| 摘要 |
<p>A dimension-gauging system (1) to determine at least one dimension (d) of a non-ferrous, electrically conducting object (5) produces a magnetic field (8) inside the object (5) and changes the excitation (X) of the magnetic field. A signal processing unit (11) measures the reaction (9, 10) of the magnetic field to the change in excitation (X), obtains an actual field transfer function (H) between the excitation (X) and the measured field reaction (Y<SUB>A</SUB>, Y<SUB>B</SUB>) and determines the at least one dimension (d) of the object (5) by fitting the measured field transfer function (H) to a predetermined field transfer function (G(d)), where the predetermined field transfer function (G(d)), represents the dynamic behaviour between the excitation (X) and the measured field reaction (Y<SUB>A</SUB>, Y<SUB>B</SUB>) with the one dimension (d) as a parameter.</p> |
