Magnetic-disturber detection method and detector, object-localizing method and system, recording medium for these methods

This method for detecting a magnetic disturber method comprises: the measurement (52) of the magnetic field emitted by the emitter by at least two triaxial sensors placed at different known positions, for each sensor, the determining, (54) from the magnetic field measured by this sensor, of the coordinates of a direction vector collinear with an axis passing through the geometrical center of the emitter and the geometrical center of this sensor, the geometrical center of the emitter being the point at which there is located a magnetic field point source which models this emitter and the sensor being capable of being modeled by a point transducer situated at a point where the magnetic field is measured and constituting the geometrical center of this sensor, verification (56;70) that the smallest distance between the axes, each collinear each with one of the direction vectors, is smaller than a predetermined limit, and if this is not the case, the reporting (64) of the presence of a magnetic disturber and, in the contrary situation, not making this report.