The multipolar encoder in order to position sensors, and detection device comprising such a coder associated with at least one position sensor

摘要

Encoder for a position sensor, of the type comprising a multipolar magnetic ring (2) provided on its circumference of the poles with polarities of opposite signs, the encoder includes at least one marking area (pi) with an angular width (li) greater than the angular width of each of the alternating poles located outside this zone on the circumference of the ring, characterized in that the marking area (pi) comprises two individual poles (ni, si) together with the polarities of opposite signs disposed in the continuity of the alternation of poles of the ring (2), and the angular width is greater than that of the poles located out of the marking area, the magnetization within the individual poles varies gradually from a continuous manner between the two ends of the marking area.