Suppression of low-frequency interferences in the induction sensor of magnetic field

This work proposes the improvement of metrological performance data from the induction magnetic field transducer by suppressing the considerable interferences in the low part of its frequency range where the transfer function is rising. Suppression of such interferences is achieved by incorporating n-unit RC-filters into the input circuits of the transducer with a negative magnetic flux feedback loop. The equations for calculating transfer function for the highly sensitive wide-band induction transducers with two and three-unit RC-filters are described. The data from simulation and experimental results using these devices with such RC-filters are presented. The uncertainties affecting both the experimental data and the calculated orders of suppression have been estimated.