Flexible cabin-penetrating optical fiber path planning method and system and optical fiber gyroscope

Abstract

The invention provides a flexible cabin-penetrating optical fiber path planning method and system and an optical fiber gyroscope, optical devices which are to be in optical fiber connection in the optical fiber gyroscope and are located in two working cabins are determined, and the two working cabins have different optical fiber laying surfaces; according to the optical devices located in the different working cabins and the position relation of the two working cabins, path reference information of optical fiber laying is determined, and the path reference information at least comprises a starting connecting surface, a terminating connecting surface, laying surface outer circles of the two working cabins and a cabin penetrating hole between the two working cabins; generating a plurality of optical fiber laying paths based on a preset optical fiber length and the path reference information; according to the multiple pieces of bending information of the optical fiber in each optical fiber laying path, a target optical fiber laying path is determined from the multiple optical fiber laying paths, optical fiber stress represented by the multiple pieces of bending information of the optical fiber in the target laying path is minimum, and the scheme provided by the invention can improve the planning efficiency and reliability of the cabin-penetrating optical fiber laying path.

Description

Technical Field

[0001] This document belongs to the field of fiber optic layout planning, and specifically relates to a flexible fiber optic path planning method through a cabin, a system, and a fiber optic gyroscope. Background Art

[0002] A fiber optic gyroscope is an angular velocity sensor capable of determining the orientation of a moving object. With characteristics such as high precision and sensitivity, small size, and light weight, it has become an inertial navigation instrument widely used in modern aviation, navigation, aerospace, and the defense industry. Currently, fiber optic technology and optoelectronic device technology are advancing rapidly, continuously driving the development of fiber optic gyroscopes towards higher precision and miniaturization, with higher working efficiency and a wider range of applications. At the same time, problems such as difficult assembly and low assembly efficiency have emerged. Flexible optical fibers are a very important part of the optical path of a fiber optic gyroscope, and fiber optic laying is also an extremely important link in the assembly process. Due to its soft and flexible characteristics during the laying process, the optical fiber often undergoes operations such as bending and twisting, which can lead to the generation of stress inside the optical fiber. The presence of fiber optic stress will affect the polarization and stability of light, causing losses in light transmission. Excessive stress will also affect the working life of the optical fiber. Reasonable fiber optic laying path planning can largely ensure the performance and working accuracy of fiber optic gyroscopes. Automatic planning of flexible fiber optic laying paths can effectively promote the batch and automated development of fiber optic gyroscope assembly work, and has very important strategic significance for a country's industrial, defense, and other high-tech developments. Therefore, it is very important to study an automatic planning method for low-stress laying paths of the optical path of fiber optic gyroscopes.

[0003] The spatial positions of the optical devices inside a fiber optic gyroscope are not fixed, and various layout structures can be formed. The structure of a fiber optic gyroscope can be divided into a single-layer structure and a double-layer structure according to the distribution of its optical devices on the structural parts. The single-layer structure is that all optical devices are distributed on the same structural part, and the double-layer structure is that the optical devices are distributed on two structural parts. Considering the size of the optical devices themselves and the specific connection relationship with the structural parts, the optical devices will be distributed in different "working cabins". A working cabin refers to the internal space enclosed by two structural parts or a structural part and the fiber optic gyroscope housing. Affected by the spatial positions of the optical devices, there are two types of fiber optic paths: single-cabin optical fibers and fiber optic cables through the cabin. A fiber optic cable through the cabin refers to an optical fiber in which two optical devices connected by the same optical fiber are located in different "working cabins" inside the fiber optic gyroscope, and it needs to pass through the through-cabin holes on the structural part and be laid on two laying surfaces.

[0004] Currently, fiber optic laying path planning is mostly for two-dimensional planar products, but when facing the assembly problems of three-dimensional space products and complex products (with many parts), the effect of laying path planning is not so ideal.

[0005] Therefore, there is an urgent need in the prior art for a solution that can reliably layout the path planning of the fiber optic cable passing through the cabin. Summary of the Invention

[0006] Aiming at the above problems in the prior art, the purpose of this article is to provide a flexible fiber optic cable path planning method, system and fiber optic gyroscope, which can improve the efficiency and reliability of the path planning for laying the fiber optic cable passing through the cabin.

[0007] In order to solve the above technical problems, the specific technical solutions of this article are as follows:

[0008] On the one hand, this article provides a flexible fiber optic cable path planning method, and the method includes:

[0009] Determine the optical devices located in two working cabins to be connected by the optical fiber in the fiber optic gyroscope, where the two working cabins have different fiber optic cable laying surfaces;

[0010] According to the optical devices located in different working cabins and the positional relationship between the two working cabins, determine the path reference information for laying the fiber optic cable, and the path reference information at least includes the starting connection surface, the terminating connection surface, the outer circles of the laying surfaces of the two working cabins, and the cable passing hole between the two working cabins;

[0011] Based on the preset fiber optic cable length and the path reference information, generate multiple fiber optic cable laying paths;

[0012] According to the multiple bending information of the optical fiber in each fiber optic cable laying path, determine the target fiber optic cable laying path from the multiple fiber optic cable laying paths, where the multiple bending information of the optical fiber in the target laying path represents the minimum optical fiber stress.

[0013] Furthermore, the fiber optic cable laying surfaces of the two working cabins are located in different horizontal planes.

[0014] Furthermore, according to the optical devices located in different working cabins and the positional relationship between the two working cabins, determining the path reference information for laying the fiber optic cable includes:

[0015] Establish a three-dimensional space rectangular coordinate system;

[0016] Determine the fiber optic cable connection information of the optical devices located in the two working cabins, and the fiber optic cable connection information at least includes the starting connection surface and the terminating connection surface;

[0017] Determine the position of the cable passing hole connecting the two working cabins;

[0018] According to the fiber optic cable connection information, the position of the cable passing hole, and the laying surfaces of the two working cabins, combined with the three-dimensional space rectangular coordinate system, determine the path reference information for laying the fiber optic cable.

[0019] Further, based on the preset optical fiber length and the path reference information, a plurality of optical fiber laying paths are generated, including:

[0020] Determine, according to the positional relationship between the starting connection surface and the terminating connection surface and the through-hole, a layout strategy for the optical fiber to extend into and out of the through-hole between the two working cabins, wherein the layout strategy at least includes that the optical fiber extends into and out to meet the minimum bending radius corresponding to the working cabin;

[0021] According to the layout strategy and the preset optical fiber length, multiple optical fiber laying paths are determined.

[0022] Furthermore, for each work cabin, the layout strategy is determined by the following steps:

[0023] According to the positions of the connection surface of the optical device and the through-hole in the working cabin, and the minimum bending radius of the optical fiber, the layout strategy of the optical fiber between the connection surface and the through-hole is determined.

[0024] Further, according to the connection surface of the optical device and the position of the through-hole in the working cabin, and the minimum bending radius of the optical fiber, a layout strategy of the optical fiber between the connection surface and the through-hole is determined, including:

[0025] According to the position of the connection surface of the optical device in the working cabin and the minimum bending radius, determining the closest connection position of the connection surface to the outer circle of the laying surface corresponding to the working cabin;

[0026] When the through hole is on the arc corresponding to the nearest connection position and the connection surface, the optical fiber is laid along the outer circle of the laying surface from the connection surface at least according to the minimum bending radius, and then passes through the through hole;

[0027] When the cabin penetration hole is not on the arc corresponding to the nearest connection position and the connection surface, the optical fiber directly passes through the cabin penetration hole from the connection surface.

[0028] Further, according to the layout strategy and the preset optical fiber length, a plurality of optical fiber laying paths are determined, including:

[0029] Determine the laying direction of the optical fiber according to the starting connection surface and the terminating connection surface, wherein the laying direction includes counterclockwise entry and counterclockwise extension;

[0030] According to the laying direction of the optical fiber and the layout strategy, combined with the preset optical fiber length, multiple optical fiber laying paths are determined.

[0031] Further, according to multiple bending information of optical fibers in each optical fiber laying path, determining a target optical fiber laying path from multiple optical fiber laying paths includes:

[0032] Obtain multiple optical fiber bending radii corresponding to the bending of the optical fiber in each optical fiber laying path;

[0033] Determine the bending degree of the optical fiber in each optical fiber laying path according to the multiple optical fiber bending radii and the number of bends;

[0034] Take the optical fiber laying path with the smallest optical fiber bending degree as the target optical fiber laying path.

[0035] On the other hand, this article also provides a flexible optical fiber path planning system for passing through a cabin, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it implements the flexible optical fiber path planning method as described above.

[0036] Finally, this article also provides an optical fiber gyroscope. The optical fiber gyroscope has multiple working cabins inside. There is at least one through-cabin hole between any two working cabins. At least one optical device is provided in each working cabin. The optical fiber path between the optical devices in different working cabins inside the optical fiber gyroscope is determined by the flexible optical fiber path planning method as described above.

[0037] Adopting the above technical solutions, a flexible optical fiber path planning method, system, and optical fiber gyroscope described in this article determine the optical devices located in two working cabins to be connected by optical fibers in the optical fiber gyroscope, where the two working cabins have different optical fiber laying surfaces; according to the optical devices located in different working cabins and the positional relationship between the two working cabins, determine the path reference information for optical fiber laying, and the path reference information at least includes the starting connection surface, the terminating connection surface, the outer circles of the laying surfaces of the two working cabins, and the through-cabin holes between the two working cabins; based on a preset optical fiber length and the path reference information, generate multiple optical fiber laying paths; according to the multiple bending information of the optical fiber in each optical fiber laying path, determine the target optical fiber laying path from the multiple optical fiber laying paths. Among them, the multiple bending information of the optical fiber in the target laying path represents the minimum optical fiber stress. The solution provided in this article can improve the efficiency and reliability of the optical fiber path planning for passing through the cabin.

[0038] To make the above and other purposes, features, and advantages of this article more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. Description of the Drawings

[0039] In order to more clearly illustrate the technical solutions in the embodiments of this article or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of this article. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1 Shows the schematic diagram of the steps of the flexible fiber optic through-hull path planning method provided by the embodiments in this article;

[0041] Figure 2 Shows the schematic diagram of the optical path composition of the fiber optic gyroscope in the embodiments of this article;

[0042] Figure 3 Shows the schematic diagram of the position of the through-hull hole in the embodiments of this article;

[0043] Figure 4 Shows the schematic diagram of the operation of setting the through-hull fiber optic in the embodiments of this article;

[0044] Figure 5 Shows the schematic diagram of the optical path design of the optical device in the two-dimensional plane design in the embodiments of this article;

[0045] Figure 6 Shows the schematic diagram of the through-hull fiber optic laying path planning in the embodiments of this article;

[0046] Figure 7 Shows the schematic diagram of the through-hull fiber optic coiling path in the embodiments of this article;

[0047] Figure 8 Shows the schematic diagram of the fiber optic laying path at the through-hull hole in the embodiments of this article;

[0048] Figure 9 Shows the schematic diagram of the structure of the computer device in the embodiments of this article. Specific implementation manners

[0049] Next, the technical solutions in the embodiments of this article will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this article. Obviously, the described embodiments are only a part of the embodiments of this article, rather than all the embodiments. Based on the embodiments in this article, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of this article.

[0050] It should be noted that the terms "first", "second", etc. in the specification, claims and the above-mentioned drawings of this article are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this article described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or equipment comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or equipment.

[0051] The spatial positions of the optical devices inside the fiber optic gyro are not fixed and can form various layout structures. The structure of the fiber optic gyro can be divided into a single-layer structure and a double-layer structure according to the distribution of its optical devices on the structural members. The single-layer structure is that all the optical devices are distributed on the same structural member, and the double-layer structure is that the optical devices are distributed on two structural members. Considering the size of the optical devices themselves and the specific connection relationship with the structural members, the optical devices will be distributed in different "working compartments". A working compartment refers to the internal space surrounded by two structural members or a structural member and the fiber optic gyro housing. Affected by the spatial positions of the optical devices, there are two types of fiber optic paths: single-compartment fiber and through-compartment fiber. A through-compartment fiber refers to a fiber in which two optical devices connected by the same fiber are located in different "working compartments" inside the fiber optic gyro, and it needs to pass through the through-compartment holes on the structural member and be laid on two laying surfaces.

[0052] Currently, the fiber optic laying path planning is for most two-dimensional planar products, but when facing the assembly problems of three-dimensional space products and complex products (with many parts), the effect of the laying path planning is not so ideal.

[0053] To solve the above problems, the embodiments of this article provide a flexible through-compartment fiber optic path planning method, which can improve the efficiency and reliability of the through-compartment fiber optic laying. Figure 1 It is a schematic diagram of the steps of a flexible through-compartment fiber optic path planning method provided by the embodiments of this article. This specification provides the method operation steps as described in the embodiments or flowcharts, but based on routine or non-creative labor, it may include more or fewer operation steps. The step sequence listed in the embodiments is only one way among the execution sequences of numerous steps and does not represent the only execution sequence. When the actual system or device product is executed, it can be executed in the order of the embodiments or the method shown in the drawings or executed in parallel. Specifically, as Figure 1 shown, the method may include:

[0054] S101: Determine the optical devices located in two working cabins that need to be fiber-connected in the fiber optic gyroscope, where the two working cabins have different fiber laying surfaces;

[0055] S102: Determine the path reference information for fiber laying based on the optical devices located in different working cabins and the positional relationship between the two working cabins. The path reference information at least includes the starting connection surface, the ending connection surface, the outer circles of the laying surfaces of the two working cabins, and the through-cabin holes between the two working cabins;

[0056] S103: Generate multiple fiber laying paths based on a preset fiber length and the path reference information;

[0057] S104: Determine the target fiber laying path from multiple fiber laying paths according to the multiple bending information of the fiber in each fiber laying path. Among them, the multiple bending information of the fiber in the target laying path represents the minimum fiber stress.

[0058] It can be understood that the working cabin is an independent space inside the fiber optic gyroscope. Optical devices are provided in different spaces. Different optical devices need to be connected by fibers to achieve the transmission of optical signals. Therefore, it is necessary to lay fibers in different spaces. The optical path of the fiber optic gyroscope includes 5 typical optical devices: fiber optic ring, Y waveguide, coupler, detector, and light source. In the enclosed space composed of adjacent structural members, the optical devices that satisfy the optical path connection relationship are connected by fibers, as Figure 2 shown in the schematic diagram of the composition of the fiber optic gyroscope optical path.

[0059] There can be two through-cabin holes, as Figure 3 shown, which can be set on the y-axis of the coordinate system and are symmetric about the y-axis. In some other embodiments, the number of through-cabin holes can also be 1, 3, 4, etc., and the specific number depends on the structural design of the fiber optic gyroscope.

[0060] Considering the special properties of the fiber, many issues need to be noted during fiber laying. For example, when the bending radius of the fiber is too large, large stress will be generated inside it, which will cause attenuation, scattering, or leakage of the optical signal during transmission, affecting the quality of data transmission. Generally, it is required that the bending radius of the fiber shall not be less than 20 times the outer diameter of the fiber. Therefore, during fiber assembly, it is necessary to avoid or reduce the too small or too large change in its bending radius to ensure the normal operation and long-term stability of the fiber transmission system. Design the fiber laying path according to the spatial position and geometric dimensions of the fiber laying surface and the optical device. At the same time, to ensure that the bending radius changes little or remains unchanged when the fiber is bent, the shape of an arc can be used for the design of the fiber laying path.

[0061] In addition, when flexible optical fibers are subjected to path planning, corresponding stresses will be generated due to bending and torsion. To avoid the impact of these stresses on the transmission performance of the optical fibers, it is necessary to release or control them within a certain range as much as possible. For torsional stress, since too long optical fibers need to be coiled and fixed in a certain shape in the structural components, and fusion splicing is required after the optical path connection, the optical fibers on the connection optical path are located between the fusion splicing points of the devices. Therefore, for each optical path, an assembly method of coiling the optical fibers first and then performing fusion splicing should be adopted to release the torsional stress generated during the coiling process of the optical fibers as much as possible, so as to minimize the torsional stress in the optical path. For bending stress, the above-mentioned standard of the bending radius of the optical fiber, that is, the bending radius during the bending of the optical fiber is greater than or equal to 20 times the outer diameter of the optical fiber, can be used to meet the requirements for bending stress. By controlling the torsional stress and bending stress, the low-stress laying path planning of the optical path of the fiber optic gyroscope is finally realized.

[0062] Especially for the laying of the optical fibers passing through the cabin, more factors need to be considered. In addition to the bending stress, the position and quantity of the cabin-piercing holes (i.e., the communication holes between adjacent working cabins) also need to be considered. Therefore, in the embodiments of this specification, by comprehensively considering the bending stress during the laying process of the optical fibers and the position of the cabin-piercing holes, the laying path of the optical fibers passing through the cabin can be determined quickly and efficiently, improving the efficiency and reliability of the laying.

[0063] In the embodiments of this specification, the optical fiber laying surfaces of the two working cabins are located in different horizontal planes.

[0064] Furthermore, according to the optical devices located in different working cabins and the positional relationship between the two working cabins, the path reference information for optical fiber laying is determined, including:

[0065] Establish a three-dimensional space rectangular coordinate system;

[0066] Determine the optical fiber connection information of the optical devices located in the two working cabins, and the optical fiber connection information includes at least the starting connection surface and the terminating connection surface;

[0067] Determine the positions of the cabin-piercing holes connecting the two working cabins;

[0068] According to the optical fiber connection information, the positions of the cabin-piercing holes, and the laying surfaces of the two working cabins, combined with the three-dimensional space rectangular coordinate system, determine the path reference information for optical fiber laying.

[0069] Among them, a three-dimensional rectangular coordinate system can be designed based on the installation reference plane of the fiber optic gyroscope, so that a fiber optic model can be created in the constructed three-dimensional scene by defining, setting, and modifying the geometric parameter information of the fiber optic, and then setting the path reference information of the fiber optic (including the total length of the fiber optic, the starting connection surface, the terminating connection surface, the outer circle of the laying surface, the position of the through-cabin hole, etc., which facilitates the configuration algorithm to automatically plan and screen the laying path, thereby improving the efficiency and reliability of the laying path planning of the through-cabin fiber optic.

[0070] In the embodiments of this specification, based on the preset fiber optic length and the path reference information, a plurality of fiber optic laying paths are generated, including:

[0071] According to the positional relationships between the starting connection surface and the terminating connection surface and the through-cabin hole respectively, determine the layout strategy for the fiber optic to extend into and out of the through-cabin hole between two working cabins. The layout strategy at least includes that the fiber optic extends into and out of to meet the minimum bending radius corresponding to the working cabin where it is located;

[0072] According to the layout strategy and the preset fiber optic length, determine a plurality of fiber optic laying paths.

[0073] Among them, due to the limitation of the bending stress of the fiber optic, when laying the fiber optic, it is necessary to consider the positional relationship between the connection surfaces (i.e., the starting connection surface and the terminating connection surface) and the through-cabin hole. When the corresponding requirements are met, the fiber optic led out from the connection surface can directly pass through the through-cabin hole without generating a large bending stress. When the corresponding requirements are not met, if the fiber optic led out from the connection surface directly passes through the through-cabin hole, it will instead generate a large bending stress, which is not conducive to the normal operation of the fiber optic. Therefore, it is necessary to consider the connection surfaces of the optical devices and the positions of the through-cabin holes in the working cabins, as well as the minimum bending radius of the fiber optic bending to determine the layout strategy between the connection surfaces and the through-cabin holes to avoid problems.

[0074] Specifically, according to the connection surfaces of the optical devices and the positions of the through-cabin holes in the working cabins, as well as the minimum bending radius of the fiber optic bending, determine the layout strategy of the fiber optic between the connection surfaces and the through-cabin holes, including:

[0075] According to the position of the connection surface of the optical device in the working cabin and the minimum bending radius, determine the nearest connection position from the connection surface to the outer circle of the laying surface corresponding to the working cabin;

[0076] When the through-cabin hole is on the arc corresponding to the nearest connection position and the connection surface, the fiber optic is laid from the connection surface along the laying path of the outer circle of the laying surface at least according to the minimum bending radius, and then passes through the through-cabin hole;

[0077] When the cable penetration hole is not on the circular arc corresponding to the nearest connection position and the connection surface, the optical fiber directly passes through the cable penetration hole from the connection surface.

[0078] It can be understood that since the outer circles of the laying surfaces corresponding to different working cabins may be different, therefore, in combination with the position of the connection surface of the optical device in the working cabin and the minimum bending radius of the optical fiber, the nearest connection position of the outer circle edge of the laying surface where the optical fiber allowed to be led out from the connection surface can be determined according to the minimum bending radius. The circular arc formed by this nearest connection position and the connection surface (the circular arc formed by the intersection point of the emission ray from the center of the outer circle of the laying surface to the connection surface and the outer circle and the nearest connection position) is used as the reference circular arc and compared with the cable penetration hole. When the cable penetration hole is on the circular arc, it means that the bending radius of the optical fiber directly laid between the connection surface and the cable penetration hole does not meet the minimum bending radius. The optical fiber needs to be laid along the laying surface outer circle path from the connection surface at least according to the minimum bending radius and then pass through the cable penetration hole, which is equivalent to the optical fiber winding around the laying surface outer circle once and then passing through the cable penetration hole to enter another working cabin. On the contrary, the optical fiber can directly pass through the cable penetration hole from the connection surface, reducing the laying path of the optical fiber and still meeting the corresponding bending requirements.

[0079] In the embodiments of this specification, according to the layout strategy and the preset optical fiber length, multiple optical fiber laying paths are determined, including:

[0080] According to the starting connection surface and the ending connection surface, the laying direction of the optical fiber is determined. The laying direction includes counterclockwise entry and counterclockwise exit;

[0081] According to the laying direction of the optical fiber and the layout strategy, combined with the preset optical fiber length, multiple optical fiber laying paths are determined.

[0082] Since there are two cases of counterclockwise entry and counterclockwise exit for both the starting connection surface and the ending connection surface, these four circular arc path cases are arranged and combined, and different optical fiber path schemes can be generated in combination with different layout strategies. The circular arc bending conditions at the endpoints of each path scheme are different. After the entry and exit directions of the starting connection surface and the ending connection surface are determined, the corresponding layout strategy can also be determined, that is, the laying direction of the optical fiber and the layout strategy are in a one-to-one correspondence relationship. More optical fiber laying paths can be designed in one laying direction through the layout strategy, such as adjusting the bending angle and laying length of the optical fiber, etc.

[0083] According to the multiple bending information of the optical fiber in each optical fiber laying path, the target optical fiber laying path is determined from multiple optical fiber laying paths, including:

[0084] Obtain multiple optical fiber bending radii corresponding to the bending of the optical fiber in each optical fiber laying path;

[0085] Determine the degree of fiber bending for each fiber laying path according to the multiple fiber bending radii and the number of bends;

[0086] Take the fiber laying path with the smallest degree of fiber bending as the target fiber laying path.

[0087] It can be understood that in each laying path, there are multiple bending positions for the optical fiber. In order to select the most suitable path, comprehensive consideration can be carried out, such as the bending radius at each bending position. The sum of the bending radii of each fiber laying path is statistically obtained as the comprehensive bending radius. The larger the comprehensive bending radius, the lower the bending degree of the optical fiber in the entire laying path, and the minimum bending pressure on the optical fiber in the entire path, which can be used as the target fiber laying path.

[0088] In other embodiments, different weights can also be considered for different bending positions. For example, in the same laying path, a larger weight (such as the first weight) is set for the bending radius in the first range, and a smaller weight (such as the second weight) is set in the second range, where the first range is smaller than the second range. In this way, the comprehensive bending radius can be obtained by weighted summation, which can fully consider the influence of small bending radii on the optical fiber, and a more reliable laying path with smaller bending stress can be obtained, improving the optical signal transmission ability of the optical fiber.

[0089] The embodiments of this specification also provide a flexible fiber through-cabin path planning method, which can realize the automatic planning of through-cabin fibers. The specific process is as follows:

[0090] The automatic planning of the flexible fiber laying path is to create a fiber model by defining, setting, and modifying the geometric parameter information of the fiber in the constructed three-dimensional scene, and then set the path reference information of the fiber (including the total length of the fiber, the starting connection surface, the terminating connection surface, the outer circle of the laying surface, the position of the through-cabin hole (only for through-cabin fibers), etc.). The system automatically solves the automatic laying path of the fiber according to the selected path reference information, and finally generates a fiber model with a complete path plan. The specific information defined and operations performed during the planning process include:

[0091] (1) Create a fiber. Set the basic information of the fiber, including the code number, name, fiber radius, and minimum bending radius, etc.

[0092] (2) Set the path reference information of the fiber. Select the starting connection surface, the terminating connection surface, the outer circle of the laying surface, the position of the through-cabin hole (only for through-cabin fibers) in the three-dimensional scene, and set the total length of the fiber. The system automatically solves the low-stress laying path of the fiber, and finally generates the fiber. The specific steps are as follows:

[0093] Step 1: For through-cabin fibers, such as Figure 4As shown in the figure, the user selects the starting connection surface A, the ending connection surface B, the outer circle 1 of the laying surface, the outer circle 2 of the laying surface, the cable penetration hole through the input device, and sets the total length of the optical fiber.

[0094] Step 2: The system solves the optimal path according to the path information selected by the user and displays it in the three-dimensional scene, and finally generates an optical fiber model.

[0095] As Figure 5 shown in the figure, the two-dimensional plane selects the xoy plane, and the coordinate system is set as follows: the horizontal axis is the x-axis, the vertical axis is the y-axis, the vertical axis is the z-axis, and the positive direction of the z-axis is perpendicular to the paper surface and facing outwards. The large circle in the figure is the contour line of the outer circle of the laying surface.

[0096] The design idea of the optical fiber laying path is as follows: calculate the coordinates of the control points of the optical fiber path in the counterclockwise direction, connect the control points to form the optical fiber path, and name the two endpoints of the optical fiber path as the starting point and the ending point in the counterclockwise direction respectively. The starting point and the ending point are determined from the selected starting connection surface and ending connection surface. It can be seen that there are two cases of entering counterclockwise and extending counterclockwise for both the starting connection surface and the ending connection surface. These four circular arc path cases are arranged and combined to generate optical fiber paths with different schemes. The circular arc bending conditions at the endpoints of each path scheme are different. The one with the largest bending radius under comprehensive consideration is taken as the low-stress laying path of the optical fiber. Then calculate the path information, including the coordinates of the circular arc center, the radius of the circular arc, the angle of the circular arc, etc.

[0097] Analyze the optical fiber laying path according to the positional relationship between the detector (or coupler) and the cable penetration hole (for the cable-penetrating optical fiber)

[0098] 1) When the optical fiber is laid on the laying surface 1

[0099] If the connection surface and the cable penetration hole are on the same side, it is necessary to consider whether the laying path of directly passing through the cable penetration hole meets the optical fiber bending radius standard. The method is as follows: As Figure 6 shown in the figure, the angle between the edge of the cable penetration hole and the y-axis is set as δ, and α is the minimum angle value to ensure the optical fiber bending radius standard. When planning the optical fiber laying path, it is necessary to consider the relationship between δ and α. If the optical device is close to the y-axis (the center of the structural member), then δ will be less than α. If directly connected to another optical device through the cable penetration hole, it will cause the deformation of the optical fiber path, the reduction and non-constancy of the bending radius, the increase of the bending stress inside the optical fiber, and the attenuation of the optical signal. At this time, it is necessary to continue laying around the outer circle 1 of the laying surface, increase the laying path length of the optical fiber on the laying surface 1, and then pass through the cable penetration hole.

[0100] 2) When the optical fiber is laid on the laying surface 2

[0101] If the connection surface and the cable penetration hole are on the same side, it is necessary to consider whether the optical fiber directly connected to the optical device through the cable penetration hole meets the optical fiber bending radius. The method is the same as Figure 6, if δ is less than α, it is necessary to continue laying around the outer circle 2 of the laying surface to increase the laying path length of the optical fiber on the laying surface 2, and then connect it to the optical device.

[0102] In the optical fiber laying path, it is necessary to control the length of the optical fiber to avoid problems such as complex assembly processes caused by excessive length, excessive bending of the optical fiber, or inability to complete the optical path connection due to insufficient length. Optical fiber coiling refers to the parallel coiling of the optical fiber when the actual length of the optical path is much greater than the designed path length.

[0103] Basis for coiling optical fiber: Analyze and calculate the radius and angle of the arcs at the starting and ending points of the optical path in the optical fiber laying path design. Use the coordinates of the path control points in three-dimensional space to solve the distance between adjacent control points, and then the sum of the lengths obtained by superposition can be approximately equal to the length of this section of the optical path. Then calculate the optical path length on the outer circle of the laying surface. Since the discrete height can be ignored compared to the radius of this section of the arc, the optical path length on the laying surface is calculated as a whole circle. Subtract the optical fiber lengths at the starting and ending points from the set total optical fiber length, and divide the resulting length by the optical path length on the laying surface (rounding off) to get the result. Analyze the result. If this value is less than 1, normal optical fiber laying cannot be carried out; if this value is equal to 1, no coiling is required; if this value is greater than 1, coiling needs to be carried out according to the specific value. There will be a difference between the coiled length and the total optical fiber length. This error exists in the calculation of the arc lengths at the starting and ending points, the approximation of the optical path length on the laying surface, and ensuring the complete connection of the optical path in line with the designed path. Therefore, the total optical fiber length should be a range value within which a complete path can be planned, and the difference between the actual length and the theoretical length of the optical fiber path can basically be controlled within half of the coiling circumference.

[0104] After coiling the optical fiber passing through the cabin, the height difference of the optical path at the cabin entrance may increase, resulting in an increase in the bending degree of the optical fiber. Therefore, when coiling the optical fiber passing through the cabin, try to take the direction where the coil is close to the laying surface as the coiling direction, and carry out coiling on one laying surface.

[0105] There is a height difference between the optical device and the laying surface. Based on the two-dimensional plane arc, the vertical axis coordinate is added, and the control points on the arc are discretized in the vertical axis direction, that is, starting from the starting and ending points, the vertical axis coordinate values of the control points on the arc path at the optical device connection decrease or increase. The final curve shape presented is a cylindrical helix. When the optical fiber is too long and needs to be coiled, there is also a section of cylindrical helix at the transition between adjacent coiling layers. As a double-cabin transition space, the internal optical path shape of the cabin penetration hole is also a section of cylindrical helix.

[0106] (1) Discretization of the arc path control points at the starting and ending points.

[0107] Keep the shape of the projected arc on the two-dimensional plane unchanged, change the vertical axis coordinate value, and perform a discretization operation of increasing or decreasing the vertical axis coordinate value. For the non-coiled optical fiber path, the height difference before and after discretization is the height of the starting or ending point from the laying surface. For the coiled optical fiber path, the height difference before and after discretization is the height of the starting or ending point from the fiber coil. Thus, complete the path design of the arc path at the starting and ending points in three-dimensional space.

[0108] (2) Discretization of the control points of the arc path on the laying surface

[0109] Based on the shape of the optical fiber laying path on the two-dimensional plane, perform the coiling operation. The three-dimensional graph after coiling is different from the ordinary cylindrical helix. Most of the optical path shapes are parallel arcs parallel to the laying surface plane. The main control point coordinate discretization area is near the tangent point where the arc at the starting or ending point is tangent to the laying surface plane. After the first layer of optical fiber winds around the outer circle of the laying surface and returns to near the above tangent point, then perform the vertical coordinate discretization of the control points, and the height difference is at least the diameter of the optical fiber. At this time, the optical fiber reaches the height of the second layer of fiber coil, and then continue to wind. Similarly, perform the multi-layer coiling operation. The shape presented by the optical fiber segment in the area near the tangent point in space is a cylindrical helix. By increasing or decreasing the vertical axis coordinate, increase the number of fiber coil layers, so that the optical fiber completes the multi-layer coiling operation. As Figure 7 shown in the schematic diagram of the optical fiber coiling path on the laying surface. The discretization process is the same as that of the control points of the arc path at the starting and ending points.

[0110] (3) Discretization of the control points of the arc path at the cable penetration hole

[0111] The principle of discretizing the control points of the arc path at the cable penetration hole is the same as that of the control points of the path at the starting and ending points. The path schematic diagram is as Figure 8 shown.

[0112] In the embodiments of this specification, aiming at the problem of the laying path planning of the flexible cable penetration optical fiber in the fiber optic gyroscope, a method for automatically planning the low-stress laying path of the flexible cable penetration optical fiber is proposed, which can automatically solve the laying path that meets the low-stress requirements of the optical fiber, and can effectively improve the design and assembly efficiency of the fiber optic gyroscope. A system for automatically planning the low-stress laying path of the flexible optical fiber is developed and verified by examples, and good results are obtained, providing an effective tool support for the optical fiber path design of the fiber optic gyroscope in practice.

[0113] This method can complete the automatic layout of the optical fiber under engineering constraint conditions, but in the fiber optic gyroscope, it is also necessary to meet the optical path connection relationship, and at the same time assemble multiple optical fibers and achieve the global path optimization.

[0114] During the fiber - laying path planning, the distribution of control points directly affects the smoothness of the optical fiber. The unevenness of the optical fiber will cause changes in the length of the optical fiber, which will affect the layout result of the optical - fiber path. It is also necessary to optimize and improve the automatic path planning of the low - stress layout path of the optical fiber in the fiber optic gyroscope to obtain a fiber - laying result that conforms to the actual situation.

[0115] In another embodiment of this specification, a flexible fiber - through - cabin path planning system is also provided, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it implements the flexible fiber - through - cabin path planning method as described above.

[0116] In another embodiment of this specification, a fiber optic gyroscope is also provided. There are multiple working cabins inside the fiber optic gyroscope, at least one fiber - through - hole is provided between any two working cabins, and at least one optical device is provided in each working cabin. The optical - fiber path between the optical devices in different working cabins inside the fiber optic gyroscope is determined by the flexible fiber - through - cabin path planning method as described above.

[0117] This embodiment provides a computer device, and its internal structure diagram can be as Figure 9 shown. The computer device includes a processor, a memory, and a network interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non - volatile storage medium and an internal memory. The non - volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non - volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection.

[0118] Those skilled in the art can understand that Figure 9 the structure shown in

[0119] is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the computer device to which the solution of this application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0120] In one embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory, and when the processor executes the computer program, it implements the steps in the above - mentioned method embodiments.

[0121] In one embodiment, a computer program product is provided, including a computer program which, when executed by a processor, implements the steps in the above method embodiments.

[0122] Those of ordinary skill in the art can understand that all or part of the processes in the above method embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the above method embodiments. Among them, any reference to a memory, database, or other medium provided in the various embodiments of the present application can include at least one of non-volatile and volatile memories. Non-volatile memories can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memories can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the various embodiments of the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., and are not limited thereto. The processors involved in the various embodiments of the present application can be general-purpose processors, central processors, graphics processors, digital signal processors, programmable logic devices, data processing logics based on quantum computing, etc., and are not limited thereto.

[0123] It should also be understood that in the embodiments herein, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0124] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the composition and steps of the examples have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this article.

[0125] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0126] In the several embodiments provided in this article, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed couplings or direct couplings or communication connections to each other can be indirect couplings or communication connections through some interfaces, devices, or units, and can also be electrical, mechanical, or other forms of connection.

[0127] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments in this article.

[0128] Specific embodiments are used in this article to elaborate the principles and implementation manners of this article. The description of the above embodiments is only used to help understand the method and its core idea of this article; at the same time, for those of ordinary skill in the art, based on the idea of this article, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be understood as a limitation to this article.

Claims

1. A flexible optical fiber path planning method, characterized in that: The method comprises: Determine an optical device in the fiber optic gyroscope to be connected by optical fiber and located in two working cabins, wherein the two working cabins have different optical fiber laying surfaces; Determine the path reference information of the optical fiber laying according to the optical devices located in different working cabins and the positional relationship between the two working cabins, wherein the path reference information at least includes the starting connection surface, the ending connection surface, the outer circle of the laying surface of the two working cabins, and the cabin penetration hole between the two working cabins; Based on the preset optical fiber length and the path reference information, generate a plurality of optical fiber laying paths; According to multiple bending information of the optical fiber in each optical fiber laying path, a target optical fiber laying path is determined from multiple optical fiber laying paths, wherein the optical fiber stress represented by the multiple bending information of the optical fiber in the target laying path is minimum.

2. The method according to claim 1, characterized in that The optical fiber laying surfaces of the two working chambers are located at different horizontal planes.

3. The method according to claim 1, characterized in that According to the optical devices in different working chambers and the positional relationship between the two working chambers, the reference information of the optical fiber laying path is determined, including: Establish a three-dimensional rectangular coordinate system; Determine the optical fiber connection information of the optical devices located in the two working cabins, wherein the optical fiber connection information at least includes a starting connection surface and an ending connection surface; Determine the location of the through hole connecting the two working cabins; According to the optical fiber connection information, the position of the cabin penetration hole and the laying surfaces of the two working cabins, combined with the three-dimensional rectangular coordinate system, the path reference information of the optical fiber laying is determined.

4. The method according to claim 1, characterized in that Based on the preset optical fiber length and the path reference information, multiple optical fiber laying paths are generated, including: Determine, according to the positional relationship between the starting connection surface and the terminating connection surface and the through-hole, a layout strategy for the optical fiber to extend into and out of the through-hole between the two working cabins, wherein the layout strategy at least includes that the optical fiber extends into and out to meet the minimum bending radius corresponding to the working cabin; According to the layout strategy and the preset optical fiber length, multiple optical fiber laying paths are determined.

5. The method according to claim 4, characterized in that For each work cabin, the layout strategy is determined by the following steps: According to the positions of the connection surface of the optical device and the through-hole in the working cabin, and the minimum bending radius of the optical fiber, the layout strategy of the optical fiber between the connection surface and the through-hole is determined.

6. The method according to claim 5, characterized in that According to the connection surface of the optical device and the position of the through-hole in the working cabin, and the minimum bending radius of the optical fiber, a layout strategy of the optical fiber between the connection surface and the through-hole is determined, including: According to the position of the connection surface of the optical device in the working cabin and the minimum bending radius, determining the closest connection position of the connection surface to the outer circle of the laying surface corresponding to the working cabin; When the through hole is on the arc corresponding to the nearest connection position and the connection surface, the optical fiber is laid along the outer circle of the laying surface from the connection surface at least according to the minimum bending radius, and then passes through the through hole; When the cabin penetration hole is not on the arc corresponding to the nearest connection position and the connection surface, the optical fiber directly passes through the cabin penetration hole from the connection surface.

7. The method according to claim 1, characterized in that Determining multiple optical fiber laying paths according to the layout strategy and the preset optical fiber length, including: Determine the laying direction of the optical fiber according to the starting connection surface and the terminating connection surface, wherein the laying direction includes counterclockwise entry and counterclockwise extension; According to the laying direction of the optical fiber and the layout strategy, combined with the preset optical fiber length, multiple optical fiber laying paths are determined.

8. The method according to claim 1, characterized in that According to multiple bending information of optical fibers in each optical fiber laying path, a target optical fiber laying path is determined from multiple optical fiber laying paths, including: Obtaining multiple optical fiber bending radii corresponding to the bending of optical fibers in each optical fiber laying path; Determining the bending degree of the optical fiber of each optical fiber laying path according to the multiple optical fiber bending radii and bending numbers; The optical fiber laying path with the smallest optical fiber bending degree is taken as the target optical fiber laying path.

9. A flexible fiber-optic path planning system, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the flexible cabin-penetrating optical fiber path planning method as described in any one of claims 1 to 8 is implemented.

10. A fiber optic gyroscope, characterized in that: The fiber optic gyroscope has multiple working cabins inside, at least one cabin penetration hole is provided between any two working cabins, and at least one optical device is provided in each working cabin. The optical fiber path between the optical devices in different working cabins inside the fiber optic gyroscope is determined by the flexible cabin penetration optical fiber path planning method described in any one of claims 1 to 8.

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