Abstract: A magnetic core for a magnetic field sensor is made from a material having a solid matrix in which are dispersed superparamagnetic particles, the solid matrix being chosen so as not to perturb the magnetic properties of the superparamagnetic particles, and so that the superparamagnetic particles represent a percentage P of the total volume of the core chosen to be greater than 2.5% or chosen in the span defined by the relation L 10%?P?L?1% where L corresponds to a threshold L beyond which the core loses the superparamagnetic properties. A magnetic field sensor that includes the magnetic core and an electronic circuit for measuring a magnetic field induced in the magnetic core.

Abstract: The invention relates to a magnetic field sensor including at least one magnetic core (10) in which the magnetic cycle of the magnetic core is characterised in that the absolute value of the third derivative of the magnetic flux density in relation to the magnetic field is maximum for a zero magnetic field.

Abstract: A device for measuring the position of a mobile part (4), includes: at least one magnetic node (10) capable of modulating the amplitude of an excitation magnetic field according to the amplitude of a magnetic field to be measured, the magnetic node having a magnetic cycle for magnetic induction that depends on the hysteresis-free magnetic field in an operation range [Hmin; Hmax], and in which the magnetic cycle of the magnetic node (10) is characterised in that the absolute value of the third derivative of the magnetic induction relative to the magnetic field is maximal for a zero magnetic field.

Abstract: A sensor for detecting the position and speed of a part mobile along at least one measurement direction includes an estimator (38) adapted to provide estimation of position and speed based on a displacement model of the target during a period of observation Tobs, the model relating the position of the target at a time t included in the period of observation Tobs, at least to the position and the speed to be estimated.

Abstract: A device for measuring the position of a mobile part (4), include: at least one magnetic node (10) capable of modulating the amplitude of an excitation magnetic field according to the amplitude of a magnetic field to be measured, the magnetic node having a magnetic cycle for magnetic induction that depends on the hysteresis-free magnetic field in an operation range [Hmin; Hmax], and in which the magnetic cycle of the magnetic node (10) is characterised in that the absolute value of the third derivative of the magnetic induction relative to the magnetic field is maximal for a zero magnetic field.

Abstract: A sensor for detecting the position and speed of a part mobile along at least one measurement direction includes an estimator (38) adapted to provide estimation of position and speed based on a displacement model of the target during a period of observation Tobs, the model relating the position of the target at a time t included in the period of observation Tobs, at least to the position and the speed to be estimated.