Mathematical modeling of the registration process of ultrasonic waves in steel metal rolling by electromagnetic-type transducer. Part 1
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Abstract
The principle and method for calculating of the electromagnetic type ultrasonic transducers (EMAT) in reception mode of elastic waves for nondestructive testing of steel metal rolling surfaces is considered. Analytic expressions for the electromagnetic registration mode of ultrasonic waves in ferromagnetic metals was determine, using the theorem of the induced magnetic flux. The influence of the size of the electric circuit of alternating magnetic field receiver on the efficiency of the reception of elastic waves by electromagnetic way is evaluated. The dependence of the frequency response of receiver coil from the thickness of coils stacking is analyzed. All the decisions will eliminate the effect of EMAT on the final result formation of defect detection on the metal rolling surface, i.e., eliminate the systematic errors that are made gauge. Reference 32, figures
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