Methods and systems for determining heave and heave rate of...

B - Operations – Transporting – 63 – B

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B63B 39/00 (2006.01) G01C 21/16 (2006.01) G01C 23/00 (2006.01) G01P 13/00 (2006.01)

Patent

CA 2487731

A method for determining heave and heave rate for a vessel (40) is described. The vessel (40) includes an inertial navigation system (INS) (10), and sensors (22) for the INS (10) being located at a point A of the vessel (40), the vessel (40) having a zero heave reference point B, and the described method provides heave and heave rate at a point C of the vessel (40). The method includes determining reference coordinates for points A, B, and C of the vessel (40), generating a velocity signal representative of a velocity at a point on the vessel (40), generating a heave rate signal based upon the velocity signal, and generating a heave based upon the heave rate signal.

La présente invention concerne un procédé permettant de déterminer le pilonnement et la vitesse de pilonnement pour un navire (40). Le navire (40) comprend un système de navigation par inertie (INS) (10) et des capteurs (22) d'INS (10) situés au niveau d'un point A du navire (40), le navire (40) présentant un point B de référence de pilonnement zéro, et le procédé susmentionné permet d'obtenir un pilonnement et une vitesse de pilonnement au niveau d'un point C du navire (40). Le procédé consiste à déterminer des coordonnées de référence pour les points A, B et C du navire (40), à générer un signal de vitesse représentatif d'une vitesse au niveau d'un point du navire (40), à générer un signal de vitesse de pilonnement en fonction du signal de vitesse et à générer un pilonnement en fonction du signal de vitesse de pilonnement.

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