System and method using eddy currents to acquire positional data

Details System and method using eddy currents to acquire positional data System and method using eddy currents to acquire positional data

1997-01-23

1998-02-10

O'Shea, Sandra L.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

364563, G01B 726, G01N 2772

Patent

active

057173320

ABSTRACT:
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.

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U.S. Patent application S.N. 07/696,457, entitled "An Apparatus and Method for Non-destructive Testing Using Multi-frequency Eddy Currents" by Kristina H. Hedengren, filed May 6, 1991.
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