Patents by Inventor Kiwamu Kobayashi

Kiwamu Kobayashi 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: 10928460
    Abstract: A circuit is formed by connecting positive terminals and negative terminals of a power storage device and an external power supply, and a resistor and a switch are arranged in series between a positive-side conductor and a negative-side conductor. An ON time for which the switch is temporarily closed before start of inspection is made longer as the capacity of the power storage device is larger. An ON voltage between the positive-side and negative-side conductors within the ON time, and an OFF voltage between these conductors at a time other than the ON time are obtained, and a parasitic resistance value of the circuit is calculated based on the ON and OFF voltages and a resistance value of the resistor. During the inspection, the voltage of the external power supply, which is applied to the power storage device, is increased according to the parasitic resistance value.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: February 23, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takeshi Goto, Kiwamu Kobayashi
  • Publication number: 20210011087
    Abstract: A power storage device inspecting method of inspecting a power storage device for an internal short circuit includes: detecting an external resistance Re which is generated in an external circuit in a state in which probes of an external power supply are connected to external terminals of the power storage device; applying an initial output voltage VS(0) with which an initial device current IB(0) of a device current IB(t) is zero; applying an output voltage VS(t) expressed by Equation (1) from the external power supply to the power storage device; and determining an internal short circuit of the power storage device based on a change with time of the device current IB(t) or a stabilized device current IBs. VS(t)=VS(0)+(Re?Ro1)·IB(t)??(1) Here, a first virtual external resistance Ro1 is a constant satisfying 0<Ro1<Re.
    Type: Application
    Filed: April 20, 2020
    Publication date: January 14, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kiwamu KOBAYASHI, Takeshi GOTO, Naotaka IDE, Ruri TANAKA
  • Patent number: 10884064
    Abstract: An inspection apparatus including the power supply device, positive and negative conductive lines, connected to the power supply device and having corresponding first and second probes, at corresponding front ends, a resistor and a switch serially disposed between the positive conductive line and the negative conductive line, a circuit resistance calculation unit that calculates a circuit resistance value based on a difference in voltage between when the switch is turned off and turned on, an inspection unit configured to inspect the electrical storage device, and a virtual resistance setting unit that increases the output voltage after the start of inspection.
    Type: Grant
    Filed: January 2, 2019
    Date of Patent: January 5, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKT KAISHA
    Inventors: Kiwamu Kobayashi, Takeshi Goto
  • Publication number: 20200389573
    Abstract: The image processing system acquires a foreground mask from a captured image acquired by capturing an object with an image capturing unit whose exposure value is set relatively higher or lower than that of another image capturing unit, acquires an inappropriate area mask by detecting an area whose exposure value is inappropriate in the captured image, and generates shape data representing a three-dimensional shape of the object based on the foreground mask and the inappropriate area mask.
    Type: Application
    Filed: June 1, 2020
    Publication date: December 10, 2020
    Inventor: Kiwamu Kobayashi
  • Patent number: 10847849
    Abstract: An inspection method of an electrical storage device includes: setting a pseudo parasitic resistance value to be small in a case where a power storage capacity of the electrical storage device is large, while setting the pseudo parasitic resistance value to be large in the case where the power storage capacity is small; in a state where the pseudo parasitic resistance value is set, acquiring a current value after convergence of a current flowing through a circuit such that the circuit is formed by connecting an external power source to the charged electrical storage device in a direction where a voltage is applied thereto; and determining quality of the electrical storage device based on the current value.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: November 24, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takeshi Goto, Kiwamu Kobayashi
  • Patent number: 10845422
    Abstract: An electricity storage device tester including: a voltage application unit configured to apply to a circuit a direct-current voltage; an ammeter configured to acquire a current value of the circuit; a voltage control unit configured to control an output voltage of the voltage application unit; and a determination unit configured to determine whether the electricity storage device is defective or not based on the value acquired by the ammeter. The voltage application unit includes a plurality of power source devices connected in series with each other. One of the power source devices is a specific power source device which is configured to have a variable output voltage and of which both a maximum value and a step width of the output voltage are smaller than the power source devices other than the specific power source device.
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: November 24, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kiwamu Kobayashi, Takeshi Goto
  • Patent number: 10768238
    Abstract: A circuit is formed by connecting an external power source to a charged electrical storage device so that a polarity of a voltage of the external power source is reverse to a polarity of a voltage of the charged electrical storage device, and the voltage of the external power source is adjusted so that a current does not flow right after the connection. Then, current measurement to acquire a current value after convergence of the current flowing through the circuit due to a voltage drop of the electrical storage device and quality determination based on the current value after convergence are performed. In the current measurement, resistance measurement to actually measure a circuit resistance and prediction to predict a convergence timing of the current based on the actually measured circuit resistance are performed. The current value is acquired when a predicted convergence timing comes.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: September 8, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takeshi Goto, Kiwamu Kobayashi
  • Publication number: 20200167933
    Abstract: An image processing apparatus generates an image indicating a foreground area of a captured image, based on (i) a threshold value corresponding to both luminance difference between the captured image and a background image and luminance of one of the captured image and the background image, (ii) obtained luminance of one of the captured image and the background image, and (iii) obtained luminance difference between the captured image and the background image.
    Type: Application
    Filed: October 30, 2019
    Publication date: May 28, 2020
    Inventors: Akihiro Matsushita, Kiwamu Kobayashi
  • Patent number: 10666924
    Abstract: A virtual viewpoint image generation system generates a virtual viewpoint image based on a plurality of captured images obtained by capturing an image capturing target region from a plurality of different directions, and position information relating to a virtual viewpoint position. The system comprises: a plurality of image capturing apparatuses; a daisy-chain-type topology network; an obtainment unit configured to obtain the position information relating to the virtual viewpoint position; and a generation unit configured to generate the virtual viewpoint image based on the position information and the data based on each captured image of the plurality of image capturing apparatuses obtained via the daisy-chain-type topology network.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: May 26, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Akihiro Matsushita, Kiwamu Kobayashi
  • Patent number: 10656214
    Abstract: A circuit is formed by connecting an external power source to a charged electrical storage device so that a polarity of a voltage of the external power source is reverse to a polarity of a voltage of the charged electrical storage device, and the voltage of the external power source is adjusted so that a current does not flow right after the connection. Then, current measurement to acquire a current value after convergence of the current flowing through the circuit due to a voltage drop of the electrical storage device and quality determination based on the current value after convergence are performed. In the current measurement, resistance measurement to actually measure a circuit resistance and prediction to predict a convergence timing of the current based on the actually measured circuit resistance are performed. The current value is acquired when a predicted convergence timing comes.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: May 19, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takeshi Goto, Kiwamu Kobayashi
  • Patent number: 10656212
    Abstract: A method of inspecting an electric power storage device for a short circuit includes voltage measuring of measuring a pre-detection device voltage of the electric power storage device that is pre-charged, current detecting of detecting a temporal change in a current flowing to the electric power storage device from an external electric power supply or a stable current value of the current by continuously applying an output voltage equal to the pre-detection device voltage to the electric power storage device from the external electric power supply, and determining of determining an internal short circuit in the electric power storage device based on the detected temporal change in the current or the stable current value of the current.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: May 19, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kiwamu Kobayashi, Takeshi Goto
  • Publication number: 20200143582
    Abstract: An image processing apparatus 200 includes: a first saturation information obtaining unit 306 configured to obtain saturation of a frame image; a second saturation information obtaining unit 309 configured to obtain saturation of a background image; and a threshold value determining unit 311 configured to determine a threshold value, which is used for checking a difference in color information, for each pixel, based on the saturation obtained by each of the first saturation information obtaining unit 306 and the second saturation information obtaining unit 309. A hue foreground area estimating unit 312 is configured to estimate a foreground area by use of the threshold value determined by the threshold value determining unit 311 as well as color information of the frame image and color information of the background image.
    Type: Application
    Filed: October 7, 2019
    Publication date: May 7, 2020
    Inventors: Akihiro Matsushita, Kiwamu Kobayashi
  • Patent number: 10630961
    Abstract: A virtual viewpoint image generation system generates a virtual viewpoint image based on a plurality of captured images obtained by capturing an image capturing target region from a plurality of different directions, and position information relating to a virtual viewpoint position. The system comprises: a plurality of image capturing apparatuses; a daisy-chain-type topology network; an obtainment unit configured to obtain the position information relating to the virtual viewpoint position; and a generation unit configured to generate the virtual viewpoint image based on the position information and the data based on each captured image of the plurality of image capturing apparatuses obtained via the daisy-chain-type topology network.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: April 21, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Akihiro Matsushita, Kiwamu Kobayashi
  • Publication number: 20200106142
    Abstract: A battery manufacturing apparatus includes a binding member for bounding a battery stack and a fluid supplying part for blowing cooling fluid onto the bound battery stack. The binding member includes a first both-side part for bounding batteries from both sides by applying a load thereon in a first direction in which the batteries are arranged, and a second both-side part to be placed on both sides of the batteries to face both side surfaces of the batteries in a second direction different from the first direction. The binding member is formed with apertures through which the cooling fluid flows outward in the second direction. The fluid supplying part includes a first discharging part and a second discharging part for discharging the cooling fluid from both sides in a third direction different from both the first direction and the second direction toward the battery stack bound by the binding member.
    Type: Application
    Filed: July 8, 2019
    Publication date: April 2, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Naotaka IDE, Kiwamu KOBAYASHI
  • Publication number: 20200090342
    Abstract: Provided is an image processing apparatus comprising: one or more memories that store a set of instructions; and one or more processors that execute the instructions to obtain a plurality of inputted images that are contiguously captured, perform determination of a first region based on the obtained inputted images, the first region being formed from pixels each having a change in pixel value below a predetermined threshold in a predetermined period, the determination being performed in each of a plurality of the continuous predetermined periods, determine a second region based on a plurality of the first regions determined in the plurality of the continuous predetermined periods, respectively, determine a third region by subjecting image data representing the determined second region to image processing, and update a background image based on the obtained inputted images and any of the determined third region.
    Type: Application
    Filed: August 29, 2019
    Publication date: March 19, 2020
    Inventors: Kiwamu Kobayashi, Akihiro Matsushita
  • Publication number: 20200067147
    Abstract: Provided is an electricity storage device testing method including: building a closed circuit by connecting an external power source to a charged electricity storage device such that the direction of voltage of the external power source is opposite from that of the electricity storage device; measuring a circuit current while applying to the closed circuit a voltage in an opposite direction from a voltage of the electricity storage device by the external power source; calculating a voltage to be output by the external power source, based on the value of the circuit current measured and a resistance value of the closed circuit. The output voltage of the external power source is changed according to a result of the calculation. A time interval at which the calculation is set to be shorter at an early stage and longer at a late stage of the measuring.
    Type: Application
    Filed: June 20, 2019
    Publication date: February 27, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takeshi GOTO, Kiwamu KOBAYASHI
  • Publication number: 20200058167
    Abstract: A generation device of a three-dimensional model including: an acquisition unit configured to acquire a first mask image indicating a structure area, which is an object still within each image captured from a plurality of viewpoints, and a second mask image indicating a foreground area, which is a moving object within each image captured from the plurality of viewpoints; a combination unit configured to generate a third mask image that integrates the structure area and the foreground area within the image captured from the plurality of viewpoints by combining the first mask image and the second mask image both acquired; and a generation unit configured to generate a three-dimensional model including the structure and the foreground by a visual volume intersection method using the third mask image.
    Type: Application
    Filed: October 24, 2019
    Publication date: February 20, 2020
    Inventors: Keisuke Morisawa, Kiwamu Kobayashi
  • Publication number: 20200041575
    Abstract: An electricity storage device tester including: a voltage application unit configured to apply to a circuit a direct-current voltage; an ammeter configured to acquire a current value of the circuit; a voltage control unit configured to control an output voltage of the voltage application unit; and a determination unit configured to determine whether the electricity storage device is defective or not based on the value acquired by the ammeter. The voltage application unit includes a plurality of power source devices connected in series with each other. One of the power source devices is a specific power source device which is configured to have a variable output voltage and of which both a maximum value and a step width of the output voltage are smaller than the power source devices other than the specific power source device.
    Type: Application
    Filed: May 17, 2019
    Publication date: February 6, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kiwamu KOBAYASHI, Takeshi GOTO
  • Patent number: 10552980
    Abstract: An image processing apparatus in an image processing system configured to generate a virtual point image using a plurality of images captured by a plurality of image capturing apparatus receives a first difference image being based on a difference between a third image based on image capturing performed by a third image capturing apparatus of the plurality of image capturing apparatuses and a second image based on image capturing performed by a second image capturing apparatus of the plurality of image capturing apparatuses and has a smaller data amount than that of the third image, and acquires a foreground image by extracting a predetermined object from the second image, using the received first difference image and a second difference image between a first image based on image capturing performed by a first image capturing apparatus of the plurality of image capturing apparatus and the second image.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: February 4, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hidenori Ito, Kiwamu Kobayashi
  • Publication number: 20200025831
    Abstract: A circuit is formed by connecting positive terminals and negative terminals of a power storage device and an external power supply, and a resistor and a switch are arranged in series between a positive-side conductor and a negative-side conductor. An ON time for which the switch is temporarily closed before start of inspection is made longer as the capacity of the power storage device is larger. An ON voltage between the positive-side and negative-side conductors within the ON time, and an OFF voltage between these conductors at a time other than the ON time are obtained, and a parasitic resistance value of the circuit is calculated based on the ON and OFF voltages and a resistance value of the resistor. During the inspection, the voltage of the external power supply, which is applied to the power storage device, is increased according to the parasitic resistance value.
    Type: Application
    Filed: May 28, 2019
    Publication date: January 23, 2020
    Inventors: Takeshi GOTO, Kiwamu KOBAYASHI