CN204988310U - Fiber bragg grating sensor ware tied in a bundle - Google Patents
Fiber bragg grating sensor ware tied in a bundle Download PDFInfo
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- CN204988310U CN204988310U CN201520679688.0U CN201520679688U CN204988310U CN 204988310 U CN204988310 U CN 204988310U CN 201520679688 U CN201520679688 U CN 201520679688U CN 204988310 U CN204988310 U CN 204988310U
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Abstract
The utility model provides a fiber bragg grating sensor ware tied in a bundle, it includes the multifiber, all be carved with a plurality of gratings on every optic fibre of, in the many optic fibre that is carved with a plurality of gratings encapsulation in one planes tied in a bundle or the beam tube. The utility model discloses fiber bragg grating sensor ware tied in a bundle's advantage is: the butt fusion loss is little, and operation process is simple, and it is high to survey resolution ratio, easy encapsulation, and the survival rate is high, and is small, and can realize line, face, the body of large tracts of land temperature strain and survey.
Description
Technical field:
The utility model relates to sensor technical field, and be specifically that a kind of splice loss, splice attenuation is little, operating process is simple, detection resolution is high, easily encapsulates, and survival rate is high, volume is little, and can realize the bundling optical fiber grating sensor of the line of large area temperature strain, face, body detection.
Background technology:
Fiber grating (FBG) is one of fiber optic passive device with the fastest developing speed in recent years.Since the K.O.Hill etc. of Canadian CRC Communications Research Center in 1978 has produced in the world since first Fiber Bragg Grating FBG (FBG), due to the advantage of its many uniqueness, people are more and more devoted to the sensing being applied to various physical quantity.1989, people's reported first fiber gratings such as W.W.Morey made sensor and are used for measuring tempeature and strain, have from then on raised the new page of fiber grating in field of sensing technologies applied research.Fiber-optic grating sensor can only carry out relative measurement and to operating environment requirements high deficiency by having a strong impact on of luminous energy fluctuation with optical fiber interference type sensor-based system because the Wavelength-encoding characteristic of fiber grating avoids intensity modulation type Fibre Optical Sensor precision, and reusability, make it be widely used in the military-civil fields such as Aero-Space, petrochemical complex, electric power, weaving, carry out the measurement of temperature, strain, displacement, pressure etc.As sensing element, tested convert information is the movement of its reflection wavelength, i.e. Wavelength demodulation by fiber grating, is not therefore subject to the impact of optical power fluctuation and system loss.In addition, fiber grating also has good reliability, electromagnetism interference, anticorrosive, is easy to be connected on by multiple fiber grating on an optical fiber form optical fiber optical grating array, realizes the advantages such as distributed sensing.Fiber-optical grating temperature sensor have highly sensitive, fast response time, electromagnetism interference, little without drift, volume, be easy to install, the feature such as reliability is high, long service life.Temperature, strain be the most basic and the most frequently used in the field such as oil, Aero-Space are also very important detected parameters, and probe temperature, strain are main and the most directly one of the application of fiber-optic grating sensor.
The research of fiber-optic grating sensor, except existing device is carried out outfield checking, improve and improve except, there is following developments at present: the measuring technique greatly developing measuring tempeature distribution, namely by measuring of a single point, multiple spot distribution is gone up to Fibre Optical Sensor along the line, and the measurement of large area multiple dimensional distribution; Exploitation comprises the multi-functional sensor of measuring tempeature strain; Development larger sensor arrays, realizes full optical detection and remote monitoring.
In heavy construction, will often adopt multiple spot continuous temperature measurement, quasi-distributed multiple optical fiber Bragg grating sensors can solve these engineering problems well.The bunchiness of the single fiber grating welding of normal employing at present, or use fiber grating string to carry out the line detection of temperature, strain, the operating process of these two kinds of modes is very loaded down with trivial details, need to encapsulate separately each grating, again grating is carried out series welding one by one, complicated operation, splice loss, splice attenuation is large, not easily encapsulate, survival rate is low.In addition, because grating welding needs certain length, the distance namely between two gratings can not be too short, and therefore the resolution of temperature sensing is lower.
Utility model content:
The technical problems to be solved in the utility model is, provide a kind of splice loss, splice attenuation little, operating process is simple, detection resolution is high, easily encapsulates, and survival rate is high, volume is little, and can realize the bundling optical fiber grating sensor of the line of large area temperature strain, face, body detection.
Technical solution of the present utility model is, a kind of bundling optical fiber grating sensor with following structure is provided, it comprises multifiber, and every root optical fiber is all carved with multiple grating, and many are carved with in optical fiber boundling encapsulation in one plane or one beam tube of multiple grating.
After adopting above structure, the beneficial effects of the utility model are:
1, series welding is needed each grating to carry out one by one from prior art different, the utility model directly on optical fiber, scribes multiple grating, and the optical fiber many being carved with multiple grating carries out boundling encapsulation, without the need to carrying out series welding, therefore the utility model not only splice loss, splice attenuation greatly reduce, and operating process also becomes comparatively simple.
2, because the utility model is the direct multiple grating of imprinting on an optical fiber, what the spacing between grating can be arranged is very little, and therefore to have dense degree high for the utility model, and detection spacing is little, and detection resolution is high, and is easy to integrated feature.
3, because integrated level of the present utility model is higher, can encapsulate by whole optical crosstalk grid, then by every optical crosstalk grid boundling together, decrease the annexes such as connector, therefore the utility model not only small volume, and only need install one when using, easily encapsulate.
4, because fiber grating unit is less, easy for installation, fiber grating infringement is less, so fiber grating survival rate is high.
5, because multiple grating carved by an optical fiber in the utility model, therefore can multiple spot on detection line, and when multiple raster unit side-by-side planar or curved surface are placed, some test on the face that can realize n × m, and when each plane having laid fiber grating, the solid test of object just can be realized.
Bundling optical fiber grating sensor described in the utility model; wherein; what many optical fiber boundling encapsulation of being carved with multiple grating in one plane adopted can be following concrete structure: multifiber horizontal parallel distributes; interval is had between optical fiber; multifiber is positioned at a square protective sleeve, has bundling optical fiber to protect filling material between optical fiber and square protective sleeve inwall.
Bundling optical fiber grating sensor described in the utility model; wherein; it can be following concrete structure that many optical fiber boundlings being carved with multiple grating are encapsulated in what adopt in a beam tube: the many optical fiber being carved with multiple grating are stuck in the trapezoidal groove of a bracing frame, and bracing frame is enclosed with internal protective cover, band and outer jointing jacket from inside to outside successively.The effect of band is that protection fiber grating is not deviate from from groove.
Bundling optical fiber grating sensor described in the utility model; wherein; it can be following concrete structure that many optical fiber boundlings being carved with multiple grating are encapsulated in what adopt in a beam tube: the many optical fiber being carved with multiple grating concentrate on the centre of internal protective cover; internal protective cover external peripheral surface is circumferentially distributed with many and strengthens rope; strengthen for many rope is enclosed with outer jointing jacket, between optical fiber, be filled with boundling glue.Reinforcement rope can be sensing unit provides mechanical more protection, as born certain stretching and compressive resistance etc.It is fixing that boundling glue plays buffering.
Bundling optical fiber grating sensor described in the utility model; wherein; it can be following concrete structure that many optical fiber boundlings being carved with multiple grating are encapsulated in what adopt in a beam tube: the many optical fiber being carved with multiple grating are positioned at a circular protective sleeve; multifiber circumferentially distributes, and has bundling optical fiber to protect filling material between optical fiber and circular protective sleeve inside.
Bundling optical fiber grating sensor described in the utility model, wherein, bundling optical fiber protection filling material can be made up of high-temperature fibre or thixotropic colloid.The bundling optical fiber protection filling material be made up of high-temperature fibre or thixotropic colloid can prevent moisture moisture from entering optical fiber affects its physical strength and optical property.
Accompanying drawing illustrates:
Fig. 1 is many structural representations when putting together with being carved with the optical fiber parallel interval of multiple grating;
Schematic cross-section when Fig. 2 is the utility model bundling optical fiber grating sensor employing plane packaging structure;
Schematic cross-section when Fig. 3 is the utility model bundling optical fiber grating sensor employing brace type boundling encapsulating structure;
Schematic cross-section when Fig. 4 is the utility model bundling optical fiber grating sensor employing center type boundling encapsulating structure;
Fig. 5 is the schematic cross-section of the utility model bundling optical fiber grating sensor when adopting conventional boundling encapsulating structure;
Fig. 6 is the principle of work schematic diagram of the utility model bundling optical fiber grating sensor when being applied in fiber Bragg grating sensor system.
Specific embodiment:
Below in conjunction with the drawings and specific embodiments, the utility model bundling optical fiber grating sensor is described in further detail:
Embodiment one
As depicted in figs. 1 and 2, the utility model bundling optical fiber grating sensor comprises 12 optical fiber 1, every root optical fiber 1 is all carved with ten gratings 2, what 12 optical fiber 1 being carved with ten gratings 2 adopted is plane boundling packaged type, its concrete structure is: 12 optical fiber 1 horizontal parallel distributions, have interval between adjacent fiber 1, the optical sensing center distance being carved with the optical fiber 1 of multiple grating 2 is greater than 0.5mm.In addition, the spacing between the grating 2 on same optical fiber 1 is more than or equal to 2mm, and 12 optical fiber 1 are positioned at a square protective sleeve 7 simultaneously, have bundling optical fiber to protect filling material 6 between optical fiber 1 and square protective sleeve 7 inwall.Bundling optical fiber protection filling material 6 is made up of high-temperature fibre or thixotropic colloid.Square protective sleeve is generally made up of the metals such as pottery, aluminium and thermoplastic polymer, as the materials such as tygon, Polyvinylchloride, polyurethane and Teflon are made.
Embodiment two
As shown in Figure 3; the utility model bundling optical fiber grating sensor comprises six roots of sensation optical fiber 1; every root optical fiber 1 is all carved with multiple grating 2; what the six roots of sensation was carved with optical fiber 1 employing of multiple grating 2 is beam tube boundling packaged type; its concrete structure is: the optical fiber 1 that the six roots of sensation is carved with multiple grating 2 is stuck in the trapezoidal groove 9 of a bracing frame 8, and bracing frame 8 is enclosed with internal protective cover 10, band 11 and outer jointing jacket 12 from inside to outside successively.Have interval between adjacent fiber 1, the optical sensing center distance being carved with the optical fiber 1 of multiple grating 2 is greater than 0.5mm.In addition, the spacing between the grating 2 on same optical fiber 1 is more than or equal to 2mm.Band 11 can be made up the nonmetal or metal such as aluminium strip, steel band of ester plastic etc., inner sheath 10 can be made up of organic materials such as PE, oversheath 12 can be made up of organic material, as adopted PE, PVC and TPU etc., also can be the material close with test surfaces material property, can also stainless steel and other metal materials be used.
Embodiment three
As shown in Figure 4; the utility model bundling optical fiber grating sensor comprises seven optical fiber 1; every root optical fiber 1 is all carved with multiple grating 2; what many optical fiber 1 being carved with multiple grating 2 adopted is beam tube boundling packaged type; its concrete structure is: seven optical fiber 1 being carved with multiple grating 2 concentrate on the centre of internal protective cover 10; have interval between adjacent fiber 1, the optical sensing center distance being carved with the optical fiber 1 of multiple grating 2 is greater than 0.5mm.In addition, the spacing between the grating 2 on same optical fiber 1 is more than or equal to 2mm.Internal protective cover 10 external peripheral surface is circumferentially distributed with 12 to strengthen 13,12, rope reinforcement rope 13 is enclosed with outer jointing jacket 12, be filled with boundling glue 15 between optical fiber 1.Strengthening rope 10 can adopt tinsel also can make with non-metallic fibers.Oversheath 12 can be made up of organic material, as adopted PE, PVC and TPU etc., also can be the material close with test surfaces material property, can also use stainless steel and other metal materials.
Embodiment four
As shown in Figure 5; the utility model bundling optical fiber grating sensor comprises eight optical fiber 1; every root optical fiber 1 is all carved with multiple grating 2; what eight optical fiber 1 being carved with multiple grating 2 adopted is beam tube boundling packaged type; its concrete structure is: eight optical fiber 1 being carved with multiple grating 2 are positioned at a circular protective sleeve 14; eight optical fiber 1 circumferentially distribute, and have interval between adjacent fiber 1, and the optical sensing center distance being carved with the optical fiber 1 of multiple grating 2 is greater than 0.5mm.In addition, the spacing between the grating 2 on same optical fiber 1 is more than or equal to 2mm.Bundling optical fiber is had to protect filling material 6 between optical fiber 1 and circular protective sleeve 14 inside.
As shown in Figure 6, fiber Bragg grating sensor system generally includes wideband light source 3, photoswitch 4, fiber Bragg grating (FBG) demodulator 5, optical fiber 1 and optical fiber grating sensing unit, band light source 3 is connected by optical fiber 1 with between photoswitch 4, be connected by optical fiber grating sensing unit between photoswitch 4 with fiber Bragg grating (FBG) demodulator 5, when the utility model bundling optical fiber grating sensor is applied in fiber Bragg grating sensor system, the many optical fiber 1 being carved with multiple grating 2 just use as optical fiber grating sensing unit.
Above-described embodiment is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various improvement that those of ordinary skill in the art make the technical solution of the utility model, all should fall in protection domain that the utility model claims determine.
Claims (6)
1. a bundling optical fiber grating sensor, it is characterized in that: it comprises multifiber (1), every root optical fiber (1) is all carved with multiple grating (2), and many are carved with in optical fiber (1) boundling encapsulation in one plane or one beam tube of multiple grating (2).
2. bundling optical fiber grating sensor according to claim 1; it is characterized in that: many optical fiber (1) boundling encapsulation of being carved with multiple grating (2) in one plane refer to; multifiber (1) horizontal parallel distributes; optical fiber has interval between (1); multifiber (1) is positioned at a square protective sleeve (7), has bundling optical fiber to protect filling material (6) between optical fiber (1) and square protective sleeve (7) inwall.
3. bundling optical fiber grating sensor according to claim 1; it is characterized in that: many optical fiber (1) boundlings being carved with multiple grating (2) are encapsulated in a beam tube and refer to; the many optical fiber (1) being carved with multiple grating (2) are stuck in the trapezoidal groove (9) of a bracing frame (8), bracing frame (8) are enclosed with from inside to outside successively internal protective cover (10), band (11) and outer jointing jacket (12).
4. bundling optical fiber grating sensor according to claim 1; it is characterized in that: many optical fiber (1) boundlings being carved with multiple grating (2) are encapsulated in a beam tube and refer to; the many optical fiber (1) being carved with multiple grating (2) concentrate on the centre of internal protective cover (10); internal protective cover (10) external peripheral surface is circumferentially distributed with many and strengthens rope (13); strengthen for many rope (13) is enclosed with outer jointing jacket (12), between optical fiber (1), be filled with boundling glue (15).
5. bundling optical fiber grating sensor according to claim 1; it is characterized in that: many optical fiber (1) boundlings being carved with multiple grating (2) are encapsulated in a beam tube and refer to; the many optical fiber (1) being carved with multiple grating (2) are positioned at a circular protective sleeve (14); multifiber (1) circumferentially distributes, and has bundling optical fiber to protect filling material (6) between optical fiber (1) and circular protective sleeve (14) inside.
6. the bundling optical fiber grating sensor according to claim 2 or 5, is characterized in that: described bundling optical fiber protection filling material (6) is made up of high-temperature fibre or thixotropic colloid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520679688.0U CN204988310U (en) | 2015-09-02 | 2015-09-02 | Fiber bragg grating sensor ware tied in a bundle |
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| CN201520679688.0U CN204988310U (en) | 2015-09-02 | 2015-09-02 | Fiber bragg grating sensor ware tied in a bundle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091920A (en) * | 2015-09-02 | 2015-11-25 | 中国电子科技集团公司第八研究所 | Clustered fiber Bragg grating sensor |
| CN110646115A (en) * | 2019-09-16 | 2020-01-03 | 江苏卓然智能重工有限公司 | FBG temperature monitoring device for prestress extension of quenching heat exchanger |
-
2015
- 2015-09-02 CN CN201520679688.0U patent/CN204988310U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091920A (en) * | 2015-09-02 | 2015-11-25 | 中国电子科技集团公司第八研究所 | Clustered fiber Bragg grating sensor |
| CN110646115A (en) * | 2019-09-16 | 2020-01-03 | 江苏卓然智能重工有限公司 | FBG temperature monitoring device for prestress extension of quenching heat exchanger |
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