1

[0037] figure 1 It shows the structural diagram of the acoustic wave control device for eliminating the scattering of obstacles in the waveguide provided by the embodiment of the present invention, figure 2 It shows a schematic cross-sectional view along the xz coordinate axis of the acoustic wave control device for eliminating the scattering of obstacles in the waveguide provided by the embodiment of the present invention, which is combined below figure 1 and figure 2 The scheme of this application will be specifically described. The embodiment of the present invention provides an acoustic control device for eliminating the scattering of obstacles in the waveguide, which is applied to the acoustic communication in the fluid. The acoustic wave control device includes: a cylindrical hollow waveguide 1 with a uniform cross section; bonded to the inner wall of the cylindrical hollow waveguide 1 Graded-index material 2 on the surface; three obstacles 3 arranged at equal interv...

Embodiment 2

[0062] The embodiment of the present invention also provides a design method of an acoustic wave control device that eliminates the scattering of obstacles in the waveguide, including the following steps:

[0063] Step 1: Take a cylindrical hollow waveguide 1 with a uniform cross section. The side surface of the cylindrical hollow waveguide 1 is a standard circular ring. The length L in the x-axis direction=300cm;

[0064] Step 2: Bond a graded-index material 2 with a certain thickness d on the inner wall of the cylindrical hollow waveguide 1. The value of the thickness d of the graded-index material 2 must satisfy the following conditions:

[0065] d<λ, d<2 / 3b, where λ is the wavelength of the sound wave in the underwater sound field;

[0066] Step 3: immerse the body of the cylindrical hollow waveguide 1 underwater, so that the cavity of the cylindrical hollow waveguide 1 is completely filled with water;

[0067] Step 4: Take three cones with a width w and a height h of 36...

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Abstract

The invention is applicable to the field of acoustic waveguide transmission, and provides a sound wave regulation and control device for eliminating barrier scattering in a waveguide, which is appliedto acoustic communication in a fluid and comprises a cylindrical hollow waveguide with a uniform cross section; the gradient refractive index material is adhered to the inner wall of the cylindricalhollow waveguide; and the three obstacles are arranged in the cylindrical hollow waveguide at equal intervals. The invention further provides a design method of the sound wave regulation and control device for eliminating barrier scattering in the waveguide. According to the sound wave regulation and control device for eliminating scattering of the obstacles in the waveguide, scattering of the obstacles in the waveguide can be remarkably eliminated, even scattering does not exist, and signal loss caused by the obstacles is greatly reduced.

Description

technical field [0001] The invention belongs to the field of acoustic waveguide transmission, and in particular relates to an acoustic wave control device and a design method thereof for eliminating the scattering of obstacles in the waveguide. Background technique [0002] In daily life, common pipes, wires and wells are typical three-dimensional acoustic waveguides. In the waveguide cavity, when the plane acoustic wave encounters a solid obstacle, severe backscattering always occurs, which seriously hinders the transmission of the acoustic signal. [0003] In previous theoretical research and practice, there has been no effective way to reduce the problem of very low transmission efficiency at the transmission output end due to the reflection and scattering of obstacles during waveguide transmission. Contents of the invention [0004] The embodiment of the present invention provides an acoustic control device that eliminates the scattering of obstacles in the waveguide....

Claims

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Application Information

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IPC IPC(8): H04B11/00H04B13/02G10K11/18G10K11/36
CPCG10K11/18G10K11/36H04B11/00H04B13/02
Inventor 陈焕阳刘益能胡传捷曾雅丽
Owner XIAMEN UNIV
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