MULTIPOLAR ENCODER FOR POSITION SENSORS, AND DETECTION DEVICE COMPRISING SUCH AN ENCODER ASSOCIATED WITH AT LEAST ONE POSITION SENSOR

摘要

Encoder for a position sensor, of the type comprising a multipole magnetic ring (2) provided, on its circumference, with poles with polarities of opposite signs, the encoder comprising at least one marking zone (Pi) having an angular width (Li) greater than the angular width of each of the alternating poles situated outside this zone on the circumference of the ring, characterized in that the said marking zone (Pi) comprises two contiguous singular poles (Ni, Si) having polarities of opposite signs arranged in the continuity of alternating poles of the ring (2) and whose angular width is greater than that of the poles located outside the marking zone, the magnetization within the singular poles evolving gradually in a continuous manner between the two ends of the marking area.