establishment of the state of thick and dickenvariationen

摘要

A flat article (3) is disposed between two guiding devices (1,2) such that a variation in the thickness of the flat article causes a deflection of the guiding devices. At least one coil (6) is energized to generate an alternating magnetic field. An electronic evaluation unit (8) determines the influence of an electrical conductor (7) on the alternating magnetic field due to the deflection of the guiding devices.