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Patent Number: |
RE36979 |
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Case ID: |
77436 |
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Patent Title:
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Surface conforming flexible eddy current probe for scanning varying surface contours |
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Status: |
ACTIVE |
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Status Date: |
11/13/2003 12:39:10 PM |
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Issue Date:
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12/5/2000 |
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Filed Date:
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12/13/1995 |
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Serial #:
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572204 |
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Assignee Name:
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The United States of America as represented by the Secretary of the Navy (Washington, DC) |
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Inventor(s):
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Vernon, Susan N. ,Liu, John M. |
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Licensee: |
Field of Use: |
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License Date: |
1/9/1922 |
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Field of Use: |
Field of Use: |
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The invention described herein may be manufactured and used by or for the
Government of the United States of America for governmental purposes
without the payment of any royalties thereon or therefor.
FIELD OF THE INVENTION
This invention relates to an electromagnetic test device for characterizing
materials in terms of electromagnetic properties and localized anomalies.
More specifically, the invention relates to eddy current probe core that
serves to focus the electromagnetic field and is flexible to allow
scanning of curved or irregular surfaces.
BACKGROUND OF THE INVENTION
Historically eddy current methods have been used to detect surface, or near
surface, anomalies. When applied to carbon fiber reinforced composite
materials, eddy current methods can be used to detect and measure a wide
variety of anomalies, including the broken fibers associated with impact
damage, misaligned fibers, and incomplete . . . . More |
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A flexible core eddy current probe is disclosed for testing of curved or
egular surfaces. The core is comprised of a flexible binder loaded with a
powdered magnetic material and then formed into a specific flexible core
shape continuously adaptable to irregular or curved surfaces. The flexible
core probe has specific application to carbon fiber reinforced composite
components having contoured surfaces.
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What we claim is:
1. A surface conforming flexible core eddy current probe for inspection of
curved or irregular surfaces comprising:
a quantity of flexible binding material;
a quantity of powdered magnetic material mixed in said flexible binding
material whereby said quantity of powdered magnetic material comprises 49
to 99 percent by weight of the mixture of said binding material and said
powdered magnetic material, forming a surface conforming eddy current
probe core, and
a coil of wire in close proximity to the mixture of said binding materials
and said powdered material whereby an electromagnetic field is generated
around said coil and focused by the mixture of said binding material and
said powdered material forming the field of energy which is coupled to the
curved or irregular surface to be inspected.
2. A flexible core eddy current probe according to claim 1 wherein said
quantity of powde . . . . More |
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