KR20170008949A - Wire strand having optical fiber sensor and production method of thereof - Google Patents

Wire strand having optical fiber sensor and production method of thereof Download PDF

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KR20170008949A
KR20170008949A KR1020150100141A KR20150100141A KR20170008949A KR 20170008949 A KR20170008949 A KR 20170008949A KR 1020150100141 A KR1020150100141 A KR 1020150100141A KR 20150100141 A KR20150100141 A KR 20150100141A KR 20170008949 A KR20170008949 A KR 20170008949A
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sensor housing
sensor
optical fiber
injection port
hollow
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KR1020150100141A
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Korean (ko)
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KR101713190B1 (en
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김재민
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전남대학교산학협력단
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    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
    • D07B1/141—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising liquid, pasty or powder agents, e.g. lubricants or anti-corrosive oils or greases
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
    • D07B1/141—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising liquid, pasty or powder agents, e.g. lubricants or anti-corrosive oils or greases
    • D07B1/144—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising liquid, pasty or powder agents, e.g. lubricants or anti-corrosive oils or greases for cables or cable components built-up from metal wires
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
    • D07B1/145—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising elements for indicating or detecting the rope or cable status
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/02—Machine details; Auxiliary devices
    • D07B7/14—Machine details; Auxiliary devices for coating or wrapping ropes, cables, or component strands thereof
    • D07B7/145—Coating or filling-up interstices
    • 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
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0693—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a strand configuration
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2095—Auxiliary components, e.g. electric conductors or light guides
    • D07B2201/2096—Light guides
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2301/00—Controls
    • D07B2301/55—Sensors
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2301/00—Controls
    • D07B2301/55—Sensors
    • D07B2301/5504—Sensors characterised by their arrangement
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2301/00—Controls
    • D07B2301/55—Sensors
    • D07B2301/5531—Sensors using electric means or elements
    • D07B2301/5577—Sensors using electric means or elements using light guides
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2301/00—Controls
    • D07B2301/55—Sensors
    • D07B2301/5531—Sensors using electric means or elements
    • D07B2301/5595—Sensors using electric means or elements for force
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2015—Construction industries
    • D07B2501/203—Bridges

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Transform (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

According to the present invention, a composite strand having an optical fiber sensor includes: a sensor housing having a hollow structure extending in a longitudinal direction therein and formed on an outer surface thereof with an injection port so as to communicate with the hollow; a plurality of unit strands which are twisted around the sensor housing and coupled with the sensor housing; an optical fiber sensor installed in the hollow structure of the sensor housing and connected to a signal transmitting member installed in a tube; and a grouting material injected into the hollow structure through the injection port to fix the optical fiber sensor to the sensor housing. A plurality of the injection ports are formed to be spaced apart from each other in a longitudinal direction of the sensor housing. According to the present invention, in the composite strand having the optical fiber sensor and the method of fabricating the same, since the injection ports are provided in the longitudinal direction on the outer surface of the sensor housing and the grouting material is uniformly filled in the hollow structure of the sensor housing through the injection ports, the optical fiber sensor is securely fixed to the sensor housing to improve the accuracy of the measured value of the optical fiber sensor.

Description

광섬유 센서를 가진 복합강연선 및 이의 제조방법{Wire strand having optical fiber sensor and production method of thereof}Technical Field [0001] The present invention relates to a composite strand having an optical fiber sensor and a manufacturing method thereof,

본 발명은 광섬유 센서를 가진 복합강연선 및 이의 제조방법에 관한 것으로서, 더욱 상세하게는 교량, 콘크리트 구조물에 이용되는 복합 강연선의 변형을 검출할 수 있는 광섬유 센서를 가진 복합강연선 및 이의 제조방법에 관한 것이다. The present invention relates to a composite strand with an optical fiber sensor and a method of manufacturing the same, and more particularly, to a composite strand having an optical fiber sensor capable of detecting deformation of a composite strand used in a bridge and a concrete structure and a method of manufacturing the same. .

일반적으로 중요한 사회기반 시설물 중의 하나인 교량, 빌딩, 댐 등의 구조물은 지진, 태풍, 홍수 등 예상하지 못한 환경변화로 인하여 구조적인 손상을 받을 수 있으며, 이로부터 잔존 수명이 현저히 저하되거나 붕괴될 위험을 가질 수 있다. 이러한 점을 고려하여 최근에는 구조물의 손상과 열화 정도, 또는 구조적인 문제 판단 시 필요한 기초자료를 습득하기 위하여 구조물의 변형을 측정하기 위한 계측시스템이 도입되고 있다. Structures such as bridges, buildings, and dams, which are generally important social infrastructures, can suffer structural damage due to unexpected environmental changes such as earthquakes, typhoons, and floods, resulting in a significant decrease in life expectancy or collapse Lt; / RTI > In consideration of this, recently, a measuring system for measuring deformation of a structure has been introduced in order to acquire basic data necessary for determination of structural damage, deterioration degree, or structural problem.

이러한 구조물의 변형 또는 인장응력 등을 측정하기 위한 센서는 측정값의 신뢰성, 시공성, 내구성 등을 감안하여 광감도 센서, 간섭형 광섬유센서 및 광섬유 브래그 격자 센서(Fiber optic Bragg Grationg sensor)등과 같은 광섬유 센서가 주로 이용된다. The sensor for measuring the deformation or tensile stress of the structure is provided with a fiber optic sensor such as a photosensitivity sensor, an interference type optical fiber sensor and a fiber optic Bragg grating sensor in consideration of the reliability of the measured value, workability and durability It is mainly used.

국내 등록실용신안공보 제20-0350221호에는 장력측정용 광섬유센서가 개시되어 있다. 상기 장력측정용 광섬유센서는 한 쌍의 광섬유센서가 내부를 통해 삽입된 상태로 고착재에 의해 상기 광섬유센서의 양측이 일체로 고정되어짐과 함께 저면이 각각 증폭부의 상단에 부착 고정되는 한쌍의 고정편과, 상기 각 증폭부를 피측정물에 안정하게 고정하기위한 홈이 있고, 슬립방지 고정수단으로 이루어진다. Korean Registered Utility Model No. 20-0350221 discloses an optical fiber sensor for tension measurement. Wherein the optical fiber sensor for tension measurement has a pair of optical fiber sensors in which both sides of the optical fiber sensor are integrally fixed by a fixing material while a pair of optical fiber sensors are inserted through the inside thereof, And a groove for fixing each of the amplifying units to the object to be measured in a stable manner.

그러나, 상기 장력측정용 광섬유센서는 고착재가 고정편의 개방된 단부를 통해서만 주입되므로 고정편 내부에 고착재가 균일하게 충진되기 어려워 측정값의 정확도가 낮다는 단점이 있다. However, since the optical fiber sensor for tension measurement is injected only through the open end of the fixing member, the fixing member is not uniformly filled in the fixing member, resulting in a disadvantage in that the accuracy of the measured value is low.

본 발명은 상기와 같은 문제점을 개선하기 위한 것으로서, 광섬유 센서가 삽입되는 센서하우징의 중공에 그라우팅재를 균일하게 충진할 수 있는 광섬유센서를 가진 복합강연선 및 이의 제조방법을 제공하는 데 그 목적이 있다. It is an object of the present invention to provide a composite strand having an optical fiber sensor capable of uniformly filling a grouting material in a hollow of a sensor housing into which an optical fiber sensor is inserted and a method of manufacturing the same. .

상기의 목적을 달성하기 위한 광섬유센서를 가진 복합강연선은 내부에 길이방향으로 연장된 중공이 마련되고, 외주면에 상기 중공에 연통되게 주입구가 형성된 센서하우징과, 상기 센서하우징의 주위에 상호 꼬여 상기 센서하우징과 결합되는 다수의 단위 강연선과, 상기 센서하우징의 중공에 설치되는 광섬유센서와, 상기 센서하우징에 대해 상기 광섬유센서를 고정시킬 수 있도록 상기 주입구를 통해 상기 중공에 주입되는 그라우팅재;를 구비하고, 상기 주입구는 다수개가 상기 센서하우징의 길이방향을 따라 상호 이격되게 형성되어 있다. A composite strand having an optical fiber sensor for achieving the above object includes a sensor housing having a hollow extending in the longitudinal direction therein and having an injection port formed on an outer circumferential surface thereof so as to communicate with the hollow, A plurality of unit strands connected to the housing, an optical fiber sensor installed in the hollow of the sensor housing, and a grouting material injected into the hollow through the injection hole to fix the optical fiber sensor to the sensor housing And a plurality of the injection ports are spaced apart from each other along the longitudinal direction of the sensor housing.

이때, 상기 주입구는 상기 주입구에 인접된 위치의 상기 센서하우징에 응력집중이 발생되는 것을 저감시킬 수 있도록 상기 센서하우징의 길이방향 중심선에 대해 소정의 각도로 경사지게 형성된다. At this time, the injection port is formed to be inclined at a predetermined angle with respect to the longitudinal center line of the sensor housing so as to reduce occurrence of stress concentration in the sensor housing at a position adjacent to the injection port.

상기 주입구는 상기 주입구에 인접된 위치의 상기 센서하우징에 응력집중이 발생되는 것을 저감시킬 수 있도록 상기 센서하우징의 길이방향을 따라 연장된 폭이 상기 센서하우징의 길이방향에 대해 교차되는 방향으로 연장된 폭보다 큰 타원형으로 형성될 수도 있다. Wherein the injection port has a width extending along the longitudinal direction of the sensor housing and extending in a direction crossing the longitudinal direction of the sensor housing so as to reduce the occurrence of stress concentration in the sensor housing at a position adjacent to the injection port May be formed in an elliptical shape larger than the width.

한편, 본 발명에 따른 광섬유센서를 가진 복합강연선의 제조방법은 내부에 길이방향으로 중공이 형성된 센서하우징을 준비하는 준비단계와, 상기 중공이 형성된 상기 센서하우징 외주면에 상기 중공에 연통되도록 다수의 주입구를 길이방향을 따라 다수개 형성하는 주입구 형성단계와, 상기 센서하우징의 중공에 광섬유센서를 삽입하는 센서삽입단계와, 상기 센서삽입단계가 완료되면, 상기 주입구를 통해 상기 센서하우징의 중공으로 그라우팅 재를 주입하는 고정단계와, 상기 그라우팅 재의 주입이 완료되면 상기 센서하우징의 주위에 다수의 단위 강연선을 상호 꼬아 복합강연선을 제조하는 강연선 제조단계를 포함한다. A method of manufacturing a composite stranded wire having an optical fiber sensor according to the present invention includes the steps of preparing a sensor housing having a cavity formed therein in the longitudinal direction thereof and a plurality of injection openings formed on an outer circumferential surface of the sensor housing, A sensor inserting step of inserting an optical fiber sensor into the hollow of the sensor housing; and a step of inserting an optical fiber sensor into the hollow of the sensor housing through the injection port when the sensor inserting step is completed, And a strand manufacturing step of manufacturing a composite strand by twisting a plurality of unit strands around the sensor housing when the grouting material is completely injected.

상기 주입구 형성단계에서, 상기 주입구에 인접된 위치의 상기 센서하우징에 응력집중이 발생되는 것을 저감시킬 수 있도록 상기 주입구를 상기 센서하우징의 길이방향 중심선에 대해 소정의 각도로 경사지게 형성하는 것이 바람직하다. It is preferable that the injection port is formed to be inclined at a predetermined angle with respect to the longitudinal center line of the sensor housing so as to reduce the occurrence of stress concentration in the sensor housing at a position adjacent to the injection port.

또한, 상기 주입구 형성단계에서, 상기 주입구에 인접된 위치의 상기 센서하우징에 응력집중이 발생되는 것을 저감시킬 수 있도록 상기 주입구를 상기 센서하우징의 길이방향을 따라 연장된 폭이 상기 센서하우징의 길이방향에 대해 교차되는 방향으로 연장된 폭보다 큰 타원형으로 형성할 수도 있다. In addition, in order to reduce the occurrence of stress concentration in the sensor housing at a position adjacent to the injection port in the injection port forming step, the width of the injection port, which extends along the longitudinal direction of the sensor housing, May be formed to have an elliptical shape larger than the width extending in the direction intersecting with the direction perpendicular to the longitudinal direction.

본 발명에 따른 광섬유센서를 가진 복합강연선 및 이의 제조방법은 센서하우징의 외주면에 길이방향을 따라 다수의 주입구가 마련되어 상기 주입구를 통해 센서하우징의 중공에 균일하게 그라우팅재를 충진하므로 센서하우징에 광섬유센서가 견고하게 고정되어 광섬유센서의 측정값에 대한 정확도를 향상시킬 수 있는 장점이 있다. A composite strand with an optical fiber sensor and a method of manufacturing the same according to the present invention are characterized in that a plurality of injection holes are provided along the longitudinal direction on the outer circumferential surface of the sensor housing and the grouting material is uniformly filled in the hollow of the sensor housing through the injection hole, So that the accuracy of the measured value of the optical fiber sensor can be improved.

도 1은 본 발명에 따른 광섬유 센서를 가진 복합강연선이 설치된 교량을 나타내 보인 일부 절제 측면도이고,
도 2는 본 발명에 따른 광섬유 센서를 가진 복합강연선에 대한 사시도이고,
도 3은 본 발명에 따른 광섬유 센서를 가진 복합강연선에 대한 횡 단면도이고,
도 4는 본 발명에 따른 광섬유 센서를 가진 복합강연선의 센서하우징에 대한 단면도이고,
도 5는 본 발명의 또 다른 실시 예에 따른 광섬유 센서를 가진 복합강연선의 센서하우징에 대한 단면도이고,
도 6은 본 발명의 또 다른 실시 예에 따른 광섬유 센서를 가진 복합강연선의 센서하우징에 대한 단면도이다. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cut-away side view showing a bridge equipped with a composite strand with an optical fiber sensor according to the present invention,
2 is a perspective view of a composite strand with an optical fiber sensor according to the present invention,
3 is a cross-sectional view of a composite strand with an optical fiber sensor according to the present invention,
4 is a cross-sectional view of a composite strand with an optical fiber sensor according to the present invention,
5 is a cross-sectional view of a sensor housing of a composite strand with an optical fiber sensor according to another embodiment of the present invention,
6 is a cross-sectional view of a sensor housing of a composite strand with an optical fiber sensor according to another embodiment of the present invention.

이하, 첨부된 도면을 참조하여 본 발명에 따른 광섬유센서를 가진 복합강연선 및 이의 제조방법을 더욱 상세하게 설명하면 다음과 같다. Hereinafter, a composite strand with an optical fiber sensor according to the present invention and a method of manufacturing the same will be described in detail with reference to the accompanying drawings.

도 1 내지 도 4에는 본 발명에 다른 광섬유 센서를 가진 복합강연선(10)이 도시되어 있다. 1 to 4 show a composite strand 10 with an optical fiber sensor according to the present invention.

도면을 참조하면, 광섬유 센서를 가진 복합강연선(10)은 도 1에 도시된 바와 같이 교량(100)에 설치되는 복합 강연선 또는 콘크리트 구조물에 설치되는 것으로서, 내부에 길이방향으로 연장된 중공(21)이 마련되고, 외주면에 상기 중공(21)에 연통되게 주입구(22)가 형성된 센서하우징(20)과, 상기 센서하우징(20)의 주위에 상호 꼬여 상기 센서하우징(20)과 결합되는 다수의 단위 강연선(30)과, 상기 센서하우징(20)의 중공(21)에 설치된 광섬유 센서(40)와, 상기 센서하우징(20)에 대해 상기 광섬유 센서(40)를 고정시킬 수 있도록 상기 주입구(22)를 통해 상기 중공(21)에 주입되는 그라우팅재(50)를 구비한다. Referring to FIG. 1, a composite strand 10 having an optical fiber sensor is installed in a composite strand or a concrete structure installed in a bridge 100 as shown in FIG. 1, and includes a hollow 21 extending in the longitudinal direction, A sensor housing 20 having an outer circumferential surface formed with an injection port 22 communicating with the hollow 21 and a plurality of units 20 coupled to the sensor housing 20 around the sensor housing 20, The optical fiber sensor 40 includes a strand 30 and an optical fiber sensor 40 installed in the hollow 21 of the sensor housing 20. The optical fiber sensor 40 is fixed to the sensor housing 20 by the injection port 22, And a grouting material (50) injected into the hollow (21) through the grouting material (50).

센서하우징(20)은 복합 강연선의 코어를 이루는 것으로서, 내부에 길이방향으로 관통되게 중공(21)이 형성되어 있다. 상기 센서하우징(20)의 외주면에는 단위 강연선(30)의 변형력의 전달이 원활하게 이루어질 수 있도록 단위 강연선(30)의 접촉 궤적을 따라 복수의 그루브(23)가 형성되어 있다. 상기 그루브(23)는 단위 강연선(30)들의 외주면과 접촉면적을 넓힐 수 있도록 단위 강연선(30)의 외주면과 동일한 곡면을 갖도록 함이 바람직하다. The sensor housing 20 constitutes a core of a composite strand, and a hollow 21 is formed therein so as to penetrate in the longitudinal direction. A plurality of grooves 23 are formed on the outer circumferential surface of the sensor housing 20 along the contact trajectory of the unit strand 30 so that the strain of the unit strand 30 can be transmitted smoothly. It is preferable that the groove 23 has the same curved surface as the outer circumferential surface of the unit strand 30 so as to widen the contact area with the outer circumferential surface of the unit strand 30.

또한, 상기 센서하우징(20)은 외주면에 다수의 주입구(22)가 형성되어 있다. 상기 주입구(22)들은 센서하우징(20)의 중공(21)에 연통되도록 센서하우징(20)의 반경방향으로 연장되며, 센서하우징(20)의 길이방향을 따라 상호 이격되게 형성되어 있다. In addition, the sensor housing 20 has a plurality of injection ports 22 formed on the outer circumferential surface thereof. The injection ports 22 extend in the radial direction of the sensor housing 20 so as to communicate with the hollow 21 of the sensor housing 20 and are spaced from each other along the longitudinal direction of the sensor housing 20.

한편, 주입구(22)는 도 5를 참조하면, 상기 주입구(22)에 인접된 위치의 상기 센서하우징(20)에 응력집중이 발생되는 것을 저감시킬 수 있도록 상기 센서하우징(20)의 길이방향 중심선에 대해 소정의 각도로 경사지게 형성될 수도 있다. 5, in order to reduce the occurrence of stress concentration in the sensor housing 20 at a position adjacent to the injection port 22, the injection port 22 has a longitudinal center line < RTI ID = 0.0 > As shown in Fig.

이때, 도시된 예에서, 주입구(22)는 중공(21)에 인접된 일단부가 센서하우징(20)에 인접된 타단부보다 전방에 위치하도록 경사지게 형성된 구조를 설명하였으나, 주입구(22)는 도시된 예에 한정하는 것이 아니라 일단부가 타단부보다 후방에 위치하도록 경사지게 형성될 수도 있다. In the illustrated example, the injection port 22 has a structure in which one end adjacent to the hollow 21 is formed so as to be inclined so as to be located forward of the other end adjacent to the sensor housing 20, The present invention is not limited to this example, but may be formed so as to be inclined so that one end is positioned behind the other end.

한편, 도 6을 참조하면, 주입구(22)는 상기 주입구(22)에 인접된 위치의 상기 센서하우징(20)에 응력집중이 발생되는 것을 저감시킬 수 있도록 타원형으로 형성될 수 있다. 이때, 주입구(22)는 상기 센서하우징(20)의 길이방향을 따라 연장된 폭이 상기 센서하우징(20)의 길이방향에 대해 교차되는 방향으로 연장된 폭보다 큰 형상으로 형성되는 것이 바람직하다. Referring to FIG. 6, the injection port 22 may be formed in an elliptical shape to reduce the concentration of stress in the sensor housing 20 at a position adjacent to the injection port 22. The injection port 22 may be formed to have a width greater than a width of the sensor housing 20 extending in a longitudinal direction of the sensor housing 20 and greater than a width of the injection hole 22 extending in a direction crossing the longitudinal direction of the sensor housing 20.

또한, 도 7을 참조하면, 센서하우징(20)은 그루브(23)가 없는 원통형으로 형성될 수도 있다. 7, the sensor housing 20 may be formed in a cylindrical shape without the grooves 23. [

광섬유 센서(40)는 광섬유에 소정의 간격으로 격자 감지부(41)가 형성된 광섬유 브래그 격자센서이다. 상기 광섬유 센서(40)는 광원에 의해 광을 광섬유에 조사시킬 경우 브래그 조건에 맞는 파장 성분은 격자 감지부(41)에서 반사되고, 나머지 파장 성분은 그대로 통과하는 성질을 이용한 것으로, 반사되는 광 및 통과한 광을 광검출기(미도시)에서 측정하여 각종 물리량의 변화를 측정할 수 있다. 격자 감지부(41)에서 반사되는 광의 파장인 브래그 파장은 유효 굴절률과 격자 간격의 함수인데, 격자 감지부(41)의 간격이 온도나 하중 등의 외부 물리양에 의해 변경될 경우 격자 감지부(41)에서 반사되는 광의 파장인 브래그 파장 역시 변하게 되므로 브래그 파장의 변화를 정밀하게 측정하여 격자 감지부(41)에 가해진 미지의 물리량(온도, 변형률)을 계산할 수 있다. The optical fiber sensor 40 is an optical fiber Bragg grating sensor having a grating sensing part 41 formed at an interval in an optical fiber. When the optical fiber sensor 40 irradiates the optical fiber with light by the light source, the wavelength component corresponding to the Bragg condition is reflected by the lattice-sensing unit 41 and the remaining wavelength components pass through. It is possible to measure a change in various physical quantities by measuring the light that has passed through a photodetector (not shown). The Bragg wavelength, which is the wavelength of the light reflected by the grating sensing part 41, is a function of the effective refractive index and the lattice spacing. When the interval of the grating sensing part 41 is changed by external physical quantity such as temperature or load, The Bragg wavelength, which is the wavelength of the light reflected by the grating 41, is also changed. Therefore, the unknown physical quantity (temperature, strain) applied to the grating sensing unit 41 can be calculated by precisely measuring the change of the Bragg wavelength.

그라우팅재(50)는 센서하우징(20)에 대해 광섬유 센서(40)를 고정하여 센서하우징(20)의 변형량이 광섬유 센서(40)에 그대로 전달될 수 있게 하기 위한 것으로서, 에폭시가 사용된다. 이때, 그라우팅재(50)는 센서하우징(20)의 길이방향을 따라 형성된 다수의 주입구(22)를 통해 센서하우징(20)의 중공(21)으로 주입되므로 보다 균일하게 중공(21)에 충진되어 센서하우징(20)에 대해 광섬유 센서(40)를 견고하게 고정시킨다. 따라서, 본 발명에 따른 광섬유 센서(40)를 가진 복합강연선(10)은 광섬유 센서(40)의 측정값에 대한 정확도를 향상시킬 수 있는 장점이 있다. The grouting material 50 is used to fix the optical fiber sensor 40 to the sensor housing 20 so that the deformation amount of the sensor housing 20 can be directly transmitted to the optical fiber sensor 40. Epoxy is used. At this time, the grouting material 50 is injected into the hollow 21 of the sensor housing 20 through the plurality of injection holes 22 formed along the longitudinal direction of the sensor housing 20, so that the grouting material 50 is more uniformly filled in the hollow 21 Thereby firmly fixing the optical fiber sensor 40 to the sensor housing 20. [ Accordingly, the composite strand 10 having the optical fiber sensor 40 according to the present invention has an advantage of improving the accuracy with respect to the measured value of the optical fiber sensor 40.

한편, 본 발명에 따른 광섬유 센서를 가진 복합강연선(10)의 제조방법을 상세히 설명하면 다음과 같다. A method of manufacturing the composite strand 10 having the optical fiber sensor according to the present invention will now be described in detail.

상기 광섬유 센서를 가진 복합강연선(10)의 제조방법은 준비단계, 주입구 형성단계, 센서삽입단계, 고정단계 및 강연선 제조단계를 포함한다. The manufacturing method of the composite strand 10 having the optical fiber sensor includes a preparation step, an injection port forming step, a sensor inserting step, a fixing step and a strand manufacturing step.

준비단계는 내부에 길이방향으로 중공(21)이 형성된 센서하우징(20)을 준비하는 단계이다. 상기 센서하우징(20)은 인발 또는 압출성형하여 제조할 수 있다. The preparing step is a step of preparing the sensor housing 20 having the hollow 21 formed therein in the longitudinal direction. The sensor housing 20 can be manufactured by drawing or extrusion molding.

주입구 형성단계는 중공(21)이 형성된 센서하우징(20)의 외주면에 중공(21)에 연통되도록 다수의 주입구(22)를 형성하는 단계이다. 작업자는 드릴과 같은 천공장비를 사용하여 센서하우징(20)의 외주면에 다수의 주입구(22)를 형성한다. 이때, 상기 주입구(22)들은 센서하우징(20)의 길이방향을 따라 상호 이격되게 형성하는 것이 바람직하다. The injection port forming step is a step of forming a plurality of injection ports 22 so as to communicate with the hollow 21 on the outer circumferential surface of the sensor housing 20 in which the hollow 21 is formed. The operator forms a plurality of injection openings 22 on the outer circumferential surface of the sensor housing 20 by using a punching machine such as a drill. At this time, it is preferable that the injection ports 22 are formed to be spaced apart from each other along the longitudinal direction of the sensor housing 20.

또한, 도 5에 도시된 바와 같이 상기 주입구(22)에 인접된 위치의 상기 센서하우징(20)에 응력집중이 발생되는 것을 저감시킬 수 있도록 상기 주입구(22)를 상기 센서하우징(20)의 길이방향 중심선에 대해 소정의 각도로 경사지게 형성하거나 도 6에 도시된 바와 같이 상기 주입구(22)를 상기 센서하우징(20)의 길이방향을 따라 연장된 폭이 상기 센서하우징(20)의 길이방향에 대해 교차되는 방향으로 연장된 폭보다 큰 타원형으로 형성할 수도 있다. 5, in order to reduce the occurrence of stress concentration in the sensor housing 20 at a position adjacent to the injection port 22, the injection port 22 is formed in the sensor housing 20 so that the length of the sensor housing 20 6, the width of the injection port 22 along the longitudinal direction of the sensor housing 20 may be inclined with respect to the longitudinal centerline of the sensor housing 20, But may be formed in an elliptical shape larger than the width extending in the crossing direction.

센서삽입단계는 센서하우징(20)의 중공(21)에 광섬유 센서(40)를 삽입하는 단계이다. The sensor inserting step is a step of inserting the optical fiber sensor 40 into the hollow 21 of the sensor housing 20.

고정단계는 센서삽입단계가 완료되면, 센서하우징(20)의 주입구(22)를 통해 중공(21)에 그라우팅재(50)를 주입하는 단계이다. 이때, 주입구(22)는 다수개가 센서하우징(20)의 길이방향을 따라 배열되어 있으므로 주입구(22)를 통해 주입된 그라우팅재(50)는 센서하우징(20)의 중공(21)에 균일하게 충진된다. 센서하우징(20)의 중공(21)에 그라우팅재(50)가 충진되면 소정시간동안 경과시켜 상기 그라우팅재(50)를 경화시킨다. The fixing step is a step of injecting the grouting material 50 into the hollow 21 through the injection port 22 of the sensor housing 20 when the sensor inserting step is completed. The grouting material 50 injected through the injection port 22 is uniformly filled in the hollow 21 of the sensor housing 20 because a plurality of the injection ports 22 are arranged along the longitudinal direction of the sensor housing 20. [ do. When the hollow space 21 of the sensor housing 20 is filled with the grouting material 50, the grouting material 50 is cured by a predetermined period of time.

강연선 제조단계는 그라우팅재(50)의 주입이 완료되면 센서하우징(20)의 주위에 다수의 단위 강연선(30)을 상호 꼬아 복합강연선(10)을 제조하는 단계이다. The strand manufacturing step is a step of manufacturing a composite strand 10 by twisting a plurality of unit strands 30 around the sensor housing 20 after the grouting material 50 is injected.

본 발명은 도면에 도시된 실시 예를 참고로 설명되었으나 이는 예시적인 것에 불과하며 당해 기술분야에서 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 실시 예가 가능하다는 점을 이해할 것이다. While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

따라서 본 발명의 진정한 보호 범위는 첨부된 청구범위에 의해서만 정해져야 할 것이다. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

10: 광섬유 센서를 가진 복합강연선
20: 센서하우징
21: 중공
22: 주입구
23: 그루브
30: 단위 강연선
40: 광섬유 센서
41: 격자 감지부
50: 그라우팅재10: Composite strand with fiber optic sensor
20: Sensor housing
21: hollow
22: inlet
23: Groove
30: Unit strand
40: Fiber Optic Sensor
41: Grating sensing unit
50: Grouting material

Claims (6)

내부에 길이방향으로 연장된 중공이 마련되고, 외주면에 상기 중공에 연통되게 주입구가 형성된 센서하우징과;
상기 센서하우징의 주위에 상호 꼬여 상기 센서하우징과 결합되는 다수의 단위 강연선과;
상기 센서하우징의 중공에 설치되는 광섬유센서와;
상기 센서하우징에 대해 상기 광섬유센서를 고정시킬 수 있도록 상기 주입구를 통해 상기 중공에 주입되는 그라우팅재;를 구비하고,
상기 주입구는 다수개가 상기 센서하우징의 길이방향을 따라 상호 이격되게 형성된 것을 특징으로 하는 광섬유센서를 가진 복합강연선.
A sensor housing having a hollow extending in a longitudinal direction therein and having an injection port formed on an outer circumferential surface thereof so as to communicate with the hollow;
A plurality of unit strands that are twisted around the sensor housing and coupled with the sensor housing;
An optical fiber sensor installed in the hollow of the sensor housing;
And a grouting material injected into the hollow through the injection port to fix the optical fiber sensor to the sensor housing,
Wherein a plurality of the injection ports are formed to be spaced apart from each other along the longitudinal direction of the sensor housing.
제1항에 있어서,
상기 주입구는 상기 주입구에 인접된 위치의 상기 센서하우징에 응력집중이 발생되는 것을 저감시킬 수 있도록 상기 센서하우징의 길이방향 중심선에 대해 소정의 각도로 경사지게 형성된 것을 특징으로 하는 광섬유센서를 가진 복합강연선.
The method according to claim 1,
Wherein the injection port is inclined at a predetermined angle with respect to the longitudinal centerline of the sensor housing so as to reduce the occurrence of stress concentration in the sensor housing at a position adjacent to the injection port.
제1항 또는 제2항에 있어서,
상기 주입구는 상기 주입구에 인접된 위치의 상기 센서하우징에 응력집중이 발생되는 것을 저감시킬 수 있도록 상기 센서하우징의 길이방향을 따라 연장된 폭이 상기 센서하우징의 길이방향에 대해 교차되는 방향으로 연장된 폭보다 큰 타원형으로 형성된 것을 특징으로 하는 광섬유센서를 가진 복합강연선.
3. The method according to claim 1 or 2,
Wherein the injection port has a width extending along the longitudinal direction of the sensor housing and extending in a direction crossing the longitudinal direction of the sensor housing so as to reduce the occurrence of stress concentration in the sensor housing at a position adjacent to the injection port Wherein the fiber strand has an elliptical shape larger than the width of the fiber strand.
내부에 길이방향으로 중공이 형성된 센서하우징을 준비하는 준비단계와;
상기 중공이 형성된 상기 센서하우징 외주면에 상기 중공에 연통되도록 다수의 주입구를 길이방향을 따라 다수개 형성하는 주입구 형성단계와;
상기 센서하우징의 중공에 광섬유센서를 삽입하는 센서삽입단계와;
상기 센서삽입단계가 완료되면, 상기 주입구를 통해 상기 센서하우징의 중공으로 그라우팅 재를 주입하는 고정단계와;
상기 그라우팅 재의 주입이 완료되면 상기 센서하우징의 주위에 다수의 단위 강연선을 상호 꼬아 복합강연선을 제조하는 강연선 제조단계를 포함하는 것을 특징으로 하는 광섬유센서를 가진 복합강연선의 제조방법.
Preparing a sensor housing having a hollow in the longitudinal direction therein;
An injection port forming step of forming a plurality of injection ports in the longitudinal direction so as to communicate with the hollow on the outer circumferential surface of the sensor housing where the hollow is formed;
A sensor inserting step of inserting an optical fiber sensor into the hollow of the sensor housing;
A fixing step of injecting a grouting material into the hollow of the sensor housing through the injection port when the sensor inserting step is completed;
And forming a composite strand by twisting a plurality of unit strands around the sensor housing when injection of the grouting material is completed.
제4항에 있어서,
상기 주입구 형성단계에서, 상기 주입구에 인접된 위치의 상기 센서하우징에 응력집중이 발생되는 것을 저감시킬 수 있도록 상기 주입구를 상기 센서하우징의 길이방향 중심선에 대해 소정의 각도로 경사지게 형성하는 것을 특징으로 하는 광섬유센서를 가진 복합강연선의 제조방법.
5. The method of claim 4,
Wherein the injection port is formed to be inclined at a predetermined angle with respect to the longitudinal center line of the sensor housing so as to reduce occurrence of stress concentration in the sensor housing at a position adjacent to the injection port in the injection port forming step Fabrication method of composite strand with optical fiber sensor.
제4항 또는 제5항에 있어서,
상기 주입구 형성단계에서, 상기 주입구에 인접된 위치의 상기 센서하우징에 응력집중이 발생되는 것을 저감시킬 수 있도록 상기 주입구를 상기 센서하우징의 길이방향을 따라 연장된 폭이 상기 센서하우징의 길이방향에 대해 교차되는 방향으로 연장된 폭보다 큰 타원형으로 형성하는 것을 특징으로 하는 광섬유센서를 가진 복합강연선의 제조방법.


The method according to claim 4 or 5,
The width of the injection port along the longitudinal direction of the sensor housing is set to be larger than the width of the sensor housing in the longitudinal direction of the sensor housing so as to reduce the occurrence of stress concentration in the sensor housing at a position adjacent to the injection port. And wherein the optical fiber sensor is formed in an elliptical shape larger than a width extending in a crossing direction.


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Citations (4)

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Publication number Priority date Publication date Assignee Title
KR20090123347A (en) * 2008-05-27 2009-12-02 전남대학교산학협력단 Wire strand having sensor unit and production method of thereof
KR20100090160A (en) * 2009-02-05 2010-08-13 한국과학기술원 Wire cable having sensor unit and manufacturing method of the same
KR20120097270A (en) * 2011-02-24 2012-09-03 주식회사 데크 Apparatus for fixing senser and method thereof
KR101408954B1 (en) * 2012-10-22 2014-06-19 (주)카이센 Device for sensing the strain of structure steel strand and sensing system with the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090123347A (en) * 2008-05-27 2009-12-02 전남대학교산학협력단 Wire strand having sensor unit and production method of thereof
KR20100090160A (en) * 2009-02-05 2010-08-13 한국과학기술원 Wire cable having sensor unit and manufacturing method of the same
KR20120097270A (en) * 2011-02-24 2012-09-03 주식회사 데크 Apparatus for fixing senser and method thereof
KR101408954B1 (en) * 2012-10-22 2014-06-19 (주)카이센 Device for sensing the strain of structure steel strand and sensing system with the same

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