Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1978-05-12
1980-06-03
Rolinec, Rudolph V.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
73 405R, 340605, G01R 2726, G01M 318, G08B 2100
Patent
active
042064023
ABSTRACT:
A system for detecting fluid-leak in a pipeline or tank is disclosed, which includes a sensing coaxial cable having an outer conductor divided into a plurality of sections and a continuous inner conductor, the coaxial cable being permeable to oily fluids so that the distributed capacity of the coaxial cable can be changed upon penetration by the fluids. Whether or not the change has occurred may be detected by supplying an oscillator signal to each section of the outer conductor to measure an output from the inner conductor at a low frequency signal operational amplifier.
REFERENCES:
patent: 3564526 (1971-02-01), Butts
patent: 3800219 (1974-03-01), Fosberg
patent: 4029889 (1977-06-01), Mizuochi
patent: 4041771 (1977-08-01), Allan et al.
patent: 4043180 (1977-08-01), Morris et al.
patent: 4095174 (1978-06-01), Ishido
patent: 4112355 (1978-09-01), Gibson, Jr. et al.
Karlsen Ernest F.
Oujevolk George B.
Rolinec Rudolph V.
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