Patents by Inventor Koen E. A. Van Den Abeele

Koen E. A. Van Den Abeele 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).

  • Resonant nonlinear ultrasound spectroscopy
    Patent number: 6330827
    Abstract: Components with defects are identified from the response to strains applied at acoustic and ultrasound frequencies. The relative resonance frequency shift |&Dgr;ƒ/ƒ0|, is determined as a function of applied strain amplitude for an acceptable component, where ƒ0 is the frequency of the resonance peak at the lowest amplitude of applied strain and &Dgr;ƒ is the frequency shift of the resonance peak of a selected mode to determine a reference relationship. Then, the relative resonance frequency shift |&Dgr;ƒ/ƒ0 is determined as a function of applied strain for a component under test, where fo ƒ0 the frequency of the resonance peak at the lowest amplitude of applied strain and &Dgr;ƒ is the frequency shift of the resonance peak to determine a quality test relationship. The reference relationship is compared with the quality test relationship to determine the presence of defects in the component under test.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: December 18, 2001
    Assignee: The Regents of the University of California
    Inventors: Paul A. Johnson, James A. TenCate, Robert A. Guyer, Koen E. A. Van Den Abeele