Mounting table body structure of optical fiber inertial measurement unit and optical fiber inertial measurement unit

Abstract

The utility model discloses a mounting table body structure of an optical fiber inertial measurement unit and the optical fiber inertial measurement unit, the mounting table body structure comprises a table body and four damping mounting seats, the four damping mounting seats are staggered in the vertical direction of the table body, and a damping component is mounted at each damping mounting seat. The optical fiber inertial measurement unit comprises a shell, a sensitive assembly and an installation table body structure, the sensitive assembly and the installation table body structure are both located in the shell, the sensitive assembly is installed on a table body, and the shell is connected with a damping installation base through a damping assembly. According to the utility model, the sensitive components in the optical fiber inertial measurement unit are damped in a manner that the damping components are distributed in a spatial four-point staggered manner, and the influence of angular vibration on a product can be effectively reduced while the function of a planar four-point damper is achieved, so that the optical fiber inertial measurement unit is high in angular vibration resistance and impact resistance; meanwhile, the external mounting reference of the optical fiber inertial measurement unit does not relate to a shock absorber, so that the optical fiber inertial measurement unit can be widely applied to various occasions, and the environmental adaptability of the optical fiber inertial measurement unit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of inertial navigation, in particular to a mounting platform structure of a fiber optic inertial group and a fiber optic inertial group. Background Art

[0002] The full name of Fiber Optic Gyroscope Inertial Measurement Unit (FIG-IMU) is a high-precision inertial navigation system that uses fiber optic gyroscopes and accelerometers to measure the angular velocity and linear acceleration of the carrier.

[0003] The main components of a fiber-optic inertial system (FIS) include a fiber-optic gyroscope (FOG), a quartz accelerometer, a temperature control circuit, an I / F circuit, an interface circuit, a motherboard circuit, an instrument power supply, a temperature control power supply, structural components, and external connectors. Fiber-optic gyroscopes and quartz accelerometers are inertial-sensitive devices that directly contact the carrier, necessitating a vibration reduction system to improve the accuracy of the FIS in a vibrating environment.

[0004] Conventional technology for vibration reduction in fiber-optic inertial modules (FIMs) places the sensitive components of the FIM on its base, then uses four-point planar dampers to dampen the entire FIM from the outside. This damping method cannot effectively mitigate the effects of angular vibration on sensitive components, and the exposed dampers can lead to severe aging problems in harsh environments. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide a mounting platform structure and a fiber optic inertial group (FIG) that can effectively mitigate the influence of angular vibration on sensitive components.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A mounting platform structure for an optical fiber inertial group includes a platform and four shock-absorbing mounting seats, wherein the four shock-absorbing mounting seats are respectively located around the platform and at different heights of the platform, so that the four shock-absorbing mounting seats are staggered in the vertical direction of the platform, and a shock-absorbing assembly is installed at each of the shock-absorbing mounting seats.

[0008] Preferably, the horizontal axial distances between any two adjacent shock-absorbing mounting seats are equal, so that the four shock-absorbing mounting seats form a square structure in vertical projection.

[0009] Preferably, the shock absorbing assembly includes a connecting member and two shock absorbers, the two shock absorbers are respectively located on two vertical sides of the shock absorbing mounting seat, and the connecting member passes through the two shock absorbers and the shock absorbing mounting seat.

[0010] Preferably, the four shock-absorbing mounting seats are all protruding from the platform at corresponding positions, and the shock-absorbing mounting seats are also connected to the platform at corresponding positions through reinforcing ribs.

[0011] An optical fiber inertial module comprises a housing and a sensitive component, and also comprises a mounting platform structure of the optical fiber inertial module, wherein the sensitive component and the mounting platform structure are both located within the housing, the sensitive component is mounted on the platform, and the housing is connected to the shock-absorbing mounting seat via the shock-absorbing component.

[0012] Preferably, the minimum distance between the sensitive component and the housing is greater than the maximum deformation dimension of the shock absorbing component.

[0013] Preferably, the shock absorbing assembly includes a connecting piece and two shock absorbers, the two shock absorbers are respectively located on the vertical sides of the shock absorbing mounting seat, and the connecting piece includes a connecting shaft and a connecting nut, the connecting shaft passes through one of the shock absorbers, the shock absorbing mounting seat, and the other shock absorber in sequence and is connected to the shell, and the connecting nut is connected to one end of the connecting shaft protruding from the shock absorber.

[0014] Preferably, the sensitive component includes a fiber optic gyroscope and a quartz flexible accelerometer, the fiber optic gyroscope and the quartz flexible accelerometer are both mounted on the platform and partially protrude from the platform, the four shock-absorbing mounting seats are all protruding from the platform at corresponding positions, and the maximum distance that the shock-absorbing mounting seat protrudes from the platform is greater than the maximum distance that the fiber optic gyroscope and the quartz flexible accelerometer at corresponding positions protrude from the platform.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. The utility model installs the sensitive component by designing a mounting platform structure, and connects it to the shell through a shock-absorbing component. While using the mounting platform structure to achieve a transition connection between the sensitive component and the shell, it also improves the ability of the sensitive component to resist vibration and impact. At the same time, the shock-absorbing mounting seats around the platform in the utility model adopt a design method with a spatial drop, so that the center of gravity of the sensitive component can be adjusted to the geometric center position of the shock absorber mounting surface. In this way, the shock-absorbing components at the shock-absorbing mounting seats with a spatial drop distribution can effectively reduce the impact of various axial angular vibrations on the sensitive component.

[0017] 2. The four shock-absorbing mounting bases of the present invention form a square structure in vertical projection, so that the mounting holes of each shock absorber also form a square structure in vertical projection, so that the sensitive components can have the same shock-absorbing effect in any direction of the X, Y, and Z axes.

[0018] 3. The utility model provides shock absorbers on both vertical sides of the shock-absorbing mounting seat, and uses a connecting shaft to indirectly fix the sensitive component in the shell, thereby avoiding direct contact between the sensitive component and the shell and further improving the impact resistance of the sensitive component.

[0019] 4. The minimum distance between the sensitive component and the shell is greater than the maximum deformation size of the shock-absorbing component, which can avoid collision between the sensitive component and the shell during vibration and impact.

[0020] 5. The maximum distance that the shock-absorbing mounting base protrudes from the platform is greater than the maximum distance that the fiber optic gyroscope and quartz flexible accelerometer protrude from the platform at the corresponding position, so that there is sufficient clearance between the sensitive components and the shell to avoid collision with the shell during vibration and impact.

[0021] 6. The shock absorber of the present invention is located inside the housing, thereby avoiding the serious aging problem caused by the shock absorber being exposed.

[0022] 7. The present invention uses a four-point staggered distribution of shock-absorbing components in space to dampen the vibrations of sensitive components inside the fiber optic inertial group. While having the function of a planar four-point shock absorber, it can effectively reduce the impact of angular vibration on the product. Therefore, the fiber optic inertial group of this solution has strong resistance to angular vibration and impact. At the same time, the external installation base of the fiber optic inertial group does not involve shock absorbers, which can be used in a wider range of places, improving the environmental adaptability of the fiber optic inertial group. In addition, the structure of the present invention makes the shock absorber lighter and the shock absorber smaller, thereby effectively reducing the overall volume of the fiber optic inertial group. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of the installation platform structure of the optical fiber inertial group of the utility model from one perspective;

[0024] Figure 2 This is a structural diagram of the installation platform structure of the optical fiber inertial module of the utility model from another perspective;

[0025] Figure 3 This is a top view of the mounting platform structure of the optical fiber inertial module of the utility model;

[0026] Figure 4 This is a structural diagram of the sensitive component installed on the installation platform of the optical fiber inertial group of the utility model;

[0027] Figure 5 It is a partial cross-sectional view of the optical fiber inertial module of the utility model.

[0028] Description of the accompanying drawings: platform 1, shock-absorbing mounting seat 2, shock absorber 3, connecting nut 4, connecting shaft 5, shell 6. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents selected embodiments of the present invention. Based on the embodiments in 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 present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not require further definition or explanation in subsequent figures. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the figures, or the positions or relationships in which the utility model product is typically placed when in use. These terms are intended solely for ease of description and simplification of the description of the utility model, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance. Furthermore, terms such as "horizontal" and "vertical" do not imply that a component must be absolutely horizontal or overhanging, but rather may be slightly tilted. For example, "horizontal" simply refers to a direction that is more horizontal than "vertical," and does not imply that the structure must be completely horizontal, but rather may be slightly tilted. It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] As attached Figure 1 To the attached Figure 5 As shown, the present invention first provides a mounting platform structure for an optical fiber inertial group, specifically as shown in the attached Figure 1As shown, it includes a platform 1 and four shock-absorbing mounting seats 2. The four shock-absorbing mounting seats 2 are respectively located around the platform 1 and at different heights of the platform 1, so that the four shock-absorbing mounting seats 2 are staggered in the vertical direction of the platform 1. A shock-absorbing assembly is installed at each shock-absorbing mounting seat 2. The shock-absorbing assembly includes a connector and two shock absorbers 3. Figure 5 As shown, two shock absorbers 3 are respectively located on the vertical sides of the shock absorbing mounting base 2, and the connecting member passes through the two shock absorbers 3 and the shock absorbing mounting base 2. The four shock absorbing mounting bases 2 are all protruding from the platform 1 at the corresponding position, and the shock absorbing mounting bases 2 are also connected to the platform 1 at the corresponding position through reinforcing ribs.

[0032] Specifically, the horizontal axial distances between any two adjacent shock-absorbing mounting seats 2 are equal, so that the four shock-absorbing mounting seats 2 form a square structure in vertical projection (as shown in the attached figure). Figure 3 As shown). The four shock-absorbing mounting bases 2 of the present invention form a square structure in vertical projection, so that the mounting holes of each shock absorber 3 also form a square structure in vertical projection, thereby allowing the sensitive component to have the same shock-absorbing effect in any direction of the X, Y, and Z axes.

[0033] For example, Figure 5 As shown, in this specific embodiment, a fiber optic inertial module is provided, including a housing 6 and a sensitive component, and also including the mounting platform structure of the above-mentioned fiber optic inertial module. The sensitive component and the mounting platform 1 structure are both located in the housing 6, and the sensitive component is mounted on the platform 1 (as shown in the attached figure). Figure 4 As shown), the housing 6 is connected to the shock-absorbing mounting seat 2 through a shock-absorbing assembly.

[0034] The utility model installs the sensitive component by designing a mounting platform structure, and connects it to the shell 6 through a shock-absorbing component. While using the mounting platform structure to achieve a transition connection between the sensitive component and the shell 6, it also improves the ability of the sensitive component to resist vibration and impact. At the same time, the shock-absorbing mounting seat 2 around the platform 1 in the utility model adopts a design method with a spatial drop, so that the center of gravity of the sensitive component can be adjusted to the geometric center position of the mounting surface of the shock absorber 3. In this way, the shock-absorbing component at the shock-absorbing mounting seat 2 with a spatial drop distribution can effectively reduce the influence of each axial angular vibration on the sensitive component.

[0035] Specifically, the minimum distance between the sensitive component and the housing 6 is greater than the maximum deformation size of the shock-absorbing component. The minimum distance between the sensitive component and the housing 6 is greater than the maximum deformation size of the shock-absorbing component, which can prevent the sensitive component from colliding with the housing 6 during vibration or impact.

[0036] Specifically, as shown in the attached Figure 5As shown, the shock absorber assembly includes a connector and two shock absorbers 3. The shock absorbers 3 are located in the shell 6, avoiding the serious aging problem caused by the shock absorbers 3 being exposed. The two shock absorbers 3 are respectively located on the vertical sides of the shock absorber mounting seat 2, and the connector includes a connecting shaft 5 and a connecting nut 4. The connecting shaft 5 passes through one of the shock absorbers 3, the shock absorber mounting seat 2, and the other shock absorber 3 in sequence and is connected to the shell 6, and the connecting nut 4 is connected to the end of the connecting shaft 5 that protrudes from the shock absorber 3. The utility model provides shock absorbers 3 on both vertical sides of the shock absorber mounting seat 2, and uses the connecting shaft 5 to indirectly fix the sensitive component in the shell 6, avoiding direct contact between the sensitive component and the shell 6, and further improving the impact resistance of the sensitive component.

[0037] Specifically, the sensitive components include a fiber optic gyroscope and a quartz flexible accelerometer, both of which are mounted on a platform 1 and partially protrude from the platform 1. Four shock-absorbing mounts 2 are each arranged to protrude from the platform 1 at corresponding locations, and the maximum distance that the shock-absorbing mounts 2 protrude from the platform 1 is greater than the maximum distance that the fiber optic gyroscope and quartz flexible accelerometer at the corresponding locations protrude from the platform 1. This maximum distance that the shock-absorbing mounts 2 protrude from the platform 1 is greater than the maximum distance that the fiber optic gyroscope and quartz flexible accelerometer at the corresponding locations protrude from the platform 1, ensuring sufficient clearance between the sensitive components and the housing 6 to prevent collision with the housing 6 during vibration and impact.

[0038] Compared with the prior art, the present invention uses a spatially staggered four-point distribution of shock-absorbing components to dampen the vibrations of sensitive components within the fiber optic inertial module. While having the function of a planar four-point shock absorber 3, it can effectively reduce the impact of angular vibration on the product. Therefore, the fiber optic inertial module of this solution has strong resistance to angular vibration and impact. At the same time, the external installation base of the fiber optic inertial module does not involve the shock absorber 3, which can be used in a wider range of places, improving the environmental adaptability of the fiber optic inertial module. In addition, the structure of the present invention makes the shock absorber lighter and the shock absorber 3 smaller, thereby effectively reducing the overall volume of the fiber optic inertial module.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A mounting platform structure for an optical fiber inertial group, characterized in that: It includes a platform and four shock-absorbing mounting seats, which are respectively located around the platform and at different heights of the platform, so that the four shock-absorbing mounting seats are staggered in the vertical direction of the platform, and a shock-absorbing component is installed at each shock-absorbing mounting seat.

2. The installation platform structure of the optical fiber inertial module according to claim 1, characterized in that: The horizontal axial distances between any two adjacent shock-absorbing mounting seats are equal, so that the four shock-absorbing mounting seats form a square structure in vertical projection.

3. The installation platform structure of the optical fiber inertial module according to claim 1, characterized in that: The shock absorbing assembly includes a connecting piece and two shock absorbers. The two shock absorbers are respectively located on two vertical sides of the shock absorbing mounting seat, and the connecting piece passes through the two shock absorbers and the shock absorbing mounting seat.

4. The installation platform structure of the optical fiber inertial module according to claim 1, characterized in that: The four shock-absorbing mounting seats are all protruding from the platform at corresponding positions, and the shock-absorbing mounting seats are also connected to the platform at corresponding positions through reinforcing ribs.

5. An optical fiber inertial group, comprising a housing and a sensitive component, characterized in that: It also includes the mounting platform structure of the optical fiber inertial group according to claim 1, the sensitive component and the mounting platform structure are both located in the shell, the sensitive component is installed on the platform, and the shell is connected to the shock-absorbing mounting seat through the shock-absorbing component.

6. The optical fiber inertial group according to claim 5, characterized in that: The minimum distance between the sensitive component and the housing is greater than the maximum deformation dimension of the shock absorbing component.

7. The optical fiber inertial group according to claim 5, characterized in that: The shock absorber assembly includes a connecting piece and two shock absorbers, the two shock absorbers are respectively located on the vertical sides of the shock absorber mounting seat, and the connecting piece includes a connecting shaft and a connecting nut. The connecting shaft passes through one of the shock absorbers, the shock absorber mounting seat, and the other shock absorber in sequence and is connected to the shell, and the connecting nut is connected to one end of the connecting shaft protruding from the shock absorber.

8. The optical fiber inertial group according to claim 5, characterized in that: The sensitive components include a fiber optic gyroscope and a quartz flexible accelerometer. The fiber optic gyroscope and the quartz flexible accelerometer are both mounted on the platform and partially protrude from the platform. The four shock-absorbing mounting seats are all protruding from the platform at corresponding positions, and the maximum distance that the shock-absorbing mounting seats protrude from the platform is greater than the maximum distance that the fiber optic gyroscope and the quartz flexible accelerometer protrude from the platform at corresponding positions.

Images