Влияние частоты тока питания на результаты ВТ контроля

Nondestructive electromagnetic evaluation and testing are widely used for evaluating and testing of electro conductive and magneto conductive stuffs and details. Usually, this nondestructive technique, electromagnetic, works in harmonic continuous mode, and its analysis is based on a frequency analysis method. Lately, it is more often used pulsed electromagnetic mode of nondestructive evaluation and testing due to its multi-parameters features. This mode can be also analyzed with the help of frequency analysis method due to Fourier and Laplace methods. Thus, this article is dedicated to Eddy-Current sensor electrical parameters (resistance, inductance and capacitance) calculation as a function of AC sourcing current frequency with aallowance for influence of Testing Samples parameters. Analytical model was developed with the help of similitude method, which let to take into account “skin-effect” in a wire with round cross-section of sensors coil, curvature of its round wire and proximity effect of coil of the sensor and Testing Samples parameters