CN102288125A - Metal-based cable distributed optical fiber sensor - Google Patents
Metal-based cable distributed optical fiber sensor Download PDFInfo
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- CN102288125A CN102288125A CN201110212087.5A CN201110212087A CN102288125A CN 102288125 A CN102288125 A CN 102288125A CN 201110212087 A CN201110212087 A CN 201110212087A CN 102288125 A CN102288125 A CN 102288125A
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Abstract
The invention relates to a metal-based cable distributed optical fiber sensor. A central sensing optical fiber with a jacket is twisted and encircled in a core part by ambient six metal wires to form the metal-based cable distributed optical fiber sensor; particularly the sensing optical fiber with the jacket has the same diameter as the metal wires and is tightly wrapped and contacted with the ambient six metal wires; an external steel wire bundle encircles and winds the central sensing optical fiber in a spiral mode, and the central sensing optical fiber is kept in a straight line shape and is not wound; and an optical fiber (cable) positioned in the center of a cable is tightly wound by six steel wires with matched diameter in the spiral mode to form a metal cable body capable of directly sensing strain and temperature. The sensing optical cable with the structure ensures that the optical fiber is tightly contacted with the ambient reinforced steel wires and an object to be monitored, and realizes the distributed monitoring of stress and strain of a steel wire rope and the ambient object to be monitored; meanwhile, the fine and tender sensing optical fiber is protected by high-strength steel wires, so that the tensile strength, shock damage resistance and bending resistance of the sensing optical fiber are obviously improved.
Description
Technical field
The present invention relates to the distributing optical fiber sensing technology, belong to sensor technical field.
Background technology
The distributing optical fiber sensing technology is novel monitoring technology and the method that grows up in the world in recent years, it in actual monitoring is used, not only have optical fiber advantages such as intrinsic anti-electromagnetic interference (EMI), corrosion-resistant, good endurance, volume be little, in light weight, also have numerous advantages such as distributed, long distance, enjoy the scientific and technical personnel in engineering monitoring field to favor day by day.The distributing optical fiber sensing technology relies on it can realize the extraction of relevant information in the large-range measuring field and be subjected to widespread use, realized the breakthrough of the numerous measurement difficult problems of present fields of measurement, such as: the distributed strain sensor can be used for the safety detection of facilities such as bridge, dykes and dams, side slope, structures pile foundation, tunnel at present, in fields such as space flight, aviation field, intellectual material preparations related application is arranged also; Distributed temperature sensor can be used for the temperature distributing measuring of hydroelectricity generator group, oil well at present, fields such as the fire protection of bulk storage plant, oil depot, skyscraper, tunnel and mine and warning system.
The very thin fragility of optical fiber self, and it is loaded down with trivial details to continue, and in engineering laying construction and later stage observation process, very easily wrecks, and it is used in the engineering monitoring field be very limited.The sensing optic cable that uses in the monitoring field mostly adopts ready-made communication cable and cable and optical cable at present; it is characterized in that making itself and extraneous distortion and heat form fine isolation by loose nested structure; add hard overcoat; make inner fibre core obtain arriving very much effectively protection, but this type optical fiber can't carry out effective conduction test to strain and temperature.Tight-buffered fiber optic cables such as part covered wire cable, self-support cable and GFRP optical cable also are used to sensing, but himself intensity fragility also can't be used in actual engineering scale.Therefore along with the continuous expansion of monitoring requirements, develop out that survivability is strong, construction is simple, the superior hard-pressed bale sensing optic cable of sensing capabilities has great meaning.
In addition, all kinds of cables that are twisted into by tinsel have obtained widespread use in engineering, the internal force of cable body, corrosion and damage monitoring are difficult point problems always, sensor is implanted to tests monitoring in the cable and be a kind of advanced person's method and technology, intelligent cable fiber grating strain sensor as patent 200910145153.4 inventions, fiber grating is implanted in the cable, carried out multipoint mode temperature/strain monitoring.If distributed sensor optical fiber is implanted in the cable synchronously in the stranding process, form intelligent cable, realize distributed testing to the degree/strain of cable body temperature, be a great novelty technological breakthrough to the safety monitoring of cable.
The present invention is based on the basis of distributed fiberoptic sensor technology; distributed sensing fiber is implanted wherein in the cable manufacture process synchronously; tighten the bag protection by peripheral steel wire; inventing out not only can be to the intelligent cable of self internal force and the effective distributed monitoring of temperature, but also can be used for the sensing optic cable of numerous engineering body distributed securitys monitorings.
Summary of the invention
The present invention seeks to: (1) solves Fibre Optical Sensor and uses the problem that is very limited in the engineering monitoring field; overcome the numerous deficiencies of prior art in application; ordinary optic fibre is carried out the special package protection; form a kind of tight cover distributed sensing optical cable convenient, that tensile strength is high of installing, actual effect, susceptibility and convenience when significantly improving the distributing optical fiber sensing technology and using in the engineering detecting field.(2) by optical fiber being implanted the cable body, realize monitoring, solved the difficult problem of cable body monitoring cable self internal force and Temperature Distribution.
Technical scheme of the present invention is: a kind of distributed fiberoptic sensor, the center sensor fibre that has sheath is surrounded around core by 6 one metal wires twisting on every side, constitutes Metal Substrate rope distributed fiberoptic sensor.
Improvement of the present invention is: the sensor fibre that has sheath is identical with diameter wiry, contacts with 6 one metal wire hard-pressed bales on every side.The outer steel tow is to surround winding center sensor fibre with spiral form, and the center sensor fibre keeps straight line not twine.
The center sensor fibre is provided with elasticity and ductility sheath.
Sensor fibre is the optical fiber of multimode or single mode, and structure is single core or multicore structure.
Sensor fibre is tight tube fiber or uses loosely shielded optical cable when the independent target monitoring of temperature sensing.
The present invention absorbs steel strand wires and steel cable production technology; to have be complementary single mode or multimode optical fiber of sheath and diameter and twisted wire and replace original central metal steel wire (silk); utilize peripheral 6 one metal wires twisting to be wrapped in protection, form Metal Substrate rope distributing optical fiber sensing cable as shown in Figure 1.Carry out the demodulation test by Brillouin's optical time domain reflection technology (BOTDR), stimulated Brillouin optical time-domain analysis technology (BOTDA) and Raman light time domain lift-off technology (ROTDR) distributed optical fiber sensing technology, reach the purpose of distributed monitoring.
Metal Substrate strand distributing optical fiber sensing of the present invention not only can be tested cable self strain, and can bury underground to build and in concrete and rock soil mass, carry out engineering body internal stress strain monitoring, or by anchor clamps the measured object surface is installed and carries out distributed strain, temperature monitoring.
The present invention has following sensing feature,
1, distributed sensing feature: the distributed sensing technology is adopted in the sensor demodulation, and promptly the last point of strand sensor is sensing point.2, multiple goal monitoring: the sensor fibre in the sheath can adopt tight cover single-mode fiber, pine cover single-mode fiber, multimode optical fiber etc. to satisfy different demodulation techniques and sensing purpose, monitoring when also can put into polytype fibre core realization distortion with temperature simultaneously.
The invention has the beneficial effects as follows:
1, the spiral-shaped of metal steel wire strand can tightly surround inner fibre core, promotes the coupling of itself and testee, improves the transitivity of strain;
2, can be twisted into the sensing twisted wire of various adaptation diameters according to the actual requirements, be fit to the various objectives demand;
3, the metallic steel tow of outsourcing has very big tension and rupture strength, the complete sensor fibre at covering protection center dimensionally, sensor fibre that can the better protection center; The protection of the special package of metal steel wire strand can increase substantially Fibre Optical Sensor when using in the engineering detecting field survival rate and sensitivity.
4, accelerated interior core fibre reaction time of temperature to external world, promoted the ageing of temperature monitoring.
In a word, the present invention has realized using in the environment of some inclement conditions; Utilize the fast metal reinforcement overcoat parcel of heat conduction in addition, heat-conductive characteristic is special to promoting, and the response time is effectively shortened, and has promoted the validity of distributed temperature measuring system.The distributed sensing optical cable of this structure can supporting BOTDR, BOTDA, ROTDR and OTDR distributed optical fiber sensing technology use, and has good, highly sensitive, the characteristics such as intensity is high, installation is convenient, distributed monitoring of distortion coupling.Can be used for tunnel, bridge, dam and etc. the distributed monitoring of contents such as surface strain, internal modification and temperature of engineering body; Can be used for side slope anchor cable, concrete pre-stress rope, promote cable wire body internal force monitorings such as cable and bridge cable; Also can be used as the signal transmission cable of other optical fiber sensing systems such as fiber grating, white light interference.
Description of drawings
Fig. 1 object construction figure of the present invention.
Fig. 2 cross section structure synoptic diagram of the present invention.
Embodiment
The material of metal strand possesses certain intensity, satisfies requirements such as certain ductility, deformability, machinability and corrosion resistivity.Described tinsel is a steel wire, also can copper, the tinsel of metal preparations such as aluminium, stainless steel.As shown in the figure: 1 steel tendon, 2 band jacket fibers, 3 overlays, 4 coverings, 5 fiber cores.Its implementation process is:
(1) preparation sensing fibre core
Used sensing fibre core is common single mode or multimode fibre core among the present invention, the hard-pressed bale structure, and its diameter is 1/3 of the stranding diameter of wanting, or bigger, closely contacts deform in same pace in strand system inner fibre core later with the outer layer metal steel wire so that can guarantee.The surrounding layer of optical fiber has certain elasticity, can play the effect of buffering ambient pressure, prevents fibre core crush injury in strand system process.According to the test purpose difference, fibre core also can adopt multicore structure.
(2) the stranded implantation of optical fiber
The sensor fibre that has sheath is positioned over the center of 7 core twisted wires, and 6 one metal wires are stranded according to unified direction and certain angle in its periphery, tightly on the straight sensor fibre that has sheath, form a rope form or strand.In this implementation process, it is straight line that sensor fibre keeps always, has guaranteed the smoothness of its light path.This process implements to utilize general wire twisting machine to realize, also can utilize the metal cords that has presented by tearing the mode of closing open the sensing fibre core to be implanted in the twisted wire.Its section structure of stranded back shown in Fig. 2,6 diameter steel tendons 1 identical with the sensor fibre that has sheath be enclosed in closely optical fiber jacket 2 around, make them obtain the distortion of coordination.The cable of stranded good optical fiber also can be used as the inside center sensing optic cable, is twisted into the thicker cable of diameter once more.
(3) install
After the sensing optic cable processing, can by direct colligation on steel reinforcement cage, build, also can adopt the anchor clamps fixed form, be installed in the determinand surface as in the concrete.
Claims (6)
1. a distributed fiberoptic sensor is characterized in that the center sensor fibre that has sheath is surrounded around core by 6 one metal wires twisting on every side, constitutes Metal Substrate rope distributed fiberoptic sensor.
2. distributed fiberoptic sensor according to claim 1, the sensor fibre that it is characterized in that having sheath is identical with diameter wiry, contacts with 6 one metal wire hard-pressed bales on every side.
3. distributed sensor according to claim 1 is characterized in that the outer steel tow is to surround winding center sensor fibre with spiral form, and the center sensor fibre keeps straight line not twine.
4. according to the described distributed sensor of claim 1, it is characterized in that the center sensor fibre is provided with elasticity and ductility sheath.
5. according to claims 1 or 3 described distributed sensors, it is characterized in that sensor fibre is the optical fiber of multimode or single mode, structure is single core or multicore structure.
6. according to claims 1 or 3 described distributed sensors, it is characterized in that sensor fibre is a tight tube fiber, or loosely shielded optical cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110212087.5A CN102288125A (en) | 2011-07-27 | 2011-07-27 | Metal-based cable distributed optical fiber sensor |
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| CN201110212087.5A CN102288125A (en) | 2011-07-27 | 2011-07-27 | Metal-based cable distributed optical fiber sensor |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819079A (en) * | 2012-08-17 | 2012-12-12 | 苏州南智传感科技有限公司 | Tight tube optical fiber grating serial sensing optical cable |
| CN102830476A (en) * | 2012-08-14 | 2012-12-19 | 东南大学 | Sensor optical fiber |
| CN103604382A (en) * | 2013-11-01 | 2014-02-26 | 河海大学 | Bellows-distributed optical fiber measuring sensor |
| CN105823496A (en) * | 2015-01-22 | 2016-08-03 | 西安金和光学科技有限公司 | Linear optical fiber sensing device |
| CN105863701A (en) * | 2016-05-30 | 2016-08-17 | 辽宁工程技术大学 | Anchor rod sensor |
| CN106767479A (en) * | 2016-12-20 | 2017-05-31 | 中国船舶重工集团公司第七〇五研究所 | A kind of smart stay cable for the monitoring of bridge distributive fiber optic strain |
| CN106885529A (en) * | 2017-04-26 | 2017-06-23 | 大连理工大学 | A kind of long-distance distributed optical fiber spatial attitude monitors sensor and engineering implementation method |
| CN108088593A (en) * | 2017-12-26 | 2018-05-29 | 浙锚科技股份有限公司 | Intelligent carbon fiber cable body |
| CN109239877A (en) * | 2018-10-11 | 2019-01-18 | 三峡大学 | A kind of ess-strain optical cable based on ultrashort dim light grid array |
| CN109827518A (en) * | 2017-11-23 | 2019-05-31 | 桂林电子科技大学 | Fiber integrated interferometer parallel-connection structure three-dimensional spatial distribution formula changing sensor |
| CN110017774A (en) * | 2019-05-14 | 2019-07-16 | 天地科技股份有限公司上海分公司 | 3 d pose detection cable formula sensor |
| CN110323654A (en) * | 2018-03-31 | 2019-10-11 | 深圳市创鑫激光股份有限公司 | Laser export head and laser |
| CN117331172A (en) * | 2023-11-07 | 2024-01-02 | 楚胜汽车集团有限公司 | Optical fiber mechanical fuse connector for dangerous chemical tank type transport vehicle and connecting method |
| CN117738386A (en) * | 2024-02-18 | 2024-03-22 | 北京市建筑工程研究院有限责任公司 | Fiber bragg grating intelligent steel strand and prestress structure member for building |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10333002A (en) * | 1997-05-29 | 1998-12-18 | Sumitomo Electric Ind Ltd | Optical cable |
| CN101245988A (en) * | 2008-03-24 | 2008-08-20 | 哈尔滨工业大学 | Pre-stress damage monitoring method based on optical fiber Brillouin full-dimension sensing |
-
2011
- 2011-07-27 CN CN201110212087.5A patent/CN102288125A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10333002A (en) * | 1997-05-29 | 1998-12-18 | Sumitomo Electric Ind Ltd | Optical cable |
| CN101245988A (en) * | 2008-03-24 | 2008-08-20 | 哈尔滨工业大学 | Pre-stress damage monitoring method based on optical fiber Brillouin full-dimension sensing |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830476A (en) * | 2012-08-14 | 2012-12-19 | 东南大学 | Sensor optical fiber |
| CN102819079A (en) * | 2012-08-17 | 2012-12-12 | 苏州南智传感科技有限公司 | Tight tube optical fiber grating serial sensing optical cable |
| CN103604382A (en) * | 2013-11-01 | 2014-02-26 | 河海大学 | Bellows-distributed optical fiber measuring sensor |
| CN105823496A (en) * | 2015-01-22 | 2016-08-03 | 西安金和光学科技有限公司 | Linear optical fiber sensing device |
| CN105863701A (en) * | 2016-05-30 | 2016-08-17 | 辽宁工程技术大学 | Anchor rod sensor |
| CN105863701B (en) * | 2016-05-30 | 2018-01-30 | 辽宁工程技术大学 | A kind of anchor sensor |
| CN106767479A (en) * | 2016-12-20 | 2017-05-31 | 中国船舶重工集团公司第七〇五研究所 | A kind of smart stay cable for the monitoring of bridge distributive fiber optic strain |
| CN106885529A (en) * | 2017-04-26 | 2017-06-23 | 大连理工大学 | A kind of long-distance distributed optical fiber spatial attitude monitors sensor and engineering implementation method |
| CN109827518A (en) * | 2017-11-23 | 2019-05-31 | 桂林电子科技大学 | Fiber integrated interferometer parallel-connection structure three-dimensional spatial distribution formula changing sensor |
| CN108088593A (en) * | 2017-12-26 | 2018-05-29 | 浙锚科技股份有限公司 | Intelligent carbon fiber cable body |
| CN108088593B (en) * | 2017-12-26 | 2024-05-28 | 浙锚科技股份有限公司 | Carbon fiber intelligent rope body |
| CN110323654A (en) * | 2018-03-31 | 2019-10-11 | 深圳市创鑫激光股份有限公司 | Laser export head and laser |
| CN109239877A (en) * | 2018-10-11 | 2019-01-18 | 三峡大学 | A kind of ess-strain optical cable based on ultrashort dim light grid array |
| CN109239877B (en) * | 2018-10-11 | 2024-06-11 | 三峡大学 | Stress-strain optical cable based on ultra-short weak grating array |
| CN110017774A (en) * | 2019-05-14 | 2019-07-16 | 天地科技股份有限公司上海分公司 | 3 d pose detection cable formula sensor |
| CN117331172A (en) * | 2023-11-07 | 2024-01-02 | 楚胜汽车集团有限公司 | Optical fiber mechanical fuse connector for dangerous chemical tank type transport vehicle and connecting method |
| CN117331172B (en) * | 2023-11-07 | 2024-04-30 | 楚胜汽车集团有限公司 | Optical fiber mechanical fuse connector for dangerous chemical tank type transport vehicle and connecting method |
| CN117738386A (en) * | 2024-02-18 | 2024-03-22 | 北京市建筑工程研究院有限责任公司 | Fiber bragg grating intelligent steel strand and prestress structure member for building |
| CN117738386B (en) * | 2024-02-18 | 2024-05-07 | 北京市建筑工程研究院有限责任公司 | Fiber bragg grating intelligent steel strand and prestress structure member for building |
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Application publication date: 20111221 |