A small vertically distributed inertial navigation device

Abstract

The utility model belongs to the field of inertial navigation technology, specifically a small vertically distributed inertial navigation device, including an inertial navigation frame, the inertial navigation frame, the top of the inertial navigation frame is provided with three optical fiber ring components, the three optical fiber ring components are vertically installed on the inertial navigation frame, ensuring the diameter of the optical fiber ring component, and the outer side is provided with an accelerometer to reduce the error of the installation accuracy. The utility model, by making the accelerometer and the ring line and the component fit together and install, the optical fiber ring components of the three axes are vertically distributed and installed with the accelerometer, thereby reducing the overall diameter size, Y waveguide and other components are installed inside the optical fiber ring component, and the optical fiber ring pigtail and the wire of the accelerometer are connected with the light source and circuit board installed on the side or outside of the inertial navigation device, to form a complete inertial navigation device structure, which greatly improves the space utilization, and is easy to install and highly maintainable.

Description

Technical Field

[0001] The utility model belongs to the technical field of inertial navigation, in particular to a small vertically distributed inertial navigation device. Background Art

[0002] Inertial navigation devices have been widely used in military and civilian fields such as aircraft, missiles, ships, stabilized airborne cameras, and marine navigation. However, the internal components and fiber winding are still relatively complex. Due to the overall appearance and the limited available space of the inertial navigation device, the accuracy of the inertial navigation device cannot be improved and the installation is poor.

[0003] Therefore, a small vertically distributed inertial navigation device is needed to solve the above-mentioned problems. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a small vertically distributed inertial navigation device, which effectively solves the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a small vertically distributed inertial navigation device, comprising an inertial navigation frame, wherein the top of the inertial navigation frame is provided with three optical fiber ring assemblies, the three optical fiber ring assemblies are vertically mounted on the inertial navigation frame to ensure the diameter of the optical fiber ring assembly, and an accelerometer is arranged on the outer side to reduce the error of the installation accuracy.

[0006] Furthermore, an X-fiber ring mounting surface is installed on the top of the inertial navigation skeleton, an X-accelerometer mounting groove is provided on the surface of the X-fiber ring mounting surface, a Y and Z accelerometer mounting grooves are provided on the front of the inertial navigation skeleton, vibration reduction mounting holes are fixedly connected on the front of the inertial navigation skeleton and on both sides of the Y and Z accelerometer mounting grooves, Y and Z fiber ring mounting notches are provided on the front of the inertial navigation skeleton and below the vibration reduction mounting holes, and Y and Z fiber ring mounting threaded holes are provided on the back of the inertial navigation skeleton.

[0007] Furthermore, the fiber optic ring assembly includes a fiber optic ring frame, a fiber optic ring, a fiber coil cover and a Y-waveguide. An accelerometer clearance hole is opened on the top of the fiber optic ring assembly, a fiber optic ring is fixedly connected to the inner side of the inertial navigation frame, the fiber optic ring frame is coiled in the inner cavity of the fiber optic ring, a fiber coil cover is welded to the outer side of the fiber optic ring, and the pigtail of the fiber optic ring is electrically connected to the Y-waveguide.

[0008] Furthermore, the side gap of the vibration-damping mounting hole can be used to mount a circuit board and a light source device, and the pigtail of the optical fiber ring assembly and the wire of the accelerometer are electrically connected to the circuit board and the light source device.

[0009] Furthermore, the inertial navigation frame is provided with two Y and Z optical fiber ring installation slots for installing the optical fiber ring assembly, and is fixed by installing screws in the Y and Z optical fiber ring installation threaded holes.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model installs the accelerometer, the ring line and the assembly together, and the optical fiber ring assembly of the three axes is installed vertically and distributed with the accelerometer, thereby reducing the overall diameter size, and the Y waveguide and other components are installed inside the optical fiber ring assembly, and the optical fiber ring pigtail and the wire of the accelerometer are connected with the light source and the circuit board installed on the side or outside of the inertial navigation device to form a complete inertial navigation device structure, which greatly improves the space utilization, is easy to install, and has high maintainability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the top view and cross-sectional structure of the optical fiber ring assembly of the utility model;

[0015] Figure 3 It is a front view structural diagram of the inertial navigation framework of the utility model;

[0016] Figure 4 It is a rear view structural diagram of the inertial navigation framework of the utility model;

[0017] Figure 5 It is a structural schematic diagram of the installation groove of the X-accelerometer of the utility model.

[0018] In the figure: 1. Fiber optic ring assembly; 2. Accelerometer; 3. Inertial navigation frame; 1-1. Accelerometer clearance hole; 1-2. Fiber optic ring frame; 1-3. Fiber optic ring; 1-4. Coil cover; 1-5. Y waveguide; 3-1. X fiber optic ring mounting surface; 3-2. Y, Z accelerometer mounting groove; 3-3. Vibration reduction mounting hole; 3-4. Y, Z fiber optic ring mounting notch; 3-5. Y, Z fiber optic ring mounting threaded hole; 3-6. X accelerometer mounting groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] Example, by Figure 1-5 The utility model discloses a small vertically distributed inertial navigation device, comprising an inertial navigation skeleton 3, an inertial navigation skeleton 3, three optical fiber ring assemblies 1 are arranged on the top of the inertial navigation skeleton 3, the optical fiber ring assembly 1 comprises an optical fiber ring skeleton 1-2, an optical fiber ring 1-3, a fiber coil cover 1-4 and a Y waveguide 1-5, an accelerometer clearance hole 1-1 is opened on the top of the optical fiber ring assembly 1, the inner side of the inertial navigation skeleton 3 is fixedly connected with the optical fiber ring 1-3, the inner cavity of the optical fiber ring 1-3 is coiled with the optical fiber ring skeleton 1-2, the outer side of the optical fiber ring 1-3 is welded with the fiber coil cover 1-4, the pigtail of the optical fiber ring 1-3 is electrically connected to the Y waveguide 1-5, the side gap of the vibration reduction mounting hole 3-3 can be used to install a circuit board and a light source device, the pigtail of the optical fiber ring assembly 1 and the wire of the accelerometer 2 are electrically connected to the circuit board and the light source device;

[0021] The three fiber optic ring assemblies 1 are vertically mounted on the inertial navigation skeleton 3 to ensure the diameter of the fiber optic ring assembly 1. An accelerometer 2 is arranged on the outer side of 3 to reduce the error of the installation accuracy. An X fiber optic ring mounting surface 3-1 is installed on the top of the inertial navigation skeleton 3. An X accelerometer mounting groove 3-6 is provided on the surface of the X fiber optic ring mounting surface 3-1. A Y, Z accelerometer mounting groove 3-2 is provided on the front of the inertial navigation skeleton 3. A vibration reduction mounting hole 3-3 is fixedly connected to the front of the inertial navigation skeleton 3 and located on both sides of the Y, Z accelerometer mounting groove 3-2. A Y, Z fiber optic ring mounting notch 3-4 is provided on the front of the inertial navigation skeleton 3 and located below the vibration reduction mounting hole 3-3. A Y, Z fiber optic ring mounting threaded hole 3-5 is provided on the back of the inertial navigation skeleton 3. The inertial navigation skeleton 3 is provided with two Y, Z fiber optic ring mounting notches 3-4 for mounting the fiber optic ring assembly 1, and is fixed by mounting screws in the Y, Z fiber optic ring mounting notches 3-4.

[0022] Working principle: Three fiber optic ring assemblies 1 and three accelerometers 2 are installed on the inertial navigation frame 3 to form this device, corresponding to the three axes of XYZ. An accelerometer clearance hole 1-1 is provided in the center of the fiber optic ring assembly 1, so that the accelerometer 2 can be installed inside the fiber optic ring assembly 1 to further save space. The pigtail of the fiber optic ring assembly 1 can be connected to a light source arranged in other parts, and the wire of the accelerometer 2 can be connected to a circuit board arranged in other parts. A shock absorber is installed on the vibration reduction mounting hole 3-3 of the inertial navigation frame 3 and connected to the whole to form a complete inertial navigation device. A small vertically distributed inertial navigation device has the advantages of compact structure, high navigation accuracy, and easy installation.

[0023] The X-axis accelerometer 2 is installed in the accelerometer hole 1-1 of the fiber optic ring assembly 1, and the Y-axis and Z-axis accelerometers 2 are installed in the mounting holes on the back of the Y-axis and Z-axis fiber optic ring assembly 1 to complete the assembly of the inertial navigation device. Four shock absorbers are installed on the vibration reduction mounting holes 3-3, and then connected to the whole through the shock absorbers. The light source and circuit components can be installed on the side or other parts of the inertial navigation device by screws to complete the overall installation.

[0024] The small vertically distributed inertial navigation device structure is mainly suitable for a fiber optic gyroscope with an outer diameter of a fiber optic ring greater than 70 mm, or the size of the fiber optic ring assembly 1 can be further reduced by reducing the size of the accelerometer, thereby further reducing the overall size.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A small vertically distributed inertial navigation device, comprising an inertial navigation framework (3), characterized in that: The inertial navigation frame (3) is provided with three optical fiber ring assemblies (1) on the top of the inertial navigation frame (3), and the three optical fiber ring assemblies (1) are vertically mounted on the inertial navigation frame (3) to ensure the diameter of the optical fiber ring assemblies (1); an accelerometer (2) is provided on the outside of the (3) to reduce the error of installation accuracy.

2. A small vertically distributed inertial navigation device according to claim 1, characterized in that: An X-fiber ring mounting surface (3-1) is installed on the top of the inertial navigation frame (3); an X-accelerometer mounting groove (3-6) is provided on the surface of the X-fiber ring mounting surface (3-1); a Y-accelerometer mounting groove (3-2) is provided on the front of the inertial navigation frame (3); vibration reduction mounting holes (3-3) are fixedly connected on the front of the inertial navigation frame (3) and located on both sides of the Y-accelerometer mounting groove (3-2); Y-fiber ring mounting notches (3-4) are provided on the front of the inertial navigation frame (3) and located below the vibration reduction mounting holes (3-3); and Y-fiber ring mounting threaded holes (3-5) are provided on the back of the inertial navigation frame (3).

3. A small vertically distributed inertial navigation device according to claim 2, characterized in that: The optical fiber ring assembly (1) comprises an optical fiber ring frame (1-2), an optical fiber ring (1-3), a fiber coil cover (1-4) and a Y-waveguide (1-5); an accelerometer clearance hole (1-1) is provided on the top of the optical fiber ring assembly (1); the optical fiber ring (1-3) is fixedly connected to the inner side of the inertial navigation frame (3); the optical fiber ring frame (1-2) is coiled around the inner cavity of the optical fiber ring (1-3); the fiber coil cover (1-4) is welded to the outer side of the optical fiber ring (1-3); and the pigtail of the optical fiber ring (1-3) is electrically connected to the Y-waveguide (1-5).

4. A small vertically distributed inertial navigation device according to claim 3, characterized in that: A circuit board and a light source device can be installed in the side gap of the vibration-damping mounting hole (3-3), and the pigtail of the optical fiber ring assembly (1) and the wire of the accelerometer (2) are electrically connected to the circuit board and the light source device.

5. A small vertically distributed inertial navigation device according to claim 4, characterized in that: The inertial navigation frame (3) is provided with two Y and Z optical fiber ring installation notches (3-4) for installing the optical fiber ring assembly (1), and is fixed by installing screws in the Y and Z optical fiber ring installation threaded holes (3-5).

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