A small and medium-sized fixed-wing unmanned aerial vehicle net recovery device

Abstract

The application discloses a small and medium-sized fixed-wing unmanned aerial vehicle net-recovery device, and relates to the technical field of unmanned aerial vehicle recovery.The device comprises a telescopic column, an energy consumer, a base, an intercept net and a connecting piece.The intercept net is used for spatial interference with the unmanned aerial vehicle and for transmitting impact load;the rope in the connecting piece transmits the impact force to the energy consumer connected to the base at the end.The friction-type energy consumer is provided with a primary slider and a secondary slider, and can adaptively adjust the working tension and the energy consumption capacity according to different impact energies.The modular telescopic column is provided with a hanging ring for rope sliding or fixing at different height positions, and can be shrunk to the minimum volume during transportation.The modular base is provided with a sleeve pipe adaptedly connected to the bottom of the telescopic column, and a base hanging ring connectable with a quick-mounting lock catch.The device has the advantages of foldable modularization, energy-absorbing adaptive quantitative control, small impact damage to the machine body and fast system resetting, and is convenient for fast deployment in narrow and complex spaces in cities.

Description

TECHNICAL FIELD

[0001] The present application relates to unmanned aerial vehicle recovery technology, in particular to a small and medium-sized fixed-wing unmanned aerial vehicle net recovery device suitable for narrow and complex urban environment. BACKGROUND

[0002] With the rapid development of low-altitude economy, fixed-wing unmanned aerial vehicles are increasingly widely used in fields such as logistics distribution, urban patrol, and emergency response. However, the urban environment is limited in space, often lacking the runway or open space required for traditional unmanned aerial vehicle landing, which poses a severe challenge to the precise and safe recovery of fixed-wing unmanned aerial vehicles. Net recovery technology, as an effective solution, has attracted attention due to its low site requirements.

[0003] The existing fixed-wing unmanned aerial vehicle net recovery device usually has low modularization, is not flexible enough to deploy, and is difficult to adapt to the changing narrow space in the city. More importantly, many existing devices lack systematic buffer and energy absorption design, or their energy absorption mechanism is relatively single, and cannot effectively adapt to the huge impact energy brought by different models, different weights, and different landing speeds of unmanned aerial vehicles. This leads to excessive impact force during the recovery process, which easily causes irreversible damage to the unmanned aerial vehicle body structure and the precision instruments and equipment carried inside, increasing the operation and maintenance cost. In addition, when performing continuous recovery tasks for multiple unmanned aerial vehicles, the existing device is often tedious and time-consuming to reset, making it difficult to meet the needs of rapid and continuous operation.

[0004] Therefore, there is an urgent need in the art for a small and medium-sized fixed-wing unmanned aerial vehicle net recovery device that is highly modularized, easy to quickly deploy and transfer, has self-adaptive energy absorption capacity to effectively protect the unmanned aerial vehicle, and can achieve system rapid reset, in order to overcome the above-mentioned defects of the prior art and better serve low-altitude economic activities in urban environments. SUMMARY

[0005] In view of the above problems existing in the prior art, the present application aims to provide a small and medium-sized fixed-wing unmanned aerial vehicle net recovery device, which has the advantages of foldable modularization, energy absorption self-adaptive quantitative control, small impact damage to the body, and system rapid reset, and is particularly suitable for deployment in narrow urban spaces.

[0006] To solve the above technical problems, the technical solution proposed by the present application is:

[0007] The present application provides a small and medium-sized fixed-wing unmanned aerial vehicle net recovery device, comprising: a telescopic column, an energy absorber, a base, a connecting component, and a net;

[0008] The bottom of the telescopic column is connected with the base;

[0009] The connecting component comprises a plurality of ropes, some of which connect the telescopic column and the base;

[0010] Some of the ropes are connected to the base after being connected to the energy absorber through the boundary of the interception net, for absorbing kinetic energy generated by the unmanned aerial vehicle hitting the interception net.

[0011] Further, the telescopic column comprises a telescopic column body and a lifting ring; the telescopic column body is composed of a plurality of nested column bodies with different cross-sectional sizes; the lifting ring is arranged at different height positions of the telescopic column body.

[0012] Further, the telescopic column body is provided with a bolt hole on the side surface where the lifting ring is not arranged, for screwing in a stop bolt to fix the relative height between the segments of the telescopic column body.

[0013] Further, the energy absorber comprises a friction plate, a primary sliding block, a secondary sliding block, a pre-tightening bolt, an energy absorber rigging, an energy absorber lifting ring, a stop block and a rubber pad;

[0014] The middle part of the friction plate is provided with an axial groove;

[0015] The primary sliding block and the secondary sliding block are both composed of a plate member clamped on both sides of the friction plate and the pre-tightening bolt penetrating through the plate member, and the plate member on the side of the groove is provided with a protrusion matched with the groove and embedded in the groove;

[0016] The primary sliding block is arranged close to the position of the energy absorber lifting ring;

[0017] The secondary sliding block is arranged at the middle part of the friction plate;

[0018] The rubber pad is arranged on the side of the plate member of the secondary sliding block close to one side of the primary sliding block;

[0019] The stop block is arranged at one end of the friction plate away from the energy absorber lifting ring;

[0020] The energy absorber rigging is arranged around the friction plate and can freely slide through the secondary sliding block, and both ends of the energy absorber rigging are connected to the pre-tightening bolts on both sides of the primary sliding block.

[0021] Further, the primary working tension of the energy absorber F 1, secondary working tension F 2, primary energy absorption reserve E 1, secondary energy absorption reserve E 2, and the total energy absorption reserve of a single energy absorber E total The formula is as follows:

[0022] Primary working tension:F 1=4 T 1 μ 1

[0023] Secondary working tension: F 2=4( T 1+ T 2) μ 2

[0024] Primary energy dissipation reserve: E 1=4 T 1 μ 1 l 1

[0025] Secondary energy dissipation reserve: E 2=4( T 1+ T 2) μ 2 l 2

[0026] Total energy dissipation reserve: E total =4 T 1 μ 1 l 1+4( T 1+ T 2) μ 2 l 2

[0027] wherein, T 1 is the pre-tightening force of a single pre-tightening bolt in the primary slider, T 2 is the pre-tightening force of a single pre-tightening bolt in the secondary slider, l 1 is the distance from the primary slider to the secondary slider, l 2 is the distance from the secondary slider to the stopper, μ1 is the friction coefficient between the slider and the friction plate within the primary stroke l 1 range, μ2 is the friction coefficient between the slider and the friction plate within the secondary stroke l 2 range.

[0028] The sum of the total energy dissipation reserves of all the energy dissipaters is greater than or equal to the maximum kinetic energy at the moment when the unmanned aerial vehicle collides with the net.

[0029] Further, the rope diameter of the energy dissipater rigging is 2mm smaller than the thickness of the friction plate.

[0030] Further, the base includes a bottom plate, a front base lifting ring, a side base lifting ring, and a sleeve;

[0031] The sleeve is arranged on the bottom plate and used for connecting the bottom of the telescopic column.

[0032] The front base lifting ring and the side base lifting ring are arranged on the bottom plate and are connected with the telescopic column or the energy absorber through the connecting component.

[0033] Further, the bottom plate is in the shape of a quarter circle, and the sleeve is arranged near the center of the quarter circle.

[0034] Further, the front base lifting ring is connected with the rope through a lock buckle, and the rope is further connected with the lifting ring at the top of the telescopic column.

[0035] The side base lifting ring is connected with three ropes through the lock buckle.

[0036] The other end of the first rope is connected to the lifting ring at the top of the telescopic column.

[0037] The second and third ropes are connected with the energy absorber and sequentially pass through the lifting rings at the top and middle of the telescopic column and are finally connected with the upper and lower boundaries of the intercepting net.

[0038] Further, the bottom plate is provided with bolt holes near the front base lifting ring and the side base lifting ring, for fixing the base to the ground.

[0039] Further, one side of the intercepting net is an impact receiving side facing the impact of the UAV, and the other side is a buffer deformation side; the impact receiving side corresponds to the side where the front base lifting ring of the base is located.

[0040] Compared with the prior art, the present application has the following beneficial technical effects:

[0041] The present application has the following beneficial effects: 1. Through the modular telescopic column, base and standardized connecting component, the entire device can be quickly disassembled, folded and transported, greatly improving the deployment flexibility and efficiency, and adapting to urban narrow spaces. 2. The friction energy absorber with one or two sliding block structures is adopted, and a precise mechanical parameter calculation formula is provided, which can adaptively adjust the pre-tightening force according to the expected impact kinetic energy, realize quantitative control of the energy absorption capacity, ensure that appropriate buffering can be provided for different sizes of UAV impacts, and minimize damage to the UAV body. 3. The energy absorber is designed ingeniously, which can slow down the internal impact through rubber pads and realize adjustable performance and rapid preparation after reset through quantitatively controllable pre-tightening bolts, meeting the needs of continuous and rapid recovery operation. 4. The system structure is clear, the force transmission path is clear, and the reliability is high. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0043] Figure 1 It is a partial structure schematic diagram of a small and medium-sized fixed-wing unmanned aerial vehicle net-recovery device of the present application.

[0044] Figure 2 It is a right side telescopic column part assembly schematic of the present application. Figure 1

[0045] Figure 3 It is a left side telescopic column part assembly schematic of the present application. Figure 2

[0046] Figure 4 It is a base schematic diagram of the present application.

[0047] Figure 5 It is a energy dissipation device schematic diagram of the present application.

[0048] Figure 6 It is an energy dissipation device entity display mode schematic diagram of the present application.

[0049] Figure 7 It is a telescopic column schematic diagram of the present application.

[0050] Figure 8 It is a whole structure schematic diagram of a small and medium-sized fixed-wing unmanned aerial vehicle net-recovery device of the present application.

[0051] In the above drawings, the same reference signs are used to represent the same structures or components, and the structure or component names corresponding to the reference signs are as follows: 1-telescopic column, 2-energy dissipation device, 3-base, 4-connection component, 5-intercepting net, 11-telescopic column body, 12-suspender ring, 21-friction plate, 22-first-stage sliding block, 23-second-stage sliding block, 24-pre-tightening bolt, 25-energy dissipation device rigging, 26-energy dissipation device suspender ring, 27-stop block, 28-rubber pad, 31-bottom plate, 32-front base suspender ring, 33-side base suspender ring, 34-sleeve, 41-rope, 42-lock. DETAILED DESCRIPTION

[0052] ​​In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0053] Referring to Figure 1 and Figure 8 The small and medium-sized fixed-wing unmanned aerial vehicle netting recovery device of the present application comprises a telescopic column 1, an energy consumer 2, a base 3, a connecting component 4 and an intercepting net 5. The bottom of the telescopic column 1 is connected with the base 3, and the stable support of the whole device is realized through the base 3. The connecting component 4 comprises a plurality of ropes 41, which play a role in connecting various components in the device. Specifically, part of the ropes 41 connect the telescopic column 1 and the base 3 together, so as to enhance the overall structural stability of the device; another part of the ropes 41 first pass through the boundary of the intercepting net 5, and then are connected with the energy consumer 2 and then connected to the base 3. When the unmanned aerial vehicle hits the intercepting net 5, the energy consumer 2 can absorb the kinetic energy generated by the impact through its structural characteristics, thereby realizing the effective recovery of the unmanned aerial vehicle.

[0054] The telescopic column 1 comprises a telescopic column body 11 and a lifting ring 12. The telescopic column body 11 is composed of a plurality of column bodies with different cross-sectional sizes nested together. This nested structure enables the telescopic column body 11 to adjust the length according to actual needs. The lifting ring 12 is arranged at different height positions of the telescopic column body 11 and is used to connect components such as the ropes 41.

[0055] Bolt holes are arranged on the side of the telescopic column body 11 where the lifting ring 12 is not arranged. When the telescopic column body 11 is adjusted to the appropriate height, the stop bolt can be screwed into the bolt hole to fix the relative height between the segments of the telescopic column body 11, so as to ensure that the telescopic column 1 maintains a stable length during the working process.

[0056] The energy dissipation device 2 comprises a friction plate 21, a first sliding block 22, a second sliding block 23, a pre-tightening bolt 24, an energy dissipation device rigging 25, an energy dissipation device lifting ring 26, a stop block 27 and a rubber pad 28. The friction plate 21 is provided with a groove in the middle in the axial direction; the first sliding block 22 and the second sliding block 23 are both composed of a plate member clamped on both sides of the friction plate 21 and the pre-tightening bolt 24 penetrating through the plate member, and the plate member on the side of the groove is provided with a protrusion matching the groove and embedded in the groove; the first sliding block 22 is arranged at a position close to the energy dissipation device lifting ring 26, and the second sliding block 23 is arranged in the middle of the friction plate 21; the rubber pad 28 is arranged on the side of the plate member of the second sliding block 23 close to the first sliding block 22; the stop block 27 is arranged at one end of the friction plate 21 away from the energy dissipation device lifting ring 26; and the energy dissipation device rigging 25 is arranged around the friction plate 21 and can freely slide through the second sliding block 23, with both ends connected to the pre-tightening bolts 24 on both sides of the first sliding block 22.

[0057] The first working tension, the second working tension, the first energy dissipation reserve, the second energy dissipation reserve and the total energy dissipation reserve of a single energy dissipation device of the energy dissipation device 2 all have corresponding calculation methods, and the sum of the total energy dissipation reserves of all the energy dissipation devices 2 needs to be greater than or equal to the maximum kinetic energy at the moment when the unmanned aerial vehicle collides with the net.

[0058] The rope diameter of the energy dissipation device rigging 25 is 2mm smaller than the thickness of the friction plate 21, which helps to ensure smooth sliding of the energy dissipation device rigging 25 on the friction plate 21.

[0059] The base 3 comprises a bottom plate 31, a front base lifting ring 32, a side base lifting ring 33 and a sleeve 34, the sleeve 34 is arranged on the bottom plate 31 and used for connecting the bottom of the telescopic column 1; the front base lifting ring 32 and the side base lifting ring 33 are arranged on the bottom plate 31 and used for connecting the telescopic column 1 or the energy dissipation device 2 through the connecting component 4.

[0060] The bottom plate 31 is in the shape of a quarter circle, and the sleeve 34 is arranged at a position close to the center of the quarter circle, which is conducive to better supporting function of the base 3.

[0061] The front base lifting ring 32 is connected with the rope 41 through a lock buckle 42, and the rope 41 is further connected with the lifting ring 12 at the top of the telescopic column 1; the side base lifting ring 33 is connected with three ropes 41 through lock buckles 42, wherein one end of the first rope 41 is connected to the lifting ring 12 at the top of the telescopic column 1, the second and third ropes 41 are connected with the energy dissipation devices 2 and sequentially pass through the lifting rings 12 at the top and middle of the telescopic column 1, and finally connected with the upper and lower boundaries of the intercepting net 5.

[0062] The bottom plate 31 is provided with bolt holes near the front base lifting ring 32 and the side base lifting ring 33, which can be used to fix the base 3 to the ground through bolts, further enhancing the stability of the device.

[0063] One side of the intercept net 5 is the impact side facing the unmanned aerial vehicle impact, and the other side is the buffer deformation side, and the impact side corresponds to the side where the front base lifting ring 32 of the base 3 is located, which helps to more effectively receive the impact of the unmanned aerial vehicle and buffer.

[0064] The application will be further described below in combination with specific embodiments:

[0065] Please refer to Figures 2 to 6 The application provides a small and medium-sized fixed-wing unmanned aerial vehicle net impact recovery device, which comprises a telescopic column 1, an energy consumer 2, a base 3, a connecting component 4 and an intercept net 5. The telescopic column 1 comprises a telescopic column body 11 and a lifting ring 12; the energy consumer 2 comprises a friction plate 21, a first sliding block 22, a second sliding block 23, a pre-tightening bolt 24, an energy consumer rigging 25, an energy consumer lifting ring 26, a stop block 27 and a rubber pad 28; the base 3 comprises a base plate 31, a front base lifting ring 32, a side base lifting ring 33 and a sleeve 34; and the connecting component 4 comprises a rope 41 and a lock 42.

[0066] The telescopic column 1 is composed of three telescopic column bodies 11 with different cross-sectional sizes, and the lifting rings 12 are arranged at different height positions on three sides of the telescopic column body 11 for connection or passing of the rope 41, and bolt holes are arranged on the side of the telescopic column body 11 without the lifting ring 12 to control the height of the telescopic column 1; the telescopic column 1 can be contracted to the smallest volume during transportation or storage, and can be stretched and unfolded during use.

[0067] The middle part of the friction plate 21 in the energy consumer 2 is provided with a groove in the axial direction to guide the sliding blocks, the first sliding block 22 and the second sliding block 23 are both composed of plate pieces clamped on both sides of the friction plate 21 and the pre-tightening bolt 24 penetrating the plate pieces, wherein the plate piece on the groove side is provided with a protrusion matched with the groove and embedded in the groove. The tightening mode of the pre-tightening bolt 24 is preferably a torque controllable torque tool, and the pre-tightening force is determined according to the relationship between the tightening torque of the pre-tightening bolt 24 and the screw rod tension. The first sliding block 22 is arranged at the end close to the energy consumer lifting ring 26, and the second sliding block 23 is arranged at the middle part of the friction plate 21, when a small fixed-wing unmanned aerial vehicle with a certain range of kinetic energy impacts, only the first sliding block 22 is used for friction energy consumption, when a medium fixed-wing unmanned aerial vehicle with a certain range of kinetic energy impacts, the first sliding block 22 and the second sliding block 23 work together after collision; meanwhile, the side surface of the plate piece of the second sliding block 23 close to the side of the first sliding block 22 is provided with a rubber pad 28 to reduce the instantaneous pulse effect generated when the first sliding block 22 and the second sliding block 23 collide. The side of the friction plate 21 without the energy consumer lifting ring 26 is provided with a stop block 27 for end limiting of the sliding block, and the two rope ends of the energy consumer rigging 25 are connected to the pre-tightening bolt 24 of the first sliding block 22, and the rope diameter is preferably about 2mm smaller than the thickness of the friction plate 21.

[0068] The embodiment provides a method for calculating working tension of the energy consumer 2 and energy storage of the system (i.e. the tension of the rope 41 is determined, and the internal force of the system is controlled), the pre-tightening force of the two pre-tightening bolts 24 in the primary slider 22 is T 1, the pre-tightening force of the pre-tightening bolt 24 in the secondary slider 23 is T 2, the pre-tightening force is controlled by the torque when the pre-tightening bolt 24 is tightened, the distance between the primary slider 22 and the secondary slider 23 is the primary stroke l 1, the friction coefficient between the primary slider 22 and the friction plate 21 in the stroke range is μ 1, the distance between the secondary slider 23 and the stopper 27 is the secondary stroke l 2, the friction coefficient between the slider and the friction plate 21 in the stroke range is μ 2, the main control mechanical parameters of a single energy consumer 2 are:

[0069] Primary working tension: F 1=4 T 1 μ 1

[0070] Secondary working tension: F 2=4( T 1+ T 2) μ 2

[0071] Primary energy storage: E 1=4 T 1 μ 1 l 1

[0072] Secondary energy storage: E 2=4( T 1+ T 2) μ 2 l 2

[0073] Total energy storage: E total =4 T 1 μ 1 l 1+4( T 1+ T 2) μ 2 l 2

[0074] Wherein, the total energy storage E total multiplied by the total number of energy consumers 2 should not be less than the maximum kinetic energy of the unmanned aerial vehicle at the moment of net collision.

[0075] The bottom plate 31 is preferably a quarter circle, the sleeve 34 is arranged near the center of the circle, and the internal size of the sleeve 34 is preferably 1mm larger than the external size of the bottom of the telescopic column 1; for example Figure 2As shown, the front base lifting ring 32 is connected with a rope 41 through a shackle 42, and the other end of the rope 41 is connected with the lifting ring 12 on the top of the telescopic column 1 through a shackle 42 on the corresponding side of the front base lifting ring 32; as shown Figure 3 As shown, the side base lifting ring 33 is connected with three ropes 41 through shackles 42, and the other end of the first rope is connected with the lifting ring 12 on the top of the telescopic column 1 through a shackle 42 on the corresponding side of the side base lifting ring 33; the second and third ropes 41 are connected with the energy dissipation device 2 and pass through the remaining one of the lifting rings 12 on the top of the telescopic column 1 and the lifting ring 12 in the middle of the telescopic column 1, respectively, and then continue to pass through the upper and lower boundaries of the intercepting net 5.

[0076] The front base lifting ring 32 and the side base lifting ring 33 of the bottom plate 31 are provided with bolt holes near the lifting rings, and the base 3 is fixed on the ground with anchor points in a specific site through bolt connection; the side of the front base lifting ring 32 of the intercepting net 5 is the impact side, and the other side is the buffer deformation side, and a certain buffer space should be reserved on the buffer deformation side.

[0077] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A net recovery device for small and medium-sized fixed-wing unmanned aerial vehicles, characterized in that, The utility model relates to a telescopic column (1), energy consumer (2), base (3), connecting component (4) and intercept net (5) are included: Telescopic column (1) bottom with base (3) is connected; Connecting component (4) includes a plurality of ropes (41), part rope (41) connects telescopic column (1) with base (3) is connected; Part rope (41) passes through the boundary of intercept net (5) and is connected to base (3) after connecting with energy consumer (2), is used for absorbing the kinetic energy that unmanned aerial vehicle hits intercept net (5) generates; Energy consumer (2) includes friction plate (21), primary slider (22), secondary slider (23), pre-tightening bolt (24), energy consumer rigging (25), energy consumer lifting ring (26), stop block (27) and rubber pad (28); Friction plate (21) middle part is equipped with recess along the axial direction; Primary slider (22) and secondary slider (23) are all by the board piece clamped in both sides of friction plate (21) and pre-tightening bolt (24) through the board piece are formed, and the board piece located recess side is equipped with the protrusion and is embedded in recess with recess adaptation; Primary slider (22) is arranged at the position close to energy consumer lifting ring (26); Secondary slider (23) is arranged in the middle part of friction plate (21); Rubber pad (28) is arranged in the side of the board piece side of secondary slider (23) close to primary slider (22); Stop block (27) is arranged in the one end of friction plate (21) away from energy consumer lifting ring (26); Energy consumer rigging (25) is arranged around friction plate (21), and can freely slide through secondary slider (23), and both ends of energy consumer rigging (25) are connected on the pre-tightening bolt (24) of both sides of primary slider (22) respectively; Base (3) includes bottom plate (31), front base lifting ring (32), side base lifting ring (33) and sleeve pipe (34); Sleeve pipe (34) is arranged on bottom plate (31), is used for connecting the bottom of telescopic column (1); Front base lifting ring (32) and side base lifting ring (33) are arranged on bottom plate (31), are used for being connected with telescopic column (1) or energy consumer (2) through connecting component (4); Front base lifting ring (32) is connected with rope (41) through lock catch (42), and rope (41) is further connected with the lifting ring (12) of the top of telescopic column (1); Side base lifting ring (33) is connected with three ropes (41) through lock catch (42): Wherein, the other end of first rope (41) is connected to the lifting ring (12) of the top of telescopic column (1); Second and third rope (41) are connected with energy consumer (2) and pass through the lifting ring (12) of the top and middle of telescopic column (1) in proper order, and are finally connected with the upper and lower boundaries of intercept net (5). ​ 2. The net recovery device for small and medium-sized fixed-wing unmanned aerial vehicles according to claim 1, characterized in that, The telescopic column (1) comprises a telescopic column body (11) and a lifting ring (12); the telescopic column body (11) is composed of a plurality of nested column bodies with different cross-sectional sizes; the lifting ring (12) is arranged at different height positions of the telescopic column body (11).

3. The net recovery device for small and medium-sized fixed-wing unmanned aerial vehicles according to claim 2, characterized in that, The telescopic column body (11) is provided with a bolt hole on the side surface where the lifting ring (12) is not arranged, for screwing in a stop bolt to fix the relative height between the segments of the telescopic column body (11).

4. The net recovery device for small and medium-sized fixed-wing unmanned aerial vehicles according to claim 1, characterized in that, Primary working tension of the energy consumer (2) F 1. Secondary working tension F 2. Primary energy consumption reserve E 1. Secondary energy consumption reserve E 2. Total energy consumption reserve of the individual energy consumer E total is calculated according to the following formula: Primary working tension: F 1 = 4 T 1 μ 1 Secondary working pull: F 2 = 4 T 1 + T 2 ) μ 2 Primary energy reserve: E 1 = 4 T 1 μ 1 l 1 Secondary energy dissipation reserve: E 2=4( T 1+ T 2) μ 2 l 2 Total energy consumption reserve: E total =4 T 1 μ 1 l 1+4( T 1+ T 2) μ 2 l 2 wherein, T 1 is the pre-tightening force of a single pre-tightening bolt (24) in the primary slider (22), T 2 is the pre-tightening force of a single pre-tightening bolt (24) in the secondary slider (23), l 1 is the distance of the primary slider (22) to the secondary slider (23), l 2 is the distance of the secondary slider (23) to the stop (27), μ1 is the friction coefficient of the slider to the friction plate (21) in the primary stroke l 1, μ2 is the friction coefficient of the slider to the friction plate (21) in the secondary stroke l 2. The sum of the total energy consumption reserves of all the energy consumers (2) is greater than or equal to the maximum kinetic energy at the moment when the unmanned aerial vehicle collides with the net.

5. The net recovery device for small and medium-sized fixed-wing unmanned aerial vehicles according to claim 1, characterized in that, The rope diameter of the energy consumer rigging (25) is 2mm smaller than the thickness of the friction plate (21).

6. The net recovery device for small and medium-sized fixed-wing unmanned aerial vehicles according to claim 1, characterized in that, The bottom plate (31) is in the shape of a quarter circle, and the sleeve (34) is arranged near the center of the quarter circle.

7. The net recovery device for small and medium-sized fixed-wing unmanned aerial vehicles according to claim 1, characterized in that, The bottom plate (31) is provided with a bolt hole near the front base lifting ring (32) and the side base lifting ring (33), for fixing the base (3) to the ground.

8. The net recovery device for small and medium-sized fixed-wing unmanned aerial vehicles according to claim 1, characterized in that, One side of the intercepting net (5) is the impact side facing the unmanned aerial vehicle, and the other side is the buffer deformation side; the impact side corresponds to the side where the front base lifting ring (32) of the base (3) is located.

Images