Slow descent device for surveying unmanned aerial vehicle

Abstract

The slow descending device comprises an installation part used for being connected with the surveying unmanned aerial vehicle and a plurality of buffering parts arranged below the installation part, each buffering part comprises an outer cylinder, an inner cylinder and a supporting rod which are coaxially arranged, the upper end of each outer cylinder is connected with the installation part, and the upper end of each inner cylinder is located in the corresponding outer cylinder and is in sliding connection with the corresponding outer cylinder; a first spring is arranged in an inner cavity of the upper end of the outer cylinder along the axis of the outer cylinder, the upper end of the first spring is fixedly connected with the inner wall of the outer cylinder, the lower end of the first spring is fixedly connected with the upper end of the inner cylinder, the upper end of the supporting rod is located in the inner cylinder and slidably connected with the inner cylinder, and the lower end of the supporting rod downwards extends out of the inner cylinder. Locking mechanisms for locking the supporting rods and the inner barrels are arranged at the lower ends of the inner barrels, and when all the supporting rods make contact with the ground, the supporting rods and the inner barrels are locked and connected through the locking mechanisms on the inner barrels. Compared with the prior art, the unmanned aerial vehicle can stably take off and land on the uneven ground, and the phenomenon that the unmanned aerial vehicle rolls over due to the uneven ground is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, in particular to a slow descent device for a survey unmanned aerial vehicle. Background Art

[0002] A geological survey unmanned aerial vehicle is a tool for geological survey and research through unmanned aerial vehicle technology. It utilizes the flexibility and high-altitude navigation ability of the unmanned aerial vehicle, combined with various sensors and image acquisition devices, to achieve data collection and analysis of the surface, underground, and atmospheric environments. The geological survey unmanned aerial vehicle can carry a variety of sensors, such as high-resolution cameras, infrared thermal imagers, lidar, etc., for obtaining image data of different bands and resolutions, and can be used to produce high-precision maps, three-dimensional models, and digital elevation models, providing detailed information for geological and geomorphic analysis, soil water content, vegetation coverage, rock structure, etc. In order to facilitate the takeoff and landing of the unmanned aerial vehicle, a shock-absorbing bracket is provided on the bottom surface of the unmanned aerial vehicle to prevent the unmanned aerial vehicle from being damaged due to hard landing. Since the use scenarios of the geological survey unmanned aerial vehicle are mostly in the wild with complex geological environments, the ground where the geological survey unmanned aerial vehicle lands is often inclined or uneven. However, the existing shock-absorbing bracket of the unmanned aerial vehicle only plays a buffering role and cannot ensure that the geological survey unmanned aerial vehicle does not tilt and roll over when landing on an inclined or uneven ground, so the geological survey unmanned aerial vehicle is prone to roll over and be damaged when landing in the wild geological complex environment. Content of the Utility Model

[0003] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the utility model is: to provide a slow descent device for a survey unmanned aerial vehicle that can make the survey unmanned aerial vehicle land smoothly under the conditions of inclined or uneven ground in the wild to solve the problem of tilting and rolling over of the survey unmanned aerial vehicle during landing.

[0004] To solve the above technical problem, a technical solution adopted by the utility model is: to provide a slow descent device for a survey unmanned aerial vehicle, including a mounting member for connecting with the survey unmanned aerial vehicle and a plurality of buffer members arranged below the mounting member. The buffer member includes an outer cylinder, an inner cylinder, and a support rod coaxially arranged. The upper end of the outer cylinder is connected with the mounting member, the upper end of the inner cylinder is located inside the outer cylinder and is slidably connected with the outer cylinder, the lower end of the inner cylinder extends downward out of the outer cylinder, a first spring is arranged along the axis of the outer cylinder in the inner cavity at the upper end of the outer cylinder, the upper end of the first spring is fixedly connected with the inner wall of the outer cylinder, and the lower end of the first spring is fixedly connected with the upper end of the inner cylinder. The upper end of the support rod is located inside the inner cylinder and is slidably connected with the inner cylinder, the lower end of the support rod extends downward out of the inner cylinder, and a locking mechanism for locking the support rod and the inner cylinder is arranged at the lower end of the inner cylinder. When all the support rods are in contact with the ground, the locking mechanisms on each inner cylinder lock the support rod and the inner cylinder in a connected manner.

[0005] Further, the mounting member includes two strip-shaped mounting plates arranged in parallel. The two strip-shaped mounting plates are movably connected by a connecting member, and the buffer members are arranged below both ends of each strip-shaped mounting plate.

[0006] Further, a ring convex portion is provided at the lower end of the inner cylinder, and an annular groove is provided in the ring convex portion. The locking mechanism includes an expansion sleeve, an annular electromagnet, an annular armature arranged in the annular groove, and a microswitch arranged on the lower end surface of the support rod.

[0007] The annular groove is coaxially arranged with the inner cylinder. The expansion sleeve is sleeved outside the support rod and is coaxially arranged with the inner cylinder. There is a clearance between the expansion sleeve and the support rod. The lower end of the expansion sleeve is fixedly connected to the bottom inner wall of the annular groove. The annular armature is sleeved outside the lower end of the expansion sleeve with a clearance from the expansion sleeve. The annular electromagnet is fixedly connected to the top inner wall of the annular groove. Each annular electromagnet is connected in parallel and then electrically connected to a power supply arranged on the strip-shaped mounting plate. Each microswitch is connected in series and then connected in series to the circuit where the annular electromagnet is electrically connected to the power supply.

[0008] In the above solution, when the lower ends of all the support rods all touch the ground and all the serially connected microswitches are closed, the parallel-connected annular electromagnets can be connected to the power supply to be energized. After the annular electromagnet is energized, it adsorbs to move the annular armature upward to squeeze the outer wall of the expansion sleeve, so that the inner wall of the expansion sleeve presses tightly against the support rod. Under the friction force of the expansion sleeve, the support rod and the inner cylinder move synchronously. At this time, when the support rod is pressed down by the surveying and mapping unmanned aerial vehicle, the inner cylinder moves upward to squeeze the first spring, and the first spring deforms to buffer the landing of the unmanned aerial vehicle.

[0009] Further, the connecting member includes at least two telescopic rods arranged in parallel. The two ends of the telescopic rod are respectively fixedly connected to one strip-shaped mounting plate. The telescopic rod can be used to adjust the distance between the two strip-shaped mounting plates to adapt to the installation and use of surveying and mapping unmanned aerial vehicles of different sizes.

[0010] Further, the telescopic rod includes an outer tube and an inner tube arranged horizontally. The first end of the outer tube is fixedly connected to one strip-shaped mounting plate, the second end of the outer tube is open, the first end of the inner tube is inserted into the outer tube along the open end of the outer tube and is slidably connected to the outer tube, the second end of the inner tube is fixedly connected to the other strip-shaped mounting plate, and a locking member for locking the outer tube and the inner tube to each other is arranged on the outer tube.

[0011] Further, both the outer tube and the inner tube are square tubes.

[0012] Further, the locking member includes a locking screw.

[0013] Further, the expansion sleeve is a rubber sleeve.

[0014] Further, the lower end of the annular groove is open, and the lower end of the annular convex part is detachably connected to the lower cover plate to block the lower port of the annular groove. The lower end of the expansion sleeve is fixedly connected to the upper end surface of the lower cover plate. The arrangement of the lower cover plate facilitates the installation, disassembly and maintenance of the components in the annular groove.

[0015] Further, the lower cover plate is screwed to the lower end of the annular convex part.

[0016] In the present utility model, when the surveying UAV lands on an inclined or uneven ground, due to the uneven ground, all the support rods will not contact the ground simultaneously. At this time, the annular electromagnets on each inner cylinder do not work, enabling each support rod to slide freely within the inner cylinder. The support member that first contacts the ground will not generate a reaction support force to force the UAV to tilt. Therefore, the surveying UAV descends in a horizontal and stable state until when the surveying UAV descends to a position where all the support rods contact the ground, each microswitch is pressed and closed, causing the annular electromagnets on each inner cylinder to be energized and the support rods to be tightly connected to the inner cylinders. At this time, when the surveying UAV continues to descend, each inner cylinder is synchronously squeezed and slides within the outer cylinder, causing each first spring to be synchronously compressed to buffer the surveying UAV, ensuring that the surveying UAV lands horizontally without tipping over due to the uneven landing ground. When the surveying UAV stops and is stationary, the lengths of the support rods extending outside the inner cylinders are different, causing the surveying UAV to still remain in a horizontal state after stopping.

[0017] Compared with the prior art, this solution can enable the UAV to take off and land stably on uneven ground without causing the UAV to tip over due to the uneven ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0019] Figure 1 is a schematic structural diagram in the front view direction of the present utility model.

[0020] Figure 2 is a schematic structural diagram in the left view direction of the present utility model.

[0021] Figure 3 is a top view of the present utility model.

[0022] Figure 4 is Figure 1 the enlarged view of part A in

[0023] Figure 5 is a schematic structural diagram of the buffer member when the support rod contacts the ground.

[0024] Figure 6 isFigure 5 Enlarged view of part B

[0025] Figure 7 Schematic diagram of the internal structure of the annular convex part

[0026] Figure 8 Schematic diagram of the circuit connection of the present utility model

[0027] The meanings of the reference numerals in the drawings are as follows:

[0028] Strip-shaped mounting plate - 10

[0029] Outer cylinder - 21; inner cylinder - 22; annular convex part - 221; lower cover plate - 222; annular groove - 223; support rod 23; first spring - 24

[0030] Expansion sleeve - 301; annular electromagnet - 302; annular armature - 303; micro switch - 304

[0031] Expansion rod - 40; outer tube - 401; inner tube - 402; locking screw - 403

[0032] Power supply - 50 Specific embodiments

[0033] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0035] The present utility model will be further described below with reference to the drawings:

[0036] A descent control device for a surveying unmanned aerial vehicle according to the present utility model includes a mounting member for connecting with a surveying unmanned aerial vehicle and a plurality of buffer members provided below the mounting member.

[0037] Combined with Figures 1 - 3As shown, the mounting member includes two strip-shaped mounting plates 10 arranged in parallel. The two strip-shaped mounting plates 10 are movably connected by a connecting member. Below each end of each strip-shaped mounting plate 10, a buffer member is provided. The connecting member includes at least two telescopic rods 40 arranged in parallel. The two ends of each telescopic rod 40 are respectively fixedly connected to one mounting plate. The telescopic rod 40 can be used to adjust the distance between the two strip-shaped mounting plates 10 to adapt to the installation and use of survey drones of different sizes. The telescopic rod 40 includes an outer tube 401 and an inner tube 402 arranged horizontally. Both the outer tube 401 and the inner tube 402 are square tubes. The first end of the outer tube 401 is fixedly connected to one strip-shaped mounting plate 10, and the second end of the outer tube 401 is open. The first end of the inner tube 402 is inserted into the outer tube 401 along the open end of the outer tube 401 and is slidably connected to the outer tube 401. The second end of the inner tube 402 is fixedly connected to the other strip-shaped mounting plate 10. A locking screw 403 for locking the outer tube 401 and the inner tube 402 to each other is provided on the outer tube 401. The telescopic rod 40 can be used to adjust the distance between the two strip-shaped mounting plates 10 to adapt to the installation and use of survey drones of different sizes.

[0038] As Figure 1 shown, the buffer member includes an outer cylinder 21, an inner cylinder 22 and a support rod 23 arranged coaxially. The upper end of the outer cylinder 21 is fixedly connected to the mounting member. The upper end of the inner cylinder 22 is located inside the outer cylinder 21 and is slidably connected to the outer cylinder 21. The lower end of the inner cylinder 22 extends downward out of the outer cylinder 21. A first spring 24 is arranged along the axis of the upper end inner cavity of the outer cylinder 21. The upper end of the first spring 24 is fixedly connected to the inner wall of the outer cylinder 21, and the lower end of the first spring 24 is fixedly connected to the upper end of the inner cylinder 22. The upper end of the support rod 23 is located inside the inner cylinder 22 and is slidably connected to the inner cylinder 22. The lower end of the support rod 23 extends downward out of the inner cylinder 22. A locking mechanism for locking the support rod 23 and the inner cylinder 22 is provided at the lower end of the inner cylinder 22. When all the support rods 23 are in contact with the ground, the locking mechanisms on each inner cylinder 22 lock the support rods 23 and the inner cylinders 22 together.

[0039] Combined with Figure 1 、 Figure 4 、 Figure 7 shown, a ring convex portion 221 is provided at the lower end of the inner cylinder 22. An annular groove 223 is provided inside the ring convex portion 221. The lower end of the annular groove 223 is open. A lower cover plate 222 is provided at the lower end of the ring convex portion 221 to block the lower port of the annular groove 223. The lower cover plate 222 is screwed to the lower end of the ring convex portion 221. The support rod 23 is slidably connected to the lower cover plate 222.

[0040] The locking mechanism includes a expansion sleeve 301 disposed in the annular groove 223, an annular electromagnet 302, an annular armature 303, and a microswitch 304 disposed on the lower end surface of the support rod 23. The microswitch 304 is a normally open switch. The annular groove 223 is coaxially arranged with the inner cylinder 22. The expansion sleeve 301 is sleeved outside the support rod 23 and coaxially arranged with the inner cylinder 22. The expansion sleeve 301 is an elastic rubber sleeve. The upper end of the expansion sleeve 301 expands outward. The outer wall of the upper end of the expansion sleeve 301 is inclined upward away from the axis of the expansion sleeve 301. The expansion sleeve 301 is arranged with a gap from the support rod 23. The lower end of the expansion sleeve 301 is fixedly connected to the upper end surface of the lower cover plate 222. The annular armature 303 is sleeved outside the lower end of the expansion sleeve 301 and arranged with a gap from the expansion sleeve 301. The annular electromagnet 302 is fixedly connected to the top inner wall of the annular groove 223. As Figure 8 shown, each of the annular electromagnets 302 is connected in parallel and then electrically connected to a power source 50 (not shown) disposed on the strip-shaped mounting plate 10. Each of the microswitches 304 is connected in series and then connected in series to the circuit where the annular electromagnet 302 is electrically connected to the power source 50. The power source 50 can be a mobile power source or the power source of the surveying UAV, preferably the power source of the surveying UAV.

[0041] In the present utility model, when the surveying UAV lands on an inclined or uneven ground, due to the uneven ground, all the support rods 23 will not contact the ground simultaneously. Since at this time, not all of the microswitches 304 can be in a closed state, the annular electromagnets 302 on each inner cylinder 22 do not work, so that each support rod 23 can slide freely in the inner cylinder 22. The support member that first contacts the ground will not generate a reaction support force to force the UAV to tilt. Therefore, the surveying UAV descends horizontally and smoothly until when the surveying UAV descends to a position where all the support rods 23 contact the ground, each microswitch 304 is pressed and closed, so that the annular electromagnets 302 on each inner cylinder 22 are energized to adsorb the annular armature 303. As Figure 5 、 Figure 6 shown, under the magnetic attraction of the annular electromagnet 302, the annular armature 303 moves upward to squeeze the outer wall of the expansion sleeve 301. The outer wall of the expansion sleeve 301 is squeezed, and the upper end of the expansion sleeve 301 shrinks and deforms, so that the inner wall of the expansion sleeve 301 presses against the outer wall of the support rod 23, and further makes the support rod 23 and the inner cylinder 22 tightly abut and connect together. At this time, when the surveying UAV continues to descend, each inner cylinder 22 is synchronously squeezed and slides in the outer cylinder 21, so that each first spring 24 is synchronously compressed to buffer the surveying UAV, ensuring that the surveying UAV lands horizontally and will not tip over due to the uneven landing ground. When the surveying UAV stops and is stationary, the lengths of the support rods 23 extending outside the inner cylinder 22 are different, so that the surveying UAV still remains in a horizontal state after stopping.

[0042] Compared with the existing solutions that can only prevent the drone from making a hard landing, the present solution can enable the drone to take off and land smoothly on uneven ground without causing the drone to tip over due to the uneven ground.

[0043] The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present utility model should also be regarded as within the protection scope of the present utility model.

Claims

1. A descent device for a surveying drone, comprising a mounting member for connecting with the surveying drone and a plurality of buffer members arranged below the mounting member, characterized in that: The buffer member includes an outer cylinder, an inner cylinder and a support rod arranged coaxially. The upper end of the outer cylinder is connected to the mounting member. The upper end of the inner cylinder is located inside the outer cylinder and is slidably connected to the outer cylinder. The lower end of the inner cylinder extends downward out of the outer cylinder. A first spring is arranged along the axis of the outer cylinder in the inner cavity at the upper end of the outer cylinder. The upper end of the first spring is fixedly connected to the inner wall of the outer cylinder, and the lower end of the first spring is fixedly connected to the upper end of the inner cylinder. The upper end of the support rod is located inside the inner cylinder and is slidably connected to the inner cylinder. The lower end of the support rod extends downward out of the inner cylinder. A locking mechanism for locking the support rod and the inner cylinder is arranged at the lower end of the inner cylinder. When all the support rods are in contact with the ground, the locking mechanisms on each inner cylinder lock the support rod and the inner cylinder.

2. The descent device for a survey drone according to claim 1, wherein: The mounting member includes two parallel strip-shaped mounting plates, and the two strip-shaped mounting plates are movably connected by a connecting member. The buffer members are arranged below both ends of each strip-shaped mounting plate.

3. The descent device for a survey drone according to claim 2, characterized in that: A ring convex portion is arranged at the lower end of the inner cylinder, and an annular groove is arranged in the ring convex portion. The locking mechanism includes an expansion sleeve, an annular electromagnet, an annular armature and a microswitch arranged on the lower end face of the support rod, which are arranged in the annular groove. The annular groove is arranged coaxially with the inner cylinder. The expansion sleeve is sleeved outside the support rod and is arranged coaxially with the inner cylinder. There is a clearance between the expansion sleeve and the support rod. The lower end of the expansion sleeve is fixedly connected to the bottom inner wall of the annular groove. The annular armature is sleeved outside the lower end of the expansion sleeve with a clearance from the expansion sleeve. The annular electromagnet is fixedly connected to the top inner wall of the annular groove. All the annular electromagnets are connected in parallel and then electrically connected to a power supply arranged on the strip-shaped mounting plate. All the microswitches are connected in series and then connected in series to the circuit where the annular electromagnet is electrically connected to the power supply.

4. The descent device for a survey drone according to claim 2, characterized in that: The connecting member includes two parallel telescopic rods, and both ends of the telescopic rod are respectively fixedly connected to one of the strip-shaped mounting plates.

5. The descent device for a surveying drone according to claim 4, characterized in that: The telescopic rod includes a horizontally arranged outer tube and an inner tube. The first end of the outer tube is fixedly connected to one of the strip-shaped mounting plates, and the second end of the outer tube is open. The first end of the inner tube is inserted into the outer tube along the open end of the outer tube and is slidably connected to the outer tube. The second end of the inner tube is fixedly connected to the other strip-shaped mounting plate. A locking member for locking the outer tube and the inner tube to each other is arranged on the outer tube.

6. The descent device for a survey drone according to claim 5, characterized in that: Both the outer tube and the inner tube are square tubes.

7. The descent device for a survey drone according to claim 6, characterized in that: The locking member includes a locking screw.

8. The descent device for a survey drone according to claim 3, characterized in that: The expansion sleeve is a rubber sleeve.

9. The descent device for a surveying drone according to claim 3, characterized in that: The lower end of the annular groove is open, and the lower end of the ring convex portion is detachably connected with a lower cover plate to block the lower port of the annular groove. The lower end of the expansion sleeve is fixedly connected to the upper end face of the lower cover plate.

10. The descent device for a surveying UAV according to claim 9, characterized in that: The lower cover plate is screwed to the lower end of the ring convex portion.

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