JPS5697841A - Temperature fluctuation detection system - Google Patents
Temperature fluctuation detection systemInfo
- Publication number
- JPS5697841A JPS5697841A JP37980A JP37980A JPS5697841A JP S5697841 A JPS5697841 A JP S5697841A JP 37980 A JP37980 A JP 37980A JP 37980 A JP37980 A JP 37980A JP S5697841 A JPS5697841 A JP S5697841A
- Authority
- JP
- Japan
- Prior art keywords
- photodetector
- optical fiber
- terminal
- detection part
- light
- 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)
Abstract
PURPOSE: To improve the sensitivity and reliability, by knowing a change in light signal transmission state accompanying fluctuations of temperature by arranging optical fiber with a liquid core where fluctuations of temperature are to be detected.
CONSTITUTION: Over the external circumferential surface of container 4, such as a storage tank, containing desired liquid gas L, insulating material 5 is provided and the external circumferential surface is detection part 6. Over this detection part 6, optical fiber 1 consisting of internal liquid core 2 (e.g., C2Cl4 of -19°C in freezing point) and external cladding material 3 is spread. Said optical fiber 1 is provided with light source 7 and photodetector 8 at incidence terminal 10 and photodetector 9 at projection terminal 11. For monitoring, a prescribed light signal is transmitted from light source 7 to projection terminal 11 of optical fiber 1 via incidence terminal 10, and then if no fault occurs at the detection part, the light signal can be received at projection terminal 11 with a prescribed photodetection level. If it leaks, liquid core 2 is frozen to cause a light scattering phenomenon, and while the photodetection level of photodetector 9 drops, photodetector 8 also detects light.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37980A JPS5697841A (en) | 1980-01-07 | 1980-01-07 | Temperature fluctuation detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37980A JPS5697841A (en) | 1980-01-07 | 1980-01-07 | Temperature fluctuation detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5697841A true JPS5697841A (en) | 1981-08-06 |
Family
ID=11472155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP37980A Pending JPS5697841A (en) | 1980-01-07 | 1980-01-07 | Temperature fluctuation detection system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5697841A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19509129A1 (en) * | 1995-02-24 | 1996-08-29 | Geso Ges Fuer Sensorik Geotech | Method and device for checking and monitoring the condition of pipes, containers, pipelines or the like |
| CN106404353A (en) * | 2016-08-31 | 2017-02-15 | 长飞光纤光缆股份有限公司 | Optical fiber testing system |
-
1980
- 1980-01-07 JP JP37980A patent/JPS5697841A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19509129A1 (en) * | 1995-02-24 | 1996-08-29 | Geso Ges Fuer Sensorik Geotech | Method and device for checking and monitoring the condition of pipes, containers, pipelines or the like |
| DE19509129C2 (en) * | 1995-02-24 | 1998-07-02 | Geso Ges Fuer Sensorik Geotech | Method and device for checking and monitoring the condition of pipes, containers, pipelines or the like |
| CN106404353A (en) * | 2016-08-31 | 2017-02-15 | 长飞光纤光缆股份有限公司 | Optical fiber testing system |
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