CN106441263A - Optical fiber loop framework capable of reducing polarization error of optical fiber gyroscope and method for winding optical fiber loop thereon - Google Patents
Optical fiber loop framework capable of reducing polarization error of optical fiber gyroscope and method for winding optical fiber loop thereon Download PDFInfo
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- CN106441263A CN106441263A CN201610786078.XA CN201610786078A CN106441263A CN 106441263 A CN106441263 A CN 106441263A CN 201610786078 A CN201610786078 A CN 201610786078A CN 106441263 A CN106441263 A CN 106441263A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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Abstract
The invention discloses an optical fiber loop framework capable of reducing a polarization error of an optical fiber gyroscope. The optical fiber loop framework comprises an insulated framework body, wherein a pair of positioning slots with opposite concave and convex directions is radially formed in the inner sides of the side walls of the framework body; the positioning slots are fan-shaped zones with the angles of (10 +/- 2) degrees; the depths of the positioning slots are equal to the diameter of an optical fiber; an optical fiber outlet slot is formed in one side wall of the framework body; the width of the optical fiber outlet slot is equal to the diameter of the optical fiber. A method for winding an optical fiber loop on the optical fiber loop framework comprises the following steps: 1) preparing the optical fiber with sufficient length, keeping a sufficient tail fiber, and marking two end points and a middle point of the optical fiber according to the length of the optical fiber; 2) preparing the optical fiber which can be wound into about two layers, and winding a bottom layer by an orthogonal winding method; 3) tightly adhering the optical fiber to the inner side of the right wall of the framework body, and winding the optical fiber by the orthogonal winding method till the respective end points; 4) fixing the tail fiber to the framework body; 5) performing post-curing treatment. The following beneficial effects are achieved: polarization cross coupling is effectively reduced, the polarization error is reduced, and the symmetry is better.
Description
Technical field
The present invention relates to optical fibre gyro with fiber optic loop field and in particular to a kind of optical fiber of reduction optical fibre gyro polarization error
Ring skeleton and its method for winding optical fiber ring.
Background technology
The polarization error suppression of optical fibre gyro is one of key technology during optical fibre gyro is developed.Initial optical fibre gyro is adopted
With single-mode fiber winding optical fiber coil, due to single-mode fiber fibre core ovality and bending, distortion, coiling when the stress that produces etc.
Produce linear birefrigence so that single mode fiber coil cannot keep inputting the linear polarization state of light wave, when returning to interference point, light
The polarization state of ripple does not know, and then causes the output signal of optical fibre gyro to decline, or even loses gyroscopic effect.For this reason, typically adopting
With full polarization fibre winding optical fiber gyro, to avoid signal fadeout, reduce polarization error.Even if it should be noted that using guarantor
Polarisation road, still suffers from polarization cross Coupling point in light path, the portion of energy of main ripple is coupled to orthogonal polarisation state, produces cross-couplings
Light wave.Because the refractive index of two orhtogonal linear polarizaitons is different, between the interference phase difference between cross-couplings light wave and main ripple
Interference phase difference is different, and meanwhile, cross-couplings light wave returns to may be with main wave interference during main wave polarization.Therefore, improve and protect partially
The coiling performance of optical fiber and fiber optic coils is the main method of suppression polarization error.In fiber optic loop coiling, commonly used at present
The symmetrical winding of quadrupole, although this winding method can improve fiber optic loop temperature transient characteristic to a certain extent, because this
Winding method has helical structure, and every layer of optical fiber has certain angle with fiber optic loop main shaft, and its angle direction phase of adjacent interlayer
Instead, destroy the symmetry of optical fiber loop.With the increase of the fiber optic loop number of plies, the stress that optical fiber is born is also bigger, causes
Polarization cross couples, and causes intensity type polarization error, the certainty of measurement of impact optical fibre gyro angle sensor.
Content of the invention
The technical problem to be solved in the present invention is, for existing fiber around above shortcomings processed, there is provided a kind of
Reduce the optical fiber ring skeleton of optical fibre gyro polarization error and its method for winding optical fiber ring, so that the optical fiber loop of coiling is had more
Good symmetry, reduces polarization error, reduces the impact to optical fiber loop temperature performance for the nonreciprocity simultaneously.
The present invention be employed technical scheme comprise that by solving above-mentioned technical problem：
A kind of optical fiber ring skeleton reducing optical fibre gyro polarization error, including the frame body of insulation, described frame body
Inside sidewalls be radially provided with a pair concavo-convex contrary locating slot, locating slot be 8 °～12 ° of angle sector region, locating slot
Depth identical with fibre diameter；The side wall of described frame body is provided with output groove, and the width of output groove is identical with fibre diameter.
By such scheme, described frame body is the metal material such as stainless steel or aluminium alloy, and frame body is around fine shaft portion
Carry out blasting treatment (ensureing the roughness on surface).
By such scheme, described frame body center is provided with pilot hole, and (pilot hole is used for fixing with miscellaneous part, convenient
The coiling of optical fiber loop and solidification).
Present invention also offers a kind of method using above-mentioned fiber optic loop skeleton coiling optical fiber loop, comprise the steps：
1) fiber lengths needed for calculating, prepare the optical fiber of sufficient length and stop tail optical fiber, according to fiber lengths on optical fiber
Make the mark at two end points and its midpoint, at three, mark is respectively right section of optical fiber terminal, left section of optical fiber terminal and left and right optical fiber
Symmetrical midpoint；
2) prepare optical fiber about needed for 2 layers of coiling, optical fiber starting point is fixed on the determining of inside sidewalls of fiber optic loop frame body
Position groove starting point, by orthogonal winding coiling prime coat, that is,：Ensure every circle optical fiber in 0 °～(10 ± 2) ° region (sector region) and bone
There is certain angle in frame body axis, remaining region is completely orthogonal with frame body axis, until the frame body leftmost side,
After one layer of bottom row's fibre terminates, fixed rapidly with solidification glue；
3) optical fiber is close to inside frame body right wall in the way of perpendicular to frame body axis, and makes a left side for optical fiber
The locating slot starting point of the inside sidewalls inwall of the symmetrical midpoint alignment frame body of right optical fiber, by orthogonal winding winding optical fiber, until
Right section of optical fiber and left section of optical fiber are respectively around to right section of optical fiber terminal and left section of optical fiber terminal；
4) tail optical fiber of right section of optical fiber and left section of optical fiber is drawn from output groove and is fixed in frame body；
5) by step 4) carry out cured later process around the optical fiber loop making.
By such scheme, described step 3) in, on the left of frame body along frame body axis to the right, by orthogonal
The detailed process of winding winding optical fiber is：
3.1) the locating slot starting point of the inside sidewalls of left and right optical fiber symmetrical midpoint alignment frame body of optical fiber, by left section of light
Fine in the way of perpendicular to frame body axis counterclockwise coiling ground floor it is ensured that every circle optical fiber 0 °～(10 ±
2) there is certain angle in ° region (sector region) and frame body axis, remaining region completely and frame body axis just
Hand over, until the solidification of the frame body leftmost side；
3.2) by right section of optical fiber in the way of perpendicular to frame body axis in the direction of the clock the coiling second layer it is ensured that
Every circle optical fiber is located in the optical fiber duct that ground floor adjacent fiber is formed, until on the left of frame body, apart from frame body side wall etc.
Place in half root fibre diameter length；
3.3) by right section of optical fiber in the way of perpendicular to frame body axis in the direction of the clock coiling third layer it is ensured that
Every circle optical fiber is located in the optical fiber duct that second layer adjacent fiber is formed, until the frame body rightmost side；
3.4) by left section of optical fiber counterclockwise along frame body side wall around to above third layer it is ensured that every circle optical fiber position
In the optical fiber duct that third layer adjacent fiber is formed, until on the right side of frame body, being equal to half root optical fiber apart from frame body side wall
The place of diameter length；
3.5) repeat the above steps 3.1) to 3.4), until coiling 4N layer optical fiber, and right section of optical fiber and left section of optical fiber divide
Not around to right section of optical fiber terminal and left section of optical fiber terminal；The many circles of the odd-level turn ratio even level number of turn of 4N layer optical fiber；Described N
It is the integer not less than 1.
By such scheme, described step 3) in, solidification glue all coated by every one layer of optical fiber of coiling, and solidification glue is used for optical fiber and light
Fixation between fibre, optical fiber and frame body.
Compared with prior art, beneficial effects of the present invention：
1st, frame body inside sidewalls be radially provided with a pair concavo-convex contrary angle be (10 ± 2) °, depth be that optical fiber is straight
The fan-shaped locating slot in footpath is it is ensured that there is certain angle in 0 °～(10 ± 2) ° sector region and frame body axis in every circle optical fiber
Degree, frame body axis is just being given completely in remaining region, realizes orthogonal winding, and the region that optical fiber intersects is just by original full circle
Decrease to about the 1/36 of every circle, effectively reduce polarization cross coupling, reduce polarization error；
2nd, fan-shaped locating slot is conducive to positioning in winding process for the optical fiber so that fiber optic loop Bian Za area is located at same level
On line, symmetry more preferably, reduces the impact to optical fiber loop temperature performance for the nonreciprocity.
Brief description
Fig. 1 is the structural representation of one embodiment of optical fiber loop framework of the present invention；
Fig. 2 is the structural representation in the orthogonal area of Fig. 1 optical fiber loop framework；
Fig. 3 is the side view of optical fiber loop framework；
Fig. 4 is the finished product sectional view of the optical fiber loop using Fig. 1 skeleton coiling；
Fig. 5 is orthogonal winding schematic diagram；
In figure：1- frame body, 2- side wall, 3- locating slot, 4- output groove, 5- pilot hole.
Specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail：
As shown in FIG. 1 to 3, the optical fiber ring skeleton of the reduction optical fibre gyro polarization error that the present invention provides, including insulation
Frame body 1, the side wall 2 of frame body 1 is radially inside provided with a pair concavo-convex contrary locating slot 3, and locating slot 3 is angle
10 ° of sector region, the depth of locating slot 3 is identical with fibre diameter；The left side side wall 2 of frame body 1 is provided with output groove 4, goes out
The width of fine groove 4 is identical with fibre diameter.
The coiling of optical fiber loop and solidification for convenience, is provided with pilot hole 5 in frame body 1 center, can be used for it
He fixes part.For making skeleton and optical fiber have good Temperature Matching performance, using optical fiber bottoming technique, by optical fiber loop and bone
Frame is kept apart.
The method of fiber optic loop skeleton coiling optical fiber loop of the present invention, comprises the steps：
1) fiber lengths needed for calculating, prepare the optical fiber of sufficient length and stop tail optical fiber, according to fiber lengths on optical fiber
Make the mark at two end points and its midpoint, at three, mark is respectively right section of optical fiber terminal, left section of optical fiber terminal and left and right optical fiber
Symmetrical midpoint；
2) prepare optical fiber about needed for 2 layers of coiling, optical fiber starting point is fixed on side wall 2 inner side of fiber optic loop frame body 1
Locating slot 3 starting point, by orthogonal winding coiling prime coat, that is,：Ensure every circle optical fiber in 0～10 ° of region (sector region) and skeleton
There is certain angle in body 1 axis, remaining region is substantially orthogonal to frame body 1 axis, until frame body 1 is the most left
Side, after one layer of bottom row's fibre terminates, is fixed rapidly with solidification glue；
3) optical fiber is close to inside frame body 1 right wall in the way of perpendicular to frame body 1 axis, and makes optical fiber
Locating slot 3 starting point of left and right optical fiber symmetrical midpoint alignment frame body 1 inwall, by orthogonal winding winding optical fiber, as shown in figure 5,
On the left of frame body 1 along frame body 1 axis to the right, the detailed process by orthogonal winding winding optical fiber is：3.1)
Locating slot 3 starting point of side wall 2 inner side of the left and right optical fiber symmetrical midpoint alignment frame body 1 of optical fiber, by left section of optical fiber with vertical
In frame body 1 axis mode counterclockwise coiling ground floor it is ensured that every 0～10 ° of region of circle optical fiber (fan section
Domain) there is certain angle with frame body 1 axis, remaining region is completely orthogonal with frame body 1 axis, until skeleton is originally
On the left of body 1；3.2) by right section of optical fiber in the way of perpendicular to frame body 1 axis the coiling second layer in the direction of the clock, protect
Demonstrate,prove every circle optical fiber to be located in the optical fiber duct that ground floor adjacent fiber is formed, until on the left of frame body 1, apart from frame body 1 side
Wall is equal to the place of half root fibre diameter length；3.3) by right section of optical fiber in the way of perpendicular to frame body 1 axis press suitable
Clockwise coiling third layer is it is ensured that every circle optical fiber is located in the optical fiber duct that second layer adjacent fiber is formed, until frame body 1
The rightmost side；3.4) by left section of optical fiber counterclockwise along frame body 1 side wall around to above third layer it is ensured that every circle optical fiber position
In the optical fiber duct that third layer adjacent fiber is formed, until on the right side of frame body 1, being equal to half root light apart from frame body 1 side wall
The place of fine diameter length；3.5) repeat the above steps 3.1) to 3.4), until coiling 4N layer optical fiber, and right section of optical fiber and a left side
Section optical fiber is respectively around to right section of optical fiber terminal and left section of optical fiber terminal；The odd-level turn ratio even level number of turn of 4N layer optical fiber many one
Circle；N is the integer not less than 1；In this step, according to routine operation, every one layer of optical fiber of coiling all coats solidification glue, solidification glue
For the fixation between optical fiber and optical fiber, optical fiber and skeleton；
4) tail optical fiber of right section of optical fiber and left section of optical fiber is drawn from output groove 4 and be fixed in frame body 1；
5) by step 4) carry out cured later process, finished product section such as Fig. 4 institute of optical fiber loop around the optical fiber loop making
Show.
The core of the present invention is the structure design of optical fiber loop framework so that adopting the optical fiber loop of orthogonal winding coiling
Reduce optical fiber intersection region, effectively reduce polarization error；In addition, fan-shaped locating slot is conducive to optical fiber determining in winding process
Position, so as to have more preferable symmetry, reduces the impact to optical fiber loop temperature performance for the nonreciprocity.
The present invention is not restricted to listed utilization in specification and embodiment.Those skilled in the art is come
Say, various corresponding changes and modification can be made according to the present invention, and all these corresponding change and modification broadly fall into this
Bright scope of the claims.
Claims (6)
1. a kind of optical fiber ring skeleton reducing optical fibre gyro polarization error, includes the frame body insulating it is characterised in that described
The inside sidewalls of frame body are radially provided with a pair concavo-convex contrary locating slot, and locating slot is the fan section of 8 °～12 ° of angle
Domain, the depth of locating slot is identical with fibre diameter；The side wall of described frame body is provided with output groove, the width of output groove and optical fiber
Diameter is identical.
2. the optical fiber ring skeleton reducing optical fibre gyro polarization error according to claim 1 is it is characterised in that described skeleton
Body is the metal material such as stainless steel or aluminium alloy, and frame body carries out blasting treatment around fine shaft portion.
3. the optical fiber ring skeleton reducing optical fibre gyro polarization error according to claim 1 is it is characterised in that described skeleton
It is provided with pilot hole at body central.
4. the method for the fiber optic loop skeleton coiling optical fiber loop described in a kind of any one of utilization the claims 1～3, its feature
It is, comprise the steps：
1) fiber lengths needed for calculating, prepare the optical fiber of sufficient length and stop tail optical fiber, make according to fiber lengths on optical fiber
Two end points and its mark at midpoint, at three, mark respectively right section of optical fiber terminal, left section of optical fiber terminal and left and right optical fiber are symmetrical
Midpoint；
2) prepare optical fiber about needed for 2 layers of coiling, optical fiber starting point is fixed on the locating slot of the inside sidewalls of fiber optic loop frame body
Starting point, by orthogonal winding coiling prime coat, that is,：Ensure that every circle optical fiber is deposited with frame body axis in 0 °～(10 ± 2) ° region
In certain angle, remaining region is completely orthogonal with frame body axis, until the frame body leftmost side, when one layer of bottom row is fine
After end, fixed rapidly with solidification glue；
3) optical fiber is close to inside frame body right wall in the way of perpendicular to frame body axis, and makes the left and right light of optical fiber
The locating slot starting point of the inside sidewalls inwall of fine symmetrical midpoint alignment frame body, by orthogonal winding winding optical fiber, until right section
Optical fiber and left section of optical fiber are respectively around to right section of optical fiber terminal and left section of optical fiber terminal；
4) tail optical fiber of right section of optical fiber and left section of optical fiber is drawn from output groove and is fixed in frame body；
5) by step 4) carry out cured later process around the optical fiber loop making.
5. the method for fiber optic loop skeleton coiling optical fiber loop according to claim 4 is it is characterised in that described step 3)
In, on the left of frame body along frame body axis to the right, the detailed process by orthogonal winding winding optical fiber is：
3.1) the locating slot starting point of the inside sidewalls of left and right optical fiber symmetrical midpoint alignment frame body of optical fiber, by left section of optical fiber with
Mode perpendicular to frame body axis counterclockwise coiling ground floor it is ensured that every circle optical fiber is in 0 °～(10 ± 2) ° area
There is certain angle in domain and frame body axis, remaining region is completely orthogonal with frame body axis, until frame body
The leftmost side solidifies；
3.2) by right section of optical fiber in the way of perpendicular to frame body axis in the direction of the clock the coiling second layer it is ensured that every circle
Optical fiber is located in the optical fiber duct that ground floor adjacent fiber is formed, until on the left of frame body, being equal to half apart from frame body side wall
The place of root fibre diameter length；
3.3) by right section of optical fiber in the way of perpendicular to frame body axis in the direction of the clock coiling third layer it is ensured that every circle
Optical fiber is located in the optical fiber duct that second layer adjacent fiber is formed, until the frame body rightmost side；
3.4) by left section of optical fiber counterclockwise along frame body side wall around to above third layer it is ensured that every circle optical fiber is located at the
In the optical fiber duct of three layers of adjacent fiber formation, until on the right side of frame body, being equal to half root fibre diameter apart from frame body side wall
The place of length；
3.5) repeat the above steps 3.1) to 3.4), until coiling 4N layer optical fiber, and right section of optical fiber and left section of optical fiber rotating around
To right section of optical fiber terminal and left section of optical fiber terminal；The many circles of the odd-level turn ratio even level number of turn of 4N layer optical fiber；Described N is not
Integer less than 1.
6. the method for fiber optic loop skeleton coiling optical fiber loop according to claim 4 is it is characterised in that described step 3)
In, solidification glue all coated by every one layer of optical fiber of coiling, and solidification glue is used for the fixation between optical fiber and optical fiber, optical fiber and frame body.
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| CN201610786078.XA CN106441263A (en) | 2016-08-31 | 2016-08-31 | Optical fiber loop framework capable of reducing polarization error of optical fiber gyroscope and method for winding optical fiber loop thereon |
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| CN201610786078.XA CN106441263A (en) | 2016-08-31 | 2016-08-31 | Optical fiber loop framework capable of reducing polarization error of optical fiber gyroscope and method for winding optical fiber loop thereon |
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Cited By (9)
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| CN107101650A (en) * | 2017-06-05 | 2017-08-29 | 北京菲波森思科技有限公司 | A kind of fiber optic loop preparation method |
| CN107152929A (en) * | 2017-07-20 | 2017-09-12 | 西安邮电大学 | It is a kind of to polarize the method that alternately optical fibre gyro removes error |
| CN109405849A (en) * | 2018-10-18 | 2019-03-01 | 武汉长盈通光电技术有限公司 | A kind of viscous ring method of fiber optic loop |
| CN109737947A (en) * | 2019-02-20 | 2019-05-10 | 哈尔滨工程大学 | A kind of four ring design optical fibre gyro fiber optic loop preparation methods |
| CN109974685A (en) * | 2019-04-12 | 2019-07-05 | 中航捷锐（北京）光电技术有限公司 | A kind of preparation method of environment sensitive ring |
| CN110160556A (en) * | 2019-05-17 | 2019-08-23 | 中北大学 | A kind of skeleton of optical fibre gyro sensitive line ring and the sub- winding of symmetrical chiasma |
| CN110926505A (en) * | 2019-12-25 | 2020-03-27 | 重庆华渝电气集团有限公司 | Optical fiber ring winding method for improving stress distribution symmetry of optical fiber ring |
| CN112504259A (en) * | 2020-12-18 | 2021-03-16 | 重庆华渝电气集团有限公司 | Optical fiber ring winding method with bidirectional temperature inhibition effect |
| CN112525183A (en) * | 2020-12-22 | 2021-03-19 | 重庆华渝电气集团有限公司 | Optical fiber ring winding method for improving stress and temperature performance of optical fiber gyroscope |
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| CN107101650A (en) * | 2017-06-05 | 2017-08-29 | 北京菲波森思科技有限公司 | A kind of fiber optic loop preparation method |
| CN107101650B (en) * | 2017-06-05 | 2020-06-16 | 北京菲波森思科技有限公司 | Method for manufacturing optical fiber ring |
| CN107152929A (en) * | 2017-07-20 | 2017-09-12 | 西安邮电大学 | It is a kind of to polarize the method that alternately optical fibre gyro removes error |
| CN109405849A (en) * | 2018-10-18 | 2019-03-01 | 武汉长盈通光电技术有限公司 | A kind of viscous ring method of fiber optic loop |
| CN109737947A (en) * | 2019-02-20 | 2019-05-10 | 哈尔滨工程大学 | A kind of four ring design optical fibre gyro fiber optic loop preparation methods |
| CN109974685A (en) * | 2019-04-12 | 2019-07-05 | 中航捷锐（北京）光电技术有限公司 | A kind of preparation method of environment sensitive ring |
| CN110160556B (en) * | 2019-05-17 | 2023-01-24 | 中北大学 | Framework and symmetrical cross winding method of fiber-optic gyroscope sensitive coil ring |
| CN110160556A (en) * | 2019-05-17 | 2019-08-23 | 中北大学 | A kind of skeleton of optical fibre gyro sensitive line ring and the sub- winding of symmetrical chiasma |
| CN110926505A (en) * | 2019-12-25 | 2020-03-27 | 重庆华渝电气集团有限公司 | Optical fiber ring winding method for improving stress distribution symmetry of optical fiber ring |
| CN110926505B (en) * | 2019-12-25 | 2023-02-21 | 重庆华渝电气集团有限公司 | Optical fiber ring winding method for improving stress distribution symmetry of optical fiber ring |
| CN112504259B (en) * | 2020-12-18 | 2022-07-01 | 重庆华渝电气集团有限公司 | Optical fiber ring winding method with bidirectional temperature inhibition effect |
| CN112504259A (en) * | 2020-12-18 | 2021-03-16 | 重庆华渝电气集团有限公司 | Optical fiber ring winding method with bidirectional temperature inhibition effect |
| CN112525183A (en) * | 2020-12-22 | 2021-03-19 | 重庆华渝电气集团有限公司 | Optical fiber ring winding method for improving stress and temperature performance of optical fiber gyroscope |
| CN112525183B (en) * | 2020-12-22 | 2022-07-01 | 重庆华渝电气集团有限公司 | Optical fiber ring winding method for improving stress and temperature performance of optical fiber gyroscope |
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