Method and Device for Sorting Thin-Walled Sheets of the Same Steel Grade

In this work, electromagnetic transducers for express analysis of the structure of metal sheets are considered. Several methods for increasing the sensitivity of the converter are proposed. An electromagnetic multi-resonance method for sorting thin-walled sheets of the similar steel grade manufactured at different factories is considered. Several methods for increasing the sensitivity of the transducer are proposed. The design of the primary converter is proposed to increase the sensitivity of the method. It can significantly reduce the influence of the gap between the converter and the test product, as well as reduce the influence of ambient temperature on the accuracy of control. To increase the sensitivity when monitoring differences in electromagnetic properties between standard and test products, a oscillator circuit of the primary converter is proposed.