Abstract:
PROBLEM TO BE SOLVED: To provide a current sensor which requires only a small space and can be manufactured at low cost.SOLUTION: A current sensor 1 includes: a flat plastic housing 7 including an under surface 8, a top surface 9, an electric terminal 10, and a current conductor 11 through which a current to be measured flows; and a semiconductor chip 4 including two magnetic field sensors 5. Magnetic field elements at the positions of the two magnetic field sensors 5, which are detected by the two magnetic field sensors 5, indicate opposite directions. The semiconductor chip 4 is connected with the electric terminal 10 via a wire or by using a flip-chip structure. The current conductor 11 extends from one sidewall of the housing 7 to an opposing sidewall, and is flatly embedded in the under surface 8 of the housing 7, thereby being exposed on the under surface 8 of the housing 7. Surfaces of the semiconductor chip 4 and current conductor 11 which oppose each other are isolated from each other by an electric insulating layer 15.
Abstract:
PROBLEM TO BE SOLVED: To provide a linear output signal in a comparatively large operating range of typically 20-60 mm. SOLUTION: A magnetic structure 1 for detecting relative motion between itself and a magnetic field sensor 2 comprises at least two permanent magnets 3, 4. The permanent magnets are arranged along a predetermined line which, for example, is a straight or circular line at a predetermined distance g from each other. The permanent magnets are magnetized in the direction of the line so that the adjacent permanent magnets have an opposite direction of magnetization. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
Aufgabe ist die Bereitstellung einer Verschiebungsdetektionseinrichtung, bei welcher der Einfluss einer Temperaturabhängigkeitscharakteristik eines magnetischen Detektionselements unterdrückt und die Empfindlichkeit für ein Messobjekt erhöht wird. Die Verschiebungsdetektionseinrichtung weist ein Paar Magnete (4), die in einem Abstand voneinander angeordnet sind und in diesem Abstand ein Magnetfeld bilden, einen weichmagnetischen Körper (3), der zwischen dem Paar Magnete (4) angeordnet ist und sich bei Verbindung mit einem Messobjekt (5) verschiebt, und einen Sensor (2) auf, der zwischen dem Paar Magnete (4) angeordnet ist und eine Veränderung des Magnetfelds auf Grundlage der Verschiebung des weichmagnetischen Körpers (3) erfasst, wobei der weichmagnetische Körper (3) sich in einem Bereich verschiebt, der in einer Detektionsrichtung eine Verschiebungsposition umfasst, an der die vom Sensor (2) erfasste magnetische Flussdichte 0 ist.
Abstract:
To provide a displacement detection device that detects a displacement of a measuring object housed in a casing without changing the design of the casing or while suppressing the design change of the casing.A displacement detection device includes a pair of magnets arranged outside an injector body housing a needle with a space between the magnets and forming a magnetic field in the space, a soft magnetic material connected to the needle inside the injector body and displaced in accordance with the displacement of the needle and disposed in the magnetic field formed by the pair of magnets, and a sensor disposed outside the injector body and in the magnetic field formed by the pair of magnets, and detecting a change in magnetic flux density in accordance with the displacement of the soft magnetic material.
Abstract:
To provide a displacement detection device that detects a displacement of a measuring object housed in a casing without changing the design of the casing or while suppressing the design change of the casing.A displacement detection device includes a pair of magnets arranged outside an injector body housing a needle with a space between the magnets and forming a magnetic field in the space, a soft magnetic material connected to the needle inside the injector body and displaced in accordance with the displacement of the needle and disposed in the magnetic field formed by the pair of magnets, and a sensor disposed outside the injector body and in the magnetic field formed by the pair of magnets, and detecting a change in magnetic flux density in accordance with the displacement of the soft magnetic material.
Abstract:
To provide a rotation detection device that has a miniaturized sensor IC in comparison with a prior art.A rotation detection device includes: a magnet that forms a magnetic field toward a tooth surface of a gear; and a sensor disposed between the magnet and the gear, the sensor including: at least a pair of magnetic detection elements x1 and x2 that outputs signals according to a magnetic flux density in a radial direction of the gear; and a magnetic concentrator that induces, in the radial direction of the gear, a component in a circumferential direction of the gear in the magnetic flux density on detection surfaces of the magnetic detection elements x1 and x2, the sensor detecting a variation in a magnetic flux density accompanying the rotation of the gear.
Abstract:
To provide a displacement detection device and a continuously variable transmission that directly detect the position of the movable sheave. A displacement detection device includes a magnet that forms a magnetic field, a movable sheave that is rotated in a rotational direction and displaced in a direction perpendicular to the rotational direction and that is a measuring object having a concave portion (or a protrusion) on the circumferential surface, and a sensor disposed between the magnet and the circumferential surface of the movable sheave and detecting a change in magnetic flux density due to the displacement of the movable sheave in the magnetic field formed by the magnet and induced to the concave portion (or the protrusion).
Abstract:
To provide a rotation detection device that has a miniaturized sensor IC in comparison with a prior art.A rotation detection device includes: a magnet that forms a magnetic field toward a tooth surface of a gear; and a sensor disposed between the magnet and the gear, the sensor including: at least a pair of magnetic detection elements x1 and x2 that outputs signals according to a magnetic flux density in a radial direction of the gear; and a magnetic concentrator that induces, in the radial direction of the gear, a component in a circumferential direction of the gear in the magnetic flux density on detection surfaces of the magnetic detection elements x1 and x2, the sensor detecting a variation in a magnetic flux density accompanying the rotation of the gear.
Abstract:
Magnetic sensor system comprising: an integrated circuit comprising a semiconductor substrate, the semiconductor substrate comprises a plurality of magnetic sensors configured for measuring at least two first magnetic field components (Bx1, Bx2) oriented in a first direction (X), and for measuring at least two second magnetic field components (Bz1, Bz2) oriented in a second direction (Y; Z); a permanent magnet movable relative to the integrated circuit and configured for generating a magnetic field; a processing circuit configured for determining at least two physical quantities (Fx, Fy, Fz) related to a position of the magnet, using a predefined algorithm based on the measured first and second magnetic field components (Bx1, Bx2; Bz1, Bz2) or values derived therefrom, as inputs, and that uses a plurality of at least eight constants which are determined using machine learning. A force sensor system. A joystick or thumbstick system. A method.