Patents Assigned to Aichi Steel Corporation
  • Publication number: 20200088902
    Abstract: In a marker detection method for detecting magnetic markers (10) laid in a road by sensor units (11) attached to a vehicle (5), in a marker detection system (1) including two sensor units (11) arranged so as to be separated in a longitudinal direction of the vehicle (5) and two magnetic markers (10) arranged at spacings equal thereto so as to be simultaneously detectable by the two sensor units (11), magnetism generation sources simultaneously detected by the two sensor units (11) are detected as the magnetic markers (10), thereby reducing erroneous detection.
    Type: Application
    Filed: March 23, 2018
    Publication date: March 19, 2020
    Applicant: AICHI STEEL CORPORATION
    Inventors: Michiharu YAMAMOTO, Tomohiko NAGAO, Hitoshi AOYAMA
  • Patent number: 10591637
    Abstract: A ball rotational direction detecting system includes a magnetic sensor that is fixed in a ball, an acceleration sensor, a bearing recording unit that records a moving bearing, a magnetic dip recording unit that records a magnetic dip ? of geomagnetism, and a calculating unit. The calculating unit calculates the orientation of the rotation axis and the rotational direction of the ball with respect to a traveling direction F and a gravity direction G of the ball, based on a geomagnetism vector m, an acceleration vector a, the moving bearing, the magnetic dip ?, and time variations in the geomagnetism vector m or the acceleration vector a.
    Type: Grant
    Filed: November 3, 2016
    Date of Patent: March 17, 2020
    Assignee: AICHI STEEL CORPORATION
    Inventor: Michiharu Yamamoto
  • Patent number: 10539701
    Abstract: A minute magnetic body detecting sensor includes: a magnetic impedance element, with two magneto-sensitive bodies disposed in substantially two-dimensional directions such that an angle formed by respective sensitive axes is substantially 90 degrees; and a signal processing device, including a signal processing circuit, processing and amplifying damped oscillating voltages output by the two magneto-sensitive bodies that detected a local magnetic field due to a minute magnetic body that is a foreign substance, two square operating elements, squaring output signals, an adder, adding the squared signals, and a square root operating element, performing square root computation on the addition output and outputting a square root output, and enables high-precision detection of existence or non-existence of a minute magnetic body without detection overlooking.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: January 21, 2020
    Assignee: AICHI STEEL CORPORATION
    Inventors: Takeshi Kawano, Hideo Arakawa, Michiharu Yamamoto, Hitoshi Aoyama, Kazuo Urakawa
  • Publication number: 20200012294
    Abstract: In an installation method for laying magnetic markers (10) in a road for driving assist control on a vehicle side, a laying work vehicle (2) sequentially lays the magnetic markers (10) while moving along the road without performing a prior survey or the like of laying positions, and then by using a positioning work vehicle (3) including a magnetic sensor capable of detecting magnetism, the laid magnetic markers (10) are detected and the laying positions are identified to generate position data regarding the magnetic markers (10), thereby allowing reduction of cost of laying the magnetic markers (10).
    Type: Application
    Filed: March 23, 2018
    Publication date: January 9, 2020
    Applicant: AICHI STEEL CORPORATION
    Inventors: Michiharu YAMAMOTO, Tomohiko NAGAO, Hitoshi AOYAMA
  • Patent number: 10509080
    Abstract: (Subject) To provide a differential magnetic sensor capable of accurate magnetic detection of a local weak magnetic field even when there is a difference in detection sensitivity of a plurality of magnetic sensors used as a differential type magnetic sensor.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: December 17, 2019
    Assignee: AICHI STEEL CORPORATION
    Inventors: Takeshi Kawano, Hitoshi Aoyama, Michiharu Yamamoto, Hideo Arakawa
  • Patent number: 10509081
    Abstract: A magneto-sensitive wire for a magnetic impedance sensor and a method of manufacturing the same are provided which can prevent generation of abnormal noise in an output voltage and deterioration in hysteresis characteristics and enable higher-accuracy measurement than conventional magneto-sensitive wires. The magneto-sensitive wire (1) comprises an amorphous wire for detecting magnetism. The magnetic impedance sensor (6) has the magneto-sensitive wire (1) and a detection coil (3) around the magneto-sensitive wire (1). The magnetic impedance sensor (6) is configured to apply a pulse current to the magneto-sensitive wire (1) and detect a voltage generated in the detection coil (3) thereby capable of measuring strength of a magnetic field. The voltage has magnitude in response to strength of an external magnetic field. The magneto-sensitive wire (1) is a Co-based amorphous wire manufactured using an in-rotating liquid spinning method and finished by wire drawing.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: December 17, 2019
    Assignee: AICHI STEEL CORPORATION
    Inventors: Norihiko Hamada, Akihiro Shimode, Michiharu Yamamoto
  • Patent number: 10454353
    Abstract: An apparatus for manufacturing an interior permanent magnet-type inner rotor and manufacturing method using the same. The apparatus including: a mold having a three-layer structure; the method including a shrink fitting step of heating a rotor core having slots; and a filling step of filling the rotor core slots in a residual heat state after the shrink fitting step with a flowable mixture of a binder resin heated to a flowable state and having anisotropic magnet particles, in oriented magnetic fields. This allows, in similar manufacturing steps, an inner rotor of which magnetic poles are anisotropic bond magnets formed by solidifying the flowable mixture in the slots and a conventional inner rotor of which the magnetic poles are sintered magnets. This allows both the inner rotors concurrently and in parallel (mixed flow production) in an already existing IPM motor manufacturing line.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: October 22, 2019
    Assignee: AICHI STEEL CORPORATION
    Inventors: Tadashi Fujimaki, Hiroshi Matsuoka, Yoji Hashimoto
  • Patent number: 10418175
    Abstract: Apparatus for aligning magnetic wire aligns magnetic wires on a wire alignment substrate along its base lines, which are positions the magnetic wires are aligned with, with a small interval and without inducing torsional stresses. A microscope is used to detect misplacement between the base line and a reference line that is the magnetic wire taking a form of a straight line under application of tensile force and pulled out by a wire chuck. The misplacement is corrected using a position adjustment device of a substrate attaching base to which the wire alignment substrate is attached. The magnetic wires are temporarily fixed to the wire alignment substrate by magnetic power, and then permanently fixed to the wire alignment substrate using resin while free from the torsional stresses.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: September 17, 2019
    Assignee: AICHI STEEL CORPORATION
    Inventor: Katsuhiko Nishihata
  • Patent number: 10418176
    Abstract: Apparatus for aligning magnetic wire aligns magnetic wires on a wire alignment substrate along its base lines, which are positions the magnetic wires are aligned with, with a small interval and without inducing torsional stresses. A microscope is used to detect misplacement between the base line and a reference line that is the magnetic wire taking a form of a straight line under application of tensile force and pulled out by a wire chuck. The misplacement is corrected using a position adjustment device of a substrate attaching base to which the wire alignment substrate is attached. The magnetic wires are temporarily fixed to the wire alignment substrate by magnetic power, and then permanently fixed to the wire alignment substrate using resin while free from the torsional stresses.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: September 17, 2019
    Assignee: AICHI STEEL CORPORATION
    Inventor: Katsuhiko Nishihata
  • Publication number: 20190280576
    Abstract: A manufacturing method for obtaining an interior permanent magnet-type inner rotor without thermal demagnetization due to shrink fitting to a rotating shaft includes: a shrink fitting step of heating a rotor core having slots and inserting a rotating shaft into a shaft hole to shrinkfit the rotor core; and a filling step of filling the rotor core slots in a residual heat state after the shrink fitting step with a flowable mixture of a binder resin heated to a flowable state and anisotropic magnet particles, in oriented magnetic fields This allows, in similar manufacturing steps, an inner rotor of which the magnetic poles are anisotropic bond magnets formed by solidifying the flowable mixture in the slots and a conventional inner rotor of which the magnetic poles are sintered magnets. This allows both the inner rotors concurrently and in parallel (mixed flow production) in an already existing IPM motor manufacturing line.
    Type: Application
    Filed: May 24, 2019
    Publication date: September 12, 2019
    Applicant: AICHI STEEL CORPORATION
    Inventors: Tadashi FUJIMAKI, Hiroshi MATSUOKA, Yoji HASHIMOTO
  • Publication number: 20190212169
    Abstract: A learning system (1) for vehicles for learning a neutral point of a measurement sensor equipped in a vehicle by using a magnetic marker disposed in a traveling road includes a sensor unit (11) which detects the magnetic marker and measures a lateral shift amount of the vehicle with respect to the magnetic marker, a route information acquiring part which acquires route information indicating a shape of the traveling road, and a learning determination part which determines whether a learning condition as a condition for performing learning of the neutral point of the measurement sensor is satisfied, wherein a fluctuation range of a lateral shift amount measured by the sensor unit (11) when the vehicle is traveling a learning road as a traveling road in a constant shape is equal to or smaller than a predetermined threshold is set at least as the learning condition.
    Type: Application
    Filed: August 24, 2017
    Publication date: July 11, 2019
    Applicant: AICHI STEEL CORPORATION
    Inventors: Michiharu YAMAMOTO, Tomohiko NAGAO, Hitoshi AOYAMA
  • Publication number: 20190194886
    Abstract: A magnetic marker (1), laid in or on a road so as be detectable by a magnetic sensor (2) attached to a bottom surface side of a vehicle (5), that is used for vehicle-side drive assist control for assisting driving is an isotropic ferrite plastic magnet, molded into a columnar shape, that contains a magnetic powder of iron oxide, i.e. a powder of a magnetic material, dispersed in a polymer material. In a marker system (1S) including this magnetic marker (1), magnetic markers (1) accommodated in holes (530) bored in a road surface (53) are arranged along the center of a lane.
    Type: Application
    Filed: June 13, 2017
    Publication date: June 27, 2019
    Applicant: Aichi Steel Corporation
    Inventors: Michiharu YAMAMOTO, Tomohiko NAGAO, Hitoshi AOYAMA
  • Publication number: 20190196496
    Abstract: A vehicular system (1) includes a lateral shift amount measurement part that has a plurality of magnetic sensors that senses magnetism of magnetic markers (10) arrayed along a vehicle width direction and measures a lateral shift amount that is a positional deviation of a vehicle (5) in a vehicle width direction with respect to the magnetic markers (10) and a course estimation part that uses a difference between the lateral shift amounts with respect to two magnetic markers (10) disposed with a space provided therebetween in a road surface (100S) where the vehicle (5) travels and estimates a deviation of the vehicle (5) in a traveling direction with respect to a line segment direction connecting the positions of the two magnetic markers.
    Type: Application
    Filed: August 24, 2017
    Publication date: June 27, 2019
    Applicant: AICHI STEEL CORPORATION
    Inventors: Michiharu YAMAMOTO, Tomohiko NAGAO, Hitoshi AOYAMA
  • Publication number: 20190155305
    Abstract: Provided is a driving assistance system using a magnetic marker capable of providing more pieces of information. In the driving assistance system for assisting driving of a vehicle, a magnetic marker (1) including a magnet sheet (11) serving as a magnetism generating unit which generates a magnetic field and also an RFID tag (15) as an information providing unit which provides information to a vehicle side is laid on a travelling road of the vehicle, and the vehicle includes a magnetic sensor serving as a magnetism detecting unit which magnetically detects the magnetic marker (1) and also a tag reader as an information acquiring unit which acquires the information provided by the RFID tag (15) included in the magnetic marker (1).
    Type: Application
    Filed: March 30, 2017
    Publication date: May 23, 2019
    Applicant: Aichi Steel Corporation
    Inventors: Michiharu YAMAMOTO, Tomohiko Nagao, Hitoshi Aoyama
  • Publication number: 20190137536
    Abstract: Provided is a rotary machine in which the output of a magnetic sensor is hardly lowered even if the rotation speed of a rotor becomes high. The rotary machine includes a rotor, a housing, a magnet, and a magnetic sensor. The rotor axially rotates around a rotation axis. The housing is formed of a conductive material and contains the rotor. The magnet is attached to the rotor such that an arrangement direction of a pair of magnetic poles is in a radial direction of the rotor. The magnetic sensor is attached to the housing. The magnetic sensor detects a time variation of a magnetic field generated from the magnet to detect the rotation speed of the rotor. The magnetic sensor is located on the outside than the magnet in the radial direction. The magnetism sensing direction of the magnetic sensor is orthogonal to the radial direction.
    Type: Application
    Filed: May 31, 2017
    Publication date: May 9, 2019
    Applicant: AICHI STEEL CORPORATION
    Inventors: Michiharu YAMAMOTO, Tomohiko NAGAO, Takeshi KAWANO, Koei GEMBA
  • Patent number: 10253392
    Abstract: Apparatus for heat treating magnetic wire includes a wire supply unit, a wire property measuring unit, a wire tensile force measuring unit, a heat treatment unit, and a wire winding unit. The wire supply unit includes a supply bobbin, a supply rotary part, a wire reel, and a tension roller. The wire property measuring unit includes a size measuring device, an after measurement capstan, and a wire reel and measures a size of the wire prior to the heat treatment. The wire tensile force measuring unit includes a tensile force measuring device, a tension roller, and a wire reel. The wire heat treatment unit includes a heat treatment furnace, a temperature measuring device, an after heat treatment capstan, and a wire reel. The wire winding unit includes a winding bobbin, a winding rotary part that rotates the winding bobbin, a tension roller, and a wire reel.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: April 9, 2019
    Assignee: AICHI STEEL CORPORATION
    Inventors: Norihiko Hamada, Akihiro Shimode
  • Patent number: 10253393
    Abstract: Method for heat treating magnetic wire includes a wire supply unit, a wire property measuring unit, a wire tensile force measuring unit, a heat treatment unit, and a wire winding unit. The wire supply unit includes a supply bobbin, a supply rotary part, a wire reel, and a tension roller. The wire property measuring unit includes a size measuring device, an after measurement capstan, and a wire reel and measures a size of the wire prior to the heat treatment. The wire tensile force measuring unit includes a tensile force measuring device, a tension roller, and a wire reel. The wire heat treatment unit includes a heat treatment furnace, a temperature measuring device, an after heat treatment capstan, and a wire reel. The wire winding unit includes a winding bobbin, a winding rotary part that rotates the winding bobbin, a tension roller, and a wire reel.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: April 9, 2019
    Assignee: AICHI STEEL CORPORATION
    Inventors: Norihiko Hamada, Akihiro Shimode
  • Publication number: 20190098468
    Abstract: Provided is a driving assistance system capable of providing more pieces of information to a vehicle side by using magnetic markers. A driving assistance system (1A) is a system including magnetic markers (1) laid on a travelling road so as to be magnetically detectable and also be able to provide code information to a vehicle side, a vehicle (5) configured to be able to magnetically detect the magnetic markers (1) and also read the code information, and a base station (6) configured to make a reply with corresponding information when receiving the code information from the vehicle (5) reading the code information.
    Type: Application
    Filed: March 30, 2017
    Publication date: March 28, 2019
    Applicant: Aichi Steel Corporation
    Inventors: Michiharu Yamamoto, Tomohiko Nagao, Hitoshi Aoyama
  • Publication number: 20190051457
    Abstract: Apparatus for aligning magnetic wire aligns magnetic wires on a wire alignment substrate along its base lines, which are positions the magnetic wires are aligned with, with a small interval and without inducing torsional stresses. A microscope is used to detect misplacement between the base line and a reference line that is the magnetic wire taking a form of a straight line under application of tensile force and pulled out by a wire chuck. The misplacement is corrected using a position adjustment device of a substrate attaching base to which the wire alignment substrate is attached. The magnetic wires are temporarily fixed to the wire alignment substrate by magnetic power, and then permanently fixed to the wire alignment substrate using resin while free from the torsional stresses.
    Type: Application
    Filed: November 7, 2017
    Publication date: February 14, 2019
    Applicant: AICHI STEEL CORPORATION
    Inventor: Katsuhiko NISHIHATA
  • Publication number: 20190051456
    Abstract: Apparatus for aligning magnetic wire aligns magnetic wires on a wire alignment substrate along its base lines, which are positions the magnetic wires are aligned with, with a small interval and without inducing torsional stresses. A microscope is used to detect misplacement between the base line and a reference line that is the magnetic wire taking a form of a straight line under application of tensile force and pulled out by a wire chuck. The misplacement is corrected using a position adjustment device of a substrate attaching base to which the wire alignment substrate is attached. The magnetic wires are temporarily fixed to the wire alignment substrate by magnetic power, and then permanently fixed to the wire alignment substrate using resin while free from the torsional stresses.
    Type: Application
    Filed: August 10, 2017
    Publication date: February 14, 2019
    Applicant: AICHI STEEL CORPORATION
    Inventor: Katsuhiko NISHIHATA