Abstract: Current sensor comprising: one pair, of identical electrical coils with superparamagnetic cores and surrounded by a common shielding braid; a direct current excitation means configured to make a direct current flow in at least one of the coils of the pair of coils and a means of adjusting an intensity of the direct current; a first alternating current excitation means configured to make an alternating current flow at a first frequency in the coils of the pair that the direct current flows through; a second alternating current excitation means configured to make an alternating current flow at a second frequency greater than the first frequency in the two coils of the pair of coils; a means of measuring an electromotive force of the Noel Effect® type at the terminals of the two coils of the pair.

Abstract: A device for measuring an amount of superparamagnetic material comprises a pair of measuring coils and a pair of compensating coils, wherein the coils of a pair are identical to each other. The device also includes at least one direct current generator, a low-frequency generator, and a high-frequency generator, the generators being coupled to the first and second pairs to inject into each of the coils a current having a DC component, a high-frequency component and a low-frequency component, such that the magnetic fields generated by the coils of the same pair are identical. The device also comprises a detector of a component of an electric voltage set at a mixing frequency which is a linear combination of the first and the second frequency.

Abstract: The invention relates to a member (O1) for measuring a magnitude representative of a common mode voltage (Vres) in an electrical network (1) or in an equipment (E), the network (1) or the equipment (E) comprising at least one first power conductor (C1) and a second power conductor (C2). The measuring member (O1) comprises a sensor formed by two resistive elements (R1, R2) which are intended to be arranged in a bridge between the two power conductors (C1, C2) and have resistance values which are identical to each other. The two resistive elements (R1, R2) are connected at a midpoint (T3). The sensor also comprises a measuring dipole (SH) connected to the midpoint (T3) and to a connection terminal intended to be electrically connected to a common conductor (Cc), of which the electrical network (1) or the equipment (E) has been equipped.

Abstract: Current sensor comprising: one pair, of identical electrical coils with superparamagnetic cores and surrounded by a common shielding braid; a direct current excitation means configured to make a direct current flow in at least one of the coils of the pair of coils and a means of adjusting an intensity of the direct current; a first alternating current excitation means configured to make an alternating current flow at a first frequency in the coils of the pair that the direct current flows through; a second alternating current excitation means configured to make an alternating current flow at a second frequency greater than the first frequency in the two coils of the pair of coils; a means of measuring an electromotive force of the Néel Effect® type at the terminals of the two coils of the pair.

Abstract: The invention relates to a device (D) for detecting a fault in an electrical network (1), comprising at least one electrical equipment (E) which is electrically connected to a first power conductor (C1) and to a second power conductor (C2), the electrical network (1) being provided with a common conductor (Cc). The device comprises a first measuring member (O1) of the common mode voltage present on the power conductors (C1, C2) and a second measuring member (O2) of a current flowing in the power conductors (C1, C2). The device also comprises a calculator (UP) configured to determine over a determined observation period a mixed energy (Emix) transported in the measurement region from the first variable (Vres) and the second variable (Inet). The invention also relates to an equipment, a localization system and a method for detecting a fault in an electrical network.

Abstract: A member for measuring a variable representative of a common mode voltage in an electrical network a device. The network or the device includes at least a first power conductor and a second power conductor. The measuring member has two capacitive elements which are intended to be arranged in a bridge between the two power conductors and have capacity values that are identical to each other. The two capacitive elements are connected at a midpoint. The measuring member also includes a two-terminal measurement circuit connected on the one hand to the midpoint and on the other hand to a connection terminal intended to be electrically connected to a common conductor provided in the electrical network or device.

Abstract: An electric circuit for measuring a current flowing in a conductor comprising: 2×N coils, N being an integer greater than or equal to 2, connected in series together; and a common mode filtering element associated with each of the 2×N coils, each filtering element being placed in parallel with the associated coil and being able to accomplish common mode filtering of the 2×N coils, a core of the 2×N coils having a relative permeability less than 10, and among the 2×N coils, N coils being wound in a direction opposite to the winding direction of the N other coils.

Abstract: Electrical circuit for measuring a current flowing in a conductor comprising: a first pair of Rogowski-type coils connected in series, the Rogowski-type coils of the first pair being able to operate in a first frequency band; a second pair of Rogowski-type coils connected in series, the Rogowski-type coils of the second pair being able to operate in a second frequency band, the second frequency band comprising at least partly frequencies higher than the frequencies of the first frequency band; and a means for electrically shielding the first pair of coils, and wherein a core of the Rogowski-type coils of the first and second pairs has a relative permeability of less than 10 and wherein one coil of each pair comprises at least one multi-turn winding, the other coil of the pair comprising at least one multi-turn winding.

Abstract: An electric circuit for measuring a current flowing in a conductor comprising: 2×N coils, N being an integer greater than or equal to 2, connected in series together; and a common mode filtering element associated with each of the 2×N coils, each filtering element being placed in parallel with the associated coil and being able to accomplish common mode filtering of the 2×N coils, a core of the 2×N coils having a relative permeability less than 10, and among the 2×N coils, N coils being wound in a direction opposite to the winding direction of the N other coils.

Abstract: Electrical circuit for measuring a current flowing in a conductor comprising: a first pair of Rogowski-type coils connected in series, the Rogowski-type coils of the first pair being able to operate in a first frequency band; a second pair of Rogowski-type coils connected in series, the Rogowski-type coils of the second pair being able to operate in a second frequency band, the second frequency band comprising at least partly frequencies higher than the frequencies of the first frequency band; and a means for electrically shielding the first pair of coils, and wherein a core of the Rogowski-type coils of the first and second pairs has a relative permeability of less than 10 and wherein one coil of each pair comprises at least one multi-turn winding, the other coil of the pair comprising at least one multi-turn winding.

Abstract: The invention relates to a member (O1) for measuring a magnitude representative of a common mode voltage (Vres) in an electrical network (1) or in an equipment (E), the network (1) or the equipment (E) comprising at least one first power conductor (C1) and a second power conductor (C2). The measuring member (O1) comprises a sensor formed by two resistive elements (R1, R2) which are intended to be arranged in a bridge between the two power conductors (C1, C2) and have resistance values which are identical to each other. The two resistive elements (R1, R2) are connected at a midpoint (T3). The sensor also comprises a measuring dipole (SH) connected to the midpoint (T3) and to a connection terminal intended to be electrically connected to a common conductor (Cc), of which the electrical network (1) or the equipment (E) has been equipped.

Abstract: The invention relates to a device (D) for detecting a fault in an electrical network (1), comprising at least one electrical quipment (E) which is electrically connected to a first power conductor (C1) and to a second power conductor (C2), the electrical network (1) being provided with a common conductor (Cc). The device comprises a first measuring member (O1) of the common mode voltage present on the power conductors (C1, C2) and a second measuring member (O2) of a current flowing in the power conductors (C1, C2). The device also comprises a calculator (UP) configured to determine over a determined observation period a mixed energy (Emix) transported in the measurement region from the first variable (Vres) and the second variable (Inet). The invention also relates to an equipment, a localization system and a method for detecting a fault in an electrical network.

Abstract: The invention relates to a member (O1) for measuring a variable representative of a common mode voltage (Vres) in an electrical network (1) or in a device (E), the network (1) or the device (E) comprising at least a first power conductor (C1) and a second power conductor (C2), the measuring member (O1) comprising two capacitive elements (EC1, EC2) which are intended to be arranged in a bridge between the two power conductors (C1, C2) and have capacity values that are identical to each other, wherein the two capacitive elements (EC1, EC2) are connected at a midpoint (M). The measuring member (O1) also comprises a two-terminal measurement circuit (SH) connected on the one hand to the midpoint (M) and on the other hand to a connection terminal intended to be electrically connected to a common conductor (Cc) provided in the electrical network (1) or the device (E).

Abstract: An analysis medium for immunoassay comprises a substrate for promoting the natural or forced flow of a liquid sample likely to comprise analytes, the substrate having a capture zone. The capture zone comprises, immobilized on or in the substrate, a plurality of first capture agents capable of selectively retaining complexes bound to the analytes and a plurality of second capture agents capable of selectively retaining reference agents. A method for detecting the presence of analytes in a liquid sample may be performed using this analysis medium.

Abstract: The present invention relates to a device for measuring a magnetic field and, more specifically, for measuring direct and/or alternating currents circulating in a primary conductor. The current sensor 1 according to the invention comprises: •at least two magnetic transducers 2, 3, each comprising at least one elongate coil 5, 6, forming a loop surrounding the primary conductor; •at least one loop closure mechanism allowing two ends of the coils 5, 6 of a transducer 2, 3 to be retained while providing: —a negative mechanical gap between the two ends of the coils 5, 6 closing each loop, along a first elongation axis Y of the coils 5, 6; an offset of each end of a coil 5, 6 of a loop relative to the other end of a coil of the loop, along an offset axis X; —a mechanical inversion of the offsets between the loops.

Abstract: The present invention relates to a device for measuring a magnetic field and, more specifically, for measuring direct and/or alternating currents circulating in a primary conductor. The current sensor 1 according to the invention comprises: •at least two magnetic transducers 2, 3, each comprising at least one elongate coil 5, 6, forming a loop surrounding the primary conductor; •at least one loop closure mechanism allowing two ends of the coils 5, 6 of a transducer 2, 3 to be retained while providing: —a negative mechanical gap between the two ends of the coils 5, 6 closing each loop, along a first elongation axis Y of the coils 5, 6; an offset of each end of a coil 5, 6 of a loop relative to the other end of a coil of the loop, along an offset axis X; —a mechanical inversion of the offsets between the loops.

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.

Abstract: The invention relates to a method for characterizing a ferroelectric material, comprising application of an electric voltage to a sample of said ferroelectric material, measuring the electric current flowing through said sample, and joint treatment of the applied voltage signal and the measured current signal in order to provide representation data characterizing the polarization of the ferroelectric material. The method also includes controlling the applied electric voltage in such a way that superpositioning can be performed for a first current component having a large signal amplitude at a first frequency and a second current component having a second small signal amplitude at a second frequency which is much greater than the first frequency, and identifying the characteristics of the ferromagnetic material respectively associated with locally reversible polarization effects and locally irreversible polarization effects.

Abstract: The invention relates to a method for characterizing a ferroelectric material, comprising application of an electric voltage to a sample of said ferroelectric material, measuring the electric current flowing through said sample, and joint treatment of the applied voltage signal and the measured current signal in order to provide representation data characterizing the polarization of the ferroelectric material. The method also includes controlling the applied electric voltage in such a way that superpositioning can be performed for a first current component having a large signal amplitude at a first frequency and a second current component having a second small signal amplitude at a second frequency which is much greater than the first frequency, and identifying the characteristics of the ferromagnetic material respectively associated with locally reversible polarization effects and locally irreversible polarization effects.