POINTER WITH MOTION SENSING RESOLVED BY DATA MERGING

摘要

The invention applies to a pointing device of a mobile element, for example a cursor, on a plane surface. The pointing device comprises a first sensor for measuring the angular rates of the device and a second sensor for the linear accelerations along three dimensions of said device. Preferably, the first sensor is a gyrometer with two or three axes and the second sensor is a three-axis accelerometer. The invention makes it possible to render the motions of the mobile element in the surface of the orientation in which the pointing device is held by its user. This result is achieved by global resolution of the angles of torsion by virtue of the combining of the measurements of the first and second sensors either within an extended Kalman filter or by applying an optimization criterion.