Patents by Inventor Akari KUBO

Akari KUBO 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).

  • Diagnostic device and diagnostic method
    Patent number: 11372048
    Abstract: The invention provides a diagnostic device including: an input/output unit that receives an input of a current value indicating a value of a current of an electric motor measured by a sensor; a frequency analysis unit that converts the current value measured by the sensor into a frequency intensity; a deterioration mode decomposition unit that uses a state mode model indicating a change situation of a frequency intensity in a part constituting the electric motor to calculate an activity level indicating a time series change of a deterioration intensity for each state mode model from the frequency intensity; and an abnormality determination unit that determines a deterioration and an abnormality of each part using the activity level.
    Type: Grant
    Filed: November 17, 2020
    Date of Patent: June 28, 2022
    Assignee: HITACHI, LTD.
    Inventors: Akari Kubo, Masayoshi Ojima, Hiroaki Kojima
  • DIAGNOSTIC DEVICE AND DIAGNOSTIC METHOD
    Publication number: 20210165045
    Abstract: The invention provides a diagnostic device including: an input/output unit that receives an input of a current value indicating a value of a current of an electric motor measured by a sensor; a frequency analysis unit that converts the current value measured by the sensor into a frequency intensity; a deterioration mode decomposition unit that uses a state mode model indicating a change situation of a frequency intensity in a part constituting the electric motor to calculate an activity level indicating a time series change of a deterioration intensity for each state mode model from the frequency intensity; and an abnormality determination unit that determines a deterioration and an abnormality of each part using the activity level.
    Type: Application
    Filed: November 17, 2020
    Publication date: June 3, 2021
    Inventors: Akari KUBO, Masayoshi OJIMA, Hiroaki KOJIMA