Abstract
Acoustic emission(AE)localization algorithms based on homogeneous media or single-velocity are less accurate when applied to the triaxial localization experiments.To the end,a robust triaxial localization method of AE source using refraction path is proposed.Firstly,the control equation of the refraction path is established according to the sensor coordinates and arrival times.Secondly,considering the influence of time-difference-of-arrival(TDOA)errors,the residual of the governing equation is calculated to esti-mate the equation weight.Thirdly,the refraction points in different directions are solved using Snell's law and orthogonal constraints.Finally,the source coordinates are iteratively solved by weighted correc-tion terms.The feasibility and accuracy of the proposed method are verified by pencil-lead breaking experiments.The simulation results show that the new method is almost unaffected by the refraction ratio,and always holds more stable and accurate positioning performance than the traditional method under different ratios and scales of TDOA outliers.
基金项目
国家自然科学基金(52304123)
国家自然科学基金(52104077)
Postdoctoral Fellowship Program of CPSF(GZB20230914)
中国博士后科学基金(2023M730412)
National Key Research and Development Program for Young Scientists(2021YFC2900400)
维普
万方数据