| 主权项 |
1. A method of compensating a measurement of a magnetic field, the method comprising:
emitting a magnetic field in the presence of a magnetic disturber, by means of a uniaxial source, situated on one side of the magnetic disturber, the magnetic moment of the source being known, determining a position and a magnetic moment of an image of the source situated on the other side of the magnetic disturber using one or more measurements of the emitted magnetic field, the measurements being performed by at least one magnetic sensor whose position and orientation relative to the source are known, the position and the magnetic moment of the image minimizing the following relationship for each sensor:
{right arrow over (B)}me−({right arrow over (B)}S+{right arrow over (B)}I), where:
{right arrow over (B)}me is a magnetic field measured by the sensor in the presence of the magnetic disturber,{right arrow over (B)}S is a magnetic field that would be measured by the sensor in the absence of the magnetic disturber, and{right arrow over (B)}I is a fictitious magnetic field emitted by the image that would be measured by the sensor in the absence of the magnetic disturber, subtracting the magnetic field emitted by the image, constructed from the position and the magnetic moment of the image, from the measurement of the magnetic field made by the sensor in the presence of the magnetic disturber to compensate the measurement, determining the position and magnetic moment of several images of the same source from the same measurements of the magnetic field, the measurements being performed by several sensors whose positions and orientations are known relative to the source, and subtracting the magnetic field emitted by the images from the measurement of the magnetic field performed by a sensor in the presence of the magnetic disturber, thereby compensating for the measurement. |
