Patents by Inventor Junichi KAZAWA

Junichi KAZAWA 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).

  • Observation apparatus, observation method, and non-transitory computer readable medium storing a program
    Patent number: 11629653
    Abstract: [Object] To observe the sign or occurrence of an unstable operation of a turbo-machine. [Solving Means] An observation apparatus 1 includes: a detection unit 10 including one or two or more sensors 11, 12 that are disposed in a turbo-machine 2, are highly time responsive, and observe unsteady fluctuations of the turbo-machine 2; a computation unit 20 that output signals from the one or two or more sensors 11, 12 every moment, stores time series data for a predetermined period, and calculates in real time a parameter for detecting an unstable operation of the turbo-machine; and a determination unit 30 that compares the parameter for detecting the unstable operation with a predetermined threshold and outputs in real time a determination result of a sign or occurrence of the unstable operation.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: April 18, 2023
    Assignee: JAPAN AEROSPACE EXPLORATION AGENCY
    Inventors: Toshio Nishizawa, Junichi Kazawa, Hiroshi Gotoda, Hiroaki Kobayashi, Yuto Hayashi, Takayoshi Hachijo
  • OBSERVATION APPARATUS, OBSERVATION METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM STORING A PROGRAM
    Publication number: 20210164406
    Abstract: [Object] To observe the sign or occurrence of an unstable operation of a turbo-machine. [Solving Means] An observation apparatus 1 includes: a detection unit 10 including one or two or more sensors 11, 12 that are disposed in a turbo-machine 2, are highly time responsive, and observe unsteady fluctuations of the turbo-machine 2; a computation unit 20 that output signals from the one or two or more sensors 11, 12 every moment, stores time series data for a predetermined period, and calculates in real time a parameter for detecting an unstable operation of the turbo-machine; and a determination unit 30 that compares the parameter for detecting the unstable operation with a predetermined threshold and outputs in real time a determination result of a sign or occurrence of the unstable operation.
    Type: Application
    Filed: March 25, 2019
    Publication date: June 3, 2021
    Inventors: Toshio NISHIZAWA, Junichi KAZAWA, Hiroshi GOTODA, Hiroaki KOBAYASHI, Yuto HAYASHI, Takayoshi HACHIJO