Patents by Inventor Virginia E. Durham

Virginia E. Durham 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).

  • System and method for least squares filtering based leak flow estimation/detection using exponentially shaped leak profiles
    Patent number: 6076048
    Abstract: A method and system for detecting and estimating leaks in an industrial boiler whereby the method and system formulate the leak detection problem as a least squares fitting problem, where one or more of the fitted parameters estimate leak flows. The method and system create a representation that incorporates a leak model component, a process model component and a noise model component into the representation. This invention provides a variety of leak dotproduct.sub.ij (tCurrent)=exp(-(tCurrent-tPrevious)/Tau.sub.ij)* dotproduct.sub.ij (tPrevious)+(1-exp(-min(t/Current-tPrevious, maxDt)/ Tau.sub.ij))*x.sub.i (tCurrent)*x.sub.j (tCurrent).
    Type: Grant
    Filed: September 26, 1997
    Date of Patent: June 13, 2000
    Assignee: BetzDearborn, Inc.
    Inventors: John C. Gunther, Ke Hong, Paul R. Burgmayer, Haiwen Chen, Virginia E. Durham