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CN-121978629-A - Single-sensor vibration identification reverse design coding super-surface of zigzag single cell-fan-shaped sheet coupling

CN121978629ACN 121978629 ACN121978629 ACN 121978629ACN-121978629-A

Abstract

The application relates to a zigzag single-cell-fan-shaped sheet coupled single-sensor vibration identification reverse design coding super-surface, belonging to the technical field of vibration positioning identification. The vibration signal receiving device comprises semicircular separation plates, vibration signal receivers, fan-shaped thin plates and super-surface unit cells, wherein two separation plates are arranged in a crisscross manner, the vibration signal receivers are arranged at the bottoms of the cross points of the two separation plates, at least three fan-shaped thin plates are arranged in each receiving space, the tail end parts of the fan-shaped thin plates are connected with the vibration signal receivers, mounting holes are formed in each fan-shaped thin plate, and the super-surface unit cells are arranged in the mounting holes at intervals. According to the application, the super surface unit cells are arranged on the plurality of fan-shaped thin plates to be arranged in a three-dimensional shape, so that elastic waves conducted from different directions can be effectively received, and the device can meet the requirement of a complex three-dimensional wave field.

Inventors

  • YAO LINGYUN
  • MENG RUIQI

Assignees

  • 西南大学

Dates

Publication Date
20260505
Application Date
20260312

Claims (7)

  1. 1. The single-sensor vibration identification reverse design coding super-surface of the zigzag unit cell-fan-shaped sheet coupling is characterized by comprising a semicircular partition plate (1), a vibration signal receiver (2), a fan-shaped sheet (3) and a super-surface unit cell (4); the two separation plates (1) are arranged in a crisscross manner so as to form four receiving spaces, and vibration signal receivers (2) are arranged at bottoms of crossing points of the two separation plates (1); At least three fan-shaped thin plates (3) are arranged in each receiving space, and the fan-shaped thin plates (3) are arranged in an annular array by taking the vibration signal receiver (2) as a circle center, wherein the tail parts of the fan-shaped thin plates (3) are respectively connected with the vibration signal receiver (2); each fan-shaped thin plate (3) is provided with a mounting hole, and super surface unit cells (4) are arranged in the mounting holes at intervals.
  2. 2. The zigzag single-sensor vibration-recognition reverse-engineered coded super-surface of claim 1, wherein: Wherein the tooth width is c 1 , the inner groove width is c 2 , the outer groove width is c 3 , the tooth-shaped section length is L, the tooth height of the tooth positioned in the middle is h 1 , the tooth heights of the teeth positioned at two sides are the same, and the tooth heights of the teeth positioned at two sides are h 2 ;1.4mm<（c 1 ,c 3 ) <1.6mm; 6mm<(h 1 ,h 2 )<7.6mm; mm<c 2 < mm。
  3. 3. the zigzag single-sensor vibration-recognition reverse-engineered coded super-surface of claim 1, wherein: three fan-shaped thin plates (3) are arranged in each receiving space; the three fan-shaped thin plates (3) respectively form included angles of 0 degree, 30 degrees and 60 degrees with the bottom surface of the partition plate (1).
  4. 4. A saw tooth unit cell-fan sheet coupled single sensor vibration identification reverse design coded super-surface as claimed in claim 3, wherein: 10 super surface unit cells (4) are arranged in the mounting holes of the fan-shaped thin plates (3) with an included angle of 0 degrees; 8 super surface unit cells (4) are arranged in the mounting holes of the fan-shaped thin plates (3) with an included angle of 30 degrees; 6 super surface unit cells (4) are arranged in the mounting holes of the fan-shaped thin plates (3) with an included angle of 60 degrees.
  5. 5. The zigzag single-sensor vibration-recognition reverse-engineered coded super-surface of claim 1, wherein: the phase shift and the transmissivity of the vibration signal regulated by the super surface unit cell (4) on the fan-shaped thin plate (3) with the same size are different.
  6. 6. The zigzag single-sensor vibration-recognition reverse-engineered coded super-surface of claim 5, wherein: The super surface unit cells (4) on the same size fan-shaped sheet (3) are not identical or are completely different.
  7. 7. The zigzag single-sensor vibration-recognition reverse-engineered coded super-surface of claim 6, wherein: H 1 and h 2 of any of the super surface unit cells (4) were randomly valued at 1.6mm-7.6 mm.

Description

Single-sensor vibration identification reverse design coding super-surface of zigzag single cell-fan-shaped sheet coupling Technical Field The invention relates to the technical field of vibration positioning identification, in particular to a single-sensor vibration identification reverse design coding super-surface coupled by a zigzag single-cell-fan-shaped thin plate. Background Conventional vibration positioning identification methods mainly comprise coherent function analysis, blind source separation, array signal processing technology and other technologies, however, the conventional positioning methods all require a large number of sensor arrangements and a large number of complex acquisition systems and control circuits. This not only makes the positioning recognition of the vibration signal very costly, but also limits the accuracy of the positioning recognition in the subsequent positioning recognition because of the complex layout. The metamaterial is an artificial composite material with special physical properties (such as negative equivalent mass and negative equivalent modulus) which are not possessed by the natural material, and brings a new idea of subversion for positioning and identifying elastic waves (vibration), and specifically, a microstructure unit of the metamaterial is designed into a sensing unit or a calculating unit, when the elastic waves pass through or interact with the metamaterial, the wave front shape, the propagation direction or the frequency spectrum characteristic of the elastic waves can be directly encoded and preprocessed by the physical structure of the metamaterial, and the position and the characteristic of a wave source can be directly mapped by analyzing a simple response signal at the output end of the metamaterial, so that the vibration positioning and identifying are realized, and the structural health monitoring and intelligent perception of lighter weight, integration, real-time and low power consumption are realized. The existing sensing units which are manufactured by adopting metamaterial and used for positioning and identification are integrally in a serpentine flat bar-shaped structure, and the identification and positioning of elastic waves are limited to the identification and positioning in a two-dimensional plane, so that the requirements of complex three-dimensional wave fields cannot be met. Disclosure of Invention In order to solve or partially solve the problems in the related art, the invention provides a zigzag single cell-fan-shaped sheet coupled single-sensor vibration identification reverse design coding super-surface, which aims to solve the technical problem that the existing metamaterial sensing unit cannot meet the identification positioning requirement in a complex three-dimensional wave field. A single-sensor vibration identification reverse design coding super-surface of a zigzag unit cell-fan-shaped sheet coupling comprises a semicircular partition plate, a vibration signal receiver, a fan-shaped sheet and a super-surface unit cell; the two partition boards are arranged in a crisscross manner so as to form four receiving spaces, and vibration signal receivers are arranged at the bottoms of the intersections of the two partition boards; at least three fan-shaped thin plates are arranged in each receiving space, and the fan-shaped thin plates are arranged in an annular array by taking the vibration signal receiver as a circle center; and each fan-shaped thin plate is provided with a mounting hole, and super-surface unit cells are arranged in the mounting holes at intervals. In some schemes, wherein the tooth width is c 1, the inner groove width is c 2, the outer groove width is c 3, the tooth-shaped section length is L, the tooth height of the tooth positioned in the middle is h 1, and the tooth heights of the teeth positioned on two sides are the same and are h 2; 1.4mm<(c1,c3)<1.6mm; 1.6mm<(h1,h2)<7.6mm; mm<c2<mm。 In some aspects, three fan-shaped thin plates are arranged in each receiving space; the three fan-shaped thin plates respectively form included angles of 0 degree, 30 degrees and 60 degrees with the bottom surface of the partition plate. In some aspects, 10 super surface unit cells are arranged in the mounting holes of the fan-shaped thin plates with an included angle of 0 degrees; 8 super surface unit cells are arranged in the mounting holes of the fan-shaped thin plates with the included angle of 30 degrees; 6 super surface unit cells are arranged in the mounting holes of the fan-shaped thin plates with the included angle of 60 degrees. Within a limited size range, more cells are provided, enabling a reduced correlation between the mutual signals. In some embodiments, the phase shift and transmittance of the vibration signal modulated by the super surface unit cell 4 on the same size fan-shaped sheet 3 are different. In some embodiments, the super surface unit cells 4 on the same size fan-shaped sheet 3 are not identi