JPS576330A - Detecting system for underground water leakage - Google Patents

Detecting system for underground water leakage

Info

Publication number
JPS576330A
JPS576330A JP7997280A JP7997280A JPS576330A JP S576330 A JPS576330 A JP S576330A JP 7997280 A JP7997280 A JP 7997280A JP 7997280 A JP7997280 A JP 7997280A JP S576330 A JPS576330 A JP S576330A
Authority
JP
Japan
Prior art keywords
water
ultrasonic wave
leaked
distorted
sound
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.)
Pending
Application number
JP7997280A
Other languages
Japanese (ja)
Inventor
Susumu Yagyu
Yoshio Endo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP7997280A priority Critical patent/JPS576330A/en
Publication of JPS576330A publication Critical patent/JPS576330A/en
Pending legal-status Critical Current

Links

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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

PURPOSE:To detect sound of water leakage, without being interferred with underground noise, by giving an ultrasonic wave to flowing water and detecting a distorted ultrasonic wave produced with the disturbance of the leaked water. CONSTITUTION:With accessories 3 such as hydrants and switching valves which are implanted in linking with an upward linking 4 of an underground water supply pipe 1 and exposed on ground, an ultrasonic wave oscillator 5 is fixed to emit ultrasonic waves to the accessories 3. Ultrasonic waves propagate a water supply pipe 1 as well as flowing water. A low frequency modulator 7 interrupts the output of an ultrasonic wave oscillator 5 and modulates puls pulsatively with a desired period. The ultrasonic waves propagate in flowing water and the waveform is disturbed with the turbulence of flow caused at a leaked part 13 and distorted ultrasonic waves are produced at water leaked part. This distorted ultrasonic wave is received at an ultrasonic wave receiver 10 of a leaked water sound detector 9, and the audible low frequency component included in the distorted wave is introduced to a receiver 12 to listen to the leaked water sound as audible sound.
JP7997280A 1980-06-13 1980-06-13 Detecting system for underground water leakage Pending JPS576330A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7997280A JPS576330A (en) 1980-06-13 1980-06-13 Detecting system for underground water leakage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7997280A JPS576330A (en) 1980-06-13 1980-06-13 Detecting system for underground water leakage

Publications (1)

Publication Number Publication Date
JPS576330A true JPS576330A (en) 1982-01-13

Family

ID=13705231

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7997280A Pending JPS576330A (en) 1980-06-13 1980-06-13 Detecting system for underground water leakage

Country Status (1)

Country Link
JP (1) JPS576330A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08271370A (en) * 1995-03-29 1996-10-18 Osaka Gas Co Ltd Method and device for inspecting conduit
JP2000154888A (en) * 1998-11-19 2000-06-06 Osaka Gas Co Ltd Probing method for piping structure and piping probing device
JP2009236691A (en) * 2008-03-27 2009-10-15 Tokyo Gas Co Ltd System and method for searching buried pipe
CN102537667A (en) * 2011-12-29 2012-07-04 杭州翰平电子技术有限公司 Underground water pipe leakage detection positioning system and method thereof
CN109594613A (en) * 2017-11-20 2019-04-09 山东昌乐实康水业有限公司 Tap water supply device and leak detection method with leak self-checking function

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5043988A (en) * 1973-08-22 1975-04-21

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5043988A (en) * 1973-08-22 1975-04-21

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08271370A (en) * 1995-03-29 1996-10-18 Osaka Gas Co Ltd Method and device for inspecting conduit
JP2000154888A (en) * 1998-11-19 2000-06-06 Osaka Gas Co Ltd Probing method for piping structure and piping probing device
JP2009236691A (en) * 2008-03-27 2009-10-15 Tokyo Gas Co Ltd System and method for searching buried pipe
CN102537667A (en) * 2011-12-29 2012-07-04 杭州翰平电子技术有限公司 Underground water pipe leakage detection positioning system and method thereof
CN109594613A (en) * 2017-11-20 2019-04-09 山东昌乐实康水业有限公司 Tap water supply device and leak detection method with leak self-checking function
CN109594613B (en) * 2017-11-20 2023-10-10 山东昌乐实康水业有限公司 Tap water supply device with water leakage self-checking function and leakage detection method

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