Patents by Inventor Liu Zhenyi

Liu Zhenyi 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).

  • Apparatus and method for detecting defect of press panel
    Patent number: 9846144
    Abstract: An apparatus for detecting a defect of a press panel includes: an acoustic emission sensor unit configured to detect at least one elastic wave signal emitted from the press panel as a detection target during press work, a period measurer configured to measure a period as a section in which there are consecutive signals with a greater voltage than a threshold voltage among the at least one detected signals, and a defect existence determination unit configured to determine that a defect is generated in the press panel when the measured period is greater than a first reference value, and to determine that the press panel is in a normal state when the measured period is smaller than a second reference value which is smaller than the first reference value.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: December 19, 2017
    Assignees: Hyundai Motor Company, Kia Motors Corporation, UNIST Academy-Industry Research Corporation
    Inventors: Jae Ryeon Hwang, ByungHun Kim, Franklin Bien, Hyon Gi Yoo, Chan Woo Jeong, Nguyen Ngoc Quang, Liu Zhenyi, Seul Ki Rom Kim