Device for detecting the movement of a part.

摘要

Speed detection of a moving part provided with a magnetic pulse-generator applied e.g. in the seal of a rolling bearing is known. The claimed system introduces, however, a simple manner for detecting a movement independent of the speed of the rotating part, i.e. the pulse-ring (1). Thereto a sensor (4) is applied which comprises coils (5, 6) on the body (7) made of a relatively soft magnetic material, having poles with a narrow air-slit (8) positioned adjacent said pulse-ring (1). The coils (5, 6) of a Wheatstone circuit are connected to a high frequency signal generator.