KR100935984B1 - Fbg strain sensor - Google Patents

Fbg strain sensor Download PDF

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KR100935984B1
KR100935984B1 KR1020070132904A KR20070132904A KR100935984B1 KR 100935984 B1 KR100935984 B1 KR 100935984B1 KR 1020070132904 A KR1020070132904 A KR 1020070132904A KR 20070132904 A KR20070132904 A KR 20070132904A KR 100935984 B1 KR100935984 B1 KR 100935984B1
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sensor
optical fiber
ball
fixing
fixing piece
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KR1020070132904A
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KR20090065558A (en
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이금석
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이금석
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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
    • 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
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
    • G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
    • G01L1/246—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using integrated gratings, e.g. Bragg gratings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/14—Determining imbalance

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

본 발명은 광섬유격자(FBG ; Fiber Bragg Grating ) 변형률센서에 관한 것으로, 더욱 상세하게는 초기 설정 값 유지 및 현장 설치 시 취급이 까다로운 광섬유격자센서를 누구나 손쉽게 이동 및 설치할 수 있게 하고, 상기 광섬유격자센서의 측정감도를 높이며 설치된 후에도 상기 광섬유격자센서를 안전하게 보호할 수 있도록 모듈화한 것이다.The present invention relates to a fiber bragg grating (FBG) strain sensor, and more particularly, to allow anyone to easily move and install a fiber optic lattice sensor that is difficult to handle during maintenance and initial installation, and the fiber lattice sensor Increasing the measuring sensitivity of the module will be modularized to protect the optical fiber grid sensor even after installation.

이를 위해 본 발명은, 선행기술 특허 등록번호 10-045416호의 광섬유격자센서용 고정구의 고정편과 고정판의 중간에 중앙이 원통형으로 관통되고 일 측면이 개방된 구조를 가지는 볼을 구비하여 고정편이 상하, 좌우, 전후 등의 3차원으로 이동가능한 기능을 부여하여 열악한 환경의 현장시공이 좀더 용이 해지도록 구성한 것을 특징으로 한다.To this end, the present invention, the fixing piece of the fixing member for the optical fiber grating sensor of the prior art Patent Registration No. 10-045416 has a ball having a structure in which the center penetrates in a cylindrical shape and one side is open, the fixing piece up and down, It is characterized in that it is configured to facilitate the construction of the field in a harsh environment by giving a function that can move in three dimensions, such as left and right, front and rear.

광섬유격자센서, FBG, FBG strain sensor Fiber Optic Grid Sensor, FBG, FBG Strain Sensor

Description

광섬유격자 변형률 센서 {FBG STRAIN SENSOR}Fiber Grating Strain Sensors {FBG STRAIN SENSOR}

본 발명은 높은 분해능과 우수한 신뢰성을 갖는 광섬유격자(FBG ; Fiber Bragg Grating ) 변형률센서에 관한 것으로, 더욱 상세하게는 초기 설정 값 유지 및 현장 설치 시 취급이 까다로운 광섬유격자센서를 누구나 손쉽게 이동 및 설치할 수 있게 하고, 상기 광섬유격자센서의 측정감도를 높이며 설치된 후에도 상기 광섬유격자센서를 안전하게 보호할 수 있도록 모듈화한 것이다.The present invention relates to a fiber Bragg Grating (FBG) strain sensor having high resolution and excellent reliability, and more particularly, anyone can easily move and install an optical fiber lattice sensor that is difficult to handle during maintenance and initial setting. In order to increase the measurement sensitivity of the optical fiber grating sensor, even after being installed, it is modularized to safely protect the optical fiber grating sensor.

일반적으로 광섬유격자센서는 파이버 브랙 그레이팅（Fiber Bragg Grating; FBG)이라고도 불리며, 광파이버의 코어부의 굴절율을 일정한 주기로 변화시킨 것으로서, 특정 파장의 광 만을 선택적으로 반사한다.  In general, optical fiber grating sensors include Fiber Bragg Grating; Also referred to as FBG), the refractive index of the core portion of the optical fiber is changed at regular cycles to selectively reflect only light of a specific wavelength.

또한, 이러한 광섬유격자센서는 고유한 파장 값을 가지며, 전자기파의 영향을 받지 않는 등 물리적인 특성이 매우 우수하여 기존의 전기식 게이지를 대체해가고 있는 우수한 물리량 측정소자로서, 현재 그 활용범위는 급속도로 증대되고 있는 실정이라 하겠다.In addition, the optical fiber grating sensor has a unique wavelength value and is excellent in physical properties such as being not affected by electromagnetic waves, and thus replacing the existing electric gauge, and its use range is rapidly increasing. It is an increasing situation.

대체로 이러한 광섬유격자센서는 단위면적당 인장력이 매우 높은 반면, 지름이 125㎛로 매우 작기 때문에 외부의 충격에 쉽게 파단 될 수 있어 건물이나 교각 등의 피측정물에 부착 시에는 매우 섬세한 작업이 요구된다.In general, the optical fiber grating sensor has a very high tensile force per unit area, but because the diameter is very small (125 μm), it can be easily broken by external impacts, so very delicate work is required when attaching it to a measurement object such as a building or a pier.

이에 선행기술 특허 등록번호 10-045416호의 광섬유격자센서용 고정구(이하 "선행기술"이라 함)가 이를 해결하였으나, 현장설치시 또 다른 문제점이 발생하였다. 그 문제점은 선행 기술이 부착면이 평평한 수평면에서는 설치가 용이하였으나, 터널 등의 곡률이 있는 면이나 바닥이 좌우로 뒤틀린 면에는 설치하기가 곤란한 문제점이 발생하였다. The optical fiber grating sensor fixture (hereinafter referred to as "prior art") of the prior art patent registration No. 10-045416 solved this problem, but another problem occurred in the field installation. The problem is that the prior art is easy to install on a flat surface of the mounting surface, but the problem is difficult to install on the surface of the curvature, such as tunnel or the floor twisted left and right.

상기에서 서술한 바와 같이 선행기술에서는 계측표면이 수평이 아닌 곡률이거나 또는 바닥이 좌우로 뒤틀리고 계측거리에 오차가 있을 경우 설치가 곤란한 경우가 발생한다. 따라서 본 발명은 이러한 환경요인을 해결하여 설치가 용이하도록 하는데 있다.As described above, in the prior art, when the measurement surface is not horizontal, the curvature or the floor is twisted from side to side and there is an error in the measurement distance, it is difficult to install. Therefore, the present invention is to solve the environmental factors to facilitate the installation.

본 발명은 고정편(6)과 고정판(4, 5) 사이에 볼(7)을 구비하여 전·후, 좌·우, 상·하 3축으로 고정편(6)이 이동할 수 있도록 한다.The present invention includes a ball 7 between the stationary piece 6 and the stationary plates 4 and 5 to allow the stationary piece 6 to move in three axes before and after, left, right, and up and down.

본 발명에 따라서 제작된 광섬유격자 변형률센서는 측정 대상물의 표면상태와 관계없이 센서 설치를 용이하게 하며, 계측지점이 수 Cm 오차가 발생하여도 임의 적으로 보정 할 수 있는 기능을 갖는다. 따라서 본 발명은 시공시간을 단축하여 인건비를 절약할 수 있으며, 자연스럽게 고정편과 고정편이 자리를 잡으므로 센서 고유의 감도를 유지시켜주며, 센서 설치시 불필요한 외력이 작용하지 않아 내구성을 높일 수 있는 발명이다.The optical fiber grating strain sensor fabricated according to the present invention facilitates the installation of the sensor irrespective of the surface state of the object to be measured, and has a function to arbitrarily correct the measurement point even if a few Cm errors occur. Therefore, the present invention can reduce labor costs by reducing the construction time, and naturally maintain the sensitivity of the sensor because the stationary piece and the stationary piece is in place, the invention that can increase the durability does not work unnecessary unnecessary force when installing the sensor to be.

이하 첨부한 도면을 바탕으로 본 발명을 상세히 설명한다. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명 광섬유격자 변형률센서를 나타낸 그림이다. 1 is a view showing the optical fiber grating strain sensor of the present invention.

본 발명은 건물이나 교량 등 피측정물의 변형률을 측정하기 위한 광섬유격자센서로서, 고정편(6)과 고정편 사이에 보호관(1)이 고정편에 삽입된 상태로 나사(3)에 의해 압박고정되며, 광섬유격자센서는 보호관(1)의 내부 중앙에 일직선으로 위치하고 광섬유격자센서의 양쪽 면이 한 쌍의 고정편(6) 내부에 인장된 상태로 고착제에 의해 고정되고 광섬유격자 변형률센서 감지부를 구성한다. 고정편(6)의 외부에 내부가 관통되고 한 측면이 개방된 볼(7)을 구비하여 고정편을 삽입하고, 볼의 외부에는 볼의 외경과 내접하는 고정판 상부(4), 고정판 하부(5)를 구성한다. 이때 고정판 하부에는 피측정 대상물과 결합할 수 있는 체결부(8)를 구비하는 것이 바람직하다. 본 발명의 광섬유격자 변형률센서의 설치는 상기와 같이 구비한 후 한 쌍의 고정판 하부(5)를 계측하고자 하는 측정 대상물에 측정하고자 하는 계측 거리만큼 이격 후 고정판 하부(5)를 피측정 대상물에 설치한다. 그리고 볼(7)이 삽입된 고정편(6) 양단을 고정판 하부(5)에 안착하고 고정판 상부(4)를 덮은 후 체결볼트(2)를 조여주면 고정판 하부(5)의 수평도에 따라서 볼(7)이 상·하, 좌·우로 움직여서 자연스럽게 수평을 잡게 되고, 계측거리(B)의 오차는 볼의 내부에 삽입된 고정편(6)이 전·후 로 이동하여 계측거리를 고정판 하부(5)의 거리로 자연스럽게 이동을 하게 된다. 이때 체결볼트(2)가 조여 지면서 볼(7)이 응력을 받게 되고 측면이 개방(7a)된 방향으로 찌그러짐이 발생 고정편을 압박고정하여 더 이상 이동이 발생하지 않도록 고정하는 역할을 한다. 볼(7)은 일종의 관절역할을 하며, 볼의 한 쪽 측면을 개방(7a)하는 것은 체결볼트(2)로 고정시 볼이 좀더 잘 찌그러지도록 유도하기 위함이다. 이후 FBG 센서 보호 및 셋팅 유지용 나사(3)를 해지하면, 설치가 완료되고, 공섬유격자 변형률센서는 민감하게 구조물의 변형을 감지한다.The present invention is an optical fiber grating sensor for measuring the strain of the object to be measured, such as a building or a bridge, the pressure fixing by the screw (3) in the state in which the protective tube (1) is inserted into the fixing piece between the fixing piece (6) and the fixing piece The fiber optic lattice sensor is located in a straight line in the inner center of the protective tube 1, and both sides of the optical fiber lattice sensor are fixed by a fixing agent in a state in which the two sides of the optical fiber lattice are tensioned inside the pair of fixing pieces 6, and constitute the optical fiber lattice strain sensor detector. do. The fixing piece 6 is provided with a ball 7 penetrating the inside of the fixing piece 6 and one side is opened, and the fixing plate upper part 4 and the fixing plate lower part 5 which are inscribed with the outer diameter of the ball. ). At this time, it is preferable to have a fastening portion 8 that can be coupled to the measurement object under the fixed plate. The installation of the optical fiber grating strain sensor of the present invention is provided as described above, and then the fixed plate lower part 5 is installed on the object to be measured after the pair of fixing plate lower parts 5 are separated by a measurement distance to be measured on the measurement object to be measured. do. Then, both ends of the fixing piece 6 into which the ball 7 is inserted are seated on the lower part of the fixing plate 5, the fixing plate upper part 4 is covered, and the fastening bolt 2 is tightened. (7) moves up, down, left and right to naturally level, and the error of measurement distance (B) is that the fixing piece (6) inserted into the ball moves forward and backward so that the measurement distance is lowered to the bottom of the fixed plate ( It will move naturally to the distance of 5). At this time, the fastening bolt (2) is tightened and the ball (7) is stressed and the lateral distortion is generated in the direction of the opening (7a) acts to press the fixed piece fixed to prevent any further movement. The ball 7 serves as a kind of joint, and opening one side of the ball 7a is for inducing the ball to be more distorted when fixed by the fastening bolt 2. After the FBG sensor protection and setting maintenance screw (3) is released, the installation is completed, the co-fiber lattice strain sensor sensitively detects deformation of the structure.

상기에서 언급한 방법 외에 토목구조물 단면의 연속적인 변형을 측정하기 위해서는 도 8에서와 같이 상기에서 설명한 고정판 하부(5)를 도 8의 ⊥형 고정편 하부(5t)로 치환하여, 설치 측정하면 동일 지점 및 동일선상의 변형을 오차 없이 연속적으로 계측할 수 있는 방법을 제공한다. 다음은 도 8을 바탕으로 광섬유격자 변형률센서의 연속설치를 간단히 설명하도록 하며 도면에 미 도시된 부분은 상기에서 설명한 부분과 일치하므로 상기 설명을 참조하는 것이 바람직하다.In addition to the above-mentioned method, in order to measure the continuous deformation of the cross-section of the civil structure, as shown in FIG. 8, the lower part of the fixing plate 5 described above is replaced by the lower part of the U-shaped fixing piece 5t of FIG. It provides a method that can continuously measure the point and collinear deformation without error. Next, the continuous installation of the optical fiber grating strain sensor will be described briefly with reference to FIG. 8, and the part not shown in the drawings is the same as that described above.

고정편(6)과 고정편 사이에 보호관(1)이 고정편에 삽입된 상태로 나사(3)에 의해 압박고정되며, 광섬유격자센서는 보호관(1)의 내부 중앙에 일직선으로 위치하고 광섬유격자센서의 양쪽 면이 한 쌍의 고정편(6) 내부에 인장된 상태로 고착제에 의해 고정되고 광섬유격자 변형률센서 감지부를 구성한다. 고정편(6)의 외부에 내부가 관통되고 한 측면이 개방된 볼(7)을 구비하여 고정편을 삽입하고, 볼의 외부에는 볼의 외경과 내접하는 고정판 상부(4), ⊥형 고정판 하부(5t)를 구성한다. 이때 고정판 하부에는 피측정 대상물과 결합할 수 있는 체결부(8)를 구비하는 것이 바람직하다. 본 발명의 광섬유격자 변형률센서의 설치는 상기와 같이 구비한 후 한 쌍의 고정판 하부(5t)를 계측하고자 하는 측정 대상물에 측정하고자 하는 계측 거리만큼 이격 후 ⊥형 고정판 하부(5t)를 피측정 대상물에 설치한다. 그리고 볼(7)이 삽입된 고정편(6) 양단을 ⊥형 고정판 하부(5t)에 안착하고 고정판 상부(4)를 덮은 후 체결볼트(2)를 조여주면 ⊥형 고정판 하부(5t)의 수평도에 따라서 볼(7)이 상·하, 좌·우로 움직여서 자연스럽게 수평을 잡게 되고, 계측거리(B)의 오차는 볼의 내부에 삽입된 고정편(6)이 전·후 로 이동하여 계측거리를 ⊥형 고정판 하부(5t)의 거리로 자연스럽게 이동을 하게 된다. 이때 체결볼트(2)가 조여 지면서 볼(7)이 응력을 받게 되고 측면이 개방(7a)된 방향으로 찌그러짐이 발생 고정편을 압박고정하여 더 이상 이동이 발생하지 않도록 고정하는 역할을 한다. 볼(7)은 일종의 관절역할을 하며, 볼의 한쪽 측면을 개방(7a)하는 것은 체결볼트(2)로 고정시 볼이 좀더 잘 찌그러지도록 유도하기 위함이다. 이후 FBG 센서 보호 및 셋팅 유지용 나사(3)를 해지하면, 하나의 광섬유격자 변형률센서의 설치가 완료되며, 그 뒤편 ⊥형 고정판 하부(5t)에 반복적으로 위 작업을 수행하면 동일 축상에 광섬유격자 변형률센서를 연속적으로 설치하는 방법이다. Between the fixing piece 6 and the fixing piece, the protective tube 1 is pressed and fixed by the screw 3 in a state where the protective tube 1 is inserted into the fixing piece, and the optical fiber grating sensor is located in a straight line in the inner center of the protective tube 1 and the optical fiber grating sensor. Both sides of the are fixed by a fixing agent in a tensioned state inside the pair of fixing pieces (6) and constitute the optical fiber grating strain sensor detection unit. The fixing piece 6 is provided with a ball 7 penetrating the inside of the fixing piece 6 and one side is opened, and the fixing plate upper part 4 which inscribes the outer diameter of the ball and the lower part of the fin-shaped fixing plate. It constitutes 5t. At this time, it is preferable to have a fastening portion 8 that can be coupled to the measurement object under the fixed plate. The installation of the optical fiber grating strain sensor of the present invention is provided as described above, and the pair of fixed plate lower portions 5t are separated from the measurement target to be measured by the measurement distance to be measured, and the lower portion of the U-shaped fixed plate 5t is measured. Install on. Then, both ends of the fixing piece 6 into which the ball 7 is inserted are mounted on the lower part of the fin-shaped fixing plate 5t, the fixing plate upper part 4 is tightened, and the fastening bolt 2 is tightened. According to the figure, the ball 7 moves up, down, left and right to naturally level, and the error of the measurement distance B is that the fixing piece 6 inserted into the ball moves forward and backward and the measurement distance It will naturally move to the distance of the bottom of the fin-shaped fixing plate (5t). At this time, the fastening bolt (2) is tightened and the ball (7) is stressed and the lateral distortion is generated in the direction of the opening (7a) acts to press the fixed piece fixed to prevent any further movement. Ball 7 serves as a kind of joint, opening one side of the ball (7a) is to induce the ball to crush more well when fixed with the fastening bolt (2). Then, if the FBG sensor protection and setting maintenance screw (3) is released, the installation of one optical fiber grating strain sensor is completed, and if the above operation is repeatedly performed on the lower part of the back-shaped fixing plate (5t), the optical fiber grating on the same axis It is a method to install the strain sensor continuously.

이상에서 설명한 본 발명은, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 있어 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 여러 가지 치환, 변형 및 변경이 가능하므로 전술한 실시 예에 한정되는 것이 아니다.The present invention described above is limited to the above-described embodiments as various substitutions, modifications, and changes are possible within the scope of the present invention to those skilled in the art without departing from the spirit of the present invention. It is not.

도 1은 본 발명에 따른 일실시 예1 is an embodiment according to the present invention

도 2는 본 발명의 좌측 확대도2 is an enlarged left view of the present invention;

도 3은 본 발명의 곡면이 있는 곳에 설치시의 구성도3 is a configuration diagram at the time of installation where the curved surface of the present invention

도 4는 본 발명의 좌우 비대칭 설치시의 구성도4 is a block diagram of the left and right asymmetrical installation of the present invention

도 5는 본 발명의 좌측 내부 결합 구조도5 is a left inner coupling structure of the present invention

도 6은 본 발명의 고정편, 볼, 고정판 결합 구조도Figure 6 is a fixing piece, ball, fixing plate coupling structure diagram of the present invention

도 7은 본 발명 설치시 계측거리 오차 보상을 위한 볼 위치의 이동 도면7 is a view of the movement of the ball position for the measurement distance error compensation when installing the present invention

도 8은 토목구조물에 연속설치되는 광섬유격자 변형률센서 설치 예8 is an example of the installation of the optical fiber grating strain sensor continuously installed in the civil engineering structure

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

A : 본 발명에 의한 광섬유격자센서 변형률센서 A: Optical fiber grating sensor strain sensor according to the present invention

B : 계측대상물의 계측거리 B: measuring distance of measurement object

1 : 보호관 2 : 고정판, 볼, 고정편 결합나사 1: Protective tube 2: Fixing plate, ball, fixing piece coupling screw

3 : FBG 센서 보호 및 셋팅 유지용 나사  3: FBG sensor protection and setting maintenance screw

4 : 고정판 상부 4a: 고정판 상부의 볼 안착 홈  4: Upper fixing plate 4a: Ball seating groove in the upper fixing plate

5 : 고정판 하부 5a: 볼의 안착면 5: lower fixing plate 5a: seating surface of the ball

5t: ⊥형 고정판 하부 6 : 고정편 5t: Lower part of flat type plate 6: Fixing piece

7 : 볼 7a: 볼의 개방 면 7 ball 7a: open side of the ball

8 : 고정판과 계측대상물의 체결부 8: Fastening plate and the fastening part of the measurement object

Claims (4)

건물이나 교량 등 피측정물의 변형률을 측정하기 위한 광섬유격자 변형률센서에 있어서, In the optical fiber grating strain sensor for measuring the strain of the measurement object such as buildings and bridges, 변형률을 측정하기 위한 계측대상물 간에 계측거리(B)를 유지한 채 계측거리(B) 양단에 위치하는 고정편(6);A fixing piece 6 positioned at both ends of the measurement distance B while maintaining the measurement distance B between the measurement objects for measuring the strain rate; 상기 계측거리(B) 양단의 고정편(6)과 고정편(6) 사이에서 위치하며 그 끝단이 상기 고정편(6)에 삽입된 상태로 광섬유격자센서 보호 및 셋팅 유지용 나사(3)에 의해 압박 고정되는 보호관(1);Located between the fixing piece 6 and the fixing piece 6 at both ends of the measurement distance B, and the end of which is inserted into the fixing piece 6 to the optical fiber grating sensor protection and setting holding screw 3. A protective tube 1 which is fixed by pressure; 상기 보호관(1)의 내부 중앙에 일직선으로 위치하고, 양쪽 끝단이 상기 계측거리(B) 양단에 위치한 한 쌍의 고정편(6) 내부에서 인장된 상태로 고착제에 의해 고정되는 광섬유격자센서;An optical fiber lattice sensor positioned in a straight line in the inner center of the protective tube (1) and fixed at both ends by a fixing agent in a tensioned state in a pair of fixing pieces (6) positioned at both ends of the measurement distance (B); 내부에 형성된 관통공을 통해 상기 고정편(6)이 삽입되는 내부가 관통된 볼(7);A ball (7) through which the fixing piece (6) is inserted through a through hole formed therein; 상기 볼(7)의 외주면과 내접하는 고정판 상부(4) 및 고정판 하부(5); 및A fixing plate upper portion 4 and a fixing plate lower portion 5 which are inscribed with the outer circumferential surface of the ball 7; And 상기 고정판 상부(4) 및 고정판 하부(5)를 체결하여 조이는 체결볼트(2);를 포함하고,And a fastening bolt 2 fastening by fastening the fixing plate upper part 4 and the fixing plate lower part 5 to each other. 상기 고정판 상부 및 하부(4, 5)는 안쪽 면에 볼(7)의 안착 면을 포함하고, 상기 볼(7)은 내부의 관통공으로부터 한 측면이 외부로 개방된 형태의 개방 면(7a)를 포함하여; 체결볼트(2)를 조임으로써 상기 볼(7)의 내주면과 상기 고정편(6)의 외주면이 상기 고정판 상부(4) 및 고정판 하부(5)에 의해 압박 고정되는 것을 특징으로 하는 광섬유격자 변형률센서.The fixing plate upper and lower portions 4 and 5 include a seating surface of the ball 7 on an inner surface thereof, and the ball 7 has an open surface 7a having one side open to the outside from a through hole therein. Including; The optical fiber grating strain sensor is characterized in that the inner circumferential surface of the ball 7 and the outer circumferential surface of the fixing piece 6 are pressed and fixed by the fixing plate upper part 4 and the fixing plate lower part 5 by tightening the fastening bolt 2. . 삭제delete 삭제delete 제 1항에 있어서;The method of claim 1; 고정판 하부(5)는 ⊥형 고정판 하부(5t)인 것을 특징으로 하는 광섬유격자 변형률센서.Fixed plate lower part (5) is an optical fiber grating strain sensor, characterized in that the lower portion of the fixed plate (5t).
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018221891A1 (en) * 2017-05-30 2018-12-06 (주)에프비지코리아 Apparatus and method for measuring height of molten material in blast furnace
KR20220102832A (en) * 2021-01-14 2022-07-21 강원대학교산학협력단 Fiber bragg grating strain sensor pakage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101901389B1 (en) * 2017-01-13 2018-09-28 (주)에프비지코리아 Strain sensor using fbg sensor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970043557A (en) * 1995-12-05 1997-07-26 박홍기 Manufacturing method of polyester fiber of a consumption tank having excellent deep color effect
JPH109867A (en) * 1996-06-19 1998-01-16 Topcon Corp Laser apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970043557A (en) * 1995-12-05 1997-07-26 박홍기 Manufacturing method of polyester fiber of a consumption tank having excellent deep color effect
JPH109867A (en) * 1996-06-19 1998-01-16 Topcon Corp Laser apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018221891A1 (en) * 2017-05-30 2018-12-06 (주)에프비지코리아 Apparatus and method for measuring height of molten material in blast furnace
KR20220102832A (en) * 2021-01-14 2022-07-21 강원대학교산학협력단 Fiber bragg grating strain sensor pakage
KR102499778B1 (en) * 2021-01-14 2023-02-15 강원대학교산학협력단 Fiber bragg grating strain sensor pakage

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