Antifouling outer cover of digital sun sensor

Abstract

The invention relates to an antifouling outer cover of a digital sun sensor, and belongs to the technical field of structures. Comprising a digital sun sensor bracket, an antifouling cover body and a digital sun sensor, wherein the digital sun sensor bracket is vertically mounted at the bottom of an external satellite structural plate; the digital sun sensor is mounted in the middle of the lower surface of the digital sun sensor bracket; the antifouling cover body is mounted at the circumferential outer edge of the lower surface of the digital sun sensor bracket to realize circumferential shielding protection of the digital sun sensor; the antifouling cover body is of a gradually-expanded cover body structure with the horizontal section being in an isosceles trapezoid shape. The top of the antifouling cover body is in butt joint with the digital sun sensor support, and the size of the horizontal section of the top of the antifouling cover body is minimum. The size of the horizontal section of the antifouling cover body is gradually increased from top to bottom; the device is simple in structure and convenient to operate, pollutants can be shielded in the satellite-rocket separation process, and the requirement of the field of view of the digital sun sensor can be met.

Description

Technical Field

[0001] The invention belongs to the field of structural technology and relates to an anti-fouling outer cover of a digital sun sensor. Background Art

[0002] The digital sun sensor installed on the satellite is an important component of the satellite attitude and orbit control system. The digital sun sensor is an optical device, and the cleanliness of its lens surface has a great impact on the performance of the device. When there are no pollutants in the space path where the digital sun sensor is located during the satellite-rocket separation process, there is no need to consider the problem of rain flow pollution during installation, and it can be directly connected to the satellite structure through the mounting bracket. However, during the satellite-rocket separation process, if there are pollutants between the position of the digital sun sensor and the space path it passes through, the pollutants may adhere to the lens of the digital sun sensor, which will have a great impact on the imaging accuracy of the digital sun sensor. Summary of the invention

[0003] The technical problem solved by the present invention is: to overcome the shortcomings of the prior art and to propose an anti-fouling cover for a digital sun sensor, which has a simple structure and is easy to operate, and can not only shield pollutants during the satellite-rocket separation process, but also meet the requirements of the field of view of the digital sun sensor itself.

[0004] The solution of the present invention is:

[0005] A digital sun sensor anti-fouling cover comprises a digital sun sensor bracket, an anti-fouling cover body and a digital sun sensor;

[0006] Among them, the digital sun sensor bracket is vertically installed at the bottom of the external satellite structure plate; the digital sun sensor is installed in the middle position of the lower surface of the digital sun sensor bracket; the anti-fouling cover is installed at the circumferential outer edge of the lower surface of the digital sun sensor bracket to achieve circumferential shielding protection for the digital sun sensor.

[0007] In the above-mentioned anti-fouling outer cover of a digital sun sensor, the anti-fouling cover body is a gradually expanding cover body structure with an isosceles trapezoidal horizontal cross-section; the top of the anti-fouling cover body is connected to the digital sun sensor bracket, and the horizontal cross-sectional size of the top of the anti-fouling cover body is the smallest; the horizontal cross-sectional size of the anti-fouling cover body gradually increases from top to bottom.

[0008] In the above-mentioned anti-fouling outer cover of the digital sun sensor, the installation position of the anti-fouling cover body does not block the field of view of the digital sun sensor; the anti-fouling cover body protects the lens of the digital sun sensor from being contaminated by pollutants.

[0009] In the above-mentioned anti-fouling outer cover of the digital sun sensor, the surface of the anti-fouling cover is blackened to prevent stray light reflected by the anti-fouling cover from affecting the detection of the digital sun sensor.

[0010] In the above-mentioned anti-fouling outer cover for a digital sun sensor, the top of the anti-fouling cover is a horizontal U-shaped opening structure; the U-shaped opening structure is used to avoid the digital sun sensor when the anti-fouling cover is installed.

[0011] The above-mentioned anti-fouling outer cover of a digital sun sensor also includes 8 insulation pads and 4 fasteners; on both sides of the U-shaped opening structure at the top of the anti-fouling cover, each side is provided with 2 through holes, for a total of 4 through holes; each through hole corresponds to 2 insulation pads and 1 fastener; the 2 insulation pads are respectively attached to the upper and lower surfaces of the corresponding through holes; the fasteners pass through the insulation pads, the corresponding sides of the U-shaped opening structure at the top of the anti-fouling cover, the insulation pads and the digital sun sensor bracket from bottom to top.

[0012] In the above-mentioned anti-fouling outer cover of a digital sun sensor, the four through holes are respectively arranged at the four vertices of the isosceles trapezoidal cross-section at the top of the anti-fouling cover body.

[0013] In the above-mentioned anti-fouling outer cover of the digital sun sensor, the thermal insulation pad is made of M5H5 fiberglass material; the eight thermal insulation pads prevent the heat obtained by the anti-fouling cover due to sunlight from being transferred to the digital sun sensor.

[0014] In the above-mentioned anti-fouling outer cover of a digital sun sensor, the fastener is a titanium screw, and the surface is insulated.

[0015] In the above-mentioned anti-fouling outer cover of the digital sun sensor, the digital sun sensor bracket and the anti-fouling cover body are both made of aluminum alloy.

[0016] The beneficial effects of the present invention compared with the prior art are:

[0017] (1) The anti-fouling cover of the digital sun sensor of the present invention and the mounting interface of the digital sun sensor are U-shaped interfaces, and the centers of the four mounting screws are on the four vertices of the isosceles trapezoid, which has the function of preventing reverse installation;

[0018] (2) The anti-fouling cover of the digital sun sensor designed by the present invention is made of aluminum alloy to avoid stray light reflected on the surface and prevent the optical performance of the digital sun sensor from being affected;

[0019] (3) The anti-fouling cover of the present invention is blackened after processing, the edges of the bottom edge are strengthened, the weight is light, the mechanical properties are good, and it has the advantages of simple structure and easy installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the anti-fouling cover of the digital sun sensor of the present invention;

[0021] Figure 2 This is a schematic diagram of the anti-fouling cover structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the digital sun sensor bracket structure of the present invention. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the embodiments.

[0024] The present invention provides a digital sun sensor anti-fouling cover, which can effectively block pollutants while not blocking the field of view of the digital sun sensor itself, and has a simple structure and an easy installation structure. Currently, no description or report of similar technology in China has been found, and no similar information in China has been collected.

[0025] Digital sun sensor antifouling cover, such as Figure 1 As shown, it specifically includes a digital sun sensor bracket 1, an anti-fouling cover 2 and a digital sun sensor 5. The digital sun sensor bracket 1 is vertically installed at the bottom of the external satellite structure plate, such as Figure 3 The digital sun sensor 5 is installed in the middle of the lower surface of the digital sun sensor bracket 1; the anti-fouling cover 2 is installed at the circumferential outer edge of the lower surface of the digital sun sensor bracket 1 to achieve circumferential shielding protection for the digital sun sensor 5.

[0026] The anti-fouling cover 2 is the key design structure of the present invention. The anti-fouling cover 2 is a gradually expanding cover structure with an isosceles trapezoidal horizontal section. The top of the anti-fouling cover 2 is connected to the digital sun sensor bracket 1, and the horizontal section size of the top of the anti-fouling cover 2 is the smallest. The horizontal section size of the anti-fouling cover 2 gradually increases from top to bottom. The installation position of the anti-fouling cover 2 does not block the field of view of the digital sun sensor 5. The anti-fouling cover 2 protects the lens of the digital sun sensor 5 from being contaminated by pollutants.

[0027] The surface of the anti-fouling cover 2 is blackened to prevent stray light reflected by the anti-fouling cover 2 from affecting the detection of the digital sun sensor 5. The top of the anti-fouling cover 2 is a horizontal U-shaped opening structure; the U-shaped opening structure is used to avoid the digital sun sensor 5 when the anti-fouling cover 2 is installed. Figure 2 shown.

[0028] The anti-fouling outer cover of the digital sun sensor also includes 8 insulation pads 3 and 4 fasteners 4; on both sides of the U-shaped opening structure at the top of the anti-fouling cover body 2, 2 through holes are set on each side, and a total of 4 through holes; each through hole corresponds to 2 insulation pads 3 and 1 fastener 4; 2 insulation pads 3 are respectively attached to the upper and lower surfaces of the corresponding through holes; the fastener 4 passes through the insulation pad 3, the corresponding side of the U-shaped opening structure at the top of the anti-fouling cover body 2, the insulation pad 3 and the digital sun sensor bracket 1 from bottom to top.

[0029] The four through holes are respectively arranged at the four vertices of the isosceles trapezoidal cross section at the top of the anti-fouling cover 2. The heat insulation pad 3 is made of M5H5 fiberglass material; the eight heat insulation pads 3 block the heat of the anti-fouling cover 2 from being irradiated by sunlight from being transferred to the digital sun sensor 5.

[0030] The fastener 4 is a titanium screw, and the surface is insulated. The digital sun sensor bracket 1 and the anti-fouling cover 2 are made of aluminum alloy.

[0031] Example

[0032] In this embodiment, the specific parameters and mechanical response of a digital sun sensor anti-fouling cover 2 are:

[0033] The anti-fouling cover 2 of the digital sun sensor supported by the present invention weighs 162g, the weight of the assembly is 352g, the installation spacing between the anti-fouling cover 2 of the digital sun sensor and the digital sun sensor bracket 1 is 3mm, and the fundamental frequency of the assembly is: 1657.81Hz in the X direction, 263.28Hz in the Y direction, 1815.23Hz in the Z direction, and 1681.17Hz in torsion. The maximum Von Mi ses stress value under quasi-static load conditions is 51.5Mpa, which is much smaller than the yield limit of 260MPa of the material 2A12T4, and the maximum deformation displacement value under the identification level sinusoidal load conditions is 0.1mm, which is much smaller than the installation spacing of 3mm.

[0034] The anti-fouling cover 2 of the present invention has been actually installed on a satellite, the operation process is smooth, and the assembly has successfully passed various verification tests such as satellite mechanics. After installation, the on-orbit performance of the digital sun sensor 5 is significantly improved.

[0035] It can be seen that the anti-fouling cover 2 of the digital sun sensor of the present invention can achieve the above while taking into account the simple structure, light weight, easy installation, good mechanical response, and can meet the on-orbit requirements.

[0036] The anti-fouling cover of the digital sun sensor of the present invention and the installation interface of the digital sun sensor are U-shaped interfaces, and the centers of the four installation screws are on the four vertices of the isosceles trapezoid, which has the function of preventing reverse installation. The anti-fouling cover of the digital sun sensor designed by the present invention is made of aluminum alloy to avoid stray light reflected by the surface and prevent the optical performance of the digital sun sensor from being affected.

[0037] The anti-fouling cover body of the present invention is blackened after processing, the edges of the bottom edge are strengthened, the weight is light, the mechanical properties are good, and it has the advantages of simple structure and easy installation.

[0038] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A digital sun sensor anti-fouling cover, characterized in that: It comprises a digital sun sensor bracket (1), an anti-fouling cover (2) and a digital sun sensor (5); The digital sun sensor bracket (1) is vertically mounted on the bottom of the external satellite structure plate; the digital sun sensor (5) is mounted at the middle position of the lower surface of the digital sun sensor bracket (1); and the anti-fouling cover (2) is mounted at the circumferential outer edge of the lower surface of the digital sun sensor bracket (1) to achieve circumferential shielding protection for the digital sun sensor (5).

2. The anti-fouling cover of a digital sun sensor according to claim 1, characterized in that: The anti-fouling cover (2) is a gradually expanding cover structure with a horizontal cross section of an isosceles trapezoid; the top of the anti-fouling cover (2) is butted against the digital sun sensor bracket (1), and the horizontal cross section size of the top of the anti-fouling cover (2) is the smallest; the horizontal cross section size of the anti-fouling cover (2) gradually increases from top to bottom.

3. The anti-fouling cover of a digital sun sensor according to claim 2, characterized in that: The installation position of the anti-fouling cover (2) does not block the field of view of the digital sun sensor (5); the anti-fouling cover (2) protects the lens of the digital sun sensor (5) from being contaminated by pollutants.

4. The anti-fouling cover of a digital sun sensor according to claim 1, characterized in that: The surface of the anti-fouling cover (2) is subjected to a blackening treatment to prevent stray light reflected by the anti-fouling cover (2) from affecting the detection of the digital sun sensor (5).

5. The anti-fouling cover of a digital sun sensor according to claim 2, characterized in that: The top of the anti-fouling cover (2) is a horizontal U-shaped opening structure; the U-shaped opening structure is used to avoid the digital sun sensor (5) when the anti-fouling cover (2) is installed.

6. The anti-fouling cover of a digital sun sensor according to claim 5, characterized in that: It also includes 8 thermal insulation pads (3) and 4 fasteners (4); on both sides of the U-shaped opening structure at the top of the anti-fouling cover (2), each side is provided with 2 through holes, for a total of 4 through holes; each through hole corresponds to 2 thermal insulation pads (3) and 1 fastener (4); the 2 thermal insulation pads (3) are respectively attached to the upper and lower surfaces of the corresponding through holes; the fasteners (4) pass through the thermal insulation pads (3), the corresponding sides of the U-shaped opening structure at the top of the anti-fouling cover (2), the thermal insulation pads (3) and the digital sun sensor bracket (1) in sequence from bottom to top, and are connected.

7. The anti-fouling cover of a digital sun sensor according to claim 6, characterized in that: The four through holes are respectively arranged at the four vertices of the isosceles trapezoidal cross section at the top of the anti-fouling cover body (2).

8. The anti-fouling cover of a digital sun sensor according to claim 6, characterized in that: The heat insulation pad (3) is made of M5H5 glass fiber reinforced plastic material; the eight heat insulation pads (3) prevent the heat obtained by the anti-fouling cover (2) due to sunlight from being transmitted to the digital sun sensor (5).

9. The anti-fouling cover of a digital sun sensor according to claim 1, characterized in that: The fastener (4) is a titanium screw, and the surface is insulated.

10. The anti-fouling cover of a digital sun sensor according to claim 1, characterized in that: The digital sun sensor bracket (1) and the anti-fouling cover (2) are both made of aluminum alloy.

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