Calibration method for a triaxial sensor with selection of a calibration method as a function of the spatial distribution of measurements

摘要

A method of calibrating a triaxial sensor such as a magnetometer. The method includes steps (DIS) to calculate a spatial distribution indicator of a set of measurements output by the sensor, and to determine (AJS), using a fitting method, parameters of a parametric surface that can be used to fit said surface to the set of measurements. The fitting method is selected from among several predetermined fitting methods as a function of the spatial distribution indicator. The predetermined fitting methods may include an ellipsoid fitting method, a sphere fitting method, a sphere fitting method and a two-step fitting method consisting of a first fitting to a sphere followed by a second fitting to an ellipsoid, the centre of which is coincident with the centre of the sphere of the first fitting.