Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Reexamination Certificate
2007-12-04
2007-12-04
Aurora, Reena (Department: 2862)
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
C324S235000, C324S225000, C324S252000
Reexamination Certificate
active
11289017
ABSTRACT:
There is provided an inspection device for the detection of flaws in a component. The inspection device comprises a magnetic field generator, a first array of magnetoresistive sensors and a second array of magnetoresistive sensors, in which the second array is substantially orthogonal to the first array. The signals generated by the first and second arrays are utilized by a processing element to determine a curl of the magnetic field signals effected by the eddy currents including the eddy currents encountering a flaw in the component. The curl of the magnetic field signals is then used to better illustrate the existence of the flaw and various parameters of the flaw. The magnetic field generator comprises a coil or linear arrays of conductors. The inspection device is preferably contained (1) within a hand-held housing or (2) mounted on any automated inspection platform, and advantageously comprises a display for illustration of the detected flaw.
REFERENCES:
patent: 5485084 (1996-01-01), Duncan et al.
patent: 5510709 (1996-04-01), Hurley et al.
patent: 5554933 (1996-09-01), Logue
patent: 5842986 (1998-12-01), Avrin et al.
patent: 5864229 (1999-01-01), Lund
patent: 6150809 (2000-11-01), Tiernan et al.
patent: 6504363 (2003-01-01), Dogaru et al.
patent: 6693425 (2004-02-01), Wache
patent: 2003/0016131 (2003-01-01), Nelson
patent: 2003/0080735 (2003-05-01), Wache
William F. Arvin and Raymond D. Rempt;Detection of Deep Flaws In Aluminum Structure With Magnetoresistive Sensors; Review of Progress in Quantitative Nondestructive Evaluation; 1998; pp. 1039-1042, vol. 17; Plenum Press; New York.
William F. Arvin;Magnetoresistive Eddy-Current Sensor For Detecting Deeply Buried Flaws; Review of Progress in Quantitative Nondestructive Evaluation; 1996; pp. 1145-1150; vol. 15; Plenum Press; New York.
Hiroshi Hoshikawa and Kiyoshi Koyama;Uniform Eddy Current Probe With Little Disrupting Noise; Review of Progress in Quantitative Nondestructive Evaluation; 1998; pp. 1059-1066; vol. 17, Plenum Press; New York.
Kiyoshi Koyama and Hiroshi Hoshikawa;Basic Study Of A New ECT Probe Using Uniform Rotating Direction Eddy Current; Review of Progress in Quantitative Nondestructive Evaluation; 1997; pp. 1067-1074; vol. 16; Plenum Press; New York.
William F. Arvin;Eddy Current Measurements With Magneto-Resistive Sensors: Third-Layer Flaw Detection In A Wing-Splice Structure 25 mm Thick; Nondestructive Evaluation of Aging Aircraft, Airports and Aerospace Hardware IV; Proceedings of SPIE; 2000; pp. 29-36; vol. 3994.
Buzz Wincheski and Min Namkung;Deep Flaw Detection With Giant Magnetoresistive(GMR)Based Self-Nulling Probe, date unknown.
J.P. Fulton, B. Wincheski, S. Nath and M. Namkung;Mutual Inductance Problem For A System Consisting Of A Current Sheet And A Thin Metal Plate, date unknown.
David Pappas;Applications Of Magnetic Sensors; National Institute of Standards and Technology, date unknown.
Buzz Wincheski; Min Namkung and John Simpson;Magnetoresistive Sensor Based Rotating Probe System For Detection Of Deep Fatigue Cracks Under Airframe Fasteners; The Fourth Joint NASA/FAA/Dod Conference on Aging Aircraft; 2000; pp. 1-10, 2000.
Buzz Wincheski and Min Namkung;Electromagnetic Detection Of Fatigue Cracks Under Protruding Head Ferromagnetic Fasteners; pp. 1-9, date unknown.
Teodor Dogaru, Carl H. Smith, Robert W. Schneider and Stuart T. Smith;New Directions In Eddy Current Sensing; http://www.sensorsmag.com/articles/0601/56/main.shtml, Mar. 5, 2004.
Teodor Dogaru and Stuart T. Smith;Integrated Giant Magnetoresistive Transducer For Eddy Current Testing; http://www.ndt.net/article/wendt00/papers/idn565/idn565.htm, Mar. 8, 2004.
Teodor Dogaru and Stuart T. Smith;Novel eddy current probes for detection of deep cracks around fastener holes; http://www.jcaa.us/AA—Conference—2001/Papers/2B—2.pdf.
Alston & Bird LLP
Aurora Reena
The Boeing Company
LandOfFree
Eddy current inspection device with arrays of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Eddy current inspection device with arrays of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Eddy current inspection device with arrays of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3835780