Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Reexamination Certificate
2008-05-20
2008-05-20
Aurora, Reena (Department: 2862)
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
C324S235000
Reexamination Certificate
active
11163834
ABSTRACT:
A non-destructive testing device has an excitation coil with a plurality of conductor ribbons attached to a flexible membrane. A frame supports the membrane and incorporates wheels for translation across a surface to be inspected and resilient suspension for maintaining the membrane with the excitation coil and wheels in intimate contact with the surface, the membrane flexing to maintain contact with a smoothly curved surface as found in aircraft structures. A magnetoresitive (MR) array is supported within the frame inserted in the membrane to be in close proximity to the surface. The MR array detects the magnetic field resulting from the eddy currents created by the excitation coil for identification of cracks or features beneath the surface under inspection.
REFERENCES:
patent: 4271393 (1981-06-01), Hansen et al.
patent: 5841277 (1998-11-01), Hedengren et al.
patent: 6150809 (2000-11-01), Tiernan et al.
patent: 2007/0100579 (2007-05-01), Rempt et al.
Perry George A.
Rempt Raymond D.
Aurora Reena
Fischer Felix L.
The Boeing Company
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