Patents Assigned to ISKN
  • Patent number: 11016602
    Abstract: A method for locating at least one movable magnetic object relative to a network of at least N tri-axial magnetometers linked together mechanically with no degree of freedom to retain a known relative position of these magnetometers, N being an integer number at least equal to 2, comprises, continuously: a step of detection of a magnetometer capable of being magnetized, i.e. capable of delivering as output measurements comprising a measurement bias following a magnetization; a step of correction, by means of a correction bias, of the measurements delivered by the magnetometer capable of being magnetized, the correction bias corresponding to a deviation between the measurements supplied by the magnetometer as input for a location filtering and the estimations, upon the location filtering, of the data delivered by the magnetometer; and a step of consideration of the magnetometer as not capable of being magnetized, by taking into account the step of correction of the magnetometer capable of being magnetized.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: May 25, 2021
    Assignee: ISKN
    Inventors: Tristan Hautson, Rabeb Aloui
  • Patent number: 10585166
    Abstract: The invention is a method for tracking a position of a magnet moving relative to a magnetometer array. On the basis of the magnetic field detected by each magnetometer of the array, the position of the magnet is estimated. This estimation is based on taking into account a reference magnetic field established beforehand, this reference magnetic field being subtracted from the magnetic field detected by each magnetometer, so as to form a differential measurement. The various successive estimations of the position of the magnet allow its path to be tracked.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: March 10, 2020
    Assignee: ISKN
    Inventor: Tristan Hautson
  • Publication number: 20190301848
    Abstract: A method for estimating an angular deviation between a reference axis of a magnetic object and a magnetic axis co-linear to a magnetic moment of the magnetic object, including: a) positioning the magnetic object facing at least one magnetometer; b) rotating the magnetic object about the reference axis; c) measuring, during the rotating, the magnetic field, using the magnetomenter; and d) estimating the angular deviation from the magnetic field measurements.
    Type: Application
    Filed: July 10, 2017
    Publication date: October 3, 2019
    Applicants: ISKN, COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Saifeddine ALOUI, Franck VIAL, Jean-Marie DUPRE LA TOUR, Guilhem SAUVAGNAC, Tristan HAUTSON
  • Patent number: 10095326
    Abstract: A method is provided for continuously detecting a state of contact or non-contact between a tip of an instrument and a writing surface of a writing medium of variable thickness positioned on a bearing surface of a tracking device.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: October 9, 2018
    Assignee: ISKN
    Inventors: Rabeb Aloui, Tristan Hautson
  • Patent number: 10095325
    Abstract: A method for locating at least one movable magnetic object with respect to an array of at least N triaxial magnetometers comprises steps consisting in: subtracting a weighted average from each of the measurements to obtain modified measurement; loading the modified measurements and a location of the one or more movable magnetic objects at the current time as input into a filtering operation for locating the one or more movable magnetic objects; implementing the location filtering operation, this comprises steps consisting in: subtracting a weighted average from each of the estimated data; and delivering as output a location of the one or more movable magnetic objects at a subsequent time.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: October 9, 2018
    Assignee: ISKN
    Inventors: Tristan Hautson, Rabeb Aloui