KR20080004785U - Fiber optic strain gauge apparatus - Google Patents

Fiber optic strain gauge apparatus Download PDF

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KR20080004785U
KR20080004785U KR2020070006311U KR20070006311U KR20080004785U KR 20080004785 U KR20080004785 U KR 20080004785U KR 2020070006311 U KR2020070006311 U KR 2020070006311U KR 20070006311 U KR20070006311 U KR 20070006311U KR 20080004785 U KR20080004785 U KR 20080004785U
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South Korea
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optical fiber
strain sensor
fiber strain
fixed
lower plate
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KR2020070006311U
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Korean (ko)
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강윤태
최재웅
장현숙
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삼성중공업 주식회사
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Publication of KR20080004785U publication Critical patent/KR20080004785U/en

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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
    • G01B11/165—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by means of a grating deformed by the object
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • G01D5/35306—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement
    • G01D5/35309—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer
    • G01D5/35316—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer using a 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
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • G01M7/025—Measuring arrangements

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

Abstract

본 고안은 광섬유 변형률 센서 장치에 관한 것이다. The present invention relates to an optical fiber strain sensor device.

본 고안은, 변형률을 측정하는 광섬유 변형률 센서와, 상기 광섬유 변형률 센서를 인장된 상태로 양측에서 고정하며 구조물에 대해 고정되는 한쌍의 지지대와, 상기 일측 지지대에서 상기 광섬유 변형률 센서의 고정 부위를 수평방향으로 이동시키기 위해 구비되는 수평이동수단을 포함한다. The present invention, the optical fiber strain sensor for measuring the strain, a pair of supports fixed to the structure and fixed to both sides in the tensioned state of the optical fiber strain sensor, and the fixed portion of the optical fiber strain sensor in the one side support in the horizontal direction It includes a horizontal moving means provided to move to.

따라서, 광섬유 변형률 센서에 대한 캘리브레이션을 매우 용이하고 신속하면서 정밀하게 실시할 수 있는 효과가 있다. Therefore, the calibration of the optical fiber strain sensor can be performed very easily, quickly and precisely.

광섬유, 격자, 변형률, 센서, 인장, 장력, 캘리브레이션 Fiber optic, grating, strain, sensor, tensile, tension, calibration

Description

광섬유 변형률 센서 장치{FIBER OPTIC STRAIN GAUGE APPARATUS}Fiber Optic Strain Sensor Devices {FIBER OPTIC STRAIN GAUGE APPARATUS}

도 1은 광섬유 변형률 센서가 선박에 설치된 것을 보여주는 도면, 1 is a view showing that the optical fiber strain sensor is installed on the ship,

도 2는 종래 기술에 따른 광섬유 변형률 센서 장치를 보여주는 도면, 2 is a view showing an optical fiber strain sensor device according to the prior art,

도 3은 본 고안의 바람직한 실시예에 따른 광섬유 변형률 센서 장치를 보여주는 도면, 3 is a view showing an optical fiber strain sensor device according to an embodiment of the present invention,

도 4는 본 고안의 바람직한 실시예에 따른 보호커버를 보여주는 도면이다. 4 is a view showing a protective cover according to an embodiment of the present invention.

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

10 : 광섬유 변형률 센서 12 : 광섬유10 fiber optic strain sensor 12 fiber optic

12a : 격자센서부 20, 30 : 지지대12a: grid sensor unit 20, 30: support

20a : 상판 20b : 하판20a: top plate 20b: bottom plate

20a-1 : 슬라이딩홈 20b-1 : 슬라이딩돌기20a-1: Sliding groove 20b-1: Sliding protrusion

20a-2 : 상판측 브래킷 20b-2 : 하판측 브래킷20a-2: Upper plate side bracket 20b-2: Lower plate side bracket

20b-2-1 : 나사공 21, 31 : 고정브래킷20b-2-1: screw hole 21, 31: fixing bracket

22 : 조절볼트22: adjusting bolt

본 고안은 광섬유 변형률 센서 장치에 관한 것으로서, 더욱 상세하게는 광섬유 변형률 센서를 양측에서 고정하는 지지대 중 일측 지지대에서 광섬유 변형률 센서 고정 부위를 수평방향으로 이동시킬 수 있도록 하여, 광섬유 변형률 센서의 인장 정도를 조절하여 캘리브레이션(calibration)을 실시할 수 있게 되는 광섬유 변형률 센서 장치에 관한 것이다. The present invention relates to an optical fiber strain sensor device, and more particularly, it is possible to move the optical fiber strain sensor fixing part in the horizontal direction in one support of the support for fixing the optical fiber strain sensor on both sides, the tension degree of the optical fiber strain sensor It relates to an optical fiber strain sensor device that can be adjusted to perform the calibration (calibration).

일반적으로, 선박의 안전 운항 측면에서, 선체의 변형량(즉, 응력 변화)을 측정하여 운용자에게 제공하는 것은 선체를 상시 감시한다는 의미로, 중요한 항해 보조수단이 되게 된다. In general, in terms of the safe operation of a ship, measuring the amount of deformation (ie stress change) of the hull and providing it to the operator means monitoring the hull at all times, which becomes an important navigation aid.

즉, 선박은 적재 화물 및 운항 조건 등에 따라 그 선체가 압축 또는 인장되도록 변형을 일으키게 되므로 이 변형량을 측정하여 제공하는 것이며, 이를 위해 근래에는 우수한 측정능력을 갖는 광섬유 변형률 센서를 이용하고 있다. That is, since the ship is to be deformed so that the hull is compressed or tensioned according to the load cargo and operating conditions, it is to measure and provide this amount of deformation, and in order to this end, in recent years, the optical fiber strain sensor having an excellent measurement capability is used.

해당 광섬유 변형률 센서로는 격자형 광섬유 센서(Fiber Bragg Grating : FBG)를 주로 이용하고 있으며, 이 격자형 광섬유 센서는 광섬유 케이블의 특정위치에 격자형태로 형성되는 격자센서부를 일체로 구비하며, 따라서 설치된 구조물의 변형에 상응되게 그 격자센서부의 격자 간격이 압축 또는 인장되면서 해당 격자센서부로부터 발생되는 반사파장(즉, 브래그 파장)이 변화되게 되므로, 이 반사파장의 변화를 계측하여 변형량을 측정할 수 있게 된다. The fiber strain sensor is mainly used as a fiber bragg grating (FBG), and the grating fiber optic sensor is provided with a grating sensor unit which is formed in a lattice shape at a specific position of an optical fiber cable and is thus installed. As the lattice spacing of the lattice sensor unit is compressed or stretched corresponding to the deformation of the structure, the reflected wavelength (that is, Bragg wavelength) generated from the lattice sensor unit is changed, so that the amount of deformation can be measured by measuring the change of the reflected wavelength. Will be.

이러한 광섬유 변형률 센서의 가장 큰 장점으로는 다수개의 표적지점에 대한 변형량를 측정할 수 있다는 것으로, 도 1에 나타낸 바와 같이, 한가닥의 광섬유(12)에 다수개의 격자센서부(12a)를 형성하고 이들 다수개의 격자센서부(12a)를 이용하여 선체(s)상의 여러 표적지점에 대한 변형량을 측정할 수 있게 된다. The biggest advantage of the optical fiber strain sensor is that it is possible to measure the deformation amount of a plurality of target points, as shown in Figure 1, to form a plurality of grating sensor unit 12a in a single fiber 12, It is possible to measure the deformation amount for the various target points on the hull (s) using the two grating sensor unit (12a).

그리고, 광섬유 변형률 센서(10)를 구조물에 대해 설치함에 있어 종래에는 그 자체를 구조물에 직접 부착하는 방법이 이용되었으나 그 설치 및 취급이 매우 까다로워, 최근에는 별도의 장착용 고정구를 이용하는 방법이 개발되었다. In addition, the method of directly attaching the fiber strain sensor 10 to the structure has been conventionally used as a method of directly attaching itself to the structure, but the installation and handling thereof are very difficult. Recently, a method of using a separate mounting fixture has been developed. .

이와 관련하여, 대한민국 등록특허 10-0495416호에는 광섬유격자센서용 고정구가 개시되어 있으며, 해당 기술을 도 2에 나타낸다. In this regard, Korean Patent No. 10-0495416 discloses a fixture for an optical fiber grating sensor, and the technique is shown in FIG. 2.

해당 기술을 살펴 보면, 광섬유 변형률 센서(10)의 광섬유(12)는 적당한 인장력을 갖도록 팽팽하게 당겨진 상태로 설치되어야만 이후 정확한 변형률 값을 측정할 수 있으므로, 중간부에 격자센서부(미도시)를 갖는 광섬유(12)를 팽팽하게 인장되도록 한 상태에서 그 양측을 서로 이격되는 한쌍의 고정편(4)으로 고정하고, 해당 고정편(4)을 구조물의 표면에 대해 취부 고정하며, 광섬유 변형률 센서(10)는 보호관(2)내에 삽입되어 보호될 수 있게 된다. Looking at the technology, since the optical fiber 12 of the optical fiber strain sensor 10 should be installed in a state in which the fiber 12 is pulled tightly to have a suitable tensile force, since the accurate strain value can be measured later, a grid sensor part (not shown) In the state in which the optical fiber 12 having a tension is tensioned, both sides are fixed with a pair of fixing pieces 4 spaced apart from each other, and the fixing pieces 4 are fixed to the surface of the structure, and the optical fiber strain sensor ( 10 can be inserted into the protective tube (2) to be protected.

그러나, 이상과 같은 종래의 광섬유 변형률 센서 장치는 다음과 같은 문제점을 갖고 있다. However, the conventional optical fiber strain sensor device as described above has the following problems.

즉, 교량, 터널과 같은 구조물과 달리 선박의 경우에는 화물의 적재 조건 등에 따라 변형량이 매우 유동적이게 되므로, 수시로 광섬유 변형률 센서(10)의 인장된 정도, 즉 장력을 조정하는 캘리브레이션(calibration)을 실시하여 영점을 다시 맞춤으로써 이후 정확한 변형량을 측정할 수 있도록 해야 하는데, 종래 기술에 따르면 일단 설치 후 그 장력을 조절할 수 없다는 문제점이 있었다. In other words, unlike structures such as bridges and tunnels, in the case of ships, the amount of deformation becomes very fluid according to the loading conditions of cargoes, and thus the calibration is performed to adjust the degree of tension of the optical fiber strain sensor 10, that is, the tension from time to time. By re-zeroing to be able to measure the amount of deformation afterwards, according to the prior art there was a problem that can not adjust the tension once installed.

물론, 종래 기술의 경우에도 설치된 상태를 해체하고 광섬유 변형률 센 서(10)의 인장력을 조절할 수는 있지만, 매우 오랜 시간 및 많은 노력이 소요되는 난이한 작업으로, 사실상 인장력 조절이 불가능하고, 또한 인장력을 정밀하게 조절할 수도 없었다. Of course, in the case of the prior art, it is possible to dismantle the installed state and adjust the tensile force of the optical fiber strain sensor 10, but it is a difficult operation that takes a very long time and a lot of effort, and in fact, it is impossible to control the tensile force, and also the tensile force Could not be precisely adjusted.

본 고안은 상기와 같은 제반 문제점을 해결하기 위하여 안출된 것으로서, 설치된 상태에서 매우 용이하고 신속하면서 정밀하게 장력을 조정하여 캘리브레이션을 실시할 수 있는 광섬유 변형률 센서 장치를 제공하는데 그 목적이 있다.The present invention has been made to solve the above problems, and an object of the present invention is to provide an optical fiber strain sensor device that can be calibrated by adjusting the tension very easily, quickly and precisely in an installed state.

본 고안의 상기 목적과 여러가지 장점은 이 기술분야에 숙련된 사람들에 의해 첨부된 도면을 참조하여 아래에 기술되는 고안의 바람직한 실시예로부터 더욱 명확하게 될 것이다.The above object and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

상술한 목적을 달성하기 위한 본 고안의 광섬유 변형률 센서 장치는, 변형률을 측정하는 광섬유 변형률 센서와, 상기 광섬유 변형률 센서를 인장된 상태로 양측에서 고정하며 구조물에 대해 고정되는 한쌍의 지지대와, 상기 일측 지지대에서 상기 광섬유 변형률 센서의 고정 부위를 수평방향으로 이동시키기 위해 구비되는 수평이동수단을 포함한다. The optical fiber strain sensor device of the present invention for achieving the above object, the optical fiber strain sensor for measuring the strain, a pair of supports fixed to the structure by fixing the optical fiber strain sensor in a tensioned state, and the one side It includes a horizontal moving means provided to move the fixed portion of the optical fiber strain sensor in the horizontal direction on the support.

이하, 첨부된 도면을 참조로 본 고안의 바람직한 실시예를 상세히 설명하기로 한다. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 3은 본 고안의 바람직한 실시예에 따른 광섬유 변형률 센서 장치를 나타낸다. 3 shows an optical fiber strain sensor device according to a preferred embodiment of the present invention.

본 고안에 따른 광섬유 변형률 센서 장치는, 중간부에 격자센서부(12a)를 갖는 광섬유(12)로 이루어져 변형률을 측정하는 광섬유 변형률 센서(10)와, 이 광섬유 변형률 센서(10)를 적정하게 인장되도록 한 상태로 양측에서 상면측을 통해 고정하며 하면측을 통해 구조물에 취부 고정되는 양측 한쌍의 지지대(20, 30)와, 설치된 광섬유 변형률 센서(10)의 장력을 조절하기 위해 일측 지지대(20)에서 광섬유 변형률 센서(10) 고정 부위를 수평방향으로 이동시키기 위해 구비되는 수평이동수단을 포함하게 된다. The optical fiber strain sensor device according to the present invention is composed of an optical fiber 12 having a grating sensor portion 12a in an intermediate portion, and the optical fiber strain sensor 10 for measuring strain, and the optical fiber strain sensor 10 is properly tensioned One side support 20 to adjust the tension of the two pairs of support (20, 30) and the optical fiber strain sensor 10 installed on both sides fixed through the upper surface side in a state to be fixed to the structure through the lower surface. In the optical fiber strain sensor 10 includes a horizontal movement means provided to move the fixed portion in the horizontal direction.

여기서, 수평이동수단은, 일측 지지대(20)의 일부를 이루도록 하부측에 구비되며 하면측을 통해 구조물에 취부 고정되는 하판(20b)과, 일측 지지대(20)의 일부를 이루도록 하판(20b)상에서 슬라이딩 이동 가능하게 상부측에 구비되며 상면측을 통해 광섬유 변형률 센서(10)의 일측을 고정하는 상판(20a)과, 고정된 하판(20b)에 대해 상판(20a)을 밀거나 잡아당겨 이동시키게 되는 이동조작수단으로 이루어지게 된다. Here, the horizontal movement means is provided on the lower side to form a part of the one side support 20, the lower plate 20b is fixed to the structure through the lower surface side, and on the lower plate 20b to form a part of the one side support 20 The upper plate 20a which is provided on the upper side to be slidably movable and fixes one side of the optical fiber strain sensor 10 through the upper surface side, and pushes or pulls the upper plate 20a with respect to the fixed lower plate 20b. It is made of a mobile operation means.

이때, 하판(20b)상에서 상판(20a)이 수평방향으로 안내되면서 슬라이딩 이동될 수 있도록 상판(20a)과 하판(20b)에는 서로 형합을 이루는 슬라이딩홈(20a-1)과 슬라이딩돌기(20b-1)가 각기 구비될 수 있다. At this time, the upper plate (20a) and the sliding projection (20a-1) and the sliding projection (20b-1) forming a mutually formed in the upper plate (20a) and the lower plate (20b) so that the upper plate (20a) is slid and moved in the horizontal direction on the lower plate (20b) ) May be provided respectively.

또한, 이동조작수단은, 상판(20a)측에 그 일단이 고정되고 하판(20b)측에 대해서는 나사결합을 이루어 그 회전에 따라 하판(20b)에 대해 상판(20a)을 밀거나 잡아당겨 이동시킬 수 있는 조절볼트(22)로 이루어질 수 있다. In addition, one end of the moving operation means is fixed to the upper plate 20a side and screwed to the lower plate 20b side to push or pull the upper plate 20a relative to the lower plate 20b according to the rotation thereof. It can be made of an adjustment bolt 22.

물론, 도시된 바와 같이, 상판(20a)측에서 연장되도록 형성되는 상판측 브래 킷(20a-2)에 조절볼트(22)의 일단이 고정되고, 하판(20b)측에서 연장되도록 형성되는 하판측 브래킷(20b-2)상의 나사공(20b-2-1)에 조절볼트(22)가 관통되게 체결될 수 있다. Of course, as shown, one end of the adjustment bolt 22 is fixed to the upper plate side bracket 20a-2 formed to extend from the upper plate 20a side, and the lower plate side formed to extend from the lower plate 20b side. The adjusting bolt 22 may be fastened to the screw hole 20b-2-1 on the bracket 20b-2.

덧붙여, 광섬유 변형률 센서(10)의 양측을 양측 지지대(20, 30)의 상면측에 고정하는 방법으로는 고착제를 이용하거나 별도의 고정브래킷(21, 31)을 이용하는 등 적절한 방법을 채택할 수 있다. In addition, as a method of fixing the both sides of the optical fiber strain sensor 10 to the upper surface side of the two support (20, 30), a suitable method such as using a fixing agent or a separate fixing bracket (21, 31) can be adopted. .

또한, 양측 지지대(20, 30)의 하면측을 구조물에 고정하는 방법은 접착제나 고정볼트를 이용하거나 용접을 이용하는 등 적절한 방법을 채택할 수 있다. In addition, the method of fixing the lower surface side of the both sides of the support (20, 30) to the structure may use a suitable method such as using an adhesive or fixing bolts or welding.

그리고, 수평이동수단이 구비되지 않는 타측 지지대(30)는 구지 상판과 하판으로 나누어져 구비될 필요성은 없으며, 하나의 판으로 이루어질 수도 있고, 물론 양측 지지대(20, 30)의 높이는 동일해야 한다. And, the other support 30 is not provided with a horizontal moving means is not necessary to be divided into the upper plate and the lower plate, it may be made of a single plate, of course the height of both sides of the support (20, 30) should be the same.

이상과 같은 광섬유 변형률 센서 장치의 설치 방법에 대해 설명하면, 먼저, 양측 지지대(20, 30)를 적정거리 이격시켜 구조물상에 고정하여 설치한 다음, 양측 지지대(20, 30)의 상면을 통해 인장된 상태의 광섬유 변형률 센서(10)의 양측을 각각 고정하게 된다. Referring to the installation method of the optical fiber strain sensor device as described above, first, the two side support (20, 30) is fixed and installed on the structure spaced apart by a suitable distance, and then tensioned through the upper surface of both support (20, 30) Both sides of the optical fiber strain sensor 10 in the closed state are respectively fixed.

이로써, 그 설치는 완료될 수 있으며, 이와 같이 설치된 상태에서 이후 광섬유 변형률 센서(10)는 구조물의 변형량을 측정하여 제공하게 된다. As a result, the installation may be completed, and in this state, the optical fiber strain sensor 10 may provide the measured amount of deformation of the structure.

그리고, 이와 같이 사용됨에 있어 구조물은 적재 화물 조건 등의 변화에 따라 변형을 일으키게 되고, 이러한 변형이 반복됨으로써 구조물 및 광섬유 변형율 센서(10)의 설치 상태에 변형이 발생되게 되어, 결국 해당 광섬유 변형율 센서(10) 의 기본 출력값이 변화되어 부정확한 측정값을 나타나게 된다. In addition, in this manner, the structure is deformed according to changes in loading conditions, such that the deformation is repeated, so that deformation is generated in the installation state of the structure and the optical fiber strain sensor 10, and finally, the optical fiber strain sensor. The default output value of (10) changes, resulting in inaccurate measured values.

따라서, 주기적으로 광섬유 변형률 센서(10)의 장력을 조절하여 기본 출력값에 대한 캘리브레이션을 실시하게 되며, 이때에는 계산을 통해 현재 구조물의 변형량에 상응하는 현재 합당한 광섬유 변형률 센서(10)의 변형량을 예측하고, 해당 예측 변형량에 상당하는 기본 출력값을 출력하도록 조정하기 위해 일측 지지대(20)의 상판(20a)을 수평방향으로 이동시키게 된다. Therefore, the tension of the optical fiber strain sensor 10 is periodically adjusted to calibrate the basic output value. In this case, the deformation of the current reasonable optical fiber strain sensor 10 corresponding to the deformation amount of the current structure is predicted through calculation. In order to output a basic output value corresponding to the predicted deformation amount, the upper plate 20a of the one side support 20 is moved in the horizontal direction.

즉, 운용자는 조절볼트(22)를 정방향 또는 역방향으로 회전시켜 일측 지지대(20)의 상판(20a)이 타측 지지대(30)에 대해 보다 이격되거나 근접되도록 하여 광섬유 변형률 센서(10)의 장력이 변화되도록 조정하며, 광섬유 변형률 센서(10)로부터의 기본 출력값이 정확히 맞추어진 시점에서 조절볼트(22)에 대한 조작을 정지하게 된다. That is, the operator rotates the adjustment bolt 22 in the forward or reverse direction so that the top plate 20a of one support 20 is more spaced or closer to the other support 30 so that the tension of the optical fiber strain sensor 10 is changed. It is adjusted so that the operation on the adjusting bolt 22 is stopped when the basic output value from the optical fiber strain sensor 10 is correctly adjusted.

이 과정에서, 운용자의 조절볼트(22)에 대한 회전 조작에 따라 해당 조절볼트(22)의 일단에 고정되어 있는 상판(20a)이 고정된 하판(20b)에 대해 수평방향으로 슬라이딩 이동되게 되며, 그 슬라이딩 이동시 서로 형합을 이루고 있는 슬라이딩돌기(20b-1)와 슬라이딩홈(20a-1)에 의해 상판(20a)이 정확한 직선방향으로 슬라이딩될 수 있게 된다. In this process, the upper plate 20a fixed to one end of the adjusting bolt 22 is slidably moved in the horizontal direction with respect to the fixed lower plate 20b according to the rotation operation of the adjusting bolt 22 of the operator. During the sliding movement, the upper plate 20a can be slid in the correct linear direction by the sliding protrusions 20b-1 and the sliding grooves 20a-1, which form a mutual relationship.

덧붙여, 광섬유 변형률 센서(10)는 설치된 상태에서 외부 물체의 접촉에 의해 쉽게 단락될 수 있는 등 손상이 발생될 수 있으므로, 설치된 광섬유 변형률 센서(10)측으로 외부 물체가 근접하는 것을 차단하기 위해, 도 4에 나타낸 바와 같은 보호커버(40)가 광섬유 변형률 센서(10) 및 양측 지지대(20, 30)를 덮도록 추가로 구비될 수 있다. In addition, since the optical fiber strain sensor 10 may be damaged, such as being easily short-circuited by the contact of an external object in the installed state, in order to block an external object from approaching the optical fiber strain sensor 10 side, FIG. A protective cover 40 as shown in 4 may be further provided to cover the optical fiber strain sensor 10 and both support members 20 and 30.

해당 보호커버(40)는 하면측이 개방되는 박스형태로 내부에 광섬유 변형률 센서(10) 및 양측 지지대(20, 30)가 수용되게 되며, 그 좌우 양측면상에는 광섬유 변형률 센서(10)의 광섬유(12)가 통과되도록 하기 위한 관통홈(40a)이 형성되고, 해당 보호커버(40)는 그 하단부측을 통해 구조물에 대해 고정볼트 등으로 취부 고정될 수 있다. The protective cover 40 has a box shape in which a lower side is opened, and the optical fiber strain sensor 10 and both support bases 20 and 30 are accommodated therein, and the optical fiber 12 of the optical fiber strain sensor 10 is disposed on both left and right sides thereof. The through hole 40a for passing through is formed, and the protective cover 40 may be fixed to the structure by fixing bolts or the like through the lower end side thereof.

이상, 상기 내용은 본 고안의 바람직한 일 실시예를 단지 예시한 것으로 본 고안의 당업자는 본 고안의 요지를 변경시킴이 없이 본 고안에 대한 수정과 변경을 가할 수 있음을 인지해야 한다.As described above, the above description merely illustrates a preferred embodiment of the present invention, and those skilled in the art should recognize that modifications and changes can be made to the present invention without changing the subject matter of the present invention.

본 고안에 따르면, 광섬유 변형률 센서에 대한 캘리브레이션을 매우 용이하고 신속하면서 정밀하게 실시할 수 있는 효과가 달성될 수 있다. According to the present invention, the effect of very easily, quickly and precisely calibrating the optical fiber strain sensor can be achieved.

Claims (5)

변형률을 측정하는 광섬유 변형률 센서와, An optical fiber strain sensor for measuring strain, 상기 광섬유 변형률 센서를 인장된 상태로 양측에서 고정하며 구조물에 대해 고정되는 한쌍의 지지대와, A pair of supports fixed to both sides of the optical fiber strain sensor in a tensioned state, and fixed to the structure; 상기 일측 지지대에서 상기 광섬유 변형률 센서의 고정 부위를 수평방향으로 이동시키기 위해 구비되는 수평이동수단을 포함하는 광섬유 변형률 센서 장치.Optical fiber strain sensor device comprising a horizontal movement means provided to move the fixed portion of the optical fiber strain sensor in the horizontal direction from the one side support. 제 1 항에 있어서, The method of claim 1, 상기 수평이동수단은, The horizontal moving means, 상기 일측 지지대를 이루도록 하부측에 구비되며 상기 구조물에 고정되는 하판과, A lower plate provided at a lower side to form the one support and fixed to the structure; 상기 일측 지지대를 이루도록 상기 하판상에서 수평 이동 가능하게 상부측에 구비되며 상기 광섬유 변형률 센서를 고정하는 상판과, An upper plate provided at an upper side to horizontally move on the lower plate so as to form the one support, and fixing the optical fiber strain sensor; 상기 하판에 대해 상기 상판을 밀거나 잡아당겨 이동시키는 이동조작수단으로 이루어지는 것을 특징으로 하는 광섬유 변형률 센서 장치.The optical fiber strain sensor device, characterized in that consisting of a movement operation means for pushing or pulling the upper plate relative to the lower plate. 제 2 항에 있어서, The method of claim 2, 상기 이동조작수단은, The movement operation means, 상기 상판측에 일단이 고정되고 상기 하판측에 대해 나사결합을 이루어 회전 작동되는 조절볼트인 것을 특징으로 하는 광섬유 변형률 센서 장치.One end is fixed to the upper plate side and the optical fiber strain sensor device, characterized in that the adjustment bolt is rotated by making a screw coupling to the lower plate side. 제 2 항에 있어서, The method of claim 2, 상기 상판과 상기 하판에는 서로 형합을 이루어 슬라이딩 이동을 직선으로 안내하기 위한 슬라이딩홈 및 슬라이딩돌기가 각기 구비되는 것을 특징으로 하는 광섬유 변형률 센서 장치.Optical fiber strain sensor device characterized in that the upper plate and the lower plate is formed with each other sliding grooves and sliding projections for guiding the sliding movement in a straight line to each other. 제 1 항에 있어서, The method of claim 1, 상기 광섬유 변형률 센서 및 상기 양측 지지대를 외측에서 덮어서 보호하도록 상기 구조물에 대해 고정되게 구비되는 보호커버를 더 포함하는 것을 특징으로 하는 광섬유 변형률 센서 장치.And a protective cover fixed to the structure to cover and protect the optical fiber strain sensor and the both supports from the outside.
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Cited By (7)

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KR100945290B1 (en) * 2009-11-27 2010-03-03 주식회사 위스코 Pipe and system detecting breakdown and leakage of pipe by fiber-optic calbe
CN102679900A (en) * 2012-05-18 2012-09-19 中国电子科技集团公司第四十一研究所 Method for calibrating strain parameters of optical fiber sensor and optical fiber grating
KR101314857B1 (en) * 2012-07-16 2013-10-04 한국철도기술연구원 Deformation measuring module and apparatus incorporating the same
CN103344192A (en) * 2013-06-27 2013-10-09 中国电子科技集团公司第四十一研究所 Long-distance large-range optical fiber strain generating device and generating method
CN107941163A (en) * 2017-12-22 2018-04-20 中国地质大学（武汉） A kind of fully distributed fiber coefficient of strain caliberating device and method
CN109612403A (en) * 2019-01-29 2019-04-12 广州大学 A kind of fiber Bragg grating strain sensor and its installation method
KR20210108008A (en) * 2020-02-25 2021-09-02 (주)카이센테크 Strain measuring apparatus with amplification function of optical fiber response

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100945290B1 (en) * 2009-11-27 2010-03-03 주식회사 위스코 Pipe and system detecting breakdown and leakage of pipe by fiber-optic calbe
CN102679900A (en) * 2012-05-18 2012-09-19 中国电子科技集团公司第四十一研究所 Method for calibrating strain parameters of optical fiber sensor and optical fiber grating
KR101314857B1 (en) * 2012-07-16 2013-10-04 한국철도기술연구원 Deformation measuring module and apparatus incorporating the same
CN103344192A (en) * 2013-06-27 2013-10-09 中国电子科技集团公司第四十一研究所 Long-distance large-range optical fiber strain generating device and generating method
CN107941163A (en) * 2017-12-22 2018-04-20 中国地质大学（武汉） A kind of fully distributed fiber coefficient of strain caliberating device and method
CN107941163B (en) * 2017-12-22 2019-07-23 中国地质大学（武汉） A kind of fully distributed fiber coefficient of strain caliberating device and method
CN109612403A (en) * 2019-01-29 2019-04-12 广州大学 A kind of fiber Bragg grating strain sensor and its installation method
KR20210108008A (en) * 2020-02-25 2021-09-02 (주)카이센테크 Strain measuring apparatus with amplification function of optical fiber response

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