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2 216 687

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IPC

(21) (22)

Application

2001135648/06, 2001-12-18

(24)

Start date

2001-12-18

(22)

Actual filing date

2001-12-18

(45)

Published

2003-11-20

(72)

Inventor

Dikarev V.I.Karmazinov F.V.Kojnash B.V.Prjadkin E.I.

(73)

Holder

Dikarev Viktor IvanovichKarmazinov Feliks VladimirovichKojnash Boris Vasil'EvichPrjadkin Evgenij Ivanovich

DEVICE FOR LOCATION OF LEAKAGE IN UNDERGROUND PIPE LINES Russian patent published in 2003 - IPC

Abstract RU 2216687 C2

FIELD: electromagnetic leak detectors. SUBSTANCE: proposed device is proposed with two 90-deg. phase shifters, second multiplier, second integrator, two squarers, adder and square root extracting units; connected in series to output of first low-frequency amplifier are first 90-deg. phase shifter, second multiplier whose second input is connected via second 90-deg. phase shifter with output of second low-frequency amplifier, second integrator, first squarer, adder whose second input is connected via second squarer with output of first integrator and square root extracting unit whose output is connected with input of threshold member. EFFECT: enhanced reliability of detection due to square correlation processing of signals. 3 dwg

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RU 2 216 687 C2

Authors

Dikarev V.I.

Karmazinov F.V.

Kojnash B.V.

Prjadkin E.I.

Dates

2003-11-20—Published

2001-12-18—Filed