Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Reexamination Certificate
2005-07-12
2005-07-12
Patidar, Jay (Department: 2862)
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
C324S220000, C324S209000, C073S643000
Reexamination Certificate
active
06917196
ABSTRACT:
A method and apparatus for implementing magnetostrictive sensor techniques for the nondestructive evaluation of pipes or tubes. A magnetostrictive sensor generates guided waves in a pipe or tube, which waves travel therethrough in a direction parallel to the longitudinal axis of the pipe or tube. This is achieved by using a magnetized ferromagnetic strip being pressed circumferentially against the pipe or tube. For improved efficiency, the strip may be made from an iron-cobalt alloy. The guided waves are generated in the strip and coupled to the pipe or tube and propagate along the length of said pipe or tube. For detection, the guided waves in the pipe or tube are coupled to the thin ferromagnetic strip and are detected by receiving MsS coils. Reflected guided waves may represent defects in the pipe or tube.
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Choi Myoung-Seon
Crane James F.
Kim Sang-Young
Kwun Hegeon
Gunn & Lee , P.C.
Patidar Jay
Southwest Research Institute
Whittington Kenneth
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