Nano-type high-precision all-time star sensor

Abstract

The invention discloses a nano-type high-precision all-day star sensor which comprises a base plate, positioning stand columns are fixedly installed at the four corners of the top of the base plate, an integrated circuit board is fixedly connected between the outer sides of the four positioning stand columns and the base plate through bolts, a square connecting frame is installed at the tops of the four positioning stand columns, and the square connecting frame is fixedly connected with the base plate through bolts. And a top plate is arranged on the square connecting frame. Through the foldable design of the integrated circuit board, the bottom plate and the side plate are connected through the flexible wire bar, so that the integrated circuit board is folded and installed when being matched with the positioning stand column dust collection cube, and therefore, the device can be folded and installed to form a cube structure by utilizing the separated flexible connection design circuit board, and the installation occupied space is greatly saved; and the external protection mechanism is used for carrying out effective anti-interference protection on the circuit board on each surface, so that the mounting structure is more compact, and the anti-interference capability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of star sensors, in particular to a nano-type high-precision all-day star sensor. Background Art

[0002] A star sensor is a high-precision attitude-sensitive measuring instrument. It uses stars as a reference system, can provide accurate spatial orientation and reference, and has the advantages of high precision, strong anti-interference, and independent navigation without relying on other systems. Traditional star sensors are generally used for the navigation of spacecraft such as satellites, spacecraft, and rockets. In recent years, with the continuous development of satellite-inertial combined navigation technology, some foreign institutions have begun to try to apply star sensor technology on platforms such as long-range strategic bombers, critical space vehicles, and warships. Star sensor navigation technology has expanded from simple space applications to near-ground applications (mainly in the stratosphere with an altitude of 12 to 50 kilometers) and even sea level applications. Star sensors have an irreplaceable and important position in the field of autonomous navigation.

[0003] With the increasing accuracy requirements of star sensors, the research and evaluation technology of their low-frequency errors has also gradually developed. The main factors causing the low-frequency errors of star sensors are: residuals of optical system calibration, errors and chromatic aberrations in the star sensor catalog, deformation of the optical-mechanical structure due to temperature changes, etc.; it depends on the product's own characteristics and the product's application environment. Its suppression technology is difficult and has high process requirements.

[0004] Current star sensors are generally composed of two main parts: an extended light tube and a star sensor body. The interior of the star sensor generally consists of a stacked circuit board, an external frame, and a camera assembly. All-day star sensors require a large number of electronic components, and the stacked circuit board structure occupies a large space, resulting in a large volume and making assembly difficult. At the same time, the stacked circuit board structure has poor stability and low anti-interference ability. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a nano-type high-precision all-day star sensor to solve the background technical problems.

[0006] To achieve the above object, the present invention adopts the following technical solution: A nanometer-type high-precision all-day star sensor comprises a base plate, four corners of the top of the base plate are fixedly installed with positioning columns, an integrated circuit board is fixedly connected between the outer sides of the four positioning columns and the base plate by bolts, a square connection frame is installed on the top between the four positioning columns, a top plate is provided on the square connection frame, a through hole is opened on the top plate, a camera is fixedly connected to the inside of the through hole by bolts, a connection seat is fixedly installed on the bottom of the camera, the bottom of the connection seat is plugged between the four positioning columns and the bottom is plugged with the integrated circuit board, and an external protection mechanism is installed between the base plate and the top plate; The integrated circuit board comprises a bottom plate and three side plates, one side of the bottom plate is connected to a side plate via a flexible wire row, and the three side plates are connected in series via the flexible wire row.

[0007] As a further description of the above technical solution: the external protection mechanism includes a plurality of upper bolts, a protective cover and a plurality of lower bolts, the top ends of the upper bolts sequentially penetrate and are threadedly connected to the inside of the protective cover, the square connecting frame and the top plate to connect and fix them, the protective cover is arranged on the outside between the base plate and the four positioning columns, and the lower bolts connect and fix the protective cover and the base plate from the bottom.

[0008] As a further description of the above technical solution: the outer side of the positioning column is provided with two side surfaces which are parallel to the two sides of the corner of the base plate respectively, and the side surfaces are provided with two vertically arranged bolt holes.

[0009] As a further description of the above technical solution: the positioning column is provided with an outwardly facing arc edge, the arc edge is connected to two side surfaces, the bottom of the positioning column is provided with a downwardly open notch, and the bottom plate is inserted into the inside of the notch.

[0010] As a further description of the above technical solution: a vertical surface is provided on one side of the positioning column facing the connecting seat, two parallel and vertical clamping strips are fixedly connected to the vertical surface, and the vertical corners of the connecting seat are clamped between the two clamping strips.

[0011] As a further description of the above technical solution: an extended light tube docking groove is opened on the top plate, and the bottom of the docking groove is connected to the through hole.

[0012] As a further description of the above technical solution: the bottom of the square connection frame is fixedly connected to a limiting square ring, and the outer side of the limiting square ring is in contact with the inner side of the top of the protective cover.

[0013] As a further description of the above technical solution: a highly sensitive COMS sensor is installed on the side panel, and the model of the highly sensitive COMS sensor is GSENSE2020.

[0014] Compared with the prior art, the advantages of the present invention are: This solution uses a foldable design of an integrated circuit board, and uses the bottom plate and the side plate to connect through a flexible wire row, so that it can be folded and installed when it cooperates with the positioning column to vacuum the cube, thereby realizing that the device has a circuit board designed with a separate flexible connection, so that it can be folded and installed to form a cubic structure, which greatly saves the installation space and reduces the difficulty of assembly. This solution uses an external protection mechanism to provide effective anti-interference protection for each side of the circuit board, making the installation structure more compact and improving the anti-interference capability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the unfolded structure of the integrated circuit board of the present invention; Figure 2 It is a front cross-sectional structural schematic diagram of the present invention; Figure 3 for Figure 2 A schematic diagram of the enlarged structure of the middle part A; Figure 4 It is a partial three-dimensional structural schematic diagram of the present invention; Figure 5 It is a schematic diagram of a top cross-sectional structure of the present invention; Figure 6 for Figure 5 Enlarged schematic diagram of the structure of part A in the middle.

[0016] Description of the numbers in the figure: 1. Base plate; 2. Positioning column; 21. Side surface; 22. Bolt hole; 23. Card strip; 24. Vertical surface; 3. Integrated circuit board; 31. Bottom plate; 32. Side plate; 321. COMS sensor; 4. Square connection frame; 41. Limiting square ring; 5. Top plate; 51. Docking groove; 6. Through hole; 7. Camera; 8. Connecting seat; 9. External protection mechanism; 91. Upper bolt; 92. Protective cover; 93. Lower bolt; 10. Arc edge; 11. Notch. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention; See also Figures 1 to 6In the present invention, a nano-type high-precision all-day star sensor includes a base plate 1, four corners of the top of the base plate 1 are fixedly installed with positioning columns 2, the outer sides of the four positioning columns 2 are fixedly connected to the base plate 1 with an integrated circuit board 3 by bolts, a square connection frame 4 is installed on the top between the four positioning columns 2, a top plate 5 is provided on the square connection frame 4, a through hole 6 is opened on the top plate 5, a camera 7 is fixedly connected to the inside of the through hole 6 by bolts, a connecting seat 8 is fixedly installed at the bottom of the camera 7, the bottom of the connecting seat 8 is plugged between the four positioning columns 2 and the bottom is plugged with the integrated circuit board 3, and an external protection mechanism 9 is installed between the base plate 1 and the top plate 5; The integrated circuit board 3 includes a bottom plate 31 and three side plates 32 . One side of the bottom plate 31 is connected to one side plate 32 via a flexible wire row, and the three side plates 32 are connected in series via the flexible wire row.

[0018] In the present invention, the four positioning columns 2 on the base plate 1 form an installation frame, the bottom plate 31 of the integrated circuit board 3 is horizontally inserted between the four positioning columns 2 along the top surface of the base plate 1, and the bottom plate 31 is fixed to the base plate 1 by bolts, and then the side plate 32 directly connected to the bottom plate 31 is bent by the flexible wire row so that it stands vertically and fits the outer side between the two positioning columns 2 to form one face of a cube. Similarly, the other two side plates 32 correspond to the other two faces of the cube respectively, and are locked and fixed to the positioning columns 2 by bolts respectively, so that the integrated circuit board 3 forms a hollow cube structure, which greatly reduces the overall structural volume, and makes the connecting seat 8 and the camera 7 located in the center of the cube, so that the connecting seat The bottom of 8 is docked with the bottom plate 31 to achieve installation, and then the external protection mechanism 9 is used to cover the outside of the cube where the integrated circuit board 3 is located to achieve all-round protection, thereby realizing that the device has a circuit board designed with a separate soft connection so that it can be folded and installed to form a cubic structure, which greatly saves the installation volume and reduces the difficulty of assembly, and uses the external protection mechanism to effectively protect the circuit boards on each side against interference, thereby improving the anti-interference ability. It solves the problem that the all-weather star sensor in the prior art requires a large number of electronic components, and the stacked circuit board structure occupies a large space, resulting in a large volume and difficulty in assembly. At the same time, the stacked circuit board structure has poor structural stability and low anti-interference ability.

[0019] See also Figure 2 and Figure 3 , wherein: the outer protection mechanism 9 includes a plurality of upper bolts 91, a protective cover 92 and a plurality of lower bolts 93, the top ends of the upper bolts 91 successively penetrate and are threadedly connected to the inside of the protective cover 92, the square connection frame 4 and the top plate 5 to connect and fix them, the protective cover 92 is arranged on the outside between the base plate 1 and the four positioning columns 2, and the lower bolts 93 connect and fix the protective cover 92 and the base plate 1 from the bottom.

[0020] In the present invention, the protective cover 92, the square connection frame 4 and the top plate 5 are connected and fixed by the upper bolts 91, and are connected to the protective cover 92 in cooperation with the lower bolts 93 at the bottom, to provide a stable connection protection, thereby improving the anti-interference protection of the cubic structure circuit board.

[0021] See also Figure 4 , wherein: the outer side of the positioning column 2 is provided with two side surfaces 21 which are parallel to the two sides of the corner of the base plate 1 , and the side surface 21 is provided with two bolt holes 22 arranged vertically.

[0022] In the present invention, the side panels 32 on the side and the positioning column 2 are more stably fitted by the side side surfaces 21 on the positioning column 2, and the bolt holes 22 are used to fasten the bolts, so that the installation structure is more compact and stable.

[0023] See also Figure 6 , wherein: the positioning column 2 is provided with an arc-shaped edge 10 facing outward, the arc-shaped edge 10 is connected to two side surfaces 21 , the bottom of the positioning column 2 is provided with a notch 11 open downward, and the bottom plate 31 is inserted into the inside of the notch 11 .

[0024] In the present invention, the curved edge 10 allows the soft wire row between the side panels 32 to fit more smoothly with the outer side of the positioning column 2 when it is bent, avoiding damage to the wire row caused by overly sharp corners, and the structure is more reasonable. At the same time, the notch 11 at the bottom makes it easier for the bottom plate 31 to fit and install with the base plate 1.

[0025] See also Figure 3 and Figure 6 , wherein: a vertical surface 24 is provided on one side of the positioning column 2 facing the connecting seat 8 , and two parallel and vertical clamping strips 23 are fixedly connected to the vertical surface 24 , and the vertical corners of the connecting seat 8 are clamped between the two clamping strips 23 .

[0026] In the present invention, the clamping strips 23 on the vertical surface 24 are used to clamp and bind the side vertical corners of the connecting seat 8, so that the installation effect is more stable and the operating stability of the equipment in a vacuum environment is improved.

[0027] See also Figure 2 , wherein: an extended light tube docking groove 51 is opened on the top plate 5, and the bottom of the docking groove 51 is connected to the through hole 6.

[0028] In the present invention, the extended light tube is docked through the docking groove 51 to facilitate loading and unloading operations, and external light passes through the extended light tube, through the through hole 6 and into the interior of the camera 7 to achieve light introduction.

[0029] See also Figure 3, wherein: the bottom of the square connection frame 4 is fixedly connected with a limiting square ring 41 , and the outer side of the limiting square ring 41 contacts and cooperates with the inner side of the top of the protective cover 92 .

[0030] In the present invention, the top opening of the protective cover 92 is clamped and limited by the limiting square ring 41, so that the connection stability between the protective cover 92 and the top plate 5 is higher.

[0031] See also Figure 1 , wherein: a high-sensitivity COMS sensor 321 is installed on the side plate 32, and the model of the high-sensitivity COMS sensor 321 is GSENSE2020.

[0032] In the present invention, the high-sensitivity COMS sensor 321 has the advantages of light weight, high reliability, high integration, low cost, wide dynamic range, radiation resistance and no ghosting.

[0033] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A nanometer-type high-precision all-day star sensor, comprising a base plate (1), characterized in that: The four corners of the top of the base plate (1) are fixedly mounted with positioning columns (2); an integrated circuit board (3) is fixedly connected between the outer sides of the four positioning columns (2) and the base plate (1) by bolts; a square connection frame (4) is installed on the top between the four positioning columns (2); a top plate (5) is provided on the square connection frame (4); a through hole (6) is opened on the top plate (5); a camera (7) is fixedly connected to the inside of the through hole (6) by bolts; a connection seat (8) is fixedly mounted on the bottom of the camera (7); the bottom of the connection seat (8) is plugged between the four positioning columns (2) and the bottom is plugged with the integrated circuit board (3); an external protection mechanism (9) is installed between the base plate (1) and the top plate (5); The integrated circuit board (3) comprises a bottom plate (31) and three side plates (32); one side edge of the bottom plate (31) is connected to a side plate (32) via a flexible wire row, and the three side plates (32) are connected in series via the flexible wire row.

2. A nanometer-type high-precision all-day star sensor according to claim 1, characterized in that: The outer protection mechanism (9) comprises a plurality of upper bolts (91), a protection cover (92) and a plurality of lower bolts (93), the top ends of the upper bolts (91) successively penetrate and are threadedly connected to the inside of the protection cover (92), the square connection frame (4) and the top plate (5) to connect and fix them, the protection cover (92) is arranged on the outside between the base plate (1) and the four positioning columns (2), and the lower bolts (93) connect and fix the protection cover (92) and the base plate (1) from the bottom.

3. The nanometer-type high-precision all-day star sensor according to claim 1, characterized in that: The outer side of the positioning column (2) is provided with two side surfaces (21) which are parallel to the two sides of the corner of the base plate (1) respectively, and the side surfaces (21) are provided with two bolt holes (22) arranged vertically.

4. A nanometer-type high-precision all-day star sensor according to claim 3, characterized in that: The positioning column (2) is provided with an outwardly facing arc-shaped edge (10), the arc-shaped edge (10) is connected to two side surfaces (21), and the bottom of the positioning column (2) is provided with a downwardly open notch (11), and the bottom plate (31) is inserted into the notch (11).

5. The nanometer-type high-precision all-day star sensor according to claim 1, characterized in that: A vertical surface (24) is provided on one side of the positioning column (2) facing the connecting seat (8), and two parallel and vertical clamping strips (23) are fixedly connected to the vertical surface (24), and the vertical corners of the connecting seat (8) are clamped between the two clamping strips (23).

6. The nanometer-type high-precision all-day star sensor according to claim 1, characterized in that: An extended light tube docking groove (51) is provided on the top plate (5), and the bottom of the docking groove (51) is connected to the through hole (6).

7. The nanometer-type high-precision all-day star sensor according to claim 2, characterized in that: The bottom of the square connection frame (4) is fixedly connected to a limiting square ring (41), and the outer side of the limiting square ring (41) is in contact with the inner side of the top of the protective cover (92).

8. The nanometer-type high-precision all-day star sensor according to claim 1, characterized in that: A high-sensitivity COMS sensor (321) is installed on the side plate (32).

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