Aspects of the design of the electromagnetic transducer for diagnosing machinery elements

In the article the authors consider the electromagnetic transducer for multiparameter non-destructive testing of metal cylinders. The publications review shows that the task of monitoring the stress-strain state of cylindrical metal elements of machinery is relevant. The detection of such a state is carried out by measuring the electrophysical parameters of these cylinders. It is shown that these parameters are arguments of the functions of the magnetic flux density vector components, which are considered in a 2D cylindrical coordinate system. A distribution of the tangential and radial components of the electromagnetic field in the space surrounding the tested object is obtained. The zones of the non-informative output signal of the measuring coils are determined for the case of their placement on a circle of a fixed radius. Such zones are also defined when normalized signals are used.