WO2001051904A3 - Pc multimedia-based leak detection system for water transmission and distribution pipes - Google Patents

Pc multimedia-based leak detection system for water transmission and distribution pipes Download PDF

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Publication number
WO2001051904A3
WO2001051904A3 PCT/CA2001/000030 CA0100030W WO0151904A3 WO 2001051904 A3 WO2001051904 A3 WO 2001051904A3 CA 0100030 W CA0100030 W CA 0100030W WO 0151904 A3 WO0151904 A3 WO 0151904A3
Authority
WO
WIPO (PCT)
Prior art keywords
leak
signals
leak detection
detection system
distribution pipes
Prior art date
Application number
PCT/CA2001/000030
Other languages
French (fr)
Other versions
WO2001051904A2 (en
Inventor
Osama Hunaidi
Original Assignee
Ca Nat Research Council
Osama Hunaidi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ca Nat Research Council, Osama Hunaidi filed Critical Ca Nat Research Council
Priority to DE60114366T priority Critical patent/DE60114366T2/en
Priority to EP01901094A priority patent/EP1250578B1/en
Priority to AU2001226605A priority patent/AU2001226605A1/en
Priority to CA002397174A priority patent/CA2397174C/en
Priority to AT01901094T priority patent/ATE308036T1/en
Publication of WO2001051904A2 publication Critical patent/WO2001051904A2/en
Publication of WO2001051904A3 publication Critical patent/WO2001051904A3/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/24—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
    • G01M3/243—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations for pipes

Abstract

This invention pertains to the detection of leaks in plastic water distribution pipes by processing the sound or vibration induced in the pipe by water escaping under pressure. Acoustic leak signals are measured at two (or more) contact points with the pipe, e.g., fire hydrants or valves, using vibration sensors or hydrophones. The signals are digitally recorded using the computer's soundcard. The leak is located using the difference in arrival times of two leak signals as determined from the cross-correlation function traditionally used in leak detection applications or an enhanced impulse response function. The enhanced impulse response function eliminates the need to filter leak signals before processing and hence avoids the uncertainty involved in selecting filter cutoff frequencies for non-experts. Listening to leak sound in plastic pipes is made possible in software by shifting their low-frequency content to an audible higher range. The software implementation of this system can be readily integrated with commercially available RF-based data transmitters and leak sensors - thus providing a complete, fexible, and inexpensive leak detection system.
PCT/CA2001/000030 2000-01-14 2001-01-12 Pc multimedia-based leak detection system for water transmission and distribution pipes WO2001051904A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE60114366T DE60114366T2 (en) 2000-01-14 2001-01-12 PC MULTIMEDIA LEAK DETECTION METHOD FOR WATER TRANSMISSION AND WATER DISTRIBUTION TUBES
EP01901094A EP1250578B1 (en) 2000-01-14 2001-01-12 Pc multimedia-based leak detection method for water transmission and distribution pipes
AU2001226605A AU2001226605A1 (en) 2000-01-14 2001-01-12 Pc multimedia-based leak detection system for water transmission and distribution pipes
CA002397174A CA2397174C (en) 2000-01-14 2001-01-12 Pc multimedia-based leak detection system for water transmission and distribution pipes
AT01901094T ATE308036T1 (en) 2000-01-14 2001-01-12 PC-MULTIMEDIA LEAK DETECTION METHOD FOR WATER TRANSMISSION AND WATER DISTRIBUTION TUBES

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/482,317 2000-01-14
US09/482,317 US6453247B1 (en) 2000-01-14 2000-01-14 PC multimedia-based leak detection system for water transmission and distribution pipes

Publications (2)

Publication Number Publication Date
WO2001051904A2 WO2001051904A2 (en) 2001-07-19
WO2001051904A3 true WO2001051904A3 (en) 2001-11-29

Family

ID=23915590

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2001/000030 WO2001051904A2 (en) 2000-01-14 2001-01-12 Pc multimedia-based leak detection system for water transmission and distribution pipes

Country Status (7)

Country Link
US (1) US6453247B1 (en)
EP (1) EP1250578B1 (en)
AT (1) ATE308036T1 (en)
AU (1) AU2001226605A1 (en)
CA (1) CA2397174C (en)
DE (1) DE60114366T2 (en)
WO (1) WO2001051904A2 (en)

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Cited By (4)

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US11590376B2 (en) 2010-06-16 2023-02-28 Mueller International, Llc Infrastructure monitoring devices, systems, and methods
US9291520B2 (en) 2011-08-12 2016-03-22 Mueller International, Llc Fire hydrant leak detector
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US9528903B2 (en) 2014-10-01 2016-12-27 Mueller International, Llc Piezoelectric vibration sensor for fluid leak detection

Also Published As

Publication number Publication date
EP1250578B1 (en) 2005-10-26
CA2397174C (en) 2008-08-12
DE60114366T2 (en) 2006-07-27
ATE308036T1 (en) 2005-11-15
US6453247B1 (en) 2002-09-17
AU2001226605A1 (en) 2001-07-24
DE60114366D1 (en) 2005-12-01
WO2001051904A2 (en) 2001-07-19
CA2397174A1 (en) 2001-07-19
EP1250578A2 (en) 2002-10-23

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