Electrical defect detector for circuit lines

Details Electrical defect detector for circuit lines Electrical defect detector for circuit lines

1994-04-29

1995-11-21

Nguyen, Vinh P.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324607, 324622, G01R 1925

Patent

active

054690510

ABSTRACT:
A device which detects conductors, the device has a portion which applies a current to a conductor consisting of a first frequency signal and a second frequency signal. The frequency of the second frequency signal is double the frequency of the first frequency signal. The device has another portion which detects a DC voltage across the conductor. An adjusting portion adjusts a phase of the first frequency signal relative to a phase of the second frequency signal to produce a zero detected DC voltage across a representative length of conductor known to be free of defects.

REFERENCES:
patent: 3299351 (1967-01-01), Williams
patent: 3500188 (1970-03-01), Whitley
patent: 3991363 (1976-11-01), Lathrop
patent: 4039938 (1977-08-01), Link
patent: 4496900 (1985-01-01), DiStefano et al.
patent: 4837502 (1989-06-01), Ugenti
patent: 4868506 (1989-09-01), DiStefano et al.
patent: 4871971 (1989-10-01), Jeerings et al.
patent: 5044766 (1991-09-01), Stuart
Journal Appl. Phys. 49 (2), Feb. 1978 pp. 717-722 entitled.
"Pulse nonlinearity measurements on thin conducting films" by A. T. English, G. L. Miller, D. A. H. Robinson, L. V. Dodd and T. Chynoweth IEEE Transactions On Instrumentation and Measurement vol. IM-34 No. 4.
Dec. 1985, pp. 590-593 entitled "Application of Nonlinearity Measuring Method Using Two Frequencies to Electrical Components by Makoto Kanno and Isao Minowa".

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