CN114739377A - Optical fiber ring winding method of triaxial optical fiber gyroscope and triaxial optical fiber gyroscope - Google Patents
Optical fiber ring winding method of triaxial optical fiber gyroscope and triaxial optical fiber gyroscope Download PDFInfo
- Publication number
- CN114739377A CN114739377A CN202210365855.9A CN202210365855A CN114739377A CN 114739377 A CN114739377 A CN 114739377A CN 202210365855 A CN202210365855 A CN 202210365855A CN 114739377 A CN114739377 A CN 114739377A
- Authority
- CN
- China
- Prior art keywords
- fiber
- ring
- axis
- optical fiber
- triaxial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
- G01C19/726—Phase nulling gyrometers, i.e. compensating the Sagnac phase shift in a closed loop system
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Gyroscopes (AREA)
Abstract
The invention provides a fiber ring winding method of a triaxial fiber-optic gyroscope and the triaxial fiber-optic gyroscope, wherein the fiber-optic ring of the fiber-optic gyroscope is subjected to a bias test, and the frequency difference required to be kept by each optical path is selected according to the actual test result, so that the accuracy of a wrong frequency design is improved; on the basis of the original triaxial integrated fiber optic gyroscope, the light path frequency error design of the triaxial fiber optic gyroscope can be realized only by changing the number of the pad fiber optic layers corresponding to the two axial fiber optic rings in the process of winding the fiber optic rings, so that the problem of same frequency interference of the triaxial fiber optic rings is effectively solved, the structural change of the original fiber optic gyroscope is small, and the implementation and the improvement of the precision of the fiber optic gyroscope are facilitated; according to the size ranges of the optical fiber rings and the structural member, the total length of the optical fibers of the three optical fiber rings of the triaxial optical fiber gyroscope is accurately controlled, the design of optical path frequency error of the triaxial optical fiber gyroscope is realized, the problem of same frequency interference of the gyroscope is solved, the precision of the gyroscope is improved, and the reliability of an output result of the optical fiber gyroscope is ensured.
Description
Technical Field
The invention relates to the technical field of fiber optic gyroscopes, in particular to a fiber ring winding method of a triaxial fiber optic gyroscope and the triaxial fiber optic gyroscope.
Background
The fiber-optic gyroscope is an instrument capable of accurately determining the azimuth of a moving object, is essentially an angular rate sensor based on the Sagnac effect, and is an inertial navigation instrument widely used in modern aviation, navigation, aerospace and national defense industries. The optical fiber gyroscope is a sensitive element based on an optical fiber coil, light emitted by a laser diode is transmitted along an optical fiber in two directions, and the angular displacement of the sensitive element is determined by the change of a light transmission path; because of its low cost, high reliability and strong shock and vibration resistance, its application prospect is receiving great attention and has become one of the mainstream sensors.
When the frequency of each axis in the existing triaxial fiber-optic gyroscope is relatively close, the problem of same frequency interference generally exists, the problem of same frequency interference can cause the gyroscope to oscillate at zero offset, the precision of the gyroscope becomes poor, and the problem is particularly obvious in a triaxial integrated fiber-optic gyroscope with compact layout and very high integration level, the defect causes influence on the reliability of information acquired by the fiber-optic gyroscope, and the technical means for solving the same frequency interference in the triaxial fiber-optic gyroscope is lacked at present.
Disclosure of Invention
The invention provides a fiber ring winding method of a triaxial fiber-optic gyroscope and the triaxial fiber-optic gyroscope, which are used for solving the problem of gyroscope zero-bias test curve oscillation caused by co-frequency interference of a triaxial fiber-optic gyroscope multi-axis fiber ring in the prior art and further ensuring the precision of the fiber-optic gyroscope.
The invention provides a fiber ring winding method of a triaxial fiber-optic gyroscope, which comprises the following steps:
s1, carrying out zero offset test on the optical fiber ring of each axis in the triaxial optical fiber gyro on a plurality of different pulling offset frequencies, and judging whether the triaxial optical fiber gyro has oscillation phenomenon;
s2, if there is no oscillation phenomenon in the triaxial fiber optic gyroscope, acquiring a first frequency difference of the Y-axis fiber optic ring relative to the X-axis fiber optic ring, and further acquiring a second frequency difference of the Y-axis fiber optic ring relative to the Z-axis fiber optic ring;
s3, calculating the total length of the optical fiber to be wound by the Y-axis optical fiber ring and the Z-axis optical fiber ring respectively based on the first frequency difference and the second frequency difference;
s4, acquiring the number of winding layers of a Y-axis fiber ring and a Z-axis fiber ring, and respectively determining the number of layers of the Y-axis fiber ring and the Z-axis fiber ring which need to be padded with fibers based on the total length of optical fibers needing to be wound by the Y-axis fiber ring and the Z-axis fiber ring;
s5 respectively performing fiber padding on the Y-axis fiber ring and the Z-axis fiber ring according to the number of layers of the Y-axis fiber ring and the Z-axis fiber ring which are determined in the step S4 and need to be padded.
Wherein, step S1 specifically includes:
s101, using the characteristic frequency of the X-axis fiber ring as a reference, obtaining the frequency difference between the Y-axis fiber ring phase and the X-axis fiber ring and the frequency difference between the Y-axis fiber ring and the Z-axis fiber ring
S102, carrying out zero-offset test on the optical fiber ring assembly of each axis in the triaxial optical fiber gyroscope, judging whether the triaxial optical fiber gyroscope has oscillation phenomenon, if so, adjusting the frequency difference and carrying out zero-offset test again until the triaxial optical fiber gyroscope has no oscillation phenomenon.
Further, in step S3, the required winding length l of the Y-axis fiber ring is calculatedyThe length of the winding ring is required to be l for the Z-axis optical fiber ringzApplies the formula:
wherein，f1Is the characteristic frequency of the X-axis fiber ring, c is the speed of light, n is the refractive index of the fiber on the fiber ring, lbdIs the sum of the lengths of the pigtails at the output end of the Y waveguide, Δ f1For said first frequency difference, Δ f2Is the second frequency difference; Δ f1≥0.5kHz、Δf2≥0.5kHz。
Specifically, in step S4, determining the number of layers of the Y-axis fiber ring and the Z-axis fiber ring that need to be padded with fibers, and applying a formula:
wherein R is1For the diameter of the looped fiber, the error is Δ R1≤1μm；
R2Is the ring body width of the optical fiber ring, (n)3+0.5)·R1≤R2≤n3·R1，n3The number of turns of the first layer is wound;
R3is the ring skeleton inner diameter, R, of the optical fiber ring3Greater than the minimum bend radius of the looped optical fiber;
R4the outer diameter of the optical fiber is the outer diameter of the ring-wound optical fiber, namely the outer diameter of the optical fiber coating layer;
N1the number of winding layers of the Y-axis optical fiber ring, N2The number of the winding layers of the Z-axis optical fiber ring is set;
wherein n is1Number of layers of spacer fiber of Y-axis fiber ring, n2Number of fiber layers of the Z-axis fiber ring, n1And n2And (4) calculating the number of the obtained pad fiber layers, and rounding and adding one.
Preferably, the optical fiber of the pad fiber is consistent with the type of the optical fiber, the diameter of the optical fiber and the coating material of the surrounding optical fiber of the optical fiber ring in step S4.
Preferably, the optical fiber of the pad fiber in step S4 is a single mode optical fiber, the cladding diameter of which is 60 μm, and the coating diameterR4100 μm, diameter error Δ R4≤1μm。
The invention also provides a triaxial fiber optic gyroscope, which comprises an X-axis fiber ring, a Y-axis fiber ring and a Z-axis fiber ring, wherein the number of layers of the cushion fibers of the Y-axis fiber ring and the Z-axis fiber ring is obtained according to any one of the winding methods, and the Y-axis fiber ring and the Z-axis fiber ring are further wound.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
(1) according to the invention, the light path frequency-staggered design of the triaxial fiber optic gyroscope can be realized only by changing the number of layers of the priming fibers (namely, the padding fibers) corresponding to the two axial fiber optic rings in the process of winding the fiber optic rings on the basis of the original triaxial integrated fiber optic gyroscope, so that the triaxial same-frequency interference problem is solved, the original scheme is slightly changed, and the implementation is facilitated;
(2) when the frequency offset design is carried out, a pulling bias test can be carried out on the frequency of each axis of the triaxial fiber-optic gyroscope in a mode of carrying out the frequency offset test by equipment, and the frequency difference required to be kept by each optical path is selected according to the actual test result, so that the accuracy of the frequency offset design is improved;
(3) the prime optical fiber for the optical fiber ring cushion fiber adopts the single-mode optical fiber which has the same coating material and the same diameter as the winding optical fiber, has low cost and is consistent with the thermal stress change of the winding optical fiber, and can protect the inner-layer optical fiber and slow down the influence of external thermal effect;
(4) when carrying out the setting of fiber ring coiling parameter, to around environmental protection polarisation fine diameter error, fiber ring width design error, fiber ring internal diameter requirement etc. are controlled, and the coiling number of turns that can every layer of effectual control fiber ring for fiber ring has better coiling quality and the long control of more accurate fiber ring, makes the mistake frequency more accurate.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is one of the flow diagrams of a method for winding a fiber ring of a triaxial fiber-optic gyroscope according to the present invention;
FIG. 2 is a schematic diagram of a test effect of a triaxial fiber-optic gyroscope according to the present invention;
fig. 3 is a second schematic diagram illustrating the testing effect of the triaxial fiber-optic gyroscope according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," and the like in the description and claims of this application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The embodiment of the invention provides a fiber ring winding method of a triaxial fiber-optic gyroscope, which specifically comprises the following steps of:
s1, carrying out zero offset test on the optical fiber ring of each axis in the triaxial optical fiber gyro on a plurality of different pulling offset frequencies, and judging whether the triaxial optical fiber gyro has oscillation phenomenon;
s2, if there is no oscillation phenomenon in the triaxial fiber optic gyroscope, acquiring a first frequency difference of the Y-axis fiber optic ring relative to the X-axis fiber optic ring, and further acquiring a second frequency difference of the Y-axis fiber optic ring relative to the Z-axis fiber optic ring;
s3, calculating the total length of the optical fiber to be wound by the Y-axis optical fiber ring and the Z-axis optical fiber ring respectively based on the first frequency difference and the second frequency difference;
s4, acquiring the number of winding layers of a Y-axis fiber ring and a Z-axis fiber ring, and respectively determining the number of layers of the Y-axis fiber ring and the Z-axis fiber ring which need to be padded with fibers based on the total length of optical fibers needing to be wound by the Y-axis fiber ring and the Z-axis fiber ring;
s5 respectively performing fiber padding on the Y-axis fiber ring and the Z-axis fiber ring according to the number of layers, which are determined in the step S4, of the Y-axis fiber ring and the Z-axis fiber ring and need to be padded with fibers.
It should be noted that, where the X-axis fiber ring, the Y-axis fiber ring, and the Z-axis fiber ring are three groups of fiber rings in a triaxial fiber optic gyroscope, the mutual position relationship and the mutual angle between the three are clear, where the X, Y, Z axis is merely a name for description and should not be regarded as a specific ordering of objects, it is understood that the "X, Y, Z axis" may be interchanged with a specific order or sequence, where permitted; it should be understood that the objects identified as "X, Y, Z axes" are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those described or illustrated herein;
wherein, step S1 specifically includes:
s101, by taking the characteristic frequency of the X-axis optical fiber ring as a reference, acquiring the frequency difference of the Y-axis optical fiber ring relative to the X-axis optical fiber ring and the frequency difference of the Y-axis optical fiber ring and the Z-axis optical fiber ring;
s102, carrying out zero-offset test on the optical fiber ring assembly of each axis in the triaxial optical fiber gyroscope, judging whether the triaxial optical fiber gyroscope has oscillation phenomenon, if so, adjusting the frequency difference and carrying out zero-offset test again until the triaxial optical fiber gyroscope has no oscillation phenomenon;
specifically, a reference axis for adjusting the optical fiber ring frequency difference is determined, the characteristic frequencies of the Y axis and the Z axis are adjusted with the characteristic frequency of the X-axis optical fiber unchanged, the initial frequency difference of the Y axis relative to the X axis is obtained, and the initial frequency difference of the Y axis relative to the Z axis is obtained;
performing a frequency-offset and polarization-pulling test on the triaxial fiber optic gyroscope with crosstalk, determining whether oscillation phenomena exist among different axial fibers, and determining whether zero-offset precision of different axial fiber loops meets requirements; for the optical fiber gyroscope which does not meet the precision requirement, adjusting the frequency difference of the Y axis relative to the X axis and the frequency difference of the Y axis relative to the Z axis according to the test result, and performing the frequency-offset pulling-bias test again;
if the precision of the fiber-optic gyroscope obtained by the secondary test is still lower than the set threshold value, continuously adjusting the frequency difference of the Y axis relative to the X axis and the frequency difference of the Y axis relative to the Z axis, and repeatedly executing the test;
if the precision of the fiber-optic gyroscope obtained by the secondary test meets the set precision threshold requirement, the obtained frequency difference is taken as the first frequency difference and the second frequency difference and used for subsequent calculation; the frequency range of the optical fiber ring needing to be staggered is selected according to the actual test condition, so that the accuracy of frequency difference is improved;
it should be noted that the X, Y, Z axis is a relative descriptive term used herein only as an example of the embodiment of the present invention, and does not affect the implementation of the method of the present invention whether the characteristic frequency of the X-axis fiber ring is used as a reference or the characteristic frequency of the Y-axis or Z-axis fiber ring is used as a reference.
In step S3, calculating the length l of the Y-axis fiber ring to be woundyThe length of the winding ring needed by the Z-axis optical fiber ring is lzApplies the formula:
wherein f is1The characteristic frequency of the X-axis fiber ring, c the speed of light,n is the refractive index of the optical fiber on the optical fiber ring, lbdIs the sum of the lengths of the pigtails at the output end of the Y waveguide, Δ f1For said first frequency difference, Δ f2Is the second frequency difference; Δ f1≥0.5kHz、Δf2≥0.5kHz；
Further, in step S4, the Y-axis fiber ring obtained according to the above method needs to be wound for a ring length lyThe length of the winding ring is required to be l for the Z-axis optical fiber ringzCalculating and determining the number of layers of the Y-axis fiber ring and the Z-axis fiber ring which need to be padded with fibers, and applying a formula:
wherein R is1For the diameter of the looped fiber, the error is Δ R1≤1μm；
R2Is the width of the ring body of the optical fiber ring, namely the height of the optical fiber ring in the axial direction, (n)3+0.5)· R1≤R2≤n3·R1，n3The number of turns of the first layer is wound;
R3is the ring skeleton inner diameter, R, of the optical fiber ring3Greater than the minimum bend radius of the looped optical fiber;
R4the outer diameter of the optical fiber is the outer diameter of the ring-wound optical fiber, namely the outer diameter of the optical fiber coating layer;
N1the number of winding layers of the Y-axis optical fiber ring, N2The number of the winding layers of the Z-axis optical fiber ring is set;
wherein n is1Number of layers of spacer fiber of Y-axis fiber ring, n2Number of fiber layers of the Z-axis fiber ring, n1And n2The number of the obtained layers of the cushion fibers is calculated, and the whole number is added with one;
by calculating the obtained number of the pad fiber layers, the frequency offset of the fiber rings of a plurality of axes on the triaxial fiber optic gyroscope can be realized while the structure of the fiber optic gyroscope is not changed, so that the frequency offset interference caused by the fact that the characteristic frequency is close to each other can be eliminated, only the number of the underlying fiber layers of the fiber rings needs to be improved, the original design scheme of the fiber optic gyroscope does not need to be changed, and the research and development cost can be effectively reduced;
preferably, the optical fiber of the pad fiber is consistent with the type of the optical fiber, the diameter of the optical fiber and the coating material of the surrounding ring optical fiber of the optical fiber ring in the step S4; when optical fiber rings of a Y axis and a Z axis are wound, the number of winding layers of the original Y axis optical fiber ring and the number of winding layers of the Z axis optical fiber ring are unchanged, optical fibers are padded between the winding optical fibers and a ring framework of the optical fiber ring, the number of the obtained padding layers is calculated according to the steps, the optical fibers which are the same as the optical fibers wound on the optical fiber ring in type, the same diameter and the same coating material are selected as bottoming optical fibers, and the optical fibers are padded on the outer surface of the ring framework of the optical fiber ring and the inner lining surface of the optical fiber ring;
the single-mode optical fiber with the same coating material and the same diameter as the surrounding optical fiber is adopted by the backing optical fiber, so that the manufacturing cost of the optical fiber gyroscope is further reduced, the thermal stress changes of the backing optical fiber and the surrounding optical fiber are consistent, and the effects of protecting the inner-layer optical fiber and slowing down the influence of external thermal effect can be achieved;
preferably, the optical fiber of the pad fiber in step S4 is a single mode optical fiber, the cladding diameter of which is 60 μm, and the coating diameter R4100 μm, diameter error Δ R4Less than or equal to 1 mu m; to around environmental protection polarisation fibre diameter error, optical fiber ring width design error, optical fiber ring internal diameter requirement etc. control, the coiling number of turns on every layer of control optical fiber ring that can be effectual for the optical fiber ring has better coiling quality and the long control of more accurate optical fiber ring, makes the mistake frequency more accurate, is favorable to improving optical fiber gyroscope's precision.
In an embodiment, the present invention further provides a triaxial fiber optic gyroscope, where the triaxial fiber optic gyroscope includes an X-axis fiber ring, a Y-axis fiber ring, and a Z-axis fiber ring, and the structural parameters of the fiber optic rings are obtained based on the characteristic frequency of the X-axis fiber ring, and the Y-axis fiber ring and the Z-axis fiber ring are wound according to the winding method in the above step;
as shown in fig. 2, a schematic diagram illustrating the test results of a fiber optic gyroscope with zero-bias oscillation is shown, and the accuracy of the gyroscope is 0.014 °/h; the triaxial fiber-optic gyroscope provided by the embodiment of the invention, which is applied to the method provided by the embodiment of the invention, comprises the following steps:
s1, carrying out zero offset test on the optical fiber ring of each axis in the triaxial optical fiber gyro on a plurality of different pulling offset frequencies, and judging whether the triaxial optical fiber gyro has oscillation phenomenon;
s2, if there is no oscillation phenomenon in the triaxial fiber optic gyroscope, acquiring a first frequency difference of the Y-axis fiber optic ring relative to the X-axis fiber optic ring, and further acquiring a second frequency difference of the Y-axis fiber optic ring relative to the Z-axis fiber optic ring;
s3, calculating the total length of the optical fiber to be wound by the Y-axis optical fiber ring and the Z-axis optical fiber ring respectively based on the first frequency difference and the second frequency difference;
s4, acquiring the number of winding layers of a Y-axis fiber ring and a Z-axis fiber ring, and respectively determining the number of layers of the Y-axis fiber ring and the Z-axis fiber ring which need to be padded with fibers based on the total length of optical fibers needing to be wound by the Y-axis fiber ring and the Z-axis fiber ring;
s5, according to the number of layers of the Y-axis fiber ring and the Z-axis fiber ring needing to be padded, which is determined in the step S4, the Y-axis fiber ring and the Z-axis fiber ring are padded respectively;
preferably, the optical fiber of the pad fiber is consistent with the type of the optical fiber, the diameter of the optical fiber and the coating material of the surrounding ring optical fiber of the optical fiber ring in the step S4; when optical fiber rings of a Y axis and a Z axis are wound, the number of winding layers of the original Y axis optical fiber ring and the number of winding layers of the Z axis optical fiber ring are unchanged, optical fibers are padded between the winding optical fibers and a ring framework of the optical fiber ring, the number of the obtained padding layers is calculated according to the steps, the optical fibers which are the same as the optical fibers wound on the optical fiber ring in type, the same diameter and the same coating material are selected as bottoming optical fibers, and the optical fibers are padded on the outer surface of the ring framework of the optical fiber ring and the inner lining surface of the optical fiber ring;
the single-mode optical fiber with the same coating material and the same diameter as the winding optical fiber is adopted by the backing optical fiber, so that the manufacturing cost of the optical fiber gyroscope is further reduced, the thermal stress change of the backing optical fiber and the winding optical fiber is consistent, and the effects of protecting the inner-layer optical fiber and slowing down the influence of external thermal effect can be achieved.
The triaxial fiber optic gyroscope subjected to fiber padding through the steps is subjected to zero-bias test, the obtained test result is shown in fig. 3, the obtained precision is 0.0045 degrees/h, and it can be seen that the triaxial fiber optic gyroscope subjected to improvement through the steps provided by the embodiment of the invention has higher precision, and the fiber optic gyroscope is improved through the steps, only the original fiber optic gyroscope needs to be padded, the structure of the original fiber optic gyroscope does not need to be improved, and the research, development and manufacturing costs are greatly saved.
The present application also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the above-mentioned method. The computer-readable storage medium may include, but is not limited to, any type of disk including floppy disks, optical disks, DVD, CD-ROMs, microdrive, and magneto-optical disks, ROMs, RAMs, EPROMs, EEPROMs, DRAMs, VRAMs, flash memory devices, magnetic or optical cards, nanosystems (including molecular memory ICs), or any type of media or device suitable for storing instructions and/or data.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some service interfaces, devices or units, and may be an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present application may be substantially implemented or a part of or all or part of the technical solution contributing to the prior art may be embodied in the form of a software product stored in a memory, and including several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned memory comprises: various media capable of storing program codes, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by a program, which is stored in a computer-readable memory, and the memory may include: flash disks, Read-Only memories (ROMs), Random Access Memories (RAMs), magnetic or optical disks, and the like.
The above description is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure should not be limited thereby. That is, all equivalent changes and modifications made in accordance with the teachings of the present disclosure are intended to be included within the scope of the present disclosure. Embodiments of the present disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A method for winding a fiber ring of a triaxial fiber optic gyroscope is characterized by comprising the following steps:
s1, carrying out zero offset test on the optical fiber ring of each axis in the triaxial optical fiber gyro on a plurality of different pulling offset frequencies, and judging whether the triaxial optical fiber gyro has oscillation phenomenon;
s2, if there is no oscillation phenomenon in the triaxial fiber optic gyroscope, acquiring a first frequency difference of the Y-axis fiber optic ring relative to the X-axis fiber optic ring, and further acquiring a second frequency difference of the Y-axis fiber optic ring relative to the Z-axis fiber optic ring;
s3, calculating the total length of the optical fiber to be wound by the Y-axis optical fiber ring and the Z-axis optical fiber ring respectively based on the first frequency difference and the second frequency difference;
s4, acquiring the number of winding layers of a Y-axis fiber ring and a Z-axis fiber ring, and respectively determining the number of layers of the Y-axis fiber ring and the Z-axis fiber ring which need to be padded with fibers based on the total length of the optical fibers needing to be wound by the Y-axis fiber ring and the Z-axis fiber ring;
s5 respectively performing fiber padding on the Y-axis fiber ring and the Z-axis fiber ring according to the number of layers of the Y-axis fiber ring and the Z-axis fiber ring which are determined in the step S4 and need to be padded.
2. A method for winding a fiber ring of a triaxial fiber optic gyroscope according to claim 1, wherein the step S1 specifically includes:
s101, acquiring a frequency difference between a Y-axis fiber ring phase and an X-axis fiber ring and a frequency difference between the Y-axis fiber ring and a Z-axis fiber ring by taking a characteristic frequency of the X-axis fiber ring as a reference;
s102, carrying out zero-offset test on the optical fiber ring assembly of each axis in the triaxial optical fiber gyroscope, judging whether the triaxial optical fiber gyroscope has oscillation phenomenon, if so, adjusting the frequency difference and carrying out zero-offset test again until the triaxial optical fiber gyroscope has no oscillation phenomenon.
3. The method of claim 1, wherein in step S3, the required loop length l of the Y-axis fiber optic loop is calculatedyThe length of the winding ring is required to be l for the Z-axis optical fiber ringzApplies the formula:
wherein f is1Is the characteristic frequency of the X-axis fiber ring, c is the speed of light, n is the refractive index of the fiber on the fiber ring, lbdIs the sum of the lengths of the pigtails at the output end of the Y waveguide, Δ f1For said first frequency difference, Δ f2Is the second frequency difference; Δ f1≥0.5kHz、Δf2≥0.5kHz。
4. A method for winding a fiber ring of a triaxial fiber optic gyroscope according to claim 1, wherein in step S4, the number of layers of the Y-axis fiber ring and the Z-axis fiber ring that need to be padded with fibers is determined by applying the following formula:
wherein R is1For the diameter of the looped fiber, the error is Δ R1≤1μm；
R2Is the ring body width of the optical fiber ring (n)3+0.5)·R1≤R2≤n3·R1，n3The number of turns of the first layer is wound;
R3is the ring skeleton inner diameter, R, of the optical fiber ring3Greater than the minimum bend radius of the looped optical fiber;
R4the outer diameter of the optical fiber is encircled;
N1the number of winding layers of the Y-axis optical fiber ring, N2The number of the winding layers of the Z-axis optical fiber ring is set;
wherein n is1Number of layers of spacer fibers for Y-axis fiber rings, n2Number of fiber layers of the Z-axis fiber ring, n1And n2And (4) calculating the number of the obtained pad fiber layers, and rounding and adding one.
5. The method for winding the fiber ring of the triaxial fiber optic gyroscope according to any one of claims 1 to 4, wherein the fiber of the pad fiber is consistent with the type of the fiber, the diameter of the fiber and the coating material of the ring fiber wound in the fiber ring in the step S4.
6. The method for winding the optical fiber ring of the triaxial fiber optic gyroscope according to any one of claims 1 to 4, wherein the optical fiber of the pad fiber in step S4 is a single mode optical fiber, the fiber cladding diameter of the single mode optical fiber is 60 μm, and the fiber coating diameter R of the single mode optical fiber is4100 μm, diameter error Δ R4≤1μm。
7. A triaxial fiber optic gyroscope comprising an X-axis fiber optic ring, a Y-axis fiber optic ring, and a Z-axis fiber optic ring, wherein the Y-axis fiber optic ring and the Z-axis fiber optic ring are wound according to the winding method of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210365855.9A CN114739377A (en) | 2022-04-08 | 2022-04-08 | Optical fiber ring winding method of triaxial optical fiber gyroscope and triaxial optical fiber gyroscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210365855.9A CN114739377A (en) | 2022-04-08 | 2022-04-08 | Optical fiber ring winding method of triaxial optical fiber gyroscope and triaxial optical fiber gyroscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114739377A true CN114739377A (en) | 2022-07-12 |
Family
ID=82280512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210365855.9A Pending CN114739377A (en) | 2022-04-08 | 2022-04-08 | Optical fiber ring winding method of triaxial optical fiber gyroscope and triaxial optical fiber gyroscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114739377A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115371708A (en) * | 2022-10-27 | 2022-11-22 | 武汉利科夫科技有限公司 | Ring winding method capable of accurately controlling center point of optical fiber ring |
| CN115420304A (en) * | 2022-09-16 | 2022-12-02 | 武汉长盈通光电技术股份有限公司 | Combined optical fiber surrounding ring framework and use method thereof |
| CN116007603A (en) * | 2023-03-23 | 2023-04-25 | 中国船舶集团有限公司第七〇七研究所 | Method and device for selecting fiber loop of triaxial fiber-optic gyroscope |
-
2022
- 2022-04-08 CN CN202210365855.9A patent/CN114739377A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115420304A (en) * | 2022-09-16 | 2022-12-02 | 武汉长盈通光电技术股份有限公司 | Combined optical fiber surrounding ring framework and use method thereof |
| CN115371708A (en) * | 2022-10-27 | 2022-11-22 | 武汉利科夫科技有限公司 | Ring winding method capable of accurately controlling center point of optical fiber ring |
| CN115371708B (en) * | 2022-10-27 | 2023-02-14 | 武汉利科夫科技有限公司 | Ring winding method capable of accurately controlling midpoint of optical fiber ring |
| CN116007603A (en) * | 2023-03-23 | 2023-04-25 | 中国船舶集团有限公司第七〇七研究所 | Method and device for selecting fiber loop of triaxial fiber-optic gyroscope |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114739377A (en) | Optical fiber ring winding method of triaxial optical fiber gyroscope and triaxial optical fiber gyroscope | |
| Li et al. | A novel method for determining and improving the quality of a quadrupolar fiber gyro coil under temperature variations | |
| US10677594B2 (en) | Microelectromechanical system (MEMS) device readout with optical directional coupler | |
| US5329349A (en) | Method for tuning fiber optic sensor coils | |
| CN108775898A (en) | A kind of fiber optic loop and preparation method thereof inhibiting optical fibre gyroscope magnetic field susceptibility | |
| CN112740086A (en) | Interference type optical fiber sensor | |
| JP2010210617A (en) | Cavity length modulation in resonator fiber optic gyroscope | |
| CN116380032A (en) | Optical fiber gyro and temperature self-compensation method thereof | |
| EP0895061A2 (en) | Gyro sensor coil with filled optical fiber | |
| CN104180798A (en) | Multi-optical fiber ring tandem uniaxial optical fiber gyroscope and multi-optical fiber ring tandem method | |
| Napoli | 20 years of KVH fiber optic gyro technology: the evolution from large, low performance FOGs to compact, precise FOGs and FOG-based inertial systems | |
| CN218443920U (en) | Distributed high-precision optical fiber gyroscope with reciprocal segmented optical paths | |
| EP0874219B1 (en) | Fiber optic gyroscope | |
| EP3410066B1 (en) | Hollow core fiber pigtail system and method | |
| CN114993283B (en) | Optical fiber winding method capable of accurately controlling turn-changing area of optical fiber loop | |
| CN108088433A (en) | A kind of optical fibre gyro ring tail optical fiber stress turn compensation method | |
| US6040908A (en) | Method for stress tuning fiber optic sensor coils | |
| JP2009134268A (en) | Octupole winding pattern for optical fiber coil | |
| EP1535029B1 (en) | Fibre gyroscope with buffer layers and potting material for the fibre coil | |
| CN114235342A (en) | Optical fiber refractive index temperature coefficient testing method based on optical fiber gyroscope system | |
| Hong et al. | Accurate measurement and enhancement of fiber coil symmetry | |
| Yang et al. | Analysis of fiber-optic coil Shupe effect for different fiber coil winding structure and winding processes optimization | |
| Mohr et al. | Rigorous treatment of fiber-environmental interactions in fiber gyroscopes | |
| Katrycz et al. | On specification and measurement of the IFOG vibration error | |
| Kahveci | Dynamical analysis of the fiber optic coils through multiscale numerical modeling and modal tests |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |