CN208505877U - A kind of specialty optical fiber suitable for distress in concrete monitoring - Google Patents
A kind of specialty optical fiber suitable for distress in concrete monitoring Download PDFInfo
- Publication number
- CN208505877U CN208505877U CN201821212821.1U CN201821212821U CN208505877U CN 208505877 U CN208505877 U CN 208505877U CN 201821212821 U CN201821212821 U CN 201821212821U CN 208505877 U CN208505877 U CN 208505877U
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- optical fiber
- protective case
- fibre core
- covering
- specialty optical
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Abstract
The utility model discloses a kind of specialty optical fibers suitable for distress in concrete monitoring; from inside to outside; successively it is made of fibre core, covering and protective case; fibre core and covering are made of acrylic resin or polystyrene resin material; the outer surface of the protective case is Non-smooth surface outer surface, is provided with several bulge-structures on outer surface.The utility model has many advantages, such as to be not easily broken, can monitor big aperture crack, be not susceptible to sliding, protective case inhibition is small.
Description
Technical field
The utility model relates to communication technique field, in particular to a kind of specialty optical fiber.
Background technique
In recent years, optical fiber with its light weight, electromagnetism interference, it is anticorrosive, can remotely monitor, can distributed monitoring etc. it is many
Advantage is widely used in the Crack Monitoring of concrete structure.It is commonly Silica-Based Optical Fibers in distress in concrete monitoring.
The Typical Representative structure of Silica-Based Optical Fibers is three-decker, is followed successively by fibre core, covering and protection jacket layer from inside to outside.
The fibre core of Silica-Based Optical Fibers is made by quartz, and silica core is very fragile, easily snaps off.Concrete engineering construction ring
Border is severe, therefore when laying silica fibre, silica fibre is easily broken off, and survival rate is very low.The characteristics of silica fibre frangibility,
Also result in that the fracture aperture that it can be monitored is smaller, because the crack of larger opening can make optical fiber fracture.Secondly, traditional optical fiber
Protective case surface is shiny surface, and when concrete cracks, unexpected sliding easily occurs, influences the effect for monitoring crack.In addition,
Traditional silica fibre protective case is made by softer plastic material, is the covering and fibre core phase of quartz with main material
Want that much lower (protective case elasticity modulus is 10 than, the elasticity modulus of fiber boot-1GPa rank, quartzy elasticity modulus are
102GPa rank).When optical fiber being embedded in inside concrete being used for Crack Monitoring, covering and fibre core are for perceiving coagulation soil cracking
Seam, and protective case mainly protects covering and fibre core.When concrete cracks, concrete will drive protective case and occur centainly
Deformation, and since fibre core is harder, softer protective case is difficult to drive fibre core that synchronous deformation occurs.So covering, fibre core modulus compared with
Greatly, the lesser feature of protective case modulus can reduce the ability of covering and fibre core perception concrete cracking deformation, and protective case is in light
Inhibition is produced in the application of fine Crack Monitoring.
Utility model content
The purpose of this utility model is to provide a kind of specialty optical fibers suitable for distress in concrete monitoring, have not
Frangibility can monitor big aperture crack, be not susceptible to sliding, the advantages that protective case inhibition is small.
A kind of specialty optical fiber suitable for distress in concrete monitoring, from inside to outside, successively by fibre core, covering and protective case
Composition, fibre core and covering are made of acrylic resin or polystyrene resin material, and the outer surface of the protective case is non-
Smooth outer surface is provided with several bulge-structures on outer surface.
Preferably, fibre core and covering are made of PMMA or PS resin material.
Preferably, the diameter of fibre core be 0.25-1mm, covering with a thickness of 0.005-0.01mm.
Preferably, protective case is made of vinyl chloride resin material.
Preferably, 0.25 to 0.5 times with a thickness of core diameter of protective case.
Preferably, the outer surface of protective case is provided with skid resistance strip.
Preferably, the height of bulge-structure is less than 0.5 times core diameter greater than zero.
Preferably, bulge-structure is conical, truncated cone-shaped, triangular pyramidal or cylinder.
Compared with prior art, the utility model fibre core is by polymeric material, have be not easily broken, deformability it is strong
The characteristics of.For the specialty optical fiber when being embedded in concrete, survival rate is high, and can monitor big aperture crack；The Non-smooth surface of protective case
Surface makes the optical fiber for being embedded in inside concrete be less prone to sliding, to increase the stability in fiber-optic monitoring crack.Protection
The smaller and close feature of set, covering, fibre core three's elasticity modulus of materials, so that protective case hinders caused by monitoring crack fibre core
Hinder small.In addition, it is lower than conventional quartz system optical fiber by the cost of the optical fiber of polymeric material, greatly reduce production cost.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is this
Some embodiments of utility model, for those of ordinary skill in the art, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the sectional view of Fig. 1.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments, based on the implementation in the utility model
Example, those of ordinary skill in the art's every other embodiment obtained without making creative work, all belongs to
In the range of the utility model protection.
As shown in Figs. 1-2, the utility model embodiment provides a kind of special light suitable for distress in concrete monitoring
Fibre is made of fibre core 1, covering 2, protective case 3.Fibre core 1 and covering 2 are made by high transparency polymer, for example, PMMA or
PS resin material.There is stronger deformability by the fibre core 1 and covering 2 of resin material production, elasticity modulus of materials is smaller, because
This is not easily broken in use, and has preferable deformability.In distress in concrete monitoring application, preferable deformability
But also optical fiber can monitor the crack of big aperture.The diameter of fibre core 1 is 0.25-1mm, preferably 0.5mm.Covering 2 with a thickness of
0.005-0.01mm, preferred thickness 0.008mm.Protective case 3 as with polymer similar in fibre core 1,2 modulus of covering production and
At, such as PVC, and 3 outer surface of protective case has projective structure 4, the outer surface of protective case 3 also has non-slip texture, protective case 3
0.25 to 0.5 times with a thickness of 1 diameter of fibre core.The projective structure 4 of 3 outer surface of protective case can increase concrete and optical fiber it
Between frictional force, so in use optical fiber be not susceptible to slide.In addition, in the production process, make protective case 3 and covering 2 and
The bonding of fibre core 1 forms an entirety, further decreases a possibility that opposite sliding occurs between protective case and fibre core.Protective case 3, packet
Layer 2 is close with the elasticity modulus of materials that fibre core 1 is selected, so that when concrete cracks, under the drive of concrete, protection
The deformation synchronous with fibre core 1 of set 3, covering 2, the inhibition in Crack Monitoring application of protective case 3 are small.
In use, the specialty optical fiber of the utility model is embedded in inside concrete.In concreting, in concrete
Surface fluting, specialty optical fiber is placed in slot, is then filled with fine concrete, continues to pour next layer after vibration compacting
Concrete.After specialty optical fiber is buried well, specialty optical fiber one end is connect with optical time domain reflectometer, optical time domain reflectometer can be to optical fiber
Internal optics characteristic is detected.Work as optical time domain reflectometer, when detecting some position generation light loss of specialty optical fiber, says
There is crack appearance in the bright position.The size of light loss consumption has reacted the size of fracture aperture, and the growth and reduction of light loss are then right
Answer the opening and closing in crack.
Finally, it should be noted that the above is only the preferred embodiment of the present invention, it is merely to illustrate practical
Novel technical solution, is not intended to limit the protection scope of the utility model.It is all the spirit and principles of the utility model it
Interior done any modification, equivalent substitution, improvement and etc., are all contained in the protection scope of the utility model.
Claims (7)
1. a kind of specialty optical fiber suitable for distress in concrete monitoring, from inside to outside, successively by fibre core, covering and protective case group
At, which is characterized in that fibre core and covering are made of acrylic resin or polystyrene resin material, outside the protective case
Surface is Non-smooth surface outer surface, is provided with several bulge-structures on outer surface.
2. specialty optical fiber according to claim 1, which is characterized in that fibre core and covering use PMMA or PS resin material system
At.
3. specialty optical fiber according to claim 1, which is characterized in that the diameter of fibre core is 0.25-1mm, the thickness of covering
For 0.005-0.01mm.
4. specialty optical fiber according to claim 1, which is characterized in that protective case is made of vinyl chloride resin material.
5. specialty optical fiber according to claim 1, which is characterized in that protective case arrives with a thickness of the 0.25 of core diameter
0.5 times.
6. specialty optical fiber according to claim 1, which is characterized in that the outer surface of protective case is provided with skid resistance strip.
7. specialty optical fiber according to claim 1, which is characterized in that the height of bulge-structure is greater than zero less than 0.5 times
Core diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821212821.1U CN208505877U (en) | 2018-07-27 | 2018-07-27 | A kind of specialty optical fiber suitable for distress in concrete monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821212821.1U CN208505877U (en) | 2018-07-27 | 2018-07-27 | A kind of specialty optical fiber suitable for distress in concrete monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208505877U true CN208505877U (en) | 2019-02-15 |
Family
ID=65290822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821212821.1U Active CN208505877U (en) | 2018-07-27 | 2018-07-27 | A kind of specialty optical fiber suitable for distress in concrete monitoring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208505877U (en) |
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2018
- 2018-07-27 CN CN201821212821.1U patent/CN208505877U/en active Active
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