KR20190131995A - Method for manufacturing carbon fiber plate of fiber optic sensor-embedded type - Google Patents

Abstract

Provided is a method for manufacturing a carbon fiber plate embedded with an optical fiber sensor, capable of completely attaching an optical fiber sensor to a carbon fiber plate by embedding the optical fiber sensor in the carbon fiber plate and integrally forming the same in a process of manufacturing the carbon fiber plate when manufacturing the carbon fiber plate on which a plurality of carbon fiber sheets are stacked to repair and reinforce a structure, preventing external physical damage to the optical fiber sensor, easily evaluating reinforcement history of the structure and whether the carbon fiber plate is attached by embedding the optical fiber sensor in the carbon fiber plate and integrally forming the same, and improving field constructability by securing the consistent product quality by manufacturing the carbon fiber plate in a carbon fiber plate manufacturing factory.

Description

Manufacturing method of embedded fiber optic plate with fiber optic sensor {METHOD FOR MANUFACTURING CARBON FIBER PLATE OF FIBER OPTIC SENSOR-EMBEDDED TYPE}

The present invention relates to a method of manufacturing a carbon fiber plate, and more specifically, in the case of manufacturing a carbon fiber plate (Carbon Fiber Plate) laminated a plurality of carbon fiber sheets (Carbon Fiber Sheet) for repair and reinforcement of the structure, The present invention relates to a fabrication method of embedding a fiber optic sensor (FOS) in a carbon fiber plate to measure the behavior of the carbon fiber.

In general, carbon fiber is a petrochemical product that has been used in various ways, and has been researched and developed as a reinforcement material for civil engineering and building structures by using a property in which tensile strength is more than 10 times that of steel.

These carbon fibers include a pitch system made by narrowing the pitch produced through narrow and thin nozzles, and a polyacrylonitrile (PAN) system which is carbonized by baking polyacrylonitrile fibers. The scope of application extends to civil engineering and civil engineering. For example, in the field of construction and civil engineering, carbon fiber reinforced cement composites (CFRC), carbon fiber reinforced cement composites (CFRC), and carbon fiber Rennemor, It is used as such short fibers.

The structure reinforcement method using carbon fiber is a synthetic structured method in which a high-strength carbon fiber sheet is bonded to a concrete surface instead of an iron plate, which has been mainly used as a reinforcement material. It is a repairing and reinforcing method that can reinforce the strength, durability and seismic performance of the structure by adhering the carbon fiber sheet arranged to the concrete cross section which lacks structural strength using room temperature curing type epoxy resin.

In the case of the structure reinforcing method using the carbon fiber, since the carbon fiber sheet is arranged in one direction, the carbon fiber sheet is excellent in strength and elastic properties, and also uses carbon fiber having 1/4 weight of iron, It hardly affects the weight of the structure. In addition, since it is a composite reinforcement consisting of only a carbon fiber sheet and epoxy resin, it is possible to expect a waterproof effect of the resin without corrosion or deterioration caused by external air influences such as water, base, acid, and ultraviolet light.

1 is a view illustrating the reinforcement by attaching the carbon fiber sheet to the surface of the structure, Figure 2 is a flow chart of the carbon fiber reinforcement method using the carbon fiber sheet.

As shown in Figure 1, according to the structure reinforcement method using the carbon fiber, is used for bending reinforcement and shear reinforcement of the structure 10, for example, significantly reduced the flexural strength lacking by attaching reinforcement to the tension side of the reinforced concrete structure Can be promoted. In addition, the reinforcing surface by the attachment of the carbon fiber sheet 20 will have a superior wear resistance than the existing concrete surface, and the carbon fiber plate (on the crack surface of the concrete surface caused by fatigue, impact, high load, etc.) By reinforcing 20), the strength of the structure 10 can be restored, and the activity of the crack can be suppressed and maintained.

1 and 2, the carbon fiber reinforcement method using the carbon fiber sheet first repairs cracks in the structure to be reinforced first before reinforcing the carbon fiber sheet 20 (S11). Next, for example, using the disk grinder surface treatment of the structure to be reinforced 10 (S12), and then applying a primer to the surface of the structure to be reinforced 10 (S13).

Next, planarize the surface of the structure 10 to be reinforced with epoxy putty (S14). Then, the epoxy resin is applied to the surface of the structure to be reinforced 10 (S15). Next, the carbon fiber sheet 20 is bonded to the surface of the structure to be reinforced 10 (S16). For example, the release sheet of the carbon fiber sheet 20 is peeled off and bonded to the surface of the structure 10 to reinforce the attachment surface.

Next, air in the carbon fiber sheet 20 is removed using a bubble removing roller (S17). Next, to apply the epoxy resin for the finish (S18), after that, the resin of the remaining portion of the structure 10 to be attached to the carbon fiber sheet 20 is removed and the surface is finished (S19).

However, in the carbon fiber reinforcement method according to the related art, tens of thousands of carbon fibers are gathered in the carbon fiber sheet 20 having a very thin thickness due to the internal structure of the carbon fiber sheet 20, so that a high viscosity epoxy resin is carbon fiber. Since the sheet is difficult to be impregnated, there was a problem that the carbon fiber sheet 20 is lifted even after the carbon fiber sheet 20 is attached. Accordingly, when a low viscosity epoxy resin is used, gravity is prevented even before the carbon fiber sheet 20 is attached. Thereby, there was a problem in that uniform adhesion was difficult because the epoxy resin flowed downward.

In addition, after the carbon fiber sheet 20 is attached, the epoxy resin is applied again, and then pressed with a roller, whereby a part of the carbon fiber sheet 20 may be delaminated, and an epoxy resin may be formed on the roller. There was a problem in arranging the surface by question, and also, because the vinyl sheet to be installed when curing does not touch the epoxy resin, there was a problem that such a vinyl sheet is not easy to install.

On the other hand, as a prior art for solving the above problems, the Republic of Korea Patent Publication No. 2008-0078766 discloses the invention named "carbon fiber reinforcement method using a high-strength bolt", carbon used as a reinforcement of the concrete structure To prevent the fiber sheet from falling off and frequent lifting of the epoxy, tighten the high tension bolt with wire mesh installed on the ground surface of the grindered concrete, and then plaster it with epoxy to the protrusion of the high tension bolt. After going through the process, the carbon fiber sheet is constructed to prevent the lifting of the carbon fiber sheet due to gravity, vibration or external impact through the solid construction to finish the epoxy treatment.

Meanwhile, when the carbon fiber sheet is laminated and used as a carbon fiber plate, as described above, epoxy resin is used to attach the carbon fiber plate, but due to various reasons, peeling or breaking at the attachment interface, which is an epoxy layer, is caused by various reasons. Is occurring.

Such peeling or breaking of the carbon fiber plate attachment interface causes a significant decrease in strength of the reinforcing structure, but there is no suitable means for checking and judging it.

Accordingly, there have been attempts to bury the sensor to measure the adhesion of the carbon fiber plate or carbon fiber sheet, but due to problems in the manufacturing process of the carbon fiber plate that is cured and manufactured in an environment of high temperature or high pressure, the inside of the carbon fiber plate It is difficult to bury the sensor in the situation.

In addition, after the carbon fiber plate reinforcement may be installed in the field to check the reinforcement structure by installing a separate instrument in the field, at this time, because the instrument is exposed to the outside is exposed to the risk of physical damage to the outside or durability due to meteorological action There is a problem of deterioration. In addition, there is a problem that the workability is inferior because the additional work process that the instrument is installed after the reinforcement work is required.

Republic of Korea Patent No. 10-789924 (filed September 20, 2006), the title of the invention: "A method for analyzing the structure reinforcement state using the attached reinforcement with the optical fiber sensor" Republic of Korea Patent No. 10-1681520 (application date: April 21, 2016), the title of the invention: "Reinforcement structure and reinforcement method of concrete structure using carbon fiber sheet and reinforcement for attachment" Republic of Korea Patent No. 10-1455364 (application date: September 3, 2014), the title of the invention: "Method of reinforcing concrete structures, such as buildings and bridges using carbon fiber reinforcement plate" Republic of Korea Patent No. 10-1395202 (application date: February 10, 2014), the title of the invention: "carbon fiber reinforcement and grid-type fiber reinforcement and the method of reinforcing concrete structures using the same" Republic of Korea Patent No. 10-500421 (filed March 8, 2005), the title of the invention: "Reinforcement method of concrete structure using carbon fiber sheet" Republic of Korea Patent Publication No. 2008-0078766 (published: August 28, 2008), the title of the invention: "Carbon fiber reinforcement method using a high tension bolt"

The technical problem to be solved by the present invention for solving the above problems is, when manufacturing a carbon fiber plate laminated a plurality of carbon fiber sheets for the repair and reinforcement of the structure, the optical fiber sensor inside the carbon fiber plate in the carbon fiber plate manufacturing process It is to provide a fiber-optic sensor embedded carbon fiber plate and a manufacturing method thereof that can be integrated by embedding.

Another technical problem to be achieved by the present invention is to provide an optical fiber sensor embedded carbon fiber plate and a method of manufacturing the same, which can easily evaluate the reinforcement strength of the structure and the presence or absence of carbon fiber plate attachment by embedding and integrating the optical fiber sensor in the carbon fiber plate. It is to.

As a means for achieving the above-described technical problem, the manufacturing method of the fiber-optic sensor embedded carbon fiber plate according to the present invention, in the method for manufacturing a carbon fiber plate laminated a plurality of carbon fiber sheets for repair and reinforcement of the structure a) manufacturing a carbon fiber plate lower module and a carbon fiber plate upper module; b) arranging the steps formed in the carbon fiber plate lower module and the carbon fiber plate upper module to face each other; c) adhering the carbon fiber plate lower module and the carbon fiber plate upper module to form an optical fiber sensor buried portion which is an empty space for embedding an optical fiber sensor; d) embedding an optical fiber sensor in the optical fiber sensor embedding part; And e) injecting a grouting material into the optical fiber sensor embedding portion in which the optical fiber sensor is embedded, thereby completing an optical fiber embedded carbon fiber plate, wherein the optical fiber sensor is connected to the carbon fiber plate by the grouting material in step e). The lower module and the carbon fiber plate is characterized in that it is integrated with the carbon fiber plate bonded to the upper module.

Here, each of the carbon fiber plate lower module and the carbon fiber plate upper module includes a base carbon fiber sheet, a thermoplastic resin, and a carbon fiber sheet for forming a step, and have a cross section of a channel shape in which a step is formed to form an optical fiber sensor buried part. It is characterized by having.

Here, the thermoplastic resin is applied between the base carbon fiber sheet and the step forming carbon fiber sheet in a high temperature or high pressure environment and cured to bond the base carbon fiber sheet and the step forming carbon fiber sheet.

Here, the cross section of the channel form is characterized in that it has a constant formation in the longitudinal direction.

Here, the step c) using the adhesive of the epoxy resin to bond the carbon fiber plate lower module and the carbon fiber plate upper module, characterized in that the optical fiber sensor buried portion is formed inside the bonded carbon fiber plate is an empty space. .

Here, it is preferable that the grouting material of step e) is an ultra low viscosity epoxy resin.

The method of manufacturing a fiber sensor embedded carbon fiber plate according to the present invention may further include f) winding the optical fiber embedded carbon fiber plate in the form of a coil and transporting and storing the same.

Here, the optical fiber embedded carbon fiber plate may be attached to the surface of the structure in the field, and the optical fiber sensor may be extracted from the optical fiber embedded carbon fiber plate and connected to the measuring instrument.

According to the present invention, when manufacturing a carbon fiber plate laminated with a plurality of carbon fiber sheets for the repair and reinforcement of the structure, in the carbon fiber plate manufacturing process by embedding the optical fiber sensor embedded in the carbon fiber plate to integrate the optical fiber sensor carbon fiber plate It can be completely attached to the, thereby preventing physical damage by the outside of the optical fiber sensor.

According to the present invention, it is possible to easily evaluate the reinforcement strength of the structure and the presence or absence of the carbon fiber plate by embedding the optical fiber sensor embedded in the carbon fiber plate.

According to the present invention, by manufacturing in a carbon fiber plate manufacturing plant to ensure consistent product quality can be improved on-site construction.

1 is a view illustrating that the carbon fiber sheet is attached to the surface of the structure and reinforced, and measured through an optical fiber sensor.
Figure 2 is a flow chart of the carbon fiber reinforcement method using a carbon fiber sheet.
3 is a view for explaining the operating state of the optical fiber sensor in the structural reinforcement state analysis method using the attachment type reinforcement is equipped with a conventional optical fiber sensor.
4 is a diagram illustrating the mounting of the optical fiber sensor shown in FIG.
5 is a view showing the concept of an optical fiber sensor embedded carbon fiber plate according to an embodiment of the present invention.
6 is a cross-sectional view of an optical fiber sensor embedded carbon fiber plate according to an exemplary embodiment of the present invention.
7 is an operation flowchart of a method for manufacturing a fiber optic embedded buried carbon fiber plate according to an embodiment of the present invention.
8A to 8F are views for explaining in detail a manufacturing method of a fiber-optic sensor embedded carbon fiber plate according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

First, Korean Patent No. 10-789924, filed and registered by the applicant of the present invention, discloses an invention entitled "A method for analyzing structure reinforcement state using an attachment type reinforcement mounted with an optical fiber sensor". Reference is made to FIGS. 3 and 4, which are incorporated herein by reference and form part of the invention.

3 is a view for explaining the operation state of the optical fiber sensor in the structure reinforcement state analysis method using the attachment type reinforcement mounted in accordance with the prior art, Figure 4 illustrates the mounting of the optical fiber sensor shown in FIG. It is a figure.

Referring to FIG. 3, in general, the optical fiber sensor 40 may use an Optical Time Domain Reflectometry (OTDR) or a Fiber Bragg Gratting Sensor (FBG).

The optical fiber sensor 40 couples the pulse generating means 51, the laser diode 52, and the output pulsed light to the optical fiber, and scatters backwards, for example, as in the conventional measurement system. Coupling means 53 for outputting the light, the optical detector 54 for measuring the optical power of the pulsed light from the coupling means 53, and converts it into an electrical signal, an amplifier 55 for amplifying the electrical signal The AD converter 56 converts the amplified electric signal into a digital signal at a constant sampling rate. The AD converter 56 stores and analyzes the digital signal and outputs the generated data to the display. The measurement means 50 includes a signal processing unit 157 for outputting a control signal for adjusting and a setting signal for adjusting a sampling rate, and a display unit 58 for displaying the same, and includes an optical fiber 41. Shall.

As shown in Figure 3, the optical fiber 41 itself is installed in a manner that is attached to the reinforcement 60 in advance, the reinforcement 60 is a concrete structure in the form of carbon fiber sheet, FRP plate, FRP strip or steel sheet, etc. It is attached to the surface of the structure to be reinforced 70 such as by an adhesive such as epoxy. At this time, the carbon fiber sheet, FRP plate, FRP strip or steel sheet or the like may be attached to the reinforced structure 70 by other attachment means (mechanical attachment means such as anchor bolts).

At this time, the carbon fiber sheet, FRP plate, FRP strip or steel plate as the reinforcing material 60 will be described on the basis of the case where the optical fiber 41 is pre-installed by an adhesive on one surface of the reinforcing material.

As described above, the optical fiber 41 fixed to the reinforcement 60 has a length or a thickness change together with the dropping of the reinforcement 60, and the thickness and the length change may temporarily change the cross-sectional area of the optical fiber 41. To provide a factor.

The reinforcing material 60 is first fixed to the optical fiber 41 is installed. Accordingly, the predetermined pulsed light may be incident on the optical fiber 41 by the pulsed light output unit 51 and the laser diode 52 constituting the measuring means 50.

At this time, when the reinforcing material 60 is dropped from the structure to be reinforced, since the compressive force of the optical fiber is relaxed, because the optical fiber 41 is fixed to the reinforcing material 60 instantaneously, its thickness or length is increased. This increases the cross-sectional area of the optical fiber 41, thereby increasing the incident pulsed light (incident pulsed light).

Subsequently, when the adhesion performance of the reinforcement 60 attached by the adhesive is deteriorated due to deterioration of the adhesive with time, the cross-sectional area of the optical fiber 41 increases due to the dropping of the reinforcement 60. As a result, the electrical signal value is measured by the increase in the pulsed light incident on the optical fiber, and the measured signal value indicates whether the reinforcement is dropped.

In this case, the dropping of the reinforcement is estimated by the pulse generating means 51, the laser diode 52, the coupling means 53, the light detector 54, an amplifier for amplifying such an electrical signal (41) 55), the AD converter 56 and the signal processor 57 may be analyzed by the analysis unit and the display unit 58 including analysis programs and data that may be variously provided by a designer.

As a result, the optical fiber sensor 40 is installed on one surface of the reinforcing material 60 in advance to be in contact with the reinforcing portion of the reinforcing structure, so that it can be easily removed at any time without a special installation work. It can be measured.

Meanwhile, referring to FIG. 4, in the reinforcement 60, a carbon fiber sheet, an FRP plate, an FRP strip, or a steel sheet is used, but the optical fibers 41 are continuously arranged without disconnecting the entirety of one side of the reinforcement 60. This is an example. That is, by arranging the optical fibers 41 continuously without disconnection so as to cover the entire side surface of the reinforcing material 60, the narrower distance between the optical fibers 41 are formed so as to be narrow, so that a more accurate detection value can be obtained. In consideration of the size of the area of the stiffener 60, the extension length, etc., a plurality of continuous optical fibers 41 may be disposed without disconnection. The optical fiber 41 is formed as a kind of cable to be exposed to the outside in the attached state.

The measurement means 50 described above is connected to an end of the attached optical fiber 41 to measure a desired sensor measurement value. At this time, the optical fiber 41 is installed to be bent in accordance with the arrangement, in consideration of this point can be measured in the state in which the relationship between the amount of change and the arrangement of the amount of light incident on the optical fiber is set in advance. That is, the basic measurement value by the optical fiber sensor is set to the amount of change in the amount of light as the reinforcing material is dropped or damaged from the structure to be reinforced by the optical fiber sensor, so that the change in state of the reinforcement by the amount of change in the amount of light can be checked by the measuring means.

However, as described above, when the carbon fiber sheet is laminated and used as a carbon fiber plate, peeling or breaking of the interface with the carbon fiber plate causes a significant decrease in strength of the reinforcing structure, but it can be checked and judged. There is no suitable means to do this.

Accordingly, there have been attempts to bury the sensor to measure the adhesion of the carbon fiber plate or carbon fiber sheet, but due to problems in the manufacturing process of the carbon fiber plate that is cured and manufactured in an environment of high temperature or high pressure, the inside of the carbon fiber plate It is difficult to bury the sensor in the situation.

In addition, the carbon fiber sheet surface attachment method is a representative repair and reinforcement method of concrete structures because of excellent tensile strength and durability. Since the carbon fiber sheet reinforcement method may cause the peeling of the damaged part and the detachment of the attached part due to the poor coating during adhesion, it is necessary to investigate the attachment state to verify the reinforcing performance. Currently, the attachment state inspection method that is applied is difficult to secure objectivity and complete inspection by manpower survey. After the structure is reinforced by the sheet attachment method, accurate measurement and evaluation system of damage location and area is needed to identify damage type of reinforcement and establish countermeasures.

Accordingly, as an embodiment of the present invention, when manufacturing a carbon fiber plate laminated with a plurality of carbon fiber sheets for repair and reinforcement of the structure, in the carbon fiber plate manufacturing process can be integrated by embedding the optical fiber sensor inside the carbon fiber plate. The fabrication method of the embedded fiber optic plate embedded in the optical fiber sensor will be described.

[Fiber Optic Sensor Embedded Carbon Fiber Plate (100)]

5 is a view showing the concept of an optical fiber sensor embedded carbon fiber plate according to an embodiment of the present invention, Figure 6 is a cross-sectional view of the optical fiber sensor embedded carbon fiber plate according to an embodiment of the present invention.

As shown in Figure 5 and Figure 6, the fiber-optic sensor embedded carbon fiber plate 100 according to an embodiment of the present invention, the carbon fiber plate lower module 110, the carbon fiber plate upper module 120, the adhesive 130 ), The optical fiber sensor buried portion 140, the optical fiber sensor 150 and the grouting material 160, wherein the carbon fiber plate lower module 110, the carbon fiber plate upper module 120 are each the same shape The carbon fiber plate lower module 110 and the carbon fiber plate upper module 120 are formed to face each other and then bonded by the adhesive 130 to form the optical fiber sensor buried part 140.

In this case, the optical fiber sensor 150 is embedded in the optical fiber sensor buried portion 140, and then, by injecting and curing the grouting material 160, which is an ultra-low viscosity epoxy resin, into the optical fiber sensor buried portion 140, The optical fiber sensor 150 is integrated with the carbon fiber plate 100 to which the carbon fiber plate lower module 110 and the carbon fiber plate upper module 120 are adhered by the grouting material 160.

That is, in the case of the embedded fiber optic sensor-fiber carbon fiber plate according to the embodiment of the present invention, the fiber optic sensor may be embedded in the carbon fiber plate to measure the behavior of the structure according to the attachment of the carbon fiber plate.

[Production method of embedded fiber optic plate with optical fiber sensor]

FIG. 7 is a flowchart illustrating a method of manufacturing a fiber optic embedded buried carbon fiber plate according to an embodiment of the present invention, and FIGS. 8A to 8F illustrate a method of manufacturing a fiber optic embedded buried carbon fiber plate according to an embodiment of the present invention. Figures for.

Referring to Figure 7, the manufacturing method of the fiber-optic sensor embedded carbon fiber plate according to an embodiment of the present invention, first, two carbon fiber plate modules of the same shape, that is, carbon fiber plate lower module ( 110) and the carbon fiber plate upper module 120 is produced (S110). Specifically, as shown in FIG. 8A, each of the carbon fiber plate lower module 110 and the carbon fiber plate upper module 120 may include base carbon fiber sheets 111 and 121, thermoplastic resins 112 and 122, and step formation. It consists of carbon fiber sheets 113 and 123, and has a cross section in the form of a channel in which a step is formed to form an optical fiber sensor buried portion.

Specifically, the base carbon fiber sheets 111 and 121 and the stepped carbon fiber sheets 113 and 123 are bonded by thermoplastic resins 112 and 122 which are polymers, respectively. In this case, the stepped carbon fiber sheets Reference numerals 113 and 123 are attached to the base carbon fiber sheets 111 and 121 so as to have a channel-shaped step for forming an optical fiber sensor buried portion, wherein the shape of the cross section of the channel shape is constant in the longitudinal direction. Further, in order to form the channel-shaped cross section, a plurality of layers of carbon fiber sheets, for example, base carbon fiber sheets 111 and 121 and stepped carbon fiber sheets 112 and 122, which are thinly woven in thickness, are existing. In the same manner as in the manufacturing method of the thermoplastic resin 113, 123 is a polymer in a high temperature or high pressure environment to prepare to bond. That is, the thermoplastic resins 113 and 123 are applied between the base carbon fiber sheets 111 and 121 and the step forming carbon fiber sheets 112 and 122 in a high temperature or high pressure environment, thereby curing the base carbon fiber sheets. (111, 121) and the stepped carbon fiber sheets 112, 122 are bonded.

Next, as shown in Figure 8b, the two carbon fiber plate lower module 110 and the carbon fiber plate upper module 120 are disposed so that each step facing each other (S120).

Next, as shown in Figure 8c, using the adhesive 130 is an epoxy resin to bond the two carbon fiber plate lower module 110 and the carbon fiber plate upper module 120 (S130). At this time, the optical fiber sensor buried portion 140 is formed inside the bonded carbon fiber plates 110 and 120.

Next, as shown in FIG. 8D, the optical fiber sensor 150 is inserted and embedded in the optical fiber sensor buried portion 140, which is an empty space inside the bonded carbon fiber plates 110 and 120 (S140).

Next, as shown in Figure 8e, by injecting the grouting material 160 into the optical fiber sensor buried portion 140, the optical fiber sensor buried carbon in which the optical fiber sensor 150 is embedded in the carbon fiber plates (110, 120) Complete the fiber plate 100 (S150). In this case, the optical fiber sensor 150 is integrated with the carbon fiber plate 100 to which the carbon fiber plate lower module 110 and the carbon fiber plate upper module 120 are adhered by the grouting material 160. Here, it is preferable that the grouting material 160 is an ultra low viscosity epoxy 160.

Next, as shown in Figure 8f, the completed fiber-optic sensor embedded carbon fiber plate 100 is, for example, wound and transported and stored in the form of a coil of 80cm in diameter (S160).

Subsequently, the buried carbon fiber plate 100 according to the embodiment of the present invention may be constructed in the same manner as the existing carbon fiber plate in the field. That is, the optical fiber embedded carbon fiber plate 100 may be attached to the surface of the structure in the field, and the optical fiber sensor 150 may be drawn out from the optical fiber embedded carbon fiber plate 100 and connected to the measuring instrument. As shown, the adhesion of the carbon fiber plate can be measured or the behavior of the structure can be measured. Accordingly, the reinforcing performance of the optical fiber sensor embedded carbon fiber sheet 100 according to the embodiment of the present invention can be quantitatively grasped the reinforcing effect and state of the concrete structure by tracking the reinforcing performance immediately after completion of construction and regularly.

As a result, according to an embodiment of the present invention, when manufacturing a carbon fiber plate laminated with a plurality of carbon fiber sheets for the repair and reinforcement of the structure, the optical fiber by embedding the optical fiber sensor embedded in the carbon fiber plate in the carbon fiber plate manufacturing process The sensor can be completely attached to the carbon fiber plate, thereby preventing physical damage by the outside of the optical fiber sensor.

In addition, according to an embodiment of the present invention, by embedding and integrating the optical fiber sensor in the carbon fiber plate, it is easy to evaluate the reinforcement strength of the structure and the presence or absence of carbon fiber plate attached, and also manufactured in a carbon fiber plate manufacturing plant to produce a consistent product Ensuring quality can improve field workability.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

100: embedded fiber optic plate
110: carbon fiber plate lower module
120: carbon fiber plate upper module
130: adhesive (epoxy resin)
140: fiber optic buried part
150: optical fiber sensor
160: grouting material (ultra low viscosity epoxy resin)
111, 121: base carbon fiber sheet
112, 122: polymer (thermoplastic)
113, 123: stepped carbon fiber sheet

Claims (9)

In the method of manufacturing a carbon fiber plate (Carbon Fiber Plate) laminated a plurality of carbon fiber sheets for repair and reinforcement of the structure,
a) manufacturing a carbon fiber plate lower module 110 and a carbon fiber plate upper module 120;
b) arranging the steps formed in the carbon fiber plate lower module 110 and the carbon fiber plate upper module 120 to face each other;
c) adhering the carbon fiber plate lower module 110 and the carbon fiber plate upper module 120 to form an optical fiber sensor embedding unit 140 which is an empty space for embedding an optical fiber sensor;
d) embedding the optical fiber sensor 150 in the optical fiber sensor buried portion 140; And
e) injecting the grouting material 160 into the optical fiber sensor buried portion 140, the optical fiber sensor 150 is embedded, to complete the optical fiber embedded carbon fiber plate 100,
In step e), the optical fiber sensor 150 is integrated with the carbon fiber plate to which the carbon fiber plate lower module 110 and the carbon fiber plate upper module 120 are bonded by the grouting material 160. Method of manufacturing a fiber-optic sensor embedded carbon fiber plate. The method of claim 1,
Each of the carbon fiber plate lower module 110 and the carbon fiber plate upper module 120 includes base carbon fiber sheets 111 and 121, thermoplastic resins 112 and 122, and carbon fiber sheets 113 and 123 for forming a step. Includes, the method of manufacturing a fiber-optic sensor embedded carbon fiber plate, characterized in that it has a cross section in the form of a channel to form a step to form a fiber optic buried portion. The method of claim 2,
The thermoplastic resins 113 and 123 are applied between the base carbon fiber sheets 111 and 121 and the step forming carbon fiber sheets 112 and 122 in a high temperature or high pressure environment, thereby curing the base carbon fiber sheets 111. , 121) and the manufacturing method of the optical fiber sensor embedded carbon fiber plate, characterized in that the stepped carbon fiber sheet (112, 122) is bonded. The method of claim 2,
The cross section of the channel shape is a method of manufacturing a fiber-optic sensor embedded carbon fiber plate, characterized in that it has a constant formation in the longitudinal direction. The method of claim 1,
Bonding the carbon fiber plate lower module 110 and the carbon fiber plate upper module 120 using the adhesive 130 which is an epoxy resin in the step c), the hollow inside the bonded carbon fiber plates (110, 120) Method of manufacturing a fiber-optic sensor embedded carbon fiber plate, characterized in that the space is formed in the optical fiber sensor buried portion 140. The method of claim 1,
The grouting material 160 of step e) is a method of manufacturing a fiber-optic sensor embedded carbon fiber plate, characterized in that the ultra-low viscosity epoxy resin. The method of claim 1,
f) winding the optical fiber embedded carbon fiber plate 100 in the form of a coil, the method of manufacturing an optical fiber sensor embedded carbon fiber plate further comprising the step of transporting and storing to the site. The method of claim 7, wherein
The fiber-embedded carbon fiber plate 100 is attached to the surface of the structure in the field, the fiber-optic sensor embedded carbon fiber, characterized in that to take out the optical fiber sensor 150 from the optical fiber embedded carbon fiber plate 100 and to connect to the instrument How to make a plate. A carbon fiber plate manufactured by a method of manufacturing an optical fiber sensor embedded carbon fiber plate according to any one of claims 1 to 8.

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