JPS57201831A - Water leak detector - Google Patents

Water leak detector

Info

Publication number
JPS57201831A
JPS57201831A JP8690681A JP8690681A JPS57201831A JP S57201831 A JPS57201831 A JP S57201831A JP 8690681 A JP8690681 A JP 8690681A JP 8690681 A JP8690681 A JP 8690681A JP S57201831 A JPS57201831 A JP S57201831A
Authority
JP
Japan
Prior art keywords
water
leak
circuit
output
discriminating circuit
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
JP8690681A
Other languages
Japanese (ja)
Inventor
Tadashi Saito
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP8690681A priority Critical patent/JPS57201831A/en
Publication of JPS57201831A publication Critical patent/JPS57201831A/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
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
    • G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements

Landscapes

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

Abstract

PURPOSE:To find a leak of water quickly and easily, by installing a water leak detector such as a pressure-electric transducer having the water leak detecting function in a water pipe. CONSTITUTION:The watertight structure is given to a water leak detecting part including a pressure-electric transducer 5, and this detecting part is attached to a water pipe semipermanently. The output signal of the transducer 5 is applied to a band pass filter 23 through an amplifying circuit 22, and signal components other than an oscillation frequency due to a leak of wate are cut, and this output signal is inputted to a crest value discriminating circuit 24, and only a signal having a certain magnitude or more is distinguished and is applied together with the output of a clock pulse generating circuit 25 to a discriminating circuit 26. Only when the output of the crest value discriminating circuit 24 is generated continuously for a certain time, the discriminating circuit 26 discriminates a leak of water. The output of the discriminating circuit 26 is stored in a storage circuit 27 and is displayed on a display part 28.
JP8690681A 1981-06-08 1981-06-08 Water leak detector Pending JPS57201831A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8690681A JPS57201831A (en) 1981-06-08 1981-06-08 Water leak detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8690681A JPS57201831A (en) 1981-06-08 1981-06-08 Water leak detector

Publications (1)

Publication Number Publication Date
JPS57201831A true JPS57201831A (en) 1982-12-10

Family

ID=13899877

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8690681A Pending JPS57201831A (en) 1981-06-08 1981-06-08 Water leak detector

Country Status (1)

Country Link
JP (1) JPS57201831A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59150320A (en) * 1983-02-04 1984-08-28 Toshiba Corp Water leak detecting apparatus
JPS6228633A (en) * 1985-07-31 1987-02-06 Junkosha Co Ltd Remote leaking liquid detecting device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5238284A (en) * 1975-09-22 1977-03-24 Kishikawa Tokushu Valve Seisakusho:Kk Valve leak detection device
JPS5315877A (en) * 1976-07-28 1978-02-14 Toshiba Corp Leak tester

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5238284A (en) * 1975-09-22 1977-03-24 Kishikawa Tokushu Valve Seisakusho:Kk Valve leak detection device
JPS5315877A (en) * 1976-07-28 1978-02-14 Toshiba Corp Leak tester

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59150320A (en) * 1983-02-04 1984-08-28 Toshiba Corp Water leak detecting apparatus
JPS6228633A (en) * 1985-07-31 1987-02-06 Junkosha Co Ltd Remote leaking liquid detecting device

Similar Documents

Publication Publication Date Title
JPS5633587A (en) Electronic watch
JPS57201831A (en) Water leak detector
JPS5750021A (en) Periodic signal detector
JPS57201832A (en) Water leak detection
JPS5784375A (en) Failure detector for supersonic device
JPS5376797A (en) Receiver of fire alarm system
JPS576330A (en) Detecting system for underground water leakage
US5917413A (en) Water entry alarm system which protects against false triggering and method therefor
JPS54996A (en) Fire detector and fire alarm unit used for it
JPS5595860A (en) Ultrasonic flaw detector
JPS5453570A (en) Electronic watch with alarm
JPS5487902A (en) Cavitation supervisory system
JPS5517427A (en) Electronic watch with alarm function for cell life
JPS55114031A (en) Detector for pulse absence
JPS5312A (en) Am receiver
JPS53104276A (en) Electronic watch
JPS57161688A (en) Sound reporting device
JPS5717236A (en) Detector for synchronism
JPS5249541A (en) Alarm or indication system for vehicles
JPS55152625A (en) Detecting device for doze driving
JPS5444573A (en) Portable electronic watch
JPS5512455A (en) Ultrasonic level meter
JPS5427467A (en) Electronic watch with alarm function
JPS5739376A (en) Alarm electronic timepiece
JPS54103700A (en) Ultrasonic alert device