A three-axis integrated fiber-optic gyroscope fiber walking layout structure

Abstract

This application discloses a fiber routing layout structure for a three-axis integrated fiber optic gyroscope, relating to the field of three-axis integrated fiber optic gyroscope design technology. It includes a fiber optic gyroscope stage with a fiber ring, a shock absorber, and grooves. The grooves consist of an annular fiber coiling area, perforations, and surface routing grooves, used to standardize the fiber path. This eliminates the traditional fiber coiling cavity, utilizing the space surrounding the fiber ring for fiber coiling and layout, optimizing the overall architecture, solving the problems of non-standard fiber routing and centroid control, and making it suitable for miniaturized products, thus reducing the overall size.

Description

Technical Field

[0001] This invention relates to the field of three-axis integrated fiber optic gyroscope design technology, and in particular to a fiber routing layout structure for a three-axis integrated fiber optic gyroscope. Background Technology

[0002] In a typical three-axis integrated fiber optic gyroscope stage design, a fiber optic disc cavity is usually planned (e.g., Figure 1 It is used for fiber coiling, and then the fiber is delivered through notches or holes, following the surface to the triaxial fiber ring. There is no fixed path planning when coiling and running the fiber on the surface. It is controlled by the workers during assembly. After the fiber path is determined, it is fixed by dispensing or applying glue.

[0003] When designing a three-axis integrated fiber optic gyroscope platform with vibration damping, the center of mass of the platform (including all components installed on the platform) must be at its geometric center due to the requirements of the vibration damper. Therefore, the mass adjustment configuration needs to be made according to the requirements during the design process.

[0004] If the conventional fiber coil cavity design is followed, the following problems exist: 1. The fiber is coiled in a concentrated manner inside the fiber coil cavity and covered with fixing adhesive. Its weight and center of gravity are difficult to assess, which can easily lead to deviations in the center of gravity configuration and affect the vibration damper effect; 2. Fiber has a minimum bending radius requirement. When there is no planned routing path, it is difficult for assembly workers to accurately follow the requirements, which may result in some fibers having a bending radius that is too small; 3. The fiber coil cavity occupies a large space, which is not conducive to reducing the size and weight of the product when designing miniaturized products. Summary of the Invention

[0005] This application provides a three-axis integrated fiber optic gyroscope fiber routing layout structure, which solves the technical problems of non-standard fiber routing, centroid configuration deviation and large product size in the prior art. By eliminating the traditional fiber coil cavity and adopting a ring-shaped fiber coil area and surface routing groove design, it achieves the technical effects of optimized layout, precise centroid control and product miniaturization.

[0006] This application provides a three-axis integrated fiber optic gyroscope fiber routing layout structure, including a fiber optic gyroscope platform. The fiber optic gyroscope platform includes a fiber optic ring, a vibration damper, and grooves. Multiple surfaces of the fiber optic gyroscope platform are provided with fiber optic rings, and multiple surfaces are provided with grooves. The grooves consist of an annular fiber coil area, perforated wiring grooves, and surface wiring grooves. The annular fiber coil area is located around the fiber optic ring mounting cavity. Three couplers are installed on both sides of the fiber optic ring mounting surface. A vibration damper, a light source, and an accelerometer are also installed on the fiber optic gyroscope platform. The radius of the annular fiber coil region is determined by the minimum bending radius of the optical fiber. When it transitions to the other side, the circular arc tangent transition method is used, and then it goes to the vicinity of the boundary line to be tangent to the surface routing groove line. The purpose is to smoothly transition with the routing groove on the other side. The perforated routing trench is designed with a double-sided transition at both ends. One end has a transition arc, which is the same as the arc of the surface routing trench. The size of the arc is determined by the bending radius of the optical fiber. The other end of the perforated routing trench is tangent to the annular fiber coil area, forming a transition.

[0007] One or more technical solutions provided in this application have at least the following technical effects or advantages: Without the need for a planned fiber optic cavity, the accelerometer has enough space to be arranged in miniaturized products (such as 50-ring and 40-ring gyroscopes) to reduce the overall size of the product. The traditional fiber coil cavity is eliminated, and the fiber is coiled in the annular coiling area around the fiber ring. The remaining space after the fiber ring is installed is used for the layout of couplers, etc. At the same time, in order to match the layout path, surface routing grooves and through-hole routing grooves are designed to optimize the overall layout architecture. This also solves the problems of non-standard fiber routing and difficulty in controlling the weight and centroid of fiber coils in traditional methods. Attached Figure Description

[0008] Figure 1 A schematic diagram of the layout of a traditional three-axis integrated gyroscope; Figure 2 This is a three-dimensional structural diagram of a three-axis integrated fiber optic gyroscope fiber routing layout structure according to the present invention; Figure 3 This is a front view of a three-axis integrated fiber optic gyroscope fiber routing layout structure according to the present invention; Figure 4 This is a BB cross-sectional view of a three-axis integrated fiber optic gyroscope fiber routing layout structure according to the present invention; Figure 5 This is a schematic diagram of the perforated cable routing groove of a three-axis integrated fiber optic gyroscope fiber routing layout structure according to the present invention; Figure 6 This is a diagram of the limiting layer structure of a second embodiment of the fiber routing layout structure of a three-axis integrated fiber optic gyroscope according to the present invention; Figure 7 This is a diagram showing the connection state of the hook and hook components in a second embodiment of the fiber routing layout structure of a three-axis integrated fiber optic gyroscope according to the present invention.

[0009] In the picture: 100. Fiber optic gyroscope; 101. Shock absorber; 102. Fiber optic cable; 103. Coupler; 104. Light source; 105. Accelerometer; 110. Fiber optic ring; 200. Groove; 210. Annular fiber coil area; 220. Through-hole wiring groove; 230. Surface wiring groove; 240. Surface layer; 241. Core layer; 242. Limiting layer; 243. Inner groove; 244. Hook; 250. Fixing strap; 251. Hook and loop. Detailed Implementation

[0010] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0011] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0012] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0013] Example 1: As Figures 2 to 5 As shown, this application discloses a three-axis integrated fiber optic gyroscope fiber routing layout structure, including a fiber optic gyroscope stage 100. The fiber optic gyroscope stage 100 includes a fiber optic ring 110, a shock absorber 101, and a groove 200. Multiple surfaces of the fiber optic gyroscope stage 100 are provided with fiber optic rings 110, and multiple surfaces of the fiber optic gyroscope stage 100 are provided with grooves 200. The grooves 200 are composed of an annular fiber coil area 210, a perforated wiring groove 220, and a surface wiring groove 230. The annular fiber coil area 210 is disposed around the mounting cavity of the fiber optic ring 110. Three couplers 103 are installed on both sides of the mounting surface of the fiber optic ring 110. The fiber optic gyroscope stage 100 is also equipped with a shock absorber 101, a light source 104, and an accelerometer 105.

[0014] The radius of the annular fiber coil region 210 is determined by the minimum bending radius of the optical fiber 102. When it transitions to the other side, the circular arc tangent transition method is adopted, and then it is tangent to the surface wiring groove 230 near the boundary line. The purpose is to smoothly transition with the wiring groove on the other side.

[0015] like Figure 5 As shown, the perforated wiring trench 220 has a double-sided transition design at both ends. One end has a transition arc, which is the same as the arc part of the surface wiring trench 230. The size of the arc is determined by the fiber bending radius. The other end of the perforated wiring trench 220 is tangent to the annular fiber coil area 210, forming a transition.

[0016] Specific implementation: First, the fiber emerges from the light source 104, transitions through the perforated wiring groove 220 to the annular fiber coiling area 210 outside the fiber ring 110, and after coiling, it transitions along the tangential direction to the plane and connects to the coupler 103. There are three couplers 103, and the fiber in the middle also needs to be coiled. The fiber can be coiled on the outer edge of the plane or in the annular fiber coiling area 210 according to the plan, or it can be coiled along the surface wiring groove 230 to the other two surfaces as needed.

[0017] Beneficial effects: Without the need for planning the fiber optic cavity, the accelerometer 105 can have enough space to be laid out in miniaturized products (such as 50-ring and 40-ring gyroscope products), thereby reducing the overall size of the product; The traditional fiber coil cavity is eliminated, and the fiber is coiled in the annular fiber coiling area 210 around the fiber ring 110. The remaining space in the fiber ring 110 is used to arrange the coupler 103 and other components. At the same time, in order to match the layout path, surface routing grooves 230 and through-hole routing grooves 220 are designed to optimize the overall layout architecture and solve the problems of non-standard fiber routing and difficulty in controlling the weight and centroid of fiber coils in traditional methods.

[0018] Example 2: Since the optical fiber 102 and the surface wiring trench 230 rely solely on the fixing adhesive and lack a physical locking structure, when the fixing agent fails, high-frequency vibrations can easily cause the optical fiber to collide with the trench wall, leading to optical signal noise. Therefore, the surface wiring trench 230 is improved. This application proposes the following technical solution to address the above-mentioned technical problems: like Figure 6 and Figure 7 As shown, a wrapping element is provided in the trench 200. The wrapping element consists of a surface layer 240, a core layer 241, and a limiting layer 242. The limiting layer 242 wraps three optical fibers 102. One end of the limiting layer 242 is provided with multiple inner grooves 243, and the other end is provided with multiple fixing straps 250. Hooks 251 are installed on the fixing straps 250, and hooks 244 are installed at the bottom of the inner grooves 243.

[0019] The two sides of the contact surface between the limiting layer 242 and the optical fiber 102 are configured to be concave and convex.

[0020] The surface layer 240, core layer 241, and limiting layer 242 are all made of silicone, with a hardness of Shore 00 (ultra-soft), a hardness of Shore A (medium-hard) for the core layer 241, and a hardness of Shore A (medium-hard) for the limiting layer 242, forming a gradient elasticity.

[0021] One or more technical solutions provided in this application have at least the following technical effects or advantages: First, the limiting layer 242 is pried open, and three optical fibers 102 are placed inside. Due to the elasticity of the limiting layer 242, the optical fibers 102 are wrapped around it. Then, the optical fibers 102 are fixed by applying adhesive. Subsequently, the fixing strap 250 is inserted into the inner groove 243, and hooked by the hook 251 on the fixing strap 250. After long-term use or other factors, the adhesive may fail. After the adhesive fails, it will form cracks or debris, and a cavity will appear inside the limiting layer 242. At this time, under the action of the hook 251 and the hook 244, one side of the limiting layer 242 (the end with the fixing strap 250) moves to the other side. The compression causes multiple optical fibers 102 in this area to become intertwined, and the confinement layer 242 contracts on both sides, reducing the space of the confinement layer 242 in this area. This reduces the collision between optical fibers 102 and the trench wall caused by high-frequency vibration, thus reducing optical signal noise. The intertwining of multiple optical fibers 102 reduces the problem of mutual interference and collision after multiple optical fibers 102 become loose. In addition, the surface layer 240 absorbs high-frequency energy to prevent vibration from being transmitted to the core layer 241. Vibration waves (low-frequency components) that are not dissipated by the surface layer 240 are transmitted to the core layer 241 and are subsequently absorbed by the core layer 241. This layer-by-layer weakening of high-frequency vibration prevents it from directly affecting the optical fibers 102.

[0022] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A three-axis integrated fiber-optic gyroscope fiber-walking layout structure, characterized in that, The fiber optic gyroscope stage (100) is characterized in that it comprises a fiber optic ring (110), a shock absorber (101), and a groove (200). Multiple surfaces of the fiber optic gyroscope stage (100) are provided with fiber optic rings (110), and multiple surfaces of the fiber optic gyroscope stage (100) are provided with grooves (200). Each groove (200) consists of an annular fiber coiling area (210), a perforated wiring groove (220), and a surface wiring groove (230). The traditional fiber coiling cavity is eliminated, and the annular fiber coiling area (210) is located around the mounting cavity of the fiber optic ring (110). The mounting surfaces of the fiber optic ring (110) are located on both sides... Three couplers (103) are installed; a shock absorber (101), a light source (104) and an accelerometer (105) are also installed on the fiber optic gyroscope (100); a wrapping component is provided in the groove (200), which consists of a surface layer (240), a core layer (241) and a limiting layer (242); the limiting layer (242) wraps three optical fibers (102), and a plurality of inner grooves (243) are provided at one end of the limiting layer (242), and a plurality of fixing straps (250) are provided at the other end; hooks (251) are installed on the fixing straps (250), and hooks (244) are installed at the bottom of the inner grooves (243).

2. The three-axis integrated fiber-optic gyroscope (FOG) walking layout structure of claim 1, wherein, The radius of the annular fiber coil region (210) is determined by the minimum bending radius of the optical fiber (102).

3. The fiber routing layout structure of a three-axis integrated fiber optic gyroscope as described in claim 2, characterized in that, The perforated wiring trench (220) is designed with a double-sided transition at both ends. One end has a transition arc, which is the same as the arc part of the surface wiring trench (230). The size of the arc is determined by the bending radius of the optical fiber. The other end of the perforated wiring trench (220) is tangent to the annular fiber coil area (210).

4. The fiber routing layout structure of a three-axis integrated fiber optic gyroscope as described in claim 1, characterized in that, The two sides of the contact surface between the limiting layer (242) and the optical fiber (102) are set in a concave-convex shape.

5. The fiber routing layout structure of a three-axis integrated fiber optic gyroscope as described in claim 1, characterized in that, The surface layer (240), core layer (241), and limiting layer (242) are all made of silicone, with softness and hardness of Shore 00, Shore A, and Shore A, respectively.

Images