JPH05273415A - Method for fixing optical fiber - Google Patents

Method for fixing optical fiber

Info

Publication number
JPH05273415A
JPH05273415A JP4071332A JP7133292A JPH05273415A JP H05273415 A JPH05273415 A JP H05273415A JP 4071332 A JP4071332 A JP 4071332A JP 7133292 A JP7133292 A JP 7133292A JP H05273415 A JPH05273415 A JP H05273415A
Authority
JP
Japan
Prior art keywords
resin
optical fiber
layer
potting
modulus
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
Application number
JP4071332A
Other languages
Japanese (ja)
Inventor
Satoru Takasugi
哲 高杉
Masashi Nakamura
正志 中村
Tatsuo Teraoka
達夫 寺岡
Takeshi Okubo
豪 大窪
Koichi Shiga
浩一 志賀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP4071332A priority Critical patent/JPH05273415A/en
Publication of JPH05273415A publication Critical patent/JPH05273415A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439Auxiliary devices
    • G02B6/4457Bobbins; Reels

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Gyroscopes (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

PURPOSE:To increase the natural oscillation frequency of a potting part and to avert resonance by further providing a resin layer on the surface of a potted resin. CONSTITUTION:The resin for potting an optical fiber is formed in two layers. The resin having an extra-low Young's modulus is used for the first layer and the resin 5 having a high Young's modulus is used for the second layer. The resin 1 to be used for the first layer is required to have a role as a buffer layer of the optical fiber and the resin 5 to be used for the second layer is required to have a role as a protective layer. Further, the resin 1 used for the first layer and the resin 5 used for the second layer are required to be adhered with each other, and therefore, the resins having tackiness on the surface are more preferable. Namely, an optical fiber coil 4 is disposed within a case 2 provided on a structural body 3 and the resin 1 (for example, silicone gel) is poured into the case and is cured to fix the optical fiber. Further, the resin 5 (for example, polyethylene) is poured therein and is cured to fix the fiber.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の対象】本発明は光ファイバジャイロ等に用いる
角度変位検出用センシング光ファイバコイルの固定方法
に関するものである。
The present invention relates to a method for fixing a sensing optical fiber coil for detecting angular displacement used in an optical fiber gyro or the like.

【0002】[0002]

【従来の技術】ジャイロコンパスは、船舶や各種移動体
の方位センサとして広く利用されている。
2. Description of the Related Art A gyro compass is widely used as a direction sensor for ships and various moving bodies.

【0003】従来このジャイロコンパスとしては、地磁
気センサや機械式ジャイロコンパスが多く使用されて来
たが、近年、これらジャイロに替わり光ファイバジャイ
ロが注目されている。
Conventionally, as the gyro compass, a geomagnetic sensor and a mechanical gyro compass have been widely used, but in recent years, an optical fiber gyro has attracted attention in place of these gyros.

【0004】光ファイバジャイロは、角速度を検出し
て、信号処理することにより方位を検出するもので、小
型であるため車載用ジャイロとして有望なものである。
ところで光ファイバジャイロは、角速度を検出するため
光ファイバコイルを固定する技術が不可欠なものであ
る。
The optical fiber gyroscope detects the azimuth by detecting the angular velocity and performs signal processing, and is promising as a vehicle-mounted gyro because it is small.
By the way, in the optical fiber gyro, a technique for fixing the optical fiber coil is indispensable for detecting the angular velocity.

【0005】従来の光ファイバコイルの固定方法として
は、図2に示したごとくボビン7等の構造体の回りに光
ファイバ8を巻き付け、ボビン7ごと構造体のネジ穴6
に対してネジ止めする等、機械的に固定する方法がとら
れている。
As a conventional method for fixing an optical fiber coil, as shown in FIG. 2, an optical fiber 8 is wound around a structure such as a bobbin 7 and the bobbin 7 is provided with a screw hole 6 for the structure.
A mechanical fixing method such as screwing is used.

【0006】しかしこの場合、光ファイバ8をボビン7
に巻く作業が必要であり、また部品点数も多くなるため
コストがかかる欠点があった。
However, in this case, the optical fiber 8 is connected to the bobbin 7.
There is a drawback that the cost is high because it requires the work of winding it around and the number of parts is large.

【0007】本発明者らは、この欠点を解決するため樹
脂ポッティングにより光ファイバコイルを固定する方法
を先に提案している。即ち図3に示したごとく、構造体
3上のケース2内に束取り状態で配置された光ファイバ
コイル4を低ヤング率の樹脂を流し込み硬化させること
によりポッティングして入る。
The present inventors have previously proposed a method of fixing an optical fiber coil by resin potting in order to solve this drawback. That is, as shown in FIG. 3, the optical fiber coil 4 arranged in a bundled state in the case 2 on the structure 3 is potted by pouring and hardening a resin having a low Young's modulus.

【0008】この場合、外力または温度変化による熱応
力が加わった場合に光ファイバにまで影響が及ばぬよう
にポッティング樹脂には緩衝材としての働きを持たせる
必要があるため、極低ヤング率の樹脂を使用しなくては
ならない。
In this case, the potting resin needs to function as a cushioning material so that the optical fiber is not affected when a thermal stress due to an external force or a temperature change is applied. You must use resin.

【0009】このため樹脂ポッティング部での固有振動
数が低下し、外部からの振動に対して極低い周波数帯域
において共振現象が発生し、ノイズが発生して装置とし
ての性能低下が起こる欠点があった。
For this reason, the natural frequency of the resin potting portion is lowered, a resonance phenomenon occurs in an extremely low frequency band against vibration from the outside, noise is generated, and the performance of the device is deteriorated. It was

【0010】特に車載用光ファイバジャイロとしては、
耐振動特性は最も重要な特性である。
Particularly as an on-vehicle optical fiber gyro,
Vibration resistance is the most important characteristic.

【0011】[0011]

【発明の目的】本発明の目的は、前述した従来技術の欠
点を解決し、低コストでしかも耐振動特性に優れた光フ
ァイバの固定構造を提供することにある。
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks of the prior art and to provide an optical fiber fixing structure which is low in cost and excellent in vibration resistance.

【0012】[0012]

【発明の要点】本発明の要旨は、光ファイバをポッティ
ングする樹脂を2層にすることにあり、1層目には極低
ヤング率である樹脂を用い、2層目に高ヤング率である
樹脂を用いることにより、低コストでありながらしかも
耐振特性を向上させたものである。
The gist of the present invention is to use two layers of resin for potting an optical fiber. A resin having an extremely low Young's modulus is used for the first layer and a high Young's modulus is used for the second layer. By using a resin, the vibration resistance is improved at a low cost.

【0013】第1層目に用いる樹脂には光ファイバの緩
衝層としての役割を持たせるためにそのヤング率は1Kg
/mm2 以下であることが望ましい。また2層目に用いる
樹脂に関しては保護層としての役割を持たせる必要があ
るため、そのヤング率は1Kg/mm2 以上100Kg/mm2
程度であることが望ましい。
The Young's modulus of the resin used as the first layer is 1 kg in order to serve as a buffer layer of the optical fiber.
/ Mm 2 or less is desirable. Since the resin used for the second layer needs to have a role as a protective layer, its Young's modulus is 1 kg / mm 2 or more and 100 kg / mm 2
It is desirable that it is a degree.

【0014】また第1層目に用いる樹脂と第2層目に用
いる樹脂は互いに密着している必要があるため表面に粘
着性のある樹脂が好ましい。
Since the resin used for the first layer and the resin used for the second layer must be in close contact with each other, a resin having an adhesive surface is preferable.

【0015】また第2層目に用いる樹脂は全ポッティン
グ厚さに対して極薄くて良い。
The resin used for the second layer may be extremely thin with respect to the total potting thickness.

【0016】[0016]

【発明の実施例】図1(a)に示したごとく構造体3上
に設けられたケース内2に光ファイバコイル4を配置
し、その上に硬化後のヤング率が0.002Kg/mm2
ある樹脂1(例えばシリコンゲル)を流し込み硬化させ
て、光ファイバコイルを固定する。
BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1 (a), an optical fiber coil 4 is placed in a case 2 provided on a structure 3, and a Young's modulus after curing is 0.002 Kg / mm 2 Resin 1 (for example, silicon gel) is poured and cured to fix the optical fiber coil.

【0017】さらに(b)に示したごとく硬化後のヤン
グ率が50Kg/mm2 程度の樹脂5(例えばポリエチレ
ン)を流し込み硬化させ固定する。
Further, as shown in (b), a resin 5 (for example, polyethylene) having a Young's modulus after curing of about 50 kg / mm 2 is poured and cured to be fixed.

【0018】上述した方法では樹脂1および樹脂5によ
り、2層にポッティングしたが、樹脂1表面には粘着性
があるため、樹脂5をポッティングする変わりに樹脂1
表面に薄いプラスチック等のフィルムを張り付け、同様
の効果を持たせることも可能である。
In the above-mentioned method, two layers were potted with the resin 1 and the resin 5, but since the surface of the resin 1 is sticky, the resin 1 is potted instead of being potted.
It is also possible to attach a thin film of plastic or the like on the surface to give the same effect.

【0019】[0019]

【発明の効果】以上説明した通りポッティングした樹脂
の表面にさらに堅い樹脂層を設けることにより、見かけ
上の等価的なヤング率を高く設定できるため、ポッティ
ング部の固有振動数が高くなり、共振現象を避けること
ができる。
As described above, by providing a stiffer resin layer on the surface of the potted resin, the apparent equivalent Young's modulus can be set to a high value, so that the natural frequency of the potting portion becomes high and the resonance phenomenon occurs. Can be avoided.

【0020】従来のように単一の樹脂でポッティングし
た場合では図4(b)に示したごとくその固有振動数は
54Hz程度となるが、本実施例のように2種類の樹脂で
ポッティングした場合では図4(c)に示したごとく1
57Hz程度となる。
When potting with a single resin as in the prior art, its natural frequency is about 54 Hz as shown in FIG. 4B, but when potting with two types of resin as in this embodiment. Then, as shown in FIG.
It becomes about 57Hz.

【0021】また表面に堅い層を設けることにより、ポ
ッティング部の機械的強度を上げることができる。
By providing a hard layer on the surface, the mechanical strength of the potting portion can be increased.

【図面の簡単な説明】[Brief description of drawings]

【図1】(a)は本発明においてケース内に光ファイバ
を配置し、樹脂を流し込みポッティングする工程の説明
図。(b)はさらに第2の樹脂を流し込み固定する工程
の説明図。
FIG. 1A is an explanatory view of a step of placing an optical fiber in a case and pouring resin into the potting in the present invention. (B) is explanatory drawing of the process of pouring and fixing a 2nd resin further.

【図2】従来技術のうち光ファイバをボビンに巻いて、
構造体にネジ止め固定する方法の説明図。
FIG. 2 is a conventional technique in which an optical fiber is wound around a bobbin,
Explanatory drawing of the method of screw-fixing to a structure.

【図3】従来技術のうち光ファイバコイルを単一の樹脂
でポッティングする方法の説明図。
FIG. 3 is an explanatory view of a method of potting an optical fiber coil with a single resin in the prior art.

【図4】(a)は樹脂ポッティング部の有限要素解析モ
デル図、(b)は従来技術の単一の樹脂でのみポッティ
ングした場合の固有振動数解析結果図、(c)は本発明
の2種類の樹脂でポッティングした場合の固有振動数解
析結果図。
4A is a finite element analysis model diagram of a resin potting portion, FIG. 4B is a natural frequency analysis result diagram when potting is performed only by a single resin of a conventional technique, and FIG. The figure of natural frequency analysis result when potting with different types of resin.

【符号の説明】[Explanation of symbols]

1 第1の樹脂 2 ケース 3 構造体 4 光ファイバコイル 5 第2の樹脂 6 ネジ穴 7 ボビン 8 光ファイバ 1 First Resin 2 Case 3 Structure 4 Optical Fiber Coil 5 Second Resin 6 Screw Hole 7 Bobbin 8 Optical Fiber

───────────────────────────────────────────────────── フロントページの続き (72)発明者 大窪 豪 茨城県日立市日高町5丁目1番1号 日立 電線株式会社オプトロシステム研究所内 (72)発明者 志賀 浩一 茨城県日立市日高町5丁目1番1号 日立 電線株式会社オプトロシステム研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Go Okubo 5-1-1 Hidaka-cho, Hitachi-shi, Ibaraki Hitachi Cable Co., Ltd., Optro System Research Laboratory (72) Inventor Koichi Shiga Hidaka-cho, Hitachi-shi, Ibaraki 5-1-1, Hitachi Cable, Ltd. Optro System Research Center

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】構造体の一部に光ファイバを配置する箱を
設け、その内部に光ファイバを配置し、比較的ヤング率
の小さい樹脂をポッティングすることにより光ファイバ
を固定する方法において、光ファイバを完全に埋設した
該ポッティング樹脂表面に該ポッティング樹脂よりもヤ
ング率の大きい樹脂を再度ポッティングして2層ポッテ
ィングすることを特徴とする光ファイバの固定方法。
1. A method for fixing an optical fiber by providing a box for arranging the optical fiber in a part of a structure, arranging the optical fiber in the box, and potting a resin having a relatively small Young's modulus to fix the optical fiber. A method for fixing an optical fiber, characterized in that a resin having a Young's modulus larger than that of the potting resin is re-potted on the surface of the potting resin in which the fiber is completely embedded to perform two-layer potting.
【請求項2】構造体の一部に光ファイバを配置する箱を
設け、その内部に光ファイバを配置し、比較的ヤング率
の小さい樹脂をポッティングすることにより光ファイバ
を固定する方法において、光ファイバを完全に埋設した
該ポッティング樹脂表面に該ポッティング樹脂とは材質
の異なるフィルムを張り付けることを特徴とする光ファ
イバの固定方法。
2. A method of fixing an optical fiber by providing a box for arranging the optical fiber in a part of a structure, arranging the optical fiber in the box, and potting a resin having a relatively small Young's modulus to fix the optical fiber. A method of fixing an optical fiber, characterized in that a film made of a material different from that of the potting resin is attached to a surface of the potting resin in which the fiber is completely embedded.
JP4071332A 1992-03-27 1992-03-27 Method for fixing optical fiber Pending JPH05273415A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4071332A JPH05273415A (en) 1992-03-27 1992-03-27 Method for fixing optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4071332A JPH05273415A (en) 1992-03-27 1992-03-27 Method for fixing optical fiber

Publications (1)

Publication Number Publication Date
JPH05273415A true JPH05273415A (en) 1993-10-22

Family

ID=13457475

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4071332A Pending JPH05273415A (en) 1992-03-27 1992-03-27 Method for fixing optical fiber

Country Status (1)

Country Link
JP (1) JPH05273415A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0660082A1 (en) * 1993-12-27 1995-06-28 Andrew A.G. Coil mounting arrangement for fiber optic gyroscope
US5444534A (en) * 1993-12-27 1995-08-22 Andrew Corporation Coil mounting arrangement for fiber optic gyroscope
JPH0814918A (en) * 1994-07-04 1996-01-19 Litton Syst Inc Pot-shaped optical fiber gyro sensor coil
JPH0861962A (en) * 1994-08-10 1996-03-08 Litton Syst Inc Sensor coil for low-bias optical fiber gyroscope
WO2007005068A1 (en) * 2005-06-30 2007-01-11 Corning Cable Systems Llc Methods and apparatus for optical splitter modules and splitter module housings
WO2013186852A1 (en) * 2012-06-12 2013-12-19 東京計器株式会社 Sensing coil for fiber optic gyroscopes and manufacturing method for same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0660082A1 (en) * 1993-12-27 1995-06-28 Andrew A.G. Coil mounting arrangement for fiber optic gyroscope
US5444534A (en) * 1993-12-27 1995-08-22 Andrew Corporation Coil mounting arrangement for fiber optic gyroscope
US5481358A (en) * 1993-12-27 1996-01-02 Andrew Corporation Coil mounting arrangement for fiber optic gyroscope using a gel loaded with particles
JPH0814918A (en) * 1994-07-04 1996-01-19 Litton Syst Inc Pot-shaped optical fiber gyro sensor coil
JPH0861962A (en) * 1994-08-10 1996-03-08 Litton Syst Inc Sensor coil for low-bias optical fiber gyroscope
WO2007005068A1 (en) * 2005-06-30 2007-01-11 Corning Cable Systems Llc Methods and apparatus for optical splitter modules and splitter module housings
WO2013186852A1 (en) * 2012-06-12 2013-12-19 東京計器株式会社 Sensing coil for fiber optic gyroscopes and manufacturing method for same
CN104380042A (en) * 2012-06-12 2015-02-25 东京计器株式会社 Sensing coil for fiber optic gyroscopes and manufacturing method for same
US9541400B2 (en) 2012-06-12 2017-01-10 Tokyo Keiki Inc. Fiber optic gyroscope sensing coil and method of fabricating the same

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