Patents by Inventor Kenzo Makino

Kenzo Makino has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11169224
    Abstract: A magnetic field detection device includes a magnetic field detection element, a modulator, and a demodulator. The magnetic field detection element has a sensitivity axis in a first direction. The modulator is configured to apply, to the magnetic field detection element, a stress oscillating at a first frequency and including a component in a second direction, the second direction being orthogonal to the first direction. The demodulator is configured to demodulate an output signal having the first frequency and outputted from the magnetic field detection element, and detect, on a basis of an amplitude of the output signal, an intensity of a measurement magnetic field to be received by the magnetic field detection element.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: November 9, 2021
    Assignee: TDK CORPORATION
    Inventors: Kenzo Makino, Hiraku Hirabayashi
  • Publication number: 20210302511
    Abstract: A magnetic sensor includes an MR element and a support member. A top surface of the support member includes an inclined portion. The MR element includes an MR element main body, a lower electrode, and an upper electrode. The lower electrode includes a first end closest to a lower end of the inclined portion and a second end closest to an upper end of the inclined portion. The MR element main body is located at a position closer to the second end than to the first end.
    Type: Application
    Filed: December 22, 2020
    Publication date: September 30, 2021
    Applicant: TDK CORPORATION
    Inventors: Kenzo MAKINO, Takafumi KOBAYASHI
  • Publication number: 20210293857
    Abstract: A magnetic field detection apparatus includes a magnetoresistive effect element and a coil. The coil includes first and second tier parts opposed to each other in a first axis direction, with the magnetoresistive effect element interposed therebetween. The coil is configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect element in a second axis direction. The first tier part includes first conductors extending in a third axis direction, arranged in the second axis direction and coupled in parallel to each other. The second tier part includes a second conductor or second conductors extending in the third axis direction, the second conductors being arranged in the second axis direction and coupled in parallel to each other. The first conductors each have a width smaller than a width of the second conductor or each of the second conductors.
    Type: Application
    Filed: March 1, 2021
    Publication date: September 23, 2021
    Applicant: TDK CORPORATION
    Inventors: Takafumi KOBAYASHI, Norikazu OTA, Kenzo MAKINO
  • Publication number: 20210293902
    Abstract: A magnetic sensor device includes a conductor that constitutes a coil, and a detection circuit including a plurality of MR elements. The coil includes an upper coil portion. The upper coil portion includes a first conductor portion and a second conductor portion. An average cross-sectional area of the upper coil portion in the first conductor portion of the upper coil portion is smaller than that of the upper coil portion in the second conductor portion. The first conductor portion is located at a position where a first partial magnetic field occurring from the first conductor portion is applied to an MR element.
    Type: Application
    Filed: February 4, 2021
    Publication date: September 23, 2021
    Applicant: TDK CORPORATION
    Inventors: Kenzo MAKINO, Takafumi KOBAYASHI, Hiroshi YAMAZAKI
  • Patent number: 11114968
    Abstract: A rotating electric machine apparatus including: a rotating electric machine (REM) including a rotor and a stator; an inverter device including an inverter circuit (IC) for driving the REM and an inverter control unit (ICU) for controlling the IC; a detector, in which a first antenna is connected to a resonance circuitry, which is mounted to the REM and has a resonance characteristic that changes depending on a change in a physical quantity; and a detection processor receiving a response radio wave indicating a detection result of the change in the physical quantity from the first antenna while transmitting a transmission radio wave at a set carrier frequency from a second antenna, and comparing the detection result and the set value, to thereby obtain an abnormal state in the REM. The ICU controls output of the IC in accordance with an abnormal state signal from the detection processor.
    Type: Grant
    Filed: November 24, 2017
    Date of Patent: September 7, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshihiro Miyama, Hideaki Arita, Junji Hori, Tomohira Takahashi, Kenzo Makino, Masaya Inoue
  • Publication number: 20210269075
    Abstract: A rail breakage detection device includes a first core part provided to a first cable connecting an electrical neutral point of an impedance bond that electrically connects a first rail and a second rail to the first rail, a second core part provided to a second cable connecting the electrical neutral point of the impedance bond to the second rail, a first coil wound around the first core part to generate a first electromotive force in accordance with a current variation occurring in the first cable, a second coil connected electrically to the first coil and wound around the second core part to generate a second electromotive force in accordance with a current variation occurring in the second cable, and a CPU to determine that the first or second rail is broken based on an electromotive force that is a sum of the first and second electromotive forces.
    Type: Application
    Filed: July 26, 2018
    Publication date: September 2, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tomoaki TAKEWA, Takafumi NAGANO, Yoshitsugu SAWA, Wataru TSUJITA, Kenzo MAKINO, Katsunori TSUCHIDA, Daisuke KOSHINO
  • Publication number: 20210181241
    Abstract: A magnetic field detection apparatus includes a magnetoresistive effect element and a conductor. The magnetoresistive effect element includes a magnetoresistive effect film extending in a first axis direction and including a first end part, a second end part, and an intermediate part between the first and second end parts. The conductor includes a first part and a second part that each extend in a second axis direction inclined with respect to the first axis direction. The conductor is configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect film in a third axis direction orthogonal to the second axis direction. The first part and the second part respectively overlap the first end part and the second end part in a fourth axis direction orthogonal to both of the second axis direction and the third axis direction.
    Type: Application
    Filed: October 27, 2020
    Publication date: June 17, 2021
    Applicant: TDK CORPORATION
    Inventors: Norikazu OTA, Kenzo MAKINO, Hiraku HIRABAYASHI
  • Publication number: 20210181240
    Abstract: A magnetic field detection apparatus includes a magnetoresistive effect element and a helical coil. The magnetoresistive effect element includes a magnetoresistive effect film extending in a first axis direction. The helical coil includes a parallel connection including first and second parts extending in a second axis direction inclined with respect to the first axis direction. The first and second parts are adjacent to each other in a third axis direction and coupled to each other in parallel. The helical coil is wound around the magnetoresistive effect element while extending along the third axis direction. The magnetoresistive effect film overlaps the first and second parts in a fourth axis direction orthogonal to the second and third axis directions. The helical coil is configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect film in the third axis direction.
    Type: Application
    Filed: October 27, 2020
    Publication date: June 17, 2021
    Applicant: TDK CORPORATION
    Inventors: Norikazu OTA, Kenzo MAKINO, Hiraku HIRABAYASHI
  • Publication number: 20210156933
    Abstract: A magnetic sensor includes at least one MR element and a coil. The coil includes at least one conductor portion. The at least one conductor portion is each located at a position such that a partial magnetic field generated by the conductor portion is applied to one of the at least one MR element, the one corresponding to the conductor portion, and extends along an imaginary curve curving to protrude in a direction away from the corresponding MR element.
    Type: Application
    Filed: October 29, 2020
    Publication date: May 27, 2021
    Applicant: TDK CORPORATION
    Inventors: Kenzo MAKINO, Norikazu OTA
  • Patent number: 11001282
    Abstract: A rail state monitoring apparatus (1) includes: first and second transmission antennas (101, 102) to transmit first and second electric signals to rails (5, 6), respectively; first reception antenna (201) to receive a surface wave (21) of the first electric signal propagated through rail (5) and guided wave (32) of the second electric signal propagated through loop coil (10); second reception antenna (202) to receive surface wave (22) of the second electric signal propagated through rail (6) and guided wave (31) of the first electric signal propagated through loop coil (10); and a processor. The processor obtains received powers of the respective electric signals received by first and second reception antennas (201, 202), determines a rail state from “good”, “rail broken”, “rail crack”, or “rail surface anomaly” based on the received powers, and outputs the rail state as rail state information.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: May 11, 2021
    Assignees: MITSUBISHI ELECTRIC CORPORATION, MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC.
    Inventors: Wataru Tsujita, Kenzo Makino, Atsushi Takami, Bingnan Wang
  • Publication number: 20210018337
    Abstract: A magnetic sensor generates a detection signal that varies according to the strength of a target magnetic field at a detection position in a reference plane. The magnetic sensor includes a magnetoresistive element. The magnetoresistive element includes a magnetization pinned layer having a magnetization in a first direction, and a free layer having a magnetization whose direction is variable according to the direction of an acting magnetic field, the acting magnetic field being a composite magnetic field of all magnetic fields acting on the free layer. The free layer has uniaxial magnetic anisotropy such that an easy axis of magnetization is oriented in a direction parallel to a second direction. In the reference plane, both of two directions orthogonal to the second direction are different from the direction of the target magnetic field.
    Type: Application
    Filed: October 7, 2020
    Publication date: January 21, 2021
    Applicant: TDK CORPORATION
    Inventors: Kenzo MAKINO, Tsuyoshi UMEHARA
  • Patent number: 10830838
    Abstract: A magnetic sensor includes a magnetic field conversion unit, a magnetic field detection unit, and a magnetic film. The magnetic field conversion unit includes a yoke that receives an input magnetic field and generates an output magnetic field. The input magnetic field contains an input magnetic field component in a direction parallel to Z direction. The output magnetic field contains an output magnetic field component in a direction parallel to X direction. The magnetic field detection unit includes a magnetic detection element that receives the output magnetic field and generates a detection value corresponding to the output magnetic field component. The magnetic film absorbs part of magnetic flux resulting from a noise magnetic field, which is a magnetic field in a direction to which the magnetic detection element has sensitivity and which is other than the output magnetic field component.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: November 10, 2020
    Assignee: TDK CORPORATION
    Inventors: Keisuke Uchida, Kenzo Makino
  • Patent number: 10830614
    Abstract: A magnetic sensor generates a detection signal that varies according to the strength of a target magnetic field at a detection position in a reference plane. The magnetic sensor includes a magnetoresistive element. The magnetoresistive element includes a magnetization pinned layer having a magnetization in a first direction, and a free layer having a magnetization whose direction is variable according to the direction of an acting magnetic field, the acting magnetic field being a composite magnetic field of all magnetic fields acting on the free layer. The free layer has uniaxial magnetic anisotropy such that an easy axis of magnetization is oriented in a direction parallel to a second direction. In the reference plane, both of two directions orthogonal to the second direction are different from the direction of the target magnetic field.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: November 10, 2020
    Assignee: TDK CORPORATION
    Inventors: Kenzo Makino, Tsuyoshi Umehara
  • Publication number: 20200300942
    Abstract: A magneto-resistive effect element includes a magnetization free layer, an intermediate layer, and a magnetization pinned layer. The magnetization free layer extends along a first plane. The intermediate layer extends along the first plane, and is stacked on the magnetization free layer. The magnetization pinned layer extends along the first plane, and is provided on side opposite to the magnetization free layer with the intermediate layer being interposed therebetween. Here, the magnetization free layer includes an end surface that has a maximum inclination angle of 42° or less relative to the first plane.
    Type: Application
    Filed: June 9, 2020
    Publication date: September 24, 2020
    Applicant: TDK CORPORATION
    Inventors: Kenzo MAKINO, Suguru WATANABE, Yasushi NISHIOKA, Hirokazu TAKAHASHI
  • Publication number: 20200300944
    Abstract: A magnetic field detection device includes a magnetism detection element, a modulator, and a demodulator. The magnetism detection element has a sensitivity axis along a first direction. The modulator is configured to impart a spin torque to the magnetism detection element. The spin torque has a rotational force and oscillates at a first frequency. The rotational force is exerted on a plane including the first direction and a second direction orthogonal to the first direction. The demodulator is configured to demodulate an output signal received from the magnetism detection element and to detect an intensity of a measurement target magnetic field exerted on the magnetism detection element on the basis of an amplitude of the output signal. The output signal has the first frequency.
    Type: Application
    Filed: February 10, 2020
    Publication date: September 24, 2020
    Applicant: TDK Corporation
    Inventors: Kenzo MAKINO, Hiroshi KIYONO
  • Publication number: 20200295694
    Abstract: A rotating electric machine apparatus including: a rotating electric machine (REM) including a rotor and a stator; an inverter device including an inverter circuit (IC) for driving the REM and an inverter control unit (ICU) for controlling the IC; a detector, in which a first antenna is connected to a resonance circuitry, which is mounted to the REM and has a resonance characteristic that changes depending on a change in a physical quantity; and a detection processor receiving a response radio wave indicating a detection result of the change in the physical quantity from the first antenna while transmitting a transmission radio wave at a set carrier frequency from a second antenna, and comparing the detection result and the set value, to thereby obtain an abnormal state in the REM. The ICU controls output of the IC in accordance with an abnormal state signal from the detection processor.
    Type: Application
    Filed: November 24, 2017
    Publication date: September 17, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yoshihiro MIYAMA, Hideaki ARITA, Junji HORI, Tomohira TAKAHASHI, Kenzo MAKINO, Masaya INOUE
  • Publication number: 20200292630
    Abstract: A magnet flux absorber of the present invention has a soft magnetic layer having a first surface and a second surface that is a back surface of the first surface, as well as and at least one magnetically pinning portion that faces a part of the first surface of the soft magnetic layer or a part of the second surface of the soft magnetic layer. A region of the soft magnetic layer that faces the magnetically pinning portion is magnetized by the magnetically pinning portion in a direction that is different from a direction in which at least a part of remaining region of the soft magnetic layer is magnetized.
    Type: Application
    Filed: February 24, 2020
    Publication date: September 17, 2020
    Inventor: Kenzo MAKINO
  • Publication number: 20200284664
    Abstract: A temperature detection device includes: a detection processing unit configured to transmit a transmission radio wave, simultaneously receive a response radio wave corresponding to the transmission radio wave, and detect whether a temperature of an object to be measured is normal or abnormal based on the response radio wave; and a temperature sensing unit configured to receive the transmission radio wave and transmit the response radio wave responding to the transmission radio wave. The detection processing unit calculates, from the response radio wave received via a second antenna, an amplitude, a phase, or a quadrature phase amplitude of the response radio wave and compares the temperature of the object to be measured to a temperature determined in advance based on a result of the calculation.
    Type: Application
    Filed: November 24, 2017
    Publication date: September 10, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kenzo MAKINO, Hideaki ARITA, Masaya INOUE, Junji HORI, Hiroshi ARAKI, Yoshitsugu SAWA, Wataru TSUJITA
  • Patent number: 10718828
    Abstract: A magneto-resistive effect element includes a magnetization free layer, an intermediate layer, and a magnetization pinned layer. The magnetization free layer extends along a first plane. The intermediate layer extends along the first plane, and is stacked on the magnetization free layer. The magnetization pinned layer extends along the first plane, and is provided on side opposite to the magnetization free layer with the intermediate layer being interposed therebetween. Here, the magnetization free layer includes an end surface that has a maximum inclination angle of 42° or less relative to the first plane.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: July 21, 2020
    Assignee: TDK CORPORATION
    Inventors: Kenzo Makino, Suguru Watanabe, Yasushi Nishioka, Hirokazu Takahashi
  • Publication number: 20200209325
    Abstract: A magnetic field detection device includes a magnetic field detection element, a modulator, and a demodulator. The magnetic field detection element has a sensitivity axis in a first direction. The modulator is configured to apply, to the magnetic field detection element, a stress oscillating at a first frequency and including a component in a second direction, the second direction being orthogonal to the first direction. The demodulator is configured to demodulate an output signal having the first frequency and outputted from the magnetic field detection element, and detect, on a basis of an amplitude of the output signal, an intensity of a measurement magnetic field to be received by the magnetic field detection element.
    Type: Application
    Filed: December 2, 2019
    Publication date: July 2, 2020
    Applicant: TDK CORPORATION
    Inventors: Kenzo MAKINO, Hiraku HIRABAYASHI