| Aichi Steel Corporation Patent applications |
| Patent application number | Title | Published |
|---|
| 20120038358 | ULTRA-SENSITIVE MAGNETOIMPEDANCE SENSOR - Provided is a magnetoimpedance (MI) sensor having a high magnetic sensor sensitivity and a wide measurement range. The MI sensor comprises an MI element, an electric current supply unit and a signal processing circuit. The MI element comprises a magnetosensitive wire formed of an amorphous soft magnetic alloy having zero magnetostriction, and a detection coil provided around the magnetosensitive wire with an electric insulator disposed therebetween, thereby detecting voltage generated at the detection coil and corresponding to an external magnetic field upon application of a high frequency electric current to the magnetosensitive wire. The electric current supply unit supplies the high frequency electric current to the MI element. The signal processing circuit processes an output signal from the detection coil. In this MI sensor, the magnetosensitive wire has at least a surface layer in which spins are aligned in a circumferential direction of the wire, and the high frequency electric current has a frequency in the range of 0.3 to 1.0 GHz inclusive. | 02-16-2012 |
| 20120013332 | MAGNETIC DETECTION DEVICE - A magnetic detection device of the present invention includes at least one pair of first magnetosensitive bodies each comprising a soft magnetic material extending in a first axis direction and being sensitive to an external magnetic field oriented in the first axis direction; and a magnetic field direction changer comprising a soft magnetic material and changing an external magnetic field oriented in a different axis direction from the first axis direction into a measurement magnetic field having a component in the first axis direction which can be detected by the at least one pair of first magnetosensitive bodies. With this magnetic detection device, the external magnetic field oriented in the different axis direction can be detected by way of the first magnetosensitive bodies. As a result, while attaining magnetic detection with high accuracy, the magnetic detection device can be reduced in size or thickness by omitting a magnetosensitive body extending long in the different axis direction. | 01-19-2012 |
| 20110291649 | MAGNETO-IMPEDANCE SENSOR ELEMENT AND METHOD FOR MANUFACTURING THE SAME - A magneto-impedance sensor element is formed in a planar type structure in which an amorphous wire is incorporated in a substrate. The magneto-impedance sensor element includes a nonmagnetic substrate, an amorphous wire arranged in an aligning direction of a planar pattern that forms a detecting coil, a spiral detecting coil formed of a planar pattern and a cubic pattern on an outer periphery of the amorphous wire, a planar insulating portion that insulates the planar pattern from the amorphous wire, a wire fixing portion to fix the amorphous wire on an upper surface of the planar insulating portion, and a cubic insulating portion that insulates the cubic pattern from the amorphous wire. | 12-01-2011 |
| 20110248591 | Anisotropic bonded magnet and direct current motor using the same - An anisotropic bonded magnet molded in a ring shape to be used to excite a brush-equipped direct current motor. A magnetic flux density distribution in each of magnetic pole sections of the ring shape forms an asymmetric distribution which includes a magnetic flux density reduced portion wherein the absolute value rises from a neutral axis opposite to a rotation direction of an armature with a delay with respect to a rotation direction of the armature, and in which the absolute value falls more rapidly than a rise thereof in the rotation direction of the armature with respect to a neutral axis in the rotation direction of the armature. | 10-13-2011 |
| 20110089512 | MAGNETO-IMPEDANCE SENSOR ELEMENT - A magneto-impedance sensor element 1 has a base body 2, a magnetic amorphous wire 3, a coating insulator 4, a detecting coil 5, a terminal base 6 having a terminal mounting surface 61, wire electrode terminals 11 and coil electrode terminals 12 formed on the terminal mounting surface 61, wire connecting wirings 110 for electrically connecting the wire electrode terminals 11 and a pair of wire conducting terminals 31 provided to the magnetic amorphous wire 3, and coil connecting wirings 120 for electrically connecting the coil electrode terminals 12 and a pair of coil conducting terminals 51 provided to the detecting coil 5. A normal of the terminal mounting surface 61 has a longitudinal direction component of the magnetic amorphous wire 3, and the terminal mounting surface 61 is arranged between both ends of the magnetic amorphous wire 3 in the longitudinal direction of the magnetic amorphous wire 3. | 04-21-2011 |
| 20110080164 | MAGNETO-SENSITIVE WIRE, MAGNETO-IMPEDANCE ELEMENT AND MAGNETO-IMPEDANCE SENSOR - The magneto-sensitive wire of the invention has a vortex-spin structure and hence includes no magnetic domain walls, so that the magneto-sensitive wire of the invention has an excellent hysteresis characteristic exhibiting nearly zero hysteresis. Therefore, the linearity related to the output voltage characteristic for the applied magnetic field in the determination range of an MI sensor is significantly improved as compared to MI sensors using the conventional magneto-sensitive wires. Using the magneto-sensitive wire of the invention makes it possible to provide a magneto-impedance (MI) element exhibiting a higher precision than the conventional ones and further provide a sensor using such an MI element. | 04-07-2011 |
| 20100065156 | Method for producing rare earth anisotropic bond magnets, method for orientation processing of magnetic molded bodies, and in-magnetic filed molding apparatus - The present invention relates to a method for producing a rare earth anisotropic bond magnet containing a hollow cylindrically shaped magnetic molded body having, at the hollow cylindrically shaped side face thereof, at least 4 or more orientation portions that are oriented with semi-radial distribution by compression molding of a magnetic material after thermally orienting step, wherein intermediate aligning magnetic fields applied in the thermally orienting step to between adjacent cavities are the mostly same in their magnetic directions. A plurality of rare earth anisotropic bond magnets can be efficiently produced at one time. | 03-18-2010 |
| 20090146518 | Anisotropic bonded magnet for use in a 4-pole motor, a motor employing that magnet, and an alignment process apparatus for the anisotropic bonded magnet for use in a 4-pole motor - A hollow cylindrically shaped anisotropic bonded magnet for use in a 4-pole motor, is formed by molding anisotropic rare-earth magnet powder with resin. The alignment distribution of the anisotropic rare-earth magnet powder in a cross section perpendicular to the axis of the anisotropic bonded magnet is in the normalized direction of the cylindrical side of the hollow cylindrical shape in the main region of a polar period, and in a transition region in which the direction of the magnetic pole changes, steadily points towards a direction tangential to the periphery of the cylindrical side at points closer to the neutral point of the magnetic pole, and becomes a direction tangential to the periphery of the cylindrical side at that neutral point, and steadily points toward the normalized direction of the cylindrical side at points farther away from the neutral point. | 06-11-2009 |
