JPS5762004A - Optical fiber for detecting oil leakage - Google Patents
Optical fiber for detecting oil leakageInfo
- Publication number
- JPS5762004A JPS5762004A JP55072188A JP7218880A JPS5762004A JP S5762004 A JPS5762004 A JP S5762004A JP 55072188 A JP55072188 A JP 55072188A JP 7218880 A JP7218880 A JP 7218880A JP S5762004 A JPS5762004 A JP S5762004A
- Authority
- JP
- Japan
- Prior art keywords
- parts
- optical fiber
- cladding
- coating
- cores
- 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
- 239000013307 optical fiber Substances 0.000 title abstract 4
- 238000005253 cladding Methods 0.000 abstract 4
- 239000011248 coating agent Substances 0.000 abstract 3
- 238000000576 coating method Methods 0.000 abstract 3
- 238000001514 detection method Methods 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000000835 fiber Substances 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
- G01M3/165—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means by means of cables or similar elongated devices, e.g. tapes
Abstract
PURPOSE:To reduce the transmisson loss of an optical fiber while increasing its oil leakage detection precision by providing optically discontinuous parts to a core part or a cladding part lengthwise and irregularly and by removing the coating parts of the discontinuous parts. CONSTITUTION:For example, when an invented optical fiber is laid along a pipe- line for oil transportation, leaking oil sticking to a cut part 4 where no coating 5 is provided is detected. In addition, cores 1 and 6 and cladding part 3 have optically discontinuous parts i.e. reduction parts 2 or large-diameter parts 7 irregularly at prescribed invervals, so light transmitted in the cores enters the cladding parts 3 at the discontinuous parts. Therefore, the sensitivity of oil detection is increased. If the fiber is laid almost linearly, the light in the cladding parts 3 enters the cores again and the transmission loss of the parts except the cut parts 4 is held nearly equal to that of a general optical fiber in coorperation with the coating 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55072188A JPS5762004A (en) | 1980-05-30 | 1980-05-30 | Optical fiber for detecting oil leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55072188A JPS5762004A (en) | 1980-05-30 | 1980-05-30 | Optical fiber for detecting oil leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5762004A true JPS5762004A (en) | 1982-04-14 |
Family
ID=13481978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55072188A Pending JPS5762004A (en) | 1980-05-30 | 1980-05-30 | Optical fiber for detecting oil leakage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5762004A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59171903A (en) * | 1983-03-18 | 1984-09-28 | Furukawa Electric Co Ltd:The | Liquid detecting optical fiber |
| JPS62217205A (en) * | 1986-03-06 | 1987-09-24 | サントル・スイス・デレクトロニク・エ・ド・ミクロテクニク・ソシエテ・アノニム | Fiber optic sensor |
| US5532493A (en) * | 1994-01-21 | 1996-07-02 | The United States Of America As Represented By The Secretary Of The Air Force | Optical waveguide chemical and biological sensor |
-
1980
- 1980-05-30 JP JP55072188A patent/JPS5762004A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59171903A (en) * | 1983-03-18 | 1984-09-28 | Furukawa Electric Co Ltd:The | Liquid detecting optical fiber |
| JPS62217205A (en) * | 1986-03-06 | 1987-09-24 | サントル・スイス・デレクトロニク・エ・ド・ミクロテクニク・ソシエテ・アノニム | Fiber optic sensor |
| US5532493A (en) * | 1994-01-21 | 1996-07-02 | The United States Of America As Represented By The Secretary Of The Air Force | Optical waveguide chemical and biological sensor |
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