EXPANSION OF THE FUNCTIONAL CAPABILITIES OF ELECTROMAGNETIC METHODS AND DEVICES FOR CONTROLLING MECHANICAL STRESSES IN CYLINDRICAL METAL PRODUCTS

This study addresses the theoretical foundations and the implementation algorithm of a differential transformer electromagnetic overlay transducer designed for monitoring variations in the electromagnetic parameters of a ferromagnetic shaft subjected to torque. An experimental setup was created, and the transducer's characteristics for amplitude, phase, and variable-frequency control methods were obtained. The obtained dependencies show that using the differential method, magnetic permeability and magnetizing current frequency serve as informative parameters, being the most sensitive to changes in mechanical loads on the cylindrical product. It has been established that such a system has high resolution and expanded functional capabilities.