JPS6224252Y2 - - Google Patents
Info
- Publication number
- JPS6224252Y2 JPS6224252Y2 JP15441582U JP15441582U JPS6224252Y2 JP S6224252 Y2 JPS6224252 Y2 JP S6224252Y2 JP 15441582 U JP15441582 U JP 15441582U JP 15441582 U JP15441582 U JP 15441582U JP S6224252 Y2 JPS6224252 Y2 JP S6224252Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- coating layer
- optical fiber
- resistant coating
- core
- 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
Links
- 239000013307 optical fiber Substances 0.000 claims description 27
- 239000011247 coating layer Substances 0.000 claims description 26
- 238000005253 cladding Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 5
- 239000003921 oil Substances 0.000 description 31
- 230000005540 biological transmission Effects 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- -1 fluororesin Polymers 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920005749 polyurethane resin Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000000113 methacrylic resin Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229920000638 styrene acrylonitrile Polymers 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Description
【考案の詳細な説明】
本考案は油漏れ検知に用いて好適な光フアイバ
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical fiber suitable for use in detecting oil leaks.
貯油設備や配管等から漏洩するガソリン、灯
油、重油等の油類を検知する光フアイバとして第
１図イ，ロに示すようなものがあつた。イに示す
ものはコアａのみからなるものであり、ロに示す
ものはコアａの外周にクラツドｂを設けたもので
ある。 Optical fibers shown in Figure 1 A and B were used to detect oils such as gasoline, kerosene, and heavy oil leaking from oil storage equipment and piping. The one shown in (a) consists of only a core a, and the one shown in (b) has a clad b provided around the outer periphery of the core a.
このうちイのものはコアａに油が付着すると、
ロのものはクラツドｂに付着した油がコアａに達
すると夫々光フアイバ中の光の透過率が減少する
ことを利用して油漏れを検知するものである。 Among these, when oil adheres to core a,
The second type detects oil leakage by utilizing the fact that when the oil adhering to the cladding b reaches the core a, the transmittance of light in each optical fiber decreases.
しかし第１図イの光フアイバは裸であるため外
傷を受け易く、強度が弱いという難点があり、更
には長距離の光伝送能力に劣るという能力もあ
る。 However, since the optical fiber shown in FIG. 1A is bare, it is easily damaged and has low strength, and furthermore, it has poor long-distance optical transmission capability.
第１図ロの光フアイバではクラツドｂとしてシ
リコンゴムが使用されるため強度は比較的強い
が、クラツドｂを厚くすると油の検知感度が低下
するという難点がある。そのため油の検知感度を
満足させるためには、クラツドｂの厚さを10μｍ
以下にするのが適当であるが、この厚さでは機械
的強度が必ずしも満足できるものではない。更に
はクラツドｂが肉薄になると光の透過率の低下も
避けられず、そのため長距離伝送もむずかしいと
いう難点もある。 In the optical fiber shown in FIG. 1B, silicone rubber is used as the cladding b, so the strength is relatively strong, but there is a problem in that if the cladding b is made thicker, the oil detection sensitivity decreases. Therefore, in order to satisfy the oil detection sensitivity, the thickness of clad b must be 10 μm.
Although it is appropriate to set the thickness below, the mechanical strength is not necessarily satisfactory at this thickness. Furthermore, when the clad b becomes thinner, it is inevitable that the light transmittance will decrease, making long-distance transmission difficult.
本考案はこれらの諸問題を解決するため第２図
〜第５図に示すように、光フアイバ１の外側に、
耐油性被覆層２と非耐油性被覆層３とを設けるよ
うにしたものである。 In order to solve these problems, the present invention has a structure in which, as shown in FIGS. 2 to 5, a
An oil-resistant coating layer 2 and a non-oil-resistant coating layer 3 are provided.
本考案の実施例として第２図に示すものは光フ
アイバ１が単心の場合であり、第３図に示すもの
は光フアイバ１が多心の場合であり、いずれの場
合もコア４の外周にクラツド５を設けた光フアイ
バ１の外周に１次被覆層６を設け、その外周の上
方半周部分に耐油性被覆層２を設け、下方半周部
分に非耐油性被覆３を設けてなるものである。 As an embodiment of the present invention, the optical fiber 1 shown in FIG. 2 is a single-core optical fiber, and the optical fiber 1 shown in FIG. 3 is a multi-core optical fiber. A primary coating layer 6 is provided on the outer periphery of an optical fiber 1 provided with a cladding 5, an oil-resistant coating layer 2 is provided on the upper half of the outer periphery, and a non-oil resistant coating 3 is provided on the lower half of the outer periphery. be.
一次被覆層６としては、シリコンゴム、アクリ
ル系樹脂、ポリウレタン樹脂、ナイロン、フツ素
系樹脂等を用いる。 As the primary coating layer 6, silicone rubber, acrylic resin, polyurethane resin, nylon, fluorine resin, etc. are used.
耐油性被覆層２としては、ナイロン、ABS樹
脂、ポリアセタール、メタアクリル樹脂、ふつ素
樹脂、ポリカーボネート、フエノール樹脂、エポ
キシ樹脂などを用いる。 As the oil-resistant coating layer 2, nylon, ABS resin, polyacetal, methacrylic resin, fluororesin, polycarbonate, phenol resin, epoxy resin, etc. are used.
非耐油性被覆層３としては油溶性のものとか、
油に膨潤するものなどを用いる。これらの例とし
ては、アスフアルト、ワツクス、スチレン−ブタ
ジエン共重合体、ポリイソブチレン、軟質塩化ビ
ニル、シリコーン樹脂、ポリスチレン、ピネン系
ポリマ、ポリエチレン、SAN樹脂等がある。 The non-oil-resistant coating layer 3 may be an oil-soluble one,
Use something that swells in oil. Examples of these include asphalt, wax, styrene-butadiene copolymer, polyisobutylene, soft vinyl chloride, silicone resin, polystyrene, pinene polymer, polyethylene, SAN resin, and the like.
本考案における光フアイバは、コア４とクラツ
ド５とが共に石英系ガラスからなるものでも、プ
ラスチツクからなるものでもよく、又コア４が石
英系ガラスでクラツド５がプラスチツクからなる
ものでもよい。 In the optical fiber of the present invention, both the core 4 and the cladding 5 may be made of quartz glass or plastic, or the core 4 may be made of quartz glass and the cladding 5 may be made of plastic.
本考案の他例として第５図に示すものはコア
４、クラツド５から構成される光フアイバ１は第
２図、第３図のものと同じものであるが、１次被
覆６を非耐油性材で成形して非耐油性被覆層３と
し、その外周の上方半周部分に耐油性被覆層２を
設けたものである。 Another example of the present invention is shown in FIG. 5, in which the optical fiber 1 consisting of a core 4 and a cladding 5 is the same as that in FIGS. 2 and 3, but the primary coating 6 is made non-oil resistant. A non-oil-resistant coating layer 3 is formed by molding the material, and an oil-resistant coating layer 2 is provided on the upper half of the outer periphery.
第５図に示すものは第４図とは逆に１次被覆層
６を耐油性材で成形した耐油性被覆層２とし、そ
の外周の上方半周部分に非耐油性被覆層３を設け
てなるものである。 In the case shown in FIG. 5, contrary to FIG. 4, the primary coating layer 6 is an oil-resistant coating layer 2 formed of an oil-resistant material, and a non-oil-resistant coating layer 3 is provided on the upper half of the outer circumference. It is something.
本考案の実験例として、コア径80μｍ、外径
125μｍの石英系ガラスの光フアイバを、ポリウ
レタン樹脂で厚さ５μｍに一次被覆し、これを20
本並べて厚さ0.5mmのナイロンテープ（耐油性
材）と、厚さ0.5μｍの塩化ビニールテープ（非
耐油性材）とで夫々第４図のように被覆し、両者
の接合部を熱溶着させてテープ状にし、更に20本
の光フアイバの長手方向両端を夫々集束した。集
束した光フアイバの一端からLEDにより光を入
射し、他端からその光を受けて受光量を測定し
た。この場合、テープによる被覆層を重油槽に浸
漬したところ受光量が減衰し油検知を行なうこと
ができた。こゝで受光量が減衰するのは外周に油
が付着すると非耐油性被覆層３が溶解、膨潤など
を起し、フアイバにかゝる側圧のバランスがくず
れ、光フアイバ１がマイクロベンドを起して光伝
送損失の増加を招くという原理によるものと思わ
れる。 As an experimental example of this invention, a core diameter of 80 μm and an outer diameter of
A 125 μm silica glass optical fiber was first coated with polyurethane resin to a thickness of 5 μm, and then
These are lined up and covered with 0.5 mm thick nylon tape (oil resistant material) and 0.5 μm thick vinyl chloride tape (non oil resistant material) as shown in Figure 4, and the joints of both are heat welded. The 20 optical fibers were then made into a tape, and both longitudinal ends of the 20 optical fibers were bundled. Light was input from one end of the focused optical fiber using an LED, and the amount of light received was measured by receiving the light from the other end. In this case, when the tape coating layer was immersed in a heavy oil tank, the amount of light received attenuated, making it possible to detect oil. The amount of light received is attenuated because when oil adheres to the outer periphery, the non-oil-resistant coating layer 3 dissolves and swells, which upsets the balance of lateral pressure on the fiber and causes microbends in the optical fiber 1. This seems to be based on the principle that this increases the optical transmission loss.
尚前記実験例におけるテープ状の光フアイバの
光伝送損失は3.5dB／kw（λ＝0.85μｍ）であ
り、極めて優れたものであつた。又同光フアイバ
の引張強度は平均５Kg／フアイバ以上であり、極
めて優れたものであつた。 The optical transmission loss of the tape-shaped optical fiber in the above experimental example was 3.5 dB/kw (λ=0.85 μm), which was extremely excellent. Furthermore, the tensile strength of the optical fiber was on average 5 kg/fiber or more, which was extremely excellent.
本考案は叙上のように、光フアイバ１の外側に
耐油性被覆層２と非耐油性被覆層３とを設けてな
るため機械的強度に優れ、しかも非耐油性被覆層
３が油の付着により溶解、膨潤するため油漏れを
高感度で確実に検知することができる。 As mentioned above, the present invention has an oil-resistant coating layer 2 and a non-oil-resistant coating layer 3 provided on the outside of the optical fiber 1, so it has excellent mechanical strength. Because it dissolves and swells, oil leaks can be detected reliably and with high sensitivity.
第１図イ，ロは従来の光フアイバの説明図、第
２図〜第５図は本考案の各種例を示す説明図であ
る。
１は光フアイバ、２は耐油性被覆層、３は非耐
油性被覆層、４はコア、５はクラツド、６は１次
被覆層。
1A and 1B are explanatory diagrams of a conventional optical fiber, and FIGS. 2 to 5 are explanatory diagrams showing various examples of the present invention. 1 is an optical fiber, 2 is an oil-resistant coating layer, 3 is a non-oil-resistant coating layer, 4 is a core, 5 is a cladding, and 6 is a primary coating layer.
Claims (1)
の外周の一部に耐油性被覆層が外部に露出する
よう設けられ、同外周の他の部分に非耐油性被
覆層が外部に露出するよう設けられてなる油等
の検知用光フアイバ。 (2) 光フアイバの外周に１次被覆層を設け、その
外側に耐油性被覆層と非耐油性被覆層とが設け
られてなる実用新案登録請求の範囲第１項記載
の油等の検知用光フアイバ。 (3) １次被覆層が非耐油性材で成形されてなる実
用新案登録請求の第２項記載の油等の検知用光
フアイバ。[Claims for Utility Model Registration] (1) An oil-resistant coating layer is provided on a part of the outer periphery of the optical fiber consisting of a core and a cladding, and a non-oil-resistant coating layer is provided on the other part of the outer periphery. An optical fiber for detecting oil, etc., whose coating layer is exposed to the outside. (2) A device for detecting oil, etc. as set forth in claim 1 of the utility model registration claim, which comprises a primary coating layer provided on the outer periphery of the optical fiber, and an oil-resistant coating layer and a non-oil-resistant coating layer provided on the outside thereof. optical fiber. (3) The optical fiber for detecting oil, etc. as set forth in item 2 of the utility model registration request, in which the primary coating layer is formed of a non-oil resistant material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15441582U JPS5958404U (en) | 1982-10-12 | 1982-10-12 | Optical fiber for detecting oil etc. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15441582U JPS5958404U (en) | 1982-10-12 | 1982-10-12 | Optical fiber for detecting oil etc. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5958404U JPS5958404U (en) | 1984-04-16 |
| JPS6224252Y2 true JPS6224252Y2 (en) | 1987-06-20 |
Family
ID=30341343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15441582U Granted JPS5958404U (en) | 1982-10-12 | 1982-10-12 | Optical fiber for detecting oil etc. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5958404U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10416004B2 (en) * | 2016-05-02 | 2019-09-17 | Mitsubishi Electric Corporation | Resin impregnation detection device, coil for rotating machine, and method for impregnating and molding resin of coil for rotating machine |
-
1982
- 1982-10-12 JP JP15441582U patent/JPS5958404U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5958404U (en) | 1984-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS587362Y2 (en) | plastic fiber | |
| US4505542A (en) | Thermostatic fiber optic waveguides | |
| US4373768A (en) | Thermostatic fiber optic waveguides | |
| JPS57106838A (en) | Optical fiber for sensor | |
| US3877490A (en) | Steel pipes provided with plastic coatings | |
| JPS6224252Y2 (en) | ||
| US7200306B2 (en) | Optical fiber cable with a central reinforcing element mechanically coupled directly to the optical fibers | |
| CN207799189U (en) | A kind of multicore communications optical cable for house wiring | |
| JPH0128441Y2 (en) | ||
| JPH04148836A (en) | Liquid-leakage detecting apparatus | |
| CN210038243U (en) | Novel parallel optical fiber boot | |
| JP3727390B2 (en) | High speed plastic optical fiber | |
| JPS6224243Y2 (en) | ||
| EP0618465B1 (en) | Fluid filled optical waveguide | |
| JPS5981530A (en) | Optical fiber liquid leakage detector | |
| JPS5983106A (en) | Optical fiber for detecting liquid leakage | |
| CN214311013U (en) | Submarine armored optical cable tail end strength eliminating device with optical fiber redundancy device | |
| JPS59188533A (en) | Optical fiber for oil leak detection | |
| JPS5930885Y2 (en) | optical fiber | |
| JPS60166837A (en) | Detection of leaked oil | |
| EP0037266A2 (en) | Method and apparatus for controlling the temperature of or indicating the presence of a material by means of a waveguide, heat activatable articles incorporating waveguides; and novel waveguides and a method of making such waveguides | |
| JPS5895243A (en) | Detection of oil leakage point for of cable line | |
| JPS60209143A (en) | Liquid sensor | |
| JPH0428082B2 (en) | ||
| JPS61284627A (en) | Optical fiber sensor |