A true triaxial positioning method considering refraction path and weight estimation

By constructing the refraction path control equation and iteratively solving the coordinates of the acoustic emission source using weighted correction terms, the positioning deviation problem caused by sound waves on different refraction surfaces in the true triaxial test was solved, improving the positioning accuracy and robustness, and achieving stable acoustic emission source positioning.

CN118011322BActive Publication Date: 2026-07-03CHONGQING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING UNIV
Filing Date
2024-02-05
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing acoustic emission source localization methods have failed to effectively address the localization deviation caused by acoustic waves on different refractive surfaces in true triaxial tests, and have not considered the impact of time difference constants and wave velocity measurement errors on localization accuracy, resulting in insufficient localization accuracy.

Method used

A true triaxial positioning method considering refraction path and weight estimation is adopted. By constructing the refraction path control equation, calculating the refraction path residual, and using Snell's law and orthogonal constraints to solve for the refraction point, the coordinates of the acoustic emission source are solved iteratively by combining the weighted correction term to achieve accurate positioning.

Benefits of technology

It improves the positioning accuracy and robustness of acoustic emission sources, reduces the influence of time difference inconstants and wave velocity measurement errors, and achieves stable triaxial experimental acoustic emission source positioning.

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Abstract

This invention provides a true triaxial positioning method considering refraction path and weight estimation. First, a refraction path control equation is constructed based on sensor coordinates and arrival time. Second, considering the influence of time error, the residual of the refraction path control equation is calculated, and the equation weights are estimated. Then, the refraction points in different directions are solved using Snell's law and orthogonal constraints. Finally, the coordinates of the acoustic emission source are iteratively solved using weighted correction terms to achieve acoustic emission source positioning. This application can solve the positioning deviation problem caused by sound wave refraction in true triaxial experiments, and the method has stable and accurate positioning performance.
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