Patents by Inventor Steffen BERGHOLZ

Steffen BERGHOLZ 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).

  • Method for detecting temporally varying thermomechanical stresses and/or stress gradients over the wall thickness of metal bodies
    Patent number: 9903840
    Abstract: The present invention relates to a method for detecting temporally varying thermomechanical stresses and/or stress gradients over the wall thickness of metal bodies, in particular pipelines. In the method, the temperature on the outer surface of the body is measured in order to determine a temperature progression and stress progression therefrom. In addition, electromagnetic ultrasonic transducers are used at at least one measuring point on the outer surface in order to determine the progression of the stresses and/or stress gradients over time over the wall thickness of the body in conjunction with the result of the temperature measurement. The method allows the fatigue monitoring of pipelines even in the event of rapid stress changes.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: February 27, 2018
    Assignee: AREVA GMBH
    Inventors: Iris Altpeter, Ralf Tschuncky, Hans-Georg Herrmann, Jochen Kurz, Gerd Dobmann, Gerhard Hübschen, Steffen Bergholz, Jürgen Rudolph
  • METHOD FOR DETECTING TEMPORALLY VARYING THERMOMECHANICAL STRESSES AND/OR STRESS GRADIENTS OVER THE WALL THICKNESS OF METAL BODIES
    Publication number: 20160003780
    Abstract: The present invention relates to a method for detecting temporally varying thermomechanical stresses and/or stress gradients over the wall thickness of metal bodies, in particular pipelines. In the method, the temperature on the outer surface of the body is measured in order to determine a temperature progression and stress progression therefrom. In addition, electromagnetic ultrasonic transducers are used at at least one measuring point on the outer surface in order to determine the progression of the stresses and/or stress gradients over time over the wall thickness of the body in conjunction with the result of the temperature measurement. The method allows the fatigue monitoring of pipelines even in the event of rapid stress changes.
    Type: Application
    Filed: February 20, 2014
    Publication date: January 7, 2016
    Inventors: Iris ALTPETER, Ralf TSCHUNCKY, Hans-Georg HERRMANN, Jochen KURZ, Gerd DOBMANN, Gerhard HÜBSCHEN, Steffen BERGHOLZ, Jürgen RUDOLPH