CN116046028B - Manufacturing method of optical fiber gyro ring - Google Patents
Manufacturing method of optical fiber gyro ring Download PDFInfo
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- CN116046028B CN116046028B CN202310336838.7A CN202310336838A CN116046028B CN 116046028 B CN116046028 B CN 116046028B CN 202310336838 A CN202310336838 A CN 202310336838A CN 116046028 B CN116046028 B CN 116046028B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 193
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 53
- 238000004804 winding Methods 0.000 claims abstract description 41
- 238000005520 cutting process Methods 0.000 claims abstract description 35
- 239000000835 fiber Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000003286 fusion draw glass process Methods 0.000 claims abstract description 6
- 238000005452 bending Methods 0.000 claims description 7
- 238000007380 fibre production Methods 0.000 claims description 3
- 238000012958 reprocessing Methods 0.000 claims description 3
- 241001347978 Major minor Species 0.000 claims 1
- 238000002360 preparation method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
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- 230000010287 polarization Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/4457—Bobbins; Reels
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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
- G01C19/72—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
- G01C19/721—Details
- G01C19/722—Details of the mechanical construction
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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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
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Abstract
The invention relates to the technical field of optical fiber gyroscopes, and provides a manufacturing method of an optical fiber gyro ring, which comprises the steps of determining the maximum curvature radius of an optical fiber for a fiber gyro ring according to the radius of the manufactured optical fiber gyro, obtaining an elliptic long half axis a of an elliptic optical fiber preform and an elliptic short half axis b of the elliptic optical fiber preform, determining the maximum eccentricity e of the optical fiber for the fiber gyro ring according to the production standard parameters of the optical fiber for the fiber gyro ring, determining a cutting part of the elliptic optical fiber preform by combining with the elliptic long half axis a, obtaining an elliptic runway-shaped preform, preparing the optical fiber for the fiber gyro ring by adopting a fusion drawing process, and manufacturing the optical fiber gyro ring by adopting a ring winding process.
Description
Technical Field
The invention relates to the technical field of fiber-optic gyroscopes, in particular to a manufacturing method of a fiber-optic gyroscope ring.
Background
The fiber optic gyroscope ring is a core sensitive device of the fiber optic gyroscope, and the winding technology of the fiber optic gyroscope ring directly influences the performance of the ring, in particular influences the temperature drift of the ring so as to influence the final precision of the gyroscope. The traditional optical fiber for the fiber-optic gyroscope winding circular ring is usually a polarization-maintaining optical fiber, has good stress birefringence and polarization-maintaining characteristics, and can bear the stress influence caused by torsion and uneven fiber-discharging tension in the winding process.
However, as the length of the optical fiber used for improving the accuracy of the gyroscope increases, the optical fiber cannot be continuously and orderly arranged in the loop winding process due to continuous torsion and fiber jumping which often occur in the loop winding process, and the phenomenon of 'bulging' or 'collapse' often occurs, so that great difficulty is brought to later winding, the precision of fiber arrangement is damaged, and the performance of the loop is deteriorated. The local stress and local distortion of the irregular arrangement in the process of expanding and contracting the ring by the thermal field can not be released for a long time, and the damage and even the influence on the reliability of the top can be caused. Therefore, the optical fiber needs to be improved aiming at the existing optical fiber, which is beneficial to the orderly arrangement of the optical fiber for the later-stage optical fiber gyro around the circular ring and avoids continuous twisting.
Disclosure of Invention
The present invention is directed to solving at least one of the technical problems existing in the related art. Therefore, the invention provides a manufacturing method of the optical fiber gyro ring, which realizes that the optical fiber for the optical fiber gyro ring is more beneficial to the orderly arrangement of the optical fiber at the later stage and avoids continuous twisting.
The invention provides a manufacturing method of a fiber optic gyroscope ring, which comprises the following steps:
step S1, determining the maximum radius of curvature of an optical fiber for the optical fiber gyro ring according to the radius for manufacturing the optical fiber gyro, and determining an elliptic long half axis a of an elliptic optical fiber preform for preparing the optical fiber gyro ring and an elliptic short half axis b of the elliptic optical fiber preform according to the maximum radius of curvature;
s2, determining the mould size of the optical fiber preform according to the elliptic long half axis a and the elliptic short half axis b, and producing and obtaining the elliptic optical fiber preform according to the mould size;
s3, determining the maximum eccentricity e of the optical fiber for the optical fiber gyro around the ring according to the optical fiber production standard parameters for the optical fiber gyro around the ring, determining the cutting part of the elliptical optical fiber preform according to the maximum eccentricity e and the elliptical long half axis a, and cutting the elliptical optical fiber preform to obtain an elliptical runway-shaped preform;
s4, preparing the optical fiber for the optical fiber gyro winding ring by adopting a fusion drawing process on the oval runway-shaped preformed rod;
and S5, manufacturing the optical fiber gyro ring by adopting a ring winding process to the optical fiber for the optical fiber gyro ring winding.
Further, in the step S3, a first equation for solving the maximum radius of curvature Rc of the optical fiber for the optical fiber gyro around the ring is constructed according to the production parameters of the optical fiber for the optical fiber gyro around the ring, and determining the maximum radius of curvature Rc according to the production parameters of the fiber-optic gyroscope, and substituting the maximum radius of curvature Rc into the maximum eccentricity e of the fiber-optic gyroscope for winding the ring according to the first party Cheng Qiude.
Further, the first equation is:
wherein ,
indicate wavelength, & lt + & gt>
Represents the cut-off wavelength, e represents the maximum eccentricity,/->
Indicating a high stress birefringence.
Further, the maximum radius of curvature Rc is calculated by formula (1):
wherein R represents the radius of the fiber-optic gyroscope.
Further, in the step S3, a second equation for solving the maximum eccentricity e is constructed according to the maximum eccentricity e and the elliptic long half axis a, and the maximum eccentricity e and the elliptic long half axis a are substituted into the second equation to solve the height of the straight line portion of the elliptic runway-shaped preform
And +/based on the height of the ellipse major half axis a and the straight line portion>
And determining the linear distance L of the cutting part, and determining the cutting part according to the linear distance L of the cutting part.
Further, the second equation is
。
Further, in the step S3, a straight line distance L of the cut-out portion is calculated according to formula (2):
further, the cutting part comprises a first cutting part and a second cutting part, a coordinate system is built by taking the intersection point of the elliptic long half axis and the elliptic short half axis as a coordinate origin, coordinates of two end points of a first cutting straight line position of the first cutting part are set to be A1 (-L/2, a/2), A2 (L/2, a/2), and coordinates of two end points of a second cutting straight line position of the second cutting part are set to be A3 (-L/2, -a/2), A4 (L/2, -a/2).
Further, in the step S4, the method further includes obtaining a post-melt-drawing eccentricity e0 of the oval racetrack-shaped preform in real time during the preparation of the optical fiber for the optical fiber gyro around the ring, determining whether the current production state of the optical fiber for the optical fiber gyro around the ring is qualified according to a difference Δe between the post-melt-drawing eccentricity e0 and the maximum eccentricity e, and setting Δe=e0-e;
if delta e is not equal to 0, determining that the current production state of the optical fiber for the optical fiber gyro to be wound around the ring is unqualified,
when delta e is smaller than 0, the diameter of the bending part of the optical fiber for the optical fiber gyro ring winding is longer, and the shape of the optical fiber for the optical fiber gyro ring winding needs to be adjusted;
when delta e is more than 0, the diameter of the bending part is short, and continuous observation or reprocessing of the optical fiber for the optical fiber gyro around the circular ring is determined according to the comparison result of the difference delta e and the difference standard value range;
and if Δe=0, determining that the current production state of the optical fiber for the optical fiber gyro winding the circular ring is qualified.
The above technical solutions in the embodiments of the present invention have at least one of the following technical effects:
according to the manufacturing method of the optical fiber gyro ring, in the manufacturing process of the optical fiber gyro ring, the curvature radius of the optical fiber for the optical fiber gyro ring is controlled to be in the minimum range through the precise control of the curvature radius, so that the number of outwards expanding winding layers of the optical fiber for the optical fiber gyro ring in the process of winding the optical fiber ring is improved, and the detection sensitivity of the optical fiber gyro is improved.
Further, in the preparation process of the optical fiber gyro ring, the maximum eccentricity of the optical fiber for the optical fiber gyro ring is determined according to the optical fiber production standard parameters for the optical fiber gyro ring, the cutting part of the oval optical fiber preform is determined according to the maximum eccentricity and the oval long half axis, and the oval optical fiber preform is cut to obtain the oval runway-shaped preform, so that the reasonability of the die size of the oval runway-shaped preform is ensured.
Further, in the preparation process of the oval runway-shaped prefabricated rod, a first equation for solving the maximum curvature radius of the optical fiber for the optical fiber gyroscope to wind around the annular ring is constructed according to the production parameters of the optical fiber for the optical fiber gyroscope to wind around the annular ring, the maximum curvature radius is determined according to the production parameters of the optical fiber gyroscope, and the maximum curvature radius is substituted into the maximum eccentricity of the optical fiber for the optical fiber gyroscope to wind around the annular ring of the first party Cheng Qiude, so that the calculation accuracy of the maximum eccentricity of the optical fiber for the optical fiber gyroscope to wind around the annular ring is ensured.
Further, in the preparation process of the oval runway-shaped preform, a second equation for solving the maximum eccentricity is constructed according to the maximum eccentricity and the oval long half axis, the maximum eccentricity and the oval long half axis are substituted into the second equation to solve the height of the straight line part of the oval runway-shaped preform, the straight line distance of the cutting part of the oval runway-shaped preform is determined according to the heights of the oval long half axis and the straight line part, and the cutting part is determined according to the straight line distance of the cutting part, so that the accurate control of the cutting part cutting position of the oval optical fiber preform is ensured.
Further, in the preparation process of the oval runway-shaped preform, a coordinate system is built by taking the intersection point of the oval long half axis and the oval short half axis as the origin of coordinates, and two end point coordinates of the first cutting straight line position of the first cutting part and two end point coordinates of the second cutting straight line position of the second cutting part are set, so that the precise control of the cutting part cutting position of the oval optical fiber preform is further ensured.
Further, in the preparation process of the optical fiber for the optical fiber gyro winding ring by adopting the fusion drawing process, the eccentricity of the optical fiber for the optical fiber gyro winding ring after fusion drawing is obtained in real time in the preparation process of the optical fiber for the optical fiber gyro winding ring, whether the current production state of the optical fiber for the optical fiber gyro winding ring is qualified or not is determined according to the difference value of the eccentricity and the maximum eccentricity, the production quality in the preparation process of the optical fiber for the optical fiber gyro winding ring is ensured, the curvature radius of the optical fiber for the optical fiber gyro winding ring is controlled to be in the minimum range, the arrangement uniformity of the optical fiber for the optical fiber gyro winding ring in the process of winding ring is improved, the probability of continuous twisting is reduced, and finally the aim of improving the detection sensitivity of the optical fiber gyro is realized.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of steps of a method for manufacturing a fiber optic gyroscope ring according to the present invention.
FIG. 2 is a schematic view of a coordinate system of a fiber optic gyroscope ring according to the present invention when determining a cut-out.
FIG. 3 is a schematic view of an oval racetrack preform in a method of manufacturing a fiber optic gyroscope collar according to the present invention.
Fig. 4 is a schematic view of a structure of an optical fiber for a fiber-optic gyroscope winding ring in the method for manufacturing a fiber-optic gyroscope ring according to the present invention.
Reference numerals:
1-an elliptical optical fiber preform, 2-a first cut-out portion, 3-a first cut-out straight line position; the optical fiber for the ring winding of the 6-fiber-optic gyroscope comprises a 4-second cut-out straight line position, a 5-second cut-out part, a 7-bending part, an 8-straight line part, a 9-stress region, a 10-cladding region and an 11-reference plane.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The following examples are illustrative of the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
In embodiments of the invention, unless specified and limited otherwise, a first feature "up" or "down" on a second feature may be a direct contact of the first and second features, or an indirect contact of the first and second features via an intermediary. Moreover, a first feature being "above," "over" and "above" a second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher level of horizontal straight portions than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature has a horizontal straight portion of lesser height than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Referring to fig. 1 to 4, fig. 1 is a schematic step flow diagram of a method for manufacturing a fiber-optic gyroscope ring according to an embodiment of the present invention, fig. 2 is a schematic coordinate system diagram of a cut-out portion determined in the method for manufacturing a fiber-optic gyroscope ring according to an embodiment of the present invention, fig. 3 is a schematic structural diagram of an oval racetrack-shaped preform in the method for manufacturing a fiber-optic gyroscope ring according to an embodiment of the present invention, and fig. 4 is a schematic structural diagram of an optical fiber for winding a fiber-optic gyroscope around a torus in the method for manufacturing a fiber-optic gyroscope ring according to an embodiment of the present invention.
The invention provides a manufacturing method of a fiber optic gyroscope ring, which comprises the following steps:
step S1, determining the maximum radius of curvature of an optical fiber 6 for the optical fiber gyro ring according to the radius for manufacturing the optical fiber gyro, and determining an elliptic long half axis a of an elliptic optical fiber preform 1 and an elliptic short half axis b of the elliptic optical fiber preform 1 for preparing the optical fiber gyro ring-winding optical fiber 6 according to the maximum radius of curvature;
step S2, determining the mould size of the optical fiber preform according to the elliptic long half axis a and the elliptic short half axis b, and producing and obtaining an elliptic optical fiber preform 1 according to the mould size;
step S3, determining the maximum eccentricity e of the optical fiber 6 for the optical fiber gyro to wind the circular ring according to the production standard parameters of the optical fiber 6 for the optical fiber gyro to wind the circular ring, determining the cutting part of the elliptical optical fiber preform 1 according to the maximum eccentricity e and the elliptical long half axis a, and cutting the elliptical optical fiber preform 1 to obtain an elliptical runway-shaped preform;
s4, preparing an optical fiber 6 for winding the optical fiber gyroscope around the circular ring by adopting a fusion drawing process on the oval runway-shaped prefabricated rod;
and S5, manufacturing the optical fiber gyro ring by adopting a ring winding process to wind the optical fiber 6 for the ring around the optical fiber gyro.
Specifically, the optical fiber 6 for optical fiber gyro ring includes a stress region 9 of the optical fiber 6 for optical fiber gyro ring, a cladding region 10 of the optical fiber 6 for optical fiber gyro ring, and a reference surface 11 of the optical fiber 6 for optical fiber gyro ring.
Specifically, the determination of the relevant parameters in step S1 is well known to those skilled in the art, and will not be described in detail in this specification.
Specifically, in step S3, a first equation for solving the maximum radius of curvature Rc of the optical fiber 6 for the optical fiber gyro around the ring is constructed based on the production parameters of the optical fiber 6 for the optical fiber gyro around the ring, the maximum radius of curvature Rc is determined based on the production parameters of the optical fiber gyro, and the maximum eccentricity e of the optical fiber 6 for the optical fiber gyro around the ring is obtained by substituting the maximum radius of curvature Rc into the first equation.
Specifically, the first equation is:
wherein ,
indicate wavelength, & lt + & gt>
Represents the cut-off wavelength, e represents the maximum eccentricity,/->
Indicating a high stress birefringence.
Specifically, in the prior art, when the polarization maintaining fiber wavelength is used for the fiber-optic gyroscope
At 1300-1550 nm, when->
=1550nm，/>
Take the typical value of high stress birefringence of fiber =1300 nm +.>
0.78%.
Specifically, the maximum radius of curvature Rc is calculated by the formula (1):
wherein R represents the radius of the fiber-optic gyroscope.
Specifically, the smaller the critical radius of curvature is, the better the smaller the critical radius of curvature is, so that on one hand, the smaller the radius can be wound, on the other hand, the miniaturization of the gyroscope is facilitated, the smaller the winding radius can be outwards expanded to wind for more layers, so that when the same outer diameter is facilitated, the longer optical fiber 6 for the optical fiber gyroscope to wind the circular ring can be wound under the condition of smaller inner diameter, and the detection sensitivity of the gyroscope is also facilitated to be improved.
Specifically, the radius of the miniature gyroscope is generally larger than 15mm, the critical curvature radius of the optical fiber 6 for the optical fiber gyroscope to be designed around the circular ring is required to be smaller than 7.5mm, the critical curvature radius is substituted into the formula (1) to solve the inequality so as to obtain e not smaller than 0.7739mm, and at the moment, a person skilled in the art can determine the lower limit of the value of e according to the current production technology limit.
Specifically, in step S3, a second equation for solving the maximum eccentricity e is constructed based on the maximum eccentricity e and the elliptic long half axis a, and the maximum eccentricity e and the elliptic long half axis a are substituted into the second equation to solve the height of the straight line portion 8 of the elliptic racetrack preform
And according to the ellipse major half axis a and the height of the straight line part 8 +.>
And determining the linear distance L of the cutting part, and determining the cutting part according to the linear distance L of the cutting part.
Specifically, the second equation is
。
Specifically, in step S3, the straight line distance L of the cut-out portion is calculated according to formula (2):
specifically, the cut-out portion includes a first cut-out portion 2 and a second cut-out portion 5, a coordinate system is constructed with the intersection of the elliptical major half axis and the elliptical minor half axis as the origin of coordinates, coordinates of both ends of a first cut-out straight line position 3 of the first cut-out portion 2 are set to be A1 (-L/2, a/2), coordinates of both ends of a second cut-out straight line position 4 of the second cut-out portion 5 are set to be A3 (-L/2, -a/2), and coordinates of both ends of a second cut-out straight line position 4 of the second cut-out portion 5 are set to be A4 (L/2, -a/2).
Specifically, in step S4, the method further includes obtaining, in real time, a post-melt-drawing eccentricity e0 of the oval racetrack preform during the preparation of the optical fiber 6 for winding the optical fiber gyro, determining whether the current production state of the optical fiber 6 for winding the optical fiber gyro is acceptable according to a difference Δe between the post-melt-drawing eccentricity e0 and the maximum eccentricity e, and setting Δe=e0-e;
if deltae is not equal to 0, determining that the current production state of the optical fiber 6 for the optical fiber gyro to be wound around the circular ring is unqualified,
when Δe is smaller than 0, the diameter of the bending portion 7 of the optical fiber 6 for the optical fiber gyro ring is too long, and the shape of the optical fiber 6 for the optical fiber gyro ring needs to be adjusted;
when delta e is more than 0, the diameter of the bending part 7 is shorter, and continuous observation or reprocessing of the optical fiber 6 for the optical fiber gyro ring is determined according to the comparison result of the difference delta e and the difference standard value range;
if Δe=0, the current production state of the optical fiber 6 for the optical fiber gyro ring is determined to be qualified.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A method of manufacturing a fiber optic gyroscope ring, comprising the steps of:
step S1, determining the maximum radius of curvature of an optical fiber for the optical fiber gyro ring according to the radius for manufacturing the optical fiber gyro, and determining an elliptic long half axis a of an elliptic optical fiber preform for preparing the optical fiber gyro ring and an elliptic short half axis b of the elliptic optical fiber preform according to the maximum radius of curvature;
s2, determining the mould size of the optical fiber preform according to the elliptic long half axis a and the elliptic short half axis b, and producing and obtaining the elliptic optical fiber preform according to the mould size;
s3, determining the maximum eccentricity e of the optical fiber for the optical fiber gyro around the ring according to the optical fiber production standard parameters for the optical fiber gyro around the ring, determining the cutting part of the elliptical optical fiber preform according to the maximum eccentricity e and the elliptical long half axis a, and cutting the elliptical optical fiber preform to obtain an elliptical runway-shaped preform;
s4, preparing the optical fiber for the optical fiber gyro winding ring by adopting a fusion drawing process on the oval runway-shaped preformed rod;
s5, manufacturing a fiber-optic gyroscope ring by adopting a ring winding process for the fiber-optic gyroscope ring winding optical fiber;
in the step S3, a first equation for solving the maximum curvature radius Rc of the optical fiber for the optical fiber gyro around the ring is constructed according to the production parameters of the optical fiber for the optical fiber gyro around the ring, and determining the maximum radius of curvature Rc according to the production parameters of the fiber optic gyroscope, and substituting the maximum radius of curvature Rc into the maximum eccentricity e of the fiber optic gyroscope for winding the ring of the fiber optic gyroscope by the first party Cheng Qiude, wherein the first equation is as follows:
wherein ,
indicate wavelength, & lt + & gt>
Represents the cut-off wavelength, e represents the maximum eccentricity,/->
Indicating a high stress birefringence.
2. The method of manufacturing a fiber-optic gyroscope ring according to claim 1, wherein the maximum radius of curvature Rc is calculated by equation (1):
wherein R represents the radius of the fiber-optic gyroscope.
3. The method of manufacturing a fiber-optic gyroscope ring according to claim 2, wherein in the step S3, a second equation for solving the maximum eccentricity e is constructed based on the maximum eccentricity e and the elliptic long half axis a, and the height of the straight line portion of the elliptic racetrack preform is solved by substituting the maximum eccentricity e and the elliptic long half axis a into the second equation
And +/based on the height of the ellipse major half axis a and the straight line portion>
And determining the linear distance L of the cutting part, and determining the cutting part according to the linear distance L of the cutting part.
4. The method of manufacturing a fiber optic gyroscope ring according to claim 3, wherein the second equation is
。
5. The method of manufacturing a fiber-optic gyroscope ring according to claim 4, wherein in step S3, a linear distance L of the cutout is calculated according to formula (2):
6. the method of manufacturing a loop of a fiber optic gyroscope according to claim 5, wherein the cut-out includes a first cut-out and a second cut-out, a coordinate system is constructed using an intersection of the elliptical major-minor axis and the elliptical minor-minor axis as an origin of coordinates, coordinates of both ends of a first cut-out straight line position of the first cut-out are set to A1 (-L/2, a/2), A2 (L/2, a/2), and coordinates of both ends of a second cut-out straight line position of the second cut-out are set to A3 (-L/2, -a/2), A4 (L/2, -a/2).
7. The method of manufacturing a loop of a fiber optic gyroscope according to claim 6, wherein the step S4 further comprises obtaining a post-melt-drawing eccentricity e0 of the oval racetrack preform in real time during the process of manufacturing the fiber optic gyroscope-around-loop optical fiber, determining whether the current production state of the fiber optic gyroscope-around-loop optical fiber is acceptable according to a difference Δe between the post-melt-drawing eccentricity e0 and the maximum eccentricity e, and setting Δe=e0-e;
if delta e is not equal to 0, determining that the current production state of the optical fiber for the optical fiber gyro winding the circular ring is unqualified;
when delta e is smaller than 0, the diameter of the bending part of the optical fiber for the optical fiber gyro ring winding is longer, and the shape of the optical fiber for the optical fiber gyro ring winding needs to be adjusted;
when delta e is more than 0, the diameter of the bending part is short, and continuous observation or reprocessing of the optical fiber for the optical fiber gyro around the circular ring is determined according to the comparison result of the difference delta e and the difference standard value range;
and if Δe=0, determining that the current production state of the optical fiber for the optical fiber gyro winding the circular ring is qualified.
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