JPH02128561U - - Google Patents
Info
- Publication number
- JPH02128561U JPH02128561U JP3581589U JP3581589U JPH02128561U JP H02128561 U JPH02128561 U JP H02128561U JP 3581589 U JP3581589 U JP 3581589U JP 3581589 U JP3581589 U JP 3581589U JP H02128561 U JPH02128561 U JP H02128561U
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- protective coating
- water
- detection sensor
- immersion detection
- 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 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000007654 immersion Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011253 protective coating Substances 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Description
第１ａ〜２図は本考案の実施例にかかるもので
、第１ａ図はセンサ部分２３の説明図、第１ｂ図
は光フアイバ心線１６の説明図、第１ｃ図はスロ
ツト型ケーブルに適用した例の説明図、第２図は
水につかつた場合における時間と損失増加の関係
を示す線図、第３ａ図は従来技術の説明図、第３
ｂ図は光フアイバ心線１６の説明図。
１１：光フアイバ素線、１４：保護被覆、１６
：光フアイバ心線、１８：心材、２０：吸水膨潤
ひも、２２：ＦＲＰひも、２３：センサ部分、２
４：角パイプ、２６：トンネル状空間、２８：孔
、３４：溝、３６：押え、３８：シース、４０：
光ケーブル。
1a to 2 show an example of the present invention, in which FIG. 1a is an explanatory diagram of the sensor portion 23, FIG. 1b is an explanatory diagram of the optical fiber core 16, and FIG. 1c is an explanatory diagram of the optical fiber core 16. An explanatory diagram of the example, Fig. 2 is a diagram showing the relationship between time and loss increase in the case of immersion in water, Fig. 3a is an explanatory diagram of the prior art, and Fig. 3
Figure b is an explanatory diagram of the optical fiber core wire 16. 11: Optical fiber wire, 14: Protective coating, 16
: Optical fiber core wire, 18: Heart material, 20: Water absorption swelling string, 22: FRP string, 23: Sensor part, 2
4: square pipe, 26: tunnel-like space, 28: hole, 34: groove, 36: presser foot, 38: sheath, 40:
optical cable.
Claims (1)
線に共通の保護被覆を施した光フアイバ心線を巻
つけたものに、吸水膨潤ひもを添わせてセンサ部
分を構成し；そのセンサ部分を、変形しにくくか
つ透水可能な材料によつて四方の壁面を構成した
細長いトンネル状空間内に引入れた分布型浸水検
知センサにおいて、 前記複数の光フアイバ素線を撚合わせ、その上
に保護被覆を施して光フアイバ心線とした、分布
型浸水検知センサ。[Scope of Claim for Utility Model Registration] A core made of a hard material is wrapped with an optical fiber core wire coated with a common protective coating for a plurality of optical fiber strands, and a water-absorbing swelling string is attached to the sensor portion. In a distributed water immersion detection sensor whose sensor portion is drawn into a long and narrow tunnel-like space whose four walls are made of a material that is difficult to deform and is permeable to water, the plurality of optical fiber wires are twisted. A distributed water immersion detection sensor that is made of optical fiber with a protective coating applied over it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3581589U JPH02128561U (en) | 1989-03-29 | 1989-03-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3581589U JPH02128561U (en) | 1989-03-29 | 1989-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02128561U true JPH02128561U (en) | 1990-10-23 |
Family
ID=31541500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3581589U Pending JPH02128561U (en) | 1989-03-29 | 1989-03-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02128561U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62837A (en) * | 1985-06-27 | 1987-01-06 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber water immersion detection line and water immersion detection type optical fiber cable |
| JPS6228703A (en) * | 1985-07-31 | 1987-02-06 | Nippon Telegr & Teleph Corp <Ntt> | Optical transmission line and optical fiber cable for detecting water permeation |
| JPS641935A (en) * | 1987-06-24 | 1989-01-06 | Fujikura Ltd | Submergence detection sensor for optical fiber |
-
1989
- 1989-03-29 JP JP3581589U patent/JPH02128561U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62837A (en) * | 1985-06-27 | 1987-01-06 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber water immersion detection line and water immersion detection type optical fiber cable |
| JPS6228703A (en) * | 1985-07-31 | 1987-02-06 | Nippon Telegr & Teleph Corp <Ntt> | Optical transmission line and optical fiber cable for detecting water permeation |
| JPS641935A (en) * | 1987-06-24 | 1989-01-06 | Fujikura Ltd | Submergence detection sensor for optical fiber |
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