Patents Assigned to Aichi Steel Corporation
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Publication number: 20210150905Abstract: A marker detection method in which a magnetic detection unit (11) of a vehicle side that includes a plurality of magnetic sensors arranged in a vehicle width direction is used to detect magnetic markers (10) that are laid in a road, the method executes detection of a center position in the vehicle width direction of a magnetic distribution that acts on the magnetic detection unit (11) and processing of an index representing a degree of a positional change of the center position when a vehicle (5) passes over the magnetic markers (10) to determine a possibility of the presence of magnetic generation sources that causes disturbance, thereby suppressing erroneous detection of the magnetic markers (10).Type: ApplicationFiled: June 7, 2018Publication date: May 20, 2021Applicant: AICHI STEEL CORPORATIONInventors: Michiharu YAMAMOTO, Tomohiko NAGAO, Hitoshi AOYAMA
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Patent number: 10969245Abstract: Provided is a magnetic marker detection method with high detection reliability. The magnetic marker detection method for detecting a magnetic marker (10) laid on a road while a vehicle (5) having a plurality of, at least two or more, magnetic sensors attached thereto is travelling includes a gradient generating process of generating a first magnetic gradient, which is a difference between magnetic measurement values of two magnetic sensors and a filter processing process of generating a filter output value by performing filter processing by a high-pass filter as to a change of the first magnetic gradient in a travelling direction of the vehicle. The magnetic marker (10) is detected by an arithmetic operation process regarding the filter output value.Type: GrantFiled: October 17, 2016Date of Patent: April 6, 2021Assignee: AICHI STEEL CORPORATIONInventors: Michiharu Yamamoto, Tomohiko Nagao, Hitoshi Aoyama
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Patent number: 10968581Abstract: Provided are a magnetic marker and a magnetic marker detection system with a reduced magnetic force. The magnetic marker detection system (1S) in which magnetism generated from the magnetic marker (1) laid on a road surface (53) is detected by a magnetic sensor (2) attached to a vehicle's body floor (50) of a vehicle (5) is a system with the magnetic marker (1) and the magnetic sensor (2) in combination, the magnetic marker having a surface with a magnetic flux density equal to or smaller than 40 mT and the magnetic sensor using a magneto-impedance element including an amorphous wire as a magneto-sensitive body with impedance in a high-frequency region changing in accordance with an external magnetic field.Type: GrantFiled: October 17, 2016Date of Patent: April 6, 2021Assignee: AICHI STEEL CORPORATIONInventors: Michiharu Yamamoto, Tomohiko Nagao, Hitoshi Aoyama
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Patent number: 10961670Abstract: Provided are a magnetic marker and a magnetic marker detection system with a reduced magnetic force. The magnetic marker detection system (1S) in which magnetism generated from the magnetic marker (1) laid on a road surface (53) is detected by a magnetic sensor (2) attached to a vehicle's body floor (50) of a vehicle (5) is a system with the magnetic marker (1) and the magnetic sensor (2) in combination, the magnetic marker having a magnetism reach ratio Gh/Gs, which is a ratio of a magnetic flux density Gh at a position at a height of 250 mm with respect to a magnetic flux density Gs of a surface, being equal to or larger than 0.5% and the magnetic sensor using a magneto-impedance element including a magneto-sensitive body with impedance changing in accordance with an external magnetic field.Type: GrantFiled: October 17, 2016Date of Patent: March 30, 2021Assignee: AICHI STEEL CORPORATIONInventors: Michiharu Yamamoto, Tomohiko Nagao, Hitoshi Aoyama
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Patent number: 10948046Abstract: Provided is a CVT ring member having a nitrided layer on a surface thereof. The CVT ring member includes a chemical composition containing, by mass, C: 0.43 to 0.70%, Si: 2.50% or less, Mn: 1.00% or less, Cr: 1.50 to 4.00%, Mo: 0.50 to 3.00% and V: 1.00% or less while satisfying a relation of Formula 1: 159×C(%)+91×Si(%)+68×Cr(%)+198×Mo (%)+646?1,000, and the balance being Fe and unavoidable impurities. The ring member has a tensile strength of 1,700 MPa or more. The nitrided layer has a surface hardness of HV800 to HV950.Type: GrantFiled: December 9, 2014Date of Patent: March 16, 2021Assignees: Aichi Steel Corporation, Toyota Jidosha Kabushiki KaishaInventors: Takeshi Udagawa, Yukio Ito, Koji Nishida
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Patent number: 10900988Abstract: 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: GrantFiled: May 31, 2017Date of Patent: January 26, 2021Assignee: AICHI STEEL CORPORATIONInventors: Michiharu Yamamoto, Tomohiko Nagao, Takeshi Kawano, Koei Gemba
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Publication number: 20210013755Abstract: An electric motor for reducing eddy current loss including an armature; a field element or permanent magnet as a magnetic source; and a shaft rotating together with the armature or field element. The permanent includes magnet particles bound together by a binder resin, and has a degree of electric resistance anisotropy (?1/?2) of 2 or more. The first electric resistivity (?1) is measured in an axial direction and a second electric resistivity (?2) is measured in a direction perpendicular to the axial direction. The bonded magnet is, for example, a compression-molded bonded magnet that contains 93% to 98.5% of the magnet particles, and the first electric resistivity is 300 ??m or more. When the compression-molded bonded magnet whose compression direction is arranged along the axial direction is used as a field source, the eddy current loss occurring in the compression-molded bonded magnet can be efficiently reduced.Type: ApplicationFiled: March 26, 2019Publication date: January 14, 2021Applicant: AICHI STEEL CORPORATIONInventors: Atsushi NARITA, Aki WATARAI
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Patent number: 10884076Abstract: An electrical pulse current is supplied to an amorphous wire from a pulse generator, an alternate current voltage whose magnitude is in response to an external magnetic field induced at both ends of a detecting coil wound around the amorphous wire is generated, a positive direct current is applied from a positive power supply by superimposing to the amorphous wire as a bias current so as to produce a bias of magnetization within the amorphous wire and the occurrence of pulse noises is restrained, so as to make it possible to perform high-sensitivity magnetic field detection.Type: GrantFiled: February 23, 2016Date of Patent: January 5, 2021Assignee: AICHI STEEL CORPORATIONInventors: Takeshi Kawano, Hitoshi Aoyama, Michiharu Yamamoto, Hideo Arakawa
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Publication number: 20200354907Abstract: 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: ApplicationFiled: July 28, 2020Publication date: November 12, 2020Applicant: Aichi Steel CorporationInventors: Michiharu YAMAMOTO, Tomohiko NAGAO, Hitoshi AOYAMA
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Patent number: 10822677Abstract: A forged component having a chemical composition including, by mass %, C: 0.30 to 0.45%, Si: 0.05 to 0.35%, Mn: 0.50 to 0.90%, P: 0.030 to 0.070%, S: 0.040 to 0.070%, Cr: 0.01 to 0.50%, Al: 0.001 to 0.050%, V: 0.25 to 0.35%, Ca: 0 to 0.0100%, N: 0.0150% or less, and the balance being Fe and unavoidable impurities, and satisfying formula 1. Metal structure is a ferrite pearlite structure, and a ferrite area ratio is 30% or more. Vickers hardness is in the range of 320 to 380 HV. 0.2% yield strength is 800 MPa or more. A Charpy V-notch impact value is in the range of 7 to 15 J/cm2.Type: GrantFiled: March 18, 2014Date of Patent: November 3, 2020Assignees: AICHI STEEL CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeyuki Uenishi, Susumu Owaki, Hisanori Koma, Tomoyasu Kitano, Kazuhiro Tanahashi, Nobuyuki Shinohara
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Publication number: 20200332483Abstract: A work vehicle system configured of a plurality of work vehicles performing work relating to magnetic markers to be laid on a road surface so as to be detectable by a magnetic sensor attached to a bottom surface side of a vehicle in order to achieve vehicle-side control for assisting driving operation of the vehicle by a driver or automatic driving not relying on operation of the driver, including a target acquisition apparatus which acquires a control target for travelling along a laying line where the magnetic markers are to be laid, an automatic steering apparatus for achieving automatic steering by controlling a steering angle of a steering wheel based on the control target, and a work apparatus which takes charge of the work relating to the magnetic markers.Type: ApplicationFiled: February 13, 2017Publication date: October 22, 2020Applicant: AICHI STEEL CORPORATIONInventors: YAMAMOTO Michiharu, NAGAO Tomohiko, AOYAMA Hitoshi
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Patent number: 10801170Abstract: 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: GrantFiled: June 13, 2017Date of Patent: October 13, 2020Assignee: AICHI STEEL CORPORATIONInventors: Michiharu Yamamoto, Tomohiko Nagao, Hitoshi Aoyama
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Publication number: 20200320870Abstract: A position capture method for capturing an own vehicle position by using a positioning part that measures a position of a vehicle (4) and a plurality of magnetic markers (5) laid on a traveling path of the vehicle (4) with their laying positions specified includes: upon detection of any of the plurality of magnetic markers (5), selecting, from among the laying positions of the plurality of magnetic markers (5), the laying position located nearest to an actual measured position measured by the positioning part; and capturing, as the own vehicle position, a corrected position based on the laying position, thereby making high-accuracy position capture possible.Type: ApplicationFiled: May 30, 2017Publication date: October 8, 2020Applicants: Aichi Steel Corporation, Advanced Smart Mobility Co., Ltd.Inventors: Michiharu Yamamoto, Tomohiko Nagao, Hitoshi Aoyama, Keiji Aoki
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Publication number: 20200319270Abstract: A magneto-impedance sensor which makes it possible to further improve the accuracy of external magnetic field measurement includes a magneto-impedance element, a detection circuit, a magneto-sensitive body wiring line and a conductive layer wiring line. The magneto-impedance element includes a magneto-sensitive body and a conductive layer adjacent to the magneto-sensitive body. The magneto-sensitive body and the conductive layer pass a current therethrough in the opposite directions. The magneto-sensitive body wiring line and the conductive layer wiring line are electrically connected to the magneto-sensitive body and the conductive layer, respectively. A detection coil and a detection circuit of the magneto-impedance element are electrically connected to each other through detecting conductive wires. At least parts of these lines are adjacent to each other and allow a current to pass therethrough in opposite directions.Type: ApplicationFiled: May 31, 2017Publication date: October 8, 2020Applicant: AICHI STEEL CORPORATIONInventors: Michiharu YAMAMOTO, Tomohiko NAGAO, Yoshihiro IWANAGA
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Publication number: 20200303958Abstract: A wireless power-feeding apparatus that enables efficient wireless feeding to a power-receiving coil embedded at the center of a spherical power-receiving device. The apparatus includes: a holding member for holding the power-receiving device; a power-transmitting coil; a driver circuit for supplying the power-transmitting coil with high-frequency current to generate a magnetic flux for wireless power-feeding to the power-receiving coil; and a wireless data receiver for receiving data transmitted regularly from a wireless data transmitter, the power-transmitting coil being positioned relative to the holding member in such a manner that the axes of the power-receiving coil and the power-transmitting coil are parallel to each other when the power-receiving device is held by the holding member in such a manner that a mark provided on the surface of the power-receiving device faces a predetermined direction.Type: ApplicationFiled: January 29, 2019Publication date: September 24, 2020Applicants: MAXELL HOLDINGS, LTD., MIZUNO CORPORATION, AICHI STEEL CORPORATION, SUNWISE CO., LTD.Inventors: Keiichi TANII, Takeshi NARUO, Shohei SHIBATA, Masaki MORI, Michiharu YAMAMOTO, Yasushi SENDA
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Publication number: 20200284586Abstract: A position capturing system (1) includes a vehicle (5) provided with a measuring unit (2) which magnetically detects a magnetic marker (10) laid in a road and determines a polarity thereof and a GPS unit (35) which measures a position; a database (34) having stored therein a laying position of each of magnetic markers (10) linked with polarity information of the magnetic marker (10); and a position capturing unit (32) which executes processes for capturing the position of the vehicle (5) by selecting corresponding laying position from the database (34) when any of the magnetic markers (10) is detected; and when any of the magnetic markers (10) is detected, selects the laying position located in a specified area with reference to a measured position by the GPS unit (35) and linked with polarity information which complies with the polarity of the detected magnetic marker (10).Type: ApplicationFiled: August 29, 2018Publication date: September 10, 2020Applicant: AICHI STEEL CORPORATIONInventors: Michiharu YAMAMOTO, Tomohiko NAGAO, Hitoshi AOYAMA
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Publication number: 20200285822Abstract: A vehicular system (1) detects a magnetic marker (10) laid in a road and wirelessly communicates with a wireless tag (15) attached to the magnetic marker (10). The system includes a measuring unit (2) which detects the magnetic marker (10) by sensing magnetism, a tag reader (34) which executes a communication process with the wireless tag (15), and a control unit (32) which sets a communication start point as a start point of the communication process by the tag reader (34). The control unit (32) sets, as a communication start point, a time after a lapse of specified time with reference to a time point of detection at which the measuring unit (2) detects the magnetic marker (10). Upon reading information from the wireless tag (15), the tag reader (34) terminates communication, thereby shortening a communication time.Type: ApplicationFiled: September 10, 2018Publication date: September 10, 2020Applicant: Aichi Steel CorporationInventor: Michiharu YAMAMOTO
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Publication number: 20200247300Abstract: A magnetic marker retaining method that includes placing a plurality of sheet-shaped magnetic markers on a surface of a band-shaped carrier sheet, the plurality of sheet-shaped magnetic markers being so as to be spaced in a longitudinal direction of the band-shaped carrier sheet; and retaining the plurality of sheet-shaped magnetic markers in a state of a roll body with the band-shaped carrier sheet rolled up in a roll shape, the band-shaped carrier sheet being rolled up such that each surface of the plurality of sheet-shaped magnetic markers directly contacts the other side of the surface of the band-shaped carrier sheet, on which the plurality of sheet-shaped magnetic markers are placed, and the plurality of sheet-shaped magnetic markers being to be laid on a road.Type: ApplicationFiled: April 6, 2020Publication date: August 6, 2020Applicant: Aichi Steel CorporationInventors: Michiharu YAMAMOTO, Tomohiko NAGAO, Hitoshi AOYAMA
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Publication number: 20200217904Abstract: An object is to provide a magneto-sensitive wire (magneto-sensitive body) with which the measurement range of a magnetic sensor can be expanded, the heat resistance and the high-temperature durability can be improved, and other appropriate properties can be obtained. The magneto-sensitive wire of the present invention is composed of a Co-based alloy having a composite structure in which crystal grains are dispersed in an amorphous phase. The Co-based alloy is, for example, a Co—Fe—Si—B-based alloy. In this case, the total amount of Si and B is preferably 20 to 25 at % with respect to the Co-based alloy as a whole. Preferably, the average diameter of the crystal grains is 70 nm or less and the area ratio of the crystal grains is 10% or less to the composite structure as a whole. The magneto-sensitive wire has a circular cross section, for example, and the wire diameter is about 1 to 100 ?m.Type: ApplicationFiled: August 8, 2018Publication date: July 9, 2020Applicant: AICHI STEEL CORPORATIONInventors: Norihiko HAMADA, Akihiro SHIMODE
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Patent number: 10638758Abstract: Provided is a novel heterocycle-containing amino acid compound that has a metal uptake ability equivalent to mugineic acids and can be less expensively produced than mugineic acids. Also provided are a fertilizer and a plant growth regulating agent each comprising the novel heterocycle-containing amino acid compound. The present invention is a heterocycle-containing amino acid compound represented by general formula (1): (wherein: R1, R2 and R3 are the same or different and represent a hydrogen atom or a carboxyl-protecting group; R4 represents a hydrogen atom or a hydroxy-protecting group; R5 represents a hydrogen atom or an amino-protecting group; and n is an integer of 1-3) or a salt thereof and use of the same.Type: GrantFiled: November 1, 2016Date of Patent: May 5, 2020Assignees: AICHI STEEL CORPORATION, TOKUSHIMA UNIVERSITYInventors: Kosuke Namba, Yoshiko Murata