This proximity sensor includes: a cylindrical housing having an opening at one end in the axial direction; a detection part housed at the other end of the housing and detecting the presence or absence of a detection target contactlessly; a substrate housed in the housing and mounted with a control circuit for controlling the detection part; a detection part shield preventing external noise from entering the detection part and including a first face part adhered to the front surface on the other side of the detection part, and a side face part configured from multiple side pieces connected to the outer periphery of the first face part and bent from the first face part to cover the side surface of the detection part; and a resin provided around the detection part and the detection part shield.

Disclosed is a movement sensing device adapted to sense an amount of movement of an object. The movement sensing device includes a first magnetic sensor, a second magnetic sensor, a special-shaped magnetic element, and a controller. The special-shaped magnetic element has a magnetization direction, is connected with the object, and is adapted to be moved along a direction parallel to a connection line between the first magnetic sensor and the second magnetic sensor. The special-shaped magnetic element, the first magnetic sensor, and the second magnetic sensor are disposed on a plane. The magnetization direction is perpendicular to the plane. The controller is electrically connected to the first magnetic sensor and the second magnetic sensor. The controller calculates the amount of movement according to a difference between magnetic forces sensed by the first magnetic sensor and the second magnetic sensor from the special-shaped magnetic element.

Example magnetic sensor system includes a magnet mounted on a rotatable shaft, and a magnetic sensing device in a vicinity of the magnet. The magnetic sensing device includes an angle sensor configured to detect an orientation of a magnetic field generated by the magnet as the rotatable shaft is rotated, a magnetic multi-turn sensor configured to detect a number of turns of the magnetic field generated by the magnet as the rotatable shaft is rotated, a magnetic disk mounted on the rotatable shaft, wherein the disk comprises at least a first track for inducing a change in a magnetic field generated by the magnetic disk, wherein the first track is formed from a plurality of curved segments distributed around the circumference of the magnetic disk, and a first incremental sensor configured to detect changes in the magnetic field induced by the first track as the rotatable shaft is rotated.

Magnetic field detectors include a proof mass suspended by deformable arms similar to a three dimensional accelerometer. The magnetic field detectors further include magnetically sensitive material present on the proof mass and/or deformable arms to cause movement of the proof mass and/or deformable arms when in the presence of a magnetic field. This movement is converted to an electrical signal and that electrical signal is compared to a reference to determine if a magnetic field of interest is present. The magnetic field detector may be included within an implantable medical device, and when the magnetic field detector indicates that a magnetic field of an MRI scanner is present, the implantable medical device may switch to an MRI mode of operation. The device may also switch back to a normal mode of operation once the MRI scanner is no longer detected such as after a predefined amount of time.

A magnetic sensor comprising: an application specific integrated circuit (ASIC); an insulating protective film formed on a surface of the ASIC; a substrate film formed on the insulating protective film; and a magnetic field detection element formed on the substrate film, the magnetic field detection element including two magnetic wires on the substrate film, a detection coil surrounding the two magnetic wires, two electrodes coupled to the two magnetic wires for wire energization, and two electrodes coupled to the coil for coil voltage detection.

A magnetic currency verification head may include a magnetoresistive sensor chip, and a magnetic bias unit disposed on the side of the magnetoresistive sensor chip away from the detection surface of the magnetic currency verification head, and separated from the magnetoresistive sensor chip; the magnetoresistive sensor chip comprises a gradiometric bridge circuit that includes magnetic sensor elements; the sensitive direction of the magnetic sensor elements is parallel to the detection surface of the magnetic currency verification head; and the magnetic bias unit has a recessed magnetic structure configured such that the magnetic field generated by the magnetic bias unit only has a small magnetic field component in the direction parallel to the detection surface, thereby enabling the magnetic sensor elements to operate in their linear range. As a result, the magnetic currency verification head has high sensitivity and signal-to-noise ratio.

A magnetic sensor comprises a magnetic material portion; an excitation portion; and a magnetic detection portion, the magnetic sensor detecting a magnetic field by the magnetic detection portion detecting a detection magnetic field generated due to magnetic moments of the magnetic material portion. The excitation portion is configured to include a conductive material formed into an elongated shape, the magnetic material portion is a soft magnetic film formed on a surface of the conductive material, and the magnetic moments of the magnetic material portion are oriented along circumferential directions of the conductive material orthogonal to a longitudinal direction of the conductive material such that the magnetic moments directed to one of the circumferential directions and the magnetic moments direction in another circumferential direction opposite to the one circumferential direction are distributed in substantially equal amounts.

An angle sensor comprising: a plurality of magnetic field sensing elements configured to detect a magnetic field and generate a respective plurality of analog magnetic field signals; a plurality of analog frontend circuits each analog frontend circuit associated with a respective magnetic field sensing element; and a digital feedback circuit configured to generate digital magnetic field signals from the plurality of analog magnetic field signals and generate digital error correction values, wherein the plurality of analog frontend circuits are configured to obtain the digital error correction values from the digital feedback circuit, generate analog correction values from the digital error correction values, and apply the analog correction values to the plurality of analog magnetic field signals to generate a plurality of corrected analog magnetic field signals.

The problem to be overcome by the present disclosure is to reduce harmonic components included in output signals. A magnetic sensor includes a detecting magnetoresistance element and a canceling magnetoresistance element. A tilt angle formed by a magnetic sensing direction of the canceling magnetoresistance element with respect to a magnetic sensing direction of the detecting magnetoresistance element falls within a predetermined range. The predetermined range is defined by reference to either n×α/3 or n×α/3+α/2, where α is an angle of rotation of a rotator corresponding to one cycle of a fundamental harmonic included in output signals of the detecting magnetoresistance element and n is a natural number equal to or greater than 1.

A magneto-resistive angle sensor system for measuring a rotational angle of a rotating component in an out-of-shaft configuration. The magneto-resistive angle sensor system including a magnet, which is attached to the rotating component. The magneto-resistive angle sensor system further including a magneto resistive sensor. A sensitive plane of the magneto-resistive sensor is positioned with an offset to the center of the magnet in an offset direction.