| 摘要 |
<p>It is presented an arrangement (1-1) for detecting cracks (C) along a strip (S) of a metallic material (M) moving in relation to the arrangement (1-1). The arrangement (1-1) comprises a coil arrangement (3-1) having: a first winding portion (5a) extending in a first direction for inducing a first current (i 1 ) in the first direction in a portion of the strip (S); a second winding portion (5b) extending in a second direction for inducing a second current (i 2 ) in the second direction in the portion of the strip (S), the first direction and the second direction intersecting each other; a first receiver coil (7) arranged to detect a magnetic field generated by the first current (i 1 ); and a second receiver coil (9) arranged to detect a magnetic field generated by the second current (i 2 ), the magnetic field generated by the first current (i 1 ) and the magnetic field generated by the second current (i 2 ) providing a measure of whether a crack is present in the portion of the strip.</p> |
