CN101393308B - Low birefringent optical fiber winding and fixing device for optical fibre current sensor - Google Patents
Low birefringent optical fiber winding and fixing device for optical fibre current sensor Download PDFInfo
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- CN101393308B CN101393308B CN2008102264672A CN200810226467A CN101393308B CN 101393308 B CN101393308 B CN 101393308B CN 2008102264672 A CN2008102264672 A CN 2008102264672A CN 200810226467 A CN200810226467 A CN 200810226467A CN 101393308 B CN101393308 B CN 101393308B
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- 238000004804 winding Methods 0.000 title claims abstract description 24
- 239000013307 optical fiber Substances 0.000 title abstract description 24
- 239000000835 fiber Substances 0.000 claims abstract description 74
- 230000000295 complement effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims 1
- 229910052906 cristobalite Inorganic materials 0.000 claims 1
- 239000012858 resilient material Substances 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 229910052682 stishovite Inorganic materials 0.000 claims 1
- 229910052905 tridymite Inorganic materials 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 12
- 238000004806 packaging method and process Methods 0.000 abstract 2
- 230000006355 external stress Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 2
- 206010007247 Carbuncle Diseases 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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Abstract
The invention discloses an optical fiber winding and fixing device, which is suitable for fixing low birefringent fibers in the filed of all-fiber Sagnac optical interferometer mode optical fiber current sensing. The optical fiber winding and fixing device realizes the functions of the low birefringent fibers by means of separation of fixing and packaging and through annular spiral winding; the optical fibers are protected by grooves and supports from being influenced by external stress; and packaging of a shell shields the pollution of the outside world and guarantees the measuring precision and the reliability.
Description
Technical field
The present invention relates to a kind of low birefringent fiber technology that is fastened, be applicable to the fibre optic current sensor field of full optical fiber Sagnac optical interdferometer pattern.
Background technology
With the research of optical method for measuring electric current, had to surpass the research history in 30 years.Main type has: (1) block glass mould: comprise ring concentrator formula and closed type; (2) photoelectricity mixed type: comprise active type and passive; (3) full fiber type.Wherein tool development prospect is full optical fiber Sagnac optical interdferometer pattern, its principle and structure are mainly taken from famous military-civil aerospace navigation with fibre optic gyroscope (IFOG), have the relatively more easy advantage of high reliability, long-life, low cost and structural refinement, technology.The principle of full optical fiber Sagnac optical interdferometer mode current sensor measurement electric current is: according to Faraday magnetooptical effect, and the phase differential in the full-optical fiber optical interferometer that application low birefringent fiber (sensor fibre) measurement magnetic field that tested electric current generates causes between two light beams.
Fixing of the current sensor sensor fibre of existing full optical fiber Sagnac optical interdferometer pattern, the whole pouring mode of many employings is fixed, is encapsulated, this mode cost height, and can't dismantle and keep in repair after the one-shot forming, cause the later stage not safeguard to optical fiber, can only integral replacing when going wrong, cause significant wastage.
Summary of the invention
Fibre optic current sensor based on Sagnac optical interdferometer pattern comprises field optical fibers sensing head part and pulpit electronics, light device part, adopt the sensor fibre of low birefringent fiber as on-the-spot sensing head, this low birefringent fiber is wound in stable toroidal helical, external during operation stress sensitive.At the whole fixed form of watering of the current sensor sensor fibre of above-mentioned existing full optical fiber Sagnac optical interdferometer pattern, the objective of the invention is to invent a kind of low birefringent fiber winding and fixing device simple in structure, make its have simple in structure, dependable performance, simple installation, cost low, detachable, characteristics such as can safeguard.
This is invented specifically by the following technical solutions:
A kind of winding and fixing device that is used for the fibre optic current sensor low birefringent fiber, described device comprise shell 2, structure of fiber_optic 5, two supports 3, end cap 6; It is characterized by:
Described shell 2 comprises the interior annulus housing of a hollow and the outer toroid housing of a hollow, and described interior annulus housing places in the described outer toroid housing, passes on left the shell 2 that thin-walled has been connected to form this device;
Described structure of fiber_optic 5 is an annular, is provided with spiral groove 10 along rack surface, and groove 10 cross sections are slightly larger than low birefringent fiber 4 cross sections;
Described support 3 is the array of fins structure that supports with circular skeleton, in order to fixing described structure of fiber_optic 5;
Described end cap 6 is the annular thin plate, and the interior annulus housing of the internal diameter of end cap 6 and described shell 2 is complementary, and the outer toroid housing of the external diameter of end cap 6 and described shell 2 is complementary, in order to seal described shell 2;
Described low birefringent fiber 4 is fastened in described groove 10, and close button fixed fiber support 5 from the both sides of described structure of fiber_optic 5 by two supports 3, structure of fiber_optic 5 is packed between the interior annulus housing and outer toroid housing of described shell 2, end cap 6 cans 2 are passed through on right side at described shell 2, form a winding and fixing device with fibre optic current sensor low birefringent fiber of hollow endoporus, described endoporus is used to hold carrying object to be measured 1.
The present invention has taken into full account the fixedly requirement of current sense optical fiber, has abandoned the defective of existing whole pouring encapsulation, adopt optical fiber fixing with encapsulate the mode of separating, have dependable performance, simple installation, cost low, detachable, characteristics such as can safeguard.
Description of drawings
Fig. 1 is based on the synoptic diagram of the fibre optic current sensor of Sagnac optical interdferometer pattern;
Fig. 2 is the decomposing schematic representation of low birefringent fiber winding and fixing device;
Fig. 3 is the sectional view of low birefringent fiber winding and fixing device;
Fig. 4 is the detailed view of low birefringent fiber winding and fixing device;
Fig. 5 is the synoptic diagram of support 3;
Fig. 6 is the synoptic diagram of structure of fiber_optic 5.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described further.
Fig. 1 has shown the basic comprising based on the fibre optic current sensor of Sagnac optical interdferometer pattern, comprise field optical fibers sensing head part and pulpit electronics, light device two parts, adopt the sensor fibre of low birefringent fiber as on-the-spot sensing head, this low birefringent fiber is wound in stable toroidal helical, external during operation stress sensitive, according to Faraday magnetooptical effect, the phase differential in the full-optical fiber optical interferometer that application low birefringent fiber (sensor fibre) measurement magnetic field that tested electric current generates causes between two light beams is measured electric current.The present invention only relates to the winding and fixing device of low birefringent fiber in the field optical fibers sensing head part.
Low birefringent fiber winding and fixing device disclosed by the invention comprises shell 2, structure of fiber_optic 5, two supports 3, end cap 6; Described shell 2 comprises the interior annulus housing of a hollow and the outer toroid housing of a hollow, and described interior annulus housing places and passes on left the shell 2 that thin-walled has been connected to form this device in the described outer toroid housing.Structure of fiber_optic 5 is an annular, is provided with spiral groove 10 along rack surface, and groove 10 cross sections are slightly larger than low birefringent fiber 4 cross sections.Support 3 is the array of fins structure that supports with circular skeleton, in order to fixing described structure of fiber_optic 5.End cap 6 also is the annular of hollow, and the interior annulus housing of the internal diameter of end cap 6 and described shell 2 is complementary, and the outer toroid housing of the external diameter of end cap 6 and described shell 2 is complementary, in order to seal described shell 2.
Described low birefringent fiber 4 is fastened in described groove 10, and close button fixed fiber support 5 from the both sides of described structure of fiber_optic 5 by two supports 3, structure of fiber_optic 5 is packed between the interior annulus housing and outer toroid housing of described shell 2, two end cap 6 cans 2 are passed through in both sides at described shell 2, form a winding and fixing device with fibre optic current sensor low birefringent fiber of hollow endoporus, described endoporus is used to hold carrying object to be measured 1.
Being illustrated in figure 2 as the decomposing schematic representation of low birefringent fiber winding and fixing device, from left to right is respectively carrying object 1, shell 2, support 3, low birefringent fiber 4, structure of fiber_optic 5, end cap 6.Low birefringent fiber 4 is wound on the structure of fiber_optic 5, and two supports 3 close button structure of fiber_optic 5, in the shell 2 of packing into afterwards, seal up end cap 6, carrying object 1 are penetrated in the endoporus of shell 2.Carrying object 1 passes shell 2 endoporus, and the electric current in the carrying object 1 produces magnetic field, and this magnetic field can cause the phase differential of the light signal in the low birefringent fiber, can measure the electric current that passes through in the carrying object by this phase differential.
Fig. 3 has shown the stationary state of low birefringent fiber, Fig. 4 is the detailed view of low birefringent fiber winding and fixing device, carrying object 1 penetrates in the endoporus of shell 2, and 2 supports 3 close button structure of fiber_optic 5 and pack in the hollow cylindrical space that shell 2 and end cap 6 be sealed to.
Be illustrated in figure 5 as the synoptic diagram of support 3, support 3 is made up of fin 7, skeleton 8, pillar 9, fin 7 is cooked uniform array along circular skeleton 8 and is arranged, has the pillar 9 that is symmetrical in skeleton 8 in the middle of the adjacent fins 7, pillar 9 is a little less than fin 7 outermost, fin 7 both sides have the semicircle of symmetry, and this semicircle diameter is identical with the diameter of section of structure of fiber_optic 5.In the present embodiment, fin 7 is than pillar 9 high 1～2mm, support 3 profile symmetries, close that the semicircle about the elasticity fin just can maintain structure of fiber_optic 3 after the button, and the outward flange that closes button back fin 7 contacts with shell 2 and end cap 6, and while pillar 9 is lower than fin, has played the effect of restriction site.Structure of fiber_optic 5 is the ring-type quartz ring, and there is spiral groove 10 on the surface, is furnished with staggered blind hole 11 between side grooves.The internal diameter of described blind hole 11 is greater than the external diameter of described pillar 9, the degree of depth of described blind hole 11 is greater than the length of described pillar 9, two supports 3 are closed button fixed fiber support 5 from the both sides of described structure of fiber_optic 5, simultaneously, two semicircles of two side stands, 3 corresponding fins 7 close up with fixed fiber support 5, be that structure of fiber_optic 5 has blind hole 11 at the spiral grooves back side, support 3 has pillar 9, and two stands 3 closes button by the pillar 9 and the blind hole of structure of fiber_optic 5.
Be illustrated in figure 6 as the synoptic diagram of structure of fiber_optic 5, described structure of fiber_optic 5 is an annular, and material behavior and optical fiber are approaching, with SiO
2For good, outside surface has spiral grooves 10, trench cross section is than the slightly larger in diameter of low birefringent fiber, described structure of fiber_optic has blind hole 11 at the spiral grooves back side, the pillar 9 of moulding firmly of blind hole 11 depth ratio supports 3 is grown, the diameter of blind hole 11 is more bigger than pillar 9, and staggered blind hole 11 has guaranteed that the fin 7 of support 3 also is staggered simultaneously cooperate installation with pillar 9 after.
Low birefringent fiber 4 is put into the groove 10 of structure of fiber_optic 5 and can be protected optical fiber not to be subjected to the effect of external carbuncle; the winding of toroidal helical shape has guaranteed that the function of optical fiber meets the requirements; two supports 3 close button by the pillar 9 and the blind hole 11 of structure of fiber_optic 5; the position that the elasticity fin 7 of support and the Elastic Contact of structure of fiber_optic 5 have limited low birefringent fibers 4 in the groove 10; protected structure of fiber_optic 5; simultaneously; 7 whiles and shell 2 inwalls of elasticity fin of structure of fiber_optic 5 both sides; end cap 6 Elastic Contact; guarantee that fiber turns integral position opposite shell has the minute movement amount; both can resist the influence of external shock; do not influence measuring accuracy again; the intrusion that can prevent outside contamination is installed in the sealing of end cap 6, has guaranteed reliability of products.
Claims (6)
1. winding and fixing device that is used for the fibre optic current sensor low birefringent fiber, described device comprises shell (2), structure of fiber_optic (5), two supports (3), end cap (6); It is characterized by:
Described shell (2) comprises the interior annulus housing of a hollow and the outer toroid housing of a hollow, and described interior annulus housing places in the described outer toroid housing, passes on left the shell (2) that thin-walled has been connected to form this device;
Described structure of fiber_optic (5) is an annular, is provided with spiral groove (10) along rack surface, and groove (10) cross section is slightly larger than low birefringent fiber (4) cross section;
Described support (3) is the array of fins structure that supports with circular skeleton, in order to fixing described structure of fiber_optic (5);
Described end cap (6) is the annular thin plate, and the interior annulus housing of the internal diameter of end cap (6) and described shell (2) is complementary, and the outer toroid housing of the external diameter of end cap (6) and described shell (2) is complementary, in order to seal described shell (2);
Described low birefringent fiber (4) is fastened in described groove (10), and by two supports (3) close from the both sides of described structure of fiber_optic (5) button fixed fiber support (5), structure of fiber_optic (5) is packed between the interior annulus housing and outer toroid housing of described shell (2), end cap (6) can (2) is passed through on right side at described shell (2), form a winding and fixing device with fibre optic current sensor low birefringent fiber of hollow endoporus, described endoporus is used to hold carrying object to be measured (1).
2. the winding and fixing device that is used for the fibre optic current sensor low birefringent fiber according to claim 1, it is characterized in that: described support (3) is by elasticity fin (7), mould skeleton (8) and mould pillar (9) firmly and form firmly, described fin (7) is cooked uniform array along circular skeleton (8) and is arranged, has the pillar (9) that is symmetrical in skeleton (8) in the middle of the adjacent fins (7), pillar (9) is a little less than fin (7) outermost, fin (7) both sides have the semicircle of symmetry, and this semicircle diameter is identical with the diameter of section of structure of fiber_optic (5).
3. the winding and fixing device that is used for the fibre optic current sensor low birefringent fiber according to claim 2, it is characterized in that: have staggered blind hole (11) between the spiral groove (10) of described structure of fiber_optic (5) both sides, the internal diameter of described blind hole (11) is greater than the external diameter of described pillar (9), the degree of depth of described blind hole (11) is greater than the length of described pillar (9), two supports (3) are closed button fixed fiber support (5) from the both sides of described structure of fiber_optic (5), simultaneously, two semicircles of the corresponding fins of two side stands (3) (7) close up with fixed fiber support (5), be that structure of fiber_optic (5) has blind hole (11) at the spiral grooves back side, support (3) has pillar (9), and two stands (3) closes button by the pillar (9) and the blind hole (11) of structure of fiber_optic (5).
4. the winding and fixing device that is used for the fibre optic current sensor low birefringent fiber according to claim 3, it is characterized in that: described fin (7) is a resilient material, the position that the Elastic Contact of itself and structure of fiber_optic (5) has limited the interior low birefringent fiber of groove (10) (4), elasticity fin (7) while and described shell (2) inwall, end cap (6) Elastic Contact of described structure of fiber_optic (5) both sides guarantee that fiber turns integral position opposite shell has the minute movement amount.
5. the winding and fixing device that is used for the fibre optic current sensor low birefringent fiber according to claim 1 is characterized in that: the material behavior of described structure of fiber_optic (5) is close with the material behavior of low birefringent fiber.
6. the winding and fixing device that is used for the fibre optic current sensor low birefringent fiber according to claim 5 is characterized in that: described structure of fiber_optic (5) material is SiO2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102264672A CN101393308B (en) | 2008-11-12 | 2008-11-12 | Low birefringent optical fiber winding and fixing device for optical fibre current sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102264672A CN101393308B (en) | 2008-11-12 | 2008-11-12 | Low birefringent optical fiber winding and fixing device for optical fibre current sensor |
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| CN101393308A CN101393308A (en) | 2009-03-25 |
| CN101393308B true CN101393308B (en) | 2010-12-08 |
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| JP5461260B2 (en) | 2010-03-19 | 2014-04-02 | 株式会社日立製作所 | Insulated spacer with built-in optical fiber |
| CN106918357A (en) * | 2015-12-27 | 2017-07-04 | 天津市鑫源泓达科技有限公司 | A kind of sensor fastening device |
| CN111721975A (en) * | 2020-08-03 | 2020-09-29 | 北京世维通光智能科技有限公司 | Optical fiber current sensor measuring instrument case |
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