JPH0126015B2 - - Google Patents

Info

Publication number
JPH0126015B2
JPH0126015B2 JP55123647A JP12364780A JPH0126015B2 JP H0126015 B2 JPH0126015 B2 JP H0126015B2 JP 55123647 A JP55123647 A JP 55123647A JP 12364780 A JP12364780 A JP 12364780A JP H0126015 B2 JPH0126015 B2 JP H0126015B2
Authority
JP
Japan
Prior art keywords
gas
optical fiber
coating layer
resin coating
temperature
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.)
Expired
Application number
JP55123647A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5746138A (en
Inventor
Takeshi Akamatsu
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
Original Assignee
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP12364780A priority Critical patent/JPS5746138A/ja
Publication of JPS5746138A publication Critical patent/JPS5746138A/ja
Publication of JPH0126015B2 publication Critical patent/JPH0126015B2/ja
Granted 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
    • G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
    • G01M3/045—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means
    • G01M3/047—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means with photo-electrical detection means, e.g. using optical fibres

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Examining Or Testing Airtightness (AREA)
JP12364780A 1980-09-05 1980-09-05 Low-temperature gas sensor Granted JPS5746138A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12364780A JPS5746138A (en) 1980-09-05 1980-09-05 Low-temperature gas sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12364780A JPS5746138A (en) 1980-09-05 1980-09-05 Low-temperature gas sensor

Publications (2)

Publication Number Publication Date
JPS5746138A JPS5746138A (en) 1982-03-16
JPH0126015B2 true JPH0126015B2 (cg-RX-API-DMAC7.html) 1989-05-22

Family

ID=14865766

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12364780A Granted JPS5746138A (en) 1980-09-05 1980-09-05 Low-temperature gas sensor

Country Status (1)

Country Link
JP (1) JPS5746138A (cg-RX-API-DMAC7.html)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2089223C (en) * 1992-02-13 1999-06-01 Kazuo Amano Temperature abnormality detecting structure for fluid pipe
JP2018036222A (ja) * 2016-09-02 2018-03-08 東京電力ホールディングス株式会社 漏洩検知システム、漏洩検知方法及び超電導ケーブル

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56157833A (en) * 1980-05-08 1981-12-05 Ishikawajima Harima Heavy Ind Co Ltd Detecting method of leakage of low-temperature fluid

Also Published As

Publication number Publication date
JPS5746138A (en) 1982-03-16

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