Abstract: An inductive movement sensor is provided including: a transducer including a primary winding suitable for producing a magnetic excitation, and a secondary winding including at least one turn, suitable for applying an electromotive force across the terminals thereof in the presence of the excitation; and a target including at least one conductive pattern, the target being suitable for moving parallel to the transducer such as to cause variations in the surface of a portion of the pattern located opposite the at least one turn, thereby causing variations in the amplitude of the electromotive force induced in the secondary winding, in which the target-transducer distance is between 0.8 and 1.5 times the optimum target-transducer distance in terms of linearity, or the distance for which the linearity error of the curve representative of the variation in amplitude as a function of the surface variation is minimal.

Abstract: A transducer for an inductive displacement sensor includes a secondary winding of 2N turns of alternating directions extending in a zone of length Dtot, the winding including: a first coiled conductive section forming N half-turns, extending between a first end of the winding, situated at the midpoint of the length Dtot, and a first point of the winding, situated at one end of the length Dtot; a second section forming N half-turns, extending between the first point and a second intermediate point situated at the midpoint of the length Dtot; a third section forming N half-turns, extending between the second point and a third intermediate point situated at a second end of the length Dtot; and a fourth section forming N half-turns, extending between the third point and a second end of the winding situated at the midpoint of the length Dtot.

Abstract: A target for an inductive displacement sensor is provided, including a plurality of conductive patterns distributed along a zone having a dimension Dtot in a direction, the patterns being defined by the overlay of at least a first set of elementary periodic patterns having a period approximately equal to Dtot/N, including N first elementary conductive patterns of a dimension approximately equal to Dtot/2N in the direction, regularly distributed along the zone, and of a second set of elementary periodic patterns having a period approximately equal to Dtot/(N+r), including N+r second elementary patterns of a dimension approximately equal to Dtot/2(N+r) in the direction, regularly distributed along the zone, where N is an integer greater than or equal to 2 and r is a positive integer, different to zero and less than or equal to N?1, wherein first and second elementary conductive patterns overlap at least partially.

Abstract: Disclosed is a bearing including a bearing ring and an inductive angular displacement sensor of the bearing ring, which includes a transducer and a target. The target is formed from a single conductive metal part and including a face with a base wall and one or a plurality of metal studs projecting from this base wall. The target is fastened firmly to the bearing ring, or is machined directly in the bearing ring.

Abstract: Disclosed is a target for an inductive displacement sensor, including a plurality of conductive patterns distributed along a zone having a dimension Dtot in a direction, the patterns being defined by the overlay of at least a first set of elementary periodic patterns having a period approximately equal to Dtot/N, including N first elementary conductive patterns of a dimension approximately equal to Dtot/2N in the direction, regularly distributed along the zone, and of a second set of elementary periodic patterns having a period approximately equal to Dtot/(N+r), including N+r second elementary patterns of a dimension approximately equal to Dtot/2(N+r) in the direction, regularly distributed along the zone, where N is an integer greater than or equal to 2 and r is a positive integer, different to zero and less than or equal to N?1, wherein first and second elementary conductive patterns overlap at least partially.

Abstract: Disclosed is a bearing including a bearing ring and an inductive angular displacement sensor of the bearing ring, which includes a transducer and a target. The target is formed from a single conductive metal part and including a face with a base wall and one or a plurality of metal studs projecting from this base wall. The target is fastened firmly to the bearing ring, or is machined directly in the bearing ring.

Abstract: Disclosed is an inductive movement sensor including: a transducer including a primary winding suitable for producing a magnetic excitation, and a secondary winding including at least one turn, suitable for applying an electromotive force across the terminals thereof in the presence of the excitation; and a target including at least one conductive pattern, the target being suitable for moving parallel to the transducer such as to cause variations in the surface of a portion of the pattern located opposite the at least one turn, thereby causing variations in the amplitude of the electromotive force induced in the secondary winding, in which the target-transducer distance is between 0.8 and 1.5 times the optimum target-transducer distance in terms of linearity, or the distance for which the linearity error of the curve representative of the variation in amplitude as a function of the surface variation is minimal.

Abstract: Disclosed is a transducer for an inductive displacement sensor, including a secondary winding of 2N turns of alternating directions extending in a zone of length Dtot, the winding including: a first coiled conductive section forming N half-turns, extending between a first end of the winding, situated at the midpoint of the length Dtot, and a first point of the winding, situated at one end of the length Dtot; a second section forming N half-turns, extending between the first point and a second intermediate point situated at the midpoint of the length Dtot; a third section forming N half-turns, extending between the second point and a third intermediate point situated at a second end of the length Dtot; and a fourth section forming N half-turns, extending between the third point and a second end of the winding situated at the midpoint of the length Dtot.

Abstract: A permanent or variable magnetic field circulation sensor including apparatus for magnetic excitation further including at least one elongated excitation coil extending around an elongated supple magnetic core and including a supple magnetic material with low relative magnetic permeability having a supple or flexible matrix in which magnetic particles are dispersed, an excitation current generation unit coupled to the excitation coil to generate an excitation magnetic field in the core over substantially the entire length of the coil, apparatus for measurement including: at least one magnetic measuring transducer magnetically coupled to the apparatus for magnetic excitation, a measuring unit connected to the magnetic measuring transducer and suitable for providing a measurement of magnetic field circulation in the core.

Abstract: A permanent or variable magnetic field circulation sensor including apparatus for magnetic excitation further including at least one elongated excitation coil extending around an elongated supple magnetic core and including a supple magnetic material with low relative magnetic permeability having a supple or flexible matrix in which magnetic particles are dispersed, an excitation current generation unit coupled to the excitation coil to generate an excitation magnetic field in the core over substantially the entire length of the coil, apparatus for measurement including: at least one magnetic measuring transducer magnetically coupled to the apparatus for magnetic excitation, a measuring unit connected to the magnetic measuring transducer and suitable for providing a measurement of magnetic field circulation in the core.