| 摘要 |
<p>The system of the invention includes a magnetic field generator (30), a guiding device (16) for the valuable article (12) for passing the valuable article (12) into the magnetic field along a travel path (26) so that the valuable article (12) modifies the magnetic field, a magnetic field sensor (38), and a device (48, 54) for checking the validity of the valuable article (12) based on a modification of the magnetic field measured by the sensor (38) upon the passage of the valuable article (12). The magnetic field is a time-permanent magnetic field at least during the passage of the valuable article (12), and the magnetic field sensor (38) is a giant magnetoresistance sensor.</p> |
