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Patent US6526358B1 successfully refreshed from Google Patents.
US6526358B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Model-based detection of leaks and blockages in fluid handling systems
Assignee: General Electric Co
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Filing: 2000-09-25
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Granted: 2003-02-25
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Expires: 2020-09-25
Abstract
Abstract A fault detection and isolation system for detecting leaks and blockages in a fluid handling system having at least one component through which fluid flows includes sensors for measuring fluid conditions upstream and downstream of the component. The sensors generate signals that are representative of the upstream and downstream fluid conditions and are fed to a control algorithm. The control algorithm uses the measured fluid conditions to generate estimates of an inlet state for the component and an outlet state for the component. The control algorithm also calculates innovation sequences for the estimated inlet and outlet states, and then compares the innovation sequences to predetermined thresholds to detect leaks and blockages.
Inventors
- 👤 Harry Kirk Mathews, Jr.
- 👤 Anju Narendra
- 👤 Ravi Rajamani
- 👤 Bruce G. Norman
- 👤 John Harry Down
- 👤 Sal A. Leone
- 👤 Jonathan Carl Thatcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:08
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/26
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
95 words
A fault detection and isolation system for detecting leaks and blockages in a fluid handling system having at least one component through which fluid flows, said fault detection and isolation system comprising: means for measuring fluid conditions upstream of said component; means for measuring fluid conditions downstream of said component; means for generating estimates of an inlet state for said component and an outlet state for said component; means for calculating innovation sequences for said estimated inlet and outlet states; and means for comparing said innovation sequences to predetermined thresholds to detect leaks and blockages.
Claim 2
Dependent Claim
95 words
A fault detection and isolation system for detecting leaks and blockages in a fluid handling system having at least one component through which fluid flows, said fault detection and isolation system comprising: means for measuring fluid conditions upstream of said component; means for measuring fluid conditions downstream of said component; means for generating estimates of an inlet state for said component and an outlet state for said component; means for calculating innovation sequences for said estimated inlet and outlet states; and means for comparing said innovation sequences to predetermined thresholds to detect leaks and blockages.
Claim 3
Dependent Claim
57 words
The fault detection and isolation system of claim 1 wherein said means for measuring fluid conditions upstream of said component generates signals representing fluid pressure, temperature and flow rate upstream of said component and said means for measuring fluid conditions downstream of said component generates signals representing fluid pressure, temperature and flow rate downstream of said component.
Claim 4
Dependent Claim
43 words
The fault detection and isolation system of claim 2 wherein said means for generating estimates receives said signals representing fluid pressure, temperature and flow rate upstream of said component and said signals representing fluid pressure, temperature and flow rate downstream of said component.
Claim 5
Dependent Claim
33 words
The fault detection and isolation system of claim 2 wherein said means for generating estimates generates estimates of an inlet pressure state for said component and an outlet pressure state for said component.
Claim 6
Dependent Claim
49 words
The fault detection and isolation system of claim 4 wherein said means for calculating innovation sequences receives said signals representing fluid pressure upstream of said component and fluid pressure downstream of said component and signals from said means for generating estimates representing said estimated inlet and outlet pressure states.
Claim 7
Dependent Claim
33 words
The fault detection and isolation system of claim 2 wherein said means for generating estimates generates estimates of an inlet flow state for said component and an outlet flow state for said component.
Claim 8
Dependent Claim
49 words
The fault detection and isolation system of claim 6 wherein said means for calculating innovation sequences receives said signals representing flow rate upstream of said component and flow rate downstream of said component and signals from said means for generating estimates representing said estimated inlet and outlet flow states.
Claim 9
Dependent Claim
21 words
The fault detection and isolation system of claim 1 wherein said means for generating estimates is based on a Kalman filter.
Claim 10
Dependent Claim
27 words
The fault detection and isolation system of claim 1 wherein said means for comparing utilizes a multiple hypothesis statistical test to detect and isolate leaks and blockages.
Claim 11
Dependent Claim
168 words
For use with a gas turbine having a plurality of components and a steam cooling circuit for cooling said components, a fault detection and isolation system for detecting leaks and blockages in said steam cooling circuit, said fault detection and isolation system comprising: input sensors for measuring the pressure, temperature and flow rate of steam entering said gas turbine, said input sensors generating signals representing said pressure, temperature and flow rate of steam entering said gas turbine; output sensors for measuring the pressure, temperature and flow rate of steam exiting said gas turbine, said output sensors generating signals representing said pressure, temperature and flow rate of steam exiting said gas turbine; means for generating estimates of an inlet state for at least one of said components and an outlet state for said at least one component; means for calculating innovation sequences for said estimated inlet and outlet states; and means for comparing said innovation sequences to predetermined thresholds to detect leaks and blockages in said steam cooling circuit.
Claim 12
Dependent Claim
168 words
For use with a gas turbine having a plurality of components and a steam cooling circuit for cooling said components, a fault detection and isolation system for detecting leaks and blockages in said steam cooling circuit, said fault detection and isolation system comprising: input sensors for measuring the pressure, temperature and flow rate of steam entering said gas turbine, said input sensors generating signals representing said pressure, temperature and flow rate of steam entering said gas turbine; output sensors for measuring the pressure, temperature and flow rate of steam exiting said gas turbine, said output sensors generating signals representing said pressure, temperature and flow rate of steam exiting said gas turbine; means for generating estimates of an inlet state for at least one of said components and an outlet state for said at least one component; means for calculating innovation sequences for said estimated inlet and outlet states; and means for comparing said innovation sequences to predetermined thresholds to detect leaks and blockages in said steam cooling circuit.
Claim 13
Dependent Claim
47 words
The fault detection and isolation system of claim 10 wherein said means for generating estimates receives said signals representing said pressure, temperature and flow rate of steam entering said gas turbine and said signals representing said pressure, temperature and flow rate of steam exiting said gas turbine.
Claim 14
Dependent Claim
33 words
The fault detection and isolation system of claim 10 wherein said means for generating estimates generates estimates of an inlet pressure state for said component and an outlet pressure state for said component.
Claim 15
Dependent Claim
51 words
The fault detection and isolation system of claim 12 wherein said means for calculating innovation sequences receives said signals representing pressure of steam entering said gas turbine and pressure of steam exiting said gas turbine and signals from said means for generating estimates representing said estimated inlet and outlet pressure states.
Claim 16
Dependent Claim
33 words
The fault detection and isolation system of claim 10 wherein said means for generating estimates generates estimates of an inlet flow state for said component and an outlet flow state for said component.
Claim 17
Dependent Claim
53 words
The detection and isolation system of claim 14 wherein said means for calculating innovation sequences receives said signals representing flow rate of steam entering said gas turbine and flow rate of steam exiting said gas turbine and signals from said means for generating estimates representing said estimated inlet and outlet flow rate states.
Claim 18
Dependent Claim
21 words
The fault detection and isolation system of claim 10 wherein said means for generating estimates is based on a Kalman filter.
Claim 19
Dependent Claim
27 words
The fault detection and isolation system of claim 10 wherein said means for comparing utilizes a multiple hypothesis statistical test to detect and isolate leaks and blockages.
Claim 20
Independent Claim
89 words
A method of detecting and isolating leaks and blockages in a fluid handling system having at least one component through which fluid flows, said comprising the steps of: measuring fluid conditions upstream of said component; measuring fluid conditions downstream of said component; using said upstream and downstream fluid conditions to generate estimates of an inlet state for said component and an outlet state for said component; calculating innovation sequences for said estimated inlet and outlet states; and comparing said innovation sequences to predetermined thresholds to detect leaks and blockages.
Claim 21
Independent Claim
89 words
A method of detecting and isolating leaks and blockages in a fluid handling system having at least one component through which fluid flows, said comprising the steps of: measuring fluid conditions upstream of said component; measuring fluid conditions downstream of said component; using said upstream and downstream fluid conditions to generate estimates of an inlet state for said component and an outlet state for said component; calculating innovation sequences for said estimated inlet and outlet states; and comparing said innovation sequences to predetermined thresholds to detect leaks and blockages.
Claim 22
Dependent Claim
51 words
The method of claim 18 wherein said step of measuring fluid conditions upstream of said component comprises measuring fluid pressure, temperature and flow rate upstream of said component and said step of measuring fluid conditions downstream of said component comprises measuring fluid pressure, temperature and flow rate downstream of said component.
Claim 23
Dependent Claim
38 words
The method of claim 19 wherein said step of using said upstream and downstream fluid conditions to generate estimates comprises generating estimates of an inlet pressure state for said component and an outlet pressure state for said component.
Claim 24
Dependent Claim
26 words
The method of claim 20 wherein said innovation sequences are calculated using said upstream and downstream fluid pressures and said estimated inlet and outlet pressure states.
Claim 25
Dependent Claim
38 words
The method of claim 19 wherein said step of using said upstream and downstream fluid conditions to generate estimates comprises generating estimates of an inlet flow state for said component and an outlet flow state for said component.
Claim 26
Dependent Claim
27 words
The method of claim 22 wherein said innovation sequences are calculated using said upstream and downstream flow rates and said estimated inlet and outlet flow rate states.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2006-02-24 | 2006-08-26 | 2007-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-02-24 | 2010-08-26 | 2011-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-02-24 | 2014-08-26 | 2015-02-25 | $7700.00 | Window Closed / Lapsed |