Einrichtung zur berührungslosen Messung der Drehzahl eines Bauteils

摘要

The invention relates to a device for the contactless measurement of the rotational speed of a first part which rotates during operation and which is arranged inside a second part that either does not rotate or rotates with a rotational speed which is independent of the rotational speed of the first part. The inventive device comprises an arrangement which generates a magnetic field, and has a magnetic field detector, whereby the arrangement which generates the magnetic field is a magnet ring (4) that is integrated in the part (1) located inside. In addition, the magnetic field detector is a Hall-effect sensor (3) which is arranged in a housing (6) enclosing both parts. The second part (2) is comprised of a non-magnetizable material.