NO921270L - Optisk fiberkanal for detektering av temperaturendring - Google Patents

Optisk fiberkanal for detektering av temperaturendring

Info

Publication number
NO921270L
NO921270L NO92921270A NO921270A NO921270L NO 921270 L NO921270 L NO 921270L NO 92921270 A NO92921270 A NO 92921270A NO 921270 A NO921270 A NO 921270A NO 921270 L NO921270 L NO 921270L
Authority
NO
Norway
Prior art keywords
fibre
light
cover
coefficient
heat expansion
Prior art date
Application number
NO92921270A
Other languages
English (en)
Other versions
NO921270D0 (no
Inventor
Bengt Johan Anders Carlstroem
Gunnar Stefan Forsberg
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of NO921270D0 publication Critical patent/NO921270D0/no
Publication of NO921270L publication Critical patent/NO921270L/no

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K5/00—Measuring temperature based on the expansion or contraction of a material
    • G01K5/48—Measuring temperature based on the expansion or contraction of a material the material being a solid
    • G01K5/50—Measuring temperature based on the expansion or contraction of a material the material being a solid arranged for free expansion or contraction
    • G01K5/52—Measuring temperature based on the expansion or contraction of a material the material being a solid arranged for free expansion or contraction with electrical conversion means for final indication
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

En optisk fiberkabel har en optisk fiber med en kjerne og en mantel omgitt av en kappe av polymert ; materiale. I et temperaturdetekteringsområde (T1- ] T2) har det polymere materialet en negativ varmeutvidelseskoeffisient (otO), hvis absolutte verdi er større enn varmeutvidelseskoeffisienten (a) i omgivende temperaturområder (TO-T1, T2-T3). Utsatt for stigende temperatur (T), vil kappen kontrahere og forårsake mikrobøyning av den optiske fiber. Lys som går gjennom fibren blir dempet og reflektert, og det reflekterte lys vil bli dempet ytterligere i et oppvarmet område av. fibren. Størrelsen på området og posisjonen langs fibren kan bli fastlagt ved å måle lysets gangtid. Den polymere kappen har en varmeutvidelseskoeffisient slik at det muliggjøres detektering av flere oppvarmede områder. Fiberen demper lyset i et område på 0.01-0.1 dB/m når fibren er i oppvarmet tilstand.
NO92921270A 1989-10-02 1992-04-01 Optisk fiberkanal for detektering av temperaturendring NO921270L (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8903229A SE468229B (sv) 1989-10-02 1989-10-02 Optisk fiberkabel foer detektering av en temperaturfoeraendring
PCT/SE1990/000632 WO1991005230A1 (en) 1989-10-02 1990-10-02 Optical fibre cable for detecting a change in temperature

Publications (2)

Publication Number Publication Date
NO921270D0 NO921270D0 (no) 1992-04-01
NO921270L true NO921270L (no) 1992-05-19

Family

ID=20377026

Family Applications (1)

Application Number Title Priority Date Filing Date
NO92921270A NO921270L (no) 1989-10-02 1992-04-01 Optisk fiberkanal for detektering av temperaturendring

Country Status (11)

Country Link
US (1) US5251274A (no)
EP (2) EP0421967A1 (no)
JP (1) JP3061407B2 (no)
AT (1) ATE131607T1 (no)
AU (1) AU6522990A (no)
DE (1) DE69024224T2 (no)
DK (1) DK0494930T3 (no)
ES (1) ES2080839T3 (no)
NO (1) NO921270L (no)
SE (1) SE468229B (no)
WO (1) WO1991005230A1 (no)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0553675A1 (de) * 1992-01-29 1993-08-04 Siemens Aktiengesellschaft Verfahren und Vorrichtung zur Überwachung der Temperatur in einem Turbinenbauteil
US5419636A (en) * 1993-08-12 1995-05-30 Sandia Corporation Microbend fiber-optic temperature sensor
SE502778C2 (sv) * 1993-10-14 1996-01-08 Ericsson Telefon Ab L M Optisk fiber för användning som givare jämte förfarande för framställning av en optisk fiber för användning som givare
CA2178076A1 (en) * 1994-10-03 1996-04-11 Arnold Harold Hartog Monitoring wall temperatures of reactor vessels
US6205280B1 (en) * 1998-08-25 2001-03-20 Molecular Optoelectronics Corporation Blockless fiber optic attenuators and attenuation systems employing dispersion controlled polymers
US6144780A (en) * 1998-10-05 2000-11-07 Lucent Technologies Inc. Polymer waveguide switch and method
DE19935439A1 (de) * 1999-07-28 2001-02-15 Siemens Ag Sensorleitung
DE10111640A1 (de) 2001-03-10 2002-10-02 Airbus Gmbh Verfahren zur Ermittlung und Meldung von Überhitzungen und Feuern in einem Flugzeug
US7077566B2 (en) * 2003-12-11 2006-07-18 General Electric Company Methods and apparatus for temperature measurement and control in electromagnetic coils
US20090067776A1 (en) * 2007-09-11 2009-03-12 Schlumberger Technology Corporation Optical fibers
JP5353262B2 (ja) * 2008-04-02 2013-11-27 富士通株式会社 温度計測方法、温度制御システム、風量測定装置及び発熱量測定装置
US8303176B2 (en) * 2010-05-11 2012-11-06 Vladimir Kochergin Cryogenic fiber optic temperature sensor and method of manufacturing the same
GB2518190B (en) * 2013-09-12 2018-06-06 Buddi Ltd Tag including a thermo-chromic optical fibre
US9964698B1 (en) * 2016-10-28 2018-05-08 The Boeing Company Multicore optical fiber cable strain enhancement
DE102018117979A1 (de) * 2018-07-25 2020-01-30 Brugg Rohr Ag Holding Doppelwandiges Leitungsrohr sowie ein Lichtwellenleiter für ein solches Leitungsrohr

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4417782A (en) * 1980-03-31 1983-11-29 Raychem Corporation Fiber optic temperature sensing
JPS57111424A (en) * 1980-12-29 1982-07-10 Fujitsu Ltd Optical temperature detector
US4463254A (en) * 1981-08-27 1984-07-31 Trw Inc. Microbending of optical fibers for remote force measurement
JPS5950676A (ja) * 1982-09-17 1984-03-23 Hitachi Ltd 可変速再生用ビデオテ−プレコ−ダ
GB8311256D0 (en) * 1983-04-26 1983-06-02 Central Electr Generat Board Measuring external parameter
JPS59203929A (ja) * 1983-05-06 1984-11-19 Sumitomo Electric Ind Ltd 光ファイバ用感温収縮部材
US4729627A (en) * 1983-08-15 1988-03-08 Sumitomo Electric Industries, Ltd. Optical fiber cable for detecting low temperature
SE443656B (sv) * 1984-07-20 1986-03-03 Ericsson Telefon Ab L M Mikrobojkenslig optisk fiberkabel
GB2170593B (en) * 1985-02-01 1988-09-14 Central Electr Generat Board Temperature measurement
JPS6269131A (ja) * 1985-09-24 1987-03-30 Fujikura Ltd 光フアイバ温度センサ
JPS6269132A (ja) * 1985-09-24 1987-03-30 Fujikura Ltd 光フアイバ温度センサ

Also Published As

Publication number Publication date
SE8903229L (sv) 1991-04-03
DK0494930T3 (da) 1996-01-22
ES2080839T3 (es) 1996-02-16
JPH03132604A (ja) 1991-06-06
SE468229B (sv) 1992-11-23
US5251274A (en) 1993-10-05
EP0421967A1 (en) 1991-04-10
WO1991005230A1 (en) 1991-04-18
DE69024224D1 (de) 1996-01-25
EP0494930A1 (en) 1992-07-22
JP3061407B2 (ja) 2000-07-10
AU6522990A (en) 1991-04-28
EP0494930B1 (en) 1995-12-13
DE69024224T2 (de) 1996-05-02
NO921270D0 (no) 1992-04-01
ATE131607T1 (de) 1995-12-15
SE8903229D0 (sv) 1989-10-02

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