| 摘要 |
The device object of this patent is composed of:-one box ( 1 ) which is U-shaped in its transversal section;-two guiding plates ( 2 ) for the magnets ( 4 );-two L-shaped rolled sections ( 3 ), which constitute the magnets ( 4 ) pole pieces;-various magnets ( 4 ) placed parallelly to the ferromagnetic insert ( 8 ) to be tested; each magnet ( 4 ) is placed parallel to the ferromagnetic insert ( 8 ) sliding direction with respect to the device and vice versa;-various measuring coils ( 5 ) placed in a housing ( 6 ), which is U-shaped in its transversal section;-a covering plate ( 7 ) fixed to box ( 1 ) in such a way to occupy the device side facing the insert ( 8 ) to be tested;-simple gears permitting to direct, in following times, the coils ( 5 ) parallelly to the different angles of the ferromagnetic insert ( 8 ) layers.
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