An electric winch control module of this disclosure provides improved means for detecting changes in a current carried by an electric winch motor power lead. The module's housing includes a magnetic flux shield contained within an exposed channel of the housing and located at or toward a vertical centerline of the channel and opposite a magnetic flux sensor of the control module. The magnetic flux shield is made of a ferromagnetic material and includes a bottom wall spanning the width of the open bottom of the channel, an open top arranged opposite the top wall of the channel, and opposing sidewalls opposite a respective sidewall of the channel. The shield surrounds the side and lower portions of the lead below the sensor when in the channel, shielding the wire and sensor from outside interference while at the same time exposing an upper portion of the lead to the sensor.

In a described example, a structure includes a substrate having a surface with multiple sides. A sensor is positioned within the substrate and a seed layer is over at least four sides of the surface of the substrate. A magnetic shield layer is over the seed layer for the at least four sides of the surface of the substrate.

A magnetic sensor is disclosed. The magnetic sensor can include a sensing element and a magnetic shield. The sensing element and the magnetic shield can be vertically stacked with one another. The magnetic shield can be a magnetic shield plate that includes ferromagnetic portions spaced laterally by a non-ferromagnetic material. The sensing element can have a first side and a second side opposite the first side. The magnetic shield that can be vertically stacked over the first side of the sensing element. The magnetic shield can be spaced apart from the sensing element by an isolation layer. A passivation layer can cover at least a portion of the sensing element or the magnetic shield. The sensing element can be configured to sense a magnetic field property of a magnetic field source that is positioned on the second side of the sensing element.

A method for calibrating a magnetometer of an electronic device can include detecting a change in a magnetism of the electronic device, collecting a first magnetic field data from the magnetometer at sampling frequency of at least 1 hertz, generating an elliptical calibration model based at least partially on the collected first magnetic field data, collecting a second magnetic field data from the magnetometer, and fitting the collected second magnetic field data to a sphere using the elliptical calibration model.

A magnetic sensor for detecting magnetism generated from a conductor in which a current flows in a first direction includes a magnetic detection unit capable of detecting the magnetism, a magnetization core, and a magnetic shield. The magnetization core includes a first core section, which is substantially parallel to the first direction, and a second core section and third core section, which are each continuous from both end portions of the first core section in a second direction that is orthogonal to the first direction. The second core section and the third core section each extend from an end portion of the first core section to follow a third direction that is orthogonal to the first direction and the second direction. The magnetic detection unit has a sensitivity direction in the second direction and is positioned in a core gap sandwiched between the vicinity of the end portion of the second core section and the vicinity of the end portion of the third core section in the third direction. The magnetic shield includes a plate-shaped shield portion positioned to overlap the core gap when viewed along the third direction.

A wearable audio device with a magnetic field sensor that is constructed and arranged to sense the Earth's magnetic field. A magnet in the earphone, for example the magnet of the electro-acoustic transducer, produces a first magnetic field having a first magnetic field strength. A nulling magnet produces a nulling magnetic field along at least a first nulling magnet axis. The nulling magnet is configured to reduce an influence of the first magnetic field on the magnetic field sensor. The first nulling magnet axis, the first magnet axis, and the first sense axis are aligned.

An electronic magnetometer and a method for measuring a magnetic field are provided. A Gunn diode with magnetic shielding and a Gunn diode without magnetic shielding generate different induced high-frequency oscillating currents in various environments. The high-frequency oscillating current of the Gunn diode with magnetic shielding and the high-frequency oscillating current of the Gunn diode without magnetic shielding are processed by circuits and subsequently compared. The difference of frequencies in the two currents is proportional to the magnitude of magnetic field, and the magnitude of magnetic field is obtained.

A magnetic field sensor includes a substrate, a first channel comprising a first magnetic field sensing element supported by the substrate and configured to generate a first magnetic field signal indicative of a first magnetic field experienced by the first magnetic field sensing element, a second channel comprising a second magnetic field sensing element supported by the substrate and configured to generate a second magnetic field signal indicative of a second magnetic field experienced by the second magnetic field sensing element, and at least one shield configured to reduce a bandwidth of the first magnetic field by a first amount and to reduce a bandwidth of the second magnetic field by a second amount. The shield is able to act as a magnetic anti-aliasing filter for the magnetic field sensing elements, which can then be chopped or sampled.

A magnetic field sensor for measuring a variable magnetic field, in particular for a movement sensor or position sensor, has a magnetoresistive sensor chip and a flat sensor carrier carrying the sensor chip. The carrier has an upper side from which the sensor chip is electrically contactable, the upper side of the sensor carrier having a recess or depression in which the sensor chip is arranged. The sensor chip is electrically contactable from the upper side and that the sensor chip receives a magnetic field to be measured via an underside of the sensor carrier. A manufacturing method for manufacturing an above magnetic field sensor and a measuring method are proposed.

A current sensor includes an electrical-conduction member, a magnetoelectric converter, and a shield. The shield includes a first shield and a second shield each having a plate shape. The first shield and the second shield being arranged such that surfaces are opposed to and spaced away from each other. A part of the electrical-conduction member and the magnetoelectric converter are located between the surface of the first shield and the surface of the second shield. The part of the electrical-conduction member extends in an extension direction that is along the surface of the first shield. At least one of the first shield and the second shield has an anisotropy in magnetic permeability in which the magnetic permeability in a lateral direction that is along the surface of the first shield and perpendicular to the extension direction is higher than the magnetic permeability in the extension direction.