A display system adapted to complex extraterrestrial terrain

Abstract

The present invention discloses a display system adapted to complex extraterrestrial terrain. The system is a regular tetrahedron, and the four faces of the regular tetrahedron are flexible skins. A cloth sleeve is sewn on the flexible skin, and a support rod is arranged inside the cloth sleeve. Before the regular tetrahedron is processed and formed: the flexible skin area of the equilateral triangle is evenly divided into four small equilateral triangle flexible skin pieces, namely the first flexible skin, the second flexible skin, the third flexible skin, and the fourth flexible skin. The present invention selects a polyhedron structure to ensure that there is always a surface facing the sky under any terrain; by using a flexible deployable structure, on the basis of superior volume and weight, it uses its own energy storage to achieve deployment and configuration stiffening, ensuring the prestress of the display fabric, and thus ensuring the flatness of the fabric to the greatest extent; the lightweight design of the entire system facilitates aerial delivery or ground placement or throwing placement by astronauts, and is easy to realize the arrangement of large-size display systems on extraterrestrial bodies.

Description

Technical Field

[0001] The present invention belongs to the technical field of aerospace space offensive and defensive reconnaissance and identification, and relates to a display system adapted to complex extraterrestrial terrain. Background Art

[0002] With the deepening of human exploration activities in space and the increasing intensification of potential military conflicts, under the reality that the research needs in the three major fields of space situation awareness, space attack, and space defense are becoming increasingly urgent, deploying a display system on an extraterrestrial celestial body can, on the one hand, demonstrate the advantages of aerospace technology to countries around the world and play a strategic deterrence role. On the other hand, through technology transplantation and changes to the displayed content, it can also directly assist space reconnaissance and target identification. For example, the lunar corner reflector is a kind of space display system, which provides the most effective means for scientists to study the density distribution of the moon and the trend of the moon moving away from the earth.

[0003] Regarding the display system, generally a rigid structure is currently adopted and deployed directly by astronauts. For example, the corner reflectors deployed by Apollo "11, 14, 15" and "Luna 17, 21" belong to this category. Their volume and weight are restricted. There is also a technical route, which is the flag display system of the US Apollo and China's Chang'e 5. The US inserts a flagpole after the astronaut selects a location, which has the defects of poor anti-tipping ability and being easily blown down by the plume. The flag display of China's Chang'e 5 is connected to the cabin body and cannot be deployed arbitrarily at a long distance. Summary of the Invention

[0004] In view of the actual demand for deploying a display system on complex extraterrestrial terrain, aiming at the defects that the traditional display system and deployment mechanism have complex schemes, and it is difficult for the volume, weight, and terrain adaptability to match the display target, this patent provides a solution for a display system adapted to complex extraterrestrial terrain. By using space deployable structures, flexible fabrics and other structural mechanism functions and configuration designs, the goal of easily deploying the display system and highly reliably displaying it on complex extraterrestrial terrain is achieved. The present invention avoids the defects of weight and volume, achieves arbitrary deployment on complex terrains, and ensures the effectiveness of the display function.

[0005] The present invention is implemented as follows:

[0006] A display system adapted to complex extraterrestrial terrain, characterized in that the system is a regular tetrahedron, and the four faces of the regular tetrahedron are flexible skins, several cloth sleeves are sewn on the corresponding flexible skins, and support rods are arranged in the cloth sleeves; before processing and forming the regular tetrahedron: the flexible skin area of the equilateral triangle is evenly divided into four small equilateral triangle flexible skin pieces, namely the first flexible skin, the second flexible skin, the third flexible skin, and the fourth flexible skin.

[0007] Sew a first cloth sleeve and a second cloth sleeve on the left side edge and the bottom edge of the first flexible skin respectively. The right side edge of the first flexible skin is the third edge; sew a sixth cloth sleeve and a fifth cloth sleeve on the right side edge and the bottom edge of the third flexible skin respectively. The left side edge of the third flexible skin is the second edge; sew a third cloth sleeve and a fourth cloth sleeve on the right side edge and the left side edge of the fourth flexible skin respectively. The bottom edge of the fourth flexible skin is the first edge;

[0008] When sewing the sixth cloth sleeve, the second cloth sleeve, and the fourth cloth sleeve, they are connected to three sides of the second flexible skin;

[0009] The sixth cloth sleeve, the second cloth sleeve, and the fourth cloth sleeve connect the first flexible skin, the second flexible skin, the third flexible skin, and the fourth flexible skin into one body.

[0010] Furthermore, the length dimension of the cloth sleeve is consistent with the length dimension of the edge of the flexible skin, and the width dimension of the cloth sleeve is consistent with the diameter of the support rod. These two dimensions are restricted by the dimensions of this device.

[0011] Furthermore, before the regular tetrahedron is processed and formed, with the second flexible skin as the bottom edge and the positions of the sixth cloth sleeve, the second cloth sleeve, and the fourth cloth sleeve as the crease lines, that is, valley lines; dock and sew the third edge with the third cloth sleeve, dock and sew the second edge with the first cloth sleeve, and dock and sew the first edge with the fifth cloth sleeve to form a regular tetrahedron; after sewing, insert the support rod into the corresponding cloth sleeve and then use sewing to seal it. In the area of the flexible skin after processing and forming, a certain distance (0.1 m) needs to be maintained from the edge to ensure that the display effect damaged caused by the sinking amount brought by the soft ground is avoided.

[0012] Furthermore, in order to reduce the processing stress and facilitate subsequent bending, the support rod adopts an assembly mode. It consists of left and right fixed seats and a middle super-elastic hinge, and the left and right fixed seats are the same. The support rod includes left and right fixed seats and a middle super-elastic hinge, and the left and right fixed seats are the same; the fixed seat includes an upper fixed block, a middle fixed block, and a lower fixed block. Among them, the upper super-elastic hinge is clamped by the upper fixed block and the middle fixed block, and the lower super-elastic hinge is clamped by the lower fixed block and the middle fixed block.

[0013] Furthermore, in order to ensure the fitting degree of clamping, the upper fixed block, the middle fixed block, and the lower fixed block are all designed to be conforming; their diameters are the same as the diameter of the super-elastic hinge; the parts in the left and right fixed seats are all connected by rivet riveting; a sewing connection block is also provided on the middle fixed block, and a sewing connection hole is left in it.

[0014] The beneficial effects of the present invention compared with the prior art are as follows:

[0015] The present invention selects a polyhedral structure to ensure that there is always a surface facing the sky under any terrain; by using a flexible deployable structure, on the basis of superior volume and weight, it realizes deployment and configuration stiffening by its own energy storage, ensuring the prestress of the display fabric, and thus maximizing the flatness of the fabric; the lightweight design of the entire system facilitates aerial delivery or ground placement or throw-and-place by astronauts, and is easy to realize the layout of large-size display systems on extraterrestrial celestial bodies.

[0016] The device of the present invention can be initially folded and deployed in orbit, and can realize the function of displaying the national flag or other markings under the complex terrains of extraterrestrial celestial bodies. In addition to meeting the requirements for the placement of the display system under the complex terrains of extraterrestrial celestial bodies, the present invention also has the possibility of expanding to other reconnaissance and identification fields.

[0017] The present invention is applicable to various space display systems in space. Based on the flexible deployable theory, it provides a display solution that can adapt to complex terrain environments. It can also be used in the field of military reconnaissance and detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the composition of a display system adapted to the complex terrains of extraterrestrial celestial bodies according to the present invention;

[0019] Figure 2 It is a schematic diagram of a flexible skin cut piece before processing and forming of a display system adapted to the complex terrains of extraterrestrial celestial bodies according to the present invention;

[0020] Figure 3 It is a schematic diagram of a support rod of a display system adapted to the complex terrains of extraterrestrial celestial bodies according to the present invention;

[0021] Figure 4 It is a schematic diagram of a fixed seat of a display system adapted to the complex terrains of extraterrestrial celestial bodies according to the present invention;

[0022] Figure 5 It is a schematic diagram of an intermediate fixing block of a display system adapted to the complex terrains of extraterrestrial celestial bodies according to the present invention;

[0023] Figure 6 It is a folding layout diagram of a display system adapted to the complex terrains of extraterrestrial celestial bodies according to the present invention;

[0024] Figure 7 It is a schematic diagram of the folding process of a display system adapted to the complex terrains of extraterrestrial celestial bodies according to the present invention;

[0025] Among them, 1 - sewing connection block, 2 - support rod, 3 - sewing connection hole, 4 - first cloth sleeve, 5 - third edge, 6 - third cloth sleeve, 7 - first edge, 8 - fifth cloth sleeve, 9 - second edge, 10 - sixth cloth sleeve, 11 - second cloth sleeve, 12 - fourth cloth sleeve, 13 - first flexible skin, 14 - second flexible skin, 15 - third flexible skin, 16 - fourth flexible skin, 17 - upper fixing block, 18 - rivet, 19 - upper super-elastic hinge, 20 - lower super-elastic hinge, 21 - lower fixing block, 22 - middle fixing block, 23 - sewing connection block, 24 - sewing connection hole, 25 - intersection point of the first edge, 26 - intersection point of the second edge, 27 - intersection point of the sixth cloth sleeve and the fourth cloth sleeve Detailed implementation manners

[0026] To make the objectives, technical solutions and effects of the present invention clearer and more definite, the following examples are given to further elaborate on the present invention in detail. It should be noted that the specific implementations described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] As Figure 1 shown, it is a composition diagram of the main components of a display system adapted to complex extraterrestrial terrain according to the present invention. The illustrated tetrahedron display system has an edge length of 2 meters. It consists of a flexible skin, a support rod 2, and cloth sleeves. The flexible skin and the support rod are connected through the cloth sleeves, that is, the support rod 2 is placed inside the cloth sleeve, and the cloth sleeve is sewn on the flexible skin.

[0028] The area enclosed by the thick solid line on the flexible skin is the effective display area, which needs to maintain a certain distance (0.1 m) from the edge to ensure that the display effect damaged by the sinking amount caused by the soft ground is avoided.

[0029] The basic cutting patterns of the flexible skin and the cloth sleeve are as Figure 2Before the regular tetrahedron is processed and formed: the equilateral triangle flexible skin area is evenly divided into four small equilateral triangle flexible skin pieces, namely the first flexible skin 13, the second flexible skin 14, the third flexible skin 15, and the fourth flexible skin 16; the first cloth cover 4 and the second cloth cover 11 are sewn on the left side and the bottom side of the first flexible skin 13, and the right side of the first flexible skin 13 is the third edge 5; the sixth cloth cover 10 and the fifth cloth cover 8 are sewn on the right side and the bottom side of the third flexible skin 15, and the third flexible skin 16 is sewn on the right side and the bottom side of the third flexible skin 15. The left side of the skin 15 is the second edge 9; the third cloth cover 6 and the fourth cloth cover 12 are sewn on the right side and the left side of the fourth flexible skin 16 respectively, and the bottom side of the fourth flexible skin 16 is the first edge 7; the sixth cloth cover 10, the second cloth cover 11, and the fourth cloth cover 12 are connected together with the three sides of the second flexible skin 14 during sewing; the sixth cloth cover 10, the second cloth cover 11, and the fourth cloth cover 12 connect the first flexible skin 13, the second flexible skin 14, the third flexible skin 15, and the fourth flexible skin 16 as a whole.

[0030] The length of the cloth cover is consistent with the length of the edge of the flexible skin, and the width of the cloth cover is consistent with the diameter of the support rod 2 (these two dimensions are constrained by the size of the device).

[0031] During processing and molding, Figure 2 The middle dotted line is the crease line (valley line), with the second flexible skin 14 as the bottom edge, and the positions of the sixth cloth cover 10, the second cloth cover 11, and the fourth cloth cover 12 as the crease line, i.e., the valley line; the second edge 9 is butt-stitched with the first cloth cover 4, and the first edge 7 is butt-stitched with the fifth cloth cover 8 to form a regular tetrahedron; after sewing, the support rod 2 is inserted into the cloth cover and sealed by sewing.

[0032] like Figures 3 to 5 The figure shows a schematic diagram of a support rod of a display system that can adapt to complex extraterrestrial terrain according to the present invention. In order to reduce processing stress and facilitate subsequent bending, an assembly mode is adopted. The support rod 2 adopts an assembly mode. The support rod 2 includes left and right fixing seats and a middle super-elastic hinge. The left and right fixing seats are the same; the fixing seats include an upper fixing block 17, a middle fixing block 22, and a lower fixing block 21, wherein the upper super-elastic hinge 19 is clamped by the upper fixing block 17 and the middle fixing block 22, and the lower super-elastic hinge 20 is clamped by the lower fixing block 21 and the middle fixing block 22. In order to ensure the fit of the clamping, the upper fixing block 17, the middle fixing block 22, and the lower fixing block 21 are all designed to be free-standing; their diameters are the same as the diameter of the super-elastic hinge;

[0033] All parts are connected by rivets 18, which reduces the number of connecting parts compared to screw and nut connection. In order to ensure that the support rod is relatively fixed in the cloth sleeve. Figure 5As shown, a sewing connection block 1 is further provided on the middle fixing block 22, with a sewing connection hole 3 left therein.

[0034] Figures 6 to 7 To show the system folding layout diagram and the folding process schematic diagram: After the initial assembly of the system, it reaches Figure 6 the state shown. First, the midpoint 23 of the second edge 9 where the first flexible skin 13 intersects the third flexible skin 15 is pressed and folded along the Figure 6 dotted arrow direction shown towards the intersection point 27 of the sixth cloth sleeve 10 and the fourth cloth sleeve 12. During the process, the third flexible skin 15 is folded along the dotted crease on the surface (the dotted intersection point is the centroid of the third flexible skin 15), and the first flexible skin 13 is folded along the double-dotted line crease on the surface. Thus, the fourth flexible skin 16 is attached to the second flexible skin 14 on the bottom along the fourth cloth sleeve 12. After the intersection point 25 of the first edge and the intersection point 26 of the second edge coincide, a one-dimensional surface structure is formed. After achieving the folding effect, as Figure 7 shown, it is folded from the intersection point 25 of the first edge and the intersection point 26 of the second edge towards the fourth cloth sleeve 12. After folding, a rope is used for fixation to ensure its folded state.

[0035] When it needs to be deployed in orbit, the constraint of the rope is released (the way of releasing the rope is not within the scope of patent protection). The self-energy storage of the support rod 2 is released, driving the flexible skin to unfold during this process. And during this process, the support rod and the second cloth sleeve 11 are fixed in a relative spatial position through the sewing connection hole on the middle fixing block. Therefore, the consistency of the final deployed state is ensured.

[0036] The design of the polyhedron configuration and the effective display area ensures that there is still a surface exposed within the visible area range under complex terrains.

[0037] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A display system adapted to complex extraterrestrial terrain, characterized in that The system is a regular tetrahedron, the four faces of the regular tetrahedron are flexible skins, a plurality of cloth sleeves are sewn on the corresponding flexible skins, and a support rod (2) is arranged inside the cloth sleeves; Before the regular tetrahedron is processed and formed: the equilateral triangle flexible skin area is evenly divided into four small equilateral triangle flexible skin pieces, namely a first flexible skin (13), a second flexible skin (14), a third flexible skin (15), and a fourth flexible skin (16); The first cloth cover (4) and the second cloth cover (11) are sewn on the left side and the bottom side of the first flexible skin (13), respectively, and the right side of the first flexible skin (13) is the third edge (5); the sixth cloth cover (10) and the fifth cloth cover (8) are sewn on the right side and the bottom side of the third flexible skin (15), respectively, and the left side of the third flexible skin (15) is the second edge (9); the third cloth cover (6) and the fourth cloth cover (12) are sewn on the right side and the left side of the fourth flexible skin (16), respectively, and the bottom side of the fourth flexible skin (16) is the first edge (7); The sixth cloth cover (10), the second cloth cover (11), and the fourth cloth cover (12) are connected together with three sides of the second flexible cover (14) during sewing; The sixth cloth sleeve (10), the second cloth sleeve (11), and the fourth cloth sleeve (12) connect the first flexible skin (13), the second flexible skin (14), the third flexible skin (15), and the fourth flexible skin (16) into one body; The support rod (2) adopts an assembly mode, wherein the support rod (2) comprises a left and a right fixing seat and a middle super-elastic hinge, wherein the left and right fixing seats are identical; the fixing seat comprises an upper fixing block (17), a middle fixing block (22), and a lower fixing block (21), wherein the upper super-elastic hinge (19) is clamped by the upper fixing block (17) and the middle fixing block (22), and the lower super-elastic hinge (20) is clamped by the lower fixing block (21) and the middle fixing block (22).

2. The display system adapted to complex extraterrestrial terrain according to claim 1, characterized in that, The length of the cloth sleeve is consistent with the length of the edge of the flexible skin, and the width of the cloth sleeve is consistent with the diameter of the support rod (2).

3. The display system adapted to complex extraterrestrial terrain according to claim 1, characterized in that, Before the regular tetrahedron is processed and formed, the second flexible skin (14) is used as the bottom edge, and the positions of the sixth cloth sleeve (10), the second cloth sleeve (11), and the fourth cloth sleeve (12) are used as fold lines, i.e., valley lines; the third edge (5) and the third cloth sleeve (6) are butt-jointed and sewn, the second edge (9) and the first cloth sleeve (4) are butt-jointed and sewn, and the first edge (7) and the fifth cloth sleeve (8) are butt-jointed and sewn, thereby forming a regular tetrahedron; after sewing, the support rod (2) is inserted into the corresponding cloth sleeve and then sealed by sewing.

4. The display system adapted to complex extraterrestrial terrain according to claim 1, characterized in that, The upper fixing block (17), the middle fixing block (22), and the lower fixing block (21) are all designed to be free-standing; their diameters are the same as the diameter of the super-elastic hinge; the parts in the left and right fixing seats are riveted together by rivets (18); and a sewing connection block (1) is also provided on the middle fixing block (22), in which a sewing connection hole (3) is left.

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