Newly re-designed magnetic head for wire rope NDT

• Autorzy: Miljavec D. , Knez S.
• Języki publikacji: EN

Abstrakty

EN

The aim of the present paper is to analyse a newly re-designed magnetic head. Basic use of this head is in non-destructive testing (NDT) of wire ropes. The magnetic head system is composed of two main areas and three main parts. These areas are: magnetic flux leakage area in central region, and eddy current magnetic field area in outer side region of magnetic head. The analyses were carried out by analytic approach and by the finite element method. The value of induced voltage in flux leakage pick-up coils was calculated by axisymmetric 2D magnetostatic finite element analysis made by ferromagnetic rod to simulate the wire rope. Meanwhile, voltage induced by changes in eddy current magnetic field was calculated by a 2D transient linear motion finite element analysis. All numerically calculated results were compared with the measured ones on a geometrically similar ferromagnetic rod. Also, we have presented the measured results carried out by newly re-designed magnetic head on real steel wire rope with anomalies.

Słowa kluczowe

EN

finite element analysis; finite element method; ferromagnetic material; eddy current; non-destructive test; magnetic leakage; magnetic flux; magnetostatics; magnetic head

PL

analiza elementu skończonego; metoda elementów skończonych; materiał ferromagnetyczny; prąd wirowy; próba nieniszcząca; rozproszenie magnetyczne; strumień magnetyczny; magnetostatyka; głowica magnetyczna

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Journal of Technical Physics
• Rocznik: 2002
• Tom: Vol. 43, no 4
• Strony: 433--441
• Opis fizyczny: Bibliogr. 2 poz., rys., wykr.

Twórcy

autor

Miljavec D.

• Faculty of Electrical Engineering, University of Ljubljana, Trżaśka 25, SI-1000 Ljubljana, Slovenia

autor

Knez S.

• Faculty of Electrical Engineering, University of Ljubljana, Trżaśka 25, SI-1000 Ljubljana, Slovenia

Bibliografia

• 1. Maxwell 2D, User manual, A 2D transient linear motion problem, Ansoft, December 2000.
• 2. D. Maga, R. Hartanski, Numerical methods in electromechanics [in Slovenian], Trencianska Universita v Trencine, 2001, ISBN 80-88914-29-9.