A dynamically variable radar cross section simulation device and control method

Abstract

This invention relates to the field of target characteristic radar measurement technology, specifically to a dynamically variable radar cross section simulation device and control method, comprising a base, a support mechanism, a lifting mechanism, a rotating mechanism, a tilting mechanism, and a limiting mechanism. The support mechanism is fixed to the base. The reflector of the lifting mechanism extends from the inside to the outside of the support mechanism, and the reflector of the lifting mechanism can be raised and lowered relative to the base. The rotating mechanism is installed on top of the support mechanism and is used to drive the lifting mechanism to rotate around a rotation axis perpendicular to the ground. The tilting mechanism is installed inside the support mechanism and is used to adjust the pitch angle of the reflector. The limiting mechanism is installed inside the support mechanism and is used to limit the lifting movement of the lifting mechanism. This invention can improve the adjustment flexibility of radar wave reflectors.

Description

Technical Field

[0001] This invention relates to the field of target characteristic radar measurement technology, and specifically to a dynamically variable radar cross section simulation device and control method. Background Technology

[0002] Trihedral corner reflectors are characterized by relative stability, a large radar cross-section, and minimal variation in the radar cross-section over a wide angular range. They are generally used as standards for calibration and quantitative measurement.

[0003] Currently, different targets need to be simulated during the radar measurement of target characteristics.

[0004] Installing these radar wave reflectors with different side lengths not only requires adjusting the angle to change their size, but the process is also complex and costly, and they cannot be quickly replaced within a specified time. Furthermore, the manufacturing of these radar wave reflectors with different side lengths is limited by precision, and wear and tear after use will affect the accuracy of calibration and quantitative measurement results. Summary of the Invention

[0005] In view of the above problems, the present invention provides a dynamically variable radar cross section simulation device and control method, which solves the technical problem that radar wave reflectors cannot be flexibly adjusted in the prior art.

[0006] On one hand, the present invention provides a dynamically variable radar cross section simulation device, comprising:

[0007] The system comprises a base 1, a support mechanism 2, a lifting mechanism 3, a rotating mechanism 4, a tilting mechanism 5, and a limiting mechanism 6. The support mechanism 2 is fixed to the base 1. The reflector 308 of the lifting mechanism 3 extends from the inside to the outside of the support mechanism 2, and the reflector 308 of the lifting mechanism 3 can be raised or lowered relative to the base 1. The rotating mechanism 4 is installed on the top of the support mechanism 2 and is used to drive the lifting mechanism 3 to rotate around a rotation axis perpendicular to the ground. The tilting mechanism 5 is installed inside the support mechanism 2 and is used to adjust the pitch angle of the reflector 308. The limiting mechanism 6 is installed inside the support mechanism 2 and is used to limit the lifting movement of the lifting mechanism 3.

[0008] Preferably, the lifting mechanism 3 includes a fixed platform 301, a support block 302, a first motor 303, a first gear 304, a lifting platform 305, a rack and pinion 306, a support rod 307, and a reflector 308; the fixed platform 301 is installed on the top of the support mechanism 2 in conjunction with the rotating mechanism 4, and the support block 302 is fixedly installed on one side of the fixed platform 301 inside the support mechanism 2. The first motor 303 is installed at the lower end of the support block 302, and the first gear 304 is installed at the output end of the first motor 303.

[0009] A reflector 308 is connected to the top of the lifting platform 305, and a rack 306 is connected to the bottom of the lifting platform 305. Multiple support rods 307 are connected between the rack 306 and the lifting platform 305.

[0010] The fixed platform 301 is provided with a cross-shaped sliding hole, and the reflector 308 extends out of the fixed platform 301 through the cross-shaped sliding hole;

[0011] The first gear 304 and the rack 306 cooperate to drive the rack 306 to move the lifting platform 305 and the reflector 308 up and down when the first motor 303 rotates.

[0012] Preferably, the reflector 308 includes a non-tilted reflector 3081 and a tiltable reflector 3082. The non-tilted reflector 3081 has a long reflective surface and a short reflective surface that are perpendicular to each other. The tiltable reflector 3082 is rotatably connected to the non-tilted reflector 3081 through a bearing 502. The reflective surface of the tiltable reflector 3082 is perpendicular to the long reflective surface of the non-tilted reflector 3081.

[0013] Preferably, the rotating mechanism 4 includes a second motor 401, a second gear 402, a surrounding tooth 403, a circular groove 404, and a slider 405. The edge of the fixed platform 301 is surrounded by the surrounding tooth 403, and multiple sliders 405 are installed extending from the edge of the fixed platform 301, with the sliders 405 above the surrounding tooth 403. The second motor 401 is fixed to the housing 201 of the support mechanism 2, and the output end of the second motor 401 is provided with a second gear 402, which cooperates with the surrounding tooth 403. The top of the housing 201 of the support mechanism 2 is provided with a circular groove 404, and the slider 405 is embedded in the circular groove 404.

[0014] Preferably, the tilting mechanism 5 includes an electric push rod 501, a bearing 502, a limiting groove 503, a baffle 504, a support spring 505, a push plate 506, and a blocking block 507. The electric push rod 501 is fixedly installed on the lower surface of the fixed platform 301, and the output end of the electric push rod 501 contacts the tiltable reflector 3082. The baffle 504 is fixed on the lifting platform 305, and the lifting platform 305 has a limiting groove 503. The push plate 506 is slidably connected to the limiting groove 503. The push plate 506 is connected to the baffle 504 through the support spring 505. The limiting groove 503 is provided with a blocking block 507 to limit the sliding range of the push plate 506. The push plate 506 contacts the tiltable reflector 3082.

[0015] Preferably, the limiting mechanism 6 includes a limiting post 603 and a support plate 604. A plurality of spring steel balls 602 are distributed on the limiting post 603. An annular fixing groove 601 is provided around the edge of the lifting platform 305, and the spring steel balls 602 are provided in the fixing groove 601. The spring steel balls 602 can cooperate with the annular fixing groove 601. When the spring steel balls 602 extend into the fixing groove 601, they can limit the lifting and lowering movement of the lifting platform 305.

[0016] Preferably, the position of the spring steel ball 602 on the limiting post 603 is determined by the standard calibration body size of the high-precision radar wave reflector.

[0017] Preferably, the support mechanism 2 includes a housing 201, on which a plurality of placement slots 202 are provided. A rotating shaft 204 is provided in the lower end of the placement slot 202. A support leg 205 is placed in the placement slot 202. The rotating shaft 204 passes through the lower end of the support leg 205, so that the support leg 205 is rotatably connected to the housing 201. A hand buckle 207 is installed on the outer wall of the support leg 205. A plurality of locking blocks 206 are provided on the two sides of the support leg 205 that are in contact with the placement slot 202. A plurality of friction blocks 203 are provided on the two side walls of the placement slot 202. The locking blocks 206 cooperate with the friction blocks 203.

[0018] On one hand, the present invention provides a control method for a dynamically variable radar cross section simulation device, comprising the following steps:

[0019] Step S1: Obtain the trajectory information of the target device to be measured, including the direction of movement and position of the target device;

[0020] Step S2: Calculate the target heading angle and target elevation angle based on the position of the dynamically variable radar cross section simulation device and the direction and position of the target equipment;

[0021] Step S3: Determine the control quantities of the second motor 401 and the electric push rod 501 based on the target orientation angle and the target pitch angle, and generate control commands based on the control quantities;

[0022] Step S4: Send the control command to the electronic control mechanism via the remote control device, and the electronic control mechanism controls the second motor 401 and the electric push rod 501 to execute the action corresponding to the control command.

[0023] Preferably, before running step S1, a step of adjusting the radar cross-section size is further included, specifically including:

[0024] The size change command is issued by the remote control device. The size change command includes the spring steel ball number. After receiving the size change command, the electric control mechanism drives the lifting mechanism through the first motor 303 to make the spring steel ball 602 corresponding to the number spring steel ball 602 spring into the fixed groove 601, so that the reflector 308 reaches the corresponding standard side length size.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] (1) By providing a lifting mechanism and a limiting structure, the present invention enables the reflector to be precisely adjusted in stages along the height direction, thereby realizing the graded change of the effective side length of the radar wave reflector. It can quickly switch to the size of each standard calibration body by relying on the cooperation of spring steel balls and limiting grooves, thus improving the adjustment efficiency and ease of operation.

[0027] (2) The present invention employs an integrated rotation mechanism and tilting mechanism, driven by a second motor and an electric push rod respectively, enabling the reflector to achieve 360° horizontal rotation and flexible adjustment of the pitch angle. Combined with the target equipment's trajectory information, the azimuth and pitch angles of the reflector can be remotely adjusted in real time, realizing the simulation of different radar illumination angles of the target being measured, and providing an effective technical means for high-precision RCS measurement.

[0028] (3) All major adjustment functions of the present invention are realized by electric and remote control, eliminating the tedious manual switching steps, and can automatically complete the entire process of size change, direction adjustment and other operations according to the control command, which significantly saves testing and debugging time and provides strong support for high-efficiency and high-reliability radar system testing. Attached Figure Description

[0029] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention.

[0030] Figure 1 A schematic diagram of the external shape of the dynamically variable radar cross section simulation device provided by the present invention.

[0031] Figure 2 A schematic diagram of the lifting mechanism of the dynamically variable radar cross section simulation device provided by the present invention.

[0032] Figure 3 A schematic diagram of the rotating mechanism of the dynamically variable radar cross section simulation device provided by the present invention.

[0033] Figure 4 A schematic diagram of the first part of the tilting mechanism of the dynamically variable radar cross section simulation device provided by the present invention.

[0034] Figure 5 This is a schematic diagram of the second part of the tilting mechanism of the dynamically variable radar cross section simulation device provided by the present invention.

[0035] Figure 6 A schematic diagram of the limiting mechanism of the dynamically variable radar cross section simulation device provided by the present invention.

[0036] Figure 7 A schematic diagram of the support mechanism for the dynamically variable radar cross section simulation device provided by the present invention.

[0037] Figure 8 Another schematic diagram of the limiting mechanism of the dynamically variable radar cross section simulation device provided by the present invention.

[0038] Reference numerals: 1-Base, 2-Support mechanism, 201-Outer shell, 202-Placement slot, 203-Friction block, 204-Rotating shaft, 205-Support leg, 206-Clamping block, 207-Hand buckle, 3-Lifting mechanism, 301-Fixed platform, 302-Support block, 303-First motor, 304-First gear, 305-Lifting platform, 306-Rack and pinion, 307-Support rod, 308-Reflector, 3081-Non-tilted reflector, 3082- Tiltable reflector, 4-rotation mechanism, 401-second motor, 402-second gear, 403-circular tooth, 404-circular groove, 405-slider, 5-tilting mechanism, 501-electric push rod, 502-bearing, 503-limiting groove, 504-baffle, 505-supporting spring, 506-push plate, 507-blocking block, 6-limiting mechanism, 601-fixed groove, 602-spring steel ball, 603-limiting post, 604-support plate. Detailed Implementation

[0039] To better understand the above-described objectives, features, and advantages of the present invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other. Furthermore, the present invention can be implemented in other ways different from those described herein; therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0040] The dynamically variable radar cross section simulation device provided by this invention offers a trihedral radar wave reflector with continuously variable side lengths, and the side lengths can be fixed to various specific lengths. A single device can be used to create standard calibration bodies for multiple different high-precision radar wave reflectors. Furthermore, the radar wave angle reflector of this invention can adjust its orientation according to the flight path of the measuring equipment, enabling wireless remote control adjustment and saving debugging and testing time.

[0041] To illustrate the effectiveness of the method proposed in this invention, the following detailed description of the above technical solution is provided through a specific embodiment. For example... Figures 1-7As shown, this invention discloses a dynamically variable radar cross section simulation device, including a base 1, a support mechanism 2, a lifting mechanism 3, a rotating mechanism 4, a tilting mechanism 5, and a limiting mechanism 6. The support mechanism 2 is fixed to the base 1. A portion of the lifting mechanism 3 is installed inside the support mechanism 2, and the reflector 308 of the lifting mechanism 3 extends to the outside of the support mechanism 2. The lifting mechanism 3 can be raised and lowered relative to the base 1. The rotating mechanism 4 is installed on the top of the support mechanism 2 and can drive the lifting mechanism 3 to rotate around a rotation axis perpendicular to the ground. The tilting mechanism 5 is installed inside the support mechanism 2 and can adjust the pitch angle of the reflector 308. The limiting mechanism 6 is installed inside the support mechanism 2 and can limit the lifting movement of the lifting mechanism 3.

[0042] Figure 1 A schematic diagram of the external shape of a dynamically variable radar cross section simulation device provided according to an embodiment of the present invention. Figure 2 A schematic diagram of the lifting mechanism of a radar cross section simulation device provided according to an embodiment of the present invention.

[0043] The following combination Figure 1 and Figure 2 The lifting mechanism 3 of the present invention will be described. The lifting mechanism 3 includes a fixed platform 301, a support block 302, a first motor 303, a first gear 304, a lifting platform 305, a rack and pinion 306, a support rod 307, and a reflector 308. The fixed platform 301 is installed on top of the support mechanism 2 in conjunction with the rotating mechanism 4. The horizontal height of the fixed platform 301 is fixed, forming the top surface of the radar cross section simulation device, serving as one of the three surfaces reflecting radar waves. The support block 302 is fixedly installed on one side of the fixed platform 301 inside the support mechanism 2. The first motor 303 is installed at the lower end of the support block 302, and the first gear 304 is installed at the output end of the first motor 303.

[0044] A reflector 308 is connected to the top of the lifting platform 305, and a rack 306 is connected to the bottom of the lifting platform 305. Multiple support rods 307 are connected between the rack 306 and the lifting platform 305.

[0045] In some embodiments, one end of each of the plurality of support rods 307 is connected to the same point on the rack 306, and the other end is connected to different points on the bottom of the lifting platform 305. This connection method improves the stability of the rack 306 in supporting the lifting platform 305 during lifting and moving.

[0046] The reflector 308 includes a non-tilted reflector 3081 and a tiltable reflector 3082. The non-tilted reflector 3081 has a long reflective surface and a short reflective surface that are perpendicular to each other. A bearing 502 is provided on the long reflective surface of the non-tilted reflector 3081. The tiltable reflector 3082 is rotatably connected to the non-tilted reflector 3081 through the bearing 502. The reflective surface of the tiltable reflector 3082 is perpendicular to the long reflective surface of the non-tilted reflector 3081 and can rotate about a rotation axis perpendicular to the long reflective surface of the non-tilted reflector 3081 through the bearing 502. The non-tilted reflector 3081 and the tiltable reflector 3082 together form a cross-shaped reflector 308.

[0047] The surfaces of the non-tilted reflector 3081, the tiltable reflector 3082, and the fixed platform 301 together constitute the three surfaces that reflect radar waves.

[0048] In some embodiments, the tops of the non-tilted reflector 3081 and the tiltable reflector 3082 can be either pointed or horizontal, depending on the requirements.

[0049] The fixed platform 301 has a cross-shaped sliding hole, through which the reflector 308 extends to the outside of the fixed platform 301.

[0050] The first gear 304 and the rack 306 are meshed together. When the first motor 303 rotates, it drives the rack 306 to move the lifting platform 305 and the reflector 308 up and down.

[0051] The lifting mechanism of this invention drives the rack and pinion 306 via a first motor 303, enabling the smooth lifting and lowering of the lifting platform 305 and its top cross-shaped reflector 308, thereby allowing the height of the reflective surface to change continuously as needed. By adjusting the position of the lifting platform 305, the spatial dimensions of the trihedral shape corresponding to the reflector 308 can be effectively changed, achieving dynamic and continuous adjustment of the side lengths of the three mutually perpendicular reflective surfaces. This allows for flexible provision of radar wave reflection trihedrals with different side lengths, and the adjustment of its radar cross section (RCS) parameter as needed. This enables dynamic adjustment of the reflector size and its RCS through simple mechanical and electronic control operations in applications such as radar calibration, target simulation, and radar system testing, improving the flexibility and efficiency of the application.

[0052] Figure 3 A schematic diagram of the rotating mechanism of a radar cross section simulation device provided according to an embodiment of the present invention.

[0053] The following combination Figure 3The rotating mechanism 4 of the present invention will be described. The rotating mechanism 4 includes a second motor 401, a second gear 402, a surrounding tooth 403, a circular groove 404, and a slider 405. The edge of the fixed platform 301 is provided with the surrounding tooth 403, and a plurality of sliders 405 are installed extending from the edge of the fixed platform 301, the sliders 405 being above the surrounding tooth 403; the second motor 401 is fixed to the housing 201 of the support mechanism 2, and the output end of the second motor 401 is provided with a second gear 402, which cooperates with the surrounding tooth 403; the top of the housing 201 of the support mechanism 2 is provided with a circular groove 404, and the slider 405 is embedded in the circular groove 404.

[0054] When the second motor 401 rotates, it drives the surrounding gear 403 to rotate the fixed platform 301, which in turn causes the reflector 308 to rotate as well, thereby changing the direction of the radar wave reflection trihedral angle.

[0055] Through the above-described device, the present invention can dynamically and variably adjust the azimuth angle of the radar corner reflector. The device can adjust the azimuth angle of the radar corner reflector in a timely manner according to specific test requirements, such as changes in the trajectory and spatial orientation of the target device, ensuring that its reflecting surface always maintains optimal alignment with the target radar beam or measurement angle.

[0056] Figure 4 and Figure 5 The tilting mechanism of the radar cross section simulation device is shown below. Figure 4 and Figure 5 The tilting mechanism 5 of the present invention will be described.

[0057] The tilting mechanism 5 includes an electric push rod 501, a bearing 502, a limiting groove 503, a baffle 504, a support spring 505, a push plate 506, and a blocking block 507. The electric push rod 501 is fixedly installed on the lower surface of the fixed platform 301. The output end of the electric push rod 501 contacts the tiltable reflector 3082. The tiltable reflector 3082 is rotatably connected to the non-tilted reflector 3081 through the bearing 502. The baffle 504 is fixed on the fixed platform 301. The fixed platform 301 has a limiting groove 503. The push plate 506 is slidably connected to the limiting groove 503. The push plate 506 is connected to the baffle 504 through the support spring 505. The limiting groove 503 also has a blocking block 507 to limit the sliding range of the push plate 506. The push plate 506 contacts the tiltable reflector 3082 to limit the tilt angle of the tiltable reflector.

[0058] When the electric push rod 501 is working, the output end of the electric push rod 501 pushes the tiltable reflector 3082 to tilt and rotate, and drives the push plate 506 to slide in the limiting groove 503, thereby limiting and fixing the tilting rotation angle of the tiltable reflector 3082.

[0059] The tilting mechanism 5 is designed to precisely control the pitch angle of the tiltable reflector 3082 in the radar wave angle reflector. When it is necessary to adjust the spatial directivity of the reflector, the tiltable reflector 3082 can be smoothly tilted and rotated by driving the electric push rod 501. At the same time, the cooperation of the limiting groove 503, the blocking block 507, the push plate 506, and the support spring 505 can effectively limit and buffer the tilt rotation angle, ensuring the accuracy and stability of the reflector positioning and preventing it from exceeding the preset safe angle range.

[0060] Through the aforementioned structure, the equipment can adjust the pitch angle of the radar corner reflector in real time according to specific test requirements, such as changes in the trajectory, spatial azimuth, or altitude difference of the target equipment, ensuring that its reflecting surface is always optimally matched with the target radar beam or measurement angle. This adaptive pitch angle adjustment capability not only improves the corner reflection effect of the radar reflector and the intensity of radar wave energy echo, but also greatly enhances the flexibility and automation of the equipment in practical applications.

[0061] Figure 6 and Figure 8 The limiting mechanism of the radar cross section simulation device is shown below. Figure 6 and Figure 8 The limiting mechanism 6 of the present invention will be described.

[0062] The limiting mechanism 6 includes a limiting post 603 and a support plate 604. Multiple spring steel balls 602 are distributed on the limiting post 603. An annular fixing groove 601 is provided around the edge of the lifting platform 305. The spring steel balls 602 can cooperate with the annular fixing groove 601. When the spring steel balls 602 extend into the fixing groove 601, they can restrict the lifting and lowering movement of the lifting platform 305, thereby restricting the lifting and lowering movement of the reflector 308.

[0063] In some embodiments, the limiting post 603 is provided with an unlocking mechanism (not shown in the figure). The unlocking mechanism can control the extension and retraction of the spring steel ball 602. When the unlocking mechanism controls the spring steel ball 602 to pop out of the fixing groove 601, it can unlock the lifting of the lifting platform 305.

[0064] In some embodiments, the specific position of the spring steel ball 602 can be determined according to the standard calibration body size of various high-precision radar wave reflectors with specific side lengths. For various commonly used radar calibration bodies, such as trihedral reflectors with different side lengths, multiple spring steel balls 602 are correspondingly provided on the limiting post 603, each spring steel ball corresponding to the side length of the reflecting surface of a standard calibration body. When the lifting platform 305 moves to a specific height, so that the reflector 308 reaches the corresponding standard side length size, the corresponding spring steel ball 602 springs into the fixing groove 601, thereby achieving precise positioning of the height of the lifting platform 305 and the reflector 308 and fixing them at the standard size position.

[0065] This setting allows users to quickly adjust the radar reflector to various internationally recognized or custom-defined standard calibration dimensions according to measurement and testing needs. The positioning of each spring steel ball 602 is precisely measured and calibrated, ensuring repeatability and high precision when switching between standard dimensions, thereby improving the controllability and high accuracy of the radar cross section simulation device in calibration experiments and radar detection.

[0066] Figure 7 A schematic diagram of the support mechanism for a radar cross section simulation device provided according to an embodiment of the present invention.

[0067] The following combination Figure 7 The support mechanism 2 of the present invention is described below. The support mechanism 2 includes a housing 201, on which a plurality of placement slots 202 are formed. The plurality of placement slots 202 are evenly distributed. A rotating hole is formed in the inner wall of the placement slot 202, and a rotating shaft 204 is installed in the rotating hole. A support leg 205 is placed in the placement slot 202. A hole is formed through the outer wall of one end of the support leg 205. The rotating shaft 204 passes through both the placement slot 202 and the support leg 205, so that the support leg 205 is rotatably connected to the housing 201. A handle 207 is installed on the outer wall of the support leg 205.

[0068] The outer wall of the support leg 205 is equipped with multiple locking blocks 206, and the inner wall of the placement groove 202 is provided with multiple friction blocks 203, with the locking blocks 206 in contact with the friction blocks 203.

[0069] When the radar cross section simulation device needs to be raised to a higher height, pull the lever 207, and the pivot 204 rotates, thereby pulling the support leg 205 out of the placement slot 202. The locking block 206 and the friction block 203 rub against each other to fix the support leg 205 in any position, thus allowing for arbitrary height adjustment for each support leg 205. When retracting the support leg 205, the locking block 206 and the friction block 203 rub against each other to fix the support leg 205 inside the placement slot 202, thereby saving storage space. Multiple locking blocks 206 and friction blocks 203 are used, thereby extending the service life of the support mechanism 2 and reducing costs.

[0070] In some embodiments, the variable radar cross section simulation device of the present invention may include an electronic control mechanism, which may be disposed inside the support mechanism 2. The electronic control mechanism is electrically connected to the first motor 303, the second motor 401, and the electric push rod 501. The electronic control mechanism communicates with an external remote control device, such as a handheld terminal or a host computer control system, via wired / wireless means. The remote control device can issue commands in real time, and after receiving the commands, the control mechanism drives the corresponding electric components to perform actions as needed.

[0071] Specifically, the control mechanism can control the following separately:

[0072] The first motor 303 enables precise control of the lifting mechanism, drives the rack and pinion 306 to lift the lifting platform 305, thereby achieving dynamic and continuous adjustment of the spatial dimensions of the radar reflection trihedral angle.

[0073] The second motor 401 controls the rotation mechanism, driving the fixed platform 301 and the reflector 308 on it to rotate, thereby adjusting the direction angle of the reflector 308;

[0074] The electric actuator 501 enables precise control of the tilt angle of the tiltable reflector 3082 to accurately match the test requirements such as the spatial orientation or height difference of the target.

[0075] The aforementioned device enables remote integrated control of the entire radar cross section simulation device, facilitating efficient and convenient completion of the testing process.

[0076] The present invention also provides a control method for a dynamically variable radar cross section simulation device, comprising the following steps:

[0077] Step S1: Obtain the trajectory information of the target device to be measured, including the direction of movement and position of the target device;

[0078] Step S2: Calculate the target heading angle and target elevation angle based on the position of the dynamically variable radar cross section simulation device and the direction and position of the target equipment;

[0079] In some embodiments, the instantaneous relative position vector of the target device with respect to the device can be calculated based on the position coordinates of the target device and the position coordinates of the device.

[0080] Direction angle calculation: Project the above relative position vector onto the local horizontal coordinate system and calculate the angle between the projected vector and the device reference direction. This is the target direction angle that needs to be adjusted by controlling the second motor 401.

[0081] Pitch angle calculation: Calculate the angle between the relative position vector and the local horizontal plane. This angle is the original pitch angle of the radar wave incident. To achieve optimal reflection, the optimal pitch angle of the tiltable reflector 3082 needs to be optimized based on this incident angle and the geometry of the trihedral reflector, ensuring that the radar wave can be effectively reflected back to the direction of the radar receiving antenna.

[0082] Step S3: Determine the control quantities of the second motor 401 and the electric push rod 501 based on the target orientation angle and the target pitch angle, and generate control commands based on the control quantities;

[0083] Step S4: Send the control command to the electronic control mechanism via the remote control device, and the electronic control mechanism controls the second motor 401 and the electric push rod 501 to execute the action corresponding to the control command.

[0084] In some embodiments, the control method of the dynamically variable radar cross section simulation device of the present invention may further include a step of adjusting the radar cross section size before running step S1, including:

[0085] The user can issue a size change command via a remote control device. The command may include the target scattering cross-section size or the corresponding spring ball number for the side length of the trihedral reflector. After receiving the size change command, the electronic control mechanism drives the lifting mechanism via the first motor 303, causing the spring ball 602 with the corresponding number to spring into the fixing slot 601, thereby making the reflector 308 reach the corresponding standard side length size.

[0086] Through the above method, the dynamically variable radar cross section simulation device proposed in this invention can automatically, quickly, and accurately adjust the azimuth angle, elevation angle, and size of the radar reflector in real time according to the actual dynamic changes of the target under test, ensuring that the reflection performance of the device is always in the best state.

[0087] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0088] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0089] In this invention, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0090] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A dynamically variable radar cross section simulation device, characterized by, The application relates to a multifunctional solar energy reflector, which comprises a base (1), a supporting mechanism (2), a lifting mechanism (3), a rotating mechanism (4), an inclining mechanism (5) and a limiting mechanism (6), the supporting mechanism (2) is fixed on the base (1), the reflecting plate (308) of the lifting mechanism (3) extends from the inside to the outside of the supporting mechanism (2), the reflecting plate (308) of the lifting mechanism (3) can be lifted in height relative to the base (1), the rotating mechanism (4) is installed on the top of the supporting mechanism (2), the rotating mechanism (4) is used for driving the lifting mechanism (3) to rotate around a rotation shaft perpendicular to the ground, the inclining mechanism (5) is installed in the supporting mechanism (2), the inclining mechanism (5) can adjust the pitch angle of the reflecting plate (308), and the limiting mechanism (6) is installed in the supporting mechanism (2), the limiting mechanism (6) can limit the lifting movement of the lifting mechanism (3). The lifting mechanism (3) comprises a fixed table (301), a supporting block (302), a first motor (303), a first gear (304), a lifting table (305), a rack rod (306), a supporting rod (307) and a reflecting plate (308), the fixed table (301) is installed on the top of the supporting mechanism (2) in cooperation with the rotating mechanism (4), the supporting block (302) is fixedly installed on one side of the fixed table (301) in the supporting mechanism (2), the lower end of the supporting block (302) is provided with the first motor (303), and the output end of the first motor (303) is provided with the first gear (304). The lifting table (305) is connected with the reflecting plate (308) on the top, the bottom of the lifting table (305) is connected with the rack rod (306), and a plurality of supporting rods (307) are connected between the lifting table (305) and the rack rod (306). A cross sliding hole is formed in the fixed table (301), and the reflecting plate (308) extends to the outside of the fixed table (301) through the cross sliding hole. The first gear (304) and the rack rod (306) are matched, and when the first motor (303) rotates, the rack rod (306) drives the lifting table (305) and the reflecting plate (308) to move up and down. The limiting mechanism (6) comprises a limiting column (603) and a supporting plate (604), a plurality of spring steel balls (602) are dispersedly arranged on the limiting column (603), a ring-shaped fixing groove (601) is arranged around the edge of the lifting table (305), the spring steel balls (602) are arranged in the fixing groove (601), the spring steel balls (602) can be matched with the ring-shaped fixing groove (601), and when the spring steel balls (602) extend into the fixing groove (601), the lifting movement of the lifting table (305) can be limited. The reflecting plate (308) comprises a non-inclined reflecting plate (3081) and an inclinable reflecting plate (3082), the non-inclined reflecting plate (3081) has a long reflecting surface and a short reflecting surface which are perpendicular to each other, the inclinable reflecting plate (3082) is rotationally connected with the non-inclined reflecting plate (3081) through a bearing (502), and the reflecting surface of the inclinable reflecting plate (3082) is perpendicular to the long reflecting surface of the non-inclined reflecting plate (3081).

2. The dynamically variable radar cross section simulation device of claim 1, wherein, ​ 3. The dynamically variable radar cross section simulation device of claim 2, wherein, The rotating mechanism (4) comprises a second motor (401), a second gear (402), a ring gear (403), a circular sliding groove (404) and a sliding block (405). The edge of the fixed table (301) is provided with the ring gear (403), and a plurality of sliding blocks (405) are arranged on the edge of the fixed table (301) and extend outward, and the sliding blocks (405) are above the ring gear (403). The second motor (401) is fixed on the shell (201) of the supporting mechanism (2), and the output end of the second motor (401) is provided with the second gear (402), and the second gear (402) is matched with the ring gear (403). The top of the shell (201) of the supporting mechanism (2) is provided with the circular sliding groove (404), and the sliding block (405) is embedded in the circular sliding groove (404).

4. The dynamically variable radar cross section simulation device of claim 3, wherein, The tilting mechanism (5) comprises an electric push rod (501), a bearing (502), a limiting groove (503), a baffle (504), a supporting spring (505), a push plate (506) and a blocking round block (507). The electric push rod (501) is fixedly installed on the lower surface of the fixed table (301), and the output end of the electric push rod (501) is in contact with the tiltable reflector (3082). The baffle (504) is fixed on the lifting table (305), and the limiting groove (503) is formed in the lifting table (305). The push plate (506) is slidably connected with the limiting groove (503), and the push plate (506) is connected to the baffle (504) through the supporting spring (505). The limiting groove (503) is provided with the blocking round block (507) for limiting the sliding range of the push plate (506), and the push plate (506) is in contact with the tiltable reflector (3082).

5. The dynamically variable radar cross section simulation device of claim 4, wherein, The position of the spring steel ball (602) on the limiting column (603) is determined by the standard calibration size of the high-precision radar wave reflector.

6. The dynamically variable radar cross section simulation device of claim 5, wherein, The supporting mechanism (2) comprises a shell (201), a plurality of placing grooves (202) are formed in the shell (201), a rotating shaft (204) is arranged in the lower end of each placing groove (202), a supporting leg (205) is arranged in each placing groove (202), the rotating shaft (204) penetrates the lower end of the supporting leg (205), so that the supporting leg (205) is rotatably connected with the shell (201), a hand buckle (207) is arranged on the outer wall of the supporting leg (205), and a plurality of clamping blocks (206) are arranged on the two side surfaces of the supporting leg (205) which are in contact with the placing grooves (202). A plurality of friction blocks (203) are arranged on the two side walls of the placing grooves (202), and the clamping blocks (206) are matched with the friction blocks (203).

7. A control method of the dynamic variable radar cross section simulation device according to any one of claims 5-6, characterized in that, The method comprises the following steps: Step S1, obtaining the track information of the target device to be measured, including the movement direction and position of the target device; Step S2, calculating the target direction angle and target pitch angle based on the position of the dynamic variable radar scattering cross section simulation device and the movement direction and position of the target device; Step S3, determining the control amount of the second motor (401) and the electric push rod (501) from the target direction angle and the target pitch angle, and generating a control instruction from the control amount. Step S4, sending the control instruction to the electric control mechanism through the remote control device, and controlling the second motor (401) and the electric push rod (501) to execute the corresponding action of the control instruction.

8. The control method of the dynamic variable radar cross section simulation device according to claim 7, characterized in that, Before running step S1, it also includes the step of adjusting the size of the radar scattering cross section, specifically including: Through the remote control device, the size changing instruction is issued, and the size changing instruction includes the spring steel ball number. After receiving the size changing instruction, the electric control mechanism drives the lifting mechanism to act through the first motor (303), so that the spring steel ball (602) numbered pops into the fixed groove (601), so that the reflector plate (308) reaches the corresponding standard side length size.

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