Buffer devices and usage methods for horizontal impact tests of unmanned aerial vehicles

Abstract

This invention discloses a buffer device and its usage method for horizontal impact testing of unmanned aerial vehicles (UAVs). The buffer device includes an aluminum alloy box structure, a hydraulic telescopic rod, and a combined buffer block. The hydraulic telescopic rod and the combined buffer block are both built into the aluminum alloy box structure. A main control panel is installed on the front of the aluminum alloy box structure, including a touch screen and an emergency stop / reset button. Ventilation and observation slots are provided on the left and right sides of the aluminum alloy box structure. This invention discloses a buffer device and its usage method for horizontal impact testing of UAVs capable of intercepting loading slides carrying UAVs with different takeoff weights and maximum level flight speeds. After impact from the loading slide, the buffer device can promptly activate a locking mechanism to effectively prevent the deformed buffer layer from pushing back against the loading slide.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of collision safety test of unmanned aerial vehicles, and particularly relates to a buffer device for horizontal impact test of unmanned aerial vehicles and a use method thereof. BACKGROUND

[0002] With the vigorous development of low-altitude economy in China, unmanned aerial vehicles are widely used in the fields of transportation logistics, environmental monitoring, power inspection, etc. Unmanned aerial vehicle collision accidents with other targets occur from time to time due to failure of safety measures or operation errors during unmanned aerial vehicle operation. Unmanned aerial vehicle collision safety has become the focus of public attention.

[0003] Currently, the state formulates and standardizes relevant test standards for unmanned aerial vehicle collision safety, aiming to minimize the harm of unmanned aerial vehicles to human bodies during unmanned aerial vehicle collision process and after collision event. In the provisions 7.3.3 test loading of Appendix A.4 unmanned aerial vehicle collision personnel injury test (blunt injury test) of the national standard GB / T 44715-2024 "Requirements for collision safety of civil light small unmanned aerial vehicles" and the industry standard HB 8685-2021 "Test method for collision safety of civil light small unmanned aerial vehicles: horizontal impact test", similar unmanned aerial vehicle horizontal collision test diagrams are given, as shown in Figure 1

[0004] Buffer devices are needed in the test, which are required to block the loading slide at the terminal end of the slide rail, and cannot interfere with the motion trajectory of the unmanned aerial vehicle, and cannot push the loading slide in the opposite direction. Therefore, a buffer device for horizontal impact test of unmanned aerial vehicles and a use method thereof are proposed. SUMMARY

[0005] The main purpose of the application is to provide a buffer device for horizontal impact test of unmanned aerial vehicles and a use method thereof, which can block the loading slide of unmanned aerial vehicles with different take-off weights and different maximum steady speeds, and the buffer device can start the locking mechanism in time after being impacted by the loading slide, effectively preventing the deformed buffer layer from pushing the loading slide in the opposite direction.

[0006] To achieve the above purpose, the application provides a buffer device for horizontal impact test of unmanned aerial vehicles, which comprises an aluminum alloy box structure, a hydraulic telescopic rod and a combined buffer block, the hydraulic telescopic rod and the combined buffer block are both built-in in the aluminum alloy box structure, wherein:

[0007] ​The front of the aluminum alloy box structure is provided with a main control panel, which comprises a touch control screen and an emergency stop reset button; the left side and the right side of the aluminum alloy box structure are provided with ventilation observation slots (for gas circulation in the box during the collision test and observation to determine whether the internal combined buffer block and other component structures are normal); the inside of the upper top surface of the aluminum alloy box structure is provided with a first displacement sensor and a first limiting device; the inside of the lower bottom surface of the aluminum alloy box structure is provided with a second displacement sensor and a second limiting device; the front of the aluminum alloy box structure is open and serves as an impact collision surface of a sliding table (without installing an ultra-light aluminum alloy shell, the impact collision internal combined buffer block);

[0008] The combined buffer block is formed by stacking a plurality of same buffer monomers (having strong impact resistance and energy absorption effect), the buffer monomer comprises an upper layer, a lower layer, and N layers of tightly fitted 3D printing structure layers between the upper layer and the lower layer (the upper layer and the lower layer are high-strength and high-modulus square carbon plates made of T800 carbon fiber composite materials, which shape the buffer monomer and make it lightweight), the shape of the smallest unit of the 3D printing structure layer is an equilateral triangle, and the 3D printing structure layer is composed of the smallest units that are mutually edge-spreading;

[0009] The first limiting device and the second limiting device cooperate with the hydraulic telescopic rod to keep the combined buffer block fixed during the entire test process, and the first displacement sensor and the second displacement sensor (having millisecond-level dynamic response and micron-level measurement accuracy) are respectively attached to the upper and lower sides of the first collision buffer monomer of the combined buffer block, and real-time detect the deformation amount and position information of the combined buffer block during the test process, and feed back to the main control panel to start the locking mechanism.

[0010] As a further preferred technical solution of the above technical solution, the touch control screen is used to control the movement of the hydraulic telescopic rod of the internal scissors mechanical structure, collect the position information of the first displacement sensor and the second displacement sensor, and control the actions of the first limiting device and the second limiting device; the emergency stop reset button is used for emergency stop of operation failure of each component of the entire buffer device, reset of the hydraulic telescopic rod to the minimum contraction state, and release of the locking state of the first limiting device and the second limiting device.

[0011] As a further preferred technical solution of the above technical solution, a plurality of high-strength positioning plates welded by double-pulse MIG method are arranged around the lower bottom surface, and fastening bolts are used to connect the positioning plates with the cement floor or a fixed support, for fixing the entire buffer device (to prevent excessive collision kinetic energy during the test, and displacement of the buffer device); a plurality of screw holes are reserved on the upper top surface, and a lifting eye ring for a crane is installed (to facilitate transportation after disassembly and assembly of the device).

[0012] As a further preferred technical solution of the above technical solution, a circular bridge point (of large diameter) is printed at the common vertex of the smallest unit, for connecting adjacent 3D printed structure layers, and the bridge part (L1, L2,..., Ln) of the 3D printed structure layer is printed into a cylindrical bridge body (the height of the cylindrical bridge body is similar to the side length of the smallest unit of the 3D printed structure layer, and the diameter of the cylindrical bridge body is significantly larger than the axial line diameter of the smallest unit of the 3D printed structure layer) according to the circular bridge point.

[0013] As a further preferred technical solution of the above technical solution, the first limiting device and the second limiting device both have a linear slide rail and a magnetic limiting block, and during the collision test, the magnetic limiting block is used to lock the combined buffer block, so that the combined buffer block that has been deformed is prevented from recovering and thus pushing the sliding platform in the reverse direction; the hydraulic telescopic rod is provided with an ultra-light aluminum alloy flat plate, and the telescopic amount is adjusted according to the number of buffer units of the combined buffer block.

[0014] To achieve the above object, the application further provides a use method of the buffer device for horizontal impact test of the unmanned aerial vehicle, comprising the following steps:

[0015] Step S1: positioning and installing the buffer device; the upper top surface of the aluminum alloy box structure of the buffer device is provided with a lifting ring, the buffer device is dispatched by using a row of hoisting equipment, and is installed at the terminal of the slide rail of the horizontal collision test of the unmanned aerial vehicle; according to the requirements of the size of the slide platform, the specification of the test product, a plurality of positioning plates of the same type are stacked around the lower bottom surface, the overall height of the buffer device is adjusted, the slide platform is ensured to be able to completely collide with the internal combined buffer block during the test, the test product is reasonably placed on the position of the slide platform, and a distance is left for the slide platform to collide with and embed into the part of the buffer device, so as to avoid interfering with the inertial motion track of the unmanned aerial vehicle after collision;

[0016] Step S2: selecting buffer units to construct the combined buffer block, and calculating the collision kinetic energy E required to be applied by the dynamic loading device DN The calculation result is compared with the standard drop hazard classification, so as to determine the number of buffer units for constructing the combined buffer block;

[0017] Step S3: installing the combined buffer block in the buffer device; the first displacement sensor and the second displacement sensor are respectively attached to the upper and lower sides of the first collision buffer unit of the combined buffer block, the combined buffer block is pushed from the back of the buffer device, the magnetic limiting blocks of the first limiting device and the second limiting device are installed at the initial position, i.e. the end of the linear slide rail close to the collision side; at this time, the magnetic force is not required to be applied, and the magnetic limiting blocks are in a free state, but the linear slide rail end can lock the magnetic limiting blocks from sliding outwards; the movement of the hydraulic telescopic rod is controlled through the main control panel, the ultra-light aluminum alloy flat plate drives the combined buffer block to be pushed to the back of the buffer device until the combined buffer block contacts the first limiting device and the second limiting device, and then a pushing force is applied, at this time, the combined buffer block is in a collision ready state.

[0018] Step S4: whether the mechanical fit of the internal component structure is normal is observed and judged in the ventilation observation slot hole, the horizontal collision test is started, the magnetic force limiting block and the hydraulic telescopic rod are locked, the slide table impact collision combined buffer block, if the collision kinetic energy is too large, the cylindrical bridge body of the 3D printing structure layer of each buffer monomer in the combined buffer block will be deformed to different degrees to achieve the purpose of energy release; at this time, the first displacement sensor and the second displacement sensor measure the position change of the combined buffer block due to deformation in real time and feed back to the main control panel, the main control panel continuously optimizes and adjusts the limiting planning of the magnetic force limiting block according to the real-time measured deformation displacement, the preset collision kinetic energy, the collision contact area, the related structure parameters of the combined buffer block, ensures that the combined buffer block can be locked in time under the maximum deformation state, and effectively prevents the reverse push of the slide table due to deformation recovery;

[0019] Step S5: end the horizontal collision test and the emergency stop in the test, after ending the horizontal collision test and removing the slide table, the magnetic force limiting block is unlocked, the combined buffer block is deformed, the central processor in the main control panel automatically records the key parameters and limiting effect of the above limiting process, which is beneficial to the optimization of the limiting planning model; in order to ensure the safety of the test, the main control panel has a key component self-checking function, if the control and communication of the magnetic force limiting block, the displacement sensor and the hydraulic telescopic rod fail, the buffer device alarms; if an emergency failure occurs during the test, press the emergency stop reset button, the buffer device stops working; press and hold the emergency stop reset button to reset the hydraulic telescopic rod to the minimum contraction state, unlock the first limiting device and the second limiting device and reset. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a horizontal collision test principle diagram of the unmanned aerial vehicle.

[0021] Figure 2 It is the overall appearance structure of the buffer device of the application.

[0022] Figure 3 It is a left side sectional view of the buffer device of the application.

[0023] Figure 4 It is a structure schematic view of the buffer monomer of the application.

[0024] Figure 5 It is a structure schematic view of the 3D printing layer of the application.

[0025] The reference signs include: 101, main control panel; 102, front face; 103, lower bottom face; 104, positioning plate; 105, left side face; 106, ventilation observation slot hole; 107, upper top face; 108, lifting ring; 109, right side face; 201, hydraulic telescopic rod; 202, super-light aluminum alloy flat plate; 3, combined buffer block; 401, first displacement sensor; 402, second displacement sensor; 51, first limiting device; 52, second limiting device. DETAILED DESCRIPTION

[0026] The following description is provided to enable those skilled in the art to implement the present application. The preferred embodiments in the following description are only examples and other obvious modifications can be made by those skilled in the art. The basic principles defined in the following description can be applied to other embodiments, modifications, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.

[0027] In the preferred embodiments of the present application, those skilled in the art should note that the unmanned aerial vehicle and the like involved in the present application can be regarded as prior art.

[0028] Preferred embodiments.

[0029] For Figure 1 , A is a power loading device; B is a locking and releasing device; C is a (loading) sliding table; D is an unmanned aerial vehicle; E is a sliding rail; F is a buffer device; G is a high-speed camera; H is a dummy; I is a dummy support mechanism. The main test steps are as follows:

[0030] a) Obtain the loading parameters required for the maximum level flight speed of the test product by adjusting the power loading device, and adjust the data acquisition system and high-speed camera system, etc.

[0031] b) The test product is installed on the sliding table, and the locking and releasing device locks the sliding table;

[0032] c) Adjust the height and posture of the dummy so that the impact position of the test product is directly opposite the forehead of the dummy head or the chest of the dummy;

[0033] d) After the test loading device, data acquisition system, high-speed camera and test personnel are ready, launch the test product;

[0034] e) Collect test data;

[0035] f) Check the deformation and damage of the test product, and fill in the test site record table;

[0036] g) Test data analysis.

[0037] Buffering device is needed in the test, and it is required to be able to stop the loading slide at the end of the slide rail, not to interfere with the movement track of the unmanned aerial vehicle, and not to push the loading slide reversely.

[0038] As shown in Figures 2-5 The application discloses a buffering device for horizontal impact test of unmanned aerial vehicle, which comprises an aluminum alloy box structure, a hydraulic telescopic rod 201 and a combined buffer block 3, wherein the hydraulic telescopic rod 201 and the combined buffer block 3 are both built-in the aluminum alloy box structure.

[0039] The front surface 102 of the aluminum alloy box structure is provided with a main control panel 101, and the main control panel 101 comprises a touch central control screen and an emergency stop reset button; the left side surface 105 and the right side surface 109 of the aluminum alloy box structure are both provided with ventilation observation grooves 106 (for air flow in the box during the impact test and observation and judgment of whether the internal combined buffer block and other component structures are normal); the inside of the upper top surface 107 of the aluminum alloy box structure is provided with a first displacement sensor 401 and a first limiting device 51; the inside of the lower bottom surface 103 of the aluminum alloy box structure is provided with a second displacement sensor 402 and a second limiting device 52; the back surface of the aluminum alloy box structure is open and serves as an impact collision surface of the slide (without installation of an ultra-light aluminum alloy shell, the impact collision internal combined buffer block);

[0040] The combined buffer block 3 is formed by stacking a plurality of same buffer monomers (with strong impact resistance and energy absorption effect), and the buffer monomer comprises an upper layer P1, a lower layer P2 and N layers of tightly matched 3D printing structure layers Tn between the upper layer P1 and the lower layer P2 (the 3D printing structure layers Tn are adhesively connected with the upper layer P1 and the lower layer P2, the upper layer and the lower layer are high-strength and high-modulus square carbon plates made of T800 carbon fiber composite materials, the buffer monomer is shaped and lightened, the 3D printing structure layers (T1, T2,..., Tn) are formed by fused deposition printing, and the preferred material is polyurethane (PU) with certain toughness), the shape of the smallest unit of the 3D printing structure layer is an equilateral triangle, and the 3D printing structure layer is composed of the smallest units which are mutually edge-spreading;

[0041] The first limiting device 51 and the second limiting device 52 cooperate with the hydraulic telescopic rod 201 to keep the combined buffer block 3 fixed during the whole test process, the first displacement sensor 401 and the second displacement sensor 402 (with millisecond-level dynamic response and micrometer-level measurement accuracy) are respectively attached to the upper and lower sides of the first impact buffer monomer of the combined buffer block 3, and can real-time detect the deformation amount and position information of the combined buffer block 3 during the test process and feed back to the main control panel 101 to start the locking mechanism.

[0042] Specifically, the touch center screen is used for controlling the movement of the hydraulic telescopic rod 102 of the internal scissors mechanical structure, collecting the position information of the first displacement sensor 401 and the second displacement sensor 402, and controlling the action of the first limiting device 51 and the second limiting device 52; the emergency stop reset button is used for emergency stop of each component operation failure of the whole buffer device, resetting the hydraulic telescopic rod 201 to the minimum contraction state, and releasing the locking state of the first limiting device 51 and the second limiting device 52.

[0043] More specifically, the lower bottom surface 103 is provided with a plurality of high-strength positioning plates 104 welded by double-pulse MIG method around the periphery, which is connected with the cement floor or the fixed support by fastening bolts, and is used for fixing the whole buffer device (to prevent the collision kinetic energy from being too large during the test, and to cause the displacement of the buffer device); a plurality of screw holes are reserved on the upper top surface 107, and a lifting ring 108 for a travelling crane is installed (to facilitate the transportation after the device is disassembled).

[0044] Further, circular bridge points (large diameter) are printed at the common vertices of the minimum units, which are used for connecting adjacent 3D printed structure layers, and the bridge parts (L1, L2,..., Ln) of the 3D printed structure layers are printed into cylindrical bridge bodies of the same specification according to the circular bridge points (the height of the cylindrical bridge body is close to the side length of the minimum unit of the 3D printed structure layer, and the diameter is obviously larger than the axial line diameter of the minimum unit of the 3D printed structure layer).

[0045] Further, the first limiting device 51 and the second limiting device 52 are both provided with linear sliding rails (511, 521) and magnetic limiting blocks (512, 522), and during the collision test process, the magnetic limiting blocks (512, 522) are used for locking the combined buffer block, preventing the deformed combined buffer block from recovering, so as to push the sliding platform in the reverse direction; the hydraulic telescopic rod 201 is provided with an ultra-light aluminum alloy flat plate 202, and the telescopic amount is adjusted according to the number of buffer monomers of the combined buffer block 3.

[0046] The application also discloses a use method of the buffer device for horizontal impact test of the unmanned aerial vehicle.

[0047] Step S1: positioning and installing the buffer device; the upper top surface 107 of the aluminum alloy box structure of the buffer device is provided with a lifting ring 108, the buffer device is scheduled by using a travelling crane device, and is installed at the terminal of the sliding rail E for horizontal collision test of the unmanned aerial vehicle; according to the size of the sliding platform C and the requirements of the specification of the test product (unmanned aerial vehicle), a plurality of positioning plates 104 around the lower bottom surface 103 are stacked with the same type of positioning plate, the overall height of the buffer device is adjusted, and it is ensured that the sliding platform C can completely collide with the internal combined buffer block 3 during the test; the test product (unmanned aerial vehicle) is reasonably placed on the sliding platform C, and a distance is left for the sliding platform to collide with the embedded part of the buffer device, so as to avoid interfering with the inertial motion track of the unmanned aerial vehicle after collision;

[0048] Step S2: Select the buffer monomer to build the combined buffer block (According to GB / T 35018-2018 "Classification and Grading of Civil Unmanned Aircraft Systems" Clause 4.17: Classification based on crash hazard), calculate the crash kinetic energy E that the power loading device A needs to exert DN , compare the calculation result with the standard crash hazard level classification, and determine the number of buffer monomers for building the combined buffer block E DN is the flight impact kinetic energy, unit is joule (J); m is the mass of the unmanned aerial vehicle, unit is kilogram (kg); V DN is the equivalent speed (1.4 times the maximum flight speed), unit is meters per second (m / s). In order to consider the reliability of the subsequent limit locking function, compare the calculation result with the crash hazard level classification of the standard, if it belongs to class I (kinetic energy ≤10kJ) and class II (10kJ<kinetic energy≤95kJ), select 2 buffer monomers to build combined buffer block 3; if it belongs to class III (95kJ<kinetic energy≤1000kJ), select 3 to 20 buffer monomers to build combined buffer block 3; if it belongs to class IV (kinetic energy>1000kJ), select more than 20 buffer monomers to build combined buffer block 3, or use buffer monomers with more 3D printing structure layers (T1, T2,..., Tn) to build suitable combined buffer block 3);

[0049] Step S3: Install the combined buffer block 3 in the buffer device, the first displacement sensor 401 and the second displacement sensor 402 are respectively attached to the upper and lower sides of the first collision buffer monomer of the combined buffer block, and then the combined buffer block 3 is pushed from the back of the buffer device. The magnetic limit block (512, 522) of the first limiting device 51 and the second limiting device 52 is installed at the initial position, that is, the linear slide rail (511, 521) is close to the end of the collision side; At this time, no magnetic force needs to be applied, and the magnetic limit block (512, 522) is in a free state, but the linear slide rail (511, 521) end can lock the magnetic limit block from sliding out; Control the movement of the hydraulic telescopic rod 201 through the main control panel 101, drive the ultra-light aluminum alloy flat plate 202 to push the combined buffer block 3 to the back of the buffer device, until it contacts the first limiting device 51 and the second limiting device 52, and then apply a pushing force (3N to 5N), At this time, the combined buffer block 3 is in a collision-ready state;

[0050] Step S4: observe whether the mechanical fit of the internal component structure is normal in the vented observation slot hole 106, start the horizontal collision test, lock the magnetic limit block (512, 522) and the hydraulic telescopic rod 201, impact the combined buffer block 3 of the slide table C, if the collision kinetic energy is too large, the cylindrical bridge (L1, L2,..., Ln) of the 3D printing structure layer of each buffer monomer in the combined buffer block 3 will be deformed to a certain extent to release energy; at this time, the first displacement sensor and the second displacement sensor (401, 402) measure the position change of the combined buffer block 3 due to deformation in real time and feed back to the main control panel 101, and the main control panel 101 continuously optimizes and adjusts the limiting plan (including motion acceleration, magnetic force loading and unloading time, magnetic force application value and the like) of the magnetic limit block (512, 522) through the optimal algorithm model according to the real-time measured deformation displacement, the preset collision kinetic energy, the collision contact area and the related structure parameters of the combined buffer block 3, so that the combined buffer block 3 can be timely locked in the maximum deformation state, and the deformation recovery is effectively prevented to push the slide table C (it can be clearly understood that under the premise of meeting the buffer function of each falling and collision hazard level, the more the number of stacked buffer monomers of the combined buffer block 3 is, the more complex the internal mechanical mechanism of the combined buffer block 3 is, and the more difficult the limiting device (51, 52) is to realize efficient locking. Therefore, step S3 gives the corresponding buffer monomer combination quantity of different falling and collision hazard levels);

[0051] Step S5: end the horizontal collision test and the test failure emergency stop, after ending the horizontal collision test and removing the slide table C, the magnetic limit block (512, 522) is unlocked, the combined buffer block 3 is deformed, the central processing unit in the main control panel 101 automatically records the key parameters and limiting effect of the above limiting process, which is beneficial to the optimization of the limiting plan model; in order to ensure the safety of the test, the main control panel 101 has a key component self-checking function, if the control and communication of the magnetic limit block (512, 522), the displacement sensor (401, 402) and the hydraulic telescopic rod 201 fail, the buffer device alarms; if an emergency failure occurs during the test, press the emergency stop reset button, and the buffer device stops working; (if necessary) press and hold the emergency stop reset button to reset the hydraulic telescopic rod 201 to the minimum contraction state, unlock the first limiting device 51 and the second limiting device 52 and reset.

[0052] It is worth mentioning that the unmanned aerial vehicle and other technical features involved in the present patent application should be regarded as prior art, and the specific structure, working principle and possible control method and spatial arrangement method of these technical features can be selected by using the conventional selection in the art, and should not be regarded as the invention point of the present patent, and the present patent will not be further expanded and described in detail.

[0053] Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A buffer device for horizontal impact test of a drone, characterized in that, The aluminum alloy box structure, the hydraulic telescopic rod and the combined buffer block are all built in the aluminum alloy box structure, wherein: The front face of the aluminum alloy box structure is provided with a main control panel containing a touch control screen and an emergency stop reset button; the left and right sides of the aluminum alloy box structure are both provided with ventilation observation slots; the inside of the upper top surface of the aluminum alloy box structure is provided with a first displacement sensor and a first limiting device; the inside of the lower bottom surface of the aluminum alloy box structure is provided with a second displacement sensor and a second limiting device; the back face of the aluminum alloy box structure is open and serves as the impact collision surface of the sliding table; The combined buffer block is formed by stacking a plurality of identical buffer monomers, each buffer monomer comprising an upper layer, a lower layer and N layers of tightly fitted 3D printing structure layers between the upper layer and the lower layer, the smallest unit of the 3D printing structure layer being in the shape of an equilateral triangle, and the 3D printing structure layer being formed by mutually edge-spreading the smallest units; The first limiting device and the second limiting device cooperate with the hydraulic telescopic rod to keep the combined buffer block fixed during the entire test process, the first displacement sensor and the second displacement sensor respectively adhere to the upper and lower sides of the first buffer monomer of the combined buffer block and real-time detect the deformation amount and position information of the combined buffer block during the test process, and feed back to the main control panel to start the locking mechanism; A circular bridge point is printed at the common vertex of the smallest unit for connecting adjacent 3D printing structure layers, and the bridge part of the 3D printing structure layer is printed into a cylindrical bridge body of the same specification according to the circular bridge point; The first limiting device and the second limiting device both have linear sliding rails and magnetic limiting blocks, the magnetic limiting blocks being used to lock the combined buffer block during the impact test to prevent the deformed combined buffer block from recovering and thus pushing the sliding table in the reverse direction; the hydraulic telescopic rod is provided with an ultra-light aluminum alloy flat plate, and the telescopic amount is adjusted according to the number of buffer monomers of the combined buffer block.

2. The buffer device for horizontal impact test of a UAV according to claim 1, wherein, The touch control screen is used to control the movement of the hydraulic telescopic rod of the internal scissors mechanical structure, collect the position information of the first displacement sensor and the second displacement sensor, and control the actions of the first limiting device and the second limiting device; the emergency stop reset button is used for emergency stop of operation failure of each component of the entire buffer device, reset of the hydraulic telescopic rod to the minimum contraction state, and release of the locking state of the first limiting device and the second limiting device.

3. The buffer device for horizontal impact test of a UAV according to claim 2, wherein, A plurality of high-strength positioning plates welded by the double-pulse MIG method are arranged around the lower bottom surface, and are connected with the cement floor or a fixed support by fastening bolts, for fixing the entire buffer device; a plurality of screw holes are reserved on the upper top surface, and a lifting eye ring for a travelling crane is installed.

4. A method for using the buffer device for horizontal impact test of unmanned aerial vehicle, applied to the buffer device for horizontal impact test of unmanned aerial vehicle according to any one of claims 1-3, characterized in that, The method comprises the following steps: Step S1: Position the installation buffer device, the upper top surface of the aluminum alloy box structure of the buffer device is installed with a lifting ring, and the buffer device is scheduled by using a row of hoisting equipment and installed at the terminal of the slide rail of the unmanned aerial vehicle horizontal collision test; according to the requirements of the size of the slide table, the specification of the test product, and the requirements of the test product, the multiple positioning plates around the lower bottom surface are stacked with the same type of positioning plates, the overall height of the buffer device is adjusted, and it is ensured that the slide table can completely collide with the internal combined buffer block during the test; the test product is reasonably placed on the slide table, and a distance is left for the slide table to collide with the embedded part of the buffer device to avoid interfering with the inertial motion track of the unmanned aerial vehicle after collision; Step S2: selecting buffer monomers to construct the combined buffer block, and calculating the collision kinetic energy required to be applied by the power loading device comparing the calculation result with the standard falling hazard level classification, so as to determine the number of buffer monomers for constructing the combined buffer block; Step S3: The buffer device installs the combined buffer block, the first displacement sensor and the second displacement sensor are respectively attached to the upper and lower sides of the first collision buffer monomer of the combined buffer block, and then the combined buffer block is pushed into from the back of the buffer device. The magnetic limiting block of the first limiting device and the second limiting device is installed at the initial position, that is, the end of the linear slide rail close to the collision side; At this time, the magnetic force limiting block is in a free state without magnetic force, but the linear slide rail end can lock the magnetic force limiting block from sliding outwards; The movement of the hydraulic telescopic rod is controlled through the main control panel, the ultra-light aluminum alloy flat plate drives the combined buffer block to the back of the buffer device until it contacts the first limiting device and the second limiting device, and then a pushing force is applied. At this time, the combined buffer block is in a collision-ready state; Step S4: Observe whether the mechanical cooperation of the internal component structure is normal through the ventilation observation slot hole, start the horizontal collision test, lock the magnetic force limiting block and the hydraulic telescopic rod, and the slide table impacts and collides with the combined buffer block. If the collision kinetic energy is too large, the cylindrical bridge body of the 3D printing structure layer of each buffer monomer in the combined buffer block will deform to different degrees to achieve the purpose of energy release. At this time, the first displacement sensor and the second displacement sensor real-time measure the position change of the combined buffer block due to deformation and feed back to the main control panel. The main control panel continuously optimizes and adjusts the limiting planning of the magnetic force limiting block according to the real-time measured deformation displacement, the pre-set collision kinetic energy, the collision contact area, and the related structure parameters of the combined buffer block through the optimal algorithm model, to ensure that the combined buffer block can be locked in time under the maximum deformation state, effectively preventing the reverse push of the slide table due to deformation recovery; Step S5: End the horizontal collision test and the test failure emergency stop. After the horizontal collision test is ended and the slide table is removed, the magnetic force limiting block is unlocked, the combined buffer block deforms, the central processor in the main control panel automatically records the key parameters and limiting effect of the above limiting process, which is beneficial to the optimization of the limiting planning model; To ensure the safety of the test, the main control panel has a key component self-checking function. If the control and communication of the magnetic force limiting block, the displacement sensor and the hydraulic telescopic rod fail, the buffer device will alarm. If an emergency failure occurs during the test, press the emergency stop reset button to stop the operation of the buffer device. Long press the emergency stop reset button to reset the hydraulic telescopic rod to the minimum contraction state, unlock the first limiting device and the second limiting device, and reset.

Images