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2 018 965

(13)

C1

(51)

IPC

(21) (22)

Application

4868636/24, 1990-09-25

(22)

Actual filing date

1990-09-25

(45)

Published

1994-08-30

(72)

Inventor

Shajdurov G.Ja.

(73)

Holder

Krasnojarskij Politekhnicheskij Institut

DEVICE FOR DETECTING LEAKAGE IN UNDERGROUND PIPE-LINES Russian patent published in 1994 - IPC

Abstract RU 2018965 C1

FIELD: electromagnetic devices. SUBSTANCE: device has two radiation sources with exciting frequencies f1 and f2, which induce currents in tested pipe-line. Receiving magnetic aerials for receiving information signals at frequencies f1, f2 are moved apart and connected differentially. The other aerials are joined and disposed in center between the aerial moved apart. Mutual correlation processing of signal is performed in the device. EFFECT: improved noise immunity of measurements. 2 dwg

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RU 2 018 965 C1

Authors

Shajdurov G.Ja.

Dates

1994-08-30—Published

1990-09-25—Filed

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