Patents by Inventor Mutsumi Suzuki

Mutsumi Suzuki 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).

  • Publication number: 20230223829
    Abstract: A stator structure of an embodiment includes a stator core that comprises: a ring-shaped main body; and a plurality of teeth extending in a radial direction of the main body and arranged along a circumferential direction of the main body. The main body comprises a plurality of elongated holes that are formed in an arc shape along the circumferential direction of the main body and that are arranged along the circumferential direction of the main body, and a plurality of holes that are arranged along the circumferential direction of the main body between the teeth and the elongated holes in the radial direction of the main body. At least one of the holes is disposed between beams and the teeth located close to the beams, the beams being provided between the adjacent elongated holes.
    Type: Application
    Filed: March 8, 2023
    Publication date: July 13, 2023
    Inventors: Mutsumi MATSUURA, Takashi NAKAGAWA, Hiroshi ABE, Shinya SUZUKI
  • Publication number: 20230173807
    Abstract: Provided is a liquid droplet generation method capable of generating liquid droplets having a diameter of 100 ┬Ám or more. The liquid droplet generation method for generating liquid droplets from a liquid layer 20 by using a plurality of transducers 18, the method including irradiating the liquid layer 20 with a plurality of ultrasonic waves from the plurality of transducers 18 to scatter primary liquid droplets 21A and 21B from the liquid layer 20, and causing the primary liquid droplets 21A and 21B being scattered to aggregate and grow into a secondary liquid droplet 22A.
    Type: Application
    Filed: May 6, 2021
    Publication date: June 8, 2023
    Inventors: Yuusuke KOURAI, Mutsumi SUZUKI, Hirohisa MIZOTA, Masanori KITAOKA, Kota SASAKI
  • Publication number: 20220283125
    Abstract: To improve defect detection accuracy, an ultrasonic inspection device causing an ultrasound beam to enter an object through a gas for inspection of the object includes: a transmission probe emitting the ultrasound beam; a reception probe mounted on an opposite side of the object from the transmission probe; and an eccentric distance adjuster that adjusts an eccentric distance between a transmission sound axis which is the central axis of the propagation path of the ultrasound beam transmitted from the transmission probe and a reception sound axis which is the central axis of the propagation path of an ultrasound beam assumed to be emitted from the reception probe to a distance greater than zero.
    Type: Application
    Filed: August 1, 2020
    Publication date: September 8, 2022
    Inventor: Mutsumi SUZUKI
  • Patent number: 11009346
    Abstract: An object is to provide an ultrasonic measurement apparatus capable of measuring a gap length between a rotational body and a casing without providing a reference position indication member on the rotational body in fluid machinery. The ultrasonic measurement apparatus which applies to fluid machinery having a rotational body as a measurement object includes: an ultrasonic probe installed and used outside a casing part of the fluid machinery, the casing part accommodating the rotational body; a measurement circuit unit electrically connected to the ultrasonic probe; and a reference signal generation unit.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: May 18, 2021
    Assignee: Hitachi, Ltd.
    Inventor: Mutsumi Suzuki
  • Publication number: 20210050348
    Abstract: Provided is a SiC semiconductor element equipped with a SiC integrated circuit having a stable characteristic, which operates normally even in a radiation environment. A radiation resistant circuit device includes: a SiC semiconductor element equipped with a SiC integrated circuit, a printed board on which the SiC semiconductor element is provided, a conductive wiring that is arranged inside the printed board and has a predetermined surface facing a bottom surface of a substrate electrode of the SiC integrated circuit, and an insulating material arranged between the bottom surface of the substrate electrode of the SiC integrated circuit and the predetermined surface of the conductive wiring.
    Type: Application
    Filed: July 23, 2020
    Publication date: February 18, 2021
    Inventors: Ryo KUWANA, Masahiro MASUNAGA, Mutsumi SUZUKI, Isao HARA
  • Publication number: 20190368869
    Abstract: An object is to provide an ultrasonic measurement apparatus capable of measuring a gap length between a rotational body and a casing without providing a reference position indication member on the rotational body in fluid machinery. The ultrasonic measurement apparatus which applies to fluid machinery having a rotational body as a measurement object includes: an ultrasonic probe installed and used outside a casing part of the fluid machinery, the casing part accommodating the rotational body; a measurement circuit unit electrically connected to the ultrasonic probe; and a reference signal generation unit.
    Type: Application
    Filed: November 20, 2017
    Publication date: December 5, 2019
    Inventor: Mutsumi SUZUKI
  • Patent number: 10101404
    Abstract: A battery monitoring device includes a first voltage measurement unit, a second voltage measurement unit, a current measurement unit, a cell voltage ratio calculation unit, a cell voltage calculation unit, and a trigger signal generation unit. The cell voltage ratio is a ratio of an individual cell voltage measurement value to a total sum of all cell voltage measurement values. The cell voltage measurement value is equal to the cell voltage ratio multiplied by the total voltage of all of the battery cells constituting the battery pack.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: October 16, 2018
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Mutsumi Suzuki, Mutsumi Kikuchi
  • Publication number: 20170030976
    Abstract: A battery monitoring device which monitors a battery pack where a plurality of battery cells are connected in series, includes: a first voltage measurement unit which measures a voltage between terminals of each of the battery cells; a second voltage measurement unit which measures a voltage of two ends of a battery cell group where at least two or more battery cells are connected in series among the plurality of the battery cells; a current measurement unit which measures a current flowing through the battery pack; a cell voltage ratio calculation unit which calculates each call voltage ratio of the plurality of the battery cell based on the voltage between the terminals measured by the first voltage measurement unit; a cell voltage calculation unit which measures each cell voltage of the plurality of the battery cell at the time of measuring the voltage between the two ends based on the cell voltage ratio and the voltage between the two ends measured by the second voltage measurement unit; and a trigger sig
    Type: Application
    Filed: April 9, 2015
    Publication date: February 2, 2017
    Inventors: Mutsumi SUZUKI, Mutsumi KIKUCHI
  • Patent number: 9506997
    Abstract: In a magnetic-field angle detection device and a rotation angle detection device in which the accuracy of the measured angle is not degraded even if the MR ratio of the tunneling magnetoresistance element is increased. In a magnetic-field-angle measurement apparatus including a magnetic-field-angle detection circuit and a magnetic sensor having a tunneling magnetoresistance element with a pinned magnetic layer, the magnetic-field-angle detection circuit has a power-supply unit that outputs a constant voltage as a bias voltage to the tunneling magnetoresistance element of the magnetic sensor and a current-detection unit that detects an output current of the tunneling magnetoresistance element.
    Type: Grant
    Filed: May 14, 2010
    Date of Patent: November 29, 2016
    Assignee: Hitachi, Ltd.
    Inventors: Mutsumi Suzuki, Hiroshi Iwasawa, Masahiro Iwamura
  • Patent number: 9074866
    Abstract: Rotational angle measurement apparatus measuring magnetic-field angle or rotational angle with sufficient accuracy wherein a non-magnetic conductor is arranged in the vicinity of the magnetic flux generator or the magnetic sensor, even when the magnetic flux generator rotates at high speed. The rotational angle measurement apparatus is configured with a magnetic sensor 70 which responds to a magnetic-field angle and a detection unit 302 which inputs an output of the magnetic sensor. The rotational angle measurement apparatus is employed with a rotatable body 121 provided with a magnetic flux generator 202. The output of the magnetic sensor is a raw-angle signal set 155 corresponding to the magnetic-field angle. The detection unit outputs a corrected angle after a non-magnetic conductor in the vicinity of the magnetic sensor is corrected, using a correction value outputted by a correction function with rotational velocity of the rotatable body as an argument.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: July 7, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventor: Mutsumi Suzuki
  • Publication number: 20140125267
    Abstract: Rotational angle measurement apparatus measuring magnetic-field angle or rotational angle with sufficient accuracy wherein a non-magnetic conductor is arranged in the vicinity of the magnetic flux generator or the magnetic sensor, even when the magnetic flux generator rotates at high speed. The rotational angle measurement apparatus is configured with a magnetic sensor 70 which responds to a magnetic-field angle and a detection unit 302 which inputs an output of the magnetic sensor. The rotational angle measurement apparatus is employed with a rotatable body 121 provided with a magnetic flux generator 202. The output of the magnetic sensor is a raw-angle signal set 155 corresponding to the magnetic-field angle. The detection unit outputs a corrected angle after a non-magnetic conductor in the vicinity of the magnetic sensor is corrected, using a correction value outputted by a correction function with rotational velocity of the rotatable body as an argument.
    Type: Application
    Filed: June 21, 2012
    Publication date: May 8, 2014
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventor: Mutsumi Suzuki
  • Patent number: 8717017
    Abstract: There has been a problem that a bridge circuit using magneto-resistive elements or transducer elements could output a signal including an offset voltage, which could result in lower measurement accuracy. In order to solve such a problem, half-bridges each having magneto-resistive elements or transducer elements are excited with different excitation voltages so that the offset voltage is eliminated and the measurement accuracy is improved.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: May 6, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Mutsumi Suzuki, Nobuyasu Kanekawa, Masamichi Yamada
  • Publication number: 20130264915
    Abstract: In a rotation angle measurement apparatus using a bridge configuration of a magneto-resistance element, a correct angle is not output when a fault occurs. For this reason, there is a problem in which an upper-layer system using the same is broken down. However, in order to solve this problem, there is provided a rotation angle measurement apparatus including a SIN bridge and a COS bridge each of which includes a magneto-resistance element and a detection unit, wherein the detection unit outputs an angle signal based on a signal output from a normal half bridge when a fault occurs in any one of respective half bridges of the COS bridge or the SIN bridge.
    Type: Application
    Filed: December 20, 2011
    Publication date: October 10, 2013
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Mutsumi Suzuki, Katsuaki Fukatsu, Takafumi Matsumura
  • Patent number: 8471552
    Abstract: A rotational angle-measurement apparatus with high accuracy is provided through electric correction of the rotational angle-measurement apparatus by rotating the rotation shaft at a constant speed. The rotational angle-measurement apparatus includes an electric motor having a rotation shaft, a magnet mounted on one end of the rotation shaft, and a magnetic sensor with an output signal that changes in accordance with an orientation of a magnetic field surrounding the magnetic sensor. The magnetic sensor outputs an angle signal representing the rotational angle of the rotation shaft, and the correction procedure utilizes rotation of the electric motor shaft through more than one revolution at a rotational speed with a known rate of change.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: June 25, 2013
    Assignee: Hitachi, Ltd.
    Inventor: Mutsumi Suzuki
  • Patent number: 8441252
    Abstract: The object of the invention is to provide a rotational angle measurement apparatus that is capable of correcting an error due to pin-angle error with a small amount of calculation operation. The rotational angle measurement apparatus includes a magnetic sensor 301 and a signal processing unit 303M. The magnetic sensor includes two bridges comprising magneto-resistance elements each having a pinned magnetic layer. A ratio-calculation unit 381 of the signal processing unit 303M calculates a ratio Vy/Vx of output signals Vx and Vy. A parameter correction unit 382 subtracts a predetermined correction parameter ? from the ratio Vy/Vx calculated by the ratio-calculation unit. An a tan-processing unit 383 conducts arctangent processing on the value calculated by the parameter correction unit and calculates an angle of magnetic field ?.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: May 14, 2013
    Assignee: Hitachi, Ltd.
    Inventor: Mutsumi Suzuki
  • Publication number: 20130063135
    Abstract: In a magnetic-field angle detection device and a rotation angle detection device in which the accuracy of the measured angle is not degraded even if the MR ratio of the tunneling magnetoresistance element is increased. In a magnetic-field-angle measurement apparatus including a magnetic-field-angle detection circuit and a magnetic sensor having a tunneling magnetoresistance element with a pinned magnetic layer, the magnetic-field-angle detection circuit has a power-supply unit that outputs a constant voltage as a bias voltage to the tunneling magnetoresistance element of the magnetic sensor and a current-detection unit that detects an output current of the tunneling magnetoresistance element.
    Type: Application
    Filed: May 14, 2010
    Publication date: March 14, 2013
    Inventors: Mutsumi Suzuki, Hiroshi Iwasawa, Masahiro Iwamura
  • Patent number: 7977859
    Abstract: Degradation of an electron emission element by irradiation of the positive ion generated inside a panel is suppressed. A deflection electrode is periodically disposed, and the electron emission region of an electron emission element is disposed so as not to include a center line between adjacent deflection electrodes, so that an electron beam trajectory is deflected and bombardment or irradiation of the generated positive ion to the electron emission region is prevented.
    Type: Grant
    Filed: June 3, 2008
    Date of Patent: July 12, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Mutsumi Suzuki, Toshiaki Kusunoki
  • Publication number: 20110115477
    Abstract: The object of the invention is to provide a rotational angle measurement apparatus that is capable of correcting an error due to pin-angle error with a small amount of calculation operation. The rotational angle measurement apparatus includes a magnetic sensor 301 and a signal processing unit 303M. The magnetic sensor includes two bridges comprising magneto-resistance elements each having a pinned magnetic layer. A ratio-calculation unit 381 of the signal processing unit 303M calculates a ratio Vy/Vx of output signals Vx and Vy. A parameter correction unit 382 subtracts a predetermined correction parameter ? from the ratio Vy/Vx calculated by the ratio-calculation unit. An a tan-processing unit 383 conducts arctangent processing on the value calculated by the parameter correction unit and calculates an angle of magnetic field ?.
    Type: Application
    Filed: November 16, 2010
    Publication date: May 19, 2011
    Inventor: Mutsumi SUZUKI
  • Patent number: 7919911
    Abstract: By making Nd concentration in the tunneling insulating film 11 smaller than Nd concentration in the base electrode first layer 16, the accumulated electric charge amount in the tunneling insulating film 11 is reduced and afterimage is decreased. By setting a relation between a position of a stack interface of the base electrode 13 and a thickness of an insulating layer properly, the generation of a device defect is prevented.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: April 5, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Mutsumi Suzuki, Masakazu Sagawa, Toshiaki Kusunoki
  • Publication number: 20100321006
    Abstract: A rotational angle-measurement apparatus with high accuracy is provided through the electric correction of the rotational angle-measurement apparatus by rotating the rotation shaft at a constant speed.
    Type: Application
    Filed: March 30, 2010
    Publication date: December 23, 2010
    Applicant: Hitachi, Ltd.
    Inventor: Mutsumi SUZUKI