Method of sensing the motion of a solid, using an absolute measurement that is associated with a measurement calculated by double integration
AssigneeCommissariat a l'Energie Atomique
InventorDominique David
Life of this patent
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Abstract
A method for measuring movement of a solid, using an absolute measurement associated with a double integration measurement. The method can be applied in particular to sensing movements of the human body and includes a series of measurement of the acceleration of the solid and double integration of the measurements to obtain successive values of a first translation of the solid, and a series of absolute measurements of at least one second degree of freedom of the solid, namely a rotation, and this measurement of rotation is converted into a measurement of translation used to update the first translation.
Claims9
A method for measuring movement of a solid, in which at least one first translation of the solid is measured, the method comprising:
- a series of measuring acceleration of the solid and making double integration of the measurements, to obtain successive values of the first translation;
- a series of absolute measurement of at least one second degree of freedom of the solid, the second degree of freedom being a rotation, by at least one rotation sensor;
- converting the measurement of rotation into a measurement of translation;
- and
- using the translation measurement to update the first translation,
- wherein a criterion of slowness of movement is chosen, and when the movement meets this criterion after one of the measurements of the second degree of freedom, the measurement of the second degree of freedom obtained is used to update the first translation.
Dependencies are inferred from the claim text.