Patents by Inventor Piet Griffioen

Piet Griffioen 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 of and device for tracking an object
    Patent number: 7924213
    Abstract: A method of tracking an object including the steps of: collecting N measurements of range Ri and Doppler velocity Di associated with the object from a plurality M of radar sensors Si each measurement being assigned a time stamp ti; time aligning each Range Ri measurement to a common time stamp tN to provide a corresponding time aligned range Pi for each of the N measurements; using each time aligned Range measurement Pi to define a corresponding spherical equation such that N spherical equations are defined; and deriving analytical solutions from three of the N spherical equations to determine the position vector of the object.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: April 12, 2011
    Assignee: Thales Nederland B.V.
    Inventors: Huub De Waard, Piet Griffioen, Henk Regtop, Gert Van De Brug
  • METHOD OF AND DEVICE FOR TRACKING AN OBJECT
    Publication number: 20100013697
    Abstract: A method of tracking an object including the steps of: collecting N measurements of range Ri and Doppler velocity Di associated with the object from a plurality M of radar sensors Si each measurement being assigned a time stamp ti; time aligning each Range Ri measurement to a common time stamp tN to provide a corresponding time aligned range Pi for each of the N measurements; using each time aligned Range measurement Pi to define a corresponding spherical equation such that N spherical equations are defined; and deriving analytical solutions from three of the N spherical equations to determine the position vector of the object.
    Type: Application
    Filed: September 14, 2007
    Publication date: January 21, 2010
    Applicant: THALES NEDERLAND B.V.
    Inventors: Huub De Waard, Piet Griffioen, Henk Regtop, Gert Van De Brug