Fluxgate current transducer including a fluxgate device comprising a saturable soft magnetic core and an excitation coil, and a processing circuit comprising a control circuit and a voltage generator connected to the control circuit for generating an alternating current in the excitation coil, the voltage generator generating a voltage oscillating between a maximum positive voltage (+U) and a maximum negative voltage (−U) configured to alternatingly saturate the soft magnetic core. The signal processing circuit comprises an overload circuit portion connected to the control circuit, configured to generate overload currents through the excitation coil over time windows (Tn) after detection of the excitation coil current reaching positive and negative threshold currents (+S3, −S3) representative of saturation of the magnetic core, during at least one of a plurality of alternating voltage periods (P).

Fluxgate current transducer including a fluxgate device comprising a saturable soft magnetic core and an excitation coil, and a processing circuit comprising a control circuit and a voltage generator connected to the control circuit for generating an alternating current in the excitation coil, the voltage generator generating a voltage oscillating between a maximum positive voltage (+U) and a maximum negative voltage (−U) configured to alternatingly saturate the soft magnetic core. The signal processing circuit comprises an overload circuit portion connected to the control circuit, configured to generate overload currents through the excitation coil over time windows (Tn) after detection of the excitation coil current reaching positive and negative threshold currents (+S3, −S3) representative of saturation of the magnetic core, during at least one of a plurality of alternating voltage periods (P).

A calibration method for calibrating a magnetizable core, wherein the magnetizable core is coupled to a magnetic transducer; the method comprising applying a pulse of magnetomotive force to the core such that a distinct value of remanence is produced in the core, wherein the value of remanence in the core depends on a strength of the pulse.

Systems and methods are provided for determining a position of a magnet. The systems and methods utilize a first sensor located at a first sensor position and arranged to measure at least two components of a magnetic field produced by the magnet, a second sensor located at a second sensor position and arranged to measure at least two components of the magnetic field produced by the magnet, and processing circuitry operatively connected to the first and second sensors to receive signals derived from signals outputted by the first and second sensors. A field angle is calculated from a first differential field of a first field dimension and a second differential field of a second field dimension orthogonal to the first field dimension. The first and second differential fields are calculated based on signals outputted by the first and second sensors.

Systems and methods are provided for determining a position of a magnet. The systems and methods utilize a first sensor located at a first sensor position and arranged to measure at least two components of a magnetic field produced by the magnet, a second sensor located at a second sensor position and arranged to measure at least two components of the magnetic field produced by the magnet, and processing circuitry operatively connected to the first and second sensors to receive signals derived from signals outputted by the first and second sensors. A field angle is calculated from a first differential field of a first field dimension and a second differential field of a second field dimension orthogonal to the first field dimension. The first and second differential fields are calculated based on signals outputted by the first and second sensors.

Aspects of this disclosure relate to one or more particles that move within a container in response to a magnetic field. A measurement circuit is configured to output an indication of the magnetic field based on position of the one or more particles.

An integrated magnetometer comprises at least one field sensor unit including a first transducer element for generating, in response to a detected magnetic field, a first electrical output signal. At least one gradient sensor unit of the magnetometer includes at least a pair of second transducer elements which are arranged to detect the magnetic field at two different locations and generate, in response to the detected magnetic field, a second electrical output signal. The first and second transducer elements are formed on a common substrate and are encompassed by a common protective layer and/or housing.

An offset data acquisition method and device of a fluxgate magnetometer are provided by the present disclosure, wherein the offset data acquisition method of the fluxgate magnetometer comprises: controlling the first analog switch, the second analog switch and the third analog switch to change directions within a preset period to obtain eight switch direction combinations between the first analog switch, the second analog switch and the third analog switch; acquiring magnetic field measurement data corresponding to an each of the switch direction combinations; and the magnetic field measurement data comprises x-axis magnetic field measurement data, y-axis magnetic field measurement data and z-axis magnetic field measurement data; and acquiring the offset data based on influence factors of an offset and the magnetic field measurement data within the preset period.

An offset data acquisition method and device of a fluxgate magnetometer are provided by the present disclosure, wherein the offset data acquisition method of the fluxgate magnetometer comprises: controlling the first analog switch, the second analog switch and the third analog switch to change directions within a preset period to obtain eight switch direction combinations between the first analog switch, the second analog switch and the third analog switch; acquiring magnetic field measurement data corresponding to an each of the switch direction combinations; and the magnetic field measurement data comprises x-axis magnetic field measurement data, y-axis magnetic field measurement data and z-axis magnetic field measurement data; and acquiring the offset data based on influence factors of an offset and the magnetic field measurement data within the preset period.

An exemplary embodiment of a sensor system includes a magnet system which is designed to generate a magnetic field. Furthermore, the sensor system includes a first magnetic field sensor which is movable in a first direction relative to the magnet system and has a first distance from the magnet system in a second direction perpendicular to the first direction. The sensor system also includes a second magnetic field sensor which is movable in the first direction relative to the magnet system and has a second distance from the magnet system in the second direction, the second distance being greater than the first distance.