CN104166201A - Strain sensitive type optical fiber distributed sensing power aerial optical cable - Google Patents
Strain sensitive type optical fiber distributed sensing power aerial optical cable Download PDFInfo
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- CN104166201A CN104166201A CN201410397068.8A CN201410397068A CN104166201A CN 104166201 A CN104166201 A CN 104166201A CN 201410397068 A CN201410397068 A CN 201410397068A CN 104166201 A CN104166201 A CN 104166201A
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Abstract
The invention discloses a strain sensitive type optical fiber distributed sensing power aerial optical cable. The optical cable comprises a strain sensing optical unit, a conventional communication optical unit and metal stranded wires. The strain sensing optical unit is arranged at the center of the optical cable, the metal stranded wires are concentrically stranded on the periphery of the strain sensing optical unit, the conventional communication optical unit is implanted into a stranding layer of the metal stranded wires, the number of layers of the metal stranded wires outside the conventional communication optical unit is larger than one, and the metal stranded wires are made from galvanized steel wires or aluminum-coated steel wires or aluminum alloy wires or electrical aluminum wires. The optical cable has the advantages that the defect that a conventional power aerial optical cable can only measure temperature and cannot measure cable strain is overcome, on the premise that the basic structure of the cable is unchanged, the strain sensing optical unit sensitive to the cable strain is implanted into the center of the structure of the cable, distributed sensing of communication, temperature measurement and strain measurement and other functions of the cable are integrated, the structure of the cable is simplified, performance is improved, a measuring system is simplified, and manufacturing cost is reduced.
Description
Technical field
The present invention relates to the electric aerial optical cable such as Optical Fiber composite overhead Ground Wire (OPGW) and optical phase conductor (OPPC), relate in particular to a kind of strain sensitive type distributed fiber-optic sensor electric aerial optical cable.
Background technology
Optical fiber composite overhead optical cable mainly comprises Optical Fiber composite overhead Ground Wire (OPGW) and optical phase conductor (OPPC), and they are all the ingredients of overhead transmission line.In essence, OPGW is that overhead ground wire, OPPC are overhead bare conductors, but they are optical cables again simultaneously, contains the optical fiber originally arranging for communication in cable.
The on-line monitoring technique of transmission line of electricity is one of gordian technique of intelligent grid, is the important research direction that national intelligent grid is built.In modern transmission line of electricity, optical fiber in these composite aerial optical cables connects the whole process of transmission line of electricity, and except for communication, or distribution on line formula is measured the desirable sensing element of the sensings such as temperature and strain.
To conventional electric aerial optical cable (OPGW and OPPC), oneself is proved to be the optical fiber distributed temperature sensing measurement of the technology such as employing fiber grating (FBG), Raman scattering (DTS), Brillouin light Time Domain Reflectometry (BOTDR) and Brillouin optical time domain analysis (BOTDA) effectively, but helpless to strain sensing.This is because fiber strain sensing is different from temperature sensing, requires cable inner fiber to have " perception " ability to the strain of cable, and this perception is " strain transfer " ability of cable structure in fact.And optical fiber in conventional OPGW/OPPC has larger remaining length, has cushioned the transmission of cable strain, therefore they are insensitive to strain in sizable scope.
For the strain of measuring cable, must strain transducer be additionally installed at the bare terminal end of the outside surface of cable or cable, these measures not only make the signal Bian collection of measuring system and transmission become very complicated and unreliable, can only be spot samplings and do not represent the whole process on cable road.How utilizing cable inner fiber distributed earth to measure omnidistance strain, is one of difficult problem perplexing for a long time power circuit worker.
Therefore, need a kind of new technical scheme to address the above problem.
Summary of the invention
The invention provides and a kind of the perception of electric aerial optical cable strain can be started from scratch, be had simultaneously temperature sensing function and meet the strain sensitive type distributed fiber-optic sensor electric aerial optical cable of communicating requirement.
The technical solution used in the present invention: a kind of strain sensitive type distributed fiber-optic sensor electric aerial optical cable comprises strain sensing light unit, general communication light unit and metallic cable, the center of optical cable is located in strain sensing light unit, the periphery concentric stranding metallic cable of strain sensing light unit, in the twisted layer of metallic cable, implant general communication light unit, the metallic cable in outside, general communication light unit is greater than one deck, and the material of metallic cable is galvanized steel wire, aluminum-clad steel wire, aluminium alloy wire or electrician's aluminum steel.
Wherein, strain sensing light unit comprises strain sensing tightly packaged fiber, primary coating fibre I and protection metal pipe I, strain sensing tightly packaged fiber is located at the center of strain sensing light unit, the periphery of strain sensing tightly packaged fiber is provided with primary coating fibre I, the outside of primary coating fibre I is provided with protection metal pipe I, is filled with material water-proof material I in protection metal pipe I; General communication light unit comprises primary coating fibre II, material water-proof material II and protection metal pipe II, and protection metal pipe II inside is provided with primary coating fibre II, is filled with material water-proof material II in protection metal pipe II.
The external diameter of strain sensing tightly packaged fiber is 0.5-1.0mm; The nominal diameter of primary coating fibre I is 0.2-0.3mm, and the circumference of many primary coating fibre compositions and the coverage rate of strain sensing tightly packaged fiber girth are 90%-95%.
Beneficial effect of the present invention: overcome conventional electric power aerial optical cable and can only measure the deficiency that temperature can not measuring cable strain, under the constant prerequisite of cable basic structure, implant the strain sensing light unit to cable strain sensitive at cable structure center, make the several functions such as the distributed sensing of communication, temperature survey and the strain measurement of cable integrated, reduced cable structure, improved performance, simplified measuring system, reduced cost.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the stress-strain test result of strain sensing tightly packaged fiber and primary coating fibre in the present invention;
Fig. 3 is strain testing result of the present invention.
Wherein, 1, strain sensing light unit, 2, general communication light unit, 3, metallic cable; 4, strain sensing tightly packaged fiber, 5, primary coating fibre I, 6, material water-proof material I, 7, protection metal pipe I; 8, primary coating fibre II, 9, material water-proof material II, 10, protection metal pipe II.
Embodiment
In order to make the person skilled of this area understand better the bright technical scheme of we, explain clearly and completely below in conjunction with embodiment and accompanying drawing.
As shown in Figure 1, a kind of strain sensitive type distributed fiber-optic sensor electric aerial optical cable comprises strain sensing light unit 1, general communication light unit 2 and metallic cable 3, the center of optical cable is located in strain sensing light unit 1, the periphery concentric stranding metallic cable 3 of strain sensing light unit 1, in the twisted layer of metallic cable 3, implant general communication light unit 2, the metallic cable 3 in 2 outsides, general communication light unit is no less than one deck, and the material of metallic cable 3 is galvanized steel wire, aluminum-clad steel wire, aluminium alloy wire or electrician's aluminum steel.
Wherein, strain sensing light unit 1 comprises strain sensing tightly packaged fiber 4, primary coating fibre I 5 and protection metal pipe I 7, strain sensing tightly packaged fiber 4 is located at the center of strain sensing light unit 1, the periphery of strain sensing tightly packaged fiber 4 is provided with primary coating fibre I 5, the outside of primary coating fibre I 5 is provided with protection metal pipe I 7, is filled with material water-proof material I 6 in protection metal pipe I 7; General communication light unit 2 comprises primary coating fibre II 8, material water-proof material II 9 and protection metal pipe II 10, and protection metal pipe II 10 inside are provided with primary coating fibre II 8, are filled with material water-proof material II 9 in protection metal pipe II 10.
The material of protection metal pipe adopts stainless steel, aluminium or other applicable metal materials conventionally, in order to obtain suitable excess fiber length, and the manufacture craft of the vertical wrap molding-welding-drawing of sheet metal strip for suitable Bian.The filling rate of the material water-proof material of filling in protection metal pipe should be not less than 70%.
The external diameter of strain sensing tightly packaged fiber 4 is 0.5-1.0mm.Meanwhile, the nominal diameter of primary coating fibre I 5 is 0.2-0.3mm, general color or the colour circle containing being useful on the fine order of identification in surface, and the coverage rate of the circumference that some primary coating fibre I 5 form and strain sensing tightly packaged fiber 4 girths is 90%-95%.
In the manufacturing process of strain sensing light unit 1, should control respectively the remaining length of strain sensing tightly packaged fiber 4 and primary coating fibre I 5, be 100kpsi(1% strain and 1 second to proof strength) optical fiber, the Yu Changying of strain sensing tightly packaged fiber 4 is in 0.10% left and right, Yu Changying >=0.20% of primary coating fibre I 5.Different remaining length requires the different laying tension of available control and other technique to obtain, as long as equipment and technique have enough abilities not to be difficult to apply.Strain sensing optical fiber 4 is exclusively used in the strain of measuring electric aerial optical cable, an optical circuit for Brillouin optical time domain analysis (BOTDA) measuring system in primary coating fibre I 5, remaining can be used for distributed optical fiber temperature measurement and other parameter measurements, also can be used for communication.
The strand of metallic cable 3 adjacent layer in twisted layer is on the contrary, and outermost layer twisted wire is dextrad, between line and interlayer should fill anticorrosion grease.Material selection, radical and the twisted layer number of metallic cable 3 deferred to machinery and the performance such as electric of electric aerial optical cable, and each twisted layer should have suitable twisting pitch.Yu Changying >=0.20% of the primary coating fibre II 8 in the pipe of general communication light unit 2, utilize the twisting pitch of twisted layer to make the comprehensive excess fiber length of primary coating fibre II 8 (the remaining long stranded helix length that adds of pipe inner fiber) >=0.5% in cable, primary coating fibre II 8 in pipe is mainly used in communication, also can be used for distributed optical fiber temperature measurement, but can not be used for surveying strain.
As shown in Figure 2, strain sensing tightly packaged fiber 4 is started from scratch to the reaction of optical cable bearing tension, and to cable, strain is responsive; When applying the stretching resistance 40%(60kN of tension force to this cable) time, fibre strain amount≤0.20%, illustrates that strain sensing tightly packaged fiber 4 can long-term work under the normal stress of cable; And the dependent variable of primary coating fibre I 5 is very little, including strain sensing tightly packaged fiber 4, their added losses are all less than 0.05dB, not only can stably measured and transmission sensing information, even can meet logical credit request.As to further improve strain sensing sensitivity and measure wider dependent variable, it is 200kpsi(2% strain and 1 second that strain sensing tightly packaged fiber 4 should adopt proof strength) high strength optical fiber.
Fig. 3 forms loop with stress sensing tightly packaged fiber 4 and primary coating fibre I 5 in the present invention, the cable strain measured result that utilizes Brillouin optical time domain analysis (BOTDA) measuring system to obtain.As shown in Figure 3, along with the dependent variable of cable is started from scratch, the strain of stress sensing tightly packaged fiber 4 and the stress of cable are almost straight lines, can meet the Strain Distribution formula on-line measurement of electric aerial optical cable.
Beneficial effect of the present invention: overcome conventional electric power aerial optical cable and can only measure the deficiency that temperature can not measuring cable strain, under the constant prerequisite of cable basic structure, implant the strain sensing light unit 1 to cable strain sensitive at cable structure center, make the several functions such as the distributed sensing of communication, temperature survey and the strain measurement of cable integrated, reduced cable structure, improved performance, simplified measuring system, reduced cost.
Claims (8)
1. a strain sensitive type distributed fiber-optic sensor electric aerial optical cable, it is characterized in that: this optical cable comprises strain sensing light unit, general communication light unit and metallic cable, the center of optical cable is located in described strain sensing light unit, the periphery concentric stranding metallic cable of described strain sensing light unit, implants general communication light unit in the twisted layer of described metallic cable.
2. a kind of strain sensitive type distributed fiber-optic sensor electric aerial optical cable according to claim 1; it is characterized in that: described strain sensing light unit comprises strain sensing tightly packaged fiber, primary coating fibre I and protection metal pipe I; described strain sensing tightly packaged fiber is located at the center of strain sensing light unit; the periphery of described strain sensing tightly packaged fiber is provided with primary coating fibre I; the outside of described primary coating fibre I is provided with protection metal pipe I, in described protection metal pipe I, is filled with material water-proof material I.
3. a kind of strain sensitive type distributed fiber-optic sensor electric aerial optical cable according to claim 1; it is characterized in that: described general communication light unit comprises primary coating fibre II, material water-proof material II and protection metal pipe II; described protection metal pipe II inside is provided with primary coating fibre II, in described protection metal pipe II, is filled with material water-proof material II.
4. a kind of strain sensitive type distributed fiber-optic sensor electric aerial optical cable according to claim 1, is characterized in that: the material of described metallic cable is galvanized steel wire, aluminum-clad steel wire, aluminium alloy wire or electrician's aluminum steel.
5. a kind of strain sensitive type distributed fiber-optic sensor electric aerial optical cable according to claim 1, is characterized in that: the metallic cable in outside, described general communication light unit is no less than one deck.
6. a kind of strain sensitive type distributed fiber-optic sensor electric aerial optical cable according to claim 2, is characterized in that: the external diameter of described strain sensing tightly packaged fiber is 0.5-1.0mm.
7. a kind of strain sensitive type distributed fiber-optic sensor electric aerial optical cable according to claim 2, is characterized in that: the nominal diameter of described primary coating fibre is 0.2-0.3mm.
8. a kind of strain sensitive type distributed fiber-optic sensor electric aerial optical cable according to claim 2, is characterized in that: the circumference that many primary coating fibre I of described strain sensing tightly packaged fiber periphery form and the coverage rate of strain sensing tightly packaged fiber girth are 90%-95%.
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| CN201410397068.8A CN104166201A (en) | 2014-08-13 | 2014-08-13 | Strain sensitive type optical fiber distributed sensing power aerial optical cable |
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| CN201410397068.8A CN104166201A (en) | 2014-08-13 | 2014-08-13 | Strain sensitive type optical fiber distributed sensing power aerial optical cable |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538112A (en) * | 2014-12-25 | 2015-04-22 | 广东电网有限责任公司东莞供电局 | Optical fiber composite overhead ground wire and method for measuring temperature distribution of optical fiber composite overhead ground wire |
| CN104678520A (en) * | 2014-12-30 | 2015-06-03 | 江苏通能信息有限公司 | Fire-resistant intelligent micro cable and manufacturing method thereof |
| CN105865497A (en) * | 2016-06-08 | 2016-08-17 | 无锡亚天光电科技有限公司 | Method for using communication optical fiber as distributive sensor |
| CN110082871A (en) * | 2019-04-11 | 2019-08-02 | 江苏通光海洋光电科技有限公司 | A kind of highly sensitive sensor fibre unit and its manufacturing method |
| CN113640930A (en) * | 2021-08-17 | 2021-11-12 | 中国电力科学研究院有限公司 | OPGW optical cable sensing optical fiber optical unit and manufacturing method thereof and optical cable |
-
2014
- 2014-08-13 CN CN201410397068.8A patent/CN104166201A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538112A (en) * | 2014-12-25 | 2015-04-22 | 广东电网有限责任公司东莞供电局 | Optical fiber composite overhead ground wire and method for measuring temperature distribution of optical fiber composite overhead ground wire |
| CN104538112B (en) * | 2014-12-25 | 2016-08-24 | 广东电网有限责任公司东莞供电局 | OPGW and the method measuring its Temperature Distribution |
| CN104678520A (en) * | 2014-12-30 | 2015-06-03 | 江苏通能信息有限公司 | Fire-resistant intelligent micro cable and manufacturing method thereof |
| CN105865497A (en) * | 2016-06-08 | 2016-08-17 | 无锡亚天光电科技有限公司 | Method for using communication optical fiber as distributive sensor |
| CN110082871A (en) * | 2019-04-11 | 2019-08-02 | 江苏通光海洋光电科技有限公司 | A kind of highly sensitive sensor fibre unit and its manufacturing method |
| CN113640930A (en) * | 2021-08-17 | 2021-11-12 | 中国电力科学研究院有限公司 | OPGW optical cable sensing optical fiber optical unit and manufacturing method thereof and optical cable |
| CN113640930B (en) * | 2021-08-17 | 2023-10-13 | 中国电力科学研究院有限公司 | OPGW optical cable sensing optical fiber optical unit, manufacturing method thereof and optical cable |
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Application publication date: 20141126 |
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