A high-precision pattern acquisition method, a direction-finding verification method and device

Abstract

The application provides a high-precision pattern acquisition method, a direction-finding verification method and device, comprising the following steps: fixing and installing electronic warfare equipment on a rotary table, arranging a radiation source in the direction of the array normal of the electronic warfare equipment with the center of the rotary table as the origin; calibrating the vertical distance from the radiation source to the electronic warfare equipment, measuring the distance from the center of the antenna array to the center of the rotary table; calculating the rotation angle of the rotary table and the angle correction model of the incident angle of the radiation source signal relative to the antenna array by using the measured distance from the center of the antenna array to the center of the rotary table; controlling the electronic warfare equipment to work normally, adjusting the radiation source parameters, and controlling the rotary table to rotate to acquire the pattern data of the electronic warfare equipment; correcting the pattern data by using the angle correction model; and completing direction-finding verification based on the corrected pattern data. The application eliminates the angle deviation caused by the fact that the center of the antenna array of the equipment does not coincide with the center of the rotary table, acquires high-precision pattern data, and improves the direction-finding performance of the electronic warfare equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of airborne electronic warfare, and in particular to a high-precision pattern acquisition method and a direction-finding verification method and device. BACKGROUND

[0002] High-precision direction-finding of a radiation source target is a key to exerting the combat effectiveness of airborne electronic warfare equipment. Airborne electronic warfare equipment using an amplitude comparison direction-finding system needs to collect accurate pattern data in a reconnaissance airspace to obtain high-performance direction-finding performance. After the electronic warfare equipment is installed, due to the fact that the aircraft system is too large and the environment is complex, it is difficult to collect pattern data on site, so the traditional airborne electronic warfare equipment usually completes pattern data collection in a microwave anechoic chamber: the electronic warfare equipment is fixedly installed on a turntable, the center of the antenna array of the equipment coincides with the center of the turntable, the position of a radiation source is fixed and signals are radiated, the direction-finding performance of the electronic warfare equipment is verified by controlling the azimuth rotation of the turntable to realize the collection of pattern data. The center of the antenna array of the electronic warfare equipment generally does not coincide with the center of gravity, especially the electronic warfare pod equipment, and there is a large distance deviation between the center of the antenna array and the center of gravity. In order to ensure that the electronic warfare equipment is stably and reliably installed on the turntable, the center of gravity of the equipment is located at the center of the turntable, so it is difficult to ensure that the center of the antenna array of the equipment coincides with the center of the turntable, which causes an angle 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, leading to errors in the collected pattern data and affecting the direction-finding performance of the electronic warfare equipment, and on the other hand, also leading to the fact that it is difficult to accurately test and verify the direction-finding performance of the equipment in the microwave anechoic chamber. SUMMARY

[0003] Embodiments of the present application provide a high-precision pattern acquisition method and a direction-finding verification method and device, which are used to solve the problems in the background art.

[0004] Other characteristics and advantages of the present application will become apparent from the following detailed description, or will be learned by practice of the present application.

[0005] According to a first aspect of embodiments of the present application, a high-precision pattern acquisition method is provided, comprising:

[0006] fixing and installing the electronic warfare equipment on the turntable, 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 turntable as the origin, and the center of the electronic warfare equipment coincides with the center of the turntable;

[0007] using a distance measuring instrument to calibrate the perpendicular 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;

[0008] 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 using the measured distance from the center of the antenna array to the center of the turntable.

[0009] Controlling the electronic warfare equipment to work normally, adjusting the parameters of the radiation source, and controlling the rotation of the turntable to obtain the directional diagram data of the electronic warfare equipment;

[0010] Correcting the directional diagram data by using the angle correction model, so as to correct the directional diagram deviation caused by the fact that the center of the antenna array is not coincident with the center of the turntable.

[0011] According to one embodiment of the present application, the distance between the electronic warfare equipment and the radiation source satisfies the far field condition of the electromagnetic field.

[0012] According to one embodiment of the present application, the calculation process of the angle correction model is as follows:

[0013] 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 plane of the electronic warfare equipment;

[0014] Calculating the deviation angle between the incident angle of the radiation source and the initial angle of the turntable;

[0015] Rotating the turntable by any angle, and calculating the coordinates of the radiation source in the coordinate system with the center of gravity of the electronic warfare equipment as the origin;

[0016] Obtaining the coordinate conversion matrix from the coordinate system with the center of gravity 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;

[0017] 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;

[0018] 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.

[0019] According to one embodiment of the present application, the expression of the angle correction model is as follows:

[0020]

[0021] 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 plane of the electronic warfare equipment, is the initial angle of the turntable, and [M, N] is the coordinates of the center of the antenna array plane of the electronic warfare equipment in the coordinate system with the center of gravity of the electronic warfare equipment as the origin.

[0022] According to a second aspect of the present application, a direction finding verification method is provided, which is implemented based on the high-precision pattern acquisition method of the first aspect, and specifically comprises:

[0023] The direction finding result of the electronic warfare equipment is verified by using the corrected pattern data.

[0024] The radiation source parameters and the rotation angle of the turntable are adjusted, and the electronic warfare equipment is controlled to work, so as to obtain the direction finding result.

[0025] The angle of the turntable is corrected by using the angle correction model, and the direction finding result of the electronic warfare equipment is verified.

[0026] According to an embodiment of the present application, the verification of the direction finding result of the electronic warfare equipment comprises:

[0027] The radiation source is placed at another position in the space range, the angle calibration device is used to calibrate the incident angle of the radiation source relative to the antenna array of the electronic warfare equipment, and the verification of the direction finding result of the electronic warfare equipment is completed by using the incident angle.

[0028] 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 pattern data is corrected, the direction finding result is re-acquired based on the corrected pattern data, and the cycle is repeated until there is no deviation in the acquired direction finding result, so as to complete the direction finding verification of the electronic warfare equipment.

[0029] According to an embodiment of the present application, the verification of the direction finding result of the electronic warfare equipment further comprises:

[0030] The angle calibration device is used to calibrate the accurate incident angle of the radiation source relative to the antenna array of the electronic warfare equipment, and the verification of the direction finding result of the electronic warfare equipment is completed by combining the measurement result of the electronic warfare equipment to the radiation source.

[0031] 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 pattern data is acquired by using the updated iterative angle correction model, the direction finding result is re-acquired by using the new pattern data, and the cycle is repeated until there is no deviation in the acquired direction finding result, so as to complete the direction finding verification of the electronic warfare equipment.

[0032] According to a third aspect of the present application, a pattern acquisition device is provided, which is used to implement the high-precision pattern acquisition method of the first aspect, and the device comprises:

[0033] A turntable;

[0034] 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.

[0035] a radiation source arranged in the direction of the normal of the array plane of the electronic warfare equipment 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 an electromagnetic field.

[0036] According to a fourth aspect of the present application, a directional diagram acquisition device is provided for implementing the direction-finding verification method of the second aspect, and the device comprises:

[0037] a turntable;

[0038] an electronic warfare equipment mounted on the turntable, the center of gravity of the electronic warfare equipment coincides with the center of the turntable;

[0039] a radiation source arranged in the direction of the normal of the array plane of the electronic warfare equipment 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 an electromagnetic field.

[0040] Compared with the prior art, the beneficial effects of the above technical solutions are:

[0041] 1. For the problem that the directional diagram data is deviated when the airborne electronic warfare equipment acquires the directional diagram data in the microwave anechoic chamber, the high-precision directional diagram acquisition technology is adopted to eliminate the angle deviation caused by the non-coincidence of the center of the antenna array of the equipment and the center of the turntable, and high-precision directional diagram data is acquired, thereby improving the direction-finding performance of the electronic warfare equipment.

[0042] 2. The accurate test and verification of the direction-finding performance of the electronic warfare equipment is realized in the microwave anechoic chamber. BRIEF DESCRIPTION OF DRAWINGS

[0043] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0044] Figure 1 A high-precision directional diagram acquisition method flowchart is provided for the embodiments of the present application.

[0045] Figure 2 A direction-finding verification method flowchart is provided for the embodiments of the present application.

[0046] Figure 3 A high-precision directional diagram device schematic diagram is provided for the embodiments of the present application.

[0047] Figure 4 A direction-finding verification device schematic diagram is provided for the embodiments of the present application.

[0048] Figure 5 Fig. 1 is a structural schematic diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0049] Embodiments of the present application are described in detail below with reference to examples illustrated in the accompanying drawings, in which the same or similar numerals represent the same or similar modules or modules having the same or similar functions throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are for the purpose of explaining the present application only, and should not be understood as limiting the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0050] Embodiment 1

[0051] In order to solve the problem that it is difficult to ensure that the center of the antenna array of the airborne electronic warfare equipment coincides with the center of the turntable in the height plane projection when the equipment acquires the directional diagram data in the microwave anechoic chamber, resulting in angle deviation of the directional diagram data affecting the equipment direction finding performance, the present embodiment proposes a high-precision directional diagram acquisition method. By using high-precision directional diagram acquisition technology, the angle deviation caused by the non-coincidence of the center of the antenna array of the equipment and the center of the turntable in the height plane projection is eliminated, and the incident angle of the radiation source signal relative to the center of the antenna array of the equipment is obtained. Please refer to Figure 1 , the specific steps are as follows:

[0052] S101, fix and install the electronic warfare equipment on the turntable, arrange the radiation source in the direction of the normal line of the array plane of the electronic warfare equipment with the center of the turntable as the origin, and the center of the electronic warfare equipment coincides with the center of the turntable.

[0053] In this step, the distance between the electronic warfare equipment and the radiation source needs to meet the far-field condition of the electromagnetic field.

[0054] S102, use 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 turntable.

[0055] S103, calculate the angle correction model of the rotation angle of the turntable and the incident angle of the radiation source signal relative to the antenna array using the measured distance from the center of the antenna array to the center of the turntable.

[0056] Specifically, the specific angle correction model calculation process is given in the present embodiment, which is as follows:

[0057] 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 the radiation source A to the center of gravity G of the electronic warfare equipment is measured by a distance measuring instrument, and the incident angle of the radiation source A relative to the antenna array plane of the electronic warfare equipment is measured by an angle measuring instrument The deviation of the incident angle of the radiation source from the initial angle of the turntable is:

[0058] (1)

[0059] When the arbitrary rotation angle of the turntable is , the coordinates of the radiation source A in the coordinate system with the center of gravity G as the origin can be calculated as , ] are:

[0060] (2)

[0061] The coordinates of the center O of the antenna array in the coordinate system with the center of gravity G of the electronic warfare equipment as the origin are measured by the distance measuring instrument as [M, N], and the coordinate conversion matrix T can be obtained as:

[0062] (3)

[0063] According to the coordinate conversion principle, the coordinates of the radiation source A in the coordinate system with the center O of the antenna array as the origin can be obtained as , ] are:

[0064] (4)

[0065] Substituting equation (2) into equation (4), the simplified equation is:

[0066] (5)

[0067] According to equation (5), the incident angle of the radiation source A relative to the center of the antenna array of the electronic warfare equipment can be obtained, that is, the angle correction model expression:

[0068] (6)

[0069] S104, control the electronic warfare equipment to work normally, adjust the radiation source parameters, and control the rotation of the turntable to obtain the directional diagram data of the electronic warfare equipment.

[0070] S105, correct the directional diagram data using the angle correction model to correct the directional diagram deviation caused by the non-coincidence of the center of the antenna array and the center of the turntable.

[0071] Through the scheme of the embodiment, for the problem of directional diagram data deviation when the airborne electronic warfare equipment obtains the directional diagram data in the microwave anechoic chamber, a high-precision directional diagram obtaining method is adopted to eliminate the angle deviation caused by the non-coincidence of the center of the antenna array and the center of the turntable of the equipment, and high-precision directional diagram data is obtained, which improves the direction finding performance of the electronic warfare equipment.

[0072] Embodiment 2

[0073] Due to the fact that the center of the antenna array does not coincide with the center of the turntable, there is a deviation between the angle of rotation of the turntable and the angle of incidence of the radiation source relative to the antenna array, which results in that the direction finding performance cannot be accurately tested and verified when testing in the microwave anechoic chamber. Based on this, the angle correction model obtained in Embodiment 1 is used to eliminate the angle deviation caused by the non-coincidence of the centers, so as to realize the preliminary test and verification of the direction finding performance. Based on Embodiment 1, a direction finding verification method is provided, please refer to Figure 3 , which specifically comprises:

[0074] S201, generating direction finding parameters by using the corrected directional diagram data and loading the direction finding parameters to the electronic warfare equipment;

[0075] S202, adjusting the parameters of the radiation source and the angle of rotation of the turntable, and controlling the electronic warfare equipment to work, so as to obtain the direction finding result;

[0076] S203, correcting the angle of the turntable by using the angle correction model, and verifying the direction finding result of the electronic warfare equipment.

[0077] In an embodiment of the present application, a direction finding result verification method of electronic warfare equipment is provided, which comprises:

[0078] Please refer to Figure 4 , the radiation source is placed at another position B in the space range, and the angle calibration device is used to calibrate the angle of incidence of the radiation source relative to the antenna array with the antenna array of the electronic warfare equipment as the center. Since the angle is the accurate angle of incidence, it is not affected by the non-coincidence of the center of the antenna array and the center of the turntable, and the direction finding result verification of the electronic warfare equipment can be completed by using the angle of incidence.

[0079] Meanwhile, the direction finding deviation of the electronic warfare equipment to the radiation source is calculated, the accurate angle correction directional diagram data is obtained by using the direction finding deviation, and the direction finding result is re-obtained based on the corrected directional diagram data, so as to cycle until there is no deviation in the obtained direction finding result, and the direction finding verification of the electronic warfare equipment is completed.

[0080] Further, in another embodiment, a direction finding result verification method of electronic warfare equipment is also provided, which comprises:

[0081] The angle calibration device is used to calibrate the accurate angle of incidence of the radiation source relative to the antenna array with the antenna array of the electronic warfare equipment as the center, and the direction finding result verification of the electronic warfare equipment is completed in combination with the measurement result of the electronic warfare equipment to the radiation source;

[0082] 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 to update the iterative angle correction model, the new direction pattern data is obtained by updating the angle correction angle model after iteration, and 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 the cycle until the direction-finding result obtained has no deviation.

[0083] By the scheme of the embodiment, the high-precision direction pattern acquisition and direction-finding verification of the electronic warfare equipment can be realized.

[0084] Embodiment 3

[0085] The embodiment provides a direction pattern acquisition device for realizing the high-precision direction pattern acquisition method in the embodiment 1, please refer to Figure 3 or 4, the device comprises:

[0086] A turntable;

[0087] An electronic warfare equipment, the electronic warfare equipment is installed on the turntable, and the center of gravity of the electronic warfare equipment coincides with the center of the turntable;

[0088] A radiation source, 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 the electromagnetic field.

[0089] Embodiment 4

[0090] The embodiment provides a direction pattern acquisition device for realizing the direction-finding verification method in the embodiment 2, and the device is the same as the device in the embodiment 3, please refer to Figure 3 or 4, the device comprises:

[0091] A turntable;

[0092] An electronic warfare equipment, the electronic warfare equipment is installed on the turntable, and the center of gravity of the electronic warfare equipment coincides with the center of the turntable;

[0093] A radiation source, 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 the electromagnetic field.

[0094] Based on the same technical concept, the embodiment of the application further provides an electronic device, which can realize the high-precision direction pattern acquisition method and the direction-finding verification method flow provided in the above embodiments. In an embodiment, the electronic device is realized as a display control device, as shown in Figure 4 The electronic device can comprise:

[0095] At least one processor and a memory connected with the at least one processor, and the specific connection medium between the processor and the memory is not limited in the embodiment of the application,Figure 4 In the description, the connection between the processor and the memory through the bus is taken as an example. The bus is represented by a thick line. Figure 4 In the description, the connection between the processor and the memory through the bus is taken as an example. The bus is represented by a thick line. Figure 4 In the description, the connection between the processor and the memory through the bus is taken as an example. The bus is represented by a thick line.

[0096] In the embodiment of the application, the memory stores instructions executable by the at least one processor, and the at least one processor can execute the high-precision directional diagram acquisition method and the direction finding verification method flow discussed above by executing the instructions stored in the memory. The processor can realize the functions of various modules in the device shown in the description. Figure 4 In the embodiment of the application, the memory stores instructions executable by the at least one processor, and the at least one processor can execute the high-precision directional diagram acquisition method and the direction finding verification method flow discussed above by executing the instructions stored in the memory. The processor can realize the functions of various modules in the device shown in the description.

[0097] In the embodiment of the application, the memory stores instructions executable by the at least one processor, and the at least one processor can execute the high-precision directional diagram acquisition method and the direction finding verification method flow discussed above by executing the instructions stored in the memory. The processor can realize the functions of various modules in the device shown in the description.

[0098] In an alternative design, the processor can include one or more processing units, and the processor can integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, the user interface, and the application program, and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor can also not be integrated into the processor. In some embodiments, the processor and the memory can be implemented on the same chip, and in some embodiments, they can also be implemented on independent chips respectively.

[0099] The processor can be a general-purpose processor, such as a CPU, a digital signal processor, an application-specific integrated circuit, a field programmable gate array, or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the high-precision directional diagram acquisition method and the direction finding verification method flow disclosed in the embodiments of the application can be directly embodied as execution completed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

[0100] The 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. The memory can include at least one type of storage medium, for example, can include 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. The memory is any other medium capable of carrying or storing desired program code in the form of instructions or data structures and capable of being accessed by a computer, but is not limited thereto. The memory in the embodiments of the present application can also be a circuit or any other device capable of realizing the storage function, used for storing program instructions and / or data.

[0101] By designing and programming the processor, the codes corresponding to the high-precision pattern acquisition method and the direction finding verification method flow introduced in the foregoing embodiments can be fixed into the chip, so that the chip can execute the steps of the method of the foregoing embodiments when running. How to design and program the processor is a technology known to those skilled in the art, which will not be described here.

[0102] Based on the same inventive concept, the embodiments of the present application also provide a storage medium storing computer instructions, when the computer instructions run on a computer, the computer instructions make the computer execute the foregoing high-precision pattern acquisition method and direction finding verification method flow.

[0103] In some optional embodiments, the present application also provides that each aspect of the high-precision pattern acquisition method and the direction finding verification method flow can also be realized in the form of a program product, which includes program codes, when the program product runs on the device, the program codes are used to make the control device execute the steps of the high-precision pattern acquisition method and the direction finding verification method flow according to various exemplary embodiments of the present application described in the present specification.

[0104] It should be noted that, although several units or sub-units of the apparatus are mentioned in the above detailed description, such division is merely exemplary and not mandatory. Indeed, according to an embodiment of the application, the features and functionalities of two or more units described above can be embodied in one unit. Conversely, the features and functionalities of one unit described above can be further divided into units embodied by several units. Moreover, although the operations of the method of the application are described in a particular, sequential order, this is not necessarily the case. Indeed, certain of the steps can be performed in a different order than that described, or can be performed concurrently. Additionally or alternatively, certain steps can be omitted, combined, or further divided into multiple steps.

[0105] Those skilled in the art will appreciate that embodiments of the application can be supplied as a method, a system, or a computer program product. Accordingly, the application can be embodied in the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the application can be embodied in the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk memory, CD-ROMs, optical storage media, etc.) having computer usable program code embodied therein.

[0106] The present application is described in reference to the flowchart illustrations and / or block diagrams of the methods, apparatus (systems) and computer program products according to embodiments of the application. 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 processing system or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams block or blocks. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams block or blocks. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams block or blocks.

[0107] The program code for carrying out operations of the application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++, or the like, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device or entirely on the remote computing device or server.

[0108] In situations where the remote computing device is involved, the remote computing device can be connected to the user computing device through any kind of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computing device (e.g., using an Internet service provider to connect through the Internet).

[0109] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the Figure 1 function specified in a flow or multiple flows and / or blocks Figure 1 of the block or blocks.

[0110] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions executed on the computer or other programmable apparatus provide steps for implementing the Figure 1 function specified in a flow or multiple flows and / or blocks Figure 1 of the block or blocks.

[0111] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-precision pattern acquisition method, characterized by, The application relates to a high-precision direction pattern acquisition method. The electronic warfare equipment is fixedly arranged on a rotating table, a radiation source is arranged 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 gravity of the electronic warfare equipment coincides with the center of the rotating table; A distance measuring instrument is used 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; An 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 is calculated by using the measured distance from the center of the antenna array to the center of the rotating table; The electronic warfare equipment is controlled to normally work, the parameters of the radiation source are adjusted, the rotating table is controlled to rotate, and the direction pattern data of the electronic warfare equipment are acquired; The direction pattern data are corrected by using the angle correction model, and 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 is corrected. The angle correction model calculation process is as follows: 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 are measured; the deviation angle of the incident angle of the radiation source relative to the antenna array surface of the electronic warfare equipment and the initial angle of the rotating table is calculated; the rotating table is rotated by an arbitrary angle, the coordinates of the radiation source in a coordinate system with the center of gravity of the electronic warfare equipment as the origin are calculated by combining the distance from the radiation source to the center of gravity of the electronic warfare equipment and the deviation angle; a coordinate conversion matrix from the coordinate system with the center of gravity 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 is acquired; 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 are determined according to the coordinate conversion matrix; and the incident angle of the radiation source relative to the center of the antenna array of the electronic warfare equipment is calculated 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.

2. The high-precision pattern acquisition method according to claim 1, characterized in that, The distance between the electronic warfare equipment and the radiation source satisfies the far-field condition of an electromagnetic field.

3. The high-precision pattern acquisition method according to claim 1, characterized in that, The expression of the angle correction model is as follows: 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 angle of incidence 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.

4. A direction finding verification method characterized by, The high-precision direction pattern acquisition method is realized according to any one of claims 1-3, and specifically comprises the following steps: The corrected direction pattern data are used to generate a direction finding parameter and are loaded to the electronic warfare equipment; The parameters of the radiation source and the rotating angle of the rotating table are adjusted, the electronic warfare equipment is controlled to work, and a direction finding result is acquired; The angle of the rotating table is corrected by using the angle correction model, and the direction finding result of the electronic warfare equipment is verified.

5. The direction finding verification method of claim 4, wherein, The verification of the direction finding result of the electronic warfare equipment comprises the following steps: The radiation source is placed at another position in a space range, the incident angle of the radiation source relative to the antenna array is calibrated by using an angle calibration device with the antenna array of the electronic warfare equipment as the center, and the verification of the direction finding result of the electronic warfare equipment is completed by using the incident angle; 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 direction pattern data are corrected, the direction finding result is reacquired based on the corrected direction pattern data, and the verification of the direction finding result of the electronic warfare equipment is completed by repeating the above steps until the acquired direction finding result has no deviation.

6. Direction finding verification method according to claim 4 or 5, characterized in that, The verification of the direction finding result of the electronic warfare equipment further comprises the following steps: The accurate incident angle of the radiation source relative to the antenna array is calibrated by using an angle calibration device with the antenna array of the electronic warfare equipment as the center, and the verification of the direction finding result of the electronic warfare equipment is completed by combining the measurement result of the electronic warfare equipment to the radiation source. 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 cycle is repeated until the direction-finding result obtained does not have deviation, and the direction-finding verification of the electronic warfare equipment is completed.

Images