High-precision embedded laser inertial navigation body assembly

Abstract

The invention discloses a high-precision embedded laser inertial navigation body assembly, which comprises a three-axis embedded resonant cavity assembly, the three-axis embedded resonant cavity assembly comprises a three-axis quartz accelerometer, an embedded body, a magnetic shielding structure, a cover plate and a shock absorber, the magnetic shielding structure comprises two parts, wherein one part of the three-axis quartz accelerometer is arranged outside the embedded body, the cover plate is arranged on one side of the three-axis embedded resonant cavity assembly, and the cover plate is used for sealing the outsides of the three-axis quartz accelerometer and the embedded body. The structural layout form of the high-precision inertial navigation body assembly is optimized, and the weight of the high-precision inertial navigation body assembly is reduced from 25 kg to 12 kg, so that the application prospect of the high-precision inertial navigation equipment is greatly improved.

Description

Technical Field

[0001] The invention relates to an inertial navigation device, in particular to a high-precision embedded laser inertial navigation body component. Background Art

[0002] The conventional high-precision laser inertial navigation body component is composed of a three-axis high-precision laser gyroscope, a three-axis quartz accelerometer, a body, a magnetic shield, and connectors. The body is the supporting structure of the laser gyroscope. In order to ensure that the laser gyroscope can stably provide high-precision data output, a higher rigidity requirement is imposed on the body, and the body is large in size and heavy in weight. Therefore, the weight of the conventional high-precision laser inertial navigation body component is about 25kg, and the corresponding inertial navigation device weighs more than 100kg. Conventional high-precision laser inertial navigation devices are very heavy and are only suitable for large platforms, which greatly limits the application of high-precision inertial navigation devices. Therefore, it is urgent to design a high-precision embedded laser inertial navigation body component to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a high-precision embedded laser inertial navigation body component. In order to meet the needs of medium-sized platforms for high-precision inertial navigation equipment, a high-precision laser embedded inertial navigation body component is invented. The high-precision laser embedded inertial navigation body component adopts the structure of the laser resonant cavity component embedded body, and through the layout optimization design between the three-axis laser resonant cavity, the three-axis quartz accelerometer, the embedded body, and the magnetic shielding structure, the weight of the laser inertial navigation body component is less than 12kg, which has strong market competitiveness, so as to solve the above-mentioned shortcomings in the prior art.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A high-precision embedded laser inertial navigation body component includes a three-axis embedded resonant cavity component, the three-axis embedded resonant cavity component includes a three-axis quartz accelerometer, an embedded body, a magnetic shielding structure, a cover plate and a vibration damper, the magnetic shielding structure includes two parts, one part of which is arranged on the outside of the embedded body, the cover plate is arranged on one side of the three-axis embedded resonant cavity component, and the cover plate is used to seal the three-axis quartz accelerometer and the outside of the embedded body.

[0006] Preferably, the three-axis embedded resonant cavity components include three, and any two of the three-axis embedded resonant cavity components are perpendicular to each other and are respectively fixedly mounted on the embedded body by four M screws.

[0007] Preferably, the three-axis quartz accelerometer also includes three, two of which are perpendicular to each other and are fixed on the body by three M screws respectively.

[0008] Preferably, the embedded body comprises four inner cavities, wherein three of the inner cavity mounting surfaces are perpendicular to each other, and a triaxial accelerometer is mounted on another inner cavity surface.

[0009] Preferably, the magnetic shielding structure comprises an outer shield and an inner shield, the outer shield is three independent magnetic shields respectively installed in the inner cavity of the embedded body, and the inner shield consists of four magnetic shields directly installed on the outer surface of the embedded body.

[0010] Preferably, the number of the cover plates is four, and the four cover plates are respectively arranged on four inner cavity surfaces of the embedded body, so that the embedded body component forms a closed cuboid.

[0011] Preferably, the vibration absorber is arranged on the embedded body, and the number of the vibration absorbers is eight, and the eight vibration absorbers are distributed at four corners of the top and bottom of the embedded body in 8-point spatial distribution.

[0012] Preferably, the inner magnetic shield is composed of an upper magnetic shield and a lower magnetic shield, the upper magnetic shield is bonded to the inner surface of the cover plate by glue, and the lower magnetic shield is bonded to the inner cavity of the embedded body by glue.

[0013] Preferably, the outer shield includes side magnetic shield one, side magnetic shield two and side magnetic shield three, and the side magnetic shield one, side magnetic shield two and side magnetic shield three have the same structure and function.

[0014] Preferably, the three-axis embedded resonant cavity component comprises an X resonant cavity component, a Y resonant cavity component, and a Z resonant cavity component, and the X resonant cavity component, the Y resonant cavity component, and the Z resonant cavity component are perpendicular to each other.

[0015] In the above technical solution, the present invention provides a high-precision embedded laser inertial navigation body component. In order to meet the needs of medium-sized platforms for high-precision and long-flight inertial navigation equipment, a high-precision embedded laser inertial navigation body component is designed and invented. By optimizing the structural layout of the high-precision inertial navigation body component, the weight of the high-precision inertial navigation body component is reduced from 25kg to 12kg, which greatly improves the application prospects of high-precision inertial navigation equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1A schematic diagram of the structure of a device composition diagram provided for an embodiment of a high-precision embedded laser inertial navigation body component of the present invention.

[0018] Figure 2 A schematic structural diagram of an embedded body component composition diagram provided for an embodiment of a high-precision embedded laser inertial navigation body component of the present invention.

[0019] Description of reference numerals:

[0020] 1 magnetic shielding structure, 1-1 first side magnetic shielding, 1-2 second side magnetic shielding, 1-3 third side magnetic shielding, 2 vibration damper, 3 embedded resonant cavity assembly, 3-1 axis quartz accelerometer, 3-2 embedded body, 3-3 inner shielding device, 4Z resonant cavity assembly, 5X resonant cavity assembly, 6Y resonant cavity assembly. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1-2 As shown, an embodiment of the present invention provides a high-precision embedded laser inertial navigation body component, including a three-axis embedded resonant cavity component 3, the three-axis embedded resonant cavity component 3 includes a three-axis quartz accelerometer 3-1, an embedded body 3-2, a magnetic shielding structure 1, a cover plate and a vibration damper 2.

[0023] The embedded resonant cavity component 3 is the core sensor of the inertial navigation body component, providing angular velocity information for the device.

[0024] The quartz accelerometer is the core sensor of the inertial navigation body component, providing acceleration information for the device.

[0025] Specifically, in this embodiment, it includes a three-axis embedded resonant cavity component 3, the three-axis embedded resonant cavity component 3 includes a three-axis quartz accelerometer 3-1 and an embedded body 3-2, a magnetic shielding structure 1, a cover 3-5 and a shock absorber 2, the magnetic shielding structure 1 includes two parts, one part of which is arranged on the outside of the embedded body 3-2, and the cover is arranged on one side of the three-axis embedded resonant cavity component 3, and the cover is used to seal the outside of the three-axis quartz accelerometer 3-1 and the embedded body 3-2.

[0026] Preferably, the three-axis embedded resonant cavity components 3 include three, and any two of the three-axis embedded resonant cavity components 3 are perpendicular to each other and are respectively fixed on the embedded body by four M4 screws.

[0027] Preferably, the three-axis quartz accelerometer 3 - 1 also includes three, two of which are perpendicular to each other and are fixed on the main body by three M3 screws respectively.

[0028] Preferably, the embedded body 3 - 2 comprises four inner cavities, wherein three of the inner cavity mounting surfaces are perpendicular to each other, and a three-axis accelerometer is mounted on another inner cavity surface.

[0029] Preferably, the magnetic shielding structure 1 comprises an outer shield and an inner shield 3-3, wherein the outer shield is three independent magnetic shields respectively installed in the inner cavity of the embedded body, and the inner shield 3-3 is composed of four magnetic shields directly installed on the outer surface of the embedded body.

[0030] Preferably, the number of cover plates 3 - 5 is four, and the four cover plates 3 - 5 are respectively arranged on the four inner cavity surfaces of the embedded body, so that the embedded body component forms a closed cuboid.

[0031] Preferably, the vibration absorber 2 is arranged on the embedded body, and the number of the vibration absorbers 2 is eight. The eight vibration absorbers 2 are distributed at four corners of the top and bottom of the embedded body in 8-point spatial distribution.

[0032] Preferably, the inner magnetic shield 3-3 consists of an upper magnetic shield and a lower magnetic shield. The upper magnetic shield is bonded to the inner surface of the cover plate 3-5 by 703 glue, and the lower magnetic shield is bonded to the inner cavity of the embedded body by 703 glue.

[0033] Preferably, the outer shield includes a side magnetic shield 1-1, a side magnetic shield 1-2 and a side magnetic shield 1-3, and the side magnetic shield 1-1, the side magnetic shield 1-2 and the side magnetic shield 1-3 have the same structure and function.

[0034] Preferably, the three-axis embedded resonant cavity component 3 comprises an X resonant cavity component 5, a Y resonant cavity component 6, and a Z resonant cavity component 4, and the X resonant cavity component 5, the Y resonant cavity component 6, and the Z resonant cavity component 4 are perpendicular to each other.

[0035] Specifically, in this embodiment, the present invention is further described below in conjunction with the accompanying drawings:

[0036] Please refer to Figure 1 and 2, which is a three-dimensional model of a high-precision embedded laser inertial navigation body component of the present invention. The body component consists of an outer magnetic shield, a vibration damper 2 and an embedded body component 3. The outer magnetic shield consists of two side shielding plates, one side shield and one side shield, which completely wraps the embedded body component, leaving only four outlet holes. The outer magnetic shield is bonded to the embedded body component with 703 glue and fixed by multiple M2 screws. The vibration damper adopts two groups of plane 4-point layout to form a spatial 8-point layout. This layout form can easily ensure the three-axis equal stiffness of the vibration reduction system. Each vibration damper is fixedly installed on the body with two M3 screws. The embedded body component consists of a resonant cavity component, an embedded body, an inner magnetic shield, an accelerometer and a cover plate. The resonant cavity component is fixedly installed in the inner cavity of the embedded body by four M4 screws. The resonant cavity component is divided into three axial directions of X, Y and Z. Each axial direction is perpendicular to each other, and the verticality is determined by the verticality between the three inner cavity mounting surfaces of the body. The embedded body has four inner cavities, three of which are installed with resonant cavity components, and one is installed with a triaxial quartz accelerometer. The flatness of the inner cavity mounting surface for mounting the resonant cavity component is 0.005, and the mounting surfaces are perpendicular to each other, with a verticality not exceeding 0.01. The inner magnetic shield consists of an upper magnetic shield and a lower magnetic shield. The upper magnetic shield is bonded to the inner surface of the cover plate with 703 glue, and the lower magnetic shield is bonded to the inner cavity of the embedded body (the inner cavity for mounting the resonant cavity component) with 703 glue.

[0037] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-precision embedded laser inertial navigation body component, characterized in that: The invention comprises a three-axis embedded resonant cavity component (3), wherein the three-axis embedded resonant cavity component (3) comprises a three-axis quartz accelerometer (3-1), an embedded body (3-2), a magnetic shielding structure (1), a cover plate (3-5) and a vibration damper (2), wherein the magnetic shielding structure (1) comprises two parts, one part of which is arranged outside the embedded body (3-2), and the cover plate (3-5) is arranged on one side of the three-axis embedded resonant cavity component (3), and the cover plate (3-5) is used to seal the outside of the three-axis quartz accelerometer (3-1) and the embedded body (3-2).

2. The high-precision embedded laser inertial navigation body component according to claim 1, characterized in that: The three-axis embedded resonant cavity components (3) include three components, and any two of the three-axis embedded resonant cavity components (3) are perpendicular to each other and are respectively fixedly mounted on the embedded body (3-2) by four M4 screws.

3. The high-precision embedded laser inertial navigation body component according to claim 1, characterized in that: The three-axis quartz accelerometer (3-1) also includes three, two of which are perpendicular to each other and are respectively fixedly mounted on the embedded body (3-2) by three M3 screws.

4. The high-precision embedded laser inertial navigation body component according to claim 1, characterized in that: The embedded body (3-2) comprises four inner cavities, wherein three of the inner cavity mounting surfaces are perpendicular to each other, and a three-axis accelerometer is mounted on another inner cavity surface.

5. The high-precision embedded laser inertial navigation body component according to claim 1, characterized in that: The magnetic shielding structure (1) comprises an outer shield and an inner shield (3-3), wherein the outer shield is installed in the inner cavity of the embedded body (3-2), and the inner shield (3-3) is installed on the outer surface of the embedded body (3-2).

6. The high-precision embedded laser inertial navigation body component according to claim 1, characterized in that: The number of the cover plates (3-5) is four, and the four cover plates (3-5) are respectively arranged on four inner cavity surfaces of the embedded body (3-2), so that the embedded body (3-2) component forms a closed rectangular parallelepiped.

7. The high-precision embedded laser inertial navigation body component according to claim 6, characterized in that: The vibration absorber (2) is arranged on the embedded body (3-2), the number of the vibration absorbers (2) is eight, and the eight vibration absorbers (2) are located at eight vertices of the embedded body.

8. The high-precision embedded laser inertial navigation body component according to claim 1, characterized in that: The inner magnetic shield (3-3) consists of an upper magnetic shield and a lower magnetic shield, the upper magnetic shield is fixedly connected to the inner surface of the cover plate (3-5), and the lower magnetic shield is fixedly connected to the inner cavity of the embedded body (3-2).

9. The high-precision embedded laser inertial navigation body component according to claim 1, characterized in that: The outer shield includes side magnetic shield one (1-1), side magnetic shield two (1-2) and side magnetic shield three (1-3), and the side magnetic shield one (1-1), side magnetic shield two (1-2) and side magnetic shield three (1-3) have the same structure and function.

10. The high-precision embedded laser inertial navigation body component according to claim 1, characterized in that: The three-axis embedded resonant cavity component (3) comprises an X resonant cavity component (5), a Y resonant cavity component (6), and a Z resonant cavity component (4), wherein the X resonant cavity component (5), the Y resonant cavity component (6), and the Z resonant cavity component (4) are perpendicular to each other.

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