A magnetism detection device includes: a transmission line set having a transmission line including a linear first conductor including a magnetic material; and a detector that: inputs, from a first end of the transmission line set, a pulse signal as a first incident wave and detects, at the first end, a first reflected wave of the first incident wave; inputs, from a second end opposite to the first end, a pulse signal as a second incident wave and detects, at the second end, a second reflected wave of the second incident wave; and detects a strength of a magnetic field applied to the transmission line set based on compositing of the first reflected wave and the second reflected wave.

A transducer assembly includes a mounting base, a collar, a magnet, and a Hall effect sensor. The collar defines a bore and extends from a proximal end to a distal end. The proximal end is fixedly coupled with the mounting base. One of the magnet and the Hall effect sensor is disposed within the bore and fixedly coupled to the mounting base. The other of the magnet and the Hall effect sensor is fixedly coupled to the distal end of the collar. The Hall effect sensor is spaced longitudinally from the magnet and is configured to detect lateral deflection of the distal end of the collar. Methods are also provided.

The invention discloses a multi-sensor position measurement system mainly comprising a base, a carrier and a modular component, the carrier is provided with a first signal array and a second signal array. The modular component is disposed on the base, and comprises two Hall sensors for sensing magnetic field changes of the first signal array, two magnetoresistive sensors for sensing magnetic field changes of the second signal array, and a first state sensor having a marking unit disposed on the carrier and a sensitive element disposed on the base for sensing signals generated by the marking unit for subsequent reference signal generation, connection of measurement results between other sensors, and identification of homing direction.

The magnetic detection device includes: a first magnetic rotary body which rotates about a rotation shaft and has an outer circumferential portion which is a magnetic body; a second magnetic rotary body has an outer circumferential portion which is a magnetic body; a magnet which has a magnetization direction along the axial direction; a first magneto-resistive element provided on another side in the axial direction of the magnet; a second magneto-resistive element provided on one side in the axial direction of the magnet; a first magnetic guide provided between the magnet and the first magneto-resistive element; and a second magnetic guide provided between the magnet and the second magneto-resistive element, wherein the outer circumferential portion of the first magnetic rotary body and the outer circumferential portion of the second magnetic rotary body cause different magnetic fields between the magnet and the respective outer circumferential portions.

A system and a method can use a magnetic field sensor to measure rotation angles of a ferromagnetic object in the form of a screw having screw threads. The magnetic field sensor can use a plurality of correction coefficients to improve an accuracy of the measured rotation angles of the ferromagnetic object. The magnetic field sensor can be disposed to a side of the screw.

An electronic system for monitoring a trailer hitch assembly having a hitch plate with a throat for receiving a kingpin of a trailer and a locking mechanism for locking the kingpin in the throat, the electronic system determining whether the trailer hitch assembly is properly coupled to the trailer and including a plurality of magnets each creating a magnetic flux, at least one Hall-effect sensor for sensing the position of a kingpin of a trailer relative to the throat of the hitch plate by measuring the magnetic flux, and a circuit member comprising a magnetically permeable material, wherein the plurality of magnets, the at least one Hall-effect sensor, and the circuit member are each in series with one another.

A blade angle feedback assembly for a variable-pitch rotor of an aircraft engine, the rotor rotatable about an axis and having rotor blades rotatable about respective spanwise axes to adjust a blade angle thereof, is provided. A sensor is configured to provide feedback on the blade angle of the rotor blades by detecting a relative movement between the sensor and a feedback device having at least one position marker thereon. The sensor comprises a magnet having a magnetic field and a first pole and a second pole opposite the first pole. A magnetic shield is configured to define a magnetic return path for at least a portion of a magnetic flux of the magnetic field exiting from the first pole of the magnet toward the second pole, the magnetic shield comprising at least one wall member spanning a distance of relative displacement between the feedback device and the sensor.

In one aspect, a magnetic-field sensor includes main coil circuitry configured to generate a first magnetic-field signal at a first frequency; a first channel; a second channel; a subtractor circuit configured to subtract a second channel output signal from a first channel output signal to form a subtraction signal; an adder circuit configured to combine the first channel output signal and the second channel output signal to form a summation signal; processing circuitry configured to receive the summation signal and to provide a magnetic-field sensor output signal indicating a position of the target; feedback circuitry configured to receive the subtraction signal and to provide a first feedback signal to the processing circuitry, and a second feedback signal; and a secondary coil circuitry configured to receive the second feedback signal and to generate, based on the second feedback signal, a second magnetic-field signal to reduce the first magnetic-field signal received.

Provided is a sensor device provided with improved reproducibility of a switching characteristic and reduced average consumption current. A sensor device include: a sensor; a drive circuit configured to drive the sensor; a processing circuit configured to output a binary result signal obtained by binarizing an electrical signal output from the sensor; a determination circuit configured to capture the binary result signal a plurality of times and perform a predetermined logical determination processing; a latch circuit configured to capture an output signal of the determination circuit; an output terminal; and a control circuit configured to output a control signal for intermittently controlling at least one of the drive circuit and the processing circuit such that an operation period and a pause period are repeated with a predetermined cycle. The operation period is interrupted and caused to transition to the pause period in a predetermined case.

A position detection system includes: two magnet rows including a plurality of magnets arrayed cyclically and repeatedly with an array pattern as one cycle in a detection direction, a magnet in the magnet row and a magnet in the magnet row facing each other at surfaces having different polarities at a specific position in the detection direction; a magnetic sensor disposed between the two magnet rows, a relative position of the magnetic sensor relative to the two magnet rows in the X-axis direction being variable; and a determiner that determines a position of the magnetic sensor in an predetermined direction relative to the two magnet rows based on a detection value of the magnetic sensor.