Patents by Inventor Shunyee Liu

Shunyee Liu 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).

  • Pressure gauge
    Patent number: 7062973
    Abstract: A pressure gauge includes a housing and a mechanical sensor placed in the housing for sensing change of the pressure. A characteristic of the sensor varies in correspondence to the change of the pressure. The gauge also includes an optical fiber, at least part of which is in the housing with a first end connected to the sensor such that a characteristic of the fiber varies in correspondence to the variance of the characteristic of the sensor, and an optical signal generator connected to a second end of the fiber for emitting an optical signal into the fiber. The second end of the fiber is distanced from the sensor, and the fiber generates at least a first reflected optical signal towards said second end, which first reflected optical signal contains information relating to the variance of the characteristic of the fiber.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: June 20, 2006
    Assignee: The Hong Kong Polytechnic University
    Inventors: Hwayaw Tam, Aping Zhang, Shunyee Liu, Wenghong Chung
  • PRESSURE GAUGE
    Publication number: 20060070446
    Abstract: A pressure gauge includes a housing and a mechanical sensor placed in the housing for sensing change of the pressure. A characteristic of the sensor varies in correspondence to the change of the pressure. The gauge also includes an optical fiber, at least part of which is in the housing with a first end connected to the sensor such that a characteristic of the fiber varies in correspondence to the variance of the characteristic of the sensor, and an optical signal generator connected to a second end of the fiber for emitting an optical signal into the fiber. The second end of the fiber is distanced from the sensor, and the fiber generates at least a first reflected optical signal towards said second end, which first reflected optical signal contains information relating to the variance of the characteristic of the fiber.
    Type: Application
    Filed: September 30, 2004
    Publication date: April 6, 2006
    Inventors: Hwayaw Tam, Aping Zhang, Shunyee Liu, Wenghong Chung