CN103163608A - Optical cable for sensing - Google Patents
Optical cable for sensing Download PDFInfo
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- CN103163608A CN103163608A CN 201110413847 CN201110413847A CN103163608A CN 103163608 A CN103163608 A CN 103163608A CN 201110413847 CN201110413847 CN 201110413847 CN 201110413847 A CN201110413847 A CN 201110413847A CN 103163608 A CN103163608 A CN 103163608A
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- transmission fibers
- metal sheath
- optical cable
- protection layers
- optical fibers
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Abstract
The invention discloses an optical cable for sensing. The optical cable for sensing comprises multiple transmission optical fibers and reinforced parts arranged at centers of the transmission optical fibers. The cross sections of the reinforced parts are cylinder-shaped. Frameworks are arranged on the reinforced parts and extend along the length direction of the reinforced parts. Multiple grooves for the transmission optical fibers to penetrate through are arranged in the frameworks. Metal protection layers are sleeved on the outer surfaces of the frameworks. Outer protection layers are sleeved on the outer surfaces of the metal protection layers. The frameworks, the metal protection layers and the outer protection layers are arranged in a concentric mode. The metal protection layers are single-layer metal protection layers or double-layer metal protection layers. Each groove is provided with four transmission optical fibers. The ratio between a length difference between any two transmission optical fibers and the average length of the two transmission optical fibers is no more than five out of ten thousand. The optical cable for sensing is simple in structure, reasonable in design, low in cost, flexible in use manner, good in use effect, capable of effectively reducing variation of additional loss, caused by environmental factors, of the transmission optical fibers in the cable and wide in market application prospect.
Description
Technical field
The present invention relates to a kind of optical cable, particularly relate to a kind of sensing optical cable.
Background technology
Fibre Optical Sensor has polytype, and wherein intensity adjusting type Fibre Optical Sensor advantage is simple in structure, reliable operation, cheap.But compare with the Fibre Optical Sensor of other types, the major defect of intensity modulation optical fiber sensor is to be subject to environmental interference.Wherein environmental parameter is an importance on the impact of sensor.Modal is the variation of environment temperature.Light source, the Transmission Fibers that is arranged in optical cable, photodiode all can vary with temperature.Light source, photodiode generally are positioned at the test machine room, within its temperature can be controlled at certain scope, and can be compensated by the reference optical fiber passage is set, but the Transmission Fibers that is arranged in optical cable need to extend to the scene, and it varies with temperature the measuring accuracy that the added losses that bring may have a strong impact on whole sensing device.Optical cable mainly is made of the several parts of structure, stiffener, outer jacket of Transmission Fibers, protection Transmission Fibers; wherein the quartz material of Transmission Fibers is partly that coefficient of linear thermal expansion is minimum; the expansion coefficient difference of other several parts is also larger, and in optical cable, little curved increase that causes the Transmission Fibers added losses with buckling phenomenon appears in Transmission Fibers so the variation of temperature makes.And the additional attenuation of the Transmission Fibers that changes is obviously unfavorable to Techniques of Intensity Type Optical Fibre Sensors, there is a kind of method can be by selecting part Transmission Fibers in optical cable as the reference passage, eliminate the additional attenuation that optical cable produces due to environmental change, but the additional attenuation that this Transmission Fibers that will guarantee reference and monitoring produce when the environmental change with Transmission Fibers is approaching, and existing ordinary optical cable to reach such requirement be more difficult.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency of the prior art, a kind of sensing optical cable is provided.This sensing is with cable configuration is simple, reasonable in design, cost is low and use-pattern is flexible, result of use is good, can effectively subdue the variation of the added losses of Transmission Fibers in the optical cable that environmental factor causes, and has wide market application foreground.
for achieving the above object, the technical solution used in the present invention is: a kind of sensing optical cable, it is characterized in that: comprise a plurality of Transmission Fibers and the reinforcement that is positioned at a plurality of Transmission Fibers center, the xsect of described reinforcement is cylindrical, be provided with the skeleton that extends along the reinforcement length direction on described reinforcement, be provided with a plurality of grooves that pass for Transmission Fibers on described skeleton, described skeleton appearance surface cover has metal sheath, the appearance surface cover of described metal sheath has outer jacket, described skeleton, metal sheath and outer jacket arrange with one heart, described metal sheath is single-layer metal sheath or double-level-metal sheath, be provided with four Transmission Fibers in each groove, the length difference of any two Transmission Fibers is not more than 5/10000ths with the ratio of the mean value of these two Transmission Fibers length.
Above-mentioned a kind of sensing optical cable is characterized in that: the quantity of described groove is three, is provided with four Transmission Fibers in each groove.
a kind of sensing optical cable, comprise a plurality of Transmission Fibers and the reinforcement that is positioned at a plurality of Transmission Fibers center, the xsect of described reinforcement is cylindrical, be provided with a plurality of loose sleeve pipes that supply Transmission Fibers to pass around described reinforcement, be provided with gasket for packing between adjacent two loose sleeve pipes, the outer setting of described loose sleeve pipe and gasket for packing has the metal sheath with its parcel, the appearance surface cover of described metal sheath has outer jacket, described metal sheath is single-layer metal sheath or double-level-metal sheath, be provided with four Transmission Fibers in each loose sleeve pipe, the length difference of any two Transmission Fibers is not more than 5/10000ths with the ratio of the mean value of these two Transmission Fibers length.
Above-mentioned a kind of sensing optical cable is characterized in that: the quantity of described loose sleeve pipe is two, is provided with four Transmission Fibers in each loose sleeve pipe.
The present invention compared with prior art has the following advantages:
1, the wire drawing segment length of existing Transmission Fibers generally at tens of kilometer between several hundred kilometers, on same Transmission Fibers, adjacent its optical fiber parameter of part is basic identical, in optical cable of the present invention, guaranteed again the same length of Transmission Fibers in same passage, in each passage, Transmission Fibers just has essentially identical bending or microbend performance, thereby guaranteed when environmental change, the Transmission Fibers of the Transmission Fibers of reference and monitoring use has essentially identical additional attenuation, thereby guaranteed the accuracy based on the fibre-optical sensing device testing result of intensity variation.
2, the chromatic dispersion test instrument is the testing tool of large optical fiber cable factory indispensability, so its testing cost is lower, is suitable for applying.
In sum, cable configuration of the present invention is simple, reasonable in design, processing and fabricating convenient, the low result of use of cost is good, and practical value is high, and in energy effective compensation optical cable, the additional attenuation of Transmission Fibers, have broad application prospects.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the structural representation of the first embodiment of the present invention.
Fig. 2 is the structural representation of the second embodiment of the present invention.
Description of reference numerals:
The 1-reinforcement; The 2-skeleton; The 3-groove;
The 4-Transmission Fibers; The 5-outer jacket; The 6-metal sheath;
The 7-gasket for packing; 8-pine sleeve pipe.
Embodiment
Embodiment 1
a kind of sensing optical cable as shown in Figure 1, comprise a plurality of Transmission Fibers 4 and the reinforcement 1 that is positioned at a plurality of Transmission Fibers 4 centers, the xsect of described reinforcement 1 is cylindrical, be provided with the skeleton 2 that extends along reinforcement 1 length direction on described reinforcement 1, be provided with a plurality of grooves 3 that pass for Transmission Fibers 4 on described skeleton 2, described skeleton 2 appearance surface covers have metal sheath 6, the appearance surface cover of described metal sheath 6 has outer jacket 5, described skeleton 2, metal sheath 6 and outer jacket 5 arrange with one heart, described metal sheath 5 is single-layer metal sheath or double-level-metal sheath, be provided with four Transmission Fibers 4 in each groove 3, the length difference of any two Transmission Fibers 4 is not more than 5/10000ths with the ratio of the mean value of these two Transmission Fibers 4 length.
。Preferred way is that the quantity of described groove 3 is three.
the wire drawing segment length of existing Transmission Fibers 4 generally at tens of kilometer between several hundred kilometers, on same Transmission Fibers 4, adjacent its optical fiber parameter of part is basic identical, in optical cable of the present invention, guaranteed again the same length of the interior Transmission Fibers 4 of same groove 3, in each groove 3, Transmission Fibers 4 just has essentially identical bending or microbend performance, thereby guaranteed when environmental change, the Transmission Fibers 4 of the Transmission Fibers 4 of reference and monitoring use has essentially identical additional attenuation, thereby guaranteed the accuracy based on the fibre-optical sensing device testing result of intensity variation.
Embodiment 2
a kind of sensing optical cable as shown in Figure 2, comprise a plurality of Transmission Fibers 4 and the reinforcement 1 that is positioned at a plurality of Transmission Fibers 4 centers, the xsect of described reinforcement 1 is cylindrical, be provided with a plurality of loose sleeve pipes 8 that supply Transmission Fibers 4 to pass around described reinforcement 1, be provided with gasket for packing 7 between adjacent two loose sleeve pipes 8, the outer setting of described loose sleeve pipe 8 and gasket for packing 7 has the metal sheath 6 with its parcel, the appearance surface cover of described metal sheath 6 has outer jacket 5, described metal sheath 6 is single-layer metal sheath or double-level-metal sheath, be provided with four Transmission Fibers 4 in each loose sleeve pipe 8, the length difference of any two Transmission Fibers 4 is not more than 5/10000ths with the ratio of the mean value of these two Transmission Fibers 4 length.The quantity of described loose sleeve pipe 8 is two.
The above; it is only preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, every according to the technology of the present invention essence to any simple modification, change and equivalent structure transformation that above embodiment does, all still belong in the protection domain of technical solution of the present invention.
Claims (4)
1. sensing optical cable, it is characterized in that: comprise a plurality of Transmission Fibers (4) and be positioned at the reinforcement (1) at a plurality of Transmission Fibers (4) center, the xsect of described reinforcement (1) is cylindrical, be provided with the skeleton (2) that extends along reinforcement (1) length direction on described reinforcement (1), be provided with a plurality of grooves (3) that pass for Transmission Fibers (4) on described skeleton (2), described skeleton (2) appearance surface cover has metal sheath (6), the appearance surface cover of described metal sheath (6) has outer jacket (5), described skeleton (2), metal sheath (6) and outer jacket (5) arrange with one heart, described metal sheath (5) is single-layer metal sheath or double-level-metal sheath, be provided with four Transmission Fibers (4) in each groove (3), the ratio of the mean value of the length difference of any two Transmission Fibers (4) and this two Transmission Fibers (4) length is not more than 5/10000ths.
2. a kind of sensing optical cable according to claim 1, it is characterized in that: the quantity of described groove (3) is three, is provided with four Transmission Fibers (4) in each groove (3).
3. sensing optical cable, it is characterized in that: comprise a plurality of Transmission Fibers (4) and be positioned at the reinforcement (1) at a plurality of Transmission Fibers (4) center, the xsect of described reinforcement (1) is cylindrical, be provided with a plurality of loose sleeve pipes (8) that supply Transmission Fibers (4) to pass around described reinforcement (1), be provided with gasket for packing (7) between adjacent two loose sleeve pipes (8), the outer setting of described loose sleeve pipe (8) and gasket for packing (7) has the metal sheath (6) with its parcel, the appearance surface cover of described metal sheath (6) has outer jacket (5), described metal sheath (6) is single-layer metal sheath or double-level-metal sheath, be provided with four Transmission Fibers (4) in each loose sleeve pipe (8), the ratio of the mean value of the length difference of any two Transmission Fibers (4) and this two Transmission Fibers (4) length is not more than 5/10000ths.
4. a kind of sensing optical cable according to claim 3, it is characterized in that: the quantity of described loose sleeve pipe (8) is two, is provided with four Transmission Fibers (4) in each loose sleeve pipe (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110413847 CN103163608A (en) | 2011-12-12 | 2011-12-12 | Optical cable for sensing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110413847 CN103163608A (en) | 2011-12-12 | 2011-12-12 | Optical cable for sensing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103163608A true CN103163608A (en) | 2013-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110413847 Pending CN103163608A (en) | 2011-12-12 | 2011-12-12 | Optical cable for sensing |
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| CN (1) | CN103163608A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107942456A (en) * | 2018-01-12 | 2018-04-20 | 北京交通大学 | A kind of sensing optic cable for engineering structure monitoring fractures |
| CN110941058A (en) * | 2019-12-12 | 2020-03-31 | 上海传输线研究所（中国电子科技集团公司第二十三研究所） | Equal-time-delay flexible armored optical cable and manufacturing method thereof |
-
2011
- 2011-12-12 CN CN 201110413847 patent/CN103163608A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107942456A (en) * | 2018-01-12 | 2018-04-20 | 北京交通大学 | A kind of sensing optic cable for engineering structure monitoring fractures |
| CN107942456B (en) * | 2018-01-12 | 2019-07-12 | 北京交通大学 | A kind of sensing optic cable for engineering structure monitoring fractures |
| CN110941058A (en) * | 2019-12-12 | 2020-03-31 | 上海传输线研究所（中国电子科技集团公司第二十三研究所） | Equal-time-delay flexible armored optical cable and manufacturing method thereof |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20130619 |