JPS641935A - Submergence detection sensor for optical fiber - Google Patents
Submergence detection sensor for optical fiberInfo
- Publication number
- JPS641935A JPS641935A JP15693887A JP15693887A JPS641935A JP S641935 A JPS641935 A JP S641935A JP 15693887 A JP15693887 A JP 15693887A JP 15693887 A JP15693887 A JP 15693887A JP S641935 A JPS641935 A JP S641935A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- submergence
- expansion
- quickly
- water absorption
- 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
- Investigating Or Analysing Materials By Optical Means (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
PURPOSE: To detect submergence points accurately and quickly, by providing an expansion inhibiting material outside a water absorption expanding material covering the entire circumference of a tension member to arrange an optical fiber deviated from the center of the material.
CONSTITUTION: In case of a submergence accident, a water absorption material 4 absorbs moisture near a submergence part thereof to be swelled, causing a volume expansion while the volume expansion is suppressed at a part which an expansion inhibiting material 5 abuts. With the suppression thereof, a side pressure is applied to an optical fiber 2 to cause a bending such as microbending in the optical fiber 2. An increase in loss of transmission light due to the microbending caused in the optical fiber 2 is detected by measuring reflected light such as backscattered light of light incident from an input end of the optical fiber 2, thereby enabling detection of the generation of a submergence accident and the position of the generation accurately and quickly.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15693887A JPS641935A (en) | 1987-06-24 | 1987-06-24 | Submergence detection sensor for optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15693887A JPS641935A (en) | 1987-06-24 | 1987-06-24 | Submergence detection sensor for optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH011935A JPH011935A (en) | 1989-01-06 |
| JPS641935A true JPS641935A (en) | 1989-01-06 |
Family
ID=15638629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15693887A Pending JPS641935A (en) | 1987-06-24 | 1987-06-24 | Submergence detection sensor for optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS641935A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02128561U (en) * | 1989-03-29 | 1990-10-23 | ||
| JP2014035312A (en) * | 2012-08-10 | 2014-02-24 | Japan Atomic Energy Agency | Moisture sensor using optical fiber |
| KR20220120327A (en) * | 2021-02-23 | 2022-08-30 | 포항공과대학교 산학협력단 | Humidity detecting method using nanowire and humidity detecting apparatus using nanowire |
-
1987
- 1987-06-24 JP JP15693887A patent/JPS641935A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02128561U (en) * | 1989-03-29 | 1990-10-23 | ||
| JP2014035312A (en) * | 2012-08-10 | 2014-02-24 | Japan Atomic Energy Agency | Moisture sensor using optical fiber |
| KR20220120327A (en) * | 2021-02-23 | 2022-08-30 | 포항공과대학교 산학협력단 | Humidity detecting method using nanowire and humidity detecting apparatus using nanowire |
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