General Electric Company

Richard O McCary

Israel S Jacobs

Fred E Luborsky

Joseph J Becker

Kristina H Hedengren

William P Kornrumpf

Robert P Alley

Richard J Charles

John D Young

Jish M Wang

A system and method for determining fiber-depth of at least one layer of reinforcing fibers within an electrically conductive workpiece is provided. The system comprises an eddy current probe having one or more eddy current elements for generating a respective electrical signal indicative of a spacing with respect to a predetermined section of the reinforcing fibers. A signal processor is connected to the eddy current probe to receive and to process each spacing-indication electrical signal so as to generate data indicative of fiber-depth of the predetermined section relative to a workpiece surface. A display device may be connected to the signal processor to provide visual indicia representative of the fiber depth. Further a controller may be connected to receive and store the fiber-depth data which can be used by a machining device for selectively removing material from the workpiece surface, in accordance with the stored fiber-depth data. The eddy current elements may form a substantially colinear row of eddy current elements each cooperating to determine the actual fiber axis orientation of reinforcing fibers within the workpiece.

System and method using eddy currents to acquire positional data

An eddy current probe array is disclosed comprising a plurality of spatially correlated eddy current probe elements sufficiently disposed within a flexible interconnecting structure to collect a discrete plurality of spatially correlated eddy current measurements for nondestructive near surface flaw detection. A plurality of precisely fabricated, substantially identical elements being sufficiently distributed can accommodate inspecting an area of conductor covered by the active width of the array in a single uni-directional scan. The array structure can flexibly conform to accommodate inspection of large, irregular, curved conductive surfaces which cannot be inspected by conventional means.

Flexible eddy current surface measurement array for detecting near

Amorphous magnetic metal alloys are processed by annealing at temperatures sufficient to achieve stress relief and cooling in directed magnetic fields or in zero magnetic fields. The ac and dc properties of magnetic cores produced in accordance with the processes of the invention may be tailored to match those of a wide range of magnetic alloys. Alloys processed in accordance with the invention provide improved performance in inductors, transformers, magnetometers, and electrodeless lamps.

Treatment of amorphous magnetic alloys to produce a wide range of

The signal-to-noise ratio as measured by the ratio of the full select magnetic field levels to the half select magnetic field levels, is improved in a coincident current magnetic printing head by providing means for producing a bias magnetic field which is at least somewhat opposed to the signal magnetic fields.

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Schenectady, NY, United States of America

Richard O McCary