Studying the computational resource demands of mathematical models for moving surface eddy current probes for synthesis problems
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 5, Issue 5
Abstract
<p>Distribution of eddy current density for three types of coils of excitation of moving surface eddy current probes, in particular circular, rectangular, orthogonal-rectangular shapes was calculated according to the formulas of "exact" electrodynamic mathematical models with allowance for the speed effect.</p><p>Calculation time from 8 to 20 hours was established for a circular excitation coil with dimensions of testing zone 50´50 mm at speed u<sub>x</sub>=40 m/s. The calculation time was from 8 to 9 hours for a rectangular excitation coil at a speed of movement in direction of two components u<sub>x</sub>, u<sub>y</sub>=20 m/s with the testing zone dimensions of 80´48 mm. The calculation time was more than 7 hours for an excitation coil of orthogonal rectangular shape with dimensions of the testing zone of 15´35 mm at a speed of movement in direction of components u<sub>x</sub>, u<sub>y</sub>=40 m/s; and for the testing zone dimensions of 12´24 mm for u<sub>x</sub>, u<sub>y</sub>=40 m/s it was longer than 9 hours. It was found that the computational complexity of calculation of distribution of the eddy current density with the use of "exact" mathematical models was rather large when changing even two spatial coordinates in the testing zone. That is, the direct use of "exact" mathematical models when calculating the values of distribution of the eddy currents density in the points of the controlled zone is inappropriate taking into account the considerable resource intensity of the computational process.</p><p>The necessity for using a mathematical apparatus of surrogate optimization was substantiated for designing eddy current probes with a uniform distribution of eddy current density in the testing zone.</p>This study is useful for non-destructive testing specialists in the field of mechanical engineering. The study results can be used in designing eddy current probes with improved metrological characteristics, in particular homogeneous sensitivity, localization of the probing excitation field, improved noise immunity, possibility of eliminating the edge effect manifestations in testing
Authors and Affiliations
Ruslana Trembovetska, Volodymyr Halchenko
Keywords
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- EP ID EP528177
- DOI 10.15587/1729-4061.2018.143309
- Views 67
- Downloads 0
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