Patents by Inventor Hidehiko Komeda

Hidehiko Komeda 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).

  • Optical fiber temperature distribution measuring apparatus, method for measuring optical fiber temperature distribution, and optical fiber temperature distribution measuring system
    Patent number: 7874725
    Abstract: An optical fiber temperature distribution measuring apparatus and a method for measuring optical fiber temperature distribution, provided with a light source for inputting a pulse light to an optical fiber to be measured, a signal detecting unit for detecting a received light intensity of a predetermined light included in a backscattering light generated by an input of the pulse light in the optical fiber to be measured, and a signal processing unit for calculating a value corresponding to a variation of the received light intensity due to a hydrogen molecular absorption of the optical fiber to be measured based on the received light intensity of the predetermined light, to compensate the received light intensity of the predetermined light corresponding to a temperature of the optical fiber to be measured based on the value.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: January 25, 2011
    Assignees: J-Power Systems Corporation, Sumitomo Electric Industries, Ltd.
    Inventors: Hidehiko Komeda, Tsuyoshi Igi, Yasushi Koyano, Fumiyoshi Ohkubo, Kazuaki Negishi
  • Optical Fiber Temperature Distribution Measuring Apparatus, Method for Measuring Optical Fiber Temperature Distribution, and Optical Fiber Temperature Distribution Measuring System
    Publication number: 20090059996
    Abstract: An optical fiber temperature distribution measuring apparatus and a method for measuring optical fiber temperature distribution, provided with a light source for inputting a pulse light to an optical fiber to be measured, a signal detecting unit for detecting a received light intensity of a predetermined light included in a backscattering light generated by an input of the pulse light in the optical fiber to be measured, and a signal processing unit for calculating a value corresponding to a variation of the received light intensity due to a hydrogen molecular absorption of the optical fiber to be measured based on the received light intensity of the predetermined light, to compensate the received light intensity of the predetermined light corresponding to a temperature of the optical fiber to be measured based on the value.
    Type: Application
    Filed: September 21, 2007
    Publication date: March 5, 2009
    Inventors: Hidehiko Komeda, Tsuyoshi Igi, Yasushi Koyano, Fumiyoshi Ohkubo, Kazuaki Negishi