Patents by Inventor Erwin A. Frei

Erwin A. Frei 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 calibrating a detection device, and detection device
    Patent number: 10495456
    Abstract: A device designed for the three-dimensional geometrical detection of an environment includes at least one inertial measurement system for provisionally calculating a trajectory of the detection device. The device is calibrated by steps of: (a) positioning and/or orienting the detection device in a position and/or orientation with respect to at least one reference point characterized by at least one predefined relative coordinate, or determining at least one relative coordinate which characterizes the position and/or the orientation of the detection device relative to at least one reference point; (b) determining at least one error variable which characterizes the deviation of the relative coordinate in accordance with step (a) from the relative coordinate(s) provisionally calculated by the inertial measurement system; and (c) if the error variable fulfills a predefined correction criterion, correcting the provisional trajectory.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: December 3, 2019
    Assignee: LEICA GEOSYSTEMS AG
    Inventors: Harald Vennegeerts, Christian Hesse, Erwin A. Frei
  • Method for Calibrating a Detection Device, and Detection Device
    Publication number: 20140309960
    Abstract: A device designed for the three-dimensional geometrical detection of an environment includes at least one inertial measurement system for provisionally calculating a trajectory of the detection device. The device is calibrated by steps of: (a) positioning and/or orienting the detection device in a position and/or orientation with respect to at least one reference point characterized by at least one predefined relative coordinate, or determining at least one relative coordinate which characterizes the position and/or the orientation of the detection device relative to at least one reference point; (b) determining at least one error variable which characterizes the deviation of the relative coordinate in accordance with step (a) from the relative coordinate(s) provisionally calculated by the inertial measurement system; and (c) if the error variable fulfills a predefined correction criterion, correcting the provisional trajectory.
    Type: Application
    Filed: April 10, 2014
    Publication date: October 16, 2014
    Applicant: p3d systems GmbH
    Inventors: Harald Vennegeerts, Christian Hesse, Erwin A. Frei