Array type high-energy laser countering unmanned aerial vehicle test method and device

Abstract

The invention relates to the technical field of unmanned aerial vehicle testing, in particular to an array type high-energy laser countering unmanned aerial vehicle testing method and device, and the method comprises the steps: preparing a testing device and an unmanned aerial vehicle; performing a laser countering unmanned aerial vehicle test; the ablation process is observed, the ablated morphology of the unmanned aerial vehicle is analyzed, and the ablation area radius and the ablation depth of the tested unmanned aerial vehicle are obtained; finite element simulation is carried out on the test process, and the simulated unmanned aerial vehicle ablation area radius and ablation depth are obtained; and comparing the radius and the ablation depth of the ablation area of the unmanned aerial vehicle obtained by simulation and test, adjusting finite element simulation parameters to enable a simulation result to be matched with a test result, and exporting an ablation depth-time change curve of the key point of the simulated ablation area. According to the invention, a scheme capable of making up for insufficient definition of remote image tracking equipment is provided, the number of high-power lasers is increased, and the unmanned aerial vehicle is hit in a larger range; multi-point high-temperature ablation of the target unmanned aerial vehicle is realized, and the probability of striking vulnerable parts of the unmanned aerial vehicle is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicle testing, and in particular to an array type high energy laser counter-unmanned aerial vehicle testing method and device. Background Art

[0002] In recent years, drone countermeasures have become an important issue facing academia and engineering. High-power laser weapons have the advantages of low cost and rapid strike, and have gradually gained attention in the field of drone countermeasures. When using high-energy lasers to ablate drone structures, it is necessary to ensure that the laser reaches a certain energy density per unit area to achieve the purpose of ablation.

[0003] Based on the needs of long-range target tracking, laser weapons need to be combined with radar or optical image tracking equipment, and the target point determined by tracking is generally the strike center point of the high-energy laser. Although the image recognition system can track the target of the UAV, it will cause unclear imaging when facing a small-sized UAV at a long distance. At the same time, when a single-beam laser design is adopted, due to unclear image tracking, it is difficult for a single-beam laser to accurately hit a specific part of the UAV, which can easily cause inaccurate strikes. In order to make up for the shortcomings of image tracking equipment, it is necessary to develop laser equipment with a larger strike range. Arrayed high-energy lasers composed of multiple high-energy lasers can solve the problem of inaccurate strikes, but the more high-energy lasers there are, the higher the cost. Therefore, it is necessary to analyze the mechanism of arrayed high-energy laser strikes against UAVs through experiments to optimize the structure of arrayed high-energy lasers and reduce costs while ensuring strike efficiency.

[0004] Therefore, it is necessary to design an array high-energy laser counter-UAV test method. Summary of the invention

[0005] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide an array-type high-energy laser counter-UAV test method and device.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows: a method for testing an array high-energy laser to counter UAV, comprising the following steps: Step 1, prepare a test device and a UAV; the test device includes a high-energy laser array assembly, an automatic rotating pan-tilt platform, a high-speed camera, an infrared camera, and a laser sight; the high-energy laser array assembly includes a carrier box and a plurality of high-power lasers; the plurality of high-power lasers are arranged in parallel in the carrier box to form a laser array; the laser array is used to emit a high-power laser beam to the UAV to ablate the UAV; the automatic rotating pan-tilt platform is used to drive the carrier box to rotate to adjust the emission direction of the high-power laser beam; the high-speed camera is used to capture images of the test process; the infrared camera is used to capture a heat distribution diagram of the UAV when it is ablated; and the laser sight is used to emit a sighting laser parallel to the high-power laser beam to detect the UAV; Step 2, conducting a laser countermeasure UAV test; turning on the automatic rotating gimbal, high-speed camera, infrared camera, and laser sight, remotely controlling the UAV to fly into the test area, and when the laser sight detects the UAV, remotely controlling the laser array to emit a high-power laser beam to the UAV to ablate the UAV; Step 3, observe the ablation process and analyze the morphology of the ablated UAV, and obtain the radius and depth of the ablation area of ​​the tested UAV; Step 4, perform finite element simulation on the test process to obtain the radius and depth of the simulated UAV ablation area; Step 5, compare the radius and ablation depth of the UAV ablation area obtained by simulation and experiment, adjust the finite element simulation parameters to make the simulation results consistent with the experimental results, and derive the ablation depth-time variation curve of the key points of the simulated ablation area.

[0007] Furthermore, in step 1, the high-energy laser array assembly further includes a plurality of water-cooled radiators, and the water-cooled radiators are used to dissipate heat from the high-power lasers.

[0008] Furthermore, in step 3, observing the ablation process specifically includes: Based on the images taken by the high-speed camera, the process from the drone being irradiated by the high-energy laser array to its fall is recorded to obtain key time parameters and ; in, is the total time from when the laser starts ablation to when the drone starts to fall rapidly; It is the time from when the laser starts ablation to when the UAV starts to experience an unbalanced state of rolling, tilting and spinning.

[0009] Furthermore, in step 3, analyzing the morphology of the ablated drone specifically includes: Analyze the images taken by the high-speed camera to observe whether multiple parts of the drone are ablated and the distribution of the ablated parts; The microscopic morphology of the ablated parts of the drone was observed under an optical microscope, and the ablation degrees of different parts were compared. The area with the highest ablation degree was defined as the core ablation area, the remaining areas with low ablation degrees were defined as secondary ablation areas, and the areas without ablation were defined as intact areas. The center and boundary morphology of the ablation area of ​​each ablated part were analyzed to obtain the radius and ablation depth of the UAV ablation area.

[0010] Furthermore, in step 4, it specifically includes: Establish a two-dimensional geometric model of the UAV shell in COMSOL software and divide the mesh; Set the finite element simulation parameters and input the Gaussian beam algorithm in the laser spectral cavity to perform finite element simulation analysis on the ablation process; Output the simulation results, obtain the radius and ablation depth of the simulated UAV ablation area, and export the ablation depth-time variation curve of the key points of the simulated ablation area.

[0011] Furthermore, the Gaussian beam algorithm in the laser spectral cavity specifically includes: The q parameters of the Gaussian beam are transformed into M = The transformation of an optical system also follows the ABCD law, namely: ; ; Where: and is the q parameter before transmission transformation; and is the q parameter after transmission transformation; if the Gaussian beam passes through an optical system with multiple optical elements, the transformation matrix M Transformation matrix of each optical element Determined by the product of when or Parameters and When it is known, the ABCD law can be used to find q or Parameter, and then perform the operation of separating the real and imaginary parts according to the parameter to obtain the curvature radius R(z) of the isophase surface at this position, the spot radius w(z), the position from the beam waist and the beam waist radius; Assume that the Gaussian beam in the laser spectral cavity is represented by the q parameter, and the transmission matrix of a round trip at cavity mirror 1 is , the q of the resonant beam and The parameters satisfy the self-reproducibility condition: ; ; Solution Parameters, we can get: ; ; Solving for the q parameter, we get: ; ; Where i is the identity matrix; When solving the q parameter numerically, there will be multiple solutions. The rule for selecting the solution is: the solution that makes the square of the half-width of the beam positive should be selected; After finding the q parameter, separate its real and imaginary parts, which correspond to the beam waist position and beam waist radius of the light beam respectively; use the ABCD law to find the beam parameters of the Gaussian beam after the optical system transformation, and thus obtain the beam waist position and beam waist radius after the beam transmission transformation; Find After the parameters are determined, the real part and the imaginary part are separated. The real part and the imaginary part correspond to the curvature radius of the phase surface and the spot radius of the light beam respectively. The beam parameters of the Gaussian beam after the optical system transformation are calculated by using the ABCD law, so as to obtain the curvature radius of the phase surface and the spot radius after the light beam transmission transformation.

[0012] The present invention also provides an array-type high-energy laser counter-UAV test device, including a high-energy laser array component, an automatic rotating pan / tilt platform, a high-speed camera, an infrared camera, and a laser sight. The high-energy laser array assembly includes a carrier box and a plurality of high-power lasers, wherein the plurality of high-power lasers are arranged in parallel in the carrier box to form a laser array, and the laser array is used to emit a high-power laser beam to the drone to ablate the drone; The automatic rotating platform is arranged at the bottom of the carrying box, and is used to drive the carrying box to rotate so as to adjust the emission direction of the high-power laser beam; The high-speed camera and the infrared camera are both arranged near the high-energy laser array assembly, the high-speed camera is used to capture images of the test process, and the infrared camera is used to capture a heat distribution diagram of the drone when it is ablated; The laser sight is arranged on the top of the carrying box, and is used for emitting a sighting laser parallel to the high-power laser beam to detect the UAV.

[0013] Furthermore, the high-energy laser array assembly also includes a plurality of water-cooled radiators, the water-cooled radiators are in contact with the corresponding high-power lasers, and the water-cooled radiators are used to dissipate heat from the high-power lasers.

[0014] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following beneficial effects: 1. The present invention proposes a solution to compensate for the lack of clarity of remote image tracking equipment, increases the number of high-power lasers, and achieves strikes against drones in a wider range; achieves multi-point high-temperature ablation of target drones, and increases the probability of striking vulnerable parts of drones; 2. The present invention analyzes the mechanism of array high-energy laser attacking UAVs through experiments to optimize the structure of array high-energy lasers, thereby reducing costs while ensuring attack efficiency; 3. The test method of the present invention combines actual tests with finite element simulation, which ensures the accuracy of the test results and reduces the test cost through finite element simulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a flow chart of the steps of an array high-energy laser counter-UAV test method in a preferred embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of the test device and the UAV in the preferred embodiment of the present invention; Figure 3 It is a schematic structural diagram of a high energy laser array assembly in a preferred embodiment of the present invention; Explanation of the numbers in the figure: 1 UAV, 2 automatic rotating gimbal, 3 high-speed camera, 4 infrared camera, 5 laser sight, 6 carrying box, 7 high-power laser, 8 water-cooled radiator. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] Reference Figure 1 As shown, a preferred embodiment of the present invention, an array high-energy laser counter-UAV test method, comprises the following steps: Step 1, prepare a test device and a UAV 1; the test device includes a high-energy laser array assembly, an automatic rotating pan-tilt platform 2, a high-speed camera 3, an infrared camera 4, and a laser sight 5. The high-energy laser array assembly includes a carrier box 6 and a plurality of high-power lasers 7. The plurality of high-power lasers 7 are arranged in parallel in the carrier box 6 to form a laser array, and the laser array is used to emit a high-power laser beam to the UAV 1 to ablate the UAV 1. The automatic rotating pan-tilt platform 2 is used to drive the carrier box 6 to rotate to adjust the emission direction of the high-power laser beam. The high-speed camera 3 is used to capture images of the test process. The infrared camera 4 is used to capture a heat distribution diagram of the UAV 1 when it is ablated. The laser sight 5 is used to emit a sighting laser parallel to the high-power laser beam to detect the UAV 1. Step 2, conducting a laser countermeasure test against the UAV 1; turning on the automatic rotating gimbal 2, the high-speed camera 3, the infrared camera 4, and the laser sight 5, remotely controlling the UAV 1 to fly into the test area, and when the laser sight 5 detects the UAV 1, remotely controlling the laser array to emit a high-power laser beam to the UAV 1 to ablate the UAV 1; Step 3, observe the ablation process and analyze the morphology of the ablated UAV 1, and obtain the radius and depth of the ablation area of ​​the UAV 1 under test; Step 4, performing finite element simulation on the test process to obtain the radius and depth of the ablation area of ​​the simulated UAV 1; Step 5, comparing the radius and depth of the ablation area of ​​the UAV 1 obtained by simulation and experiment, adjusting the finite element simulation parameters to make the simulation results consistent with the experimental results, and deriving the ablation depth-time variation curve of the key points of the simulated ablation area.

[0018] The present invention proposes a solution that can make up for the insufficient clarity of the long-range image tracking equipment, increases the number of high-power lasers, and achieves the attack on the UAV 1 in a larger range; achieves multi-point high-temperature ablation of the target UAV 1, and increases the probability of attacking the vulnerable parts of the UAV; the present invention analyzes the mechanism of array high-energy laser attack on the UAV 1 through experiments to optimize the structure of the array high-energy laser, while ensuring the attack efficiency, reducing the cost; the test method of the present invention combines actual tests and finite element simulations, which ensures the accuracy of the test results and reduces the test costs through finite element simulations.

[0019] As a preferred embodiment of the present invention, it may also have the following additional technical features: In this embodiment, in step 1, the high-energy laser array assembly further includes a plurality of water-cooled radiators 8, which are used to dissipate heat from the high-power laser 7. Since the high-power laser 7 generates too much heat during operation, each high-power laser 7 is equipped with a water-cooled radiator 8 to dissipate heat to prevent the device from burning out.

[0020] In this embodiment, in step 3, observing the ablation process specifically includes: Based on the images taken by the high-speed camera 3, the process from the drone 1 being irradiated by the high-energy laser array to the drone falling is recorded to obtain key time parameters. and ; in, is the total time from the start of laser ablation to the start of the rapid fall of UAV 1; It is the time from when the laser starts ablation to when the drone 1 starts to experience an unbalanced state of rolling, tilting and spinning.

[0021] In this embodiment, in step 3, analyzing the ablated morphology of the drone 1 specifically includes: Analyze the images captured by the high-speed camera 3 to observe whether multiple parts of the drone 1 are ablated and the distribution of the ablated parts; The microscopic morphology of the ablated part of the drone 1 was observed under an optical microscope, and the ablation degrees of different parts were compared. The area with the highest ablation degree was defined as the core ablation area, the remaining areas with low ablation degrees were defined as secondary ablation areas, and the areas without ablation were defined as intact areas; The ablation area center and boundary morphology of each ablated part were analyzed to obtain the ablation area radius and ablation depth of UAV 1.

[0022] In this embodiment, step 4 specifically includes: A two-dimensional geometric model of the shell of UAV 1 was established in COMSOL software, and the mesh was divided; Set the finite element simulation parameters and input the Gaussian beam algorithm in the laser spectral cavity to perform finite element simulation analysis on the ablation process; Output the simulation results, obtain the radius and depth of the ablation area of ​​the simulated UAV 1, and derive the ablation depth-time variation curve of the key points of the simulated ablation area.

[0023] In this embodiment, the Gaussian beam algorithm in the laser spectral cavity specifically includes: The q parameters of the Gaussian beam are transformed into M = The transformation of an optical system also follows the ABCD law, namely: ; ; Where: and is the q parameter before transmission transformation; and is the q parameter after transmission transformation; if the Gaussian beam passes through an optical system with multiple optical elements, the transformation matrix M Transformation matrix of each optical element Determined by the product of when or Parameters and When it is known, the ABCD law can be used to find q or Parameter, and then perform the operation of separating the real and imaginary parts according to the parameter to obtain the curvature radius R(z) of the isophase surface at this position, the spot radius w(z), the position from the beam waist and the beam waist radius; Assume that the Gaussian beam in the laser spectral cavity is represented by the q parameter, and the transmission matrix of a round trip at cavity mirror 1 is , the q of the resonant beam and The parameters satisfy the self-reproducibility condition: ; ; Solution Parameters, we can get: ; ; Solving for the q parameter, we get: ; ; Where i is the identity matrix; When solving the q parameter numerically, there will be multiple solutions. The rule for selecting the solution is: the solution that makes the square of the half-width of the beam positive should be selected; After finding the q parameter, separate its real and imaginary parts, which correspond to the beam waist position and beam waist radius of the light beam respectively; use the ABCD law to find the beam parameters of the Gaussian beam after the optical system transformation, and thus obtain the beam waist position and beam waist radius after the beam transmission transformation; Find After the parameters are determined, the real part and the imaginary part are separated. The real part and the imaginary part correspond to the curvature radius of the phase surface and the spot radius of the light beam respectively. The beam parameters of the Gaussian beam after the optical system transformation are calculated by using the ABCD law, so as to obtain the curvature radius of the phase surface and the spot radius after the light beam transmission transformation.

[0024] Reference Figures 2 to 3As shown, the present invention also provides an array type high energy laser counter UAV test device, including a high energy laser array component, an automatic rotating pan-tilt platform 2, a high speed camera 3, an infrared camera 4, and a laser sight 5. The high-energy laser array assembly includes a carrier box 6 and a plurality of high-power lasers 7. The plurality of high-power lasers 7 are arranged in parallel in the carrier box 6 to form a laser array, and the laser array is used to emit a high-power laser beam to the drone 1 to ablate the drone 1. The automatic rotating platform 2 is arranged at the bottom of the carrying box 6, and is used to drive the carrying box 6 to rotate so as to adjust the emission direction of the high-power laser beam; The high-speed camera 3 and the infrared camera 4 are both arranged near the high-energy laser array assembly. The high-speed camera 3 is used to capture images of the test process, and the infrared camera 4 is used to capture the heat distribution diagram of the drone 1 when it is ablated. The laser sight 5 is disposed on the top of the carrier box 6 , and the laser sight 5 is used to emit a sighting laser parallel to the high-power laser beam to detect the UAV 1 .

[0025] In this embodiment, the high-energy laser array assembly further includes a plurality of water-cooled radiators 8 , which are in contact with the corresponding high-power lasers 7 , and are used to dissipate heat from the high-power lasers 7 .

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and improved concepts of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A method for testing an array high-energy laser to counter UAVs, characterized in that: The following steps are involved: Step 1, prepare a test device and a UAV; the test device includes a high-energy laser array assembly, an automatic rotating pan-tilt platform, a high-speed camera, an infrared camera, and a laser sight; the high-energy laser array assembly includes a carrier box and a plurality of high-power lasers; the plurality of high-power lasers are arranged in parallel in the carrier box to form a laser array; the laser array is used to emit a high-power laser beam to the UAV to ablate the UAV; the automatic rotating pan-tilt platform is used to drive the carrier box to rotate to adjust the emission direction of the high-power laser beam; the high-speed camera is used to capture images of the test process; the infrared camera is used to capture a heat distribution diagram of the UAV when it is ablated; and the laser sight is used to emit a sighting laser parallel to the high-power laser beam to detect the UAV; Step 2, conducting a laser countermeasure UAV test; turning on the automatic rotating gimbal, high-speed camera, infrared camera, and laser sight, remotely controlling the UAV to fly into the test area, and when the laser sight detects the UAV, remotely controlling the laser array to emit a high-power laser beam to the UAV to ablate the UAV; Step 3, observe the ablation process and analyze the morphology of the ablated UAV, and obtain the radius and depth of the ablation area of ​​the tested UAV; Step 4, perform finite element simulation on the test process to obtain the radius and depth of the simulated UAV ablation area; Step 5, compare the radius and ablation depth of the UAV ablation area obtained by simulation and experiment, adjust the finite element simulation parameters to make the simulation results consistent with the experimental results, and derive the ablation depth-time variation curve of the key points of the simulated ablation area.

2. The array high-energy laser counter-UAV test method according to claim 1 is characterized in that: In step 1, the high-energy laser array assembly further includes a plurality of water-cooled radiators, and the water-cooled radiators are used to dissipate heat from the high-power lasers.

3. The array high-energy laser counter-UAV test method according to claim 1 is characterized in that: In step 3, observing the ablation process specifically includes: Based on the images taken by the high-speed camera, the process from the drone being irradiated by the high-energy laser array to its fall is recorded to obtain key time parameters and ; in, is the total time from when the laser starts ablation to when the drone starts to fall rapidly; It is the time from when the laser starts ablation to when the UAV starts to experience an unbalanced state of rolling, tilting and spinning.

4. The array high-energy laser counter-UAV test method according to claim 1 is characterized in that: In step 3, analyzing the morphology of the ablated drone specifically includes: Analyze the images taken by the high-speed camera to observe whether multiple parts of the drone are ablated and the distribution of the ablated parts; The microscopic morphology of the ablated parts of the drone was observed under an optical microscope, and the ablation degrees of different parts were compared. The area with the highest ablation degree was defined as the core ablation area, the remaining areas with low ablation degrees were defined as secondary ablation areas, and the areas without ablation were defined as intact areas. The center and boundary morphology of the ablation area of ​​each ablated part were analyzed to obtain the radius and ablation depth of the UAV ablation area.

5. The array high-energy laser counter-UAV test method according to claim 1 is characterized in that: In the step 4, it specifically includes: Establish a two-dimensional geometric model of the UAV shell in COMSOL software and divide the mesh; Set the finite element simulation parameters and input the Gaussian beam algorithm in the laser spectral cavity to perform finite element simulation analysis on the ablation process; Output the simulation results, obtain the radius and ablation depth of the simulated UAV ablation area, and export the ablation depth-time variation curve of the key points of the simulated ablation area.

6. The array high-energy laser counter-UAV test method according to claim 5 is characterized in that: The Gaussian beam algorithm in the laser spectral cavity specifically includes: The q parameters of the Gaussian beam are transformed into M = The transformation of an optical system also follows the ABCD law, namely: ； ； Where: and is the q parameter before transmission transformation; and is the q parameter after transmission transformation; if the Gaussian beam passes through an optical system with multiple optical elements, the transformation matrix M Transformation matrix of each optical element Determined by the product of when or Parameters and When it is known, the ABCD law can be used to find q or Parameter, and then perform the operation of separating the real and imaginary parts according to the parameter to obtain the curvature radius R(z) of the isophase surface at this position, the spot radius w(z), the position from the beam waist and the beam waist radius; Assume that the Gaussian beam in the laser spectral cavity is represented by the q parameter, and the transmission matrix of a round trip at cavity mirror 1 is , the q of the resonant beam and The parameters satisfy the self-reproducibility condition: ； ； Solution Parameters, we can get: ； ； Solving for the q parameter, we get: ； ； Where i is the identity matrix; When solving the q parameter numerically, there will be multiple solutions. The rule for selecting the solution is: the solution that makes the square of the half-width of the beam positive should be selected; After finding the q parameter, separate its real and imaginary parts, which correspond to the beam waist position and beam waist radius of the light beam respectively; use the ABCD law to find the beam parameters of the Gaussian beam after the optical system transformation, and thus obtain the beam waist position and beam waist radius after the beam transmission transformation; Find After the parameters are determined, the real part and the imaginary part are separated. The real part and the imaginary part correspond to the curvature radius of the phase surface and the spot radius of the light beam respectively. The beam parameters of the Gaussian beam after the optical system transformation are calculated by using the ABCD law, so as to obtain the curvature radius of the phase surface and the spot radius after the light beam transmission transformation.

7. An array type high energy laser anti-UAV test device, characterized in that: Including high-energy laser array components, automatic rotating pan / tilt, high-speed camera, infrared camera, laser sight, The high-energy laser array assembly includes a carrier box and a plurality of high-power lasers, wherein the plurality of high-power lasers are arranged in parallel in the carrier box to form a laser array, and the laser array is used to emit a high-power laser beam to the drone to ablate the drone; The automatic rotating platform is arranged at the bottom of the carrying box, and is used to drive the carrying box to rotate so as to adjust the emission direction of the high-power laser beam; The high-speed camera and the infrared camera are both arranged near the high-energy laser array assembly, the high-speed camera is used to capture images of the test process, and the infrared camera is used to capture a heat distribution diagram of the UAV when it is ablated; The laser sight is arranged on the top of the carrying box, and is used for emitting a sighting laser parallel to the high-power laser beam to detect the UAV.

8. The array-type high-energy laser anti-UAV test device according to claim 7 is characterized in that: The high-energy laser array assembly also includes a plurality of water-cooled radiators, which are in contact with the corresponding high-power lasers and are used to dissipate heat from the high-power lasers.

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