CN215676895U - Sensing optical cable structure for distributed optical fiber strain measurement - Google Patents
Sensing optical cable structure for distributed optical fiber strain measurement Download PDFInfo
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- CN215676895U CN215676895U CN202120903092.XU CN202120903092U CN215676895U CN 215676895 U CN215676895 U CN 215676895U CN 202120903092 U CN202120903092 U CN 202120903092U CN 215676895 U CN215676895 U CN 215676895U
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- Prior art keywords
- optical fiber
- sensing
- fiber core
- cable structure
- optical cable
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 23
- 230000003287 optical effect Effects 0.000 title claims abstract description 19
- 238000005259 measurement Methods 0.000 title claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 37
- 239000000945 filler Substances 0.000 claims abstract description 14
- 238000005253 cladding Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of optical fiber sensing, in particular to a sensing optical cable structure for distributed optical fiber strain measurement. The sensing optical cable structure for distributed optical fiber strain measurement comprises a fiber core and an outer sheath which are arranged from inside to outside, wherein an insulating outer sleeve is wrapped outside the fiber core, and a voltage-sharing filler is filled between the fiber core and the outer sheath. The advantages are that: the protection to optic fibre has been strengthened through the design of voltage-sharing filler, can be used to the measurement optic fibre strain characteristic, and the test accuracy is accurate, utilizes the voltage-sharing filler to share the pressure of point equally, and overall sensitivity is high than traditional sensing optical cable, is applicable to various optical fiber sensing fields.
Description
Technical Field
The utility model relates to the technical field of optical fiber sensing, in particular to a sensing optical cable structure for distributed optical fiber strain measurement.
Background
In scientific research projects, because the change of the refractive index of the optical fiber caused by external parameters has linear and nonlinear relations with temperature and strain, the physical properties of the same optical fiber are fluctuated under different environments. In practical use, if the strain sensitivity of the optical fiber is too low, the problems of not only accurate test values, but also damage of the optical fiber and the like can be caused.
The fiber core structure in the traditional optical cable directly contacts the outer sheath, when the fiber core structure is pressed by external force at a certain point, the fiber core structure can indirectly act on the certain point, and the refractive index of the fiber core can be seriously influenced, so that the measurement result is inaccurate.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a sensing optical cable structure for distributed optical fiber strain measurement, which effectively overcomes the defects of the prior art.
The technical scheme for solving the technical problems is as follows:
the utility model provides a distributed optical fiber strain measurement's sensing optical cable structure, includes by interior and outer sheath that sets up, the outer parcel of above-mentioned fibre core is equipped with insulating overcoat, and it has the voltage-sharing filler to fill between above-mentioned fibre core and the above-mentioned outer sheath.
On the basis of the technical scheme, the utility model can be further improved as follows.
Further, the insulating outer sleeve comprises an insulating cladding and an inner layer sheath which wrap the fiber core from inside to outside in sequence.
Further, the pressure equalizing filler is a plastic rod arranged along the length direction of the optical cable.
Furthermore, a plurality of plastic rods are arranged and surround the fiber core, and adjacent plastic rods are in contact with each other.
Further, the cross section of the plastic rod is circular.
Furthermore, 6-8 plastic rods are arranged.
The utility model has the beneficial effects that: the protection to optic fibre has been strengthened through the design of voltage-sharing filler, can be used to the measurement optic fibre strain characteristic, and the test accuracy is accurate, utilizes the voltage-sharing filler to share the pressure of point equally, and overall sensitivity is high than traditional sensing optical cable, is applicable to various optical fiber sensing fields.
Drawings
Fig. 1 is a cross-sectional view of a sensing cable structure for distributed optical fiber strain measurement according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a fiber core; 2. an outer sheath; 3. pressure-equalizing filling; 11. an insulating outer sleeve; 111. an insulating cladding; 112. an inner jacket.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.
Example (b): as shown in fig. 1, the sensing optical cable structure for distributed optical fiber strain measurement according to the present embodiment includes a fiber core 1 and an outer sheath 2 arranged from inside to outside, an insulating outer jacket 11 is wrapped outside the fiber core 1, and a voltage-equalizing filler 3 is filled between the fiber core 1 and the outer sheath 2.
In this embodiment, pack 3 through setting up the voltage-sharing between fibre core 1 and the outer sheath 2 and come to protect the fibre core and the dispersion of effort, when receiving non-destructive external extrusion at certain point of optical cable, this extrusion force is transmitted to voltage-sharing through outer sheath 2 and is packed 3 and carry out the dispersion of power, finally when transmitting fibre core 1, the effort will be dispersed, avoid receiving the effort influence of point location, ensure that the optical signal transmission of fibre core 1 does not receive great influence, whole design has strengthened the protection to optic fibre through voltage-sharing filler 3, can be used to measure optic fibre strain characteristic, it is accurate to test the accuracy, utilize the voltage-sharing filler to share the pressure of point equally, the relatively traditional sensing optical cable of overall sensitivity is high, and the optical fiber sensing field is applicable to various optic fibre sensing.
In a preferred embodiment, the insulating jacket 11 includes an insulating cladding 111 and an inner sheath 112 that sequentially wrap the core 1 from inside to outside.
In this embodiment, the insulating cladding 111 can perform an insulating function, and the inner sheath 112 can also buffer and disperse the pressure transmitted from the outside to some extent, so as to reduce the acting force applied to the core 1 and sufficiently protect the core 1.
Preferably, the pressure equalizing filler 3 is a plastic rod disposed along the length of the optical cable.
In the scheme, the optical cable and the plastic rod are stirred together, so that the protection of the optical fiber is enhanced, the optical fiber strain characteristic can be measured, and the test accuracy is accurate.
Preferably, the plurality of plastic rods are arranged and surrounded outside the fiber core 1, and adjacent plastic rods are in contact with each other.
In this scheme, the edge of plastic rod is laminated each other, covers the parcel in fibre core 1 outside comprehensively, and barrier propterty is better.
Preferably, the plastic rod has a circular cross-section.
In the scheme, the inner side of the plastic rod is tightly attached to the inner layer sheath 112 outside the fiber core 1, the outer side of the plastic rod is tightly attached to the inner surface of the outer layer sheath 2, the filling structure is compact, and the protection performance is better.
Generally, the number of plastic rods surrounding the outside of the core 1 is generally designed to be 6-8, which provides better protection for the core 1.
Of course, the region between the plastic rod and the plastic and the region between the plastic rod and the outer sheath 2 may be filled with some other flexible filler to further improve the protection of the inner part of the outer sheath 2 against the fiber core 1.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (3)
1. The utility model provides a distributed optical fiber strain measurement's sensing optical cable structure which characterized in that: the fiber core comprises a fiber core (1) and an outer layer sheath (2) which are arranged from inside to outside, wherein an insulating outer sleeve (11) is wrapped outside the fiber core (1), and a voltage-sharing filler (3) is filled between the fiber core (1) and the outer layer sheath (2); the insulating outer sleeve (11) comprises an insulating cladding (111) and an inner layer sheath (112) which sequentially wrap the fiber core (1) from inside to outside; the pressure-equalizing filler (3) is a plastic rod arranged along the length direction of the optical cable; the plastic rods are provided with a plurality of plastic rods and surround the fiber core (1), and adjacent plastic rods are in mutual contact; the inner side of the plastic rod is tightly attached to the inner layer sheath (112) outside the fiber core (1), and the outer side of the plastic rod is tightly attached to the inner surface of the outer layer sheath (2).
2. A sensing cable structure for distributed optical fiber strain measurement according to claim 1, wherein: the section of the plastic rod is circular.
3. A sensing cable structure for distributed optical fiber strain measurement according to claim 1, wherein: the plastic rods are provided with 6-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120903092.XU CN215676895U (en) | 2021-04-28 | 2021-04-28 | Sensing optical cable structure for distributed optical fiber strain measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120903092.XU CN215676895U (en) | 2021-04-28 | 2021-04-28 | Sensing optical cable structure for distributed optical fiber strain measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215676895U true CN215676895U (en) | 2022-01-28 |
Family
ID=79971179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120903092.XU Expired - Fee Related CN215676895U (en) | 2021-04-28 | 2021-04-28 | Sensing optical cable structure for distributed optical fiber strain measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215676895U (en) |
-
2021
- 2021-04-28 CN CN202120903092.XU patent/CN215676895U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220128 |