KR101780703B1 - Fixation adhesive injection device for a tube mounted within the optical fiber sensor and method to mount fiber optic sensor in tube - Google Patents
Fixation adhesive injection device for a tube mounted within the optical fiber sensor and method to mount fiber optic sensor in tube Download PDFInfo
- Publication number
- KR101780703B1 KR101780703B1 KR1020150125843A KR20150125843A KR101780703B1 KR 101780703 B1 KR101780703 B1 KR 101780703B1 KR 1020150125843 A KR1020150125843 A KR 1020150125843A KR 20150125843 A KR20150125843 A KR 20150125843A KR 101780703 B1 KR101780703 B1 KR 101780703B1
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- South Korea
- Prior art keywords
- optical fiber
- tube
- fiber sensor
- housing
- injection
- Prior art date
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C7/00—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work
- B05C7/02—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work the liquid or other fluent material being projected
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Optical Transform (AREA)
Abstract
The present invention relates to a fixing material injecting apparatus for mounting an optical fiber sensor in a tube and a method of mounting an optical fiber sensor in the tube using the same, wherein the fixing material injecting apparatus for mounting an optical fiber sensor in the tube has a hollow The optical fiber sensor is inserted into the communication space so that the optical fiber sensor can be inserted into the hollow of the tube through the communication space. An injection unit installed in the housing and injecting a fixing material into the communication space; a plurality of optical fiber sensors, which are fixed to the optical fiber sensor so as to be spaced apart from each other in the longitudinal direction, and are inserted into the hollow of the tube together with the optical fiber sensor A plurality of injection members for forcibly transferring the fixing material in the communication space into the tube Respectively.
A fixing material injecting apparatus for mounting an optical fiber sensor in a tube and a method of mounting an optical fiber sensor in the tube using the same according to the present invention are characterized in that a plurality of injection members installed in an optical fiber sensor are fed into a tube together with an optical fiber sensor, The optical fiber sensor is firmly fixed to the tube by filling the hollow of the tube uniformly with the fixing material, thereby improving the accuracy of the measured value of the optical fiber sensor. In addition, since the fastening material can be rapidly filled into the hollow wire before the solidification of the fixture, the length of the composite strand can be remarkably increased.
Description
The present invention relates to a fixing material injecting apparatus for mounting an optical fiber sensor in a tube and a method of mounting an optical fiber sensor in the tube using the same, and more particularly, to an optical fiber sensor capable of detecting deformation of a composite strand used in a concrete structure And a method of mounting an optical fiber sensor in a tube using the same.
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 > Recently, a measurement system is being introduced to measure the strain of a structure in order to acquire the basic data necessary for determination of structural damage, deterioration degree, or structural problem.
In order to measure the strain, stress, etc. of the structure, a sensor such as Brillouin Optical Time Domain Reflectometry (BOTDR), Brillouin Optical Time Domain Analysis (BOTDA), photosensitivity sensor, interference optical fiber sensor And a fiber optic Bragg grating sensor are mainly used.
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.
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 that the accuracy of the measured value is low.
Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a fixation material injection device for mounting an optical fiber sensor in a tube capable of uniformly filling a fixture into a tube of a composite strand, And the like.
In order to accomplish the above object, according to the present invention, there is provided an apparatus for injecting fixation material for mounting an optical fiber sensor in a tube, wherein a tube having a hollow therein is coupled to one end of the tube and a communication space communicating with the hollow of the tube is provided therein A housing having an inlet through which the optical fiber sensor is inserted into the communication space so that the optical fiber sensor can be inserted into the hollow of the tube through the communication space at the other end, and a fixing member installed in the housing to inject the fixing material into the communication space. A plurality of injection members fixed to the optical fiber sensor so as to be spaced apart from each other along the longitudinal direction and being drawn into the hollow of the tube together with the optical fiber sensor to forcibly feed the fixing material of the communication space into the tube, Respectively.
The injection member is formed to have an outer diameter corresponding to the inner diameter of the tube so as to prevent the backflow of the fixing material injected into the hollow of the tube.
According to another aspect of the present invention, there is provided a fixation material injection apparatus for mounting an optical fiber sensor in a tube, the fixation material injection apparatus being formed at the other end of the housing and extending in a direction away from the housing to guide the injection member into the housing, And may further include a guide portion formed to increase its inner diameter as it gets further away from the housing.
The injection member may include a pressure plate formed with a first through-hole through which the optical fiber sensor passes, an outer diameter corresponding to an inner diameter of the tube, And a fixing block fixed to the optical fiber sensor such that a front surface thereof is in close contact with a rear surface of the pressure plate.
Wherein the injection member includes a main tube having a second through-hole through which the optical fiber sensor passes, an extension plate extending in a direction in which an outer diameter of the end portion of the main tube is extended to contact an inner wall surface of the tube, A second extension skirt extending rearward from an edge of the extension plate with reference to an injection direction of the optical fiber sensor and an adhesive layer formed by applying an adhesive to the inner surface of the main pipe so that the main pipe can be adhered to the optical fiber sensor .
A method of mounting an optical fiber sensor in a tube according to the present invention comprises the steps of preparing a housing provided with a communication space in which a fixing material can be filled, A step of inserting the tube into the tube, a step of installing a connecting wire to penetrate the housing and the tube, a step of inserting the fixing material of the communication space into the tube when the optical fiber sensor is drawn into the tube, A plurality of injection members arranged along the longitudinal direction of the optical fiber sensor mounted on the inside of the tube so as to be able to carry the plurality of injection wires; A fixing step of fixing one end of the optical fiber sensor provided with the injection member; And a mounting step of applying a pulling force to the optical fiber sensor through the connecting wire so that the optical fiber sensor can be drawn into the tube through the housing do.
According to another aspect of the present invention, there is provided an optical fiber sensor comprising: a core having a predetermined length; an optical fiber body formed to surround an outer circumferential surface of the core; At least one pulling wire. ,
The pulling wire preferably extends longer than the length of the core so that an end portion of the pulling wire can protrude to the outside of the optical fiber body so that the pulling force can be applied by an operator.
A fixing material injecting apparatus for mounting an optical fiber sensor in a tube and a method of mounting an optical fiber sensor in the tube using the same according to the present invention are characterized in that a plurality of injection members installed in an optical fiber sensor are fed into a tube together with an optical fiber sensor, The optical fiber sensor can be firmly fixed to the tube by filling the hollow of the tube uniformly with the fixing material, thereby improving the accuracy of the measured value of the optical fiber sensor and increasing the production length of the composite stranded wire compared to the conventional manufacturing method .
1 is a side view showing a bridge in which a composite strand having an optical fiber sensor is installed,
FIG. 2 is a partially cutaway perspective view of a superposed wedge with the optical fiber sensor of FIG. 1,
3 is a perspective view of a fixing material injection apparatus for mounting an optical fiber sensor in a tube according to the present invention,
4 is a perspective view of a fixing material injection apparatus for mounting an optical fiber sensor in a tube according to another embodiment of the present invention,
5 is a perspective view of a fixing material injection apparatus for mounting an optical fiber sensor in a tube according to another embodiment of the present invention,
6 is a partially cutaway perspective view of an optical fiber sensor according to the present invention.
Hereinafter, a fixing material injecting apparatus for mounting an optical fiber sensor in a tube according to the present invention and a method for mounting an optical fiber sensor in the tube using the same will be described in detail with reference to the accompanying drawings.
FIG. 1 and FIG. 2 show a composite strand mounted with a tube manufactured by a fixing material injecting apparatus for mounting an optical fiber sensor in a tube according to the present invention.
Referring to the drawing, a composite strand is installed in a composite strand or a concrete structure installed in a
The
The
On the other hand, Brillouin Optical Time Domain Reflectometry (BOTDR) has a Brillouin frequency as its own property, and Brillouin frequency changes or shifts depending on the strain or temperature applied to the optical fiber do. The BOTDR unit senses the Brillouin frequency shift, which varies with the deformation or temperature acting on the fiber from the outside. In other words, since the Brillouin frequency of the optical fiber shifts, that is, the Brillouin frequency is shifted according to the deformation or temperature acting from the outside, the magnitude of the rear scattered light changes, so that the magnitude and the physical quantity externally acting by the Brillouin frequency shift One point can be grasped.
The Brillouin optical time domain analysis (BOTDA) is a measurement method using Brillouin scattering with varying frequency of scattered light. Since it is a distributed optical fiber sensor system, physical quantities around the optical fiber can be measured at every position of a single optical fiber. Brillouin scattering is a phenomenon in which light interacts with a sound generated in a material and scatters at a frequency different from the frequency of the incident light. Such a frequency change is called Brillouin frequency change. This frequency change depends not only on the material of the optical fiber but also on the strain applied to the optical fiber and the ambient temperature.
BOTDA arranges a pulse light source and a CW light source at both ends of the measured optical fiber, and receives pulse light at one end of the optical fiber and CW light at the other end of the optical fiber. At this time, if the optical frequency of the pulsed light source and the CW light source are adjusted so that the frequency difference between the pulsed light frequency and the CW light frequency coincides with the intrinsic Brillouin transition frequency of the measured optical fiber, the pulsed light is converted into CW light by the stimulated Brillouin scattering And the CW light is subjected to Brillouin optical amplification in the measured optical fiber. That is, if the frequency difference between the pulsed light and the CW light is brought close to the original Brillouin transition frequency of the optical fiber, induced Brillouin scattering occurs. The optical fiber Brillouin transition frequency has a characteristic of fluctuating according to an external physical quantity, that is, a strain or a temperature. Therefore, if an external influence is applied to a specific position of the optical fiber, the induced Brillouin scattering at that position has different values. In addition, since pulse light is used, the scattered light signal after the return is analyzed temporally, so that the deformation information of the optical fiber can be known.
The
3, a fixing
The
Although not shown in the drawings, the
The
The
The injection unit 120 includes a
The
A plurality of
4, an
Elements having the same functions as those in the previous drawings are denoted by the same reference numerals.
Referring to the drawing, the
The first through
The
The above-described
The fixed
5, an
Referring to the drawing, the
The
The
The second extending
The operator inserts the
A method of mounting the
A method for mounting an optical fiber sensor in a tube according to the present invention includes a preparation step, a tube installation step, a wire installation step, a injection member installation step, a fixing step, an injection step, and a mounting step.
The preparation step is a step of preparing the
The tube installation step is to install the
The wire installation step is a step of installing a connection wire (not shown) so as to penetrate through the
The injection member may be installed in the
The fixing step is a step of fixing the front end of the
The injecting step is a step of injecting the fixing
The mounting step is a step of applying a pulling force to the
The method for mounting the
6 shows an
The
The
The clad 164 is formed so as to surround the outer circumferential surface of the
The pulling
In the illustrated example, the structure in which the two pulling
The operator applies a pulling force to the
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.
Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.
100: Fixing material injection device for mounting an optical fiber sensor in a tube
110: Housing
111: communicating space
112: Inlet
113: Mounting hole
114: Connector
115: guide portion
120: injection unit
121: Storage tank
122: supply pipe
123: Feed pump
124: opening / closing valve
125:
130: injection member
Claims (8)
An injection unit installed in the housing and injecting a fixing material into the communication space;
And a plurality of injection members fixed to the optical fiber sensor so as to be spaced apart from each other along the longitudinal direction and being forced into the hollow of the tube together with the optical fiber sensor to forcibly feed the fixing material of the communication space into the tube A fixation material injection device for mounting an optical fiber sensor in a tube.
Wherein the injection member is formed to have an outer diameter corresponding to an inner diameter of the tube so as to prevent a backflow of the fixing material injected into the hollow of the tube.
And a guide portion formed at the other end of the housing and extending in a direction away from the housing so as to guide the injection member into the housing, wherein the guide portion is formed so that the inner diameter increases with distance from the housing A fixation material injection device for mounting an optical fiber sensor in a tube.
The injection member
A pressure plate formed to have a first through-hole through which the optical fiber sensor passes, an outer diameter corresponding to an inner diameter of the tube,
A first extending skirt extending rearward from an edge of the pressing plate with respect to an injection direction of the optical fiber sensor,
And a fixing block fixed to the optical fiber sensor such that a front surface thereof is in close contact with a rear surface of the pressure plate.
The injection member
A main tube having a second through-hole through which the optical fiber sensor passes,
An extension plate extending in a direction in which an outer diameter of the main tube extends to an end of the main tube so that an end thereof abuts an inner wall surface of the tube;
A second extension skirt extending rearward from an edge of the extension plate with respect to an injection direction of the optical fiber sensor,
And an adhesive layer formed by applying an adhesive to an inner surface of the main tube so that the main tube can be adhered to the optical fiber sensor.
A tube installing step of installing the tube at one end of the housing so that a hollow of the tube communicates with the communication space;
A wire installation step of installing a connection wire through the housing and the tube;
A plurality of injection members are provided along the longitudinal direction of the optical fiber sensor so that the fixing material in the communication space can be forcedly transferred into the tube when the optical fiber sensor is drawn into the tube;
A fixing step of fixing one end of the optical fiber sensor provided with the injection member to one end of the connection wire projected through an inlet formed at the other end of the housing;
An injection step of injecting a fixing material into the communication space of the housing when the fixing step is completed;
And applying a pulling force to the optical fiber sensor through the connecting wire so that the optical fiber sensor can be drawn into the tube through the housing.
An optical fiber body provided with a clad extending around the outer circumferential surface of the core;
And at least one pulling wire fixed to the clad so as to be movable together with the optical fiber body and extending in the longitudinal direction of the core.
Wherein the pulling wire extends longer than a length of the core so that an end portion of the pulling wire can protrude out of the optical fiber body so that the pulling force can be applied by an operator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150125843A KR101780703B1 (en) | 2015-09-04 | 2015-09-04 | Fixation adhesive injection device for a tube mounted within the optical fiber sensor and method to mount fiber optic sensor in tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150125843A KR101780703B1 (en) | 2015-09-04 | 2015-09-04 | Fixation adhesive injection device for a tube mounted within the optical fiber sensor and method to mount fiber optic sensor in tube |
Publications (2)
Publication Number | Publication Date |
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KR20170029085A KR20170029085A (en) | 2017-03-15 |
KR101780703B1 true KR101780703B1 (en) | 2017-09-22 |
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Application Number | Title | Priority Date | Filing Date |
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KR1020150125843A KR101780703B1 (en) | 2015-09-04 | 2015-09-04 | Fixation adhesive injection device for a tube mounted within the optical fiber sensor and method to mount fiber optic sensor in tube |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102197696B1 (en) * | 2019-12-24 | 2021-01-04 | 한국건설기술연구원 | Structure health monitoring system using optic fiber-based hybrid nerve network sensor, and method for the same |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004309981A (en) | 2003-04-10 | 2004-11-04 | Sumitomo Electric Ind Ltd | Waterproof terminal structure for optical cable |
JP2005076388A (en) | 2003-09-03 | 2005-03-24 | Tokyo Seiko Co Ltd | Terminal fixing method and terminal fixing body of high strength fiber composite material cable |
-
2015
- 2015-09-04 KR KR1020150125843A patent/KR101780703B1/en not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004309981A (en) | 2003-04-10 | 2004-11-04 | Sumitomo Electric Ind Ltd | Waterproof terminal structure for optical cable |
JP2005076388A (en) | 2003-09-03 | 2005-03-24 | Tokyo Seiko Co Ltd | Terminal fixing method and terminal fixing body of high strength fiber composite material cable |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102197696B1 (en) * | 2019-12-24 | 2021-01-04 | 한국건설기술연구원 | Structure health monitoring system using optic fiber-based hybrid nerve network sensor, and method for the same |
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KR20170029085A (en) | 2017-03-15 |
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