Abstract: The invention relates to a magnetic sensor for determining the position of a part (2) movable firstly in rotation over a limited angular stroke by virtue of a rotary movement (R), and secondly in translation along a translation axis (X) and over a limited linear stroke, this sensor including both a magnetized target (3) mounted on and fastened to the movable part (2) and taking the form of a radially-magnetized part-cylinder having an axis of symmetry coinciding with the translation axis (X) and also a system (5) for measuring the magnetic field of the magnetized target to determine the position of the target in three dimensions. According to the invention, in order to determine the position and the orientation of the target, the system (5) acts at a single point to measure the direction of the magnetic field in two orthogonal planes, one of which (P1) is normal to the rotary movement (R) and the other of which (P2) is normal to the movement in translation (X).

Abstract: A measuring method of contactless magnetic detection of relative movement along a trajectory between a main creation system and a measuring system sensitive to the direction of the magnetic field, the creation system creating a main magnetic field of direction that varies in a plane detected by the measuring system to determine the relative position along that trajectory. The method includes subjecting the measuring system to a compensation magnetic field of direction that is fixed and opposite to the direction of the maximum main magnetic field measured by the measuring system and delivered uniquely by the main creation system and in determining the direction of a magnetic field resulting from the combination of the main magnetic field and the compensation magnetic field by measuring the two mutually-orthogonal components of the resultant magnetic field respectively varying substantially as cosine and sine functions of the angle of the resultant magnetic field.

Abstract: The invention relates to a magnetic sensor for determining the position of a part (2) movable firstly in rotation over a limited angular stroke by virtue of a rotary movement (R), and secondly in translation along a translation axis (X) and over a limited linear stroke, this sensor including both a magnetized target (3) mounted on and fastened to the movable part (2) and taking the form of a radially-magnetized part-cylinder having an axis of symmetry coinciding with the translation axis (X) and also a system (5) for measuring the magnetic field of the magnetized target to determine the position of the target in three dimensions. According to the invention, in order to determine the position and the orientation of the target, the system (5) acts at a single point to measure the direction of the magnetic field in two orthogonal planes, one of which (P1) is normal to the rotary movement (R) and the other of which (P2) is normal to the movement in translation (X).

Abstract: A measuring method of contactless magnetic detection of relative movement along a trajectory between a main creation system and a measuring system sensitive to the direction of the magnetic field, the creation system creating a main magnetic field of direction that varies in a plane detected by the measuring system to determine the relative position along that trajectory. The method includes subjecting the measuring system to a compensation magnetic field of direction that is fixed and opposite to the direction of the maximum main magnetic field measured by the measuring system and delivered uniquely by the main creation system and in determining the direction of a magnetic field resulting from the combination of the main magnetic field and the compensation magnetic field by measuring the two mutually-orthogonal components of the resultant magnetic field respectively varying substantially as cosine and sine functions of the angle of the resultant magnetic field.