KR100846163B1 - A optical fiber is sensor - Google Patents

A optical fiber is sensor Download PDF

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Publication number
KR100846163B1
KR100846163B1 KR1020060081669A KR20060081669A KR100846163B1 KR 100846163 B1 KR100846163 B1 KR 100846163B1 KR 1020060081669 A KR1020060081669 A KR 1020060081669A KR 20060081669 A KR20060081669 A KR 20060081669A KR 100846163 B1 KR100846163 B1 KR 100846163B1
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South Korea
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optical fiber
strain
present
fiber sensor
fixing
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KR1020060081669A
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Korean (ko)
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KR20080019393A (en
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성광기
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주식회사 여의시스템
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
    • G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Optical Transform (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

가. 청구범위에 기재된 발명이 속하는 기술분야.end. The technical field to which the invention described in the claims belongs.

본 발명은 인장이나 압축을 받는 구조물의 변형율을 계측하기 위하여 구조물표면에 광섬유 센서를 직접 부착할 경우에 시간의 경과 또는 진동에 따라 발생되는 파손이나 분리 침수 등의 위험을 제거토록 하고, 지속적이고 안전하게 사용할 수 있도록 되는 베어 광섬유센서의 보호를 위한 고정대에 관한 것이다.The present invention eliminates the risk of breakage or sedimentation caused by the passage of time or vibration when the optical fiber sensor is directly attached to the structure surface in order to measure the strain of a structure subjected to tension or compression, and continuously and safely. The present invention relates to a holder for protecting a bare fiber optic sensor that can be used.

나. 발명이 해결하려는 기술적 과제I. The technical problem to be solved by the invention

종래 이러한 형태로 사용되는 고정대는 분리형 또는 일체형이 사용되어지고 있으나 이러한 것들은 모두 베어광섬유센서가 자유로운 상태에 있지 못하기 때문에 궂물의 인장이나 압축시 베어광섬유센서의 변형율을 직접 계측하지 못하고 일체형이거나 또는 분리형의 고정대의 변형율을 계측하게 함으로 정확한 구조물의 측정이 곤란하다는 단점이 있는 것이다.Conventionally, the fixed type used in this form is a separate type or an integrated type, but since these are not all in the free state of the bare optical fiber sensor, they cannot be directly measured or measured the strain of the bare optical fiber sensor during tension or compression. It is difficult to accurately measure the structure by measuring the strain of the stator of the.

다. 본 발명의 해결방법 요지All. Solution summary of the present invention

따라서 본 발명은 베어광 섬유센서가 고정대에서 자유로운 상태에 위치토록 함으로서 구조물의 변형율만을 계측할 수 있도록 한 것이다.Therefore, the present invention is to be able to measure only the strain of the structure by placing the bare optical fiber sensor in the free state in the stator.

라. 발명의 중요한 용도.la. Important use of the invention.

구조물의 인장 압축변형율의 계측       Measurement of Tensile Compression Strain of Structures

Description

구조물의 인장 압축변형율의 계측용 광섬유센서의 고정대{A optical fiber is sensor}Fixture of optical fiber sensor for measuring tensile compressive strain of structure {A optical fiber is sensor}

도 1은 본 발명의 고정대에 보호관이 조립되어진 상태의 외관사시도.1 is a perspective view of a state in which the protection tube is assembled to the holder of the present invention.

도 2는 본 발명의 고정대의 외관사시도.Figure 2 is an external perspective view of the fixing rod of the present invention.

도 3은 본 발명이 구조물에 부착되기 이전의 상태를 도시한 사시도.3 is a perspective view showing a state before the present invention is attached to a structure.

도 4는 본 발명의 고정부에 보호관이 유동가능하게 위치된 상태의 사시도.Figure 4 is a perspective view of a state in which the protective tube is flowably positioned in the fixing portion of the present invention.

도 5는 본 발명의 광섬유센서의 개략적인 구조도.5 is a schematic structural diagram of an optical fiber sensor of the present invention.

도 6은 본 발명의 보호관이 실리콘피복층으로 피복된 상태도.6 is a state in which the protective tube of the present invention is coated with a silicon coating layer.

도 7은 종래 분리형의 고정대의 조립도.Figure 7 is an assembly view of a conventional detachable type of fixture.

도 8은 종래 일체형의 조립도.Figure 8 is an assembled view of a conventional one-piece.

<도면의주요부분에대한부호의설명>  Explanation of symbols on the main parts of the drawing

10 : 고정대 11 : 가이드장착홈10: holder 11: guide mounting groove

12,12a : 맞물림턱 13,13a : 안착홈12,12a: Engagement jaw 13,13a: Seating groove

14 : 덮개 15 : 고정부       14 cover 15 fixing part

16 : 장착홀 17 : 완충부16 mounting hole 17 buffer part

18 : 홈부 19 : 조임나사       18: groove 19: tightening screw

20 : 보호관 21 : 내입홈20: protection officer 21: in-home

22 : 안착돌기 23 : 커버22: seating protrusions 23: cover

30 : 가이드 31 : 실리콘 피복층30: guide 31: silicon coating layer

본 발명은 인장이나 압축을 받는 구조물의 변형율을 계측하기 위하여 구조물표면에 베어(Bare)광 섬유 센서(FRG)를 부착할 경우에 시간의 경과 또는 진동에 따라 발생되는 파손이나 분리 침수 등의 위험을 제거토록 하고, 지속적이고 안전하게 사용할 수 있도록 되는 베어 광섬유센서의 보호를 위한 고정대에 관한 것이다.In the present invention, when a bare optical fiber sensor (FRG) is attached to the surface of a structure in order to measure the strain of a structure subjected to tension or compression, it is possible to reduce the risk of breakage or separation immersion caused by time or vibration. The present invention relates to a holder for protection of a bare fiber optic sensor to be removed and to be used continuously and safely.

종래 이러한 형태로 사용되는 고정대는 베어 광섬유센서의 보호를 위한 보호관이 구조물에 장착되어지는 고정부에 조임볼트 등에 의하여 고정되게 조립되어지는 분리형 또는 보호관이 고정부에 일체로 형성되어지는 일체형이 사용되어지고 있다.Conventionally used in this form is a fixed type that is assembled to be fixed by a fastening bolt, etc. or a fixed tube to the protection tube is mounted to the structure for the protection of the bare fiber optic sensor is used integrally formed integrally with the fixing unit ought.

또한 상기 고정대의 보호관에는 베어 광섬유 센서가 접착제 등에 의하여 고정된 상태에 있고. 그 상태에서 고정대의 고정부에는 베어 광 섬유 센서의 콘넥터가 고정되어진 상태이다.In addition, the bare tube sensor is fixed to the protection tube of the stator by an adhesive or the like. In this state, the connector of the bare optical fiber sensor is fixed to the fixing part of the fixing stand.

이러한 상태에서 광섬유의 빛의 굴절되어지는 상태를 감지함으로서 구조물의 인장이나 압축 등에 의한 변형율을 계측하게 되는 것이다.In this state, by detecting the refracted state of the light of the optical fiber is to measure the strain due to the tension or compression of the structure.

그러나 상기한 종래의 것들은 모두 베어 광 섬유센서가 보호관에 고정된 상 태에서 구조물에 장착되는 고정부에 고정되게 형성됨으로 자유로운 상태에 있지 못하기 때문에 구조물의 인장이나 압축시 베어 광 섬유센서의 변형율을 직접 계측하지 못하고 고정대의 변형율도 계측하게 함으로 정확한 구조물의 측정이 곤란하다는 단점이 있는 것이다.However, all of the above-described conventional ones are not fixed because the bare optical fiber sensor is fixed to the fixing part mounted on the structure in the state of being fixed to the protective tube, so that the strain of the bare optical fiber sensor during tensioning or compression of the structure is reduced. It is difficult to measure the exact structure by measuring the strain of the stator without direct measurement.

따라서 본 발명은 베어 광 섬유센서가 고정대에서 자유로운 상태에 위치토록 함으로서 구조물의 변형율만을 계측할 수 있도록 한 것이다.Therefore, the present invention is to be able to measure only the strain of the structure by placing the bare optical fiber sensor in the free state in the stator.

이하 첨부도면에 의거 상세하게 설명하면 다음과 같다.Hereinafter will be described in detail based on the accompanying drawings.

우선 본 발명의 구조는 베어 광 섬유가 장착되는 보호관과 상기 보호관을 유동가능하게 수용토록 하는 고정부로 이루어지는 고정대로 구성된다.First, the structure of the present invention is composed of a fixture consisting of a protective tube to which the bare optical fiber is mounted and a fixing part to receive the protective tube in a flowable manner.

이때 고정대에는 보호관이 일정간격의 유동이 자유롭게 되는 것이고, 별도의 완충부를 고정부와 일체로 형성토록 함으로서 고정대 자체의 변형율에 대한 완충이 이루어지도록 함으로서 베어 광 섬유 센서에의 변형을 방지토록 하고, 이러한 보호관의 기밀유지를 위하여는 보호관의 내입홈에 내입되어진 광섬유를 커버에 의하여 덮어 이탈이 방지토록 한 후 실리콘으로 보호관은 물론 보호관이 고정부의 안착홈에서 유동되어지는 안착홈의 입구를 동시에 피복토록 하여 피복층을 형성토록 함으로서 기밀유지와 동시에 실리콘의 탄성력에 의하여 보호관이 유동될 경우에 유동이 가능토록 한 것이다.In this case, the protection tube is free to flow at a certain interval, and by forming a separate buffer unit integrally with the fixing portion to prevent the deformation of the bare optical fiber sensor by buffering against the strain of the fixing unit itself, such a In order to maintain the confidentiality of the protective tube, cover the optical fiber in the inner groove of the protective tube with a cover to prevent the separation and then cover the entrance of the receiving groove where the protective tube as well as the protective tube flows from the fixing groove of the fixing part at the same time. By forming the coating layer, airtightness is maintained and at the same time the flow is possible when the protective tube is flowed by the elastic force of the silicon.

이하 첨부도면에 의거 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도1은 본 발명의 고정대의 조립구조를 나타낸 것으로, 본 발명의 고정대(10) 는 구조물에 장착되어지는 고정부(15)와 광섬유(40)가 장착되어지는 보호관(20) 및 상기 보호관(20)의 고정부(15)에 유동가능하게 고정하고 광섬유(40)의 컨넥터(43)의 고정을 위한 덮개(14)로 이루어지는 구성이다.Figure 1 shows the assembly structure of the fixture of the present invention, the fixture 10 of the present invention is a protection tube 20 and the protective tube 20 is mounted to the fixing portion 15 and the optical fiber 40 is mounted to the structure. The cover 14 is fixed to the fixing portion 15 of the () and flowable and for fixing the connector 43 of the optical fiber 40.

이때 베어 광 섬유(40)는 콘넥터(43)와 센서부(41)와 피복부(42)로 이루어지는 것이고, 센서부(41)가 노출되어진 상태에서 굴곡에 의한 빛의 굴절을 감지하게 되는 것이고, 이러한 부분은 이미 공지의 사실이다.At this time, the bare optical fiber 40 is composed of the connector 43, the sensor portion 41 and the covering portion 42, and the sensor portion 41 is to detect the refraction of the light due to bending in the exposed state, This part is already known.

또한 고정대(10)를 구성하는 고정부(15)는 덮개(14)로 결합되어지는 것이고, 덮개(14)와 고정부(15)에는 서로 대응되는 맞물림턱(12,12a)을 형성토록 함으로서 덮개(14)가 서로 바뀌지 않게 결합토록 되는 것이고, 또한 상기 고정부(15)에는 다수의 홈부(18)를 형성토록 하여 광섬유(40)의 피복부(42)의 단이진 부분이 수용토록 함으로서 덮개(14)를 고정부(15)와 조임나사(19)등으로 조임토록 할 경우에 가압에 의한 광섬유(40)의 손상을 방지토록 한 것이다.In addition, the fixing portion 15 constituting the fixing stand 10 is to be coupled to the cover 14, the cover 14 and the fixing portion 15 by forming the engaging jaw (12, 12a) corresponding to each other cover (14) is to be coupled so as not to change each other, and the fixing portion 15 to form a plurality of grooves (18) so that the end of the cover portion 42 of the optical fiber 40 to accommodate the cover ( 14) is to prevent damage to the optical fiber 40 by pressing when tightening the fixing portion 15 and the tightening screw (19).

또한 양단의 고정부(15)는 비대칭 노치의 형태로 제작되어진 완충부(17)가 일체로 형성되어 구조물에 고정되어지는 고정부(15)의 변형에 의한 길이방향으로의 완충이 이루어지게 되는 것이고, 이러한 완충에 의하여 보호관(20)은 고정부(15)의 안착홈(13)에 안착돌기(22)에 의하여 유동가능하게 안착된 상태를 갖게 되는 것이다.In addition, both ends of the fixing portion 15 is formed in the form of an asymmetric notch buffer unit 17 is formed integrally to be buffered in the longitudinal direction by the deformation of the fixing unit 15 is fixed to the structure By this buffer, the protective tube 20 is to have a state seated in the seating groove 13 of the fixing portion 15 so as to be flowable by the mounting projection (22).

이때 보호관(20)의 이탈방지를 위하여 덮여지는 덮개(14)에도 동시에 안착홈(13a)이 형성되어지는 것이다.At this time, the mounting groove 13a is formed at the same time on the cover 14 which is covered to prevent the detachment of the protective tube 20.

또한 이러한 상태에서 보호관(20)의 내입홈(21)에 내입되어진 광섬유(40)는 커버(23)에 의하여 이탈이 방지되어지도록 된 상태에서 실리콘에 의하여 피복되어지면서 실리콘은 보호관(20)이 안착홈(13,13a)에 내입되어진 상태에서 안착홈(13,13a)의 입구까지 실리콘피복층(31)을 형성하게 되는 것이다.In addition, in this state, the optical fiber 40 embedded in the inlet groove 21 of the protective tube 20 is coated by the silicon in a state in which the separation is prevented by the cover 23 while the silicone is seated on the protective tube 20. In the state in which the grooves 13 and 13a are embedded, the silicon coating layer 31 is formed up to the entrance of the mounting grooves 13 and 13a.

본 발명에서 피복층(31)의 구현을 위하여 실리콘으로 사용토록 한 것은 완충력 및 내화학성 및 내마모성이 우수하기 때문이고, 이러한 것이 본 발명의 목적을 제한하는 것이 아니다.The use of silicon for the implementation of the coating layer 31 in the present invention is because of excellent buffering capacity, chemical resistance and wear resistance, which does not limit the purpose of the present invention.

또한 양단의 고정부(15)의 측면으로는 가이드장착홈(11)이 형성되어 일정한 직립강도를 갖는 가이드(30)가 장착된 상태에서 고정부(15)가 완충부(17)에 의한 유연함으로 구부러짐이 발생되는 것을 방지하게 되고 그 상태에서 구조물에 장착한 이후에는 가이드(30)를 제거토록 하는 것이다.In addition, the guide mounting groove 11 is formed on the side of the fixing part 15 at both ends, so that the fixing part 15 is flexible by the buffer part 17 in a state in which the guide 30 having a constant upright strength is mounted. The bending is prevented from occurring and the guide 30 is removed after mounting to the structure in the state.

따라서 고정대(10) 자체의 변형은 완충부(17)에서 어느 정도 완충을 하게 되고 그 상태에서 보호관(20)의 내입홈(21)에 내입되어진 광섬유(40)는 자유로운 상태에 있기 때문에 고정대(10)의 변형에 아무런 영향을 받지 않게 됨으로 구조물 자체의 인장과 압축에 의한 변형율만을 정확하게 계측하게 되는 것이다.Therefore, the deformation of the stator 10 itself is buffered to some extent in the buffer unit 17, and in that state, the optical fiber 40 embedded in the indentation groove 21 of the protective tube 20 is in the free state. Because it is not affected by the deformation of), only the strain due to the tension and compression of the structure itself is accurately measured.

상술한 바와 같이 본 발명은 고정대 자체의 변형율에는 완충에 의하여 상쇄토록 되고 자유로운 상태에 있는 광섬유가 구조물의 인장과 압축 등에 의한 변형에만 반응을 하면서 정확한 계측이 가능하게 되는 것이다.As described above, in the present invention, the optical fiber in the free state is canceled by the buffer itself and reacts only to deformation due to tensile and compression of the structure, and thus accurate measurement is possible.

Claims (5)

한쌍의 고정부를 연결하는 고정대 위로 실리콘피복층으로 피복된 베어 광 섬유가 장착되는 보호관이 관끼움부에 끼워져 고정부에 고정설치되는 광섬유센서의 고정대에 있어서,In the holder of the optical fiber sensor in which a protective tube in which a bare optical fiber coated with a silicon coating layer is mounted on a holder for connecting a pair of fixing parts is fitted in the tube fitting part and is fixed to the fixing part. 상기 고정대(10)는 비대칭 노치형상의 완충부(17)가 고정부(15)와 일체로 형성되어 길이방향으로 완충역할을 수행하도록 하고 동시에 이 고정부(15)의 안착홈(13)에 안착돌기(22)를 가진 보호관(20)이 유격을 갖은 상태로 안착시켜 설치하고, 더불어 상기 보호관의 실리콘피복층이 안착홈 입구까지 연장되어짐을 특징으로 하는 구조물의 인장 압축 변형율의 계측용 광섬유센서의 고정대.The holder 10 is asymmetric notched buffer 17 is formed integrally with the fixing portion 15 to perform a buffer role in the longitudinal direction and at the same time seated in the seating groove 13 of the fixing portion 15 Fixing tube 20 having a protrusion 22 is installed to be seated in a state having a clearance, and the silicone coating layer of the protective tube extends to the entrance of the seating groove, the stator of the optical fiber sensor for measuring the tensile compressive strain of the structure, characterized in that . 삭제delete 삭제delete 삭제delete 삭제delete
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KR101684428B1 (en) 2015-06-03 2016-12-20 한국과학기술원 Multi-Directional Damage Detection System Embedded in Concrete And Method for Detecting Damage in Concrete Structure

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CN101943568B (en) * 2009-06-10 2012-06-27 香港纺织及成衣研发中心 Fiber strain sensor and measurement system for repeated large deformation

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KR20000074371A (en) * 1999-05-20 2000-12-15 강병호 Ribbon type optical sensor for measuring deformation of institution
JP2004212839A (en) * 2003-01-08 2004-07-29 Shodensha Co Ltd Mounting structure for optical cable terminal fixing table

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KR20000074371A (en) * 1999-05-20 2000-12-15 강병호 Ribbon type optical sensor for measuring deformation of institution
JP2004212839A (en) * 2003-01-08 2004-07-29 Shodensha Co Ltd Mounting structure for optical cable terminal fixing table

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101684428B1 (en) 2015-06-03 2016-12-20 한국과학기술원 Multi-Directional Damage Detection System Embedded in Concrete And Method for Detecting Damage in Concrete Structure

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