Patents by Inventor Herbert Willems

Herbert Willems 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 and system for non-destructively testing a metallic workpiece
    Patent number: 8146431
    Abstract: The invention relates to a method for nondestructive testing of a metallic workpiece (11) using an ultrasonic transducer testing head having the following steps: to generate an ultrasonic wave, an excitation pulse is transmitted using the ultrasonic transducer (1) to the workpiece (11), a response signal is measured using the magnetic field sensor (3), testing information, preferably transit time information of the ultrasonic wave and therefrom wall thickness information about the thickness of the workpiece (11), is ascertained on the basis of an ultrasonic echo component of the response signal, and further information, in particular distance information about the distance of the testing head from the workpiece (11), is ascertained on the basis of a magnetic field component of the response signal by supplementary analysis.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: April 3, 2012
    Assignees: NDT Systems & Services AG, Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Andre Yashan, Herbert Willems, Frank Niese
  • Method and System for Non-destructively Testing a Metallic Workpiece
    Publication number: 20090301206
    Abstract: The invention relates to a method for nondestructive testing of a metallic workpiece (11) using an ultrasonic transducer testing head having the following steps: to generate an ultrasonic wave, an excitation pulse is transmitted using the ultrasonic transducer (1) to the workpiece (11), a response signal is measured using the magnetic field sensor (3), testing information, preferably transit time information of the ultrasonic wave and therefrom wall thickness information about the thickness of the workpiece (11), is ascertained on the basis of an ultrasonic echo component of the response signal, and further information, in particular distance information about the distance of the testing head from the workpiece (11), is ascertained on the basis of a magnetic field component of the response signal by supplementary analysis.
    Type: Application
    Filed: November 21, 2006
    Publication date: December 10, 2009
    Inventors: Andre Yashan, Herbert Willems, Frank Niese
  • Device for testing ferromagnetic materials
    Patent number: 6009756
    Abstract: Device for testing ferromagnetic materials, such as pipelines and the like, for faults, cracks, corrosion, etc. An one electromagnetic ultrasonic transducer includes at least one high frequency current coil and an arraay of permanent magnets which create a magnetic field for exciting and/or detecting ultrasonic waves in the wall of the ferromagnetic material. The ultrasonic transducer is located between the pole pieces of an additional magnet arrangement that produces a magnetic prefield in the material wall.
    Type: Grant
    Filed: July 11, 1997
    Date of Patent: January 4, 2000
    Assignees: Pipetronix BmbH, Fraunhofer- Esellschaft Zur Forderung Der Angewandten Forschung
    Inventors: Herbert Willems, Otto-Alfred Barbian, Gerhard Hubschen