JPS6461622A - Temperature measuring instrument - Google Patents
Temperature measuring instrumentInfo
- Publication number
- JPS6461622A JPS6461622A JP62218761A JP21876187A JPS6461622A JP S6461622 A JPS6461622 A JP S6461622A JP 62218761 A JP62218761 A JP 62218761A JP 21876187 A JP21876187 A JP 21876187A JP S6461622 A JPS6461622 A JP S6461622A
- Authority
- JP
- Japan
- Prior art keywords
- light
- dichroic mirror
- separating
- sensor part
- backward scattered
- 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
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Radiation Pyrometers (AREA)
Abstract
PURPOSE:To measure a wide-range temperature distribution with high accuracy, by separating and measuring Raman backward scattered light generated in an optical fiber by using a reflecting dichroic mirror and a separating dichroic mirror. CONSTITUTION:A separating dichroic mirror 3 and a separating dichroic mirror 4 are arranged between the light source 1 of the temperature measuring instrument and an optical fiber sensor part 2. Pulse light emitted by the laser 1a of a light source enters only the sensor part 2 and the majority of the light travels to the sensor part 2, but part of it returns to the incidence side by Raman effect. This light is split by the reflecting dichroic mirror 3 into the Raman backward scattered light and Rayleigh backward scattered light, the Raman backward scattered light is split by the separating dichroic mirror 4 into Stokes' light and anti-Stockes' light, which are made incident on detection systems 5 and 6, thereby accurately calculating the temperature of the sensor part 2 from their intensity ratio.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62218761A JPS6461622A (en) | 1987-09-01 | 1987-09-01 | Temperature measuring instrument |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62218761A JPS6461622A (en) | 1987-09-01 | 1987-09-01 | Temperature measuring instrument |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6461622A true JPS6461622A (en) | 1989-03-08 |
Family
ID=16724987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62218761A Pending JPS6461622A (en) | 1987-09-01 | 1987-09-01 | Temperature measuring instrument |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6461622A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02201131A (en) * | 1989-01-30 | 1990-08-09 | Tokyo Electric Power Co Inc:The | Optical fiber system distribution type temperature sensor |
JPH02240533A (en) * | 1989-03-14 | 1990-09-25 | Furuno Electric Co Ltd | Method for measuring underwater temperature |
JPH03211430A (en) * | 1990-01-16 | 1991-09-17 | Chubu Electric Power Co Inc | Temperature distribution measuring method |
JPH07167717A (en) * | 1989-01-30 | 1995-07-04 | Tokyo Electric Power Co Inc:The | Fiber optic temperature distribution sensor |
US5449233A (en) * | 1992-06-16 | 1995-09-12 | Kabushiki Kaisha Toshiba | Temperature distribution measuring apparatus using an optical fiber |
US5639162A (en) * | 1993-01-06 | 1997-06-17 | Kabushiki Kaisha Toshiba | Temperature distribution measuring apparatus using an optical fiber |
-
1987
- 1987-09-01 JP JP62218761A patent/JPS6461622A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02201131A (en) * | 1989-01-30 | 1990-08-09 | Tokyo Electric Power Co Inc:The | Optical fiber system distribution type temperature sensor |
JPH07167717A (en) * | 1989-01-30 | 1995-07-04 | Tokyo Electric Power Co Inc:The | Fiber optic temperature distribution sensor |
JPH02240533A (en) * | 1989-03-14 | 1990-09-25 | Furuno Electric Co Ltd | Method for measuring underwater temperature |
JPH03211430A (en) * | 1990-01-16 | 1991-09-17 | Chubu Electric Power Co Inc | Temperature distribution measuring method |
US5449233A (en) * | 1992-06-16 | 1995-09-12 | Kabushiki Kaisha Toshiba | Temperature distribution measuring apparatus using an optical fiber |
US5618108A (en) * | 1992-06-16 | 1997-04-08 | Kabushiki Kaisha Toshiba | Temperature distribution measuring apparatus using an optical fiber |
US5639162A (en) * | 1993-01-06 | 1997-06-17 | Kabushiki Kaisha Toshiba | Temperature distribution measuring apparatus using an optical fiber |
US5825804A (en) * | 1993-01-06 | 1998-10-20 | Kabushiki Kaisha Toshiba | Temperature distribution measuring apparatus using an optical fiber |
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