Khomyak Y. Eddy current flaw detector with compensation of the influence of ferromagnetic metalware surface conditions.

Investigation object - the process of the interaction of electromagnetic fields with a metal object, in which a signal is generated which contains information on the availability and parameters of surface defects. Objective: to increase the effectiveness of eddy current flaw in the control of the ferromagnetic metal with a rough surface and the different electromagnetic properties of the metal. Research Methods and apparatus: analytical methods for solving problems of electrodynamics of continuous media, numerical linear algebra methods of differential and integral calculus, elements of the theory of probability and mathematical statistics. Theoretical and practical results: designed and manufactured for the eddy current flaw detection of surface defects and estimation of their parameters, the results of which controls slightly dependent on the properties of the surface quality of the product. Novelty: by recording signals due to spatial distortion vector of the electromagnetic field of the eddy currents generated by a surface defect, developed a method of eddy current flaw detection of conductive ferromagnetic products that effectively control metal with considerable surface roughness. The degree of implementation: The results of the thesis introduced in Azovstal Iron & Steel Works Mariupol for surface defects detection and estimation of their parameters in the educational process of the department. Scope: results are used for instrument-making enterprises , metallurgical, machine-building industries.