Revolution counters and method for operating a revolution counter

摘要

A revolution counter comprises a magnetically anisotropic layer, on the surface of an annular first guide structure for guidance in the magnetically anisotropic layer is arranged a magnetic bubbles domains. The first guide structure is of a magnetic domain of bubbles during a predetermined first number of revolutions of a rotating magnetic field rotating an fbar. The revolution counter has a first sensor element which is formed, a presence of a magnetic bubbles domain at a first position of the first guide structure to detect.