Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Reexamination Certificate
2007-11-27
2007-11-27
Patidar, Jay M (Department: 2862)
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
C324S242000, C324S232000, C324S235000
Reexamination Certificate
active
11114507
ABSTRACT:
An RFEC excitation unit and sensor apparatus and method that facilitate detection of cracks or other anomalies within or under a surface and immediately next to an expected structure (such as a rivet) that would otherwise cause a signal change preventing detection of the cracks. In some embodiments, the apparatus includes actuators and control that move the apparatus and analyze sensed RFEC signals to determine the location of the rivet, and then to rotate (mechanically or electronically) the sensed signal and/or excitation signal to maintain a constant relationship to the edge of the rivet in order that signals from the rivet edge are suppressed and signals from the cracks are detected. In some embodiments, the excitation unit is maintained at the center of the rivet surface, and the sensor is moved around the rivet in a circle centered on the rivet.
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Ouyang Tianhe
Sun Yu-shi
Innovative Materials Testing Technologies, Inc.
Lemaire Charles A.
Lemaire Patent Law Firm, P.L.L.C.
Patidar Jay M
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