Method and apparatus for moving along a boundary between electro

Details Method and apparatus for moving along a boundary between electro Method and apparatus for moving along a boundary between electro

1994-11-29

1997-01-07

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

73601, 21912434, 318576, 324233, 324226, 324243, G01B 714, G01N 2904, G05B 1933, B23K 912

Patent

active

055920780

ABSTRACT:
A detector and tracker using a three coil sensor for is disclosed. The detector detects eddy current variations caused by differences in electromagnetic characteristics in two adjacent materials. The eddy current variations are measured and compared to determine the magnitude and direction the detector may be from the center of one of the adjacent materials. The magnitude and direction determination by the detector can be used to drive a process controller to position the sensor.

REFERENCES:
patent: 3017496 (1962-01-01), Greene
patent: 3201562 (1965-08-01), Anderson
patent: 3359486 (1967-12-01), Brosious
patent: 3394303 (1968-07-01), Cressman et al.
patent: 3430134 (1969-02-01), Flaherty et al.
patent: 4303883 (1981-12-01), Mori et al.
patent: 4823082 (1989-04-01), Nasu et al.
Technical Information brochure from Keyence for Welding Position Detector, Dec., 1992, 2 pages.

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