Patents by Inventor Kazuo Hasegawa

Kazuo Hasegawa 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: 20200256995
    Abstract: A laser radar device includes: a light source; a projection light scanner that scans one part of light split off from emission light of the light source, and that generates transmission light for radiating onto a target object; an image forming section that forms plural respective reception lights of the transmission light reflected by respective locations of the target object into an image on a single flat plane as plural image-formation points; an optical receiver that is disposed at the plural image-formation points, and that includes plural unit optical reception sections for mixing each of the plural reception lights together with a reference light and performing optical heterodyne detection; and a reference light scanner that scans or distributes another light split off from the emission light from the light source, and that generates the reference light for radiating onto each of plural of the unit optical reception sections.
    Type: Application
    Filed: November 18, 2015
    Publication date: August 13, 2020
    Inventors: Daisuke INOUE, Tadashi ICHIKAWA, Tatsuya YAMASHITA, Akari NAKAO, Kazuo HASEGAWA
  • Patent number: 10739457
    Abstract: A laser radar device includes: a light source; a projection light scanner that scans one part of light split off from emission light of the light source, and that generates transmission light for radiating onto a target object; an image forming section that forms plural respective reception lights of the transmission light reflected by respective locations of the target object into an image on a single flat plane as plural image-formation points; an optical receiver that is disposed at the plural image-formation points, and that includes plural unit optical reception sections for mixing each of the plural reception lights together with a reference light and performing optical heterodyne detection; and a reference light scanner that scans or distributes another light split off from the emission light from the light source, and that generates the reference light for radiating onto each of plural of the unit optical reception sections.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: August 11, 2020
    Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Daisuke Inoue, Tadashi Ichikawa, Tatsuya Yamashita, Akari Nakao, Kazuo Hasegawa
  • Publication number: 20200209194
    Abstract: A concentration measuring instrument includes a piezoelectric vibrator transmitting an ultrasonic wave into a solution contained in a cavity and detecting the ultrasonic wave reflected, a temperature sensor measuring a temperature of the solution, a drive circuit generating a drive signal driving the piezoelectric vibrator, a phase comparator performing a phase comparison between the drive signal and a detection signal, a frequency setting circuit making the drive circuit generate drive signals having sequentially different frequencies and monitoring a phase comparison result to detect a resonant frequency, and a Phase Locked Loop (PLL) circuit making a frequency of the drive signal follow the detected resonant frequency. A microcomputer determines a concentration of a solute in the solution on a basis of the frequency of the drive signal while the PLL circuit is being operated and a result of a temperature measurement by the temperature sensor.
    Type: Application
    Filed: March 6, 2020
    Publication date: July 2, 2020
    Applicant: Tyco Electronics Japan G.K.
    Inventors: Tsuyoshi Tanaka, Heewon Jeong, Kazuo Hasegawa
  • Patent number: 10693273
    Abstract: A reflector includes a gain fiber and a periodic refraction structure unit. The gain fiber has a core doped with a rare earth element. The periodic refraction structure unit includes a high-refractive-index region that has a predetermined width, that is formed at a predetermined spacing along an optical axis direction of the gain fiber, that is formed across an entire section of the core that is orthogonal to the optical axis of the core, and that has a first refractive index, and a low-refractive-index region that is formed adjacent to the high-refractive-index region, that has a width equal to the predetermined spacing, and that has a second refractive index lower than the first refractive index. A width di of an ith periodic structure of refractive index in the periodic refraction structure unit is given by the equation di=Hi·(?/(2·ni))+?/(4·ni).
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: June 23, 2020
    Assignees: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHA, TOYOTA SCHOOL FOUNDATION
    Inventors: Kazuo Hasegawa, Satoru Kato, Tomoya Okazaki, Kazuya Saito
  • Publication number: 20200168939
    Abstract: A fuel cell monitoring device includes: an impedance measuring part measuring an impedance at each fuel cell and an impedance at a fuel cell stack as a whole; a water content estimating part calculating a water content estimated value at each fuel cell using a gas diffusion resistance obtained from a measurement result about the impedance at each fuel cell, and calculating a water content reference estimated value indicating a water content in each fuel cell using a gas diffusion resistance obtained from a measurement result about the impedance at the fuel cell stack as a whole; and a determining part detecting at least either the occurrence of deterioration of catalyst in the fuel cell or the occurrence of a distribution failure of reactive gas at the fuel cell by determining based on the magnitude of the water content estimated value relative to the water content reference estimated value.
    Type: Application
    Filed: October 25, 2019
    Publication date: May 28, 2020
    Inventors: Chiaki MIZUTANI, Ikuyasu KATO, Miho HATAZAKI, Kazuo YAMAMOTO, Shigeki HASEGAWA
  • Publication number: 20200144638
    Abstract: A fuel cell system includes: a fuel cell; a voltage detector; a current detector; an alternating current signal supply unit; a phase difference calculation unit configured to calculate, based on detected alternating voltage and detected alternating current, a phase difference between the detected alternating current and the detected alternating voltage; and an estimation unit configured to estimate, in accordance with the phase difference, an electric power generation distribution feature amount representing an electric power generation distribution in a cell surface of the fuel cell, with use of a predetermined relationship between the electric power generation distribution feature amount and the phase difference. The electric power generation distribution feature amount includes a value indicating a difference between a maximum value and a minimum value of local current density in the cell surface.
    Type: Application
    Filed: October 18, 2019
    Publication date: May 7, 2020
    Inventors: Chiaki MIZUTANI, Shigeki HASEGAWA, Kazuo YAMAMOTO
  • Publication number: 20200035984
    Abstract: Provided is a method for producing an electrode for solid-state batteries which comprises a PTC resistor layer containing an insulating inorganic substance and in which electronic resistance is low. The production method is a method for producing an electrode for solid-state batteries, wherein the method is a method for producing an electrode for use in a solid-state battery comprising a cathode, an anode and an electrolyte layer disposed between the cathode and the anode; wherein the electrode is at least one of the cathode and the anode, and the electrode comprises a current collector, an electrode active material layer and a PTC resistor layer disposed between the current collector and the electrode active material layer.
    Type: Application
    Filed: July 23, 2019
    Publication date: January 30, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Norihiro OSE, Tomoya SUZUKI, Hajime HASEGAWA, Kazuo YASO, Hideaki NISHIMURA, Yuki MATSUSHITA
  • Publication number: 20200035988
    Abstract: An electrode for solid-state batteries, comprising a PTC resistor layer, and a solid-state battery comprising the electrode. The electrode may be an electrode for solid-state batteries, wherein the electrode comprises an electrode active material layer, a current collector and a PTC resistor layer which is disposed between the electrode active material layer and the current collector and which is in contact with the electrode active material layer; wherein the PTC resistor layer contains an electroconductive material, an insulating inorganic substance and a polymer; and wherein a surface roughness Ra of an electrode active material layer-contacting surface of the PTC resistor layer, is 1.1 ?m or less.
    Type: Application
    Filed: July 23, 2019
    Publication date: January 30, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Norihiro OSE, Tomoya SUZUKI, Hajime HASEGAWA, Kazuo YASO, Hideaki NISHIMURA, Yuki MATSUSHITA
  • Publication number: 20200035990
    Abstract: An electrode for solid-state batteries, comprising a PTC resistor layer, and a solid-state battery comprising the electrode. The electrode may be an electrode for solid-state batteries, wherein the electrode comprises an electrode active material layer, a current collector and a PTC resistor layer disposed between the electrode active material layer and the current collector; wherein the PTC resistor layer contains an electroconductive material, an insulating inorganic substance and a polymer; and wherein a porosity of the PTC resistor layer is from 5% to 13%.
    Type: Application
    Filed: July 23, 2019
    Publication date: January 30, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Norihiro OSE, Tomoya SUZUKI, Hajime HASEGAWA, Kazuo YASO, Hideaki NISHIMURA, Yuki MATSUSHITA
  • Publication number: 20200036009
    Abstract: An electrode for solid-state batteries, comprising a PTC resistor layer, and a solid-state battery comprising the electrode. The electrode may be an electrode for solid-state batteries, wherein the electrode comprises an electrode active material layer, a current collector and a PTC resistor layer which is disposed between the electrode active material layer and the current collector and which is in contact with the electrode active material layer; wherein the PTC resistor layer contains an electroconductive material, an insulating inorganic substance and a polymer.
    Type: Application
    Filed: July 17, 2019
    Publication date: January 30, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Norihiro OSE, Tomoya SUZUKI, Hajime HASEGAWA, Kazuo YASO, Hideaki NISHIMURA, Yuki MATSUSHITA
  • Publication number: 20200035983
    Abstract: An electrode for solid-state batteries, comprising a PTC resistor layer, and a solid-state battery comprising the electrode. The electrode may be an electrode for solid-state batteries, wherein the electrode comprises an electrode active material layer, a current collector and a PTC resistor layer which is disposed between the electrode active material layer and the current collector and which is in contact with the electrode active material layer; wherein the PTC resistor layer contains a carbon-containing electroconductive material, an insulating inorganic substance and a fluorine-containing polymer.
    Type: Application
    Filed: July 23, 2019
    Publication date: January 30, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Norihiro OSE, Tomoya SUZUKI, Hajime HASEGAWA, Kazuo YASO, Hideaki NISHIMURA, Yuki MATSUSHITA
  • Publication number: 20200035989
    Abstract: Provided is a method for producing an electrode for solid-state batteries, which comprises a PTC resistor layer and in which electronic resistance is low. The production method is a method for producing an electrode for solid-state batteries, wherein the method is a method for producing an electrode for use in a solid-state battery comprising a cathode, an anode and an electrolyte layer disposed between the cathode and the anode; wherein the electrode is at least one of the cathode and the anode, and the electrode comprises a current collector, an electrode active material layer and a PTC resistor layer disposed between the current collector and the electrode active material layer.
    Type: Application
    Filed: July 23, 2019
    Publication date: January 30, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Norihiro Ose, Tomoya Suzuki, Hajime Hasegawa, Kazuo Yaso, Hideaki Nishimura, Yuki Matsushita
  • Publication number: 20200006792
    Abstract: Provided is a fuel cell system including: a fuel cell; a reactant gas supply section; a converter; an alternating-current superimposing unit; a phase difference deriving unit configured to derive a phase difference that is a phase lag of an alternating-current voltage relative to an alternating current in an alternating-current component output from the fuel cell; and a first inference unit. The first inference unit infers that the fuel cell is in an inappropriate wet state, when the absolute value of an amount of change in the phase difference has become equal to or larger than a predetermined criterion value immediately after the magnitude of a change in the value of at least one of parameters that are a flow rate of a reactant gas, a stoichiometric ratio, and an output current has exceeded a predetermined criterion.
    Type: Application
    Filed: June 28, 2019
    Publication date: January 2, 2020
    Inventors: Chiaki MIZUTANI, Shigeki HASEGAWA, Kazuo YAMAMOTO
  • Publication number: 20190260042
    Abstract: Provided is a fuel cell system including: a pressure measurement unit that acquires a measured pressure value of an anode gas at an anode gas inlet or an anode gas outlet of a fuel cell; and a water amount estimation unit. The water amount estimation unit obtains, from a plurality of circumstantial parameters including an open time of an injector provided in the anode gas supply passage and the measured pressure value measured before the injector is opened, an assumed pressure rise that is assumed based on the water amount being equal to the water amount threshold value. When a measured pressure rise of the measured pressure value resulting from opening the injector is larger than the assumed pressure rise, the water amount estimation unit estimates that the water amount is larger than the water amount threshold value.
    Type: Application
    Filed: February 7, 2019
    Publication date: August 22, 2019
    Inventors: Kazuo YAMAMOTO, Shigeki HASEGAWA
  • Patent number: 10331571
    Abstract: An address control circuit includes a setting terminal connectable to a ground potential, a time constant setting circuit connected to the setting terminal, and a control unit connected to the time constant setting circuit and configured to set an address for serial communication. The time constant setting circuit includes a resistive element disposed between the setting terminal and the control unit and configured to protect the control unit against overvoltage. The control unit outputs a voltage to the time constant setting circuit, and sets an address at a predetermined timing based on the voltage input from the time constant setting circuit when a predetermined time has passed after the output of the voltage is stopped.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: June 25, 2019
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Kazuo Takada, Shigeki Miyaji, Yoshiaki Motoyama, Yasuyuki Hasegawa
  • Publication number: 20190089112
    Abstract: A reflector includes a gain fiber and a periodic refraction structure unit. The gain fiber has a core doped with a rare earth element. The periodic refraction structure unit includes a high-refractive-index region that has a predetermined width, that is formed at a predetermined spacing along an optical axis direction of the gain fiber, that is formed across an entire section of the core that is orthogonal to the optical axis of the core, and that has a first refractive index, and a low-refractive-index region that is formed adjacent to the high-refractive-index region, that has a width equal to the predetermined spacing, and that has a second refractive index lower than the first refractive index. A width di of an ith periodic structure of refractive index in the periodic refraction structure unit is given by the equation di=Hi·(?/(2·ni))+?/(4·ni).
    Type: Application
    Filed: September 6, 2018
    Publication date: March 21, 2019
    Applicants: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHA, TOYOTA SCHOOL FOUNDATION
    Inventors: Kazuo HASEGAWA, Satoru KATO, Tomoya OKAZAKI, Kazuya SAITO
  • Publication number: 20180345404
    Abstract: A laser processing device includes: a laser source; a collimator that collimates light generated by the laser source; an optical element including a converter that converts the collimated light into a beam of light that includes a plurality of collimated lights which respectively have optical axes that are different from each other and that transmits the beam of light; and a focusing element that focuses the beam of light onto a workpiece.
    Type: Application
    Filed: October 27, 2016
    Publication date: December 6, 2018
    Applicants: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuo HASEGAWA, Satoru KATO, Chie TOYODA, Tomoya OKAZAKI, Yoshinori SHIBATA, Yuta FUJIKASA
  • Publication number: 20180333807
    Abstract: A laser processing device includes plural laser sources and a focusing section that focuses respective light beams of the plural laser sources to form plural focus points on a workpiece, and that focuses such that respective portions of at least some of the plural focus points are overlapping.
    Type: Application
    Filed: March 17, 2017
    Publication date: November 22, 2018
    Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Kazuo HASEGAWA, Satoru KATO, Tadashi ICHIKAWA, Masatoshi YONEMURA
  • Patent number: 9817121
    Abstract: A radar apparatus which can simply determine the sign of velocity of an object is provided. Laser light reflected by the object undergoes quadrature optical heterodyne detection performed by mixers, optical detectors, and a ?/2 phase shifter, whereby I and Q component signals are output. A frequency analyzer performs FFT on a complex signal composed of the I component signal (real part) and the Q component signal (imaginary part) to thereby obtain its frequency spectrum. Since the frequency spectrum is calculated without being folded back even in a region where the frequency is negative, the sign of the Doppler frequency fd can be determined. When the Doppler frequency fd is positive, the sign of the velocity of the object is a direction toward the radar apparatus. When the Doppler frequency fd is negative, the sign of the velocity of the object is a direction away from the radar apparatus.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: November 14, 2017
    Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Daisuke Inoue, Tatsuya Yamashita, Tadashi Ichikawa, Satoru Kato, Kazuo Hasegawa
  • Publication number: 20150185244
    Abstract: A radar apparatus which can simply determine the sign of velocity of an object is provided. Laser light reflected by the object undergoes quadrature optical heterodyne detection performed by mixers, optical detectors, and a ?/2 phase shifter, whereby I and Q component signals are output. A frequency analyzer performs FFT on a complex signal composed of the I component signal (real part) and the Q component signal (imaginary part) to thereby obtain its frequency spectrum. Since the frequency spectrum is calculated without being folded back even in a region where the frequency is negative, the sign of the Doppler frequency fd can be determined. When the Doppler frequency fd is positive, the sign of the velocity of the object is a direction toward the radar apparatus. When the Doppler frequency fd is negative, the sign of the velocity of the object is a direction away from the radar apparatus.
    Type: Application
    Filed: December 23, 2014
    Publication date: July 2, 2015
    Inventors: Daisuke INOUE, Tatsuya YAMASHITA, Tadashi ICHIKAWA, Satoru KATO, Kazuo HASEGAWA