JPS6469925A - Optical fiber type temperature distribution measuring apparatus - Google Patents

Optical fiber type temperature distribution measuring apparatus

Info

Publication number
JPS6469925A
JPS6469925A JP22657587A JP22657587A JPS6469925A JP S6469925 A JPS6469925 A JP S6469925A JP 22657587 A JP22657587 A JP 22657587A JP 22657587 A JP22657587 A JP 22657587A JP S6469925 A JPS6469925 A JP S6469925A
Authority
JP
Japan
Prior art keywords
optical fiber
light
longitudinal direction
intensity
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.)
Pending
Application number
JP22657587A
Other languages
Japanese (ja)
Inventor
Hiroshi Kawakami
Teruaki Tsutsui
Satoru Yamamoto
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.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable 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 Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP22657587A priority Critical patent/JPS6469925A/en
Publication of JPS6469925A publication Critical patent/JPS6469925A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To measure the temperature distribution of optical fiber in the longitudinal direction continuously and accurately, by providing the optical fiber, in which fluorescent material is doped in the longitudinal direction, in a temperature measuring region. CONSTITUTION:Pulse light, which is emitted from a light source 4, is propagated in optical fiber 7. Rare earth material as a fluorescent material is doped in the optical fiber 7 in the longitudinal direction. Fluorescent light representing intensity distribution corresponding to temperature distribution of the optical fiber 7 in the longitudinal direction is excited with the pulse light. The flourescent light and part of Rayleigh scattering light, which are generated in the optical fiber 7, are detected with a detecting system 13. Then, the temperature of each position of the optical fiber 7 is obtained based on the intensity ration between the Rayleigh scattering light and the fluorescent light, which are detected with the detecting system 13, in a signal processing circuit 22. In the computation of the temperature, the Rayleigh scattering light is utilized as reference light. The effect of the fluctuation of the intensity of the light source and the effect of the fluctuation of the intensity of backward scattering light due external force, which is applied on the optical fiber are moved.
JP22657587A 1987-09-11 1987-09-11 Optical fiber type temperature distribution measuring apparatus Pending JPS6469925A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22657587A JPS6469925A (en) 1987-09-11 1987-09-11 Optical fiber type temperature distribution measuring apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22657587A JPS6469925A (en) 1987-09-11 1987-09-11 Optical fiber type temperature distribution measuring apparatus

Publications (1)

Publication Number Publication Date
JPS6469925A true JPS6469925A (en) 1989-03-15

Family

ID=16847315

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22657587A Pending JPS6469925A (en) 1987-09-11 1987-09-11 Optical fiber type temperature distribution measuring apparatus

Country Status (1)

Country Link
JP (1) JPS6469925A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03273123A (en) * 1990-03-23 1991-12-04 Yutaka Ono Spatial temperature measurement system
US5217306A (en) * 1991-03-02 1993-06-08 Fujikura Ltd. Temperature distribution analyzer using optical fiber
EP0597932A1 (en) * 1991-07-17 1994-05-25 Georgia Tech Res Inst Measuring molecular change in the ocular lens.
US5470155A (en) * 1993-06-11 1995-11-28 Luxtron Corporation Apparatus and method for measuring temperatures at a plurality of locations using luminescent-type temperature sensors which are excited in a time sequence
US5765948A (en) * 1995-03-07 1998-06-16 Kabushiki Kaisha Toshiba Light-temperature distribution sensor using back scattering light produced by incident light pulse and temperature distribution measuring method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03273123A (en) * 1990-03-23 1991-12-04 Yutaka Ono Spatial temperature measurement system
US5217306A (en) * 1991-03-02 1993-06-08 Fujikura Ltd. Temperature distribution analyzer using optical fiber
EP0597932A1 (en) * 1991-07-17 1994-05-25 Georgia Tech Res Inst Measuring molecular change in the ocular lens.
EP0597932A4 (en) * 1991-07-17 1994-12-07 Georgia Tech Res Inst Measuring molecular change in the ocular lens.
US5470155A (en) * 1993-06-11 1995-11-28 Luxtron Corporation Apparatus and method for measuring temperatures at a plurality of locations using luminescent-type temperature sensors which are excited in a time sequence
US5600147A (en) * 1993-06-11 1997-02-04 Luxtron Corporation Temperature measuring system having improved signal processing and multiple optical sensors
US5765948A (en) * 1995-03-07 1998-06-16 Kabushiki Kaisha Toshiba Light-temperature distribution sensor using back scattering light produced by incident light pulse and temperature distribution measuring method

Similar Documents

Publication Publication Date Title
GB2181830B (en) Temperature measurement
EP0214040A3 (en) Fiber-optic sensor and method of use
SE8301629D0 (en) FIBEROPTICAL LUMINISCENSITY METHOD FOR SEATING THE LIGHT TRANSMISSION IN AN OPTICAL SENSOR
NO850417L (en) DEVICE FOR COLOR DIFFERENCES
GB2170593B (en) Temperature measurement
ES434970A1 (en) Process and device for measuring antigen-antibody reactions
SE8202093L (en) FIBEROPTICAL LUMINISCENSITY METHOD FOR PHYSICAL SIZES WITH TIME OR FREQUENCY DIVIDED SIGNAL INFORMATION
FR2450455B1 (en)
DE3679686D1 (en) TIME FIELD INTENSITY NORMALIZATION FOR LIGHT FIBER DETECTOR.
JPS6469925A (en) Optical fiber type temperature distribution measuring apparatus
JPS5478156A (en) Detector of break point of optical fibers
JPS6461622A (en) Temperature measuring instrument
JPS5437485A (en) Output stabilizing method for semiconductor laser
JPS5251957A (en) Measuring light transmission loss of optical material
JPS549647A (en) Loss measuring method of optical fibers
JPS5398857A (en) Measurement method and apparatus of v value of optical fiber
EP0048688A3 (en) Method to detect optically and/or to measure a deformation and/or a displacement of an object or part of an object, device to carry out the method and use of the method
JPS6418073A (en) Detecting apparatus for voltage
JPS57116234A (en) Measuring method for photo loss
JPS5722528A (en) Measuring method for optical fiber transmission band
JPS6426103A (en) Optical type two-directional length measuring instrument
JPS57111405A (en) Distance measuring device
JPH02201203A (en) Fluorescent fiber sensor
JPS5320349A (en) Measuring method for wave length dispersion of photo-fiber
JPS5353348A (en) Optical fiber length measuring method and apparatus