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The paper presents the analysis of nondestructive testing equipment under investigation. There are two main parts of the research as well as this paper. The first part shows the present state of the developed nondestructive tester based on the Magnetic Flux Leakage method, the other part reviews the simulation and the results, which have been made with the principle of the Finite Element Method. The aim now is to define the order of magnitude of the magnetic flux density in the positions of the sensor.

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The paper reports about the building up a computer controlled measurement system based on National Instruments Data Acquisition card and National Instruments LabVIEW software package. The aim of this research is to detect manufactured surface cracks on steels by applying a magnetic flux leakage testing method. First of all, a finite element method based on the procedure to analyze the behavior has been implemented of the measurement system under construction. One important question is the position of the sensors or of the detecting coils. The finite element procedure contains a two dimensional arrangement. First, eddy currents have been neglected, but the nonlinear characteristic of the specimen has been taken into account by a single valued function. In this paper, the developed measurement system, which is partially ready to work, and the nonlinear finite element procedures are presented as well.

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, “ Simulation of a developed magnetic flux leakage method ,” Pollack Periodica , vol. 4 , no. 2 , pp. 45 – 56 , 2009 . 10.1556/Pollack.4.2009.2.5 [10] N. A. Spaldin , Magnetic Materials: Fundamentals and Device Applications . Cambridge University Press

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