Calibration of eddy current profilometry

Details Calibration of eddy current profilometry Calibration of eddy current profilometry

1988-06-06

1990-07-17

Lall, Parshotam S.

Boots, shoes, and leggings

364560, 33504, 73 1J, 324228, G01B 700, G06F 1100

Patent

active

049425455

ABSTRACT:
Calibration of an eddy current probe (24) and associated data acquisition and analysis system (42, 48, 52, 54, 66) is accomplished using a step tube sample (68) having a nominal diameter portion (74) substantially equivalent to a nominal field tube (22). Two readings of eddy current test units are obtained from the step tube sample, and the diameter of the probe is used as a boundary condition on the non-linear response of the probe to variations in tube radius. A calibration curve is generated for use in converting field tube eddy current measurements to field tube radius or profile.

REFERENCES:
patent: 3356938 (1967-12-01), Wood
patent: 3940689 (1976-02-01), Johnson, Jr.
patent: 4292589 (1981-09-01), Bonner
patent: 4320340 (1982-03-01), Lichtenberg
patent: 4611304 (1986-09-01), Butenko et al.
patent: 4750141 (1988-06-01), Judell et al.
patent: 4751461 (1988-06-01), McWhirter et al.
patent: 4766374 (1988-08-01), Glass, III et al.
patent: 4771237 (1988-09-01), Daley

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