A kind of de-skeleton optical fiber ring orthogonal winding tool and its design method

Abstract

This invention pertains to the design method of optical fiber loop winding fixtures, specifically a fixture and design method for orthogonally winding skeletonized optical fiber loops. The orthogonal winding fixture includes a fixed baffle, a mandrel assembly, a sliding baffle, and a micrometer. The mandrel assembly consists of a mandrel base and an anti-adhesion material ring fitted around one end of the mandrel base. The fixed baffle has an inner hole in the middle, with a guide structure at the center for connection with the mandrel base connector. The sidewall of the inner hole has a clearance fit with the anti-adhesion material ring. The sliding baffle slidably fits onto the surfaces of the mandrel base and the anti-adhesion material ring. The micrometer is fixed to the mandrel base, with its end in contact with the sliding baffle. This invention utilizes this fixture to effectively improve the neatness and consistency of orthogonal winding of skeletonized optical fiber loops, possessing significant practical application value.

Description

Technical Field

[0001] This invention pertains to the design method of optical fiber loop winding fixtures, and relates to a fixture and design method for orthogonally winding fiber loops with a skeleton-free structure. Background Technology

[0002] An interferometric fiber optic gyroscope (IFOG) is a device for measuring angular velocity based on the Sagnac effect, consisting of an interferometer formed by fiber optic loops. The fiber optic loop is the core sensing component of the IFOG, and its performance largely determines the gyroscope's performance. The neatness and consistency of the fiber arrangement are important factors affecting the uniformity of stress distribution within the fiber optic loop, influencing the reciprocity of the optical path, and ultimately affecting the full-temperature and vibration performance of the fiber optic gyroscope.

[0003] Orthogonally wound de-structured fiber loops are currently the fiber loops with the best fiber arrangement neatness and consistency in the engineering field. However, due to limitations such as fiber diameter fluctuations, changes in the orthogonal region, and de-structured process, orthogonally wound de-structured fiber loops have not been truly realized.

[0004] Currently, both domestically and internationally, the orthogonal winding of destructured fiber loops is mainly achieved by laying Xuan paper for leveling during the loop and improving the winding method. These technologies have improved the neatness and consistency of fiber arrangement to a certain extent, but they cannot fundamentally solve the problem of neatness and consistency in the orthogonal winding of destructured fiber loops. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a tooling for orthogonal winding of destructured fiber loops that can effectively improve the neatness and consistency of orthogonal winding of destructured fiber loops.

[0006] In addition, the present invention also provides a design method for the orthogonal winding fixture for the skeletonized optical fiber loop.

[0007] The technical solution of the present invention is as follows: A tooling for orthogonally winding a skeletonized optical fiber loop, comprising a fixed baffle, a mandrel assembly, a sliding baffle, and a micrometer rod. The mandrel consists of a mandrel base and an anti-adhesion material ring fitted around one end of the mandrel base. The fixed baffle has an inner hole in the middle, the center of which is a guide structure for connecting with the mandrel base connector. The sidewall of the inner hole is in clearance fit with the anti-adhesion material ring. The sliding baffle is slidably fitted onto the surfaces of the mandrel base and the anti-adhesion material ring. The micrometer rod is fixed on the mandrel base, and its end contacts the sliding baffle.

[0008] The fixed baffle and the sliding baffle have corresponding grooves on their circumferences.

[0009] The fixed baffle and the sliding baffle have corresponding grooves on their circumferences. The width of the groove is greater than or equal to 50 times the diameter of the optical fiber and is also greater than the thickness of the optical fiber loop. The depth of the groove is equal to the diameter of the optical fiber.

[0010] The fillet radius of the contact edges between the fixed baffle and the sliding baffle and the spindle assembly is less than 1 / 10 of the fiber diameter.

[0011] The guiding length of the sliding baffle guiding structure is not less than the diameter of the optical fiber loop.

[0012] The outer end faces of the fixed baffle and the sliding baffle are coated with an anti-stick material layer.

[0013] The spindle base, fixed baffle, and sliding baffle are made of lightweight, high-temperature resistant alloy.

[0014] A method for designing a fixture for orthogonally winding a skeletonless optical fiber loop includes the following steps:

[0015] Step 1: Determine the basic dimensions of the core assembly, fixed baffle, and sliding baffle based on the design dimensions of the fiber optic loop;

[0016] Step 2: Design the mandrel base, fixed baffle, and sliding baffle of the orthogonal winding tool for the skeletonized optical fiber loop using lightweight high-temperature resistant alloy materials;

[0017] Step 3: After interference fit of the mandrel base and the anti-stick material ring, the outer cylindrical surface is machined.

[0018] Step 4: Based on the diameter of the selected optical fiber and the design dimensions of the optical fiber loop, determine that the width of the trapezoidal control groove is greater than or equal to 50 times the diameter of the optical fiber and is also greater than the thickness of the optical fiber loop. The depth of the groove is equal to the diameter of the optical fiber. Corresponding grooves are opened on the circumference of the fixed baffle and the sliding baffle. This groove is the trapezoidal control groove.

[0019] The fit gap between the fixed baffle and the core assembly should be less than 1 / 10 of the fiber diameter.

[0020] The clearance between the sliding baffle and the core assembly should be less than 1 / 10 of the fiber diameter.

[0021] The contact radius of the fixed baffle and sliding baffle with the core assembly is designed to be less than 1 / 10 of the fiber diameter;

[0022] Design a sliding baffle guide structure with a guide length not less than the diameter of the optical fiber loop;

[0023] Step 5: Design the surface accuracy of the fixed baffle and the sliding baffle to ensure that their parallelism is better than 1 / 5 of the fiber diameter, that is:

[0024] Δa+Δb≤D 光纤 / 5

[0025] Among them, D 光纤 To determine the diameter of the selected optical fiber;

[0026] Step 6: After the fixed baffle and sliding baffle have completed the mechanical forming process, anti-stick material is sprayed on them;

[0027] Step 7: Install a micrometer rod at one end of the mandrel base and adjust the control of the sliding baffle's movement accuracy.

[0028] The beneficial effects of this invention are:

[0029] This invention, through a rationally designed tooling structure, allows for real-time adjustment of the distance between the left and right baffles to an integer multiple of the fiber diameter, precisely controlling the orthogonal region. Simultaneously, it utilizes anti-sticking materials to address the issue of the fiber optic skeleton removal process. Specific advantages are as follows:

[0030] [1] The present invention has a reasonable tooling structure that can adjust the distance between the two baffles in real time to an integer multiple of the fiber diameter, avoiding winding defects such as fiber gaps and fiber stacking during the winding process, and ensuring the smooth orthogonal winding of the debonded fiber loop;

[0031] 2] The orthogonal winding fixture for destructured fiber loops designed in this invention can realize the winding of various orthogonal symmetrical destructured fiber loops with the same or different number of fiber turns per layer.

[0032] 3] The orthogonal winding fixture for fiber optic loops designed in this invention features a trapezoidal control groove in the orthogonal region, which can precisely control the orthogonal region of the fiber optic loop within a reasonable range;

[0033] 4] The orthogonal winding fixture for fiber optic loops designed in this invention uses lightweight high-temperature resistant alloy and anti-sticking material, which can meet the requirements of fiber optic loop debonding process.

[0034] 5] The orthogonal winding fixture for the skeletonless optical fiber loop designed in this invention features a bushing-type guiding structure to prevent wear on the anti-sticking material and ensure the service life of the fixture. Attached Figure Description

[0035] Figure 1 A schematic diagram of an orthogonally wound, skeletonized fiber loop;

[0036] Figure 2 Exploded view of the orthogonal winding fixture for skeletonized optical fiber loops designed using the method provided in this invention;

[0037] Figure 3 A cross-sectional view of the orthogonal winding fixture for a skeletonized optical fiber loop designed using the method provided in this invention;

[0038] Figure 4 A schematic diagram of the trapezoidal groove for orthogonal region control;

[0039] Figure 5This is a schematic diagram of a cross-section of an optical fiber loop;

[0040] The attached figures are labeled as follows: 1-fixed baffle, 2-mandrel assembly, 3-sliding baffle, 4-micrometer rod, 5-orthogonally wound fiber optic loop, 101-trapezoidal groove of fixed baffle, 301-trapezoidal groove of sliding baffle, 102-anti-adhesive coating of fixed baffle, 302-anti-adhesive coating of sliding baffle, 103-guide structure of fixed baffle, 303-guide structure of sliding baffle, 201-mandrel base, 202-anti-adhesive ring, 501-non-orthogonal region, 502-orthogonal region. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings:

[0042] Please see Figure 2 , 3 4. This paper presents an exploded view, a cross-sectional view, and a schematic diagram of the trapezoidal groove for controlling the orthogonal region of a fiber optic loop designed using the method provided by this invention. The orthogonal winding fixture for fiber optic loops of this invention includes a fixed baffle, a mandrel assembly, a sliding baffle, and a micrometer rod. The mandrel assembly comprises a mandrel base and an anti-adhesion material ring fitted onto one end of the mandrel base. The fixed baffle has an inner hole in the middle, the center of which serves as a guide structure for engaging with the mandrel base connector, and the sidewall of the inner hole has a clearance fit with the anti-adhesion material ring. The sliding baffle slidably fits onto the surfaces of the mandrel base and the anti-adhesion material ring. The micrometer rod is fixed to the mandrel base, and its end contacts the sliding baffle.

[0043] This invention relates to a method for designing orthogonal winding fixtures for fiber optic loops. The method employs a sleeve-baffle structure, adjusting the distance between the two baffles precisely to an integer multiple of the fiber diameter using a micrometer. Control trapezoidal grooves are designed in the orthogonal regions corresponding to the fiber loops on the two baffles to accommodate the transition fiber segments spanning layers and turns, thus precisely controlling the orthogonal region. The fixture substrate is made of a lightweight, high-temperature resistant alloy, and an anti-sticking material coating (or ring) is sprayed (or installed) on its surface to achieve the de-skewing process for orthogonal winding of the fiber loops. Bushing-type guide structures are designed at the installation points of the two baffles to prevent wear on the anti-sticking material and ensure the service life of the fixture.

[0044] The specific process of the tooling design method for orthogonal winding of fiber optic loops according to the present invention is as follows:

[0045] Step 1: Determine the basic dimensions of the core assembly, fixed baffle, and sliding baffle based on the design dimensions of the fiber optic loop;

[0046] Step 2: The mandrel base, fixed baffle and sliding baffle of the orthogonal winding tooling for the debonded fiber loop are made of lightweight high temperature resistant alloy to reduce the overall weight of the tooling and avoid the application of anti-stick material or deformation of the tooling during use.

[0047] Step 3: Design the interference fit assembly of the mandrel base and the anti-stick material ring and then perform the assembly machining to ensure that the outer circumferential surface of the mandrel base and the outer circumferential surface of the anti-stick material ring are coplanar;

[0048] Step 4: Based on the diameter of the selected optical fiber and the design dimensions of the optical fiber loop, determine that the width of the trapezoidal control groove is greater than or equal to 50 times the diameter of the optical fiber and greater than the thickness of the optical fiber loop. The depth of the groove is equal to the diameter of the optical fiber. This ensures that the transition section of the optical fiber between layers and turns in the optical fiber loop is placed in the trapezoidal groove, while avoiding the occurrence of optical fiber collapse.

[0049] Step 5: Design the fitting gap between the fixed baffle and the core assembly, which should be less than 1 / 10 of the fiber diameter to ensure that the fixed baffle is perpendicular to the outer circumferential surface of the core assembly, while preventing the fiber from being trapped in the fitting gap.

[0050] The fitting gap between the sliding baffle and the core assembly is designed to be less than 1 / 10 of the fiber diameter to ensure that the sliding baffle is perpendicular to the outer circumferential surface of the core assembly, while preventing the fiber from getting stuck in the fitting gap.

[0051] Step 6: Design the contact edge radius of the fixed baffle and sliding baffle with the mandrel assembly to be less than 1 / 10 of the fiber diameter to avoid the fiber part falling into the mating gap.

[0052] Step 7: Design a sliding baffle guide structure with a guide length not less than the diameter of the fiber optic loop to ensure smooth sliding of the sliding baffle without wobbling;

[0053] Step 8: Design the surface accuracy of the fixed baffle and the sliding baffle to ensure that their parallelism is better than 1 / 5 of the fiber diameter. This ensures that when winding each layer of fiber from the inner to the outer side of the fiber loop, the distance between the two baffles is an integer multiple of the fiber diameter.

[0054] Δa+Δb≤D 光纤 / 5

[0055] Among them, D 光纤 To determine the diameter of the selected optical fiber;

[0056] Step 9: After the mechanical forming process is completed, the fixed baffle and the sliding baffle are coated with anti-stick material to ensure that the fiber loop does not stick to the baffle, thus realizing the skeleton removal process of orthogonally wound fiber loop.

[0057] Step 10: Install a micrometer rod at one end of the mandrel base, adjust the distance between the two baffles to be an integer multiple of the fiber diameter, and adjust the control of the sliding baffle movement accuracy to be better than 10μm.

Claims

1. A fixture for orthogonally winding a skeletonless optical fiber loop, characterized in that, The device includes a fixed baffle, a mandrel assembly, a sliding baffle, and a micrometer rod. The mandrel assembly consists of a mandrel base and an anti-adhesion material ring fitted onto one end of the mandrel base. The fixed baffle has an inner hole in the middle, with a guide structure at the center of the inner hole for connecting with the mandrel base connector. The sidewall of the inner hole is clearance-fitted with the anti-adhesion material ring. The sliding baffle is slidably fitted onto the surfaces of the mandrel base and the anti-adhesion material ring. The micrometer rod is fixed on the mandrel base, and its end contacts the sliding baffle.

2. The orthogonal winding fixture for fiber optic loops according to claim 1, characterized in that, The fixed baffle and the sliding baffle have corresponding grooves on their circumferences.

3. The orthogonal winding fixture for fiber optic loops according to claim 2, characterized in that, The fixed baffle and the sliding baffle have corresponding grooves on their circumferences. The width of the groove is greater than or equal to 50 times the diameter of the optical fiber and is also greater than the thickness of the optical fiber loop. The depth of the groove is equal to the diameter of the optical fiber.

4. The orthogonal winding fixture for de-structured optical fiber loops according to claim 1, characterized in that, The fillet radius of the contact edges between the fixed baffle and the sliding baffle and the spindle assembly is less than 1 / 10 of the fiber diameter.

5. The orthogonal winding fixture for fiber optic loops according to claim 1, characterized in that, The guiding length of the sliding baffle guiding structure is not less than the diameter of the optical fiber loop.

6. The orthogonal winding fixture for fiber optic loops according to claim 1, characterized in that, The outer end faces of the fixed baffle and the sliding baffle are coated with an anti-stick material layer.

7. The orthogonal winding fixture for de-scaffolded optical fiber loops according to claim 1, characterized in that, The spindle base, fixed baffle, and sliding baffle are made of lightweight, high-temperature resistant alloy.

8. A method for designing a fixture for orthogonal winding of a skeletonized optical fiber loop, characterized in that, Includes the following steps: Step 1: Determine the basic dimensions of the core assembly, fixed baffle, and sliding baffle based on the design dimensions of the fiber optic loop; Step 2: Design the mandrel base, fixed baffle, and sliding baffle of the orthogonal winding tool for the skeletonized optical fiber loop using lightweight high-temperature resistant alloy materials; Step 3: After interference fit of the mandrel base and the anti-stick material ring, the outer cylindrical surface is machined. Step 4: Based on the diameter of the selected optical fiber and the design dimensions of the optical fiber loop, determine that the width of the trapezoidal control groove is greater than or equal to 50 times the diameter of the optical fiber and is also greater than the thickness of the optical fiber loop. The depth of the groove is equal to the diameter of the optical fiber. This groove is the corresponding groove opened on the circumference of the fixed baffle and the sliding baffle. The fit gap between the fixed baffle and the core assembly should be less than 1 / 10 of the fiber diameter. The clearance between the sliding baffle and the core assembly should be less than 1 / 10 of the fiber diameter. The contact radius of the fixed baffle and sliding baffle with the core assembly is designed to be less than 1 / 10 of the fiber diameter; Design a sliding baffle guide structure with a guide length not less than the diameter of the optical fiber loop; Step 5: Design the surface accuracy of the fixed baffle and the sliding baffle to ensure that their parallelism is better than 1 / 5 of the fiber diameter, that is: Δa+Δb≤D 光纤 / 5 Among them, D 光纤 To determine the diameter of the selected optical fiber; Step 6: After the fixed baffle and sliding baffle have completed the mechanical forming process, anti-stick material is sprayed on them; Step 7: Install a micrometer rod at one end of the mandrel base and adjust the control of the sliding baffle's movement accuracy.

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