Sysnav

Hendrik Meier

Mathieu Hillion

David Vissiere

Charles-Ivan Chesneau

Jean-Philippe Dugard

David Caruso

The present invention relates to a method for calibrating a gyrometer equipping a vehicle. The method includes a step (a) of acquisition, by the gyrometer, of a measured angular velocity of the vehicle, and, by measuring measured values of at least one quantity representative of the angular velocity of the vehicle. It also includes a step (b) of determination, by a data processor, of values of at least one gyrometer calibration parameter minimising a difference between a first estimated angular velocity of the vehicle and a second estimated angular velocity of the vehicle, wherein the first estimated angular velocity is a function of the measured angular velocity and parameters for calibrating the gyrometer, and the second estimated angular velocity is a function of the measured values of said at least one quantity representative of the angular velocity of the vehicle.

Method for calibrating a gyrometer equipping a vehicle

The present invention relates to a method for calibrating a gyrometer () of an object () moving in an ambient magnetic field, the method being characterised in that it comprises the steps of:

Method for calibrating a gyrometer of an object

A method for calibrating a magnetometer. The magnetometer travels through (Si) a set of path positions, and acquires (S2) a plurality of measurements of the magnetic field. Trajectory information (S3) is provided representative of the location and the orientation of a point integral with the magnetometer. The measurements of the magnetic field are matched up (S4) with the trajectory information. A determination (S5) is made of calibration parameters of the magnetometer by the minimisation of a cost function involving, for a plurality of determination times, at least the calibration parameters, a measurement of the magnetic field, and a relationship linking the change in a magnetic field with the change in the location and in the orientation of the magnetometer derived from the trajectory information.

Method for calibrating a magnetometer

The present invention relates to a method for locating an object () integral with a triaxial magnetic sensor () moving in a magnetic field generated by a set of at least three triaxial magnetic generators () static in a common reference frame, the method being characterised in that it includes the steps of:

Method for locating an object moving in a magnetic field generated by a set of at least three magnetic generators

The present invention relates to a method for calibrating magnetometers () of an object () moving in an ambient magnetic field, the method being characterised in that it comprises the steps of:

Method for calibrating magnetometers of an object

The present invention relates to a method for calibrating a magnetometer () in which the magnetometer () is arranged inside the windings () of a generator (), a magnetic field being generated by the generator (), a series of measurements of the magnetic field with the magnetometer () being carried out by varying the position of the magnetometer () and/or the electric currents in the windings () between each measurement, the electric currents applied in the windings () also being measured, a parametric transfer model being generated from a parametric measurement model of the magnetometer including parameters for calibrating the magnetometer and a parametric model of the magnetic field, the parameters for calibrating the magnetometer () being calculated by an optimisation algorithm from the parametric transfer model and measurements of the magnetic field by the magnetometer and measurements of the currents in the windings.

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Vernon, France

Hendrik Meier