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Broadband Acoustic Beam Steering System Based on Huygens Acoustic Metamaterials

A technology of acoustic metamaterials and substrate materials, applied in the use of sound waves/ultrasonic waves/infrasonic waves for material analysis, analytical materials, scientific instruments, etc.

Active Publication Date: 2021-04-27
BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, once the traditional metamaterial structural unit is determined, the corresponding phase mutation distribution is fixed, that is, one design can only be used to achieve the refraction at a specified angle. Once the refraction angle needs to be changed, the metamaterial structural unit needs to be redesigned.

Method used

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  • Broadband Acoustic Beam Steering System Based on Huygens Acoustic Metamaterials
  • Broadband Acoustic Beam Steering System Based on Huygens Acoustic Metamaterials
  • Broadband Acoustic Beam Steering System Based on Huygens Acoustic Metamaterials

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Embodiment Construction

[0031] The comprehensive environmental test system for the Mars rover model product of the present invention will be described in detail below in conjunction with the accompanying drawings. The specific implementation is only for the purpose of illustration and is not intended to limit the protection scope of the present invention.

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] see figure 1 , figure 1 It shows the structural unit of the acoustic metamaterial of the present invention, which is periodically arranged on the base material. These include a dielectric substrate 100, a split ring (210, 310, 410) and a center post (220, 320, 420). The complementary structure of the open ring of the first type of original cell is embedded in the substrate, and the combined structure of the open ring and central column of the second and third types of original cell is surface-att...

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Abstract

The invention discloses a broadband acoustic beam regulating unit structure based on Huygens acoustic metamaterial, which comprises a base material and a structural unit array located on the base material. By introducing a compensation phase factor and adjusting the working frequency of the excitation signal, the present invention can move the focal point near the center position, utilize the unique advantages of acoustic metamaterial sub-wavelength imaging, and abandon the complexity of arranging a large number of sensors in the traditional phased array The scheme provides a new way for non-destructive testing of structural health monitoring.

Description

technical field [0001] The invention belongs to the technical field of acoustic wave control. Specifically, the invention relates to an acoustic metamaterial structural unit and its sound beam regulation. The design can achieve the dynamic scanning control of the sound wave propagation characteristics in the structure, so as to facilitate the detection of structural damage in structural health monitoring. Background technique [0002] Structural damage of spacecraft is one of the main causes of spacecraft crashes. Common damage forms on spacecraft mainly include fracture, bending, deformation, corrosion, wear of metal structures, matrix cracking and interlayer delamination of composite material structures. Vibration cracking, shedding and coating failure or cracking of thermal protection materials, bonding of joint structures between different materials, failure of mechanical connections, etc. If the structural faults of spacecraft can be effectively diagnosed, the occurren...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/22G01N29/26
Inventor 张鹏嵩曹海林杨林华武小栋张磊张景川韩潇赵越阳
Owner BEIJING INST OF SPACECRAFT ENVIRONMENT ENG