Patents by Inventor Yuhei Yamaguchi

Yuhei Yamaguchi 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: 20200363817
    Abstract: An autonomous moving apparatus control system including a range sensor, a reflection plate, and a control unit. The range sensor is installed in a cage of an elevator and detects a distance to an object by receiving reflected light of signal light applied to the object. The reflection plate is disposed in an elevator hall of a floor on which the elevator stops, and reflects the signal light. The control unit determines whether or not a mobile robot, which is an autonomous moving apparatus, can get on and off the elevator based on a detected distance, the detected distance being a distance to the reflection plate detected by the range sensor.
    Type: Application
    Filed: April 1, 2020
    Publication date: November 19, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomohisa TAKAI, Yuhei YAMAGUCHI, Satoshi TOYOSHIMA, Yuta WATANABE, Mikio HONDA, Shiro ODA, Tetsuya TAIRA, Nobuhisa OTSUKI
  • Publication number: 20200363802
    Abstract: An autonomous moving body includes: a determination unit configured to determine that the autonomous moving body has arrived at a waiting area on a current floor before the autonomous moving body gets on a car of the elevator; an orientation adjustment unit configured to adjust, when the determination unit determines that the autonomous moving body has arrived at the waiting area, an orientation of the autonomous moving body based on an exiting direction from the car on a destination floor; and a movement controller configured to cause, when the car arrives, the autonomous moving body to enter the car while maintaining the orientation adjusted by the orientation adjustment unit.
    Type: Application
    Filed: April 9, 2020
    Publication date: November 19, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomohisa TAKAI, Yuhei YAMAGUCHI, Satoshi TOYOSHIMA, Yuta WATANABE, Mikio HONDA, Shiro ODA, Tetsuya TAIRA, Nobuhisa OTSUKI
  • Publication number: 20200289893
    Abstract: The balance training apparatus includes: a moving cart capable of moving on a moving surface by driving a driving unit; a movement controller configured to drive the driving unit and to move the moving cart in accordance with a predetermined swing pattern; a posture detection sensor that is provided in the moving cart and is configured to detect that disturbance of the state of a trainee who is standing on the moving cart has become outside of a predetermined range; and a difficulty level setting unit configured to instruct the movement controller to change the swing pattern and change the difficulty level of the training that moves the moving cart based on results of detecting the state of the trainee regarding which a notification is sent from the posture detection sensor.
    Type: Application
    Filed: March 2, 2020
    Publication date: September 17, 2020
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventor: Yuhei Yamaguchi
  • Patent number: 10778213
    Abstract: A diving circuit drives an output transistor according to a control signal SCTRL. The gate of the first transistor is biased. The source of the first transistor is coupled to an internal line. In the on period of the output transistor, the voltage of the internal line is applied to a control electrode of the output transistor. A voltage correction circuit controls the internal line so as to gradually lower the voltage VREGB of the internal line with time.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: September 15, 2020
    Assignee: ROHM CO., LTD.
    Inventors: Tetsuo Tateishi, Hiroto Oshita, Yuhei Yamaguchi
  • Publication number: 20200238838
    Abstract: A current mode control type switching power supply device includes a first switch having a first terminal connected to a first application terminal to which an input voltage is applied, and a second switch having a first terminal connected to a second terminal of the first switch and a second terminal connected to a second application terminal to which a predetermined voltage lower than the input voltage is applied. A current sensor is configured to sense current flowing in the second switch. A controller configured to control the first switch and the second switch, wherein the controller is configured to control the first switch and the second switch independently of a difference between the input voltage and an output voltage and in addition in accordance with the current sensed by the current sensor.
    Type: Application
    Filed: January 30, 2020
    Publication date: July 30, 2020
    Applicant: Rohm Co., Ltd.
    Inventor: Yuhei Yamaguchi
  • Publication number: 20200157465
    Abstract: The present disclosure is: a free polyunsaturated fatty acid-containing composition, which comprises at least one free polyunsaturated fatty acid having 20 or more carbon atoms, the content being at least 80.0% of the fatty acids in the composition, and satisfies at least one selected from a group consisting of conditions (1) and (2): (1) the content of conjugated unsaturated fatty acid is 1.0% or less of the fatty acids in the composition, and (2) the Gardner color is less than 3+; and a manufacturing method for the free polyunsaturated fatty acid-containing composition comprising the preparation of a raw material composition containing at least one polyunsaturated fatty acid having 20 or more carbon atoms, and hydrolysis of a reaction solution containing the prepared raw material composition, a lower alcohol, water and an alkali catalyst at a temperature of 10° C. or lower.
    Type: Application
    Filed: January 24, 2020
    Publication date: May 21, 2020
    Applicant: NIPPON SUISAN KAISHA, LTD.
    Inventors: Yuhei KOSUGE, Hideaki YAMAGUCHI, Nobushige DOISAKI
  • Publication number: 20200133323
    Abstract: There is provided a differential amplifier including: an inverting input terminal to which a first voltage is applied; a non-inverting input terminal to which a second voltage proportional to the first voltage is applied; and an offset part configured to generate a predetermined input offset voltage between the inverting input terminal and the non-inverting input terminal.
    Type: Application
    Filed: October 28, 2019
    Publication date: April 30, 2020
    Applicant: Rohm Co., Ltd.
    Inventors: Isao Takobe, Yuhei Yamaguchi, Tetsuo TATEISHI
  • Publication number: 20200133324
    Abstract: A linear power supply circuit, includes: output transistor between input terminal where input voltage is applied and output terminal where output voltage is applied; a driver driving the output transistor based on difference between voltage based on the output voltage and reference voltage; and phase compensation circuit, wherein the driver includes differential amplifier outputting voltage corresponding to the difference between the voltage based on the output voltage and the reference voltage, a first capacitance having one end where output of the differential amplifier is applied and the other end where ground potential is applied, a converter converting the voltage based on the output of the differential amplifier into current, and a current amplifier amplifying the current output from the converter, and wherein the phase compensation circuit lowers gain of transfer function of the linear power supply circuit and output capacitor connected to the output terminal.
    Type: Application
    Filed: October 29, 2019
    Publication date: April 30, 2020
    Applicant: Rohm Co., Ltd.
    Inventors: Takeshi Nagata, Isao Takobe, Yuhei Yamaguchi
  • Publication number: 20200136496
    Abstract: A switching regulator control circuit is used in a switching regulator that converts an input voltage into an output voltage by the switching of a switching device, and generates a switching signal for controlling the ON/OFF operation of the switching device. The switching regulator control circuit has a fault detector and a fault protector. The fault detector detects, based on the duty ratio of the switching signal or a variable correlated to it and included in a control signal used to generate the switching signal, a fault state where the duty ratio falls outside the normal modulation range. The fault protector stops the switching of the switching device when the fault detector detects a fault state.
    Type: Application
    Filed: October 30, 2019
    Publication date: April 30, 2020
    Applicant: Rohm Co., Ltd.
    Inventors: Yuhei Yamaguchi, Tetsuo Tateishi
  • Patent number: 10626347
    Abstract: The present disclosure is: a free polyunsaturated fatty acid-containing composition, which comprises at least one free polyunsaturated fatty acid having 20 or more carbon atoms, the content being at least 80.0% of the fatty acids in the composition, and satisfies at least one selected from a group consisting of conditions (1) and (2): (1) the content of conjugated unsaturated fatty acid is 1.0% or less of the fatty acids in the composition, and (2) the Gardner color is less than 3+; and a manufacturing method for the free polyunsaturated fatty acid-containing composition comprising the preparation of a raw material composition containing at least one polyunsaturated fatty acid having 20 or more carbon atoms, and hydrolysis of a reaction solution containing the prepared raw material composition, a lower alcohol, water and an alkali catalyst at a temperature of 10° C. or lower.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: April 21, 2020
    Assignee: NIPPON SUISAN KAISHA, LTD.
    Inventors: Yuhei Kosuge, Hideaki Yamaguchi, Nobushige Doisaki
  • Patent number: 10589636
    Abstract: A switching power supply device includes a first switch, a second switch, a current sensing portion configured to sense current flowing in the second switch, and a controller configured to control the first and second switches. The controller controls the first switch and the second switch in accordance with current sensed by the current sensing portion if a ratio of the output voltage to the input voltage is a predetermined value or lower, and controls the first switch and the second switch independently of the current sensed by the current sensing portion if the ratio of the output voltage to the input voltage is higher than the predetermined value.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: March 17, 2020
    Assignee: Rohm Co., Ltd.
    Inventor: Yuhei Yamaguchi
  • Publication number: 20200080995
    Abstract: A method for measuring fibroblast growth factor-23 (hereinafter, indicated as FGF-23) in a sample, which comprises the steps of: (1) reacting in an aqueous medium, a sample and a first antibody or an antibody fragment thereof which binds to FGF-23; (2) reacting in an aqueous medium, a second antibody or an antibody fragment thereof which binds to FGF-23 with Immunocomplex 1 produced in the aforementioned step (1) to produce Immunocomplex 2 consisting of the first antibody or the antibody fragment thereof which binds to FGF-23, FGF-23, and the second antibody or the antibody fragment thereof which binds to FGF-23; and (3) measuring Immunocomplex 2 produced in the aforementioned step (2); wherein the reaction of step (1) and/or step (2) is carried out in an aqueous medium comprising a surfactant such as a polyoxyethylene alkyl ether.
    Type: Application
    Filed: May 30, 2018
    Publication date: March 12, 2020
    Applicant: Hitachi Chemical Diagnostics Systems Co., Ltd.
    Inventors: Yuhei Yamaguchi, Hiromi Miyazaki, Hitoshi Ono
  • Publication number: 20200083009
    Abstract: A pulse control device 10 comprises: a switch output unit 100 which generates a pulse output voltage Vo from a direct-current input voltage Vi and supplies the pulse output voltage Vo to a load (such as a relay coil 21 of a mechanical relay 20); a low-pass filter unit 300 which receives a feedback input of the pulse output voltage Vo and generates a feedback voltage Vfb; and an output feedback control unit 200 which receives an input of the feedback voltage Vfb and controls the switch output unit 100 so that an average value of the pulse output voltage Vo becomes constant. The low-pass filter unit 300 may be configured without a coil.
    Type: Application
    Filed: January 29, 2018
    Publication date: March 12, 2020
    Applicant: ROHM CO., LTD.
    Inventors: Hiroto OSHITA, Tetsuo Tateishi, Yosuke Fukumoto, Yuhei Yamaguchi, Yoju IMAMURA, Genki Tsuruyama
  • Patent number: 10491099
    Abstract: A switching regulator control circuit is used in a switching regulator that converts an input voltage into an output voltage by the switching of a switching device, and generates a switching signal for controlling the ON/OFF operation of the switching device. The switching regulator control circuit has a fault detector and a fault protector. The fault detector detects, based on the duty ratio of the switching signal or a variable correlated to it and included in a control signal used to generate the switching signal, a fault state where the duty ratio falls outside the normal modulation range. The fault protector stops the switching of the switching device when the fault detector detects a fault state.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: November 26, 2019
    Assignee: Rohm Co., Ltd.
    Inventors: Yuhei Yamaguchi, Tetsuo Tateishi
  • Publication number: 20190296601
    Abstract: A motor includes a rotor including a shaft centered on a vertically extending center axis, a stator radially opposite to the rotor and including coils, a bearing supporting the shaft, and a bus bar unit on an upper side in an axial direction of the stator. The bus bar unit includes bus bars including a terminal portion connected to a lead wire drawn out from the coil and a bus bar holder holding the bus bars. The terminal portion includes a slit which extends axially downward and into which the lead wire is fitted. The width of the slit is narrower than the diameter of the lead wire.
    Type: Application
    Filed: August 25, 2017
    Publication date: September 26, 2019
    Inventors: Yuhei YAMAGUCHI, Ryusuke SATO, Hisashi FUJIHARA, Keigo NAKAMURA
  • Publication number: 20190267655
    Abstract: To provide an electrolyte membrane that exhibits high proton conductivity even at low humidity, the electrolyte membrane includes a composite membrane including: a microporous polyolefin membrane that has an average pore diameter of 1 to 1000 nm and a porosity of 50 to 90% and that can be impregnated with a solvent having a surface free energy of 28 mJ/m2 or more, and an electrolyte containing a perfluorosulfonic acid polymer having an EW of 250 to 850 loaded into the pores of the microporous polyolefin membrane, wherein the membrane thickness of the composite membrane is 1 to 20 ?m.
    Type: Application
    Filed: May 31, 2017
    Publication date: August 29, 2019
    Applicants: TOKYO INSTITUTE OF TECHNOLOGY, TEIJIN LIMITED, KANAGAWA INSTITUTE OF INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Takeo YAMAGUCHI, Yuhei OSHIBA, Hidenori OHASHI, Jin TOMATSU, Koji FURUYA, Takao OHNO, Mami NANBU
  • Patent number: 10355589
    Abstract: In a switching regulator, a first switch and a second switch are turned ON and OFF complementarily according to an output voltage. In a step-up/down mode, a third switch and a fourth switch are turned ON and OFF complementarily while the ON-duty D of the third switch is kept fixed.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: July 16, 2019
    Assignee: Rohm Co., Ltd.
    Inventors: Tetsuo Tateishi, Yuhei Yamaguchi, Shingo Hashiguchi, Kiyotaka Umemoto
  • Patent number: 10336859
    Abstract: The method for preparing an electrolyte capacitor includes: providing an oxidant dopant agent for preparing the conductive polymer including: ferric naphthalenesulfonate; and at least one compound selected from the group consisting of phosphate, phosphite, borate, thiophosphate, and dithiophosphate. The method also includes preparing a conductive polymer by using the oxidant dopant agent to obtain an electrolyte comprising the conductive polymer.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: July 2, 2019
    Assignee: TAYCA CORPORATION
    Inventors: Ryosuke Sugihara, Taichi Yamaguchi, Yuhei Tsurumoto
  • Patent number: 10298130
    Abstract: A switching regulator for generating an output voltage from an input voltage includes a first to fourth switches and is configured to fix an on-duty ratio of the third switch in a step-up/down mode. The switching regulator performs current mode control according to the information of current flowing through the second switch. A step-down control circuit includes a slope voltage generation part that generates a slope voltage, and generates a step-down control signal according to the slope voltage. The slope voltage generation part switches between a first operation of combining a first ramp voltage to stored information of the current to generate the slope voltage and a second operation of combining a second ramp voltage having a slope smaller than a slope of the first ramp voltage to stored information of the current to generate the slope voltage.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: May 21, 2019
    Assignee: Rohm Co., Ltd.
    Inventors: Yuhei Yamaguchi, Tetsuo Tateishi
  • Publication number: 20190115914
    Abstract: A diving circuit drives an output transistor according to a control signal SCTRL. The gate of the first transistor is biased. The source of the first transistor is coupled to an internal line. In the on period of the output transistor, the voltage of the internal line is applied to a control electrode of the output transistor. A voltage correction circuit controls the internal line so as to gradually lower the voltage VREGB of the internal line with time.
    Type: Application
    Filed: October 4, 2018
    Publication date: April 18, 2019
    Inventors: Tetsuo TATEISHI, Hiroto OSHITA, Yuhei YAMAGUCHI