Abstract: A position sensor is provided that can detect a position along a long stroke and that can limit an increase in size.

Abstract: A position sensor is provided that can detect a position along a long stroke and that can limit an increase in size.

Abstract: A magnetic sensor includes a bias magnetic field generator and a magnetic detection element disposed on one side of the bias magnetic field generator, in a magnetic pole direction. The magnetic sensor identifies a medium, that is a magnetic powder adhered medium or a magnetic film adhered medium, passing across the magnetic detection element on the side opposite to the bias magnetic field generator. The magnetic detection element detects variation in a magnetic field component parallel to a movement direction of the medium identified. A passage region of the medium includes a specific region in which a magnetic field increases when distance from the magnetic detection element becomes larger in the magnetic pole direction.

Abstract: Magnetic members are arranged along a straight line and can be placed face-to-face with spin-valve magnetoresistive elements. The magnetic pole faces of the magnetic members which can be face-to-face with the spin-valve magnetoresistive elements have different magnetic polarities from the magnetic pole faces of neighboring magnetic members. The magnetic members are arranged at a uniform pitch. Each magnetic member is spaced from neighboring magnetic members. X/P is from 40% to 60%, where X is length of each magnetic member along an arrangement direction of the magnetic members, and P is pitch of the magnetic members along the arrangement direction.

Abstract: An angle detecting apparatus includes a rotor fixed to a rotating shaft, a pair of magnetic sensors arranged close to the outer periphery of the rotor so as to have a difference in angle (?/2) with respect to the center of rotation of the rotor, a differential operational circuit performing differential operation on detection signals output by the magnetic sensors to output a differential signal, and the angle calculating circuit calculating the angle of rotation of the rotating shaft based on the differential signal. The planar shape of the rotor is such that the sum of the distances between the center of rotation and the respective two points where two straight lines crossing at the center of rotation at a crossing angle of (?/2) cross the outer periphery of the rotor is constant, and the planar shape is symmetric with respect to a straight line passing through the center of rotation.

Abstract: An angle detecting apparatus includes a rotor fixed to a rotating shaft, a pair of magnetic sensors arranged opposite each other so as to output a first detection signal and a second detection signal, respectively, each of which contains information on the angle of rotation of the rotor, a differential operational circuit performing differential operation on the first detection signal and the second detection signal, and an angle calculating circuit calculating the angle of rotation of the rotating shaft based on the result of the differential operation by the differential operational circuit. Here, the distance between two points where a straight line passing through the center of rotation of the rotor crosses the outer periphery of the rotor is constant.

Abstract: Magnetic members are arranged along a straight line and can be placed face-to-face with spin-valve magnetoresistive elements. The magnetic pole faces of the magnetic members which can be face-to-face with the spin-valve magnetoresistive elements have different magnetic polarities from the magnetic pole faces of neighboring magnetic members. The magnetic members are arranged at a uniform pitch. Each magnetic member is spaced from neighboring magnetic members. X/P is from 40% to 60%, where X is length of each magnetic member along an arrangement direction of the magnetic members, and P is pitch of the magnetic members along the arrangement direction.

Abstract: An angle detecting apparatus includes a rotor fixed to a rotating shaft, a pair of magnetic sensors arranged close to the outer periphery of the rotor so as to have a difference in angle (?/2) with respect to the center of rotation of the rotor, a differential operational circuit performing differential operation on detection signals output by the magnetic sensors to output a differential signal, and the angle calculating circuit calculating the angle of rotation of the rotating shaft based on the differential signal. The planar shape of the rotor is such that the sum of the distances between the center of rotation and the respective two points where two straight lines crossing at the center of rotation at a crossing angle of (?/2) cross the outer periphery of the rotor is constant, and the planar shape is symmetric with respect to a straight line passing through the center of rotation.

Abstract: An angle detecting apparatus includes a rotor fixed to a rotating shaft, a pair of magnetic sensors arranged opposite each other so as to output a first detection signal and a second detection signal, respectively, each of which contains information on the angle of rotation of the rotor, a differential operational circuit performing differential operation on the first detection signal and the second detection signal, and an angle calculating circuit calculating the angle of rotation of the rotating shaft based on the result of the differential operation by the differential operational circuit. Here, the distance between two points where a straight line passing through the center of rotation of the rotor crosses the outer periphery of the rotor is constant.

Abstract: A moving body detecting apparatus including at least a gear 1 as a magnetic moving body including at least one of a projected portion or a recessed portion, a bias magnet 5 for applying a bias magnetic field thereto, and two pairs of spin valve type giant magneto resistive elements R1, R2 and R3, R4, in which the moving body detecting apparatus is arranged such that magnetizing directions of pinned layers of the paired spin valve type giant magneto resistive elements are directed to direct substantially in a forward direction and substantially in an opposite direction relative to the direction of moving the gear 1, for example, linearly.

Abstract: A moving object detection device has a magnetic sensor element, a permanent magnet for applying a magnetic field to the magnetic sensor element; a board on which electronic parts are mounted, a holder; and a case. The holder has an integral approximately box-shaped support part to hold the magnet and the board, and the holder is inserted into the case so that the magnetic sensor element, the permanent magnet, and the board are contained in the case. The holder and the case are fitted and fastened to each other by concave-convex-shaped elements.

Abstract: A moving body detecting apparatus including at least a gear 1 as a magnetic moving body including at least one of a projected portion or a recessed portion, a bias magnet 5 for applying a bias magnetic field thereto, and two pairs of spin valve type giant magneto resistive elements R1, R2 and R3, R4, in which the moving body detecting apparatus is arranged such that magnetizing directions of pinned layers of the paired spin valve type giant magneto resistive elements are directed to direct substantially in a forward direction and substantially in an opposite direction relative to the direction of moving the gear 1, for example, linearly.

Abstract: A moving object detection device has a magnetic sensor element, a permanent magnet for applying a magnetic field to the magnetic sensor element; a board on which electronic parts are mounted, a holder; and a case. The holder has an integral approximately box-shaped support part to hold the magnet and the board, and the holder is inserted into the case so that the magnetic sensor element, the permanent magnet, and the board are contained in the case. The holder and the case are fitted and fastened to each other by concave-convex-shaped elements.