JPS6425026A - Detecting apparatus of leakage of water - Google Patents

Detecting apparatus of leakage of water

Info

Publication number
JPS6425026A
JPS6425026A JP62180940A JP18094087A JPS6425026A JP S6425026 A JPS6425026 A JP S6425026A JP 62180940 A JP62180940 A JP 62180940A JP 18094087 A JP18094087 A JP 18094087A JP S6425026 A JPS6425026 A JP S6425026A
Authority
JP
Japan
Prior art keywords
leakage
water
signal
integration value
level
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP62180940A
Other languages
Japanese (ja)
Other versions
JPH0772705B2 (en
Inventor
Tadashi Saito
Shozo Taniguchi
Teruyoshi Matsuzawa
Takeji Kubota
Original Assignee
Toshiba Corp
Tokyo Metropolitan Gov
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 Toshiba Corp, Tokyo Metropolitan Gov filed Critical Toshiba Corp
Priority to JP62180940A priority Critical patent/JPH0772705B2/en
Priority claimed from DE8888111705T external-priority patent/DE3871006D1/en
Publication of JPS6425026A publication Critical patent/JPS6425026A/en
Publication of JPH0772705B2 publication Critical patent/JPH0772705B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To enable the estimation of a distance to a position of leakage of water separately from the scale of the leakage, by determining the means frequency of vibrations at a point of measurement and by making it possible to estimate the distance to a signal source therefrom. CONSTITUTION:A sound of leakage of water and noise, or vibrations due to the leakage of water and the noise, which are detected by a sensor 1, are converted into electric signals and inputted to a wave-shaping means 2. In the means 2, the amplification of the electric signals from the sensor 1 and the discrimination thereof based on crest values are conducted, and a signal having a significance as a water leakage signal is wave-shaped to be at a high level and a signal not having this significance to be at a low level, for instance. A signal continuation time integrating means 3 integrates a time wherein an input signal is at the high level, and outputs a time integration value T. A water leakage determining means 5 stores the time integration value in the state wherein no leakage of water is present, and outputs a signal of determination that the leakage of water is present, only when the time integration value T is larger than the determination reference values set respectively. A mean frequency detecting means 4 determines the mean value of signal frequencies for the whole period during which the means 3 operates.
JP62180940A 1987-07-22 1987-07-22 Leakage and leak position detector Expired - Lifetime JPH0772705B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62180940A JPH0772705B2 (en) 1987-07-22 1987-07-22 Leakage and leak position detector

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP62180940A JPH0772705B2 (en) 1987-07-22 1987-07-22 Leakage and leak position detector
DE8888111705T DE3871006D1 (en) 1987-07-22 1988-07-20 APPARATUS FOR DETECTING THE PRESENCE OR PRESENCE OF WATER LEAK ON WATER PIPELINES.
EP88111705A EP0300460B1 (en) 1987-07-22 1988-07-20 Apparatus for detecting presence/absence of water leakage from water pipe
KR8809193A KR920002018B1 (en) 1987-07-22 1988-07-22 Water-leakage detecting apparatus and method which are little influenced by noise

Publications (2)

Publication Number Publication Date
JPS6425026A true JPS6425026A (en) 1989-01-27
JPH0772705B2 JPH0772705B2 (en) 1995-08-02

Family

ID=16091937

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62180940A Expired - Lifetime JPH0772705B2 (en) 1987-07-22 1987-07-22 Leakage and leak position detector

Country Status (1)

Country Link
JP (1) JPH0772705B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5438000A (en) * 1992-11-12 1995-08-01 Nippon Paint Co., Ltd. Serum separation sealant
US6404343B1 (en) 1999-06-25 2002-06-11 Act Lsi Inc. Water leakage monitoring apparatus
GB2406654A (en) * 2003-08-26 2005-04-06 Metrika Ltd Method and apparatus for determining the sizes of leaks in water distribution networks
JP2013137370A (en) * 2011-12-28 2013-07-11 Jfe Steel Corp Method for reducing low frequency sound generated from machines
CN109738138A (en) * 2019-01-31 2019-05-10 河北工程大学 A kind of method and system using traveling wave positioning HDPE film leak location

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60209117A (en) * 1984-03-31 1985-10-21 Toshiba Corp Water meter with leak water detector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60209117A (en) * 1984-03-31 1985-10-21 Toshiba Corp Water meter with leak water detector

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5438000A (en) * 1992-11-12 1995-08-01 Nippon Paint Co., Ltd. Serum separation sealant
US6404343B1 (en) 1999-06-25 2002-06-11 Act Lsi Inc. Water leakage monitoring apparatus
GB2406654A (en) * 2003-08-26 2005-04-06 Metrika Ltd Method and apparatus for determining the sizes of leaks in water distribution networks
GB2406654B (en) * 2003-08-26 2005-09-28 Metrika Ltd Determining the sizes of leaks in water distribution networks
JP2013137370A (en) * 2011-12-28 2013-07-11 Jfe Steel Corp Method for reducing low frequency sound generated from machines
CN109738138A (en) * 2019-01-31 2019-05-10 河北工程大学 A kind of method and system using traveling wave positioning HDPE film leak location

Also Published As

Publication number Publication date
JPH0772705B2 (en) 1995-08-02

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term