Patents by Inventor Lichu Zhao

Lichu Zhao 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).

  • Integrated vibe/ODM fusion and trending analysis for prognostic health management of engine bearing
    Patent number: 11105712
    Abstract: A method for fault diagnosis of a bearing includes detecting, using an oil debris monitor (ODM) sensor, ODM data corresponding to an amount of debris flowing downstream from the bearing. The method also includes detecting, using a vibration sensor, vibration data corresponding to vibration of the bearing during use. The method also includes determining, by a controller, a vibration stage flag corresponding to a severity of damage of the bearing based on the vibration data. The method also includes determining, by the controller, a severity level of the damage of the bearing based on a combination of the vibration stage flag and the ODM data. The method also includes outputting, by an output device, the severity level.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: August 31, 2021
    Assignee: Raytheon Technologies Corporation
    Inventors: Yan Chen, Danbing Seto, Sheridon Everette Haye, Allan J. Volponi, Zaffir A. Chaudhry, Gregory S. Hagen, Lichu Zhao, Robert H. Luppold
  • INTEGRATED VIBE/ODM FUSION AND TRENDING ANALYSIS FOR PROGNOSTIC HEALTH MANAGEMENT OF ENGINE BEARING
    Publication number: 20190310164
    Abstract: A method for fault diagnosis of a bearing includes detecting, using an oil debris monitor (ODM) sensor, ODM data corresponding to an amount of debris flowing downstream from the bearing. The method also includes detecting, using a vibration sensor, vibration data corresponding to vibration of the bearing during use. The method also includes determining, by a controller, a vibration stage flag corresponding to a severity of damage of the bearing based on the vibration data. The method also includes determining, by the controller, a severity level of the damage of the bearing based on a combination of the vibration stage flag and the ODM data. The method also includes outputting, by an output device, the severity level.
    Type: Application
    Filed: April 6, 2018
    Publication date: October 10, 2019
    Applicant: United Technologies Corporation
    Inventors: Yan Chen, Danbing Seto, Sheridon Everette Haye, Allan J. Volponi, Zaffir A. Chaudhry, Gregory S. Hagen, Lichu Zhao, Robert H. Luppold