Patents by Inventor Yu M. Zhang

Yu M. Zhang 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 measuring 3-D weld pool shape
    Patent number: 5481085
    Abstract: A method and apparatus are provided allowing the determination of 3-D weld pool surface geometry in the presence of a welding arc during a welding operation. The method includes the steps of illuminating the weld pool surface with diffused, structured light and detecting specular reflection of that diffused, structured light from the weld pool surface. An acquired image results. By analyzing the acquired image it is possible to determine the geometry of the weld pool surface. The apparatus for performing the method includes a high intensity light source, a diffuser and a structured light forming grid. A camera is provided for specular reflection detection of the light reflecting from the weld pool surface.
    Type: Grant
    Filed: September 9, 1994
    Date of Patent: January 2, 1996
    Assignee: University of Kentucky Research Foundation
    Inventors: Radovan Kovacevic, Yu M. Zhang