CN114019628B - Long-distance sensing optical fiber protection device and protection method - Google Patents
Long-distance sensing optical fiber protection device and protection method Download PDFInfo
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- CN114019628B CN114019628B CN202111016647.XA CN202111016647A CN114019628B CN 114019628 B CN114019628 B CN 114019628B CN 202111016647 A CN202111016647 A CN 202111016647A CN 114019628 B CN114019628 B CN 114019628B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 226
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 28
- 238000009434 installation Methods 0.000 claims abstract description 8
- 239000000725 suspension Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229920002748 Basalt fiber Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 210000001061 forehead Anatomy 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/444—Systems or boxes with surplus lengths
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/444—Systems or boxes with surplus lengths
- G02B6/4441—Boxes
- G02B6/4446—Cable boxes, e.g. splicing boxes with two or more multi fibre cables
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Transform (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The invention discloses a long-distance sensing optical fiber protection device and a protection method, comprising the following steps: the optical fiber installation groove is internally provided with a plurality of optical fiber installation pieces, and the optical fiber installation pieces are used for installing sensing optical fibers; the cover body is detachably connected with the optical fiber mounting groove and forms a closed structure; filling the protection strip between the optical fiber mounting groove and the cover body; the optical fiber mounting groove, the cover body, the filling protection strip and the sensing optical fiber form a combined optical fiber sensor unit; the redundant optical fiber protection bin is arranged between two adjacent combined optical fiber sensor units, and a redundant part of the sensor units after the sensing optical fibers of the sensor units are connected is arranged in the redundant optical fiber protection bin; the device can set up sensing fiber in the optic fibre mounting groove, protects sensing fiber to have redundant optic fibre protection storehouse, can set up the redundant part of sensing fiber between two adjacent combination fiber sensor units, be convenient for long distance sensing fiber's maintenance.
Description
Technical Field
The invention belongs to the technical field of sensing optical fiber protection, and particularly relates to a long-distance sensing optical fiber protection device and a long-distance sensing optical fiber protection method.
Background
With the widespread use of optical fiber sensing, particularly distributed sensing, the distance over which a sensing optical fiber or sensing optical fiber device is installed is becoming longer and longer. In most cases, particularly in the case of distributed sensing, the sensing fiber can be completed by only one common fiber. In the case of optical fibers laid on the surface, it is often necessary to closely attach the structure to be monitored, for example, by means of gluing, curing, etc. However, because the optical fiber structure is very fragile, the optical fiber is easily broken due to various scratches under the condition of no protection, so that the whole system is malfunctioning. For the optical fiber which is completely attached to the surface of the structure, because the optical fiber has no structural redundancy, the broken optical fiber is extremely difficult to repair, and the whole sensing optical fiber is often required to be replaced, so that the construction cost is extremely high.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a long-distance sensing optical fiber protection device and a long-distance sensing optical fiber protection method.
In order to achieve the above object, the present invention provides a long-distance sensing optical fiber protection device, comprising:
the optical fiber sensor comprises an optical fiber mounting groove, wherein a plurality of optical fiber mounting pieces are arranged in the optical fiber mounting groove and are used for mounting sensing optical fibers;
The cover body is detachably connected with the optical fiber mounting groove and forms a closed structure;
a filling protection strip filled between the optical fiber mounting groove and the cover body;
the optical fiber mounting groove, the cover body, the filling protection strip and the sensing optical fiber form a combined optical fiber sensor unit;
and the redundant optical fiber protection bin is arranged between two adjacent combined optical fiber sensor units, and the redundant part of the sensing optical fiber is arranged in the redundant optical fiber protection bin.
Optionally, the redundant optical fiber protection bin is in a sealed box shape, and is used for storing the connecting parts of two adjacent combined optical fiber sensor units; and interconnection interfaces of two adjacent combined optical fiber sensing units are reserved in the redundant optical fiber protection bin.
Optionally, the long-distance sensing optical fiber protection device is used for contacting with a sensed structural device, and the thermal expansion coefficient of the optical fiber mounting groove is the same as that of the sensed structural device.
Optionally, the width of the fiber mounting groove is 1-10cm.
Optionally, the optical fiber mounting member is an optical fiber suspension bracket or a U-shaped groove bracket.
Optionally, the optical fiber suspension bracket includes a first elevation part and an L-shaped part connected to one side of the first elevation part, one end of the L-shaped part is connected to the first elevation part, and a first groove with an open upper end is formed between the L-shaped part and the first elevation part.
Optionally, the U-shaped groove frame comprises a second elevation part and two plane parts connected to one side of the second elevation part, and a second groove body with one side open is formed between the two plane parts.
Optionally, the filler protective strip is a flexible material.
The invention also provides a long-distance sensing optical fiber protection method, which comprises the following steps of:
Acquiring a plurality of combined optical fiber sensor units and a plurality of redundant optical fiber protection bins;
and connecting and attaching the plurality of combined optical fiber sensor units and the plurality of redundant optical fiber protection bins to the sensed structural device.
Optionally, the length of each of the combined fiber optic sensor units is determined according to the environment in which the sensed structural device is located.
The invention provides a long-distance sensing optical fiber protection device and a protection method, which have the beneficial effects that:
1. The device can set the sensing optical fiber in the optical fiber mounting groove to protect the sensing optical fiber, and is provided with a redundant optical fiber protection bin, and a redundant part of the sensing optical fiber can be arranged between two adjacent combined optical fiber sensor units, so that the segmented maintenance and replacement of the long-distance sensing optical fiber are facilitated;
2. The device can fix the sensing optical fiber in the optical fiber mounting groove in a bonding, clamping and other modes, and plays a role in buffering by using the filling protection strip, so that the sensing optical fiber is protected, and damage to the sensing optical fiber caused by scratch is avoided to a certain extent;
3. The method determines the length of each combined optical fiber sensor unit according to the environment of the sensed structural device, divides the long-distance laying facility work of the sensing optical fibers into a plurality of combined optical fiber sensor units and a plurality of redundant optical fiber protection bins, reduces construction difficulty, improves construction efficiency, adopts redundant arrangement of the sensing optical fibers in the redundant optical fiber protection bins, and is convenient to cut off, weld and the like during maintenance.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular descriptions of exemplary embodiments of the invention as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the invention.
Fig. 1 shows an exploded view of a long-distance sensing fiber protection device according to an embodiment of the present invention.
Fig. 2 shows a schematic diagram of a connection structure of a combined optical fiber sensor unit and a redundant optical fiber protection cabin of a long-distance sensing optical fiber protection apparatus according to an embodiment of the present invention.
Fig. 3 shows a schematic structural view of an optical fiber suspension bracket of a long-distance sensing optical fiber protection device according to an embodiment of the present invention.
Fig. 4 shows a schematic side view of a fiber suspension of a long-distance sensing fiber protection device according to an embodiment of the present invention.
Fig. 5 shows a schematic structural diagram of a U-shaped channel of a long distance sensing optical fiber protection device according to another embodiment of the present invention.
Fig. 6 shows a schematic side view of a U-shaped channel of a long distance sensing fiber protection device according to another embodiment of the present invention.
Fig. 7 is a flow chart of a method of protecting a long-distance sensing fiber according to an embodiment of the invention.
Reference numerals illustrate:
1. an optical fiber installation groove; 2. a cover body; 3. filling a protective strip; 4. a combined optical fiber sensor unit; 5. redundant optical fiber protection bin; 6. a first standing surface portion; 7. an L-shaped portion; 8. a second standing surface portion; 9. a planar portion; 10. a first tank body; 11. and a second groove body.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the preferred embodiments of the present invention are described below, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1 to 7, the present invention provides a long-distance sensing optical fiber protection device, which includes:
The optical fiber sensor comprises an optical fiber mounting groove 1, wherein a plurality of optical fiber mounting pieces are arranged in the optical fiber mounting groove 1, and the optical fiber mounting pieces are used for mounting sensing optical fibers;
The cover body 2 is detachably connected with the optical fiber mounting groove 1 and forms a sealing structure;
a filling protection strip 3 is filled between the optical fiber mounting groove 1 and the cover body 2 to provide additional protection for the sensing optical fiber;
the optical fiber mounting groove 1, the cover body 2, the filling protection strip 3 and the sensing optical fiber form a combined optical fiber sensor unit 4;
The redundant optical fiber protection bin 5 is arranged between two adjacent combined optical fiber sensor units 4, and the redundant parts after the sensing optical fibers in the adjacent combined optical fiber sensor units 4 are connected are arranged in the redundant optical fiber protection bin 5.
Specifically, the sensing optical fiber can be installed in the optical fiber installation groove 1 through a plurality of optical fiber installation pieces, the sensing optical fiber can be further fixed and protected by filling the protection strips, the cover body 2 is covered again, the sensing optical fiber is sealed in the optical fiber installation groove 1 to form the combined optical fiber sensor unit 4, the form that a plurality of combined optical fiber sensor units 4 are connected with a plurality of redundant optical fiber protection cabins 5 can be adopted during use, the combined optical fiber sensor units 4 are connected with the redundant optical fiber protection cabins 5 in a staggered manner, the redundant parts after the sensing optical fibers of the combined optical fiber sensor 4 are connected are arranged in the redundant optical fiber protection cabins 5, the length reservation of the sensing optical fiber is formed, and the cutting and welding of the sensing optical fiber are convenient during maintenance.
Further, the cover body 2 is detachably connected with the optical fiber mounting groove 1, can be simply and manually detached, mainly plays a role in water and dust prevention, and the material of the cover body 2 has certain toughness.
In this embodiment, the redundant optical fiber protection bin 5 is in a sealed box shape, and the redundant optical fiber protection bin 5 is used for storing the connection parts of two adjacent combined optical fiber sensor units 4; and interconnection interfaces of two adjacent combined optical fiber sensing units 4 are reserved in the redundant optical fiber protection bin 5.
Specifically, two adjacent combined optical fiber sensor units 4 are all connected to the interfaces on two sides of the redundant optical fiber protection bin 5, the structural form of the interfaces can also be set according to the structure of the optical fiber mounting groove 1, and the connected combined optical fiber sensor units 4 and the redundant optical fiber protection bin 5 are guaranteed to form an integral waterproof sealing shell after connection.
In this embodiment, the long-distance sensing optical fiber protection device is used for contacting with the sensed structural device, and the thermal expansion coefficient of the optical fiber mounting groove 1 is the same as that of the sensed structural device.
Specifically, the optical fiber mounting groove 1 is subjected to material selection according to the structural characteristics of the mounting environment of the optical fiber mounting groove, and has the same thermal expansion coefficient as that of a sensed structural device at the mounting position of the sensing optical fiber, so that the generation of additional stress on the sensing optical fiber device due to the ambient temperature is avoided; for cement basalt fiber fabrics can be used, and for iron pipes stainless steel tanks can be used.
In this embodiment, the width of the fiber mounting groove 1 is 1-10cm.
Specifically, the width of the groove body of the optical fiber mounting groove 1 can be selected to be 1-10cm according to the quantity of the sensing optical fibers.
In this embodiment, the fiber mount is a fiber hanger or a U-shaped channel.
Specifically, the optical fiber mounting groove 1 is internally provided with a plurality of optical fiber hanging frames or U-shaped groove frames which can be used for mounting sensing optical fibers and are used for fixing the sensing optical fibers; in particular, since the sensing optical fiber itself is thin, the optical fiber mounting groove 1 may be in a ribbon form, and does not have to be specially formed in a U-shape having a certain height.
In the present embodiment, the optical fiber suspension bracket includes a first standing surface portion 6 and an L-shaped portion 7 connected to one side of the first standing surface portion 6, one end of the L-shaped portion 7 is connected to the first standing surface portion 6, and a first groove 10 having an upper end opening is formed between the L-shaped portion 7 and the first standing surface portion 6.
In particular, the sensing fiber may be placed in the first tank 10 to be fixed.
In another embodiment, the U-shaped groove frame comprises a second vertical surface part 8 and two plane parts 9 connected to one side of the second vertical surface part 8, and a second groove body 11 with one side open is formed between the two plane parts 9.
Specifically, the sensing optical fiber may be placed in the second groove 11 to be fixed.
In this embodiment, the filler protective strip 3 is a flexible material.
Specifically, the filling protection strip 3 is arranged in the mounting groove to play a role in buffering external force.
The invention also provides a long-distance sensing optical fiber protection method, which comprises the following steps of:
acquiring a plurality of combined optical fiber sensor units 4 and a plurality of redundant optical fiber protection bins 5;
A plurality of combined optical fiber sensor units 4 and a plurality of redundant optical fiber protection bins 5 are connected and attached to the structural device to be sensed.
Specifically, the sensing optical fiber device, the optical fiber mounting groove 1, the cover body 2 and the filling protection strip 3 together form a combined optical fiber sensor unit 4 with protection, replaceable internal sensing optical fiber device and customizable length, the redundant optical fiber protection bin 5 is connected with the combined optical fiber sensor units 4 with different lengths, the joints of the combined optical fiber sensor units are protected, and enough redundant sensing optical fibers for maintenance are reserved in the redundant optical fiber protection bin 5, so that the occurrence of integral replacement of the sensing optical fibers is avoided.
In the present embodiment, the length of each combined optical fiber sensor unit 4 is determined according to the environment in which the structural device to be sensed is located.
In summary, the long-distance sensing optical fiber protection method provided by the invention utilizes the long-distance sensing optical fiber protection device to perform construction: the length of the combined optical fiber sensor unit 4 is selected according to the environmental complexity of the protected area, the length of the single combined optical fiber sensor unit 4 can be selected to be 10-500 m for complex environments which are easy to cause optical fiber damage, such as the vicinity of roads, crossing intersections and the like, and the length of the single combined optical fiber sensor unit 4 can be selected to be 500-1000 m for areas with risk of optical fiber damage but not high, or only unprotected optical fiber sensors are adopted, so that the cost is saved.
The sensing optical fiber is arranged in the optical fiber mounting groove 1 in a mode of bonding, arranging in the first groove body 10 or the second groove body 11 and the like, then arranging the filling protection strip 3, keeping the relaxation of the optical fiber in the mounting process, avoiding the generation of the stress of the forehead, then fastening the cover body 2, and integrally accessing the sensing network as a combined optical fiber sensor unit 4.
A plurality of combined optical fiber sensor units 4 are attached to the sensed structural device, redundant optical fiber protection bins 5 are arranged between the adjacent combined optical fiber sensor units 4, and the installation process is sealed and waterproof to form a whole; the redundant optical fiber protection bin 5 comprises interfaces of adjacent combined optical fiber sensor units 4; the sensor fiber leaves a margin in the redundant fiber protection bin 5 for cutting and welding during maintenance.
When the wiring is finished and the sensing optical fiber is positioned, the delay of the redundant optical fiber is considered, and the sensing software is correspondingly set.
When in maintenance, if the sensing optical fiber is damaged, new sensing optical fiber can be rearranged in the combined optical fiber sensor unit 4 where the sensing optical fiber is positioned, and fusion protection is carried out through the reserved length of the redundant sensing optical fiber in the redundant optical fiber protection bin 5, which is equivalent to replacing the sensing optical fiber in one combined optical fiber sensor unit 4 damaged by the sensing optical fiber instead of the whole sensing optical fiber, thereby saving the cost, particularly the construction cost.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.
Claims (8)
1. A long-distance sensing fiber optic protection device for contacting a sensed structural device, the device comprising:
The optical fiber mounting groove is internally provided with a plurality of optical fiber mounting pieces, the optical fiber mounting pieces are used for mounting sensing optical fibers, and the thermal expansion coefficient of the optical fiber mounting groove is the same as that of the sensed structural device;
The cover body is detachably connected with the optical fiber mounting groove and forms a closed structure;
the filling protection strip is filled between the optical fiber mounting groove and the cover body, is arranged in the mounting groove and is used for further fixing and protecting the sensing optical fiber;
the optical fiber mounting groove, the cover body, the filling protection strip and the sensing optical fiber form a combined optical fiber sensor unit;
The redundant optical fiber protection bin is arranged between two adjacent combined optical fiber sensor units, and the redundant part of the sensing optical fiber is arranged in the redundant optical fiber protection bin;
The combined optical fiber sensor units are connected with the redundant optical fiber protection bins in a staggered manner to form the length reservation of the sensing optical fibers;
The redundant optical fiber protection bin is in a sealed box shape and is used for storing the connecting parts of two adjacent combined optical fiber sensor units; and interconnection interfaces of two adjacent combined optical fiber sensor units are reserved in the redundant optical fiber protection bin.
2. The long-distance sensing optical fiber protection device according to claim 1, wherein the optical fiber installation groove has a width of 1-10cm.
3. The long-distance sensing fiber protection device of claim 1, wherein the fiber mount is a fiber hanger or a U-shaped channel.
4. The long-distance sensing optical fiber protection device according to claim 3, wherein the optical fiber suspension bracket comprises a first vertical surface part and an L-shaped part connected to one side of the first vertical surface part, one end of the L-shaped part is connected with the first vertical surface part, and a first groove body with an upper end opening is formed between the L-shaped part and the first vertical surface part.
5. The long-distance sensing optical fiber protection device according to claim 3, wherein the U-shaped groove frame comprises a second vertical surface part and two plane parts connected to one side of the second vertical surface part, and a second groove body with one side opened is formed between the two plane parts.
6. The long-distance sensing fiber optic protection device of claim 1, wherein the filler protective strip is a flexible material.
7. A long distance sensing optical fiber protection method using the long distance sensing optical fiber protection device according to any one of claims 1 to 6, characterized in that the method comprises:
Acquiring a plurality of combined optical fiber sensor units and a plurality of redundant optical fiber protection bins;
and connecting and attaching the plurality of combined optical fiber sensor units and the plurality of redundant optical fiber protection bins to the sensed structural device.
8. The method of claim 7, wherein the length of each of the combined fiber optic sensor units is determined based on the environment in which the sensed structural device is located.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111016647.XA CN114019628B (en) | 2021-08-31 | 2021-08-31 | Long-distance sensing optical fiber protection device and protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111016647.XA CN114019628B (en) | 2021-08-31 | 2021-08-31 | Long-distance sensing optical fiber protection device and protection method |
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| Publication Number | Publication Date |
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| CN114019628A CN114019628A (en) | 2022-02-08 |
| CN114019628B true CN114019628B (en) | 2024-05-31 |
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|---|---|---|---|---|
| KR20090041276A (en) * | 2007-10-23 | 2009-04-28 | (주)지엠지 | Apparatus for measurement of pipe |
| CN101943773A (en) * | 2009-07-07 | 2011-01-12 | 3M创新有限公司 | Micro-connecting disk |
| CN106482657A (en) * | 2016-10-10 | 2017-03-08 | 武汉理工大学 | Fiber grating dynamic strain sensor-packaging structure and method |
| CN207147667U (en) * | 2017-09-20 | 2018-03-27 | 广州大学 | A kind of back-shaped strip sensor of carbon fiber prepreg encapsulation |
| CN108426591A (en) * | 2018-01-30 | 2018-08-21 | 哈尔滨工业大学 | Fiber-optic grating sensor encapsulating structure and packaging method suitable for hot environment |
| CN213042030U (en) * | 2020-08-03 | 2021-04-23 | 深圳市飞速创新技术股份有限公司 | Optical fiber connection protection device |
-
2021
- 2021-08-31 CN CN202111016647.XA patent/CN114019628B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090041276A (en) * | 2007-10-23 | 2009-04-28 | (주)지엠지 | Apparatus for measurement of pipe |
| CN101943773A (en) * | 2009-07-07 | 2011-01-12 | 3M创新有限公司 | Micro-connecting disk |
| CN106482657A (en) * | 2016-10-10 | 2017-03-08 | 武汉理工大学 | Fiber grating dynamic strain sensor-packaging structure and method |
| CN207147667U (en) * | 2017-09-20 | 2018-03-27 | 广州大学 | A kind of back-shaped strip sensor of carbon fiber prepreg encapsulation |
| CN108426591A (en) * | 2018-01-30 | 2018-08-21 | 哈尔滨工业大学 | Fiber-optic grating sensor encapsulating structure and packaging method suitable for hot environment |
| CN213042030U (en) * | 2020-08-03 | 2021-04-23 | 深圳市飞速创新技术股份有限公司 | Optical fiber connection protection device |
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| CN114019628A (en) | 2022-02-08 |
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