Patent EP0131195A2 successfully refreshed from Google Patents.
Patent EP0091087A1 successfully refreshed from Google Patents.
EP0091087A1
Expired / Lapsed
EP
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Method of detecting a leakage of fluid
Assignee: Hitachi Ltd
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Filing: 1983-03-30
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Granted: —
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Expires: 2003-03-30
Abstract
Abstract A method of detecting a leakage of fluid is disclosed, in which a leaking sound, which is produced when the pipe is broken and propagates through the pipe, is detected by a couple of acoustic sensors (A, B) mounted to a pipe (C) through which fluid flows at portions separated from each other with a proper distance, the amplitudes of a plurality of different frequency components extracted from the output signals of the acoustic sensors are obtained and then a leaking location of fluid in the pipe and a leaking amount of fluid are determined on the basis of these amplitudes.
Inventors
- 👤 Sakae Sugiyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 01:53
CPC Classifications
F; F17; F17D; F17D5/00; F17D5/02; F17D5/06; G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/24; G01M3/243
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
A method of detecting a leakage of fluid comprising the steps of: detecting a leaking sound of fluid by a plurality of acoustic sensors (9, 10) separately mounted to a pipe (5) through which fluid flows; obtaining amplitudes of a plurality of different frequency components extracted from the output signals from said acoustic sensors; and determining a leaking location of fluid of said pipe on the basis of said amplitudes.
Claim 2
Independent Claim
70 words
A method of detecting a leakage of fluid comprising the steps of: detecting a leaking sound of fluid by a plurality of acoustic sensors (9, 10) separately mounted to a pipe (5) through which fluid flows; obtaining amplitudes of a plurality of different frequency components extracted from the output signals from said acoustic sensors; and determining a leaking location of fluid of said pipe on the basis of said amplitudes.
Claim 3
Dependent Claim
29 words
A method of detecting a leakage of fluid according to claim 1, further comprising the step of determining an amount of leaking fluid on the basis of said amplitudes.
Claim 4
Dependent Claim
56 words
A method of detecting a leakage of fluid according to claim 2, further comprising the step of determining an opening area of a broken part of said pipe on the basis of a differential pressure between a first pressure in said pipe and a second pressure outside said pipe, and the amount of the leaking fluid.
Claim 5
Independent Claim
70 words
A method of detecting a leakage of fluid comprising the steps of: detecting a leaking sound of fluid by a plurality of acoustic sensors separately mounted to a pipe through which fluid flows in a plant; obtaining amplitudes of a plurality of different frequency components extracted from the output signals from said acoustic sensors; and determining a leaking location of fluid of said pipe on the basis of said amplitudes.
Claim 6
Independent Claim
70 words
A method of detecting a leakage of fluid comprising the steps of: detecting a leaking sound of fluid by a plurality of acoustic sensors separately mounted to a pipe through which fluid flows in a plant; obtaining amplitudes of a plurality of different frequency components extracted from the output signals from said acoustic sensors; and determining a leaking location of fluid of said pipe on the basis of said amplitudes.
Claim 7
Dependent Claim
29 words
A method of detecting a leakage of fluid according to claim 4, further comprising the step of determining an amount of leaking fluid on the basis of said amplitudes.
Claim 8
Dependent Claim
34 words
A method of detecting a leakage of fluid according to claim 5, further comprising the step of stopping the operation of said plant wherein when said amount of leaking fluid exceeds a set value.
Claim 9
Dependent Claim
42 words
A method of detecting a leakage of fluid according to claim 5, wherein said plant is a nuclear reactor plant, and further comprising the step of scraming said nuclear reactor plant when said amount of a leaking fluid exceeds a set value.
References Cited (Backward Citations)
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