Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1975-08-06
1977-09-13
Krawczewicz, Stanley T.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 57Q, 324 57SS, 324 585A, 324 65R, 324DIG1, G01R 2700
Patent
active
040485587
ABSTRACT:
Metal failures are detected in situ, for example, in the piping system of a nuclear reactor or a pipeline by passing a current through the metal in which the failures are to be detected at various frequencies and monitoring the impedance. By using various frequencies the present invention makes use of the skin effect thereby enabling, through detection of differences in impedance at different frequencies the determination of the depth of a crack or the like in the metal.
REFERENCES:
patent: 2150922 (1939-03-01), Hay
patent: 2293024 (1942-08-01), Klipsch
patent: 2304739 (1942-12-01), Minton
patent: 2654067 (1953-09-01), Bruce
patent: 2671200 (1954-03-01), Lederer
patent: 3135914 (1964-06-01), Callan et al.
patent: 3163817 (1964-12-01), Simpson
patent: 3310736 (1967-03-01), Bayly et al.
patent: 3323352 (1967-06-01), Branson
patent: 3340466 (1967-09-01), Ono
patent: 3437810 (1969-04-01), Wood et al.
patent: 3612535 (1971-10-01), Davis
patent: 3774185 (1973-11-01), Parth
patent: 3818758 (1974-06-01), Easter
New Crack Detector, Electrical Review, July 28, 1944, p. 125.
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