Patents by Inventor Ching Hua Joseph Lee

Ching Hua Joseph Lee 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).

  • Patent number: 9429938
    Abstract: A method of qualifying performance of a conventional control valve in a process plant, the valve being controlled by a controller, the method comprising a processor obtaining data samples from a database stored on a server of the process plant, each data sample comprising a process variable, a set-point, and a manipulated variable; the processor computing a non-linearity index from the data samples and determining if the non-linearity index is greater than a threshold value; if the non-linearity index is greater than the threshold value, the processor charting a plot of the process variable against the manipulated variable and determining if the plot has an elliptical or rectangular fit; and if the plot has an elliptical fit, the processor determining if a percentage of the total number of data samples lying within a theoretical ellipse encompassed within the elliptical fit is less than or equal to a preset percentage.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: August 30, 2016
    Assignee: YOKOGAWA ELECTRIC CORPORATION
    Inventors: Sankar Selvaraj, Lakshmi Kiran Kanchi, Ching Hua Joseph Lee
  • Patent number: 8548606
    Abstract: An apparatus for managing tasks in an industrial plant comprises a task generator for generating at least one task to be performed in the industrial plant; a task scheduler for assigning a priority to each of the at least one task by analyzing the information of the plant; and a communication module for exchanging task information with a mobile device. The information of the plant may comprise static information and dynamic information of the plant. Preferably, the at least one task may comprise an event task dynamically generated by the task generator.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: October 1, 2013
    Assignee: Yokogawa Electric Corporation
    Inventors: Naveen Kashyap, Jin Song Qian, Ching Hua Joseph Lee
  • Publication number: 20120078387
    Abstract: An apparatus for managing tasks in an industrial plant comprises a task generator for generating at least one task to be performed in the industrial plant; a task scheduler for assigning a priority to each of the at least one task by analyzing the information of the plant; and a communication module for exchanging task information with a mobile device. The information of the plant may comprise static information and dynamic information of the plant. Preferably, the at least one task may comprise an event task dynamically generated by the task generator.
    Type: Application
    Filed: September 27, 2010
    Publication date: March 29, 2012
    Applicant: YOKOGAWA ELECTRIC CORPORATION
    Inventors: Naveen Kashyap, Jin Song Qian, Ching Hua Joseph Lee