Patents by Inventor Yoshihiro Hishikawa

Yoshihiro Hishikawa 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: 20180034410
    Abstract: In order to provide an evaluation apparatus that is capable of measuring the performance of a photovoltaic power generation system accurately while using simple equipment outdoors using sunlight, there are provided a plurality of illumination intensity sensors disposed in the vicinity of the photovoltaic panels, and an evaluator that is connected to a PCS and to the sensors, and evaluates the performance of the photovoltaic power generation system based on outputs from each of these, and the evaluator includes an output acquisition unit that acquires an output of the photovoltaic panels from the PCS, a consistency degree calculation unit that calculates a degree of consistency in illumination intensity measurement values measured by the sensors, and a determination unit that, when the degree of consistency is within a predetermined permissible range, determines that the output of the photovoltaic panels acquired by the output acquisition unit is a true value.
    Type: Application
    Filed: January 19, 2017
    Publication date: February 1, 2018
    Inventors: Yoshihiro Hishikawa, Hisashi Kojima, Yuji Fujita, Yoshikazu Takeda
  • Patent number: 9176182
    Abstract: To provide an I-V characteristic measuring apparatus that can, even though a solar simulator of a flash light type is used, accurately measure a true I-V characteristic of a solar cell that exhibits a different I-V characteristic depending on a sweep direction when a sweep time of applied voltage is short, an internal division ratio calculation part that, at each voltage value, calculates an internal division ratio at which a current value of a dark state stationary I-V characteristic internally divides a gap between a current value of a dark state forward I-V characteristic and a current value of a dark state reverse I-V characteristic; and a light state stationary I-V characteristic estimation and calculation part that, on the basis of the internal division ratio, a light state forward I-V characteristic, and a light state reverse I-V characteristic, estimates and calculates a light state stationary I-V characteristic are provided.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: November 3, 2015
    Assignees: National Institute of Advanced Industrial Science and Technology, KYOSHIN ELECTRIC CO., LTD.
    Inventors: Yoshihiro Hishikawa, Haruya Shimura, Kohei Kamatani, Hajime Kondo, Akio Shimono
  • Publication number: 20140354323
    Abstract: To provide an I-V characteristic measuring apparatus that can, even though a solar simulator of a flash light type is used, accurately measure a true I-V characteristic of a solar cell that exhibits a different I-V characteristic depending on a sweep direction when a sweep time of applied voltage is short, an internal division ratio calculation part that, at each voltage value, calculates an internal division ratio at which a current value of a dark state stationary I-V characteristic internally divides a gap between a current value of a dark state forward I-V characteristic and a current value of a dark state reverse I-V characteristic; and a light state stationary I-V characteristic estimation and calculation part that, on the basis of the internal division ratio, a light state forward I-V characteristic, and a light state reverse I-V characteristic, estimates and calculates a light state stationary I-V characteristic are provided.
    Type: Application
    Filed: December 26, 2013
    Publication date: December 4, 2014
    Applicants: KYOSHIN ELECTRIC CO., LTD., National Institute of Advanced Industrial Science and Technology
    Inventors: Yoshihiro Hishikawa, Haruya Shimura, Kohei Kamatani, Hajime Kondo, Akio Shimono
  • Publication number: 20070267056
    Abstract: A simulated solar light irradiation apparatus is provided which irradiates light onto a test piece 6, in which a plurality of filters 4 for improvement in the uniformity of light on a surface of the test piece 6 are arranged, between a light emission portion 2 and the test piece 6, on a plane substantially vertical to an optical axis.
    Type: Application
    Filed: May 14, 2007
    Publication date: November 22, 2007
    Inventor: Yoshihiro HISHIKAWA
  • Patent number: 6521257
    Abstract: A gelled composition was provided by adding a gelling component to a carrier for adsorption. Not only was the taste of the carrier for adsorption significantly reduced in this composition, but the dosage was also decreased so that the composition could be easily taken by a patient.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: February 18, 2003
    Assignee: Ohkura Pharmaceutical Co., Ltd.
    Inventors: Shigeru Taniguchi, Tomonori Yonezu, Hitomi Izumi, Yoshihiro Hishikawa