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

A detector of a magnetic disturber of a magnetic field emitted by a magnetic field emitter that is at least triaxial, the detector comprising:

• at least two triaxial sensors capable of measuring the magnetic field emitted by the emitter, the sensors being placed at different known positions, and
• a processing unit connected to the sensors to process the measurements of the magnetic field of the emitter, the processing unit being configured for
• determining, for each sensor and from the magnetic field measured by the sensor, coordinates of a direction vector collinear with an axis passing through the geometrical center of the emitter and the geometrical center of the sensor, the geometrical center of the emitter being the point at which there is located a magnetic field point source that models the 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 the sensor,
• determining whether the smallest distance between the axes, each of which is collinear with one of the direction vectors, is smaller than a predetermined limit, and
• if the smallest distance is not smaller than the predetermined limit, reporting the presence of a magnetic disturber.