A device for determining motion parameters includes a magnetic multipole that generates an alternating magnetic field, at least one magnetic sensor for measuring the magnetic field of the magnetic multipole, and an evaluation and control unit for evaluating the signals from the magnetic sensor. The magnetic sensor includes a magnetizable core, a drive coil, and a measuring coil. The evaluation and control unit charges the drive coil with a periodic drive signal so as to bring about a periodic magnetic reversal of the core and detects the points in time at which the magnetic reversals occur in the core. Based on the points in time at which the magnetic reversals occur, the evaluation and control unit determines a current value of the effective magnetic field of the magnetic multipole within a defined measuring range representing a range around a zero crossing of the magnetic field of the magnetic multipole.