Hand-holdable probe having a flexible eddy current sensor

Details Hand-holdable probe having a flexible eddy current sensor Hand-holdable probe having a flexible eddy current sensor

1997-02-21

1998-11-24

Snow, Walter E.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324237, 324238, 324262, G01R 3312, G01N 2782, G01N 2772

Patent

active

058412778

ABSTRACT:
A probe, such as an eddy current probe, which can be moved by hand to a surface to be tested. A toroidal-shaped first resilient member contacts the bottom face of a support member. An elastic membrane extends over the bore of the first resilient member, contacts the bottom lateral surface of the first resilient member, and is unattached to the radially-inward-facing surface of the first resilient member. A more elastic, second resilient member is placed in the bore, is unattached to the first resilient member, and contacts the bottom surface of the elastic membrane. A flexible, surface-conformable, eddy current sensing coil overlies a portion of the bottom side of the second resilient member. More broadly stated, the probe includes first apparatus, for providing a stand-off distance between the support member and the surface, and second apparatus, which includes a flexible sensor (such as an eddy-current sensing coil), for providing a predetermined force to the surface, the predetermined force being essentially decoupled from any force applied to the surface by the first apparatus.

REFERENCES:
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patent: 4543528 (1985-09-01), Baraona
patent: 5182513 (1993-01-01), Young et al.
patent: 5262722 (1993-11-01), Hedengren et al.
patent: 5315234 (1994-05-01), Sutton, Jr. et al.
patent: 5345514 (1994-09-01), Mahdavieh et al.
patent: 5371462 (1994-12-01), Hedengren et al.
patent: 5389876 (1995-02-01), Hedengren et al.
patent: 5442286 (1995-08-01), Sutton, Jr. et al.

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