Patents by Inventor Hiroyuki Yoshikawa

Hiroyuki Yoshikawa 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: 11975778
    Abstract: An information processing apparatus disclosed has a controller configured to execute the processing of accepting a request for retrieving a target vehicle body unit that is laid at a specific place, selecting a chassis unit for retrieval from among chassis units in the state separated from any vehicle body unit, the chassis unit for retrieval being a chassis unit to be used to retrieve the target vehicle body unit, and sending a retrieval command to the chassis unit for retrieval, the retrieval command being a command to retrieve the target vehicle body unit.
    Type: Grant
    Filed: February 3, 2021
    Date of Patent: May 7, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsuhisa Yoshikawa, Yuji Suzuki, Keita Yamazaki, Kei Matsumoto, Hiroyuki Ito, Takashi Ogawa, Yukiya Sugiyama, Masaru Ando, Yasushi Fujiwara, Azusa Nakagame, Erina Toyama
  • Publication number: 20240132738
    Abstract: The present invention provides a polymeric dispersant that is to be blended in an aqueous pigment dispersion in which a pigment is finely dispersed in a stable manner and at a high level, the aqueous pigment dispersion enabling preparation of an aqueous inkjet ink capable of recording an image excellent in adhesiveness and durability on plastic media and textiles. The polymeric dispersant is a polymer that includes a constituent unit (i) derived from styrene, a constituent unit (ii) derived from methyl methacrylate and/or the like, a constituent unit (iii) derived from 2-ethylhexyl methacrylate and/or the like, a constituent unit (iv) derived from 2-hydroxyethyl methacrylate and/or the like, and a constituent unit (v) derived from methacrylic acid, and at least part of carboxy groups is neutralized with an alkali.
    Type: Application
    Filed: November 26, 2021
    Publication date: April 25, 2024
    Inventors: Hiroyuki SHIMANAKA, Katsuhiko KANO, Kosuke KUME, Chikako MIYAZAKI, Yoshikazu MURAKAMI, Sachio YOSHIKAWA
  • Publication number: 20240112571
    Abstract: A congestion prediction device, a congestion prediction method, and a storage medium are provided. A mapping outputs an output variable when input variables are input to the mapping. The output variable indicates a degree of congestion in a predetermined specific area. The mapping is learned in advance by machine learning. The input variables include congestion variables. Each of the congestion variables indicates a degree of congestion in the specific area at regular time intervals within a specific period. The output variable indicates a degree of congestion after a lapse of the regular time interval from an end time of the specific period.
    Type: Application
    Filed: September 26, 2023
    Publication date: April 4, 2024
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ayumu SHIOMI, Atsushi MIYAGAWA, Hiroki TAKEUCHI, Toshiyuki KAWAI, Ryosuke FUKAYA, Hiroyuki TOKITA, Yusuke IKENOUE, Tsukasa KATO, Katsuhisa YOSHIKAWA, Yuta ICHIJYO, Takayuki AKAISHI, Shintaro KAWAI
  • Publication number: 20240101844
    Abstract: There is provided an aqueous pigment dispersion that makes it possible to prepare an environmentally conscious aqueous inkjet ink in which a pigment is finely dispersed in a stable manner and at a high level and which is capable of recording an image having excellent durability, glossiness, color developability, and adhesiveness to various printing substrates. The aqueous pigment dispersion is an aqueous pigment dispersion containing a pigment, water, a water-soluble organic solvent, and a polymeric dispersant that disperses the pigment, wherein the polymeric dispersant is a polymer including a constitutional unit (i) derived from at least one of (meth)acrylic acid and itaconic acid, and a constituent unit (ii) derived from a (meth)acrylate derived from biological material, such as ethyl (meth)acrylate, having an acid value of 30 to 250 mgKOH/g, having a number average molecular weight of 1,000 to 30,000, and having a polydispersity index (weight average molecular weight/number average molecular weight) of 2.
    Type: Application
    Filed: September 16, 2021
    Publication date: March 28, 2024
    Inventors: Hiroyuki SHIMANAKA, Jun KAMABAYASHI, Sachio YOSHIKAWA, Toshie OKUBO, Lu TIAN, Akifumi TANAKA
  • Patent number: 11940750
    Abstract: Paper physical property detecting device includes a first detector that measures a sheet of paper (hereinafter, merely referred to as a paper) made to stop temporarily on a conveyance path and acquires a first value corresponding to a first physical property, a second detector that measures a paper while conveying the paper on the conveyance path and acquires a second value corresponding to a second physical property with regard to a physical property different from the first physical property; and a corrector that corrects the first value on a basis of the second value and creates post correction data.
    Type: Grant
    Filed: October 18, 2022
    Date of Patent: March 26, 2024
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hiroyuki Yoshikawa, Hitoshi Asano, Yumiko Izumiya, Yasuhiro Koide
  • Publication number: 20230370556
    Abstract: A recording material determination device, includes: a conveyor that conveys recording materials along a conveyance path; a detector that is provided at a middle of the conveyance path, and detects a characteristic value of each of the recording materials in conveyance; and a hardware processor that controls driving of the conveyor, stops a first recording material among the recording materials at the detector, and does not stop a second recording material that is conveyed after the first recording material, wherein the hardware processor determines whether the second recording material changes with respect to the first recording material, based on a first characteristics detection result of the first recording material detected by the detector, and on a second characteristics detection result of the second recording material detected by the detector.
    Type: Application
    Filed: May 12, 2023
    Publication date: November 16, 2023
    Applicant: KONICA MINOLTA, INC.
    Inventors: Yumiko IZUMIYA, Hitoshi ASANO, Yasuhiro KOIDE, Hiroyuki YOSHIKAWA
  • Publication number: 20230176515
    Abstract: Paper physical property detecting device includes a first detector that measures a sheet of paper (hereinafter, merely referred to as a paper) made to stop temporarily on a conveyance path and acquires a first value corresponding to a first physical property, a second detector that measures a paper while conveying the paper on the conveyance path and acquires a second value corresponding to a second physical property with regard to a physical property different from the first physical property; and a corrector that corrects the first value on a basis of the second value and creates post correction data.
    Type: Application
    Filed: October 18, 2022
    Publication date: June 8, 2023
    Applicant: Konica Minolta, Inc.
    Inventors: Hiroyuki YOSHIKAWA, Hitoshi ASANO, Yumiko IZUMIYA, Yasuhiro KOIDE
  • Publication number: 20230154651
    Abstract: Disclosed is a covered wire including: a tubular member through which a coolant flows; a conductor provided on an outer circumference of the tubular member; and a covering member covering an outer circumference of the conductor, wherein the tubular member and the covering member are insulating, and the tubular member has a higher resistance to the coolant than the covering member.
    Type: Application
    Filed: April 27, 2021
    Publication date: May 18, 2023
    Inventors: Kenta KOBAYASHI, Takeo MARUCHI, Hiroyuki YOSHIKAWA
  • Publication number: 20230008381
    Abstract: A rotation detector includes a motor, a current detector and a hardware processor. The motor includes coils of two or more phases and a rotor. The current detector detects currents flowing in coils of at least two phases among the coils of two or more phases. The hardware processor estimates an initial position of the rotor based on current values of the currents detected by the current detector to start the motor, controls an energization pattern on the phases to rotate and start the motor based on the estimated initial position, and determines whether the rotor stops or is rotating before completing the estimation of the initial position.
    Type: Application
    Filed: June 30, 2022
    Publication date: January 12, 2023
    Applicant: Konica Minolta, Inc.
    Inventors: Yuta TACHIBANA, Hiroyuki YOSHIKAWA, Kazumichi YOSHIDA, Satoshi MIYAJIMA, Kouei CHO
  • Patent number: 11387758
    Abstract: A motor controller estimates an initial position of a magnetic pole of a rotor of a brushless DC motor in an inductive sensing scheme. The motor controller controls a drive circuit to apply an AC voltage to a stator winding at a first energization angle, and subsequently to apply an AC voltage to the stator winding at a second energization angle before a residual current flowing through the stator winding returns to zero. At each energization angle, the motor controller corrects a peak value of a current in the stator winding based on the residual current detected immediately before a voltage is applied to the stator winding or at a time when voltage application to the stator winding is started. Based on the corrected peak value, the control circuit estimates the initial position of the magnetic pole of the rotor.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: July 12, 2022
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hiroyuki Yoshikawa, Yuta Tachibana, Daichi Suzuki
  • Patent number: 11233471
    Abstract: A control circuit of a motor control device estimates an initial magnetic pole position of a rotor using an inductive sensing scheme. When estimating the initial magnetic pole position, a drive circuit applies a voltage to a stator winding at each of L electrical angles (L?5) while changing the L electrical angles. An absolute value of an electrical angle difference of the voltage applied to the stator winding between an i-th time (2?i?L) and an i?1st time is 180?360/L degrees or more and 180+360/L degrees or less. An absolute value of an electrical angle difference of the voltage applied to the stator winding between a 1st time for initial position estimation and a last time before starting initial position estimation is 180?360/L degrees or more and 180+360/L degrees or less.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: January 25, 2022
    Assignee: KONICA MINOLTA, INC.
    Inventors: Daichi Suzuki, Yuji Kobayashi, Kazumichi Yoshida, Harumitsu Fujimori, Yuta Tachibana, Hiroyuki Yoshikawa
  • Patent number: 11223309
    Abstract: In a motor control device that controls a sensorless-type motor, a controller estimates an initial magnetic pole position of a rotor of a motor by an inductive sensing scheme while sequentially setting a plurality of energization angles. At each of the set energization angles, the controller converts peak values of currents flowing through a plurality of phases of a stator winding into a first current component having an electrical angle that is equal to a corresponding one of the set energization angles and a second current component that is different in electrical angle by 90 degrees from the first current component, to correct the first current component based on the second current component. The controller estimates the initial magnetic pole position of the rotor based on the corrected first current component that is obtained at each of the set energization angles.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: January 11, 2022
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hiroyuki Yoshikawa, Yuta Tachibana, Yuji Kobayashi, Kazumichi Yoshida, Daichi Suzuki, Harumitsu Fujimori
  • Patent number: 11218101
    Abstract: In a motor control device in one embodiment, an initial position estimation unit estimates an initial position of a magnetic pole of a rotor of a motor in an inductive sensing scheme. At each of energization angles, the initial position estimation unit multiplies a ?-axis current component I? corresponding to a peak value of a current flowing through a stator winding by each of a cosine value and a sine value of a correction angle obtained by correcting each of the energization angles. The initial position estimation unit estimates the initial position of the magnetic pole of the rotor based on a ratio between an integrated value of a multiplication result about the cosine value and an integrated value of a multiplication result about the sine value.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: January 4, 2022
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yuta Tachibana, Hiroyuki Yoshikawa, Yuji Kobayashi, Kazumichi Yoshida, Daichi Suzuki, Harumitsu Fujimori
  • Patent number: 11152879
    Abstract: In a motor control device, when estimating an initial position of a magnetic pole of a rotor of a motor, a drive circuit continuously or intermittently applies a voltage to a stator winding at each of a plurality of energization angles while sequentially changing the energization angles, and at a voltage value and for an energization time period, the voltage value and the energization time period being set such that the rotor does not rotate. An initial position estimation unit calculates an estimated initial position of the magnetic pole of the rotor based on a phase angle of a trigonometric function curve that approximates a change of a ?-axis current I? with respect to each of the energization angles. The trigonometric function curve has a cycle equal to one electrical cycle of the motor.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: October 19, 2021
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yuta Tachibana, Hiroyuki Yoshikawa, Daichi Suzuki
  • Patent number: 10942127
    Abstract: The present invention provide a method for detecting a test substance utilizing a color development caused by an enzyme reaction, or a color development caused by a specific interaction such as an antigen-antibody reaction and an enzyme reaction, the test substance being detected rapidly, sensitively and quantitatively without using a spectroscopic measurement device. The method for measuring a concentration of a test substance by the present invention comprises the steps of: generating a peroxide from the test substance; obtaining a polymerized substance by bringing an oxidoreductase for producing a polymerized substance and a substrate of the oxidoreductase for producing a polymerized substance into contact with the peroxide; and irradiating the polymerized substance with light to record a temporal variation information of an intensity of scattered light generated from an irradiation point.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: March 9, 2021
    Assignee: OSAKA UNIVERSITY
    Inventors: Hiroyuki Yoshikawa, Eiichi Tamiya, Shuhei Imura
  • Patent number: 10790767
    Abstract: A control device of a permanent magnet synchronous motor that is a control device of a sensorless-type permanent magnet synchronous motor in which a rotor using a permanent magnet rotates by a rotating magnetic field caused by a current flowing in an armature includes: a driver that applies a voltage to the armature and drives the rotor; an initial position estimator that estimates an initial position which is a magnetic pole position of the rotor that is stopped; and a controller that controls the driver so as to apply a pulse train including a voltage pulse for searching the initial position for each of n angle positions dividing a search range of an electrical angle of 360 degrees to the armature, wherein the pulse train includes a first pulse and a second pulse.
    Type: Grant
    Filed: May 2, 2019
    Date of Patent: September 29, 2020
    Assignee: Konica Minolta, Inc.
    Inventors: Hiroyuki Yoshikawa, Daichi Suzuki, Yuta Tachibana
  • Publication number: 20200295689
    Abstract: In a motor control device in one embodiment, an initial position estimation unit estimates an initial position of a magnetic pole of a rotor of a motor in an inductive sensing scheme. At each of energization angles, the initial position estimation unit multiplies a ?-axis current component I? corresponding to a peak value of a current flowing through a stator winding by each of a cosine value and a sine value of a correction angle obtained by correcting each of the energization angles. The initial position estimation unit estimates the initial position of the magnetic pole of the rotor based on a ratio between an integrated value of a multiplication result about the cosine value and an integrated value of a multiplication result about the sine value.
    Type: Application
    Filed: March 11, 2020
    Publication date: September 17, 2020
    Inventors: Yuta TACHIBANA, Hiroyuki YOSHIKAWA, Yuji KOBAYASHI, Kazumichi YOSHIDA, Daichi SUZUKI, Harumitsu FUJIMORI
  • Publication number: 20200295688
    Abstract: In a motor control device that controls a sensorless-type motor, a controller estimates an initial magnetic pole position of a rotor of a motor by an inductive sensing scheme while sequentially setting a plurality of energization angles. At each of the set energization angles, the controller converts peak values of currents flowing through a plurality of phases of a stator winding into a first current component having an electrical angle that is equal to a corresponding one of the set energization angles and a second current component that is different in electrical angle by 90 degrees from the first current component, to correct the first current component based on the second current component. The controller estimates the initial magnetic pole position of the rotor based on the corrected first current component that is obtained at each of the set energization angles.
    Type: Application
    Filed: February 18, 2020
    Publication date: September 17, 2020
    Applicant: KONICA MINOLTA, INC.
    Inventors: Hiroyuki YOSHIKAWA, Yuta TACHIBANA, Yuji KOBAYASHI, Kazumichi YOSHIDA, Daichi SUZUKI, Harumitsu FUJIMORI
  • Publication number: 20200266745
    Abstract: In a motor control device, when estimating an initial position of a magnetic pole of a rotor of a motor, a drive circuit continuously or intermittently applies a voltage to a stator winding at each of a plurality of energization angles while sequentially changing the energization angles, and at a voltage value and for an energization time period, the voltage value and the energization time period being set such that the rotor does not rotate. An initial position estimation unit calculates an estimated initial position of the magnetic pole of the rotor based on a phase angle of a trigonometric function curve that approximates a change of a ?-axis current I? with respect to each of the energization angles. The trigonometric function curve has a cycle equal to one electrical cycle of the motor.
    Type: Application
    Filed: February 10, 2020
    Publication date: August 20, 2020
    Applicant: KONICA MINOLTA, INC.
    Inventors: Yuta TACHIBANA, Hiroyuki YOSHIKAWA, Daichi SUZUKI
  • Publication number: 20200253173
    Abstract: The present invention provides fish with promoted growth. The fish according to the present invention has loss of function of a melanocortin-4 receptor (MC4R) gene.
    Type: Application
    Filed: September 28, 2018
    Publication date: August 13, 2020
    Inventors: Masato KINOSHITA, Yasutoshi YOSHIURA, Hiroyuki YOSHIKAWA, Keitaro KATO