Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

David Dominique

Tristan Hautson

Timothée Jobert

Saifeddine Aloui

Andréa Vassilev

Locating a moving magnetic object includes determining its position or orientation from measurements from an array N tri-axial magnetometers (N&#x3e;5) mechanically linked to one another with 0-DOF by repeatedly estimating its position relative to the array from measurements made either in a preceding iteration or from a sensor distinct from the array's magnetometers before making a new measurement using the array's magnetometers; computing the distance between each magnetometer and the object's estimated position; eliminating Ni magnetometers closest to this estimated position, where Ni&#x3c;N; using the remaining magnetometers, making a new measurement of the field generated or modified by the object; and determining its new position or orientation from the new measurements so as to obtain the object's new location.

Method and device for locating a magnetic object

A method of detecting a point of contact between a tip of an instrument and a writing support, the instrument being one of a pen and an eraser, and the method comprising determining, with the aid of a magnetic object fixed without any degree of freedom on the instrument, the height of a point of the instrument with respect to a bearing face of a tablet. The bearing face constituting the writing support or supporting the writing support. The method further includes: comparing the height determined with a preconfigured contact threshold, and detecting a point of contact between the tip of the instrument and the writing support if the height determined is less than the contact threshold and, in the converse case, detecting no point of contact between the tip of the instrument and the writing support.

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Claix, France

David Dominique