Patents by Inventor James Hubner

James Hubner 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).

  • Publication number: 20060192177
    Abstract: An essentially thickness independent luminescent photoelastic coating is a single layer having a photoelastic material, a polarizing preserving luminescent dye, and an excitation absorption dye therein. The absorption dye limits a penetration depth of excitation radiation incident on the layer. The thickness of the layer is greater than a penetration depth of the excitation radiation. A strain measurement system and associated method of determining strain utilize the single layer coating.
    Type: Application
    Filed: February 25, 2005
    Publication date: August 31, 2006
    Inventors: Leishan Chen, James Hubner, Yao Liu, Kirk Schanze, Peter Ifju
  • Publication number: 20060007424
    Abstract: A method and apparatus for measuring strain on a surface of a substrate utilizes a substrate surface coated with at least one coating layer. The coating layer provides both luminescence and photoelasticity. The coating layer is illuminated with excitation light, wherein longer wavelength light is emitted having a polarization dependent upon stress or strain in the coating. At least one characteristic of the emitted light is measured, and strain (if present) on the substrate is determined from the measured characteristic.
    Type: Application
    Filed: September 13, 2005
    Publication date: January 12, 2006
    Inventors: James Hubner, Peter Ifju, Kirk Schanze, Shujun Jiang, Yao Liu, David Jenkins
  • Patent number: 6327030
    Abstract: The subject invention relates to a strain-sensitive coating, a strain measurement system, and a method to determine strains on substrate materials. In a preferred embodiment of the subject invention, the system includes a luminescent strain-sensitive coating and a strain field mapping system which can be used to create a strain map of the mechanical strain on a substrate material. The luminescent strain-sensitive coating of the subject invention is preferably a polymer-based coating, and can incorporate one or more luminescent compounds. The subject coating can be applied to produce a thin film on a substrate material, such as aluminum, steel, polymer, or composite. One or more characteristics of the luminescence emanating from the coating can then vary in relation to the strain on the substrate material.
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: December 4, 2001
    Assignee: University of Florida
    Inventors: Peter Ifju, Kirk S. Schanze, Yingsheng Wang, James Hubner, David Jenkins, Wissam El-Ratal, Anthony B. Brennan, Liu He, Yibling Shen, Bruce Carroll
  • Publication number: 20010008445
    Abstract: The subject invention relates to a strain-sensitive coating, a strain measurement system, and a method to determine strains on substrate materials. In a preferred embodiment of the subject invention, the system includes a luminescent strain-sensitive coating and a strain field mapping system which can be used to create a strain map of the mechanical strain on a substrate material. The luminescent strain-sensitive coating of the subject invention is preferably a polymer-based coating, and can incorporate one or more luminescent compounds. The subject coating can be applied to produce a thin film on a substrate material, such as aluminum, steel, polymer, or composite. One or more characteristics of the luminescence emanating from the coating can then vary in relation to the strain on the substrate material.
    Type: Application
    Filed: January 10, 2001
    Publication date: July 19, 2001
    Inventors: Peter Ifju, Kirk S. Schanze, Yingsheng Wang, James Hubner, David Jenkins, Wissam El-Ratal, Anthony B. Brennan, Liu He, Yibling Shen, Bruce Carroll