JPS56147034A - Gas leakage detector - Google Patents

Gas leakage detector

Info

Publication number
JPS56147034A
JPS56147034A JP5150280A JP5150280A JPS56147034A JP S56147034 A JPS56147034 A JP S56147034A JP 5150280 A JP5150280 A JP 5150280A JP 5150280 A JP5150280 A JP 5150280A JP S56147034 A JPS56147034 A JP S56147034A
Authority
JP
Japan
Prior art keywords
infrared ray
detected
leakage
methane
optical paths
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
JP5150280A
Other languages
Japanese (ja)
Inventor
Nobuhiro Hotta
Tamataro Haitani
Kouji Shinohara
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.)
Fujitsu Ltd
Tokyo Electric Power Company Holdings Inc
Original Assignee
Tokyo Electric Power Co Inc
Fujitsu 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 Tokyo Electric Power Co Inc, Fujitsu Ltd filed Critical Tokyo Electric Power Co Inc
Priority to JP5150280A priority Critical patent/JPS56147034A/en
Publication of JPS56147034A publication Critical patent/JPS56147034A/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
    • G01M3/38—Investigating fluid-tightness of structures by using light

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

PURPOSE:To permit early detection of the leakage of combustible gases over a wide range by installing infrared ray measuring optical paths in an observation area, detecting the changes in infrared ray laser light absorption by gas leakage and making differential processing and the like. CONSTITUTION:Infrared ray measuring optical paths 4... consisting of detecting units 2 and reflection mirros 3... are provided in an outdoor observation area where LNG storage tanks 1..., etc. are installed. The laser beam of the vibration band wavelength of prescribed mode of leaking methane or the like from the semiconductor laser elements 21 of these units 2 reciprocates in the optical paths 4 and is detected with an infrared ray detector 22, then the changes in the laser beam absorption in accordance with the concentrations of the leaking methane based on spectral analyses are detected by way of lock-in amplifiers 29, 30, and a divider 31. The detected values are differentially processed in a differential circuit 35, and an alarm device 36 operate in real time in response to the methane leakage. Hence, the leakage of combustible gases such as methane are detected in an early time over a wide range with the relatively simple constitution.
JP5150280A 1980-04-17 1980-04-17 Gas leakage detector Pending JPS56147034A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5150280A JPS56147034A (en) 1980-04-17 1980-04-17 Gas leakage detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5150280A JPS56147034A (en) 1980-04-17 1980-04-17 Gas leakage detector

Publications (1)

Publication Number Publication Date
JPS56147034A true JPS56147034A (en) 1981-11-14

Family

ID=12888754

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5150280A Pending JPS56147034A (en) 1980-04-17 1980-04-17 Gas leakage detector

Country Status (1)

Country Link
JP (1) JPS56147034A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6232333A (en) * 1985-08-05 1987-02-12 Tokyo Gas Co Ltd Gas leak detecting device
JPS63214637A (en) * 1987-03-02 1988-09-07 Agency Of Ind Science & Technol Gas leak detecting device
JPS63290947A (en) * 1987-05-25 1988-11-28 Natl Res Inst For Metals Instrument for measuring air pollution
JP2004219379A (en) * 2003-01-17 2004-08-05 Mitsubishi Heavy Ind Ltd System for monitoring gas concentration
KR101045322B1 (en) 2011-03-08 2011-06-29 (주)광산 Oil mist detector having transparent window contamination detection part and transparent window contamination detection method of oil mist detector
JP2011128151A (en) * 2009-12-17 2011-06-30 General Electric Co <Ge> Gas mixture measurement system and method therefor
US8548271B2 (en) 2008-01-08 2013-10-01 Opgal Optronic Industries Ltd. System and method for gas leakage detection
JP2014119322A (en) * 2012-12-14 2014-06-30 Mitsubishi Heavy Ind Ltd Gas leakage detection system
CN104458144A (en) * 2014-12-05 2015-03-25 大连工业大学 Laser leakage detecting system and method for positioning leakage gas of laser leakage detecting system
JP2017072463A (en) * 2015-10-07 2017-04-13 株式会社トプコン Spectroscopic measurement device
JP2018521330A (en) * 2015-06-11 2018-08-02 ネオ モニターズ アクティーゼルスカブＮｅｏ Ｍｏｎｉｔｏｒｓ Ａｓ Gas monitoring device
JP2019135471A (en) * 2018-02-05 2019-08-15 東京瓦斯株式会社 Gas detection system and gas detection method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5461587A (en) * 1977-10-25 1979-05-17 Fujitsu Ltd Gas analyzer using ultrared ray
JPS5487588A (en) * 1977-12-24 1979-07-12 Fujitsu Ltd Infrared spectral analytical apparatus
JPS5492789A (en) * 1977-12-29 1979-07-23 Fujitsu Ltd Gas analytical method by infrared ray

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5461587A (en) * 1977-10-25 1979-05-17 Fujitsu Ltd Gas analyzer using ultrared ray
JPS5487588A (en) * 1977-12-24 1979-07-12 Fujitsu Ltd Infrared spectral analytical apparatus
JPS5492789A (en) * 1977-12-29 1979-07-23 Fujitsu Ltd Gas analytical method by infrared ray

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6232333A (en) * 1985-08-05 1987-02-12 Tokyo Gas Co Ltd Gas leak detecting device
JPS63214637A (en) * 1987-03-02 1988-09-07 Agency Of Ind Science & Technol Gas leak detecting device
JPS63290947A (en) * 1987-05-25 1988-11-28 Natl Res Inst For Metals Instrument for measuring air pollution
JPH0549177B2 (en) * 1987-05-25 1993-07-23 Kagaku Gijutsucho Kinzoku
JP2004219379A (en) * 2003-01-17 2004-08-05 Mitsubishi Heavy Ind Ltd System for monitoring gas concentration
US8548271B2 (en) 2008-01-08 2013-10-01 Opgal Optronic Industries Ltd. System and method for gas leakage detection
JP2011128151A (en) * 2009-12-17 2011-06-30 General Electric Co <Ge> Gas mixture measurement system and method therefor
KR101045322B1 (en) 2011-03-08 2011-06-29 (주)광산 Oil mist detector having transparent window contamination detection part and transparent window contamination detection method of oil mist detector
JP2014119322A (en) * 2012-12-14 2014-06-30 Mitsubishi Heavy Ind Ltd Gas leakage detection system
CN104458144A (en) * 2014-12-05 2015-03-25 大连工业大学 Laser leakage detecting system and method for positioning leakage gas of laser leakage detecting system
JP2018521330A (en) * 2015-06-11 2018-08-02 ネオ モニターズ アクティーゼルスカブＮｅｏ Ｍｏｎｉｔｏｒｓ Ａｓ Gas monitoring device
JP2017072463A (en) * 2015-10-07 2017-04-13 株式会社トプコン Spectroscopic measurement device
US10578485B2 (en) 2015-10-07 2020-03-03 Topcon Corporation Spectroscopic instrument
JP2019135471A (en) * 2018-02-05 2019-08-15 東京瓦斯株式会社 Gas detection system and gas detection method

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