JP2003302256A - Optical fiber sensor - Google Patents
Optical fiber sensorInfo
- Publication number
- JP2003302256A JP2003302256A JP2002105901A JP2002105901A JP2003302256A JP 2003302256 A JP2003302256 A JP 2003302256A JP 2002105901 A JP2002105901 A JP 2002105901A JP 2002105901 A JP2002105901 A JP 2002105901A JP 2003302256 A JP2003302256 A JP 2003302256A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- fiber sensor
- coating layer
- metal plate
- fixed
- 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 title claims abstract description 62
- 229920005989 resin Polymers 0.000 claims abstract description 35
- 239000011347 resin Substances 0.000 claims abstract description 35
- 239000000853 adhesive Substances 0.000 claims abstract description 21
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 239000011247 coating layer Substances 0.000 claims description 33
- 230000001070 adhesive effect Effects 0.000 claims description 18
- 229920001187 thermosetting polymer Polymers 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 21
- 229910052751 metal Inorganic materials 0.000 abstract description 21
- 238000002788 crimping Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 102100036738 Guanine nucleotide-binding protein subunit alpha-11 Human genes 0.000 description 1
- 101100283445 Homo sapiens GNA11 gene Proteins 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、光信号を利用し
て、被検出体の歪や温度等を検出するための光ファイバ
センサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber sensor for detecting strain, temperature, etc. of an object to be detected using an optical signal.
【０００２】[0002]
【従来の技術】近年光ファイバを用いたセンシング技術
が発達し、この中で様々なセンサ用光デバイスが開発さ
れてきている。この光デバイスの一種に光ファイバのコ
アの長手方向の一部に紫外線等を照射して屈折率を部分
的に変化させたいわゆるブラッグ・グレーティングを書
き込んだ光ファイバセンサがある。このような光ファイ
バセンサはブラッグ・グレーティング部分で反射して戻
ってくる光信号を分析して被検出体の変化状況を検出す
るものであるが、従来のこの種の光ファイバセンサは一
次被覆層としてヤング率０．５〜１０ＭＰａ、伸び１０
０〜３００％、二次被覆層としてヤング率１００〜１０
００ＭＰａ、伸び１０〜６０％の紫外線硬化型樹脂や熱
硬化型樹脂を被覆して用いていた。なお、二次被覆層ま
でを含めた外径は２００〜６００μｍである。2. Description of the Related Art In recent years, a sensing technique using an optical fiber has been developed, and various optical devices for sensors have been developed therein. One type of this optical device is an optical fiber sensor in which a so-called Bragg grating in which a part of the optical fiber core in the longitudinal direction is irradiated with ultraviolet rays or the like to partially change the refractive index is written. Such an optical fiber sensor detects the change state of the object to be detected by analyzing the optical signal reflected and returned by the Bragg grating portion, but the conventional optical fiber sensor of this type has a primary coating layer. Young's modulus of 0.5 to 10 MPa and elongation of 10
0-300%, Young's modulus 100-10 as secondary coating layer
An ultraviolet curable resin or a thermosetting resin having 00 MPa and an elongation of 10 to 60% was coated and used. The outer diameter including the secondary coating layer is 200 to 600 μm.
【０００３】上記のような光ファイバセンサにより被検
出体の変化状況を調べる場合、光ファイバセンサと被検
出体とを固定しなければならない。具体的には、例えば
被検出体として橋梁部分の歪を検出する場合、従来は図
５に示すようにブラッグ・グレーティング部５１を有す
る光ファイバセンサ５２と被検出体５３との固定には、
被検出体固定部分として鉄等からなる金属板５４に二次
被覆層５５の上から接着剤５６で固定し光ファイバセン
サ５２を固定し、その金属板５４を橋梁等の被検出体５
３に溶接等により固定する手段を用いていた。なお、ブ
ラッグ・グレーティング部５１は一次被覆層、二次被覆
層を除去してから光ファイバのコアに紫外線等を照射し
てブラッグ・グレーティングを書き込み、その後樹脂を
再被覆して構成する。When investigating the change state of the object to be detected by the optical fiber sensor as described above, the optical fiber sensor and the object to be detected must be fixed. Specifically, for example, in the case of detecting the strain of the bridge portion as the detected object, conventionally, as shown in FIG. 5, to fix the optical fiber sensor 52 having the Bragg grating portion 51 and the detected object 53,
The optical fiber sensor 52 is fixed to the metal plate 54 made of iron or the like as the detection object fixing portion from above the secondary coating layer 55 with the adhesive 56, and the metal plate 54 is fixed to the detection object 5 such as a bridge.
3 was fixed by welding or the like. The Bragg grating portion 51 is formed by removing the primary coating layer and the secondary coating layer, irradiating the core of the optical fiber with ultraviolet rays or the like to write the Bragg grating, and then recoating the resin.
【０００４】[0004]
【発明が解決しようとする課題】ところで、上記のよう
な従来の技術には、次のような解決すべき課題があっ
た。即ち、従来は光ファイバセンサと被検出体との固定
には、被検出体固定部分として鉄等からなる金属板に二
次被覆層の上から接着剤で光ファイバを固定して光ファ
イバセンサとし、その金属板を橋梁等の被検出体に固定
していた。このような固定方法では長時間の間に被検出
体が伸長、圧縮を繰り返すと、柔らかい一次被覆層とフ
ァイバの間が剥離を起こし、それが二次被覆層と接着剤
との間の剥離につながり、結局経時的な変動により接着
部分の強度が劣化して長期的な検出ができないという不
都合が生じる場合があった。また、接着剤の接着強度を
高めて二次被覆層と接着剤の固定強度を高くする方法も
あるが接着剤のコストが高くなるという問題があった。By the way, the above conventional techniques have the following problems to be solved. That is, conventionally, for fixing an optical fiber sensor and an object to be detected, an optical fiber sensor is fixed as an object to be detected by fixing an optical fiber from above the secondary coating layer on a metal plate made of iron or the like to form an optical fiber sensor. , The metal plate was fixed to the object to be detected such as a bridge. In such a fixing method, when the detected object repeatedly extends and compresses for a long time, peeling occurs between the soft primary coating layer and the fiber, which causes peeling between the secondary coating layer and the adhesive. In some cases, the strength of the bonded portion deteriorates due to the variation over time, and the long-term detection cannot be performed. There is also a method of increasing the adhesive strength of the adhesive to increase the fixing strength between the secondary coating layer and the adhesive, but there is a problem that the cost of the adhesive increases.
【０００５】本発明は光ファイバセンサと被検出体固定
部分である金属板との間の固定強度が強く、長期間に亘
ってセンシング可能な光ファイバセンサを提供するもの
である。The present invention provides an optical fiber sensor which has a strong fixing strength between an optical fiber sensor and a metal plate which is a fixed part of an object to be detected and which is capable of sensing for a long period of time.
【０００６】[0006]
【課題を解決するための手段】本発明は以上の点を解決
するため次の構成を採用する。
〈構成１〉コアとクラッドからなる光ファイバの前記コ
ア中の長手方向の一部に書き込まれたブラッグ・グレー
ティングを利用して、当該光ファイバを固定した被検出
体の変化状況を、当該光ファイバ中を伝送される光信号
により検出する光ファイバセンサであって、上記光ファ
イバセンサは上記クラッドの外周に非剥離性樹脂からな
る被覆層を有し、上記非剥離性樹脂からなる被覆層と被
検出体固定部分が固定手段により固定されていることを
特徴とする光ファイバセンサ。The present invention adopts the following constitution in order to solve the above points. <Structure 1> Using a Bragg grating written in a part of the optical fiber consisting of a core and a clad in the core in the longitudinal direction, the change state of the detection object to which the optical fiber is fixed is detected. An optical fiber sensor for detecting by an optical signal transmitted through the optical fiber sensor, wherein the optical fiber sensor has a coating layer made of a non-peeling resin on an outer periphery of the clad, and a coating layer made of the non-peeling resin and a covering layer. An optical fiber sensor, wherein a detection body fixing portion is fixed by a fixing means.
【０００７】〈構成２〉上記非剥離性樹脂からなる被覆
層はヤング率５００〜２５００ＭＰａ、伸び５〜２０％
の紫外線硬化型樹脂若しくは熱硬化型樹脂からなること
を特徴とする構成１記載の光ファイバセンサ。<Structure 2> The coating layer made of the non-peelable resin has a Young's modulus of 500 to 2500 MPa and an elongation of 5 to 20%.
2. The optical fiber sensor according to Structure 1, which is made of the ultraviolet curable resin or the thermosetting resin.
【０００８】〈構成３〉上記非剥離性樹脂からなる被覆
層は厚さが１〜１０μｍであることを特徴とする構成１
または構成２記載の光ファイバセンサ。<Structure 3> The structure 1 is characterized in that the coating layer made of the non-peelable resin has a thickness of 1 to 10 μm.
Alternatively, the optical fiber sensor according to the configuration 2.
【０００９】〈構成４〉上記固定手段は接着剤を用いる
ことを特徴とする構成１から構成３までのいずれかの構
成に記載の光ファイバセンサ。<Structure 4> The optical fiber sensor according to any one of Structures 1 to 3, wherein the fixing means uses an adhesive.
【００１０】〈構成５〉上記固定手段は機械的手段を用
いることを特徴とする構成１から構成３までのいずれか
の構成に記載の光ファイバセンサ。<Structure 5> The optical fiber sensor according to any one of Structures 1 to 3, wherein the fixing means is a mechanical means.
【００１１】[0011]
【発明の実施の形態】以下、本発明の実施の形態につい
て具体例を用いて説明する。なお、これから説明する各
図において同一個所は同一番号で表すこととする。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to specific examples. In addition, in each of the drawings to be described below, the same parts are represented by the same numbers.
【００１２】図１は本発明の一実施例である光ファイバ
センサを構成している光ファイバの断面図を表した図で
ある。図１において、光ファイバは長手方向の一部にブ
ラッグ・グレーティングが書き込まれているコア１とそ
の周囲のクラッド２と、クラッド２の外周に被覆された
厚さが１〜１０μｍの非剥離性の樹脂被覆層３及びさら
にその外周に被覆された樹脂被覆層４からなっている。
最外層の樹脂被覆層４の外径は２００〜６００μｍであ
る。非剥離性の樹脂被覆層３はヤング率が５００〜２５
００ＭＰａ、伸びが５〜２０％の高強度の紫外線硬化型
樹脂若しくは熱硬化型樹脂からなり、クラッドの石英ガ
ラスと密着しており、容易に剥離しない構造になってい
る。FIG. 1 is a diagram showing a cross-sectional view of an optical fiber constituting an optical fiber sensor according to an embodiment of the present invention. In FIG. 1, an optical fiber has a core 1 in which a Bragg grating is written in a part in the longitudinal direction, a clad 2 around the core 1, and a non-peelable layer with a thickness of 1 to 10 μm coated on the outer circumference of the clad 2. It is composed of a resin coating layer 3 and a resin coating layer 4 coated on the outer periphery thereof.
The outer diameter of the outermost resin coating layer 4 is 200 to 600 μm. The non-peelable resin coating layer 3 has a Young's modulus of 500 to 25.
It is made of a high-strength UV-curable resin or thermosetting resin having a pressure of 00 MPa and an elongation of 5 to 20%, and is in close contact with the quartz glass of the clad so that it does not easily peel off.
【００１３】図２は本発明の光ファイバセンサを表した
図であり、光ファイバのコアの長手方向の一部にブラッ
グ・グレーティングが書き込まれたブラッグ・グレーテ
ィング部５を有し、鉄等からなる金属板６と接着剤７に
より固定されている。この時前記光ファイバと金属板と
の固定部は最外層の樹脂被覆層４を３０ｍｍ以上除去し
て非剥離性の樹脂被覆層３を露出させ、この非剥離性樹
脂被覆層３と金属板６とを接着剤７により固定してい
る。そして金属板６と橋梁等の被検出体８とを溶接等に
より固定する。FIG. 2 is a diagram showing an optical fiber sensor of the present invention, which has a Bragg grating portion 5 in which a Bragg grating is written in a part of the optical fiber core in the longitudinal direction, and is made of iron or the like. It is fixed by a metal plate 6 and an adhesive 7. At this time, in the fixing portion between the optical fiber and the metal plate, the resin coating layer 4 of the outermost layer is removed by 30 mm or more to expose the non-peeling resin coating layer 3, and the non-peeling resin coating layer 3 and the metal plate 6 And are fixed by an adhesive 7. Then, the metal plate 6 and the detected object 8 such as a bridge are fixed by welding or the like.
【００１４】上記のようにして構成された光ファイバセ
ンサを橋梁等の被検出体に取り付け固定して歪等を測定
すると、図３に示すように光ファイバセンサに引張力が
加わると基準の光信号の波長（この場合１５５０ｎｍ）
が長波長側に移動する。一方、光ファイバに圧縮力が加
わると反対に光信号の波長は短波長側に移動する。従っ
て、この光信号を分析してどのような力がどの程度被検
出体に加わったかを知ることができる。When the optical fiber sensor constructed as described above is attached and fixed to the object to be detected such as a bridge to measure the strain and the like, when a tensile force is applied to the optical fiber sensor as shown in FIG. Signal wavelength (1550 nm in this case)
Moves to the long wavelength side. On the other hand, when a compressive force is applied to the optical fiber, on the contrary, the wavelength of the optical signal moves to the short wavelength side. Therefore, by analyzing this optical signal, it is possible to know what force and how much force is applied to the detected object.
【００１５】このようにすると、高強度の非剥離性樹脂
被覆層３と金属板６とが強固に固定されるために長期的
な使用によっても接着剤の剥離が見られず、安定した状
態で歪等の検出が可能となる。なお、本出願人の実験に
よれば従来の方法で固定した光ファイバセンサの固定部
分の引張強度は１０Ｎ（ニュートン）であったのに対
し、本実施例の場合は５０Ｎと極めて高い値を示し、優
れた固定強度を有していることがわかった。In this case, since the high-strength non-peelable resin coating layer 3 and the metal plate 6 are firmly fixed to each other, no peeling of the adhesive is observed even after long-term use, and the adhesive is kept stable. It is possible to detect distortion and the like. According to the experiment by the applicant, the tensile strength of the fixed portion of the optical fiber sensor fixed by the conventional method was 10 N (Newton), whereas in the case of the present embodiment, it shows an extremely high value of 50 N. , And found to have excellent fixing strength.
【００１６】また、非剥離性樹脂被覆層３と金属板６と
の固定部分を接着剤を用いないで機械的手段により固定
する方法もある。この場合、例えば図４に示すように光
ファイバの非剥離性樹脂被覆層３と金属板６とを薄いか
しめ用金属板９で挟み、工具によりかしめて固定する。
このようにすると接着剤を用いていないため接着剤の経
時的変化を受けることもなく、より安定して固定するこ
とができる。There is also a method of fixing the fixed portion between the non-peelable resin coating layer 3 and the metal plate 6 by mechanical means without using an adhesive. In this case, for example, as shown in FIG. 4, the non-peelable resin coating layer 3 of the optical fiber and the metal plate 6 are sandwiched by a thin caulking metal plate 9 and caulked by a tool to be fixed.
In this case, since the adhesive is not used, the adhesive can be more stably fixed without being affected by the change with time.
【００１７】なお、接着剤を用いないかしめ法による本
実施の形態において、非剥離性樹脂被覆層３と金属板６
との固定部分の張力を１５個の試料について測定したと
ころ、最大値１１．８５Ｎ（ニュートン）、最小値９．
１８Ｎ、平均値１０．７２Ｎであったが、従来の光ファ
イバを用いて紫外線硬化型樹脂被覆層の上からかしめた
場合にはやはり１５個の試料について最大値９．２５
Ｎ、最小値５．４３Ｎ、平均値７．８８Ｎであった。従
って、本発明ではばらつきが少なく優れた固定強度を有
していることがわかった。In the present embodiment by the crimping method without using an adhesive, the non-peeling resin coating layer 3 and the metal plate 6 are used.
When the tensions of the fixed portions of and were measured for 15 samples, the maximum value was 11.85 N (Newton) and the minimum value was 9.85 N.
The average value was 18N and the average value was 10.72N. However, when the conventional optical fiber was used to crimp the UV-curable resin coating layer, the maximum value was 9.25 for 15 samples.
N, the minimum value was 5.43N, and the average value was 7.88N. Therefore, it was found that the present invention has excellent fixing strength with little variation.
【００１８】[0018]
【発明の効果】上記したように本発明の光ファイバセン
サによれば、クラッドの外周に設けた非剥離性樹脂被覆
層と金属板とを固定して光ファイバセンサを構成したの
で、長期的に安定して歪等を検出することができる。固
定には接着剤を用いるほかかしめ等の機械的手段を用い
ることもできる。As described above, according to the optical fiber sensor of the present invention, the non-peeling resin coating layer provided on the outer periphery of the clad and the metal plate are fixed to form the optical fiber sensor. It is possible to stably detect distortion and the like. In addition to using an adhesive, mechanical means such as caulking can be used for fixing.
【図１】本発明の一実施例である光ファイバセンサを構
成している光ファイバの断面図を表した図である。FIG. 1 is a diagram showing a cross-sectional view of an optical fiber forming an optical fiber sensor according to an embodiment of the present invention.
【図２】本発明の光ファイバセンサの一実施例を表した
図である。FIG. 2 is a diagram showing an embodiment of an optical fiber sensor of the present invention.
【図３】波長と歪の状況を表した図である。FIG. 3 is a diagram showing a situation of wavelength and distortion.
【図４】本発明の光ファイバの他の実施例を表した図で
ある。FIG. 4 is a diagram showing another embodiment of the optical fiber of the present invention.
【図５】従来の光ファイバセンサを表した図である。FIG. 5 is a diagram showing a conventional optical fiber sensor.
１ コア ２ クラッド ３ 非剥離性樹脂被覆層 ４ 樹脂被覆層 ５ ブラッグ・グレーティング部 ６ 金属板 ７ 接着剤 ８ 被検出体 ９ かしめ用金属板 1 core 2 clad 3 Non-peelable resin coating layer 4 Resin coating layer 5 Bragg grating part 6 metal plate 7 adhesive 8 Object to be detected 9 Metal plate for caulking
───────────────────────────────────────────────────── フロントページの続き (72)発明者 白石 恵子 神奈川県川崎市川崎区小田栄２丁目１番１ 号 昭和電線電纜株式会社内 (72)発明者 松浦 宏司 神奈川県川崎市川崎区小田栄２丁目１番１ 号 昭和電線電纜株式会社内 Ｆターム(参考） 2F056 VF03 VF09 2F065 AA65 CC14 FF48 GG22 LL02 LL42 PP01 2F103 BA04 CA04 CA07 EC09 GA11 GA15 2G086 DD04 DD05 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Keiko Shiraishi 2-1-1 Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa No. Showa Densen Denki Co., Ltd. (72) Inventor Koji Matsuura 2-1-1 Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa No. Showa Densen Denki Co., Ltd. F term (reference) 2F056 VF03 VF09 2F065 AA65 CC14 FF48 GG22 LL02 LL42 PP01 2F103 BA04 CA04 CA07 EC09 GA11 GA15 2G086 DD04 DD05
Claims (5)
記コア中の長手方向の一部に書き込まれたブラッグ・グ
レーティングを利用して、当該光ファイバを固定した被
検出体の変化状況を、当該光ファイバ中を伝送される光
信号により検出する光ファイバセンサであって、前記光
ファイバセンサは前記クラッドの外周に非剥離性樹脂か
らなる被覆層を有し、前記非剥離性樹脂からなる被覆層
と被検出体固定部分が固定手段により固定されているこ
とを特徴とする光ファイバセンサ。1. A Bragg grating, which is written in a part of the optical fiber consisting of a core and a clad in the longitudinal direction of the core, is used to detect the change status of a detected object to which the optical fiber is fixed. An optical fiber sensor for detecting an optical signal transmitted through a fiber, wherein the optical fiber sensor has a coating layer made of a non-peeling resin on an outer periphery of the clad, and a coating layer made of the non-peeling resin. An optical fiber sensor characterized in that a fixed part of an object to be detected is fixed by a fixing means.
グ率５００〜２５００ＭＰａ、伸び５〜２０％の紫外線
硬化型樹脂若しくは熱硬化型樹脂からなることを特徴と
する請求項１記載の光ファイバセンサ。2. The optical fiber according to claim 1, wherein the coating layer made of the non-peelable resin is made of an ultraviolet curable resin or a thermosetting resin having a Young's modulus of 500 to 2500 MPa and an elongation of 5 to 20%. Sensor.
が１〜１０μｍであることを特徴とする請求項１または
請求項２記載の光ファイバセンサ。3. The optical fiber sensor according to claim 1, wherein the coating layer made of the non-peeling resin has a thickness of 1 to 10 μm.
徴とする請求項１から請求項３までのいずれかの請求項
に記載の光ファイバセンサ。4. The optical fiber sensor according to any one of claims 1 to 3, wherein the fixing means uses an adhesive.
を特徴とする請求項１から請求項３までのいずれかの請
求項に記載の光ファイバセンサ。5. The optical fiber sensor according to any one of claims 1 to 3, wherein the fixing means uses a mechanical means.
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| JP2002105901A JP2003302256A (en) | 2002-04-09 | 2002-04-09 | Optical fiber sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002105901A JP2003302256A (en) | 2002-04-09 | 2002-04-09 | Optical fiber sensor |
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| Publication Number | Publication Date |
|---|---|
| JP2003302256A true JP2003302256A (en) | 2003-10-24 |
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|---|---|---|---|
| JP2002105901A Pending JP2003302256A (en) | 2002-04-09 | 2002-04-09 | Optical fiber sensor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100394144C (en) * | 2005-06-17 | 2008-06-11 | 哈尔滨工业大学 | Optical fiber resin current detection sensing unit |
| JP2009204494A (en) * | 2008-02-28 | 2009-09-10 | Anritsu Corp | Vibration detector |
| CN101806584A (en) * | 2010-04-20 | 2010-08-18 | 中国计量学院 | Double-layer arched micro-strain sensor |
| JP4977810B1 (en) * | 2009-04-22 | 2012-07-18 | ホッティンガー バルトヴィン メッセテヒニーク ゲーエムベーハー | Optical strain measurement device with fiber Bragg grating |
| CN104359598A (en) * | 2014-10-11 | 2015-02-18 | 扬州市润特光电科技有限公司 | FBG (fiber bragg grating) based pressure sensor and application thereof |
| JP2015194369A (en) * | 2014-03-31 | 2015-11-05 | 株式会社熊谷組 | optical fiber sensor |
-
2002
- 2002-04-09 JP JP2002105901A patent/JP2003302256A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100394144C (en) * | 2005-06-17 | 2008-06-11 | 哈尔滨工业大学 | Optical fiber resin current detection sensing unit |
| JP2009204494A (en) * | 2008-02-28 | 2009-09-10 | Anritsu Corp | Vibration detector |
| JP4977810B1 (en) * | 2009-04-22 | 2012-07-18 | ホッティンガー バルトヴィン メッセテヒニーク ゲーエムベーハー | Optical strain measurement device with fiber Bragg grating |
| CN101806584A (en) * | 2010-04-20 | 2010-08-18 | 中国计量学院 | Double-layer arched micro-strain sensor |
| JP2015194369A (en) * | 2014-03-31 | 2015-11-05 | 株式会社熊谷組 | optical fiber sensor |
| CN104359598A (en) * | 2014-10-11 | 2015-02-18 | 扬州市润特光电科技有限公司 | FBG (fiber bragg grating) based pressure sensor and application thereof |
| CN104359598B (en) * | 2014-10-11 | 2016-08-31 | 扬州市润特光电科技有限公司 | A kind of pressure transducer based on fiber grating and application thereof |
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