Rotatable orientation independent gravity sensor and methods...

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G01P 21/00 (2006.01) E21B 47/04 (2006.01) G01P 15/02 (2006.01)

Patent

CA 2745752

A method to correct for a systematic error of a sensor having a plurality of accelerometers configured to measure gravitational acceleration, the method including: rotating the plurality of accelerometers about a first axis; obtaining a first set of calibration measurements from the plurality of accelerometers from the rotation about the first axis; determining a first systematic error for each accelerometer in the plurality using the first set of calibration measurements; and removing the first systematic error from sensor measurements to correct for the systematic error.

L'invention concerne un procédé conçu pour corriger une erreur systématique d'un capteur comprenant plusieurs accéléromètres élaborés pour mesurer l'accélération gravitationnelle. Ce procédé consiste à faire tourner la pluralité d'accéléromètres autour d'un premier axe, à obtenir un premier ensemble de mesures d'étalonnage provenant de la pluralité d'accéléromètres à partir de la rotation autour du premier axe, à déterminer une première erreur systématique pour chaque accéléromètre de la pluralité d'accéléromètres au moyen d'un premier ensemble de mesures d'étalonnage, et à supprimer la première erreur systématique des mesures du capteur afin de corriger l'erreur systématique.

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