An acoustic material with acoustic focusing that achieves self-healing properties

An acoustic material and self-repairing technology, which is applied in the direction of sound-generating devices and instruments, can solve the problems of affecting the treatment effect and focusing effect interference, and achieve the effect of weakening the effect of focusing effect

Active Publication Date: 2019-09-10
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some problems in the practical application of the acoustic focusing achieved by the existing methods. For example, during the treatment of high-intensity focused ultrasound, if there is an obstacle in the propagation path of the ultrasound, the focusing effect will be seriously disturbed and affect the treatment effect.

Method used

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  • An acoustic material with acoustic focusing that achieves self-healing properties
  • An acoustic material with acoustic focusing that achieves self-healing properties
  • An acoustic material with acoustic focusing that achieves self-healing properties

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Embodiment 1

[0015] Such as Figure 4 As shown, the acoustic material with acoustic focusing that realizes self-healing properties includes the Airy beam generating devices with left-right symmetrical distribution, and the Airy beam generating devices such as figure 2 As shown, the Airy beam generating device includes several pipeline units closely arranged along a straight line, and each pipeline unit always contains p pipelines closely arranged along a straight line, and p is a positive integer. In this embodiment, each pipeline unit Contains 4 pipelines, all of which have the same length, and are all acoustic wavelengths in the air at a certain frequency, and the frequency selected in the present invention is 4500 Hz. figure 1 For the variation curve of the Airy function Ai (10x) selected in the present invention along with x, the present invention also can select other Airy functions, and this figure shows that the half-wavelength of the Airy beam at different positions is different, ...

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Abstract

The invention discloses an acoustic material having an acoustic focusing function capable of realizing self-repair. The acoustic material comprises an Ai wave beam generating device, which is in a left-right symmetric arrangement. The Ai wave beam generating device comprises a plurality of pipeline units, which are arranged linearly in a tightly-attached manner, and each of the pipeline units comprises a plurality of pipelines, which are arranged linearly in a tightly-attached manner, and in addition, the lengths of the pipelines are the same, and the widths of the pipelines of each pipeline unit are the same, and each of the pipelines is filled with zero refractivity materials having different depths. The acoustic material having the acoustic focusing function capable of realizing the self-repair is advantageous in that by using the self-repair characteristic of the Ai wave beams and the constant phase distribution characteristic of the zero refractivity smartly, a pair of Ai wave beams are disposed on the symmetric positions, and therefore the acoustic focusing function capable of realizing self-repair can be realized, and by adopting the characteristic, the sound wave can be transmitted continuously by bypassing a plurality of barriers of the path, and the influence of the barriers on the focusing effect can be reduced greatly.

Description

technical field [0001] The invention relates to an acoustic material capable of realizing self-repairing acoustic focusing and belongs to the field of acoustic materials. Background technique [0002] Acoustic focusing has broad application prospects in the fields of non-destructive testing, medical diagnosis and treatment. Both phononic crystals and acoustic metamaterials can achieve acoustic focusing. However, there are some problems in the actual application of the acoustic focusing achieved by the existing methods. For example, during the treatment of high-intensity focused ultrasound, if there is an obstacle in the propagation path of the ultrasound, the focusing effect will be seriously disturbed and affect the treatment effect. Therefore, it is necessary to implement an acoustic focusing with self-healing properties to solve the above problems. The Airy beam is a kind of non-diffraction beam, which has the characteristics of self-bending and self-healing. Its self-he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10K11/30
Inventor 梁彬郜贺顾仲明邹欣晔程建春
Owner NANJING UNIV
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