Unmanned aerial vehicle high-strength high-toughness composite pavement panel

Abstract

This invention discloses a high-strength, high-toughness composite runway panel for unmanned aerial vehicles (UAVs). The panel comprises a composite material body, including warp and weft threads. The warp threads are fiber-reinforced composite resin rods with a diameter of 1-5 mm; the weft threads are fiber-reinforced, antistatic, high-strength, high-toughness polyurethane-modified polyester fibers. Fiber / honeycomb reinforced composite material support frames are inserted into the gaps formed by the weaving of the warp and weft threads. The thickness and width of the support frames match the gaps. A matching insertion connection structure I is provided on one opposite side of the panel, and a matching insertion connection structure II is provided on the other opposite side, enabling rapid splicing of adjacent panel bodies in both length and width directions. This invention provides corresponding insertion connection structures on the four sides of the panel body for rapid splicing. The three-dimensional weaving structure of the warp and weft threads gives the runway panel a shape memory function; the panel body deforms under load and can quickly and automatically recover its original three-dimensional shape after unloading.

Description

Technical Field

[0001] This invention relates to the field of composite pavement technology, specifically to a high-strength and high-toughness composite pavement for unmanned aerial vehicles (UAVs). The pavement features ultra-lightweight and flexible connection as well as high load-bearing capacity, making it suitable for rapid installation and use under all-terrain conditions. Background Technology

[0002] While China has already explored and researched the rapid construction of runways, connecting roads, and parking aprons for fixed-wing aircraft and armed helicopters, the development of runways and parking aprons for unmanned aerial vehicles (UAVs) is currently lacking. In field environments, soft sand, mudflats, swamps, and shrubbery are common operating conditions for UAV airfields, where vehicles can easily become stuck in mud and swamps, making them impassable. Therefore, lightweight, high-strength composite material pavement panels are needed for rapid assembly of roads and aprons to ensure the normal passage or parking of vehicles. Thus, there is an urgent need to research a lightweight, high-load-bearing, and rapidly deployable UAV runway that can achieve rapid construction of airport taxiways and meet the requirements of field environments. Summary of the Invention

[0003] To address the aforementioned technical problems, enable rapid assembly and laying of UAV take-off and landing runways, improve the efficiency of runway construction, and meet the requirements of field environments, this invention provides a high-strength and high-toughness composite runway panel for UAVs.

[0004] The technical solution adopted is as follows:

[0005] A high-strength, high-toughness composite runway panel for unmanned aerial vehicles (UAVs) includes a composite material panel body. The panel body comprises warp and weft threads. The warp threads are fiber-reinforced resin-based composite material rods with a diameter of 1–5 mm, exhibiting a tensile strength greater than 500 MPa, a compressive strength greater than 300 MPa, and an elongation at break greater than 5%. The weft threads are fiber-reinforced, antistatic, high-strength, high-toughness polyurethane-modified polyester fibers, exhibiting a tensile strength greater than 450 MPa and an elongation at break greater than 8%. Fiber / honeycomb reinforced composite material support frames with a bending stiffness greater than 1 × 10⁻⁶ are inserted into the gaps formed by the weaving of the warp and weft threads. 7 N·mm 2 The thickness and width of the fiber / honeycomb reinforced composite material support frame are respectively matched with the gap formed; a matching plug-in connection structure I is provided on one opposite side of the main body of the plate, and a matching plug-in connection structure II is provided on the other opposite side. The plug-in connection structure I and the plug-in connection structure II are used for quick splicing of two adjacent main bodies of the plate in the length and width directions.

[0006] Preferably, the fiber-reinforced resin-based composite rod uses high-strength, high-toughness interpenetrating network resin as the matrix and high-strength fiber as the reinforcing material. It is made by a combination of multi-directional weaving and pultrusion processes. The double-layer three-dimensional weaving of the warp threads forms a ring structure, and the main body of the plate is made by interlacing and lengthening the weft threads. The main body of the plate is deformed by load loading, and can automatically restore its original three-dimensional shape after the load is unloaded.

[0007] Furthermore, the perimeter of the main body of the panel is sealed and fixed with a two-component thermosetting polyurethane adhesive or a one-component thermoplastic polyurethane adhesive.

[0008] Preferably, the plug-in connection structure I is arranged along the length direction of the main body of the plate, and the plug-in connection structure II is arranged along the width direction of the main body of the plate.

[0009] More preferably, the plug-in connection structure I includes a plurality of female slot buckles spaced apart along one side of the main body of the board and a plurality of male slot buckles spaced apart along the other side. Adjacent main bodies of the board are fixed by the female slot buckles and male slot buckles in a one-to-one plug-in connection, forming the main body of the board extending in the width direction.

[0010] Furthermore, the female plug is fixed to one side of the main body of the plate by a fixing connector, and the male plug is rotated and hinged to the other opposite side of the main body of the plate.

[0011] Preferably, the female slot buckle includes two clamping pieces, one end of which is clamped and fixed to the side of the main body of the board surface, forming an insertion gap and a slot between the two clamping pieces, the size of which is larger than the cross-sectional size of the insertion gap; one end of the male slot buckle is rotatably clamped to the other side of the main body of the board surface, and the other end is provided with a plug, the size of which is adapted to the insertion gap and slot formed by the female slot buckle.

[0012] Preferably, the plug-in connection structure II includes a screw ring I and a screw ring II with the same width as the main body of the plate. The screw ring I and the screw ring II are respectively fixed at both ends in the length direction of the main body of the plate. In the length direction of the main body of the plate, the screw rings I and the screw ring II on two adjacent main bodies of the plate form an interlocking plug-in connection, and a plug-in reinforcing rod with the same width as the main body of the plate is plugged in at the plug-in point. The plug-in reinforcing rod connects two adjacent main bodies of the plate together in the length direction.

[0013] The insertion reinforcement rod is a stainless steel rod or a fiber-reinforced composite material rod.

[0014] Furthermore, fixing holes are formed in the edge sealing area of ​​the main body of the panel, and steel male and female buckles are installed on the fixing holes for fixing the paving panel to the ground by steel chisels or expansion bolts.

[0015] The technical solution of the present invention has the following advantages:

[0016] A. The composite pavement panel used in this invention is made of fiber-reinforced resin-based composite material rods and fiber-reinforced antistatic high-strength polyester fibers through a three-dimensional weaving process. Fiber / honeycomb reinforced composite material support frames are inserted into the gaps formed after the warp and weft threads are woven, giving the panel a large rigidity and strong toughness. The three-dimensional weaving structure gives the pavement panel a shape memory function, allowing it to deform under load under the action of the weft threads, and quickly and automatically restore its original three-dimensional shape after the load is unloaded.

[0017] B. The present invention also provides plug-in connection structure I and plug-in connection structure II on opposite sides of the main body of the slab. Adjacent main bodies of the slab can be connected in the length direction by several spaced spiral plug-in connection structures II. Plug-in connection structures I are provided on both sides of the width direction of the main body of the slab. The two are connected in the width direction by a method similar to male and female buckles. Multiple main bodies of the slab can be connected by plug-in connection structures I and II and then rolled into rolls for mechanized and automated pavement paving, which greatly improves work efficiency. At the same time, the UAV pavement panels prepared in sections are conducive to loading, unloading and transportation.

[0018] C. In the plug-in connection structure I adopted in this invention, the female slot is fixedly connected to the main body of the plate, while the male slot is fixed to the main body of the plate in a rotating manner. It can rotate within the range of 0°-180°, which is more conducive to accurate positioning and installation connection.

[0019] D. The high-strength and high-toughness composite pavement panels used in this invention have flexible connections, enabling rapid large-area assembly; they are suitable for all terrains, meeting the needs of field operations; and they can be laid automatically by machinery, saving a lot of manpower and resources. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the ultra-lightweight and flexible high-load-bearing composite material runway panel structure for UAVs provided by the present invention;

[0022] Figure 2 This is a schematic diagram of the connection structure between the female slot buckle and the male slot buckle provided by the present invention;

[0023] Figure 3 This is a structural diagram of the main body of the board surface after the warp and weft threads are woven, as provided by the present invention.

[0024] The markings in the diagram are as follows:

[0025] 1-Main board surface, 1a-Warp, 1b-Weft, 1c-Fiber / honeycomb reinforced composite material support frame, 11-Fixing holes

[0026] 2-Plug-in connection structure I

[0027] 21-Slot female buckle, 211-Clamping piece

[0028] 22-Slot male, 221-Plug

[0029] 3-Plug-in connection structure II

[0030] 31-Threaded ring I, 32-Threaded ring II, 33-Plug-in reinforcing rod; 4-Rivet

[0031] a-Interlocking gap, b-Slot. Detailed Implementation

[0032] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figure 1 and Figure 3 As shown, this invention provides a high-strength, high-toughness composite runway panel for unmanned aerial vehicles (UAVs), comprising a composite material panel body 1. The panel body 1 is woven from warp and weft yarns. The warp yarn 1a is a fiber-reinforced resin-based composite material rod with a diameter of 1-5 mm, having a tensile strength greater than 500 MPa, a compressive strength greater than 300 MPa, and an elongation at break greater than 5%. The weft yarn 1b is a fiber-reinforced, antistatic, high-strength, high-toughness polyurethane-modified polyester fiber, having a tensile strength greater than 450 MPa and an elongation at break greater than 8%. Fiber / honeycomb reinforced composite material support frame 1c is inserted into the gaps formed by the three-dimensional weaving of the warp yarns 1a and weft yarns 1b. Figure 3 As shown, its bending stiffness is greater than 1×10. 7 N·mm 2The thickness and width of the fiber / honeycomb reinforced composite material support frame 1c are matched to the formed gaps; a matching plug-in connection structure I2 is provided on one opposite side of the main body 1, and a matching plug-in connection structure II3 is provided on the other opposite side. The plug-in connection structure I2 and plug-in connection structure II3 are used for rapid splicing of adjacent main bodies 1 in the length and width directions. Figure 1 As shown, the plug-in connection structure I2 in this invention is preferably arranged along the length direction of the main body 1 of the plate, and the plug-in connection structure II3 is arranged along the width direction of the main body 1 of the plate. Of course, this invention can also arrange the plug-in connection structure I along the width direction of the main body 1 of the plate, and the plug-in connection structure II along the length direction of the main body 1 of the plate, which can also achieve the purpose of this invention, and will not be elaborated here.

[0034] The fiber-reinforced resin matrix composite rod uses high-strength, high-toughness interpenetrating network resin as the resin matrix and high-strength fibers as the reinforcing material. It is manufactured using a combination of multi-directional weaving and pultrusion processes. The double-layer three-dimensional weaving of warp 1a forms a ring structure, and the main body 1 of the plate is formed by the interlacing and lengthening of weft 1b. Figure 3 As shown, the main body 1 of the slab deforms under load, and can automatically restore its original three-dimensional shape after the load is unloaded, which is beneficial for pavement installation and roll-up.

[0035] The perimeter of the woven board body 1 is preferably sealed and fixed with a two-component thermosetting polyurethane adhesive or a one-component thermoplastic polyurethane adhesive.

[0036] like Figure 2 As shown, the plug-in connection structure I2 includes multiple female slot buckles 21 spaced apart along one side of the length direction of the main body 1 and multiple male slot buckles 22 spaced apart along the other side of the length direction. After the female slot buckles 21 and male slot buckles 22 on two adjacent main bodies 1 are plugged in and fixed in a one-to-one correspondence, the two main bodies 1 are connected in series in the width direction, thus achieving a widening and extension, as shown. Figure 1 It can be seen that the female latches 21 and male latches 22 on both sides are positioned in a corresponding manner, and the spacing between them is also consistent.

[0037] like Figure 2As shown, for ease of installation, the female plug-in buckle 21 is fixed to one side of the main body 1 of the panel through a fixing connector, and the male plug-in buckle 22 is rotated and hinged to the other opposite side of the main body 1 of the panel. The specific structure is as follows: the female slot buckle 21 includes two clamping pieces 211. One end of the two clamping pieces 211 is clamped and fixed to the side of the main body 1 of the board surface. A plug-in gap a and a round hole-shaped slot b are formed between the two clamping pieces 211. The size of the slot b is larger than the cross-sectional size of the plug-in gap a. The slot b forms a straight line in the length direction. The two clamping pieces 211 are fixed by two rivets 4, thus giving the female slot buckle 21 a unique position. One end of the male slot buckle 22 is clamped to the other side of the main body 1 of the board surface and fixed by a rivet, thus allowing the male slot buckle to rotate 0° to 180° within the board surface to facilitate plug-in installation. The other end of the male slot buckle 22 is provided with a plug 221. The size of the plug 221 is adapted to the plug-in gap a and slot b formed by the female slot buckle 21. Both the female slot buckle 21 and the male slot buckle 22 are preferably made of fiber-reinforced composite material, which has a certain degree of toughness. When the plug of the male slot buckle is inserted into the slot of the female slot buckle, the two are fixedly connected, and the main body of the board is extended in the width direction.

[0038] The insertion connection structure II3 includes screw rings I31 and II32, which are the same width as the main body 1 of the plate. Screw rings I31 and II32 are fixed to the two ends of the main body 1 of the plate. In the length direction of the main body 1 of the plate, screw rings I31 and II32 on two adjacent main bodies 1 of the plate form an alternating insertion, and an insertion reinforcement rod 33 with the same width as the main body 1 of the plate is inserted at the insertion point. The insertion reinforcement rod 33 connects two adjacent main bodies 1 of the plate together in the length direction, so that the main body 1 of the plate is extended in the length direction. The screw rings I31 and II32 used in this invention have the same structure. After being interlocked, they form a tight spiral structure. When screw rings I31 and II32 are installed respectively, their spiral starting angles are staggered by a certain angle (for example, staggered by 60° or other angles) to facilitate the interlocking insertion. Then, the insertion reinforcement rod 33 passes through the hollow cavity formed by the spiral I31 and II32 and connects them together. The insertion reinforcement rod 33 of the present invention is preferably a stainless steel rod or a fiber-reinforced composite material rod. The length of the insertion reinforcement rod 33 can be the same as the width of the main slide panel, or it can be divided into multiple segments.

[0039] Meanwhile, the present invention also forms a fixing hole 11 in the edge sealing area on the side of the main body 1. The fixing hole 11 is fixed by metal male and female buckles. The fixing hole 11 can be fixed on a soft base by steel rod or on a hard surface by expansion bolt.

[0040] Any aspects not covered in this invention are applicable to existing technologies.

[0041] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A high-strength, high-toughness composite runway panel for unmanned aerial vehicles (UAVs), comprising a composite material panel body (1), characterized in that, The main body of the board (1) includes warp yarns (1a) and weft yarns (1b). The warp yarns (1a) are fiber-reinforced resin-based composite material rods with a diameter of 1-5 mm, a tensile strength greater than 500 MPa, a compressive strength greater than 300 MPa, and an elongation at break greater than 5%. The weft yarns (1b) are fiber-reinforced antistatic high-strength and high-toughness polyurethane-modified polyester fibers, with a tensile strength greater than 450 MPa and an elongation at break greater than 8%. Fiber / honeycomb reinforced composite material support frames (1c) are inserted into the gaps formed by the weaving of the warp yarns (1a) and weft yarns (1b), with a bending stiffness greater than 1×10⁻⁶. 7 N·mm 2 The thickness and width of the fiber / honeycomb reinforced composite material support frame (1c) are respectively matched with the gap formed; a matching plug-in connection structure I (2) is provided on one opposite side of the main body of the plate (1), and a matching plug-in connection structure II (3) is provided on the other opposite side. The plug-in connection structure I (2) and the plug-in connection structure II (3) are used to quickly splice two adjacent main bodies of the plate (1) in the length and width directions; the fiber reinforced resin matrix composite rod uses high-strength and high-toughness interpenetrating network resin as the matrix and high-strength fiber as the reinforcing material. It is made by combining multi-directional weaving and pultrusion processes. The double-layer three-dimensional weaving of the warp yarns forms a ring structure. The main body of the plate (1) is made by interlacing and lengthening the weft yarns. The main body of the plate (1) is deformed by load loading and can automatically restore its original three-dimensional shape after the load is unloaded. The plug-in connection structure I (2) is arranged along the length direction of the main body of the plate (1), and the plug-in connection structure II (3) is arranged along the width direction of the main body of the plate (1); The plug-in connection structure I (2) includes a plurality of female slot buckles (21) spaced apart along one side of the main body of the plate (1) and a plurality of male slot buckles (22) spaced apart along the other side. Two adjacent main bodies of the plate (1) are fixed by plugging in the female slot buckles (21) and the male slot buckles (22) in a one-to-one correspondence, so that the main body of the plate (1) extends in the width direction. The female slot buckle (21) is fixed to one side of the main body of the plate (1) by a fixing connector, and the male slot buckle (22) is rotated and hinged to the other opposite side of the main body of the plate (1). The female slot buckle (21) includes two clamping pieces (211). One end of the two clamping pieces (211) is clamped and fixed at the side of the main body of the plate (1). A plug-in gap (a) and a slot (b) are formed between the two clamping pieces (211). The size of the slot (b) is larger than the cross-sectional size of the plug-in gap (a). One end of the male slot buckle (22) is rotated and clamped at the other side of the main body of the plate (1). The other end of the male slot buckle is provided with a plug (221). The size of the plug (221) is adapted to the plug-in gap (a) and the slot (b) formed by the female slot buckle (21).

2. The high-strength, high-toughness composite runway panel for UAVs according to claim 1, characterized in that, The periphery of the main body of the panel (1) is fixed by sealing with a two-component thermosetting polyurethane adhesive or a one-component thermoplastic polyurethane adhesive.

3. The high-strength, high-toughness composite runway panel for UAVs according to claim 1, characterized in that, The plug-in connection structure II (3) includes a screw ring I (31) and a screw ring II (32) with the same width as the main body of the plate (1). The screw ring I (31) and the screw ring II (32) are respectively fixed at both ends of the main body of the plate (1) in the length direction. In the length direction of the main body of the plate (1), the screw ring I (31) and the screw ring II (32) on two adjacent main bodies of the plate (1) form an interlocking plug-in connection, and a plug-in reinforcing rod (33) with the same width as the main body of the plate (1) is plugged in at the plug-in point. The plug-in reinforcing rod (33) connects two adjacent main bodies of the plate (1) together in the length direction.

4. The high-strength, high-toughness composite runway panel for UAVs according to claim 3, characterized in that, The insertion reinforcement rod (33) is a stainless steel rod or a fiber-reinforced composite material rod.

5. The high-strength, high-toughness composite runway panel for unmanned aerial vehicles according to claim 1, characterized in that, The side sealing area of ​​the main body of the panel (1) is also formed with fixing holes (11), and steel male and female buckles are installed on the fixing holes (11) for fixing the paving panel to the ground by steel chisels or expansion bolts.

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