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A cylinder acoustic emission positioning method, system, terminal and readable storage medium based on analytical solution of grouped sensors

An acoustic emission and sensor technology, which is used in material analysis, positioning, and material analysis using acoustic emission technology. It can solve the problems of inability to obtain analytical solutions quickly, and high requirements for sensor placement, achieving reliable positioning results, good stability, and high reliability. Calculate easy effects

Active Publication Date: 2022-03-22
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, how to solve the above-mentioned cylindrical acoustic emission source location needs to select the shortest path from multiple paths, and cannot quickly obtain an analytical solution or use an iterative method to solve it. A single location to the data may obtain local optimal solutions and other issues, which are urgently needed to be studied by the present invention

Method used

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  • A cylinder acoustic emission positioning method, system, terminal and readable storage medium based on analytical solution of grouped sensors
  • A cylinder acoustic emission positioning method, system, terminal and readable storage medium based on analytical solution of grouped sensors
  • A cylinder acoustic emission positioning method, system, terminal and readable storage medium based on analytical solution of grouped sensors

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Embodiment 1

[0062] like figure 1 As shown, the cylinder acoustic emission positioning method based on the analytical solution of grouped sensors provided in this embodiment includes the following steps:

[0063] Step 1: Based on the shortest distance on the cylinder, P wave propagation velocity and travel time, construct the P wave travel time relationship equation between the sensor and the acoustic emission event, and derive the analytical solution of the acoustic emission positioning on the half cylinder; where, as figure 2 As shown, the cylinder is placed horizontally, and the cylinder is divided into upper and lower parts according to the horizontal plane of the diameter of the cylinder, and the division plane is perpendicular to the circular section of the cylinder, and then the y-axis is along the diameter of the cylinder, and the x-axis is along the cylinder height direction. In this embodiment, the following formula (1) is used to indicate that the shortest arc length rad of tw...

Embodiment 2

[0096] On the basis of Embodiment 1, the present invention provides a positioning system based on the above method, which includes: a relationship equation construction unit, a grouping unit, an analytical solution solving unit and a positioning unit.

[0097] Among them, the relationship equation construction unit is used to construct the P wave travel time relationship equation between the sensor and the acoustic emission event based on the shortest distance on the cylinder, the P wave propagation velocity and the travel time, and derive the analytical solution of the acoustic emission positioning on the half cylinder;

[0098] The grouping unit is used to divide every 4 sensors on the same side half cylinder into a group;

[0099] The analytical solution solving unit is used to solve the acoustic emission analytical solution positioning point corresponding to each group of sensors; the positioning unit is used to obtain the data field potential value of the acoustic emission...

Embodiment 3

[0102] This embodiment provides a terminal, which includes: a processor and a memory, the memory stores a computer program, and the computer program is invoked by the processor to implement:

[0103] Step 1: Based on the shortest distance on the cylinder, P-wave propagation velocity and travel time, the P-wave travel-time relationship equation between the sensor and the AE event is constructed, and the analytical solution for AE positioning on the semi-cylinder is derived.

[0104] Step 2: Divide every 4 sensors on the half cylinder on the same side into a group, and obtain the acoustic emission positioning point corresponding to each group of sensors through analytical solution.

[0105] Step 3: Obtain the data field potential value of the acoustic emission positioning point, and determine the positioning result of the acoustic emission event according to the data field potential value.

[0106] For the specific implementation process of each step, please refer to the descrip...

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Abstract

The invention discloses a cylindrical acoustic emission positioning method, system, terminal and readable storage medium based on the analytical solution of grouped sensors. The positioning method includes: constructing a P-wave travel time relational equation, and deriving the acoustic emission positioning analysis on the half cylinder Solution; Divide every 4 sensors on the half cylinder on the same side into a group, and obtain the corresponding acoustic emission positioning point of each group of sensors by analytical solution; calculate the data field potential value of each acoustic emission positioning point, and according to the data field potential value Determining localization results of acoustic emission events. The present invention uses the shortest distance between two points on the cylinder to construct the P-wave travel time relationship equation, and solves a plurality of acoustic emission positioning points, and then determines the acoustic emission position according to the potential value of the positioning points, avoiding the need for multiple positioning of the acoustic emission source of the cylinder The problem is that the shortest path is selected among the two paths, the analytical solution cannot be obtained quickly or iterative method is used to solve the problem, the efficient positioning method has high requirements on the sensor layout position, and the local optimal solution may be obtained by a single positioning based on the P-wave first-arrival data.

Description

technical field [0001] The invention belongs to the field of acoustic emission monitoring, and in particular relates to a cylinder acoustic emission positioning method, system, terminal and readable storage medium based on the analytical solution of grouped sensors. Background technique [0002] Cylindrical structures are widely used in pressure vessels, pipelines and other projects, and their health monitoring is crucial to production safety. In recent years, acoustic emission monitoring technology has been successfully applied in the damage monitoring of cylindrical structures, which can invert information such as the location of the rupture source, and then make timely response measures to ensure the safety of the structure. Acoustic emission positioning often uses the travel time method. This type of method uses the difference between the observed time of P waves and the theoretical arrival time to establish an objective function. The four commonly used objective functio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/14G01N29/44G01S5/22
CPCG01N29/14G01N29/44G01S5/22G01N2291/023
Inventor 尚雪义刘彩云苗润雪
Owner CHONGQING UNIV
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