Yu. Ya Reutov

A SURFACE EDDY CURRENT TRANSDUCER FOR METAL LOSS DETECTION

The paper reports the results of an experimental study of the work of a surface eddy current transducer in terms of detecting and testing metal loss under one-sided access conditions. The transducer consists of an exciting coil and a microchip Hall-effect transducer placed in it. The phase shift of the voltage from the Hall probe output relative to the current in the exciting coil, measured by a digital phase meter, is used as an informative parameter. The experiments were carried out on a package of duralumin plates. It is shown that, when the thickness of the duralumin test object is 12.5 mm, a fairly linear transformation of metal loss from 0 to 50 % at a frequency of 640 Hz is possible. The results can be useful in the development of devices for detecting metal corrosion losses in non-ferromagnetic objects with a thickness of tens of millimeters under one-sided access conditions.

Acknowledgment: The work was carried out within the framework of the state assignment from the Russian Min-istry of Education and Science, theme: Diagnostics, No. 122021000030-1.

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