Abstract: A wear monitoring device for rolling elements in a machine element has at least one magnet generating a measuring magnetic field, and a magnetic field sensor arrangement for measuring a flux density of the measuring magnetic field. The sensor arrangement has at least one first magnetic field sensor for measuring the flux density at a first measuring position and a second magnetic field sensor for measuring the flux density at a second measuring position at a distance from the first measuring position. The measuring positions are selected such that rolling elements passing the measuring positions are in close contact with one another and a resulting change in the measuring magnetic field is detectable at a measuring position by the respective magnetic field sensor. An evaluation unit records and evaluates the flux densities measured by the magnetic field sensors, to determine diameters and/or changes in the diameters of the rolling elements.

Abstract: A current sensor for magnetic field-based current determination of an alternating current through a current conductor is based on a magnetic field-sensitive sensor element. The sensor element is arranged spatially adjacent the current conductor to detect a magnetic field brought about by the alternating current I in the current conductor. It is proposed that at least one conductive compensation element be arranged separately from the current flow through the current conductor and spatially adjacent the sensor element and the current conductor to compensate frequency-dependent distortions of the magnetic field by means of an induction-generatable compensation magnetic field.

Abstract: A multiphase current measuring apparatus and method for measuring current of a multiconductor current system with N current conductors, where N>2, by determining a magnetic field strength difference in a measurement plane between conductor currents of adjacent current conductors by using the multiphase current measuring apparatus having N?1 magnetoresistive gradient sensors. At least one bypass conductor of at least one of the further current conductors is arranged with respect to each magnetoresistive gradient sensor for compensating a DC field component of the two adjacent current conductors. The DC component of the conductor currents of the two adjacent current conductors is suppressed by passing a bypass current of the at least one further current conductor through the bypass conductor symmetrically through the measurement plane of the magnetoresistive gradient sensor.

Abstract: A current sensor for magnetic field-based current determination of an alternating current through a current conductor is based on a magnetic field-sensitive sensor element. The sensor element is arranged spatially adjacent the current conductor to detect a magnetic field brought about by the alternating current I in the current conductor. It is proposed that at least one conductive compensation element be arranged separately from the current flow through the current conductor and spatially adjacent the sensor element and the current conductor to compensate frequency-dependent distortions of the magnetic field by means of an induction-generatable compensation magnetic field.

Abstract: A wear monitoring device for rolling elements in a machine element has at least one magnet generating a measuring magnetic field, and a magnetic field sensor arrangement for measuring a flux density of the measuring magnetic field. The sensor arrangement has at least one first magnetic field sensor for measuring the flux density at a first measuring position and a second magnetic field sensor for measuring the flux density at a second measuring position at a distance from the first measuring position. The measuring positions are selected such that rolling elements passing the measuring positions are in close contact with one another and a resulting change in the measuring magnetic field is detectable at a measuring position by the respective magnetic field sensor. An evaluation unit records and evaluates the flux densities measured by the magnetic field sensors, to determine diameters and/or changes in the diameters of the rolling elements.

Abstract: A multiphase current measuring apparatus and method for measuring current of a multiconductor current system with N current conductors, where N>2, by determining a magnetic field strength difference in a measurement plane between conductor currents of adjacent current conductors by using the multiphase current measuring apparatus having N?1 magnetoresistive gradient sensors. At least one bypass conductor of at least one of the further current conductors is arranged with respect to each magnetoresistive gradient sensor for compensating a DC field component of the two adjacent current conductors. The DC component of the conductor currents of the two adjacent current conductors is suppressed by passing a bypass current of the at least one further current conductor through the bypass conductor symmetrically through the measurement plane of the magnetoresistive gradient sensor.

Abstract: A current sensor assembly includes a magnetoresistive gradient sensor which is arranged between two conductor portions of a current conductor. The conductor portions subdivide the current and carry it in the same direction with regard to the arrangement of the magnetoresistive gradient sensor, and the conductor portions are height-offset with regard to a measurement plane of the magnetoresistive gradient sensor.

Abstract: A method and an apparatus are for the permanent magnetization of at least one ferromagnetic layer in a magnetic field sensor device deposited on a chip substrate. The method includes production of at least one resistance element on a chip substrate, deposition of at least one soft magnetic structuring element on the chip substrate; heating of the resistance element to above the blocking temperature and coupling of a preconditioning magnetic field; cooling of the resistance element to below the blocking temperature; and removal of the preconditioning magnetic field. The soft magnetic structuring element is arranged such that the coupled preconditioning magnetic field penetrates the structuring element substantially perpendicular to the chip surface and, at the location of the resistance element, generates magnetic field components parallel to the chip surface which penetrate the ferromagnetic layer of the resistance element at least in some areas.

Abstract: A method and an apparatus are for the permanent magnetisation of at least one ferromagnetic layer in a magnetic field sensor device deposited on a chip substrate. The method includes production of at least one resistance element on a chip substrate, deposition of at least one soft magnetic structuring element on the chip substrate; heating of the resistance element to above the blocking temperature and coupling of a preconditioning magnetic field; cooling of the resistance element to below the blocking temperature; and removal of the preconditioning magnetic field. The soft magnetic structuring element is arranged such that the coupled preconditioning magnetic field penetrates the structuring element substantially perpendicular to the chip surface and, at the location of the resistance element, generates magnetic field components parallel to the chip surface which penetrate the ferromagnetic layer of the resistance element at least in some areas.

Abstract: A magnetic field sensor apparatus for determining two or three components of a magnetic field includes at least one Wheatstone bridge with two half-bridges, wherein each half-bridge includes at least two bridge resistors, and at least one of the two bridge resistors is a magnetic-field-sensitive resistor with respect to a magnetic field component in an X/Y magnetic field sensor plane. Arranged symmetrically between the two magnetic-field-sensitive bridge resistors is a ferromagnetic flux concentration element which generates magnetic field components which are anti-symmetric with respect to a Z magnetic field component oriented perpendicular to the X/Y magnetic field sensor plane and are in the X/Y magnetic field sensor plane. A coordinate aspect proposes a method for determining a two-dimensional or three-dimensional orientation of an external magnetic field by such a magnetic field sensor apparatus.

Abstract: A magnetic field sensor apparatus for determining two or three components of a magnetic field includes at least one Wheatstone bridge with two half-bridges, wherein each half-bridge includes at least two bridge resistors, and at least one of the two bridge resistors is a magnetic-field-sensitive resistor with respect to a magnetic field component in an X/Y magnetic field sensor plane, Arranged symmetrically between the two magnetic-field-sensitive bridge resistors is a ferromagnetic flux concentration element which generates magnetic field components which are anti-symmetric with respect to a Z magnetic field component oriented perpendicular to the X/Y magnetic field sensor plane and are in the X/Y magnetic field sensor plane. A coordinate aspect proposes a method for determining a two-dimensional three-dimensional orientation of an external magnetic field by such a magnetic field sensor apparatus.