Unmanned aerial vehicle anti-falling experiment device

Abstract

An unmanned aerial vehicle anti-falling experiment device disclosed by the present invention comprises a base, lifting mechanisms, a lifting plate and a falling posture simulation mechanism, the lifting mechanisms are bilaterally symmetrically installed on the base, the lifting plate is installed between the two lifting mechanisms, and the falling posture simulation mechanism is installed in the middle of the lifting plate. The falling posture simulation mechanism comprises a mounting plate, an acceleration driving assembly and a rotation driving assembly. The invention relates to the technical field of unmanned aerial vehicle testing, and particularly provides an unmanned aerial vehicle anti-falling experiment device. The device fills up the blank of rotary falling simulation, is close to a real fault scene, and can restore the rotary falling posture of the unmanned aerial vehicle when the unmanned aerial vehicle is out of control through the rotary driving assembly compared with a traditional device which can only realize vertical free falling simulation.

Description

Technical Field

[0001] This invention relates to the field of drone testing technology, specifically to a drone crash resistance testing device. Background Technology

[0002] Drones have important applications in various fields such as aerial photography, agriculture, infrastructure monitoring, and emergency rescue, injecting new impetus into modern technological and industrial development. However, drones may encounter unexpected situations during flight, such as accidental collisions with buildings or trees, loss of data links, or sudden power outages. These can all cause drones to lose control and fall, resulting in damage to the fuselage and the scrapping of core components. By simulating various drop scenarios through crash testing devices, the structural strength and reliability of the drone's protective design can be verified in advance, helping to optimize the product's crash resistance, reduce failure losses in actual use, and improve operational safety.

[0003] Existing drone crash test devices can only simulate vertical free fall, but cannot simulate the rotational attitude of a drone when it is actually out of control, nor can they adjust the falling speed, so the test results have limited reference value.

[0004] To address this, we propose a drone crash resistance testing device. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a drone crash resistance test device.

[0006] The technical solution adopted by the present invention is as follows: The present invention provides a drone anti-fall test device, comprising a base, a lifting mechanism, a lifting plate, and a fall attitude simulation mechanism. The lifting mechanisms are symmetrically installed on the base, the lifting plate is installed between the two sets of lifting mechanisms, and the fall attitude simulation mechanism is installed in the middle of the lifting plate. The fall attitude simulation mechanism includes a mounting plate, an acceleration drive component, and a rotation drive component. The mounting plate passes through the middle of the lifting plate, the acceleration drive component is disposed on the mounting plate, and the rotation drive component is disposed on the acceleration drive component. The base is also provided with a fall collection groove, which is located below the fall attitude simulation mechanism.

[0007] Furthermore, the acceleration drive assembly includes a cylinder, which is fixedly disposed in the middle of the mounting plate. The output end of the cylinder is fixedly connected to a connecting plate, which is located below the mounting plate. The rotation drive assembly is disposed at the bottom of the connecting plate, and a guide rod is fixedly connected to the top of the connecting plate. The guide rod slides vertically through the mounting plate and is located around the cylinder.

[0008] Furthermore, the rotary drive assembly includes a motor, a housing, and a slider. The motor is fixedly mounted on the bottom of the connecting plate, and the housing is fixedly mounted on the output end of the motor. A rotating shaft is rotatably mounted between the front and rear inner walls in the middle of the housing. A cam is fixedly sleeved on the rotating shaft. A rotating handle is fixedly connected to one end of the rotating shaft extending towards the front of the housing. The slider is slidably adapted to the housing and is located on the left and right sides of the cam. A horizontal slide rod is fixedly connected to the side wall of the slider away from the cam. The other end of the horizontal slide rod slides through one inner wall of the housing. A spring is slidably sleeved on the horizontal slide rod. The spring abuts against the slider and one inner wall of the housing. A limit ball is fixedly connected to one end of the horizontal slide rod outside the housing. An elongated opening is provided at the bottom of the housing. A clamping plate is fixedly provided at the bottom of the slider, and the clamping plate slides through the elongated opening.

[0009] Furthermore, the acceleration drive assembly also includes a trigger unit, which is mounted on the mounting plate and located around the cylinder. The rotation drive assembly also includes a pulling unit located on the left and right sides of the housing, which is connected to the trigger unit and the limit ball.

[0010] Furthermore, the triggering unit includes an annular plate, a threaded cylinder, and a screw. The threaded cylinder rotates up and down through the mounting plate via a bearing, and the screw is threadedly connected inside the threaded cylinder. The annular plate is fixedly connected to the bottom end of the screw.

[0011] Furthermore, the triggering unit also includes an abutment plate and a pressure sensor. The abutment plate is located on one side of the screw and above the annular plate. A vertical slide rod is symmetrically fixed to the bottom of the abutment plate. The vertical slide rod slides through the annular plate and has a limit block fixed to its bottom end. A spring is slidably sleeved on the vertical slide rod and abuts between the abutment plate and the annular plate. The pressure sensor is fixedly installed on the annular plate. When the abutment plate moves down, it abuts against the pressure sensor. A bullseye bearing is also provided at the top of the abutment plate.

[0012] Furthermore, the pulling unit includes an annular plate II, a horizontal plate, a support rod, a connecting rod, a guide wheel, and a pull rope. The horizontal plate is fixed to one side wall of the housing. The connecting rod slides up and down through the horizontal plate. The bottom end of the connecting rod is fixed to a limit block II. One end of the support rod is fixed to the bottom of the horizontal plate. The guide wheel is rotatably mounted on the other end of the support rod and is positioned to the side of a displacement limit ball. One end of the pull rope is fixed to the limit ball. The other end of the pull rope passes around the guide wheel and is fixed to the limit block II. The annular plate II is fixed to the top end of the connecting rod. The screw is located inside the annular plate II. When the annular plate II moves down, it contacts the bullseye bearing at the top of the abutment plate.

[0013] Furthermore, the top circumference of the annular plate II is provided with a first actuating rod, and the bottom circumference of the threaded cylinder is provided with a second actuating rod. When the first actuating rod moves upward, it passes through the gap between two adjacent sets of second actuating rods.

[0014] Furthermore, a limiting block three is fixedly connected to the connecting rod, and the limiting block three is located above the horizontal plate. A spring three is slidably sleeved on the connecting rod, and the spring three abuts against the limiting block three and the horizontal plate.

[0015] Furthermore, the lifting mechanism includes two sets of symmetrically arranged columns. A lead screw assembly is vertically arranged inside the column. The upper end of the lead screw assembly is connected to a power device fixedly installed above the column. A slide is fixedly installed on the lead screw nut of the lead screw assembly. Rollers are installed on the left, right and rear sides of the slide. A guide rail is provided on the inner wall of the column to cooperate with the rollers. A load plate is fixed to the front side of the slide. One end of the lifting plate is fixedly connected to the load plate.

[0016] The beneficial effects achieved by the present invention using the above structure are as follows:

[0017] 1. This invention fills the gap in rotational fall simulation, closely resembling real-world failure scenarios. Compared to traditional devices that can only simulate vertical free fall, this device, through a rotational drive assembly (motor 1, housing, cam, and clamping plate working together), can recreate the rotational fall posture of a drone when it loses control. By adjusting the speed of motor 1 and the release timing of the clamping plate, the scenario can be replicated, solving the problem of the disconnect between traditional experiments and actual failure scenarios, making the experimental data more meaningful.

[0018] 2. This invention utilizes a cylinder in the acceleration drive component, which can adjust the cylinder's extension and retraction speed via a controller to drive the drone to fall at different speeds, thus recreating the falling situation from low speed to high speed, overcoming the deficiency of traditional devices that can only rely on gravity to achieve a single speed of descent.

[0019] 3. This invention utilizes a trigger unit (ring plate one, pressure sensor) and a pulling unit (ring plate two, pull rope, guide wheel) working in concert to achieve three automated release modes: height-triggered release, speed-triggered release, and rotation-triggered release. For example, when the drone descends to a preset height, ring plate two contacts the contact plate, squeezing the pressure sensor to trigger a signal. The controller then controls the clamping plate to release, enabling crash tests of the drone at different heights and drop speeds, as well as rotational descent tests at different rotational speeds. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a front view of the drop posture simulation mechanism in this invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the fall posture simulation mechanism in this invention;

[0024] Figure 4 This is a three-dimensional structural schematic diagram of the fall posture simulation mechanism in this invention from another perspective;

[0025] Figure 5 This is a three-dimensional structural diagram of the rotary drive component in this invention;

[0026] Figure 6 This is a three-dimensional structural schematic diagram of the rotary drive component in this invention from another perspective;

[0027] Figure 7 This is a cross-sectional view of the rotary drive assembly in this invention;

[0028] Figure 8 This is a three-dimensional structural diagram of the acceleration drive component in this invention;

[0029] Figure 9 This is a three-dimensional structural schematic diagram of the acceleration drive component from another perspective in this invention;

[0030] Figure 10 for Figure 8 Enlarged view of point A;

[0031] Figure 11 This is a three-dimensional structural diagram of the lifting mechanism in this invention;

[0032] Figure 12 This is a three-dimensional structural schematic diagram of the lifting mechanism in this invention from another perspective.

[0033] The components include: 1. Base; 2. Lifting mechanism; 3. Lifting plate; 4. Fall posture simulation mechanism; 5. Fall collection trough; 41. Mounting plate; 42. Acceleration drive assembly; 43. Rotation drive assembly; 421. Cylinder; 422. Connecting plate; 423. Guide rod; 424. Trigger unit; 4241. Annular plate one; 4242. Threaded cylinder; 4243. Screw; 4244. Contact plate; 4245. Pressure sensor; 4246. Vertical slide bar; 4247. Limit block one; 4248. Spring two; 4249. Bullseye bearing; 431. Pulling unit; 432. Motor one; 433. Housing; 434. Slider. 435. Rotating shaft; 436. Cam; 437. Horizontal slide bar; 438. Spring 1; 439. Limiting ball; 4310. Long slot; 4300. Clamping plate; 4311. Ring plate 2; 4312. Horizontal plate; 4313. Support rod; 4314. Connecting rod; 4315. Guide rope wheel; 4316. Pull rope; 4317. Limiting block 2; 4318. Actuating rod 1; 4319. Actuating rod 2; 110. Limiting block 3; 111. Spring 3; 201. Column; 202. Lead screw assembly; 203. Slide seat; 204. Carrying plate; 205. Servo motor; 206. Roller; 207. Guide rail. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] like Figures 1-4As shown, the present invention discloses a drone anti-fall test device, comprising a base 1, a lifting mechanism 2, a lifting plate 3, and a fall attitude simulation mechanism 4. The lifting mechanisms 2 are symmetrically mounted on the base 1, the lifting plate 3 is mounted between the two sets of lifting mechanisms 2, and the fall attitude simulation mechanism 4 is mounted in the middle of the lifting plate 3. The fall attitude simulation mechanism 4 includes a mounting plate 41, an acceleration drive component 42, and a rotation drive component 43. The mounting plate 41 passes through the middle of the lifting plate 3, the acceleration drive component 42 is mounted on the mounting plate 41, and the rotation drive component 43 is mounted on the acceleration drive component 42. The base 1 is also provided with a fall collection groove 5, which is located below the fall attitude simulation mechanism 4.

[0037] Working principle: The height of the drop attitude simulation mechanism 4 can be adjusted by the lifting mechanism 2. The drop attitude simulation mechanism 4 can simulate the state of a drone falling. The rotation drive component 43 simulates the rotational falling attitude of the drone when it loses control. The falling speed of the drone can be adjusted by the acceleration drive component 42, causing the drone to fall at different speeds. This restores the anti-fall test of the drone at different heights and under different failure states, further improving the realism of the test scenario. The bottom of the drop collection tank 5 can be covered with impact surfaces of different materials, such as cement board, steel plate, or different ground hardnesses in the real environment, such as grass and soil, so as to test the anti-fall performance of the drone on different ground surfaces.

[0038] like Figures 2-10 As shown, the acceleration drive assembly 42 includes a cylinder 421, which is fixedly disposed in the middle of the mounting plate 41. A connecting plate 422 is fixedly connected to the output end of the cylinder 421, and the connecting plate 422 is located below the mounting plate 41. The rotation drive assembly 43 is disposed at the bottom of the connecting plate 422, and a guide rod 423 is fixedly connected to the top of the connecting plate 422. The guide rod 423 slides vertically through the mounting plate 41 and is located around the cylinder 421.

[0039] By using the acceleration drive component 42 and the extension speed of the cylinder 421, the landing speed of the drone can be adjusted, thereby simulating the impact resistance of the drone hitting the ground at different speeds. After the lifting mechanism 2 transports the drone to the preset height, the controller sends an "extension command" to the cylinder 421. The output end of the cylinder 421 pushes the connecting plate 422 to move vertically downward. The connecting plate 422 drives the rotation drive component 43 at the bottom to move downward synchronously. During this process, the four guide rods 423 at the top of the connecting plate 422 slide vertically along the sliding holes of the mounting plate 41. The sliding holes are equipped with sliding bearings that slide with the guide rods 423 to reduce friction.

[0040] like Figures 2-10As shown, the rotary drive assembly 43 includes a motor 432, a housing 433, and a slider 434. The motor 432 is fixedly mounted on the bottom of the connecting plate 422. The housing 433 is fixedly mounted on the output end of the motor 432. A rotating shaft 435 is rotatably mounted between the front and rear inner walls of the housing 433. A cam 436 is fixedly sleeved on the rotating shaft 435. A rotating handle is fixedly connected to one end of the rotating shaft 435 extending towards the front of the housing 433. The slider 434 is slidably adapted to fit inside the housing 433 and is located on the left and right sides of the cam 436. A horizontal slide rod 437 is fixedly connected to the side wall away from the cam 436. The other end of the horizontal slide rod 437 slides through the inner wall of one side of the housing 433. A spring 438 is slidably sleeved on the horizontal slide rod 437. The spring 438 abuts against the slider 434 and the inner wall of one side of the housing 433. A limit ball 439 is fixedly connected to the end of the horizontal slide rod 437 outside the housing 433. A long slot 4310 is opened at the bottom of the housing 433. A clamping plate 4300 is fixedly provided at the bottom of the slider 434. The clamping plate 4300 slides through the long slot 4310.

[0041] The rotating drive component 43 is the core functional module for simulating the rotating fall scenario of a drone. By controlling the rotation speed and release timing of the drone, it recreates the spiral fall posture when the drone is out of control, thus overcoming the technical deficiency of traditional devices that can only simulate vertical falls. At the same time, manually turning the handle causes the cam 436 to rotate around its axis. The two protrusions of the cam 436 push the sliders 434 on both sides to slide outward along the inner wall of the housing 433. The sliders 434 compress the spring 438, which in turn causes the bottom clamping plate 4300 to separate along the long slot 4310 at the bottom of the housing 433. The drone is then placed between the two clamping plates 4300. Turning the handle in the opposite direction causes the spring 438 to push the slider 434 back to its original position under the action of the rebound force. The clamping plate 4300 then fits tightly against the drone body, completing the fixation.

[0042] like Figures 2-10 As shown, the acceleration drive assembly 42 also includes a trigger unit 424, which is located on the mounting plate 41 and around the cylinder 421. The rotation drive assembly 43 also includes a pulling unit 431 located on the left and right sides of the housing 433, which is connected to the trigger unit 424 and the limit ball 439.

[0043] like Figures 2-10 As shown, the triggering unit 424 includes an annular plate 4241, a threaded cylinder 4242, and a screw 4243. The threaded cylinder 4242 rotates up and down through the mounting plate 41 via a bearing. The screw 4243 is threadedly connected inside the threaded cylinder 4242. The annular plate 4241 is fixedly connected to the bottom end of the screw 4243.

[0044] like Figures 2-10As shown, the triggering unit 424 also includes a contact plate 4244 and a pressure sensor 4245. The contact plate 4244 is located on one side of the screw 4243 and above the annular plate 4241. A vertical slide rod 4246 is symmetrically fixed to the bottom of the contact plate 4244. The vertical slide rod 4246 slides through the annular plate 4241 and a limit block 4247 is fixed to its bottom end. A spring 4248 is slidably sleeved on the vertical slide rod 4246. The spring 4248 abuts between the contact plate 4244 and the annular plate 4241. The pressure sensor 4245 is fixedly installed on the annular plate 4241. When the contact plate 4244 moves down, it abuts against the pressure sensor 4245. A bullseye bearing 4249 is also provided at the top of the contact plate 4244.

[0045] like Figures 2-10 As shown, the pulling unit 431 includes an annular plate 4311, a horizontal plate 4312, a support rod 4313, a connecting rod 4314, a guide wheel 4315, and a pull rope 4316. The horizontal plate 4312 is fixed to one side wall of the housing 433. The connecting rod 4314 slides up and down through the horizontal plate 4312. The bottom end of the connecting rod 4314 is fixed to a limit block 4317. One end of the support rod 4313 is fixed to the bottom of the horizontal plate 4312. The guide wheel 4315 is rotatably mounted on the other end of the support rod 4313. One end of the pull rope 4316 is fixed to the limit ball 439 on one side of the displacement limiting ball 439. The other end of the pull rope 4316 passes over the guide rope wheel 4315 and is fixed to the limit block 4317. The annular plate 4311 is fixed to the top of the connecting rod 4314. The screw 4243 is located inside the annular plate 4311. When the annular plate 4311 moves down, it contacts the bullseye bearing 4249 on the top of the contact plate 4244, which can reduce the friction between the two and make contact when they rotate relative to each other.

[0046] The pulling unit 431 and the triggering unit 424 are the core linkage components in the UAV anti-crash test device for releasing the UAV. Through the coordination of mechanical force transmission and signal feedback, they ensure that the UAV stably detaches from the clamp at a preset altitude, speed, or rotation state. They are key components connecting the acceleration drive component 42 and the rotation drive component 43. The rotation of the threaded cylinder 4242 enables the screw 4243 to rise and fall, thereby enabling the annular plate 4241 to rise and fall, and in turn enabling the annular plate 4241 and the contact plate 4244 to rise and fall. By moving the contact plate 4244 upward, the annular plate can be driven upward. When the second ring plate 4311 moves upward, it can pull the clamping plate 4300 to release the drone, allowing the drone to be released and fall at a fixed height and rotation speed. When the first ring plate 4241 is fixed and the second ring plate 4311 moves downward, the second ring plate 4311 is blocked by the abutment plate 4244, slowing down its downward speed, while the downward speed of the box 433 remains unchanged. At this time, the second ring plate 4311 and the box 433 will separate, and the clamping plate 4300 will be separated from the drone by the pull rope 4316, which can increase the drone's falling speed and make it fall.

[0047] like Figures 2-10 As shown, the top circumference of the annular plate 4311 has a first actuating rod 4318, and the bottom circumference of the threaded cylinder 4242 has a second actuating rod 4319. When the first actuating rod 4318 moves upward, it passes through the gap between two adjacent sets of second actuating rods 4319.

[0048] like Figures 2-10 As shown, a limiting block 3 110 is also fixedly connected to the connecting rod 4314, and the limiting block 3 110 is located above the horizontal plate 4312. A spring 3 111 is slidably sleeved on the connecting rod 4314, and the spring 3 111 abuts against the limiting block 3 110 and the horizontal plate 4312.

[0049] By cooperating with the first actuating lever 4318 and the second actuating lever 4319, the threaded cylinder 4242 can rotate together, thereby causing the screw 4243 to rise and fall together. Through meshing transmission, the rotational motion of the drone is converted into the height adjustment power of the trigger unit 424, ensuring the release of the drone during low-speed rotational descent experiments. It should also be noted that the top of the first actuating lever 4318 is curved, allowing it to smoothly insert into the gap between the second actuating lever 4319. Because the first actuating lever 4318 is... During rotation, the gap between the two actuating rods 4319 is inserted. When the actuating rod 4318 is not aligned with the gap between the two actuating rods 4319, it will cause the actuating rod 4318 to move down, which in turn will cause the connecting rod 4314 to move down, and the limiting block 110 will squeeze the spring 111 until the actuating rod 4318 is aligned with the gap between the two actuating rods 4319. At this time, under the rebound action of the spring 111, the actuating rod 4318 is inserted into the gap between the two actuating rods 4319.

[0050] like Figures 11-12 As shown, the lifting mechanism 2 includes two sets of symmetrically arranged columns 201. A lead screw assembly 202 is vertically arranged inside the column 201. The upper end of the lead screw assembly 202 is connected to a power device fixedly installed above the column 201. A slide 203 is fixedly installed on the lead screw nut of the lead screw assembly 202. Rollers 206 are installed on the left, right and rear sides of the slide 203. A guide rail 207 is provided on the inner wall of the column 201 to roll with the rollers 206. A load plate 204 is fixed to the front side of the slide 203. One end of the lifting plate 3 is fixedly connected to the load plate 204.

[0051] The lifting mechanism 2 allows for adjustment of the drone's descent height. The column 201 is a hollow column with its opening facing the lifting plate 3. The upper and lower ends of the lead screw assembly 202 are rotatably mounted within the cavity of the column 201 via bearings. The controller simultaneously drives the lead screw assembly 202 through the power units on both sides, thus raising and lowering the lifting plate 3. The power units include a servo motor 205 and a belt drive assembly. The controller sends a start signal to the servo motor 205 according to a preset height command. The servo motor 205 drives the drive pulley on the output shaft to rotate synchronously. The drive pulley transmits rotational power through the meshing of the synchronous belt. The driven pulley is fastened to the top of the lead screw on the lead screw assembly 202 and rotates synchronously with the pulley. The lead screw rotates stably under the constraint of the support bearings at both ends. The lead screw nut on the lead screw assembly 202 engages with the lead screw through rolling ball joints. When the lead screw rotates, the nut moves linearly along the lead screw axis under the action of the thread helix angle. The lead screw nut is rigidly connected to the slide block 203 by bolts. The linear movement of the nut directly drives the slide block 203 to move synchronously up and down along the guide rail 207 inside the column 201, thereby driving the overall movement of the load plate 204, the acceleration drive assembly 42, the drone, etc. A safety cover is provided above the column 201, and the power unit is located inside the safety cover.

[0052] In practical use, firstly, rotate the cam 436 by turning the handle. The cam 436 has two symmetrical protrusions. Therefore, when the cam 436 rotates, it can push the sliders 434 on both sides to the sides and squeeze the spring 438. At this time, the two clamping plates 4300 move away from each other. Then, place the drone to be tested between the two clamping plates 4300. Then, rotate the handle in the opposite direction. Under the action of the spring 438, the slider 434 moves to the side of the cam 436, which in turn drives the two clamping plates 4300 to clamp the drone body. At this time, the connecting rod 4314 moves downward by pulling the rope 4316. The spring 111 is squeezed, and the limiting block 4317 is separated from the horizontal plate 4312 and does not contact it. The rope 4316 is in a taut state. The rebound force of the spring 111 is less than the rebound force of the spring 438. At this time, the horizontal sliding rod 437 will not be moved by pulling the rope 4316.

[0053] When simulating the free fall of a drone: the controller controls the lifting mechanism 2, which raises the lifting plate 3 to a certain height. Then, the controller controls the cylinder 421 to extend, which in turn moves the connecting plate 422, motor 432, housing 433, clamping plate 4300, and drone downwards synchronously. When the annular plate 4311 contacts the abutment plate 4244, it moves the abutment plate 4244 downwards and compresses the spring 4248. At this time, the downward speed of the annular plate 4311 is slowed down by the abutment plate 4244, while the downward speed of the housing 433 remains unchanged. At this time, the annular plate 4311 and the housing 433 will separate, and the distance will be released by the pull rope 4316. Pulling causes the horizontal slide bar 437 to move outward from the box 433, which in turn causes the slider 434 to move away from the cam 436, thereby separating the clamping plate 4300 from the drone. At this time, under the action of gravity, the drone makes free fall motion and falls into the drop collection tank 5, thus realizing the drop resistance test of the drone. As the box 433 continues to move downward, the squeezing force of the annular plate 4311 on the contact plate 4244 increases. When the contact plate 4244 comes into contact with the pressure sensor 4245, the pressure sensor 4245 detects the value and transmits it to the controller. At this time, the controller controls the cylinder 421 to stop working. By controlling the extension and retraction speed of the cylinder 421, the descent speed of the drone can be controlled.

[0054] When simulating a drone's rotating descent (initial descent speed 0): The controller activates motor 432, causing the housing 433 to rotate, which in turn rotates the clamping plate 4300 and the drone. Under centrifugal force, the slider 434 moves away from the cam 436 and compresses the spring 438, causing the clamping plate 4300 to separate from the drone. The drone will then continue rotating as it falls, thus simulating a rotating descent. This control method is suitable for drones with high rotational speeds. When the drone's rotational speed is low, the centrifugal force is insufficient to move the slider 434 away from the cam 436, and the drone will remain clamped. In this case, the trigger unit 424 is needed to release the drone. Specifically, as the drone slowly rotates under the influence of motor 432... Then, the cylinder 421 retracts, causing the housing 433 to rise, which in turn causes the second annular plate 4311 to rise, causing the first actuating rod 4318 to enter the gap between the adjacent second actuating rod 4319. Then, the cylinder 421 retraction is paused. At this time, the first actuating rod 4318 causes the second actuating rod 4319 to rotate, which in turn causes the threaded cylinder 4242 to rotate, which in turn causes the screw 4243 to rise, which in turn causes the first annular plate 4241 to rise, which in turn causes the contact plate 4244 to rise and contact the bottom of the second annular plate 4311, which in turn causes the second annular plate 4311 to rise. Then, the connecting rod 4314 and the pull rope 4316 pull the limiting ball 439 and the horizontal slide bar 437 to move, which in turn causes the slider 434 to move away from the cam 436, thereby separating the clamping plate 4300 from the drone. At this time, the drone falls while rotating at low speed.

[0055] When it is necessary to simulate the situation of a drone rotating and falling (increasing the falling speed), it is necessary to start the motor 432 to drive the drone to rotate, and then coordinate with the extension of the cylinder 421 to drive the drone to move downward. At this time, the falling speed of the drone rotating and falling can be adjusted.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An unmanned aerial vehicle anti-falling experiment device, characterized in that: Including base (1), lifting mechanism (2), lifting plate (3) and falling posture simulation mechanism (4), the lifting mechanism (2) is symmetrical and installed on the base (1), the lifting plate (3) is installed between the two groups of lifting mechanism (2), the falling posture simulation mechanism (4) is installed in the middle of the lifting plate (3), the falling posture simulation mechanism (4) includes mounting plate (41), acceleration drive assembly (42) and rotary drive assembly (43), the mounting plate (41) is through in the middle of the lifting plate (3), the acceleration drive assembly (42) is arranged on the mounting plate (41), the rotary drive assembly (43) is arranged on the acceleration drive assembly (42), the base (1) is further provided with a falling collection groove (5), and the falling collection groove (5) is located below the falling posture simulation mechanism (4). 2.The anti-falling experimental device for unmanned aerial vehicles according to claim 1, wherein: The acceleration drive assembly (42) includes a cylinder (421), the cylinder (421) is fixedly arranged in the middle of the mounting plate (41), the output end of the cylinder (421) is fixedly connected with a connecting plate (422), and the connecting plate (422) is located below the mounting plate (41), the rotary drive assembly (43) is arranged at the bottom of the connecting plate (422), the top of the connecting plate (422) is fixedly connected with a guide rod (423), the guide rod (423) vertically slides through the mounting plate (41) and is located around the cylinder (421). 3.The anti-falling experimental device of the unmanned aerial vehicle according to claim 2, wherein: The rotary drive assembly (43) includes a motor (432), a box (433) and a sliding block (434), the motor (432) is fixedly arranged at the bottom of the connecting plate (422), the box (433) is fixedly arranged on the output end of the motor (432), the rotating shaft (435) is rotatably arranged between the front and rear inner walls in the middle of the box (433), the cam (436) is fixedly sleeved on the rotating shaft (435), one end of the rotating shaft (435) extending to the front side of the box (433) is fixedly connected with a rotating handle, the sliding block (434) is slidably arranged in the box (433) and located on the left and right sides of the cam (436), the horizontal slide rod (437) is fixedly connected to the side wall of the sliding block (434) away from the cam (436), the other end of the horizontal slide rod (437) slides through the inner wall of one side of the box (433), the spring (438) is slidably sleeved on the horizontal slide rod (437), the spring (438) is abutted between the sliding block (434) and the inner wall of one side of the box (433), the limit ball (439) is fixedly connected to the end of the horizontal slide rod (437) located outside the box (433), the long slot (4310) is formed in the bottom of the box (433), the clamping plate (4300) is fixedly arranged at the bottom of the sliding block (434), and the clamping plate (4300) slides through the long slot (4310). 4.The anti-falling experimental device of the unmanned aerial vehicle according to claim 3, wherein: The acceleration driving assembly (42) further comprises a trigger unit (424) arranged on the mounting plate (41) and located around the cylinder (421), and the rotary driving assembly (43) further comprises a pulling unit (431) arranged on the left and right sides of the box (433), and the pulling unit (431) is connected with the trigger unit (424) and the limiting ball (439). 5.The anti-falling experimental device for UAVs of claim 4, wherein: The trigger unit (424) comprises an annular plate one (4241), a threaded cylinder (4242) and a screw rod (4243), the threaded cylinder (4242) is rotatably penetrated through the mounting plate (41) up and down through the bearing, and the screw rod (4243) is threadedly connected in the threaded cylinder (4242), and the annular plate one (4241) is fixedly connected with the bottom end of the screw rod (4243). 6.The anti-falling experimental device for UAVs of claim 5, wherein: The trigger unit (424) further comprises an abutting plate (4244) and a pressure sensor (4245), the abutting plate (4244) is located on one side of the screw rod (4243) and above the annular plate one (4241), the bottom of the abutting plate (4244) is symmetrically fixedly connected with a vertical sliding rod (4246), the vertical sliding rod (4246) is slidably penetrated through the annular plate one (4241), and the bottom end of the vertical sliding rod (4246) is fixedly connected with a limiting block one (4247), a spring two (4248) is slidably sleeved on the vertical sliding rod (4246), the spring two (4248) abuts between the abutting plate (4244) and the annular plate one (4241), the pressure sensor (4245) is fixedly installed on the annular plate one (4241), and the abutting plate (4244) abuts against the pressure sensor (4245) when moving downward; the top of the abutting plate (4244) is further provided with a bull eye bearing (4249). 7.The anti-falling experimental device of the unmanned aerial vehicle according to claim 6, wherein: The pulling unit (431) comprises an annular plate two (4311), a horizontal plate (4312), a supporting rod (4313), a connecting rod (4314), a guide rope wheel (4315) and a pull rope (4316), the horizontal plate (4312) is fixedly connected on one side wall of the box (433), the connecting rod (4314) is slidably penetrated through the horizontal plate (4312) up and down, the bottom end of the connecting rod (4314) is fixedly connected with a limiting block two (4317), one end of the supporting rod (4313) is fixedly connected with the bottom of the horizontal plate (4312), the guide rope wheel (4315) is rotatably installed on the other end of the supporting rod (4313) and is located on one side of the displacement limiting ball (439), one end of the pull rope (4316) is fixedly connected with the limiting ball (439), one end of the pull rope (4316) is fixedly connected with the limiting block two (4317) after passing through the guide rope wheel (4315), the annular plate two (4311) is fixedly connected with the top end of the connecting rod (4314), the screw rod (4243) is located inside the annular plate two (4311), and the annular plate two (4311) is in contact with the bull eye bearing (4249) on the top of the abutting plate (4244) when moving downward. 8.The anti-falling experimental device of the unmanned aerial vehicle according to claim 7, wherein: The annular plate two (4311) top circumference is distributed with the poking rod one (4318), the threaded cylinder (4242) bottom end on the circumference is distributed with the poking rod two (4319), the poking rod one (4318) is moved to pass through the clearance between two adjacent groups of poking rod two (4319). 9.The anti-falling experimental device of the unmanned aerial vehicle according to claim 8, wherein: The connecting rod (4314) is further connected with the limiting block three (110), and the limiting block three (110) is located above the horizontal plate (4312). The spring three (111) is sleeved on the connecting rod (4314) and abuts between the limiting block three (110) and the horizontal plate (4312). 10.The anti-falling experimental device of the unmanned aerial vehicle according to claim 9, wherein: The lifting mechanism (2) comprises two groups of symmetrically arranged columns (201), the inside of the column (201) is vertically provided with a screw rod auxiliary assembly (202), the upper end of the screw rod auxiliary assembly (202) is connected with a power device fixedly installed above the column (201), the screw rod nut of the screw rod auxiliary assembly (202) is fixedly installed with a sliding seat (203), the left and right sides and the rear side of the sliding seat (203) are installed with rollers (206), the inner wall of the column (201) is provided with guide rails (207) in rolling cooperation with the rollers (206), and the front side of the sliding seat (203) is fixedly installed with a carrier plate (204). One end of the lifting plate (3) is fixedly connected with the carrier plate (204).

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