Patents by Inventor Toshihiko Hironaga

Toshihiko Hironaga 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).

  • Method and apparatus for monitoring temperature of blast furnace and temperature control system using temperature monitoring apparatus
    Patent number: 5356220
    Abstract: An optical fiber is laid in a spiral shape on a surface of an iron skin of a hot-air oven constituting a blast furnace facility, and one end of the optical fiber is connected to a temperature measuring apparatus. A temperature distribution of an optical fiber laid area is measured based on the intensity of Raman back scattering light of a light pulse transmitted into the optical fiber and based on a time interval until the Raman back scattering light returns to the transmission end of the optical fiber. The temperature distribution is displayed on a display screen to monitor the temperature distribution of the whole area of the iron skin of the hot-air oven to detect an abnormal condition thereof.
    Type: Grant
    Filed: May 18, 1993
    Date of Patent: October 18, 1994
    Assignee: Kawasaki Steel Corporation
    Inventors: Osamu Iida, Toshihiko Hironaga, Katsuhiko Yanagisawa