JP3125390B2 - Optical fiber cable for sensor - Google Patents
Optical fiber cable for sensorInfo
- Publication number
- JP3125390B2 JP3125390B2 JP03347922A JP34792291A JP3125390B2 JP 3125390 B2 JP3125390 B2 JP 3125390B2 JP 03347922 A JP03347922 A JP 03347922A JP 34792291 A JP34792291 A JP 34792291A JP 3125390 B2 JP3125390 B2 JP 3125390B2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- sensor
- metal tube
- fiber cable
- metal
- 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.)
- Expired - Fee Related
Links
- 239000013307 optical fiber Substances 0.000 title claims description 43
- 239000002184 metal Substances 0.000 claims description 36
- 239000012528 membrane Substances 0.000 description 12
- 239000000126 substance Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229920000544 Gore-Tex Polymers 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- -1 for example Inorganic materials 0.000 description 1
- 210000002816 gill Anatomy 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000013076 target substance Substances 0.000 description 1
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は各種センサ用として使用
される金属管入りのセンサ用光ファイバケーブルに関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber cable for a sensor containing a metal tube used for various sensors.
【０００２】[0002]
【従来の技術】光ファイバ自体をセンサ検出部として利
用したセンサとしては、ガスセンサや液体センサ等が考
えられている。これらは、検出対象であるガスや油等が
光ファイバ表面に接触することによって、あるいは光フ
ァイバに浸透することによって光ファイバ内の光の伝送
特性が変化することを利用し、その変化量を測定するも
のである。2. Description of the Related Art As a sensor using an optical fiber itself as a sensor detecting section, a gas sensor, a liquid sensor, and the like are considered. They measure the amount of change by using the fact that the gas or oil to be detected comes into contact with the optical fiber surface or penetrates into the optical fiber, thereby changing the light transmission characteristics within the optical fiber. Is what you do.
【０００３】一方、センサ用光ファイバを検出したい場
所に布設する場合、光ファイバの機械的保護や、光ファ
イバに悪影響を及ぼす物質からの保護の目的で光ファイ
バを金属管内に収納した構造の光ファイバケーブルを利
用すると有益な場合が多い。この種の光ファイバケーブ
ルは温度検出等の目的で既に実用化されている。On the other hand, when a sensor optical fiber is laid at a place where detection is desired, an optical fiber having a structure in which the optical fiber is housed in a metal tube is provided for the purpose of mechanical protection of the optical fiber and protection from substances that adversely affect the optical fiber. The use of fiber cables is often beneficial. This type of optical fiber cable has already been put to practical use for the purpose of temperature detection and the like.
【０００４】[0004]
【発明が解決しようとする課題】上述のように、光ファ
イバを金属管内に収納した場合、例えば温度測定では測
定対象である温度が光ファイバに伝わるので問題はない
が、ガスや油、水等の液体の測定においては、これらが
直接光ファイバに接触する必要があるが、光ファイバが
金属管内に収納されているため、測定出来ないという問
題がある。As described above, when an optical fiber is housed in a metal tube, there is no problem in, for example, temperature measurement because the temperature to be measured is transmitted to the optical fiber. These liquids need to be in direct contact with the optical fiber in the measurement of the liquid, but there is a problem that the measurement cannot be performed because the optical fiber is housed in the metal tube.
【０００５】しかし、光ファイバを裸で測定対象物に接
触出来る場合は、機械的強度の面から考えて極めてまれ
である。又その様な光ファイバセンサでは、測定したい
対象物以外の物質の影響を極力排除して測定したい場合
が多く、例えば、メタンガスの検出センサでは、光ファ
イバに影響を与える水は光ファイバに接触させたくな
い。However, it is extremely rare that the optical fiber can be barely contacted with the object to be measured in view of mechanical strength. In such an optical fiber sensor, it is often desired to remove the influence of a substance other than the object to be measured as much as possible.For example, in a methane gas detection sensor, water that affects the optical fiber is brought into contact with the optical fiber. I do not want to.
【０００６】[0006]
【課題を解決するための手段】本発明は上述の課題を解
決し、金属管内に光ファイバを収納することによって、
光ファイバを機械的に保護し、かつ、検出したい物質を
センサである光ファイバに接触させることを可能にした
センサ用光ファイバケーブルを提供するもので、その特
徴は、光ファイバを収納した金属管の管壁に長さ方向に
一定の間隔をおいて複数個の開口部を設け、この開口部
に選択透過膜を設けたことにある。選択透過膜を設ける
位置は開口部の内側でも外側でも構わない。 SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and accommodates an optical fiber in a metal tube.
A sensor optical fiber cable that mechanically protects an optical fiber and allows a substance to be detected to come into contact with an optical fiber as a sensor, and is characterized by a metal tube containing the optical fiber. It provided a plurality of openings at a certain interval in the longitudinal direction to the tube wall, the opening
Is provided with a permselective membrane . Provide a permselective membrane
The position may be inside or outside the opening.
【０００７】[0007]
【作用】上述した本発明のセンサ用光ファイバケーブル
においては、光ファイバを収納した金属管の管壁に長さ
方向に間隔をおいて複数個の開口部を設けてあるので、
測定対象物であるガス、油、水等の流体が上記開口部を
通して金属管内に侵入する。これにより測定対象物が光
ファイバと接触し測定が可能となる。In the above-described optical fiber cable for a sensor according to the present invention, a plurality of openings are provided at intervals in the length direction on the tube wall of the metal tube containing the optical fiber.
Fluids such as gas, oil, and water to be measured enter the metal pipe through the opening. As a result, the object to be measured comes into contact with the optical fiber, and the measurement can be performed.
【０００８】また、前記開口部に設けた選択透過膜によ
り、測定したい物質のみが金属管内に侵入し、光ファイ
バに悪影響を及ぼすような対象物以外の物質を排除する
ことが可能となる。[0008] Further, according to the permselective membrane provided in the opening , only a substance to be measured enters the metal tube and a substance other than the target substance which adversely affects the optical fiber is excluded. Becomes possible.
【０００９】[0009]
【実施例】図１は選択透過膜を設ける前の本発明のセン
サ用光ファイバケーブルの具体例の斜視図である。図面
において１は光ファイバガラス上に樹脂被覆層を設けた
光ファイバで、金属管２内に収納されており、上記金属
管２の管壁には長さ方向に一定の間隔をおいて複数個の
開口部３が設けられている。上記金属管２としては機械
的強度が強く、錆難い材料、例えばステンレス鋼等が用
いられ、一般に外径が０．９ｍｍから１０ｍｍ程度、厚
さ０．１から３ｍｍ程度のものが用いられる。開口部３
の形状は自由であるが、製造上、円形あるいは四角形が
作り易い。又金属管は、テープ状の金属を円筒状に成形
しながら側縁の合せ目を連続的に溶接する製造方法を用
いることが多く、テープに対して開口部を加工すること
で比較的容易に製造可能である。FIG. 1 is a perspective view of a specific example of an optical fiber cable for a sensor according to the present invention before a selective permeable film is provided . In the drawing, reference numeral 1 denotes an optical fiber in which a resin coating layer is provided on an optical fiber glass, which is housed in a metal tube 2, and a plurality of the optical fibers are provided on the tube wall of the metal tube 2 at regular intervals in the length direction. Opening 3 is provided. The metal tube 2 is made of a material having high mechanical strength and less rust, for example, stainless steel, and generally has an outer diameter of about 0.9 mm to 10 mm and a thickness of about 0.1 to 3 mm. Opening 3
Can be freely shaped, but it is easy to make a circle or a square in manufacturing. In addition, metal pipes are often manufactured using a method in which tape-shaped metal is formed into a cylindrical shape and the seam of the side edges is continuously welded, and the opening is formed relatively easily in the tape. Manufacturable.
【００１０】図２は上述の金属テープを用いて金属管２
を成形する一例の説明図で、図２（イ）はテープの状態
図、図２（ロ）は金属管２成形の状態図である。図面に
示すように、ステンレス鋼等の金属テープ２１に、あら
かじめ一定の間隔をおいて開口部３を形成しておく。そ
して、上記金属テープ２１を成形機（図示せず）を用い
て円筒状に成形し、テープの両側縁の合せ目を溶接２２
して金属管２を得る。FIG. 2 shows a metal tube 2 using the above-described metal tape.
FIG. 2A is a state diagram of a tape, and FIG. 2B is a state diagram of a metal tube 2 formed. As shown in the drawing, openings 3 are formed in a metal tape 21 of stainless steel or the like at predetermined intervals. Then, the metal tape 21 is formed into a cylindrical shape using a forming machine (not shown), and the seam at both side edges of the tape is welded 22.
To obtain a metal tube 2.
【００１１】上記の金属管２の開口部に選択透過膜を設
ける。図３は上記同様、金属テープを用いて金属管２を
成形する他の例の説明図で、あらかじめ一定の間隔をお
いて開口部３を形成した金属テープ２１の上面に、選択
透過膜４を貼り付けておく。そして、上記選択透過膜４
の面を内側にして前記同様に円筒状に成形し、テープの
両側縁の合せ目を溶接２２して選択透過膜４を有する金
属管２を得る。上記選択透過膜４としては、例えばゴア
テックス（商標名）のように液体は通さないが気体を通
すものや、人工えらに使用されている酸素を通すもの等
を利用する。A selective permeable membrane is provided at the opening of the metal tube 2.
I can. FIG. 3 is an explanatory view of another example in which the metal tube 2 is formed using a metal tape in the same manner as described above. The selective permeable film 4 is formed on the upper surface of the metal tape 21 in which the openings 3 are formed at predetermined intervals. Paste it. And the above-mentioned permselective membrane 4
Is formed into a cylindrical shape in the same manner as described above, and the seam at both side edges of the tape is welded 22 to obtain the metal tube 2 having the permselective membrane 4. As the permselective membrane 4, for example, a membrane that does not allow liquid to pass but allows gas to pass, such as Gore-Tex (trade name), and a membrane that allows oxygen used for artificial gills to pass is used.
【００１２】図４は本発明のセンサ用光ファイバケーブ
ルの他の具体例の斜視図で長さ方向に間隔をおいて複数
個の開口部３を設け、内部に光ファイバ１を収納した金
属管２の外周上に、選択透過膜のチューブ５を設け、特
定の物質のみを通すようにしたものである。FIG. 4 is a perspective view of another embodiment of the optical fiber cable for a sensor according to the present invention, in which a plurality of openings 3 are provided at intervals in the longitudinal direction, and a metal tube containing the optical fiber 1 therein. A tube 5 of a permselective membrane is provided on the outer periphery of 2 to allow only a specific substance to pass therethrough.
【００１３】[0013]
【発明の効果】以上説明したように、本発明のセンサ用
光ファイバケーブルによれば、光ファイバは金属管によ
って機械的に保護されており、しかも、検出したい物質
はセンサである光ファイバに接触させることが出来るた
め、ガス、油、水等の流体センサとして利用すると極め
て効果的である。さらに、開口部の選択透過膜により光
ファイバに悪影響を及ぼすような検知対象物以外の物質
を排除することができる。 As described above, according to the optical fiber cable for a sensor of the present invention, the optical fiber is mechanically protected by the metal tube, and the substance to be detected is in contact with the optical fiber as the sensor. Therefore, it is extremely effective to use it as a fluid sensor for gas, oil, water, or the like. In addition, light is selectively transmitted through the
Substances other than the detection target that adversely affect the fiber
Can be eliminated.
【図１】本発明のセンサ用光ファイバケーブルの具体例
の斜視図である。FIG. 1 is a perspective view of a specific example of an optical fiber cable for a sensor according to the present invention.
【図２】金属テープを用いて金属管を成形する一例の説
明図で、図２（イ）はテープの状態図、図２（ロ）は金
属管成形の状態図である。FIGS. 2A and 2B are explanatory views of an example of forming a metal tube using a metal tape. FIG. 2A is a state diagram of the tape, and FIG. 2B is a state diagram of forming the metal tube.
【図３】金属テープを用いて金属管を成形する他の例の
説明図である。FIG. 3 is an explanatory view of another example of forming a metal tube using a metal tape.
【図４】本発明のセンサ用光ファイバケーブルの他の具
体例の斜視図である。FIG. 4 is a perspective view of another specific example of the optical fiber cable for a sensor according to the present invention.
１ 光ファイバ ２ 金属管 ２１ 金属テープ ２２ 溶接部 ３ 開口部 ４ 選択透過膜 ５ 選択透過膜チューブ DESCRIPTION OF SYMBOLS 1 Optical fiber 2 Metal tube 21 Metal tape 22 Weld part 3 Opening 4 Selective permeable membrane 5 Selective permeable membrane tube
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｇ０２Ｂ 6/44 ３９６ Ｇ０２Ｂ 6/44 ３９６ (58)調査した分野(Int.Cl.7，ＤＢ名) G01D 21/00 G01K 11/12 G02B 6/00 - 6/02 G02B 6/44 321 - 396 ──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. 7 identification code FI G02B 6/44 396 G02B 6/44 396 (58) Investigated field (Int.Cl. 7 , DB name) G01D 21/00 G01K 11 / 12 G02B 6/00-6/02 G02B 6/44 321-396
Claims (1)
り、上記金属管の管壁に長さ方向に一定の間隔をおいて
複数個の開口部を設け、この開口部に選択透過膜を持つ
ことを特徴とするセンサ用光ファイバケーブル。An optical fiber is housed in a metal tube, and a plurality of openings are provided in the tube wall of the metal tube at regular intervals in a longitudinal direction, and the openings have a selectively permeable film. An optical fiber cable for a sensor, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03347922A JP3125390B2 (en) | 1991-12-02 | 1991-12-02 | Optical fiber cable for sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03347922A JP3125390B2 (en) | 1991-12-02 | 1991-12-02 | Optical fiber cable for sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05157589A JPH05157589A (en) | 1993-06-22 |
| JP3125390B2 true JP3125390B2 (en) | 2001-01-15 |
Family
ID=18393526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03347922A Expired - Fee Related JP3125390B2 (en) | 1991-12-02 | 1991-12-02 | Optical fiber cable for sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3125390B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208274A (en) * | 2019-06-28 | 2019-09-06 | 中国地震局地震研究所 | Fiber grating steel bar corrosion sensor and preparation method thereof |
| EP3832365B1 (en) | 2019-12-05 | 2023-08-30 | Nexans | Method for the continuous production of optical fibre conductor sensors mounted in a perforated metal hollow profile |
-
1991
- 1991-12-02 JP JP03347922A patent/JP3125390B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05157589A (en) | 1993-06-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |