CN106679700A - Simple and rapid anchoring method and apparatus of distributive sensing optical cable - Google Patents
Simple and rapid anchoring method and apparatus of distributive sensing optical cable Download PDFInfo
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- CN106679700A CN106679700A CN201710073594.2A CN201710073594A CN106679700A CN 106679700 A CN106679700 A CN 106679700A CN 201710073594 A CN201710073594 A CN 201710073594A CN 106679700 A CN106679700 A CN 106679700A
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- optical cable
- sensing optical
- distributed sensing
- intermediate plate
- spring
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- 230000003287 optical effect Effects 0.000 title claims abstract description 119
- 238000004873 anchoring Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 49
- 229910052751 metal Inorganic materials 0.000 claims abstract description 49
- 239000011435 rock Substances 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims description 23
- 239000013307 optical fiber Substances 0.000 claims description 17
- 239000002689 soil Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 2
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- 239000000463 material Substances 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 238000005253 cladding Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 19
- 238000005516 engineering process Methods 0.000 description 8
- 230000035882 stress Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
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- 238000013461 design Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a simple and rapid anchoring method and apparatus of a distributive sensing optical cable. A large cylinder is nested in a flange, and hollow circular truncated cones are fixed at two ends of the large cylinder; a spring is arranged in the large cylinder, metal clamping pieces are fixed at two ends of the spring, the other end of each metal clamping piece is connected with a small cylinder, and the flange, the large cylinder, the spring, the metal clamping pieces and the small cylinder are coaxial; and a loose-sleeve distributive sensing optical cable passes through a circular hole on the peripheral edge of the flange to play an effect of temperature compensation and alignment. According to the optical cable anchoring apparatus, the elastic force is controlled by virtue of a stiffness coefficient of the spring, the stress on a cross section of the loose-sleeve distributive sensing optical cable is uniformly distributed, and the optical cable is firmly installed; and moreover, the simple and rapid anchoring apparatus is small in size, simple in production, easy to operate, rapid to install, low in cost, small in micro-bend loss of an optical path, reliable in anchoring effect, suitable for the distributive sensing cables of different sizes, structures and cladding materials, and can firmly fix the distributive sensing optical cable on concrete, inside a rock and earth mass or on the surfaces of steel structures and concrete structures.
Description
Technical field
The present invention relates to fiber-optic monitoring and installation technicses field, and in particular to a kind of distributed sensing optical cable simple and fast anchor
Solid method and device.
Background technology
Optical fiber sensing technology develops very rapidly, with sensitivity in recent decades as a kind of new sensing technology
Height, compact, strong interference immunity, good insulating, corrosion-resistant, cost performance are high, monitoring distance is long, the advantages of be easily integrated.Its
Middle Brillouin light time domain reflection technology (BOTDR), Brillouin optical time domain analysis technology (BOTDA), Brillouin light frequency-domain analysis skill
Art (BOFDA) distributed optical fiber sensing technology unites two into one " biography " and " sense ", all positions along measurable optical fiber, optical cable
Strain and the parameter such as temperature, the application in fields such as military affairs, national defence, the energy, medical treatment, household electrical appliances and civil engineerings is more next in recent years
It is wider, there is very big development potentiality especially in Geotechnical Engineering, Geological Hazards Monitoring early warning.At present, occurred both at home and abroad
Many application distribution formula sensing optic cables monitoring tunnel deformations, landslide displacement, pipeline stress, dam seepage, subgrade settlement, ground
Collapse, the case history of base pit stability.
Research on distributed sensing optical cable in recent years gradually increases, but it is main still concentrate on Fibre Optical Sensor precision,
Stability is improved, the design of novel optical fiber sensor, networking, and measured data is analyzed and excavated, and various materials-optical cable interface
The aspects such as coupling, but seldom it is related to the design and field conduct of distributed sensing optical cable anchor.Because tradition is distributed
Formula sensing optic cable surface is very smooth, if cable surface is fixed without anchor, can cause the control of monitoring site three-dimensional coordinate
Become abnormal difficult, while monitoring result poor reliability, measuring accuracy is subject to the very big of optical cable and testee interface coupling
Influence.At present for the anchorage problem of distributed sensing optical cable, never good solution both at home and abroad.With distribution
The engineer applied of optical fiber sensing technology is more and more, and optical cable anchorage problem has been increasingly becoming a limit fibre monitoring technology development
Bottleneck problem.
At present in engineering site, for the fixation of distributed sensing optical cable, pasted using glue such as epoxy resin more, or
Carry out simple physics anchoring.Glue fix method operate it is complex, and implement when need to wait for glue curing, shadow
Construction speed is rung, has larger limitation the aspects such as poor, the time-consuming, aesthetic property of construction of standardization are installed；On the other hand, in length
In phase monitoring process, the performance of glue is influenceed by environmental factors such as temperature, humidity, air-borne dusts again, exist fixation it is not firm,
Coupling Deformation is poor, poor durability, the easily aging shortcomings such as come off.
Simple physics is anchored and typically utilizes iron wire colligation, or the fixation of screw, nut and rigid clip etc., the former is present
Anchoring process is simple and crude, optical cable holds eely defect, and the latter has construction procedure many, and special clamping piece structure is complicated, involves great expense, nothing
The shortcomings of method control chucking power size.Also one important problem is that simple physics anchoring can neither fully meet anchoring
The requirement of intensity, can produce potential physical damnification to cable configuration again, and larger microbending loss is susceptible in light path, reduce
The accuracy of fiber-optic monitoring data, monitoring reading can cannot be obtained when serious.So, it is badly in need of a kind of simple structure of research and development, it is fixed
Firm, anchoring is quick, cheap, applied widely, the new distribution type sensing optic cable anchoring side without physical damnification to optical cable
Method and its device, under conditions of site operation progress and monitoring effect is not influenceed, realize rapid anchor of the optical cable in monitoring field
Gu and embedded fixation.
The content of the invention
The purpose of the present invention is directed to the shortcoming of prior art presence, there is provided a kind of distributed sensing optical cable simple and fast anchor
Solid method and device, with make it is simple, anchor firm, attractive in appearance, easy to operate, time saving and energy saving, easily controllable chucking power, to light
The features such as cable not damaged, small light path microbending loss.The anchoring process and device are applied to different size, structure and clad material
Distributed sensing optical cable, can be securely fixed in concrete, the inside of Rock And Soil or steel construction, the table of concrete structure
Face.
A kind of simple and fast anchor of distributed sensing optical cable that the present invention is provided, including it is ring flange, large cylinder, small
Cylinder, hollow round table, metal intermediate plate, spring, the large cylinder are placed in ring flange, two ends fixation hollow round platform, in large cylinder
Spring is provided with, the two ends of spring are provided with metal intermediate plate, and the other end of metal intermediate plate is connected with small cylinder, ring flange, large cylinder, bullet
Spring, metal intermediate plate and small cylinder are coaxial；Optical cable installation folder is detachably connected on the small cylinder at two ends；Described metal intermediate plate exists
It is open configuration under spring-compressed state, is closure state under spring extended configuration.
The circular hole on the ring flange periphery penetrates one for temperature-compensating and aims at the loose dwelling distributed sensing of centering
Optical cable.
The opening and closing of described metal intermediate plate are controlled by optical cable installation folder, when optical cable installation folder is by anchor
The small cylinder at two ends is pressed into large cylinder, then spring compression, and metal intermediate plate is separated from each other, and open-shaped state will now be waited to anchor
Tight set type distributed sensing optical cable be axially inserted into anchor；When optical cable installation folder is unclamped, metal intermediate plate is in spring force
In the presence of rebound, metal intermediate plate is in closure state so that tight set type distributed sensing optical cable is clamped.
The metal intermediate plate at least provided with three valves, intermediate plate can folding realize auto-lock function.
The metal clip surface is provided with rubber sheet gasket.
The simple and fast anchor is directly anchored in mounting seat according to detection requirement, mounting seat with it is tested
The surface of structure is fixedly connected；Or direct-burried is in detected concrete or the inside of Rock And Soil.
The anchoring process of the simple and fast anchor based on described distributed sensing optical cable, first will with optical cable installation folder
In the small cylinder press-in large cylinder at simple and fast anchor two ends so that spring compression, metal intermediate plate is separated from each other, and now will
Tight set type distributed sensing optical cable to be anchored is axially inserted into simple and fast anchor；Then optical cable installation folder is unclamped,
Metal intermediate plate rebounds under spring force so that tight set type distributed sensing optical cable is clamped；It is again that loose dwelling is distributed
Sensing optic cable is penetrated in the circular hole on ring flange；Above method is repeated, simple and fast anchor is pacified according to certain spacing
On distributed sensing optical cable to be anchored, then distributed sensing optical cable is fixed on tested structure by mounting seat
Surface, or direct-burried is in detected concrete or the inside of Rock And Soil, loose dwelling and tight set type distributed sensing optical cable and optical fiber solution
Instrument connection is adjusted, reading is monitored.
Beneficial effect：
The present invention is capable of achieving convenient, efficient distributed sensing optical cable anchoring by the improvement of the above, drastically increases
Efficiency of construction, while can realize temperature-compensating again, plays a part of to calibrate centering, has filled up in technical field of optical fiber sensing and has been distributed
The blank of formula sensing optic cable anchorage style.Special optical cable installation folder is formed according to the self structure of anchor is special so that
Tight set type distributed sensing optical cable can pass easily through anchor.The metal clip surface is provided with rubber sheet gasket, can keep away
Exempt from optical cable to be contacted with the hard of metal intermediate plate, reduce the stress concentration that optical cable is produced in anchoring, while the elastic force that optical cable is subject to
Big I is controlled by the stiffness factor of spring, and is evenly distributed in cable cross-section upper stress, and optical cable is firmly installed, and micro-bend
Loss is small.Instant invention overcomes numerous shortcomings of conventional distributed sensing optical cable anchorage style, while having numerous other work(concurrently again
Can, it is convenient and practical, with wide marketing and application value.
According to recklessly can law F=kx and optical fiber cable nature, control optical cable by adjusting the stiffness factor of spring
The size of chucking power so that chucking power suffered by the tight set type distributed sensing optical cable surface of different size, structure and clad material
Can arbitrarily adjust, reach optimal anchoring effect.
Flange thickness and diameter on anchor can be actually needed to be designed according to field monitoring, with full
The certain anchoring bearing capacity of foot, it is ensured that will not be slipped between optical cable and testee.The spacing of anchor is needed also according to monitoring
To determine.
Mounting seat can choose different shapes according to the difference of measurement structure, can realize gluing, welding, bolt
The different mounting means such as connection.
Brief description of the drawings
Fig. 1 is the structural representation that anchor of the invention is implemented.
Fig. 2 is that anchor of the invention is in opening and closing two states schematic diagram.
Fig. 3 is the schematic diagram that present invention anchoring is arranged on tested structure surface.
Fig. 4 is the schematic diagram that present invention anchoring is embedded in inside detected concrete or Rock And Soil.
Ring flange 1, large cylinder 2, small cylinder 3, hollow round table 4, metal intermediate plate 5, spring 6, tight set type distributed sensing light
Cable 7, loose dwelling distributed sensing optical cable 8, optical cable installation folder 9, anchor 10, mounting seat 11 is tested structure 12, optical fiber
(FBG) demodulator 13, detected concrete or Rock And Soil 14.
Specific embodiment
Distributed sensing optical cable simple and fast anchoring process and device, including ring flange, large cylinder, small cylinder, open circles
Platform, metal intermediate plate, spring.The ring flange and large cylinder are welded to each other, two ends fixation hollow round platform.Bullet is provided with large cylinder
Metal intermediate plate is fixed at spring, the two ends of spring, and the other end of metal intermediate plate is connected with small cylinder.Metal intermediate plate is flat strip,
At least provided with three valves, intermediate plate can folding realize auto-lock function.Have one layer of rubber sheet gasket on sheet metal surface so that anchoring light
Stress concentration will not be produced during fine or optical cable, to prevent distributed sensing optical cable structural damage, or optical path loss is excessive.Flange
Disk, large cylinder, spring, metal intermediate plate and small cylinder are coaxial；Optical cable installation folder is detachably connected on the small cylinder at two ends.
The circular hole on ring flange periphery can penetrate a loose dwelling distributed sensing optical cable, on the one hand play the work of temperature-compensating
With on the other hand being stretched can play centering effect, improve the degree of accuracy that optical cable is installed.Filled when will be anchored with optical cable installation folder
The small cylinder for putting two ends is pressed into large cylinder so that spring compression, metal intermediate plate is separated from each other, and now can vertically insert optical cable
In entering anchor；When optical cable installation folder is unclamped, metal clip sector-meeting is rebounded under spring force so that optical cable is pressed from both sides
Tightly, the effect of anchoring optical cable is reached with this.The surface of metal intermediate plate 5 is provided with rubber sheet gasket, can avoid optical cable and metal
The hard contact of intermediate plate, reduces the stress concentration that optical cable is produced in anchoring, while the big I of elastic force that optical cable is subject to passes through bullet
The stiffness factor control of spring, and be evenly distributed on section, optical cable is firmly installed, and microbending loss is small.
When need to by deformation monitoring is carried out in distributed sensing optical cable Transducers Embedded in Concrete or Rock And Soil when, by anchor according to
Certain spacing is arranged on distributed strain sensor fibre or optical cable, to ensure the deformation coupling of optical fiber or optical cable and surrounding medium
Close.
Deformed when distributed strain sensor fibre or optical cable need to be arranged on concrete structure or steel structure surface
During monitoring, by optical fiber cable anchor according to certain spacing (l1、l2、l3……、ln) it is arranged on distributed strain sense light
On fine or optical cable, then fixed with monitored works by mounting seat.
According to recklessly can law F=kx and optical fiber nature, control optical cable to clamp by adjusting the stiffness factor of spring
The size of power so that chucking power suffered by the tight set type distributed sensing optical cable surface of different size, structure and clad material can appoint
Meaning adjustment, reaches optimal anchoring effect.
Embodiment：
As depicted in figs. 1 and 2, structure of the present invention includes：Ring flange 1, large cylinder 2, small cylinder 3, hollow round table 4, metal
Intermediate plate 5, spring 6.Agent structure includes that ring flange and large cylinder are welded to each other, two ends fixation hollow round platform.It is provided with large cylinder
Metal intermediate plate is fixed at spring, the two ends of spring, and the other end of metal intermediate plate is connected with small cylinder.Metal intermediate plate is flat strip
Shape, and have one layer of rubber sheet gasket on sheet metal surface so that will not produce stress concentration during anchoring optical fiber or optical cable.Flange
Disk, large cylinder, spring, metal intermediate plate and small cylinder are coaxial；Optical cable installation folder is detachably connected on the small cylinder at two ends.
The small cylinder at anchor two ends is pressed into large cylinder when with optical cable installation folder so that spring compression, metal clip
Piece is separated from each other, and now tight set type distributed sensing optical cable can be axially inserted into anchor；When release optical cable installation folder
When, metal clip sector-meeting is rebounded under spring force so that tight set type distributed sensing optical cable is clamped.
By anchor of the invention 10 be fixed in mounting seat 11 optical cable 7 and 8 by Fig. 3, and mounting seat 11 is fixed
On the surface of tested structure 12, then optical cable 7 and 8 is connected on optical fibre interrogation instrument 13, you can be monitored reading.Fig. 4 will
Anchor 10 is embedded in the inside of Rock And Soil 14 according to certain spacing, and optical cable 7 and 8 finally is connected into optical fibre interrogation instrument 13
On carry out reading.Two kinds of optical cable arrangements can significantly increase the Coupling Deformation between optical cable and testee, improve point
The monitoring accuracy of cloth sensing optic cable.
According to recklessly can law F=kx and optical fiber nature, control optical cable to clamp by adjusting the stiffness factor of spring
The size of power so that chucking power suffered by the tight set type distributed sensing optical cable surface of different size, structure and clad material can appoint
Meaning adjustment, reaches optimal anchoring effect.
Anchoring spacing (the l of optical cable1、l2、l3……、ln) be designed according to actual requirement, when the optimal anchoring spacing of selection
Afterwards, mark is carried out on optical cable.Then anchor is unclamped using optical cable installation folder so that tight shell type distributed sensing optical cable
Passed through.When anchor reaches design anchorage point so that anchor is closed, and just can reach optimal anchoring
Effect.Then, by loose sleeve distributed sensing optical cable through the circular hole on ring flange.Next step reuses optical cable installation folder by under
One anchor and optical cable are connected.By that analogy, cause that all anchors arrival design anchorage points can be complete in order
Into the whole anchoring of optical cable.
Flange thickness and diameter on anchor can be actually needed to be designed according to field monitoring, with full
The certain anchoring bearing capacity of foot, it is ensured that will not be slipped between optical cable and testee.The spacing of anchor is needed also according to monitoring
To determine.
In addition to the implementation, the present invention can also have other embodiment.All use equivalents or equivalent transformation shape
Into technical scheme, all fall within the protection domain of application claims.
Claims (7)
1. the simple and fast anchor of a kind of distributed sensing optical cable, it is characterised in that：Including ring flange (1), large cylinder
(2), small cylinder (3), hollow round table (4), metal intermediate plate (5), spring (6), the large cylinder are placed in ring flange, and two ends are fixed
Hollow round table, is provided with spring in large cylinder, the two ends of spring are provided with metal intermediate plate, and the other end of metal intermediate plate connects with small cylinder
Connect, ring flange, large cylinder, spring, metal intermediate plate and small cylinder are coaxial；Optical cable installation folder (9) is detachably connected on the small of two ends
On cylinder；Described metal intermediate plate is open configuration under spring-compressed state, is closure state under spring extended configuration.
2. the simple and fast anchor of distributed sensing optical cable according to claim 1, it is characterised in that：The flange
The circular hole on disk periphery penetrates one for temperature-compensating and aims at the loose dwelling distributed sensing optical cable (8) of centering.
3. the simple and fast anchor of distributed sensing optical cable according to claim 1, it is characterised in that：Described gold
The opening and closing for belonging to intermediate plate are controlled by optical cable installation folder, when be pressed into for the small cylinder at anchor two ends by optical cable installation folder
In large cylinder, then spring compression, metal intermediate plate is separated from each other, open-shaped state, now passes tight set type to be anchored is distributed
Sensing optical cable (7) is axially inserted into anchor；When optical cable installation folder is unclamped, metal intermediate plate rebounds under spring force,
Metal intermediate plate is in closure state so that tight set type distributed sensing optical cable is clamped.
4. the simple and fast anchor of distributed sensing optical cable according to claim 1, it is characterised in that：The metal
Intermediate plate at least provided with three valves, intermediate plate can folding realize auto-lock function.
5. the simple and fast anchor of distributed sensing optical cable according to claim 1, it is characterised in that：The metal
Clip surface is provided with rubber sheet gasket.
6. the simple and fast anchor of distributed sensing optical cable according to claim 1, it is characterised in that：It is described simple
Quick anchoring device is directly anchored in mounting seat (11) according to detection requirement, mounting seat and tested structure (12)
Surface is fixedly connected；Or direct-burried is in detected concrete or the inside of Rock And Soil (14).
7. the anchoring process of the simple and fast anchor based on any described distributed sensing optical cable of claim 1~6, its
It is characterised by：The small cylinder at simple and fast anchor two ends is pressed into large cylinder with optical cable installation folder first so that spring pressure
Tightly, metal intermediate plate is separated from each other, and tight set type distributed sensing optical cable to be anchored now is axially inserted into simple and fast anchoring
In device；Then optical cable installation folder is unclamped, metal intermediate plate rebounds under spring force so that tight set type distributed sensing light
Cable is clamped；During loose dwelling distributed sensing optical cable to penetrate the circular hole on ring flange again；Above method is repeated, by simple and fast
Anchor is arranged on distributed sensing optical cable to be anchored according to certain spacing, then by distributed sensing optical cable by peace
Dress base is fixed on the surface of tested structure (12), or direct-burried in detected concrete or the inside of Rock And Soil (14), pine set
Type and tight set type distributed sensing optical cable are connected with optical fibre interrogation instrument (13), are monitored reading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710073594.2A CN106679700A (en) | 2017-02-10 | 2017-02-10 | Simple and rapid anchoring method and apparatus of distributive sensing optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710073594.2A CN106679700A (en) | 2017-02-10 | 2017-02-10 | Simple and rapid anchoring method and apparatus of distributive sensing optical cable |
Publications (1)
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|---|---|
| CN106679700A true CN106679700A (en) | 2017-05-17 |
Family
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|---|---|---|---|
| CN201710073594.2A Pending CN106679700A (en) | 2017-02-10 | 2017-02-10 | Simple and rapid anchoring method and apparatus of distributive sensing optical cable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109298496A (en) * | 2018-12-04 | 2019-02-01 | 中国石油化工股份有限公司 | One kind being used for sensing optic cable scene rapid installation device and its installation method |
| CN109613669A (en) * | 2018-12-07 | 2019-04-12 | 东莞理工学院 | The distribution type fiber-optic bracing means and its application method buried in a kind of structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298496A (en) * | 2018-12-04 | 2019-02-01 | 中国石油化工股份有限公司 | One kind being used for sensing optic cable scene rapid installation device and its installation method |
| CN109613669A (en) * | 2018-12-07 | 2019-04-12 | 东莞理工学院 | The distribution type fiber-optic bracing means and its application method buried in a kind of structure |
| CN109613669B (en) * | 2018-12-07 | 2020-10-16 | 东莞理工学院 | Distributed optical fiber reinforcing device with embedded structure and use method thereof |
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