Rotational speed sensor for determining the 'slow (zero speed) and fast' rotation speeds as well as for the simultaneous determination of the direction of rotation

摘要

Inductive sensor system (1) for measuring the rotational speed of a lower and a higher speed range, comprising a sensor unit (3), which has a transmitter coil (7) transmitter side and has a receiving end, and a pulse generator (2), which in the region of the sensor unit (3) is arranged, wherein the transmitter coil (7) with an oscillator (10) is connected and the receiving end, two receiving coils (8, 9), characterized in that four signal conditioning (4a, 4b, 4a, 4b) are provided, wherein the respective signal of the receiving coils (8, 9) in each case two signal conditioning (4a, 4b) is supplied, each of which the respective signal via a first signal path for lower rotational speeds (5a), and by means of a second signal path for higher rotational speeds (5b) to a logic component (6), and, by means of the two receiving coils (8, 9) on the one hand, a redundant speed signal is generated and, on the other hand, the direction of rotation of the pulse generator (2) is determined.