High-precision directional diagram acquisition method, direction finding verification method and device

Abstract

The invention provides a high-precision directional diagram acquisition method and device and a direction finding verification method and device, and the method comprises the steps: fixedly installing electronic warfare equipment on a rotary table, taking the center of the rotary table as an original point, and arranging a radiation source in the normal direction of the array surface of the electronic warfare equipment; calibrating the vertical distance from the radiation source to the electronic warfare equipment, and measuring the distance from the center of the antenna array to the center of the turntable; calculating an angle correction model of the rotation angle of the turntable and the incident angle of the radiation source signal relative to the antenna array by measuring the distance from the center of the antenna array to the center of the turntable; the electronic warfare equipment is controlled to work normally, radiation source parameters are adjusted, and the rotary table is controlled to rotate to obtain directional diagram data of the electronic warfare equipment; correcting the directional diagram data by using the angle correction model; and completing direction finding verification based on the corrected directional diagram data. According to the invention, the angular deviation caused by misalignment of the antenna array center of the equipment and the center of the turntable is eliminated, high-precision directional diagram data is obtained, and the direction finding performance of the electronic warfare equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of airborne electronic warfare technology, and in particular to a high-precision pattern acquisition method, direction finding verification method, and apparatus. Background Technology

[0002] High-precision direction finding of radiation source targets is crucial for the operational effectiveness of airborne electronic warfare equipment. Airborne electronic warfare equipment employing amplitude-comparison direction finding requires the acquisition of accurate radiation pattern data within the reconnaissance airspace to achieve high-performance direction finding capabilities. After installation, the sheer size of the aircraft and the complexity of the environment make on-site radiation pattern data acquisition difficult. Therefore, traditional airborne electronic warfare equipment typically acquires radiation pattern data in a microwave anechoic chamber: the equipment is mounted and fixed on a turntable, with the center of the antenna array coinciding with the turntable's center. The radiation source is positioned and radiates a signal. By controlling the turntable's azimuth rotation, radiation pattern data is acquired, and direction finding performance is verified. The center of the antenna array of electronic warfare equipment generally does not coincide with its center of gravity, especially for electronic warfare pod-based equipment, where there is a significant distance deviation between the antenna array center and the center of gravity. To ensure the stability and reliability of electronic warfare equipment mounted on the turntable, in actual engineering, the center of gravity of the equipment is located at the center of the turntable. It is difficult to ensure that the center of the equipment's antenna array coincides with the center of the turntable. This results in an angular deviation between the rotation angle of the turntable and the incident angle of the radiation source signal relative to the antenna array. On the one hand, this leads to errors in the collected radiation pattern data, affecting the direction-finding performance of the electronic warfare equipment. On the other hand, it also makes it difficult to accurately test and verify the direction-finding performance of the equipment in a microwave anechoic chamber. Summary of the Invention

[0003] This application provides a high-precision orientation pattern acquisition method, direction finding verification method, and apparatus to address the problems in the background art.

[0004] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0005] According to a first aspect of the embodiments of this application, a high-precision radiation pattern acquisition method is provided, comprising: Electronic warfare equipment is fixedly mounted on a turntable, and radiation sources are arranged with the center of the turntable as the origin and the normal direction of the electronic warfare equipment's array surface. The center of the electronic warfare equipment coincides with the center of the turntable. Using distance measuring instruments, the vertical distance from the radiation source to the electronic warfare equipment is calibrated, and the distance from the center of the antenna array to the center of the turntable is measured. An angle correction model for the rotation angle of the turntable and the incident angle of the radiation source signal relative to the antenna array is calculated by measuring the distance from the center of the antenna array to the center of the turntable. Control the electronic warfare equipment to operate normally, adjust the radiation source parameters, and control the turntable to rotate and acquire the radiation pattern data of the electronic warfare equipment; An angle correction model is used to correct the radiation pattern data, thereby correcting the radiation pattern deviation caused by the misalignment of the antenna array center and the turntable center.

[0006] According to one embodiment of this application, the distance between the electronic warfare equipment and the radiation source satisfies the far-field condition of the electromagnetic field.

[0007] According to one embodiment of this application, the angle correction model calculation process is as follows: Measure the distance from the radiation source to the center of gravity of the electronic warfare equipment, and the angle of incidence of the radiation source relative to the antenna array of the electronic warfare equipment. Calculate the deviation angle between the incident angle of the radiation source and the initial angle of the turntable; By rotating the turntable at any angle, the coordinates of the radiation source in the coordinate system with the center of the electronic warfare equipment as the origin can be calculated. Obtain the coordinate transformation matrix from the coordinate system with the center of the electronic warfare equipment as the origin to the coordinate system with the center of the electronic warfare equipment antenna array as the origin; The coordinates of the radiation source in the coordinate system with the center of the electronic warfare equipment antenna array as the origin are determined according to the coordinate transformation matrix. The angle of incidence of the radiation source relative to the center of the electronic warfare equipment antenna array is calculated based on the coordinates of the radiation source in the coordinate system with the center of the electronic warfare equipment antenna array as the origin. This is the angle correction model.

[0008] According to one embodiment of this application, the angle correction model expression is:

[0009] in, The corrected angle. The rotation angle of the turntable. The distance from the radiation source to the center of gravity of the electronic warfare equipment. The angle of incidence of the radiation source relative to the antenna array of the electronic warfare equipment. Let [M, N] be the initial angle of the turntable, and let [M, N] be the coordinates of the center of the electronic warfare equipment's antenna array in a coordinate system with the center of gravity of the electronic warfare equipment as the origin.

[0010] According to a second aspect of this application, a direction finding verification method is provided, implemented based on the high-precision radiation pattern acquisition method described in the first aspect, specifically including: The corrected radiation pattern data is used to generate a direction finding reference load for electronic warfare equipment. Adjust the radiation source parameters and turntable rotation angle, and control the operation of electronic warfare equipment to obtain direction finding results; An angle correction model was used to correct the angle of the turntable, and the direction finding results of the electronic warfare equipment were verified.

[0011] According to one embodiment of this application, the verification of the direction finding results of electronic warfare equipment includes: Within the airspace, the radiation source is placed in another location, and the angle of incidence of the radiation source relative to the antenna array is determined using an angle calibration device with the antenna array of the electronic warfare equipment as the center. The direction finding results of the electronic warfare equipment are then verified using this angle of incidence. Simultaneously, the direction finding deviation of the electronic warfare equipment to the radiation source is calculated, the accurate angle is calculated using the direction finding deviation, and the radiation pattern data is corrected. The direction finding results are then obtained again based on the corrected radiation pattern data. This process is repeated until the obtained direction finding results are free of deviation, thus completing the direction finding verification of the electronic warfare equipment.

[0012] According to one embodiment of this application, the verification of the direction finding results of electronic warfare equipment further includes: Using an angle calibration device, with the antenna array of the electronic warfare equipment as the center, the precise incident angle of the radiation source relative to the antenna array is calibrated. Combined with the measurement results of the radiation source by the electronic warfare equipment, the direction finding results of the electronic warfare equipment are verified. Simultaneously, the direction finding deviation of the electronic warfare equipment to the radiation source is calculated, the accurate angle is calculated using the direction finding deviation, and the angle correction model is updated and iterated. New radiation pattern data is obtained through the updated angle correction model, and the direction finding results are obtained again using the new radiation pattern data. This process is repeated until the obtained direction finding results have no deviation, thus completing the direction finding verification of the electronic warfare equipment.

[0013] According to a third aspect of this application, a radiation pattern acquisition apparatus is provided for implementing the high-precision radiation pattern acquisition method described in the first aspect, the apparatus comprising: Turntable; Electronic warfare equipment, wherein the electronic warfare equipment is mounted on the turntable and the center of gravity of the electronic warfare equipment coincides with the center of the turntable; The radiation source is positioned along the normal direction of the electronic warfare equipment's array surface, with the center of the turntable as the origin; the distance between the radiation source and the electronic warfare equipment satisfies the far-field condition of the electromagnetic field.

[0014] According to a fourth aspect of this application, a radiation pattern acquisition apparatus is provided for implementing the direction finding verification method described in the second aspect, the apparatus comprising: Turntable; Electronic warfare equipment, wherein the electronic warfare equipment is mounted on the turntable and the center of gravity of the electronic warfare equipment coincides with the center of the turntable; The radiation source is positioned along the normal direction of the electronic warfare equipment's array surface, with the center of the turntable as the origin; the distance between the radiation source and the electronic warfare equipment satisfies the far-field condition of the electromagnetic field.

[0015] Compared with existing technologies, the beneficial effects of adopting the above technical solution are as follows: 1. To address the issue of bias in radiation pattern data when airborne electronic warfare equipment acquires radiation pattern data in a microwave anechoic chamber, a high-precision radiation pattern acquisition technology is adopted to eliminate the angular deviation caused by the misalignment between the center of the equipment's antenna array and the center of the turntable, thereby acquiring high-precision radiation pattern data and improving the direction finding performance of the electronic warfare equipment. 2. Accurate testing and verification of the direction-finding performance of electronic warfare equipment was achieved in a microwave anechoic chamber. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0017] Figure 1 This is a flowchart of the high-precision orientation pattern acquisition method proposed in the embodiments of this application.

[0018] Figure 2 This is a flowchart of the direction finding verification method proposed in the embodiments of this application.

[0019] Figure 3 This is a schematic diagram of the high-precision orientation pattern device proposed in the embodiments of this application.

[0020] Figure 4 This is a schematic diagram of the direction finding verification device proposed in the embodiments of this application.

[0021] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0022] The embodiments of this application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar modules or modules having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. Rather, the embodiments of this application include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0023] Example 1 To address the issue that when airborne electronic warfare equipment acquires radiation pattern data in a microwave anechoic chamber, it is difficult to ensure that the center of the equipment's antenna array and the center of the turntable coincide on the altitude plane, resulting in angular deviations in the radiation pattern data and affecting the equipment's direction-finding performance. This application proposes a high-precision radiation pattern acquisition method. By employing high-precision radiation pattern acquisition technology, the angular deviation caused by the misalignment of the projections of the equipment's antenna array center and the turntable center on the altitude plane is eliminated, thus obtaining the incident angle of the radiation source signal relative to the center of the equipment's antenna array. Please refer to... Figure 1 The specific steps are as follows: S101. The electronic warfare equipment is fixedly installed on the turntable, and a radiation source is arranged with the center of the turntable as the origin and the normal direction of the electronic warfare equipment array surface. The center of the electronic warfare equipment coincides with the center of the turntable.

[0024] In this step, the distance between the electronic warfare equipment and the radiation source needs to meet the far-field electromagnetic field conditions.

[0025] S102. Using a distance measuring instrument, calibrate the vertical distance from the radiation source to the electronic warfare equipment, and measure the distance from the center of the antenna array to the center of the turntable.

[0026] S103. Calculate the rotation angle of the turntable and the angle correction model of the incident angle of the radiation source signal relative to the antenna array by measuring the distance from the center of the antenna array to the center of the turntable.

[0027] Specifically, this embodiment provides the detailed calculation process of the angle correction model, as follows: Please refer to Figure 2 The center of gravity G of the electronic warfare equipment coincides with the center Z of the turntable, and the initial rotation angle of the turntable is... The distance from radiation source A to the center of gravity G of the electronic warfare equipment is measured using a distance measuring instrument, and the angle of incidence of radiation source A relative to the antenna array of the electronic warfare equipment is measured using an angle measuring instrument. The deviation between the incident angle of the radiation source and the initial angle of the turntable for: (1) When the turntable rotates at any angle... When this happens, the coordinates of radiation source A in a coordinate system with the centroid G as the origin can be calculated. , ]for: (2) By measuring the coordinates of the antenna array center O in a coordinate system with the electronic warfare equipment's center of gravity G as the origin using a distance measuring instrument, we can obtain the coordinate transformation matrix T as [M, N]. (3) Based on the principle of coordinate transformation, the coordinates of radiation source A in the coordinate system with the center O of the antenna array as the origin can be obtained as [ , ]for: (4) Substituting equation (2) into equation (4), we simplify to obtain: (5) According to equation (5), the incident angle of radiation source A relative to the center of the electronic warfare equipment antenna array can be obtained, i.e., the angle correction model expression: (6) S104. Control the electronic warfare equipment to operate normally, adjust the radiation source parameters, and control the turntable to rotate and acquire the radiation pattern data of the electronic warfare equipment.

[0028] S105. Use the angle correction model to correct the radiation pattern data, correcting the radiation pattern deviation caused by the misalignment of the antenna array center and the turntable center.

[0029] The solution in this embodiment addresses the problem of deviation in radiation pattern data when airborne electronic warfare equipment acquires radiation pattern data in a microwave anechoic chamber. By adopting a high-precision radiation pattern acquisition method, the angular deviation caused by the misalignment between the center of the equipment's antenna array and the center of the turntable is eliminated, resulting in high-precision radiation pattern data and improving the direction-finding performance of the electronic warfare equipment.

[0030] Example 2 Due to the misalignment between the center of the antenna array and the center of the turntable, there is a deviation between the rotation angle of the turntable and the incident angle of the radiation source relative to the antenna array. This results in inaccurate testing and verification of direction-finding performance during microwave anechoic chamber testing. Therefore, this embodiment utilizes the angle correction model obtained in Embodiment 1 to eliminate the angle deviation caused by the misalignment, achieving preliminary testing and verification of direction-finding performance. Based on Embodiment 1, this embodiment proposes a direction-finding verification method, please refer to... Figure 3 Specifically, it includes: S201. Generate direction-finding parameters using the corrected pattern data and load them into electronic warfare equipment; S202. Adjust the radiation source parameters and turntable rotation angle, and control the operation of electronic warfare equipment to obtain direction finding results; S203. The angle of the turntable is corrected using the angle correction model, and the direction finding results of the electronic warfare equipment are verified.

[0031] In one embodiment of this application, a method for verifying the direction-finding results of electronic warfare equipment is proposed, comprising: Please refer to Figure 4Within the airspace, the radiation source is placed at another location B. Using an angle calibration device with the antenna array of the electronic warfare equipment as the center, the incident angle of the radiation source relative to the antenna array is calibrated. Since this angle is an accurate incident angle and is not affected by the misalignment between the center of the antenna array and the center of the turntable, the direction finding results of the electronic warfare equipment can be verified using this incident angle.

[0032] Simultaneously, the direction finding deviation of the electronic warfare equipment to the radiation source is calculated, and accurate angle correction radiation pattern data is obtained using the direction finding deviation. The direction finding results are then re-acquired based on the corrected radiation pattern data. This process is repeated until the acquired direction finding results are free of deviation, thus completing the direction finding verification of the electronic warfare equipment.

[0033] Furthermore, in another embodiment, a method for verifying the direction-finding results of electronic warfare equipment is also proposed, including: Using an angle calibration device, with the antenna array of the electronic warfare equipment as the center, the precise incident angle of the radiation source relative to the antenna array is calibrated. Combined with the measurement results of the radiation source by the electronic warfare equipment, the direction finding results of the electronic warfare equipment are verified. Simultaneously, the direction finding deviation of the electronic warfare equipment to the radiation source is calculated. The accurate angle is calculated using the direction finding deviation to update the angle correction model. New radiation pattern data is obtained through the updated angle correction model. The direction finding results are then obtained again using the new radiation pattern data. This process is repeated until the obtained direction finding results are free of deviation, thus completing the direction finding verification of the electronic warfare equipment.

[0034] The solution in this embodiment can achieve high-precision pattern acquisition and direction finding verification of electronic warfare equipment.

[0035] Example 3 This embodiment provides a radiation pattern acquisition device for implementing the high-precision radiation pattern acquisition method described in Embodiment 1. Please refer to [link / reference needed]. Figure 3 Or 4, the device includes: Turntable; Electronic warfare equipment, wherein the electronic warfare equipment is mounted on the turntable and the center of gravity of the electronic warfare equipment coincides with the center of the turntable; The radiation source is positioned along the normal direction of the electronic warfare equipment's array surface, with the center of the turntable as the origin; the distance between the radiation source and the electronic warfare equipment satisfies the far-field condition of the electromagnetic field.

[0036] Example 4 This embodiment proposes a direction pattern acquisition device for implementing the direction finding verification method described in Embodiment 2. This device is the same as the device in Embodiment 3; please refer to [reference needed]. Figure 3 Or 4, the device includes: Turntable; Electronic warfare equipment, wherein the electronic warfare equipment is mounted on the turntable and the center of gravity of the electronic warfare equipment coincides with the center of the turntable; The radiation source is positioned along the normal direction of the electronic warfare equipment's array surface, with the center of the turntable as the origin; the distance between the radiation source and the electronic warfare equipment satisfies the far-field condition of the electromagnetic field.

[0037] Based on the same technical concept, this application also provides an electronic device that can implement the high-precision orientation pattern acquisition method and direction finding verification method provided in the above embodiments of the present invention. In one embodiment, the electronic device is implemented as a display and control device, such as... Figure 4 As shown, the electronic device may include: At least one processor and a memory connected to the at least one processor. In this embodiment of the invention, the specific connection medium between the processor and the memory is not limited. Figure 4 The example used is the connection between the processor and memory via a bus. The bus... Figure 4 The connections between other components are indicated by thick lines and are for illustrative purposes only, not as limiting information. Buses can be divided into address buses, data buses, control buses, etc., but for ease of representation, [the specific bus type is not shown here]. Figure 4 The processor is represented by a single thick line, but this does not imply that there is only one bus or one type of bus. Alternatively, a processor can also be called a controller; there are no restrictions on the name.

[0038] In this embodiment of the invention, the memory stores instructions executable by at least one processor. By executing the instructions stored in the memory, the at least one processor can execute the high-precision pattern acquisition method and direction-finding verification method described above. The processor can implement... Figure 4 The functions of each module in the device shown.

[0039] The processor is the control center of the device. It can connect to various parts of the control device through various interfaces and lines. By running or executing instructions stored in memory and calling data stored in memory, it can monitor the device's various functions and process data, thereby enabling overall monitoring of the device.

[0040] In an alternative design, the processor may include one or more processing units. The processor may integrate an application processor and a modem processor, wherein the application processor primarily handles the operating system, user interface, and applications, while the modem processor primarily handles wireless communication. It is understood that the modem processor may also not be integrated into the processor. In some embodiments, the processor and memory may be implemented on the same chip; in some embodiments, they may also be implemented separately on separate chips.

[0041] The processor can be a general-purpose processor, such as a CPU, digital signal processor, application-specific integrated circuit, field-programmable array, or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, capable of implementing or executing the methods, steps, and logic block diagrams disclosed in the embodiments of this invention. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the high-precision orientation pattern acquisition method and direction finding verification method disclosed in the embodiments of this invention can be directly manifested as execution by a hardware processor, or execution by a combination of hardware and software modules within the processor.

[0042] Memory, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. Memory can include at least one type of storage medium, such as flash memory, hard disk, multimedia card, card-type memory, random access memory (RAM), static random access memory (SRAM), programmable read-only memory (PROM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), magnetic memory, magnetic disk, optical disk, etc. Memory is any other medium capable of carrying or storing desired program code in the form of instructions or data structures, and accessible by a computer, but is not limited thereto. In embodiments of the present invention, memory can also be a circuit or any other device capable of implementing storage functions, used to store program instructions and / or data.

[0043] By designing and programming the processor, the code corresponding to the high-precision pattern acquisition method and direction finding verification method described in the foregoing embodiments can be embedded into the chip, enabling the chip to execute the steps of the methods described in the foregoing embodiments during operation. How to design and program the processor is a technique well-known to those skilled in the art and will not be elaborated upon here.

[0044] Based on the same inventive concept, embodiments of the present invention also provide a storage medium storing computer instructions, which, when executed on a computer, cause the computer to execute the high-precision orientation pattern acquisition method and direction finding verification method process described above.

[0045] In some optional embodiments, the present invention also provides a high-precision pattern acquisition method and direction finding verification method flow that can also be implemented in the form of a program product, which includes program code. When the program product is run on a device, the program code is used to cause the control device to perform the steps in the high-precision pattern acquisition method and direction finding verification method flow described in this specification according to various exemplary embodiments of the present invention.

[0046] It should be noted that although several units or sub-units of the apparatus have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of the invention, the features and functions of two or more units described above can be embodied in one unit. Conversely, the features and functions of one unit described above can be further divided and embodied by multiple units. Furthermore, although the operation of the method of the invention is described in a specific order in the drawings, this does not require or imply that these operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0047] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0048] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a server, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0049] Program code for performing the operations of this invention can be written using any combination of one or more programming languages, including object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0050] In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0051] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0052] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-precision pattern acquisition method, characterized by, The application relates to a high-precision direction pattern acquisition method. The method comprises the following steps: fixing electronic warfare equipment on a rotating table, arranging a radiation source in the direction of the normal line of the array surface of the electronic warfare equipment with the center of the rotating table as the origin, and the center of the electronic warfare equipment coincides with the center of the rotating table; using a distance measuring instrument to calibrate the vertical distance from the radiation source to the electronic warfare equipment and measure the distance from the center of the antenna array to the center of the rotating table; using the measured distance from the center of the antenna array to the center of the rotating table to calculate the angle correction model of the rotation angle of the rotating table and the incident angle of the radiation source signal relative to the antenna array; controlling the electronic warfare equipment to work normally, adjusting the parameters of the radiation source, and controlling the rotating table to rotate to obtain the direction pattern data of the electronic warfare equipment; and correcting the direction pattern data by using the angle correction model to correct the direction pattern deviation caused by the fact that the center of the antenna array does not coincide with the center of the rotating table. The distance between the electronic warfare equipment and the radiation source satisfies the far-field condition of an electromagnetic field. The calculation process of the angle correction model is as follows: measuring the distance from the radiation source to the center of gravity of the electronic warfare equipment and the incident angle of the radiation source relative to the antenna array surface of the electronic warfare equipment; calculating the deviation angle of the incident angle of the radiation source and the initial angle of the rotating table; rotating the rotating table by any angle to obtain the coordinates of the radiation source in the coordinate system with the center of the electronic warfare equipment as the origin; obtaining the coordinate conversion matrix from the coordinate system with the center of the electronic warfare equipment as the origin to the coordinate system with the center of the antenna array of the electronic warfare equipment as the origin; determining the coordinates of the radiation source in the coordinate system with the center of the antenna array of the electronic warfare equipment as the origin according to the coordinate conversion matrix; and calculating the incident angle of the radiation source relative to the center of the antenna array of the electronic warfare equipment according to the coordinates of the radiation source in the coordinate system with the center of the antenna array of the electronic warfare equipment as the origin, that is, the angle correction model. The expression of the angle correction model is as follows: The high-precision direction pattern acquisition method is realized according to any one of claims 1-4, and specifically comprises the following steps:

2. The high-precision pattern acquisition method according to claim 1, characterized in that, generating a direction finding parameter by using the corrected direction pattern data and loading the direction finding parameter to the electronic warfare equipment; 3. The high-precision pattern acquisition method according to claim 1 or 2, characterized by, adjusting the parameters of the radiation source and the rotating angle of the rotating table, and controlling the electronic warfare equipment to work to obtain a direction finding result; correcting the angle of the rotating table by using the angle correction model, and verifying the direction finding result of the electronic warfare equipment. The verification of the direction finding result of the electronic warfare equipment comprises the following steps: placing the radiation source at another position in a space range, using an angle calibration device to calibrate the incident angle of the radiation source relative to the antenna array of the electronic warfare equipment, and using the incident angle to complete the verification of the direction finding result of the electronic warfare equipment; simultaneously, calculating the direction finding deviation of the electronic warfare equipment to the radiation source, calculating the accurate angle by using the direction finding deviation, correcting the direction pattern data, and reacquiring the direction finding result based on the corrected direction pattern data, and repeating the above steps until the acquired direction finding result has no deviation, and the verification of the direction finding result of the electronic warfare equipment is completed. The verification of the direction finding result of the electronic warfare equipment further comprises the following steps: using the angle calibration device to calibrate the accurate incident angle of the radiation source relative to the antenna array of the electronic warfare equipment, and combining the measurement result of the electronic warfare equipment to the radiation source to complete the verification of the direction finding result of the electronic warfare equipment.

4. The high-precision pattern acquisition method according to claim 3, characterized in that, ​ wherein, is the corrected angle, is the rotation angle of the turntable, is the distance from the radiation source to the center of gravity of the electronic warfare equipment, is the incident angle of the radiation source relative to the antenna array of the electronic warfare equipment, is the initial angle of the turntable, and [M, N] is the coordinate of the center of the antenna array of the electronic warfare equipment in the coordinate system with the center of gravity of the electronic warfare equipment as the origin.

5. A direction finding verification method characterized by, ​ ​ ​ ​ 6. The direction finding verification method of claim 5, wherein, ​ ​ ​ 7. The direction finding verification method of claim 5 or 6, wherein, ​ ​ Meanwhile, the direction-finding deviation of the electronic warfare equipment to the radiation source is calculated, the accurate angle is calculated by using the direction-finding deviation, the iterative angle correction model is updated, the new direction pattern data is obtained by using the updated iterative angle correction angle model, the direction-finding result is obtained again by using the new direction pattern data, and the direction-finding verification of the electronic warfare equipment is completed by repeating the above steps until the obtained direction-finding result has no deviation.

8. A pattern acquisition apparatus characterized by comprising: The device for realizing the high-precision direction pattern acquisition method in any one of claims 1-4 comprises: a turntable; an electronic warfare equipment, which is installed on the turntable, and the center of gravity of the electronic warfare equipment coincides with the center of the turntable; a radiation source, which is arranged in the direction of the array surface normal of the electronic warfare equipment with the center of the turntable as the origin, and the distance between the radiation source and the electronic warfare equipment satisfies the far-field condition of an electromagnetic field.

9. A pattern acquisition device, characterized by The device for realizing the direction-finding verification method in any one of claims 5-7 comprises: a turntable; an electronic warfare equipment, which is installed on the turntable, and the center of gravity of the electronic warfare equipment coincides with the center of the turntable; a radiation source, which is arranged in the direction of the array surface normal of the electronic warfare equipment with the center of the turntable as the origin, and the distance between the radiation source and the electronic warfare equipment satisfies the far-field condition of an electromagnetic field.

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