JPS6469925A - Optical fiber type temperature distribution measuring apparatus - Google Patents
Optical fiber type temperature distribution measuring apparatusInfo
- 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
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.
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)
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 |
-
1987
- 1987-09-11 JP JP22657587A patent/JPS6469925A/en active Pending
Cited By (7)
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 |
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