A rib-type deployable antenna device

Abstract

The present invention provides a ribbed deployable antenna device, relating to the field of satellite-borne deployable antennas. The antenna device comprises a truss assembly and a reflective surface layer disposed on the truss assembly. The truss assembly comprises a plurality of sequentially connected truss folding units. The truss assembly is configured to transition from an extended state to a folded state and simultaneously drive the reflective surface layer from an extended state to a folded state. When the truss assembly is in the extended state, the truss folding units assume a parallelogram-shaped posture; when the truss assembly is in the folded state, the truss folding units assume a linear posture. The antenna device can be folded into a linear posture, effectively reducing the envelope size within the fairing during launch. When deployed, the reflective surface layer can be maximized, significantly improving the antenna device's folding ratio. The layer, made of a shape memory polymer composite material, can be folded and expanded upon heating. The device has the advantages of a simple structure, high reliability, a stable deployment process, and virtually no vibration or impact.

Description

Technical Field

[0001] The present invention relates to the field of satellite-borne deployable antennas, and in particular to a rib-type deployable antenna device. Background Art

[0002] Reflector antennas are the most commonly used antenna type on various satellite applications. They can serve as communications satellite antennas in the ultra-high frequency, microwave, and even millimeter wave bands, forming shaped area beams, spot beams, multi-beams, and scanning beams. Reflector antennas can be divided into four categories based on their structure: rigid reflector antennas, inflatable reflector antennas, mesh reflector antennas, and thin film reflector antennas.

[0003] The shortcomings of existing solutions are as follows: 1. Rigid reflector antennas have high precision, but the structure is heavy and the storage rate is low; 2. Inflatable deployable antennas have high storage rate and large diameter, but the surface shape accuracy is difficult to achieve high; 3. Thin film reflector antennas and mesh reflector antennas have excellent performance but complex structure. Summary of the Invention

[0004] The problem solved by the present invention is how to improve the folding and unfolding ratio, reliability and stability of the antenna device during the unfolding process.

[0005] To solve the above-mentioned problem, the present invention provides a rib-type deployable antenna device, comprising a truss assembly and a reflective surface layer provided on the truss assembly. The truss assembly includes a plurality of sequentially connected truss folding units. The truss assembly is configured to transition from an extended state to a folded state and simultaneously drive the reflective surface layer from an extended state to a folded state. When the truss assembly is in the extended state, the truss folding units assume a parallelogram-shaped posture. When the truss assembly is in the folded state, the truss folding units assume a linear posture.

[0006] The truss folding and unfolding unit includes a hinge extension unit, which is made of a shape memory polymer composite material and is used to be heated to drive the truss assembly to unfold or fold;

[0007] A heating component is used to heat the hinge extension unit.

[0008] Optionally, the truss folding unit includes a side rib, a middle rib and two hinge extension units. When the truss folding unit is in a parallelogram shape, the side rib and the middle rib are parallel to each other, and the two hinge extension units are parallel to each other. When the truss folding unit is in a linear shape, the side rib and the middle rib are in contact with and parallel to each other, and the two hinge extension units are accommodated between the side ribs and the middle rib.

[0009] Alternatively, the truss folding unit includes two middle ribs and two hinge extension units; when the truss folding unit is in a parallelogram posture, the two middle ribs are parallel to each other, and the two hinge extension units are parallel to each other; when the truss folding unit is in a linear posture, the two middle ribs are in contact and parallel to each other, and the two hinge extension units are accommodated between the side ribs and the middle ribs.

[0010] Optionally, each of the hinge extension units includes two extension rods and two sheet layers, one end of the two extension rods is respectively rotatably connected to the side ribs and the middle ribs or rotatably connected to the adjacent middle ribs, and the other ends of the two extension rods are connected together through the two sheet layers.

[0011] Optionally, the sheet layer is made of a shape memory polymer composite material, and the heating component is used to heat the sheet layer so as to cause the sheet layer to deform and drive the corresponding two extension rods to expand or retract.

[0012] Optionally, the extension rod includes a follower rod, and a hinge block and a connecting block are respectively provided at both ends of the follower rod, the hinge block is used to be rotatably connected to the side ribs or the middle ribs, and the connecting block is used to be fixedly connected to the sheet layer.

[0013] Optionally, the sheet layer is U-shaped, and the sheet layer includes an outer sheet and an inner sheet, the outer sheet includes a first deformation portion and a first mounting portion arranged at both ends of the first deformation portion, the inner sheet includes a second deformation portion and a second mounting portion arranged at both ends of the second deformation portion, and the sheet layer is used to gradually change from a bent posture to a straight posture after being heated.

[0014] Optionally, the side rib includes a first horizontal surface and a first vertical surface perpendicular to the first horizontal surface, the first horizontal surface and the first vertical surface form a parabolic structure, and the side rib is provided with a plurality of first connecting members, the first connecting member includes a first support seat provided on the side rib, the first support seat is used to be rotatably connected to the hinge block, and the first support seats on both sides are provided with a first end baffle, and the first support seat in the middle is provided with a first baffle, and the first end baffle and the first baffle are both fixedly connected to a side surface of the first support seat away from the center of the side rib.

[0015] Optionally, the middle rib includes a second vertical surface and a second horizontal surface perpendicular to the middle of the second vertical surface, the second horizontal surface and the second vertical surface form a parabolic structure, and the middle rib is provided with a plurality of second connecting members, the second connecting members include a second support seat provided on the middle rib, the second support seat is used to be rotatably connected to the hinge block, and the second support seats on both sides are provided with second end baffles, and the second support seat in the middle is provided with a second baffle, and the second end baffle and the second baffle are both fixedly connected to a side of the second support seat away from the center of the middle rib.

[0016] Optionally, the reflective surface layer includes a flexible metal mesh, and the reflective surface layer is fixedly connected to the side ribs and the middle ribs, and the reflective surface layer is in linear contact with the side ribs and the middle ribs.

[0017] Optionally, the heating component includes a heating film, which is adhered to the surface of the first deformation part and the surface of the second deformation part through high-temperature resistant polyimide double-sided tape or high-temperature resistant acrylic double-sided tape, and / or the heating film is directly composite-cured inside the first deformation part and inside the second deformation part.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] By applying the truss assembly of the present invention to a satellite, the truss folding and unfolding unit can be folded into a linear posture, and after the reflective surface layer is completely folded, the hinge extension unit will not occupy additional storage space and can be completely stored, without affecting the folding and unfolding ratio of the antenna device, and can effectively reduce the envelope size in the fairing during launch. After unfolding, the truss assembly can maximize the area of ​​the reflective surface layer, thereby greatly improving the folding and unfolding ratio of the antenna device; a heating component is used to drive the hinge extension unit made of a shape memory polymer composite material to fold and unfold, which has the advantages of simple structure, high reliability, stable unfolding process, and almost no vibration and impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a rib-type deployable antenna device according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic structural diagram of an unfolded truss assembly according to an embodiment of the present invention;

[0022] Figure 3 A structural schematic diagram of the truss assembly of an embodiment of the present invention after being unfolded from another perspective;

[0023] Figure 4 This is a schematic structural diagram of a truss assembly after folding according to an embodiment of the present invention;

[0024] Figure 5 A schematic structural diagram of a truss assembly according to an embodiment of the present invention after being folded from another perspective;

[0025] Figure 6 for Figure 5 A magnified view of the structure at point A;

[0026] Figure 7 This is a schematic structural diagram of the side ribs according to an embodiment of the present invention;

[0027] Figure 8 This is a schematic structural diagram of the middle rib according to an embodiment of the present invention;

[0028] Figure 9 This is a structural diagram of an embodiment of the present invention when the side ribs and the middle ribs are in a conflicting state;

[0029] Figure 10 Schematic diagram of the structure of the hinge extension unit according to an embodiment of the present invention;

[0030] Figure 11 A schematic structural diagram of an extension rod according to an embodiment of the present invention;

[0031] Figure 12 Schematic diagram of the structure of the outer sheet of an embodiment of the present invention;

[0032] Figure 13 Schematic diagram of the structure of the inner sheet according to an embodiment of the present invention;

[0033] Figure 14 This is a schematic structural diagram of an outer sheet or an inner sheet according to an embodiment of the present invention when the outer sheet or the inner sheet is in a straight position.

[0034] Description of reference numerals:

[0035] 1. Truss assembly; 11. Truss folding unit; 111. Side ribs; 1111. First horizontal surface; 1112. First vertical surface; 1113. First connector; 11131. First support base; 11132. First stopper; 1114. First end stopper; 112. Middle ribs; 1121. Second vertical surface; 1122. Second horizontal surface; 1123. Second end stopper; 1124. Second connector; 1124 1. Second baffle; 11242. Second support seat; 113. Hinge extension unit; 1131. Extension rod; 11311. Follower rod; 11312. Articulated block; 11313. Connecting block; 1132. Sheet layer; 11321. Outer sheet; 113211. First deformation portion; 113212. First mounting portion; 11322. Inner sheet; 113221. Second deformation portion; 113222. Second mounting portion; 2. Reflective surface layer. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] The Z-axis in the accompanying drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z-axis (that is, the direction of the arrow on the Z-axis) represents the top, and the reverse direction of the Z-axis represents the bottom; the X-axis in the accompanying drawings represents the horizontal direction and is designated as the left and right positions, and the positive direction of the X-axis represents the left side, and the reverse direction of the X-axis represents the right side; the Y-axis in the accompanying drawings represents the front and back positions, and the positive direction of the Y-axis represents the front side, and the reverse direction of the Y-axis represents the back side; it should also be noted that the aforementioned Z-axis, Y-axis and X-axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be practiced in an order other than that illustrated or described herein.

[0039] Combine Figure 1-Figure 5 As shown, an embodiment of the present invention provides a rib-type deployable antenna device (hereinafter referred to as the antenna device), including a truss assembly 1 and a reflective surface layer 2 provided on the truss assembly 1. The truss assembly 1 includes a plurality of truss folding units 11 connected in sequence. The truss assembly 1 is used to change from an expanded state to a collapsed state and simultaneously drive the reflective surface layer 2 to change from an expanded state to a collapsed state. When the truss assembly 1 is in the expanded state, the truss folding units 11 are in a parallelogram posture. When the truss assembly 1 is in the collapsed state, the truss folding units 11 are in a linear posture.

[0040] The truss folding and unfolding unit 11 includes a hinge extension unit 113, which is made of a shape memory polymer composite material. The hinge extension unit 113 is used to be heated to drive the truss assembly 1 to unfold or fold;

[0041] A heating component is used to heat the hinge extension unit 113 .

[0042] In this way, when the truss folding unit 11 is in a parallelogram posture, the truss assembly 1 is unfolded and the reflecting surface layer 2 is spread out; when the truss folding unit 11 is in a linear posture, the truss assembly 1 is closed and the reflecting surface layer 2 is retracted. Since the truss folding unit 11 can be folded into a linear posture, it only occupies a smaller storage space, which can effectively reduce the envelope size in the fairing during launch. When multiple truss folding units 11 are unfolded at the same time, the area of ​​the reflecting surface layer can be maximized, thereby greatly improving the folding ratio of the antenna device.

[0043] Specifically, connecting multiple truss folding units 11 in series means arranging adjacent truss folding units 11 side by side and end to end. The purpose of such arrangement is to enable multiple truss folding units 11 to synchronously transform from the expanded posture to the closed posture or from the closed posture to the expanded posture, so that the reflective surface layer 2 can be quickly spread out or folded. In one embodiment, multiple truss folding units 11 can be arranged in series on one side of the truss assembly 1, which can save a certain number of truss folding units 11, thereby saving materials and reducing production costs. However, it will affect the stability of the side of the truss assembly 1 without the truss folding unit 11 during expansion and closure, as well as the structural strength after expansion and closure, resulting in the side being unable to complete the expansion and closure actions synchronously with the side with the truss folding unit 11, and if the truss folding unit 11 on this side is damaged, it may affect the entire truss assembly 1 and cannot be expanded or closed, which may easily lead to the failure of the expansion or closure action of the reflective surface layer 2.

[0044] In this embodiment, multiple truss folding and unfolding units 11 can be arranged in parallel on both sides of the truss assembly 1, and multiple truss folding and unfolding units 11 on the same side of the truss assembly 1 are connected in series, so as to ensure that both sides of the truss assembly 1 can synchronously transform from the expanded posture to the closed posture or from the closed posture to the expanded posture, ensuring the stability of both sides of the truss assembly 1 during expansion and closure and the structural strength after expansion and closure, and also making the structural layout of the entire truss assembly 1 more reasonable, and the structural strength is also improved at the same time.

[0045] Optionally, combined Figure 1-Figure 3 As shown, the truss folding unit 11 includes a side rib 111, a middle rib 112, and two hinge extension units 113. When the truss folding unit 11 is in a parallelogram shape, the side rib 111 and the middle rib 112 are parallel to each other, and the two hinge extension units 113 are parallel to each other. When the truss folding unit 11 is in a linear shape, the side rib 111 and the middle rib 112 are in contact with and parallel to each other, and the two hinge extension units 113 are accommodated between the side rib 111 and the middle rib 112.

[0046] Alternatively, the truss folding unit 11 includes two middle ribs 112 and two hinge extension units 113; when the truss folding unit 11 is in a parallelogram posture, the two middle ribs 112 are parallel to each other, and the two hinge extension units 113 are parallel to each other; when the truss folding unit 11 is in a linear posture, the two middle ribs 112 are in contact and parallel to each other, and the two hinge extension units 113 are accommodated between the side ribs 111 and the middle ribs 112.

[0047] Specifically, combined Figure 2-Figure 3 As shown, the truss folding units 11 on the upper and lower sides are composed of side ribs 111, a middle rib 112 and two hinge extension units 113, while the truss folding unit 11 in the middle is composed of two middle ribs 112 and two hinge extension units 113. That is to say, when the distance between the side ribs 111 and the adjacent middle ribs 112 and between the adjacent middle ribs 112 is the largest, the truss folding unit 11 is in a rectangular posture, so that the truss assembly 1 is in a fully expanded state, and the spreading area of ​​the reflective surface layer 2 is the largest; when the side ribs 111 and the adjacent middle ribs 112 are in a fully expanded state, the reflective surface layer 2 is in a fully expanded state. When the adjacent middle ribs 112 are in contact with each other, the truss assembly 1 is in a completely closed state, and the reflective surface layer 2 is completely retracted. When all the side ribs 111 and the middle ribs 112 are closed together, all the hinge extension units 113 are stored between the side ribs 111 and the adjacent middle ribs 112 and between the adjacent middle ribs 112, so that the hinge extension unit 113 acts as the skeleton of the truss assembly 1 after the reflective surface layer 2 is fully unfolded. After the reflective surface layer 2 is completely retracted, the hinge extension unit 113 will not occupy additional storage space and can be completely stored, and will not affect the folding and unfolding ratio of the antenna device.

[0048] Optionally, combined Figures 1-6 As shown, each hinge extension unit 113 includes two extension rods 1131 and two layers 1132. One end of the two extension rods 1131 is respectively rotatably connected to the side ribs 111 and the middle ribs 112 or rotatably connected to the adjacent middle ribs 112, and the other ends of the two extension rods 1131 are connected together through the two layers 1132.

[0049] Specifically, the distribution position of the hinge extension unit 113 can be changed and set at different positions to obtain different folding methods. The size can also be increased in the radial or longitudinal direction or corresponding components can be added. The longitudinal size of the antenna device can be lengthened by increasing the number of extension rods 1131 in the hinge extension unit 113; the radial length of the antenna device can be increased by increasing the length of the side ribs 111 and the middle ribs 112, or the number of hinge extension units 113 can be increased or decreased without changing the size, so as to obtain different folding ratios.

[0050] Optionally, combined Figure 10-14 As shown, the sheet layer 1132 is made of a shape memory polymer composite material, and the heating component is used to heat the sheet layer 1132 to cause the sheet layer 1132 to deform and drive the corresponding two extension rods 1131 to expand or retract.

[0051] In this embodiment, the material selection for preparing the sheet 1132 of the shape memory polymer composite material can be diverse. The shape memory polymer composite material includes a matrix phase and a reinforcement phase. The matrix phase refers to the polymer material, which is selected according to the requirements of the use environment. Generally, epoxy or cyanate ester shape memory polymer composite materials can be selected. The glass transition temperature of epoxy polymer materials can be modified in the range of 80 to 180°C; and the glass transition temperature of cyanate ester polymers can be modified in the range of 180 to 200°C; the reinforcement phase is preferably continuous fiber, such as carbon fiber, glass fiber, aramid fiber, polyethylene fiber, etc. with good mechanical properties, or it can be chopped fiber or reinforcement particles, and a heating component is used to drive the sheet 1132 made of the shape memory polymer composite material to fold and unfold, which has the advantages of simple structure, high reliability, stable unfolding process, and almost no vibration and impact.

[0052] Optionally, combined Figure 10-11 As shown, the extension rod 1131 includes a follower rod 11311, and the two ends of the follower rod 11311 are respectively provided with a hinge block 11312 and a connecting block 11313, the hinge block 11312 is used to be rotatably connected to the side ribs 111 or the middle ribs 112, and the connecting block 11313 is used to be fixedly connected to the sheet layer 1132.

[0053] Specifically, the hinge block 11312 and the connecting block 11313 can be welded to the two ends of the extension rod 1131, or they can be integrally formed from the two ends of the extension rod 1131. The connecting block 11313 can be formed into a curved arc surface structure with raised upper and lower sides. Such a design can increase the contact area between the sheet layer 1132 and the connecting block 11313, thereby improving the firmness and stability of the connection between the two.

[0054] Optionally, combined Figure 12-14 As shown, the sheet layer 1132 is U-shaped, and the sheet layer 1132 includes an outer sheet 11321 and an inner sheet 11322. The outer sheet 11321 includes a first deformation portion 113211 and a first mounting portion 113212 arranged at both ends of the first deformation portion 113211. The inner sheet 11322 includes a second deformation portion 113221 and a second mounting portion 113222 arranged at both ends of the second deformation portion 113221. After being heated, the sheet layer 1132 is used to gradually change from a bent posture to a straight posture.

[0055] Specifically, the sheet layer 1132 can be directly formed by integrated fiber laying and curing, and the first mounting portion 113212 of the outer sheet 11321 and the second mounting portion 113222 of the inner sheet 11322 are formed into a shape matching the connecting block 11313 of the extension rod 1131, and can be pre-punched and connected by bolts. The sheet layer 1132 is heated by a heating component and bends and deforms into a folded state, such as a U-shape, when the temperature exceeds its glass transition temperature Tg. After the temperature drops, the sheet layer 1132 remains in the folded state, and the bending of the sheet layer 1132 realizes the folding of the devices at both ends; when the spacecraft enters space and runs to the preset orbit, the heating component heats the sheet layer 1132 again. When the temperature exceeds its glass transition temperature Tg, the sheet layer 1132 unfolds, driving the corresponding extension rod 1131 to unfold, thereby realizing the unfolding of the entire truss assembly 1.

[0056] Optionally, combined Figure 7 As shown, the side rib 111 includes a first horizontal surface 1111 and a first vertical surface 1112 perpendicular to the first horizontal surface 1111. The first horizontal surface 1111 and the first vertical surface 1112 form a parabolic structure. A plurality of first connecting members 1113 are provided on the side rib 111. The first connecting member 1113 includes a first support seat 11131 provided on the side rib 111. The first support seat 11131 is used to be rotatably connected to the hinge block 11312, and a first end baffle 1114 is provided on the first support seat 11131 on both sides, and a first baffle 11132 is provided on the first support seat 11131 in the middle, and the first end baffle 1114 and the first baffle 11132 are both fixedly connected to a side of the first support seat 11131 away from the center of the side rib 111.

[0057] In this embodiment, holes can be opened on the first support seat 11131 and the hinge block 11312, and the first support seat 11131 and the hinge block 11312 can be rotatably installed later by rotating parts such as a rotating shaft and a pin shaft. Thanks to the arrangement of the first end baffle 1114 and the first baffle 11132, the rotation direction of the extension rod 1131 can be limited, and the side ribs 111 with an L-shaped parabolic structure and the middle ribs 112 with a T-shaped parabolic structure can form a space for accommodating the hinge extension unit 113 after being closed, so that the hinge extension unit 113 faces inward after the truss assembly 1 is folded, thereby not taking up additional storage space, and the first end baffle 1114 and the first baffle 11132 can also play a role similar to that of a reinforcing rib, which can ensure the structural strength of the side ribs 111.

[0058] Optionally, combined Figure 8As shown, the middle rib 112 includes a second vertical surface 1121 and a second horizontal surface 1122 perpendicular to the middle of the second vertical surface 1121. The second horizontal surface 1122 and the second vertical surface 1121 form a parabolic structure. A plurality of second connecting members 1124 are provided on the middle rib 112. The second connecting members 1124 include a second support seat 11242 provided on the middle rib 112. The second support seat 11242 is used to be rotatably connected to the hinge block 11312, and a second end baffle 1123 is provided on the second support seat 11242 on both sides, and a second baffle 11241 is provided on the second support seat 11242 in the middle, and the second end baffle 1123 and the second baffle 11241 are both fixedly connected to a side of the second support seat 11242 away from the center of the middle rib 112.

[0059] In this embodiment, based on the above embodiment, the cross-sectional shape of the side ribs 111 can be L-shaped, and the cross-sectional shape of the middle ribs 112 can be T-shaped, so that it is easier to form a space for accommodating the hinge extension unit 113 between the side ribs 111 and the middle ribs 112 or between adjacent middle ribs 112. The cross-sectional shapes of the side ribs 111 and the middle ribs 112 are not limited to the above shapes. The cross-sectional shapes of the side ribs 111, the middle ribs 112 and the extension rod 1131 can be changed, such as an I-beam, a C-beam or a circular hollow rod, as long as it is a shape that can conveniently accommodate the hinge extension unit 113. Hollow holes can also be opened on the side ribs 111, the middle ribs 112 and the extension rod 1131. By changing the structure and size, the volume and weight of the antenna device can be reduced to achieve the characteristics of simple structure and light weight.

[0060] Specifically, holes can be opened in advance on the second support seat 11242 and the hinge block 11312, and then the second support seat 11242 and the hinge block 11312 can be rotated and assembled through rotating parts such as a rotating shaft and a pin shaft. Thanks to the arrangement of the second end baffle 1123 and the second baffle 11241, it can also play a similar role as a reinforcing rib, which can ensure the structural strength of the middle rib 112 and limit the rotation direction of the extension rod 1131. When the truss assembly 1 is folded, the extension rod 1131 can only rotate toward the center of the truss assembly 1. , and then the side ribs 111 and the middle ribs 112 can be gradually folded together. When the truss assembly 1 is unfolded, the extension rod 1131 is rotated to the maximum angle and is blocked by the second end baffle 1123 and the second baffle 11241. At this time, the truss assembly 1 is in a fully unfolded state, and the two T-shaped parabolic middle ribs 112 can form a space for accommodating the hinge extension unit 113 after closing, so that the hinge extension unit 113 faces inward after the truss assembly 1 is folded, and thus does not occupy additional storage space.

[0061] Optionally, combined Figure 1-Figure 3 As shown, the reflective surface layer 2 includes a flexible metal mesh and is fixedly connected to the side ribs 111 and the middle ribs 112 , and is in line contact with the side ribs 111 and the middle ribs 112 .

[0062] Specifically, the reflective surface layer 2 is in line contact with the first vertical surface 1112 of the side rib 111 and the second vertical surface 1121 of the middle rib 112. At this time, the hinge extension unit 113 is on the other side of the reflective surface layer 2. This design can effectively avoid motion interference during the folding and expansion process and stress concentration during the curling process of the reflective surface layer 2, which facilitates the adjustment and maintenance of the surface accuracy of the reflective surface layer 2.

[0063] In this embodiment, the reflecting surface layer 2 is a flexible metal mesh, so that it can match well with the side ribs 111 and the middle ribs 112, so that the antenna device can operate in space in a stable shape and high rigidity form, and the structural form of the reflecting surface layer 2 can be a parabola, a plane or a cylinder. The corresponding side ribs 111 and the middle ribs 112 are selected according to different structural forms, so that it can be flexibly selected according to the actual application scenario, and the material of the reflecting surface layer 2 can be changed, and different folding methods and folds can be designed to meet the requirements that when the antenna device is unfolded, the mesh surface of the reflecting surface layer 2 is flatly spread out, and when the antenna device is folded, the mesh surface of the reflecting surface layer 2 is naturally folded in half.

[0064] Optionally, combined Figure 10-14 As shown, the heating component includes a heating film, which is adhered to the surface of the first deformation part 113211 and the surface of the second deformation part 113221 through high-temperature resistant polyimide double-sided tape or high-temperature resistant acrylic double-sided tape, and / or the heating film is directly composite-cured inside the first deformation part 113211 and the second deformation part 113221.

[0065] Specifically, the heating component can heat the sheet 1132 by one or more combinations of external heating film, internally embedded resistance wire heating, external conductive adhesive heating, sunlight irradiation, ultraviolet light irradiation drive, magnetic field drive or microwave drive, wherein the heating component can be arranged on the outside of the sheet 1132 or on the inside of the sheet 1132; in this embodiment, the heating component heats the sheet 1132 by electric heating, and the pasting method is to use high-temperature resistant polyimide double-sided tape or high-temperature resistant acrylic double-sided tape, which improves the connection firmness between the heating film and the sheet 1132 and will not cause the heating film to fall off due to the increase in temperature.

[0066] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A rib-type deployable antenna device, characterized in that: The invention comprises a truss assembly (1) and a reflective surface layer (2) provided on the truss assembly (1), wherein the truss assembly (1) comprises a plurality of truss folding and unfolding units (11) connected in sequence, wherein the truss assembly (1) is used to change from an unfolded state to a folded state and synchronously drive the reflective surface layer (2) to change from an unfolded state to a folded state, and when the truss assembly (1) is in the unfolded state, the truss folding and unfolding unit (11) is in a parallelogram posture, and when the truss assembly (1) is in the folded state, the truss folding and unfolding unit (11) is in a linear posture; the truss folding and unfolding unit (111) comprises a hinge extension unit (113), wherein the hinge extension unit (113) is made of a shape memory polymer composite material, and wherein the hinge extension unit (113) is used to be heated to drive the truss assembly (1) to unfold or fold; and a heating assembly, wherein the heating assembly is used to heat the hinge extension unit (113); The truss folding unit (11) comprises a side rib (111), a middle rib (112) and two hinge extension units (113); when the truss folding unit (11) is in a parallelogram posture, the side rib (111) and the middle rib (112) are parallel to each other, and the two hinge extension units (113) are parallel to each other; when the truss folding unit (11) is in a linear posture, the side rib (111) and the middle rib (112) are in contact with and parallel to each other, and the two hinge extension units (113) are accommodated between the side rib (111) and the middle rib (112); Alternatively, the truss folding unit (11) includes two middle ribs (112) and two hinge extension units (113); when the truss folding unit (11) is in a parallelogram posture, the two middle ribs (112) are parallel to each other, and the two hinge extension units (113) are parallel to each other; when the truss folding unit (11) is in a linear posture, the two middle ribs (112) are in contact and parallel to each other, and the two hinge extension units (113) are accommodated between the side ribs (111) and the middle ribs (112).

2. The rib-type deployable antenna device according to claim 1, wherein: Each hinge extension unit (113) includes two extension rods (1131) and two sheet layers (1132), one end of the two extension rods (1131) is respectively rotatably connected to the side ribs (111) and the middle ribs (112) or rotatably connected to the adjacent middle ribs (112), and the other ends of the two extension rods (1131) are connected together through the two sheet layers (1132).

3. The rib-type deployable antenna device according to claim 2, wherein: The sheet layer (1132) is made of a shape memory polymer composite material, and the heating component is used to heat the sheet layer (1132) so as to cause the sheet layer (1132) to deform and drive the corresponding two extension rods (1131) to expand or close.

4. The rib-type deployable antenna device according to claim 2, wherein: The extension rod (1131) includes a follower rod (11311), and the two ends of the follower rod (11311) are respectively provided with a hinge block (11312) and a connecting block (11313), the hinge block (11312) is used to be rotatably connected to the side rib (111) or the middle rib (112), and the connecting block (11313) is used to be fixedly connected to the sheet layer (1132).

5. The rib-type deployable antenna device according to claim 3, wherein: The sheet layer (1132) is U-shaped, and the sheet layer (1132) includes an outer sheet (11321) and an inner sheet (11322), the outer sheet (11321) includes a first deformation portion (113211) and a first mounting portion (113212) arranged at both ends of the first deformation portion (113211), the inner sheet (11322) includes a second deformation portion (113221) and a second mounting portion (113222) arranged at both ends of the second deformation portion (113221), and the sheet layer (1132) is used to gradually change from a bent posture to an extended posture after being heated.

6. The rib-type deployable antenna device according to claim 4, wherein: The side rib (111) includes a first horizontal surface (1111) and a first vertical surface (1112) perpendicular to the first horizontal surface (1111), the first horizontal surface (1111) and the first vertical surface (1112) forming a parabolic structure, the side rib (111) is provided with a plurality of first connecting members (1113), the first connecting member (1113) includes a first supporting seat (11131) provided on the side rib (111), the first connecting member (1113) includes a first supporting seat (11131) provided on the side rib (111), and the first connecting member (1113) includes a first supporting seat (11131) provided on the side rib (111). A support seat (11131) is used to be rotatably connected to the hinge block (11312), and the first support seats (11131) on both sides are provided with first end baffles (1114), and the first support seat (11131) in the middle is provided with a first baffle (11132), and the first end baffle (1114) and the first baffle (11132) are both fixedly connected to a side surface of the first support seat (11131) away from the center of the side rib (111).

7. The rib-type deployable antenna device according to claim 4, wherein: The middle rib (112) includes a second vertical surface (1121) and a second horizontal surface (1122) perpendicular to the middle of the second vertical surface (1121), the second horizontal surface (1122) and the second vertical surface (1121) form a parabolic structure, the middle rib (112) is provided with a plurality of second connecting members (1124), the second connecting members (1124) include a second support seat (11242) provided on the middle rib (112), the The second support seat (11242) is used to be rotatably connected to the hinge block (11312), and the second support seats (11242) on both sides are provided with second end baffles (1123), and the second support seat (11242) in the middle is provided with a second baffle (11241), and the second end baffle (1123) and the second baffle (11241) are both fixedly connected to a side surface of the second support seat (11242) away from the center of the middle rib (112).

8. The rib-type deployable antenna device according to claim 4, wherein: The reflective surface layer (2) comprises a flexible metal mesh, and the reflective surface layer (2) is fixedly connected to the side ribs (111) and the middle ribs (112), and the reflective surface layer (2) is in line contact with the side ribs (111) and the middle ribs (112).

9. The rib-type deployable antenna device according to claim 5, characterized in that: The heating component includes a heating film, which is adhered to the surface of the first deformation part (113211) and the surface of the second deformation part (113221) through high-temperature resistant polyimide double-sided tape or high-temperature resistant acrylic double-sided tape, and / or adhered to the heating film and fixed inside the first deformation part (113211) and the second deformation part (113221), and / or the heating film is directly composite-cured inside the first deformation part (113211) and the second deformation part (113221).

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