Patents by Inventor Yoshihiro Kawamura

Yoshihiro Kawamura 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: 8159230
    Abstract: An insulation measurement method in an insulation measurement apparatus of a flying capacitor type, includes a first power supply charge voltage measurement process of applying a voltage of a power supply to a flying capacitor for a first charge time period a first grounding resistor measuring voltage measurement process of applying the voltage of the power supply to the flying capacitor via an insulation resistor on one electrode side of the power supply, a second power supply charge voltage measurement process of applying the voltage of the power supply to the flying capacitor for a second charge time period, a second grounding resistor measuring voltage measurement process of applying the voltage of the power supply to the flying capacitor via an insulation resistor on the other electrode side of the power supply, and an insulation resistor conversion process of obtaining a value of the insulation resistor based on measurement results of the first and second charge voltage measurement processes and the fir
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: April 17, 2012
    Assignees: Yazaki Corporation, Honda Motor Co., Ltd.
    Inventors: Yoshihiro Kawamura, Mitsuteru Yano, Toshihiro Sone, Toshiaki Takeshita
  • Publication number: 20120081135
    Abstract: An insulation measurement apparatus includes a path including a first resistor, a capacitor electrically floated from a ground, and a second resistor between a positive to a negative electrode side of a power supply, a first switching element between the power supply positive electrode side and the capacitor, a second switching element between the capacitor and the power supply negative electrode side, a detection section detecting a charge voltage on the capacitor and determining a power supply insulation state, and a voltage setting section executing a power supply voltage measurement mode controlling the first and second switching elements to charge the capacitor for a predetermined time period, and an insulation voltage measurement mode charging a terminal of a positive or negative electrode side of the capacitor via a resistor between the power supply positive or negative electrode and the ground for a predetermined time period.
    Type: Application
    Filed: December 9, 2011
    Publication date: April 5, 2012
    Inventors: Yoshihiro KAWAMURA, Takafumi TSURUMI, Shintaro UCHIDA
  • Publication number: 20120066777
    Abstract: Disclosed are: a method for detecting (diagnosing) visceral obesity in a subject; a test agent useful for the method; a method for searching for a substance that can be used as an active ingredient for ameliorating visceral obesity; and an ameliorating agent for visceral obesity or a medicinal agent for preventing a metabolic disease developed as a result of the progression of visceral obesity. As the test agent, a polynucleotide which comprises at least 15 nucleotides and can hybridize with a nucleotide sequence for coiled-coil domain containing protein 3 (CCDC3) gene or a nucleotide sequence complementary to the nucleotide sequence under stringent conditions or an antibody capable of recognizing CCDC3 protein is used.
    Type: Application
    Filed: May 13, 2010
    Publication date: March 15, 2012
    Applicants: SHIONOGI & CO., LTD., RIKEN, SHIGA UNIVERSITY OF MEDICAL SCIENCE
    Inventors: Yoshihiro Kawamura, Masatomo Rokushima, Minoru Suzuki, Tatsuya Takahashi, Minoru Ikeda, Atsunori Kashiwagi, Hiroshi Maegawa, Tohru Tani, Shiro Maeda
  • Patent number: 8106667
    Abstract: An insulation measurement apparatus includes a path including a first resistor, a capacitor electrically floated from a ground, and a second resistor between a positive to a negative electrode side of a power supply, a first switching element between the power supply positive electrode side and the capacitor, a second switching element between the capacitor and the power supply negative electrode side, a detection section detecting a charge voltage on the capacitor and determining a power supply insulation state, and a voltage setting section executing a power supply voltage measurement mode controlling the first and second switching elements to charge the capacitor for a predetermined time period, and an insulation voltage measurement mode charging a terminal of a positive or negative electrode side of the capacitor via a resistor between the power supply positive or negative electrode and the ground for a predetermined time period.
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: January 31, 2012
    Assignees: Yazaki Corporation, Honda Motor Co., Ltd.
    Inventors: Yoshihiro Kawamura, Takafumi Tsurumi, Shintaro Uchida
  • Publication number: 20110310928
    Abstract: A temperature determination apparatus includes a signal detection section having an A/D input port, a thermistor that is connected to the A/D input port and outputs an analogue signal to the A/D input port, and a switch section that shifts a level of the analogue signal to a low level. The signal detection section determines that a control signal having a priority higher than that of an output detection process of the thermistor is generated when it is detected that the analogue signal to be input to the A/D input port is in the low level.
    Type: Application
    Filed: June 15, 2011
    Publication date: December 22, 2011
    Inventors: Yoshihiro Kawamura, Susumu Yamamoto, Mitsuteru Yano
  • Publication number: 20110084705
    Abstract: An insulation measuring apparatus, comprises: a measuring circuit including a first capacitor; a control unit that reads a voltage set on the first capacitor to decide an insulation state of a power supply, and control a path configuration of the measuring circuit; a switching section provided in a path located between the measuring circuit and the control unit; and a second capacitor provided between a ground and a path located between the switching section and the control unit. The control unit controls the path configuration of the measuring circuit, by turning ON the switching section to set a voltage corresponding to the voltage that is set on the first capacitor on the second capacitor, and then by turning OFF the switching section to read the voltage set on the second capacitor and to discharge an electric charge corresponding to the voltage being set on the first capacitor.
    Type: Application
    Filed: September 24, 2010
    Publication date: April 14, 2011
    Applicant: YAZAKI CORPORATION
    Inventor: Yoshihiro KAWAMURA
  • Publication number: 20110030998
    Abstract: A halogen-free and flame-resistant photosensitive resin composition is provided, which has properties necessary for a solder resist (insulative property, solder heat resistance, alkali developability and the like) and is capable of forming a film that is excellent in folding endurance even after an IR reflow process. A flexible circuit board employing the photosensitive resin composition and a circuit board production method are also provided.
    Type: Application
    Filed: August 4, 2010
    Publication date: February 10, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masaki Mizutani, Toshikazu Baba, Yoshihiro Kawamura
  • Patent number: 7877867
    Abstract: A resist having a predetermined thickness is formed on a printed circuit board except for portions of the printed circuit board that oppose a convex portion of a component when the component is mounted on the printed circuit board. A silk screen printed layer having a predetermined thickness is formed on the resist. Thereafter, a concave portion of the component is bonded to the silk screen printed layer using double coated tape having a predetermined thickness. The component is mounted such that the convex portions of the component oppose the portions of the printed circuit board that do not have a resist formed thereon. The sum of the thicknesses of the resist, the silk screen printed layer and the double coated tape is larger than a height difference between the concave portion and the convex portion of the component.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: February 1, 2011
    Assignee: Yazaki Corporation
    Inventor: Yoshihiro Kawamura
  • Publication number: 20110012606
    Abstract: An insulation state detector detects an insulation state with respect to a ground potential portion of a DC power source on the basis of a charging voltage of a flying capacitor. The insulation state connector includes a detecting section that detects the insulation state of the DC power source by defining the charging voltage of the flying capacitor in the ground fault state as a charging voltage, in an unbalanced state where voltages across both ends of the positive-side Y capacitor and the negative-side Y capacitor are not equal to voltages obtained by dividing the voltage of the DC power source according to a voltage division ratio of the positive-side ground fault resistor and the negative-side ground fault resistor.
    Type: Application
    Filed: June 23, 2010
    Publication date: January 20, 2011
    Applicant: YAZAKI CORPORATION
    Inventor: Yoshihiro KAWAMURA
  • Publication number: 20110006781
    Abstract: An insulation state detector includes a capacitor, a measurement section measuring a charging voltage of the capacitor, a measuring circuit that connects the capacitor, which is insulated from a DC power source after being charged by the DC power source, between the measurement section and a ground potential portion, a detector detecting an insulation state of a voltage boosting circuit, and a reversed-polarity measuring circuit that connects the capacitor to the measurement section and the ground potential portion with reversed polarity when a potential corresponding to a division ratio of a positive-side ground fault resistor and a negative-side ground fault resistor on a secondary side of the voltage boosting circuit exceeds a positive potential of the DC power source and the capacitor is charged with reversed polarity by a secondary-side positive potential at the time of charging of the capacitor using the positive potential of the DC power source.
    Type: Application
    Filed: June 29, 2010
    Publication date: January 13, 2011
    Applicant: YAZAKI CORPORATION
    Inventor: Yoshihiro KAWAMURA
  • Publication number: 20100246081
    Abstract: When a malfunction of an ungrounded drive electric system including first and second ungrounded power supplies, an inverter, and a motor which is energized by the first and second ungrounded power supplies through the inverter, i.e., an erroneous opening of switches of a battery, is detected, switches of an insulation resistance detector are opened to insolate the insulation resistance detector from the ungrounded drive electric system.
    Type: Application
    Filed: March 31, 2010
    Publication date: September 30, 2010
    Applicants: HONDA MOTOR CO., LTD., YAZAKI CORPORATION
    Inventors: Mitsuteru YANO, Toshiaki TAKESHITA, Yoshihiro KAWAMURA
  • Patent number: 7785117
    Abstract: First insulating walls projected from a substrate are interposed between high voltage terminals T+, T?. The first insulating walls are disposed further away from the connector housing than the high voltage terminals T+, T?. The first insulating walls prevent mixed conductive foreign particle from touching the high voltage terminals T+, T? at the same time.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: August 31, 2010
    Assignee: Yazaki Corporation
    Inventor: Yoshihiro Kawamura
  • Publication number: 20100202124
    Abstract: A structure for mounting a compound circuit on a circuit board is provided. The compound circuit includes a high voltage circuit and a low voltage circuit whose supply voltages are different from each other. The structure includes: a main circuit board on which constituents of the low voltage circuit are mounted; and a hybrid IC which includes a sub circuit board on which at least a part of constituents of the high voltage circuit is mounted and a moisture preventing agent coating the sub circuit board, and is arranged over the main circuit board. Both an insulation distance between terminals provided on the main circuit board for connecting to the hybrid IC and an insulation distance between terminals provided on the hybrid IC for connecting to the main circuit board are larger than a minimum insulation distance between terminals provided on the constituents mounted on the sub circuit board.
    Type: Application
    Filed: December 17, 2009
    Publication date: August 12, 2010
    Applicant: YAZAKI CORPORATION
    Inventor: Yoshihiro Kawamura
  • Patent number: 7705605
    Abstract: A voltage detecting apparatus for detecting a voltage of a direct current power source by using a capacitor, which can process an abnormal voltage without elongation of measuring time. When a voltage between both terminals of the capacitor is greater than a maximum voltage in normal condition, a micro-computer discharges the capacitor through a third switch and a fourth switch to earth until the voltage between both terminals of the capacitor reduces to be not larger than a voltage corresponding to a maximum rated current of a reset switch. When the voltage between both terminals reaches to be not larger than the voltage corresponding to the maximum rated current, the capacitor is rapidly discharged through the reset switch by controlling the reset switch to be closed.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: April 27, 2010
    Assignee: Yazaki Corporation
    Inventors: Kenji Hayakawa, Yoshihiro Kawamura
  • Patent number: 7656164
    Abstract: A method of voltage measurement, and an apparatus for the same, having an improved accuracy and low cost is provided. The apparatus includes: a charging unit for charging a capacitor; a measuring unit for measuring a charge of the capacitor; and a microcomputer for calculating a voltage of the voltage supply. The microcomputer includes a correction value calculating program. The correction value calculating program applies a voltage of a correction measurement voltage supply to the measuring unit, measures the voltage of the correction measurement voltage supply, and calculates a correction value from a difference between a measurement value and a theoretical value of the voltage of the correction measurement voltage supply. The microcomputer also includes a voltage measurement program for subtracting the correction value from the measurement value of the charge during the prescribed period of time of charge measurement and for calculating the voltage of the voltage supply.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: February 2, 2010
    Assignee: Yazaki Corporation
    Inventor: Yoshihiro Kawamura
  • Publication number: 20090289639
    Abstract: An insulation measurement method in an insulation measurement apparatus of a flying capacitor type, includes a first power supply charge voltage measurement process of applying a voltage of a power supply to a flying capacitor for a first charge time period a first grounding resistor measuring voltage measurement process of applying the voltage of the power supply to the flying capacitor via an insulation resistor on one electrode side of the power supply, a second power supply charge voltage measurement process of applying the voltage of the power supply to the flying capacitor for a second charge time period, a second grounding resistor measuring voltage measurement process of applying the voltage of the power supply to the flying capacitor via an insulation resistor on the other electrode side of the power supply, and an insulation resistor conversion process of obtaining a value of the insulation resistor based on measurement results of the first and second charge voltage measurement processes and the fir
    Type: Application
    Filed: May 21, 2009
    Publication date: November 26, 2009
    Inventors: Yoshihiro Kawamura, Mitsuteru Yano, Toshihiro Sone, Toshiaki Takeshita
  • Publication number: 20090289640
    Abstract: An insulation measurement apparatus includes a path including a first resistor, a capacitor in a state electrically floated from a ground potential, and a second resistor coupled in series sequentially from a positive electrode side of a power supply to a negative electrode side of the power supply, a first switching element provided in a path from the positive electrode side of the power supply to the capacitor, a second switching element provided in a path from the capacitor to the negative electrode side of the power supply, a detection section which detects a charge voltage set to the capacitor and determines an insulation state of the power supply, and a voltage setting section which executes a power supply voltage measurement mode for controlling the first and second switching elements to charge the capacitor by a voltage of the power supply for a predetermined voltage applying time period for measuring the voltage of the power supply, and an insulation voltage measurement mode for charging a terminal o
    Type: Application
    Filed: May 21, 2009
    Publication date: November 26, 2009
    Inventors: Yoshihiro Kawamura, Takafumi Tsurumi, Shintaro Uchida
  • Publication number: 20090280361
    Abstract: A power supply system using a fuel cell comprises a chemical reaction section (100) including, a evaporation section (103, 112, 114) that receives a power generation fuel and water supplied to it, heating at least the water supplied to it to evaporate it and a reaction section (105, 107) that generates a power generation gas on the basis of the steam generated by the evaporation section and the power generation fuel, a fuel supply section (P1, V1) that supplies the power generation fuel to the chemical reaction section, a water supply section (P2, V2) that supplies water to the chemical reaction section and a control section (130) that controls the operation of the system so as to stop supply of the power generation fuel from the fuel supply section to the chemical reaction section when the evaporation section is not in a condition suitable for evaporating operation.
    Type: Application
    Filed: July 31, 2006
    Publication date: November 12, 2009
    Applicant: CASIO COMPUTER CO.,LTD.
    Inventors: Hiroyasu Bitoh, Yasunari Kabasawa, Yoshihiro Kawamura, Masaharu Shioya
  • Patent number: 7586754
    Abstract: The printed wiring board includes: a conductive wiring which is formed on a surface of a board and has a plurality of solder lands, to which components to be mounted are electrically connected by solder; and first and second electrically insulating layers formed on the conductive wiring, wherein the first insulating layer is formed on the conductive wiring in such a manner that the first insulating layer covers a portion of a peripheral part of one solder land and a central part of the one solder land is exposed, the portion of the peripheral part being situated on the side of another solder land, wherein the second insulating layer is piled up on the first insulating layer which covers the portion of the peripheral part of the one solder land.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: September 8, 2009
    Assignee: Yazaki Corporation
    Inventor: Yoshihiro Kawamura
  • Publication number: 20080310063
    Abstract: The present invention is to provide a voltage detecting apparatus, which can downsize a circuit, reduce costs and detect a voltage with high accuracy, the voltage detecting apparatus to detect a voltage by using a flying capacitor. Furthermore, the voltage detecting apparatus does not halt whole functions. The first zener diode is connected to the first resistor R1, which divides a voltage stored with the capacitor as a flying capacitor into a detectable voltage at a microcomputer, in parallel. Furthermore, the voltage detecting apparatus prevents more than a zener voltage of the first zener diode from applying to the input of the microcomputer.
    Type: Application
    Filed: May 20, 2008
    Publication date: December 18, 2008
    Applicants: YAZAKI CORPORATION, HONDA MOTOR CO., LTD.
    Inventors: Yoshihiro KAWAMURA, Toshiaki Takeshita, Mitsuteru Yano