A blade angle feedback assembly for a variable-pitch aircraft propeller rotor rotatable about an axis and having an adjustable blade pitch angle is provided. A feedback device is coupled to rotate with the rotor and to be displaced axially along the axis with adjustment of the blade pitch angle. Sensor(s) mounted adjacent the feedback device are configured to detect a passage of position marker(s) provided on the feedback device as the feedback device rotates. A magnetic shield mounted to the sensor(s) is configured to define a magnetic return path for some magnetic flux of a magnetic field exiting from a first pole of the magnet toward a second pole opposite the first pole. The magnetic shield comprises a wall member positioned adjacent the position marker(s) and configured to span a distance over which the position marker(s) are configured to be displaced with axial displacement of the feedback device.

A magnetic sensor comprises a sensor package and a magnet. The sensor package includes a plurality of lead frames, a magnetic sensor element, and an encapsulation. The plurality of lead frames include a first outer lead and a second outer lead. The first outer lead has a first body and a first protrusion. The second outer lead has a second body and a second protrusion. The magnet includes a magnet body, a first restricting portion, a second restricting portion, a first receiving portion, and a second receiving portion.

A magnetic sensor device includes a switching region defined by a switching range and a variation range, the switching range being set in a stroke direction of a magnet generating a radial magnetic field and defined by a start position and an end position for switching of the state, and the variation range being set in a direction intersecting the stroke direction and being a range of variation in the position of the magnet, and a magnetic sensor including plural first divided elements that are formed by dividing a first circular magneto-resistive element and are consecutively rotated and rearranged around the switching region such that change in a magnetoresistance value due to the magnetic field of the magnet in the switching region increases from the start position to the end position.

A magnetic sensor device includes a switching region defined by a switching range and a variation range, the switching range being set in a stroke direction of a magnet generating a radial magnetic field and defined by a start position and an end position for switching of the state, and the variation range being set in a direction intersecting the stroke direction and being a range of variation in the position of the magnet, and a magnetic sensor including plural first divided elements that are formed by dividing a first circular magneto-resistive element and are consecutively rotated and rearranged around the switching region such that change in a magnetoresistance value due to the magnetic field of the magnet in the switching region increases from the start position to the end position.

An unmanned aerial vehicle includes a body frame, at least two magnetometers disposed at different positions of the body frame, and a processor communicatively coupled with the at least two magnetometers. Each of the at least two magnetometers are configured to measure magnetic field information of a magnetic field in which the unmanned aerial vehicle is positioned. The processor is configured to, in response to the magnetic field information measured by the at least two magnetometers indicating that the unmanned aerial vehicle is subject to a magnetic field interference, initiate a command instructing the unmanned aerial vehicle to stop taking off or to return.

A sensor device comprising: a lead frame; a first/second semiconductor die having a first/second sensor structure at a first/second sensor location, and a plurality of first/second bond pads electrically connected to the lead frame; the semiconductor dies having a square or rectangular shape with a geometric center; the sensor locations are offset from the geometrical centers; the second die is stacked on top of the first die, and is rotated by a non-zero angle and optionally also offset or shifted with respect to the first die, such that a perpendicular projection of the first and second sensor location coincide.

A magnetic body detecting device constituting a magnet portion for magnetizing a magnetic body from a magnet main body portion, and a correcting portion which is disposed in front of magnet main body portion to correct a magnetic field generated by magnet main body portion, wherein the correcting portion is configured to form a specific position N having a desired magnetic field intensity by canceling out the magnetic field generated by magnet main body portion, and to adjust the magnetic field gradient at a magnetic field null point N of the magnetic field generated by magnet portion by causing magnet main body portion to be separated from a front end portion of magnet portion in accordance with the magnetic field gradient in the correcting portion, and wherein a magnetic sensor is disposed at the magnetic field null point N formed in the front end portion of the magnet portion

Apparatuses, systems, and associated methods of manufacturing are described that provide for improved sensor devices. An example sensor device includes a magnet mounting tube and a magnet supported within the magnet mounting tube. The sensor device includes a sensor mounting tube that receives at least a portion of the magnet mounting tube and supported magnet therein. The sensor device includes a magnetic sensor affixed to the sensor mounting tube. The sensor device includes a spring positioned around the magnet mounting tube and the sensor mounting tube such that the magnet and the magnetic sensor are surrounded by the spring. In an instance in which a load is applied to either a first end or second end of the spring, the magnet mounting tube translates relative the sensor mounting tube so as to induce a change in magnetic flux identified by the magnetic sensor indicative of a weight of the load.

A scanning tunneling microscopy based potentiometry system and method for the measurements of the local surface electric potential is presented. A voltage compensation circuit based on this potentiometry system and method is developed and employed to maintain a desired tunneling voltage independent of the bias current flow through the film. The application of this potentiometry system and method to the local sensing of the spin Hall effect is outlined herein, along with the experimental results obtained.

An assembly includes a permanent magnet generating a magnetic field. The permanent magnet is arranged on the rotary member and generates a magnetic field perpendicular to an axis of rotation. A first channel has a first magnetic sensing element centered on the axis of rotation, the first channel providing a first angular data. A second channel has a second magnetic sensing element centered on the axis of rotation, the second channel providing a second angular data. The second magnetic sensing element is spaced from the first magnetic sensing element. Each of the first magnetic sensing element and the second magnetic sensing element have three voltage dividers. A processor computes a magnetic stray field component orthogonal to the magnetic field by comparing a first field strength based on the first angular data with the second field strength based on the second angular data.