Inductive sensor for measuring e.g. rotation speed of shaft, has permanent magnet for generating magnetic field, where closed magnetic path of magnetic flow line comprises air gap, in which rotating component is engaged

摘要

The sensor (1) has a phonic wheel (4) with a permanent magnet (2) for generating a magnetic field (11). A core (5) comprises a coil (6) attached to a measuring device and wound on the device for detecting magnetic flux change caused by a rotating component. A closed magnetic path of a magnetic flow line comprises an air gap (12), where the rotating component is engaged in the air gap. The gap is formed between opposite front sides of shank ends of a magnetic yoke (10).