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A Method for Acoustic Emission Source Localization Applicable to Surface of Spherical Container

A spherical container and acoustic emission source technology, which is used in material analysis and positioning using acoustic wave emission technology, and analysis of solids using acoustic/ultrasonic/infrasonic waves, which can solve the problems of high positioning cost and large amount of calculation of acoustic emission sources.

Active Publication Date: 2022-04-15
JILIN UNIV
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  • Application Information

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Problems solved by technology

This leads to high cost of acoustic emission source location on the surface of a large spherical container, and a large amount of calculation, so it is often difficult to meet the needs of the project in time

Method used

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  • A Method for Acoustic Emission Source Localization Applicable to Surface of Spherical Container
  • A Method for Acoustic Emission Source Localization Applicable to Surface of Spherical Container
  • A Method for Acoustic Emission Source Localization Applicable to Surface of Spherical Container

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Embodiment 1

[0035] figure 1 Schematically shows the structure of an L-shaped sensor array suitable for the acoustic emission source localization method on the surface of a spherical container according to an embodiment of the present invention, figure 2 shown figure 1 Acoustic emission source localization of spherical vessel surfaces in the structure of the isotropic spherical vessel surface acoustic source localization method, image 3 shown figure 1 The principle of calculating the latitude of the sound source on the surface of an isotropic spherical vessel applicable to the acoustic emission source localization method on the surface of a spherical vessel, Figure 4 shown figure 1 Acoustic Emission Source Localization on Spherical Vessel Surface Method in the Structure of Anisotropic Spherical Vessel Surface Acoustic Source Localization, Figure 5 shown figure 1 The principle of judging the real sound source position of the acoustic emission source localization method on the surfa...

Embodiment 2

[0075] Specific steps are as follows:

[0076] Step A, establish a spherical coordinate system on the surface of an anisotropic spherical container with a diameter of 60 cm, S 2 and S 5 The coordinates of are respectively (0°, 0°), (270°, 90°). Sensor spacing d is 2cm, S 1 , S 2 and S 3 together form an L-shaped sensor array, S 4 , S 5 and S 6 Together they form an L-shaped sensor array, and two sets of L-shaped sensor arrays jointly form an anisotropic spherical container surface acoustic emission source localization sensor array.

[0077] Step B, use a pencil to break off the refill at a randomly selected position to simulate the sound source.

[0078] Step C, recording and storing the acoustic wave signals received by each sensor from the sound source.

[0079] Step D, calculate the time difference Δt between the sensors based on the arrival time of the first wave collected by each sensor ij .

[0080] Step E, determine the latitude and longitude of the coordinat...

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Abstract

The invention discloses an acoustic emission source positioning method suitable for the surface of a spherical container. The method comprises the following steps: a) establishing an acoustic emission source localization sensor array; b) recording and storing the acoustic wave signals received by each sensor from the sound source; c) analyzing the acoustic wave signal diagram to obtain the required time difference; d) determining the time difference according to the time difference The position of the true and false sound source; e) determine the position of the true sound source; among them, for the spherical container with isotropic sound velocity and the spherical container with different sound speed, the acoustic emission source localization sensor array is established by different methods And determine the location of true and false sound sources. The acoustic emission source localization method applicable to the surface of the spherical container in the present invention proposes a new method for the acoustic source localization problem in the acoustic emission detection, and ensures the safety of the structure by timely detecting damage and potential threats. Chemical industry, deep sea diving and other fields have good application prospects.

Description

technical field [0001] The invention relates to the technical field of sound source localization, in particular to an acoustic emission source localization method applicable to the surface of a spherical container. Background technique [0002] As a dynamic non-destructive testing technique, acoustic emission source localization can be monitored in real time without damaging materials. Since the coordinates of the defect can be located by the sound waves generated at the initial stage of the defect formation, the location of the acoustic emission source can enable the maintenance personnel to concentrate detection in a small area and quickly eliminate hidden dangers. [0003] Spherical containers are widely used in industry to store various gases or liquids, and the internal pressure is significantly different from the external environment. Compared with pressure vessels of other shapes, the spherical structure has the most uniform force on the inner wall due to the central...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04G01N29/14G01S5/22
CPCG01N29/04G01N29/14G01S5/22G01N2291/023
Inventor 崔志文周子贤
Owner JILIN UNIV
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