Electromagnetic scattering characteristic simulation detection method, device, equipment, medium and product

Abstract

The application discloses a kind of electromagnetic scattering characteristic simulation detection method, device, equipment, medium and product, by the radar echo data of standard target and the damage target to be measured is converted into time domain scattering data, and the damaged part in the time domain scattering data of damage target to be measured is replaced with the time domain scattering data of standard target, and then the overall scattering characteristic of damage target to be measured after simulation maintenance is obtained.Time domain data is used to replace damage part data, the result signal obtained has high continuity, few sections, and the small amount of discontinuous parts that appear is easy to recover, and the accuracy of evaluating the overall scattering characteristic of simulation maintenance damaged component is high through the data;Further, the overall scattering characteristic is obtained by data replacement to simulate maintenance to damage target to be measured, the local maintenance effect of damage target can be quickly estimated, maintenance reference is provided for maintenance personnel, and the number of repeated tests and test time of target are reduced.

Description

Technical Field

[0001] This application relates to the field of electromagnetic simulation technology, and in particular to a method, apparatus, equipment, medium and product for simulating and detecting electromagnetic scattering characteristics. Background Technology

[0002] Target electromagnetic scattering characteristics refer to the various information contained in the scattered waves generated by the electromagnetic current and electromagnetic charge radiation produced when electromagnetic waves irradiate the surface of an object. Inverse synthetic aperture radar (ISAR) imaging presents high-resolution one-dimensional, two-dimensional, and three-dimensional microwave images by processing the electromagnetic wave signals radiated by an object using algorithms. ISAR images can be used to obtain the location and amplitude information of the object's scattering points, diagnosing the object's shape, volume, orientation, and surface electromagnetic defects. When electromagnetic defects such as broken transparent metal mesh on the surface of equipment occur, the overall scattering characteristics of the equipment are enhanced, and the maximum detection distance increases. Therefore, to ensure the effectiveness of the equipment, it is usually necessary to replace or repair damaged parts in a timely manner to restore the equipment's electromagnetic scattering performance.

[0003] However, detecting the overall scattering characteristics of equipment after repair for localized damage requires repeated or even multiple radar scattering tests, which is inefficient. Summary of the Invention

[0004] The main objective of this application is to provide a method, apparatus, equipment, and medium for detecting the scattering characteristics of locally damaged equipment, aiming to solve the technical problem of low efficiency in existing methods for detecting the overall scattering characteristics of locally damaged equipment after repair.

[0005] To achieve the above objectives, this application provides a method for simulating and detecting electromagnetic scattering characteristics, comprising:

[0006] Acquire the first radar echo data of the standard target and the second radar echo data of the target to be damaged;

[0007] The first radar echo data and the second radar echo data are converted into first time-domain scattering data and second time-domain scattering data;

[0008] Based on the first time-domain scattering data, the time-domain data of the damage site of the target to be tested in the second time-domain scattering data is replaced to obtain the third time-domain scattering data;

[0009] Based on the third time-domain scattering data, the simulated overall scattering characteristics of the damaged target after repair are obtained.

[0010] Optionally, the step of converting the first radar echo data and the second radar echo data into first time-domain scattering data and second time-domain scattering data includes:

[0011] Perform I SAR two-dimensional imaging on the first radar echo data to obtain a first two-dimensional image;

[0012] Perform a range-direction inverse Fourier transform on the first two-dimensional image to obtain the first time-domain scattering data;

[0013] The second radar echo data is subjected to I SAR two-dimensional imaging to obtain a second two-dimensional image;

[0014] Perform a range-direction inverse Fourier transform on the second two-dimensional image to obtain the second time-domain scattering data.

[0015] Optionally, before the step of replacing the time-domain data of the damaged portion of the target in the second time-domain scattering data with the first time-domain scattering data to obtain the third time-domain scattering data, the method further includes:

[0016] The damaged area of ​​the target to be tested is located to obtain the time-domain data of the damaged area of ​​the target to be tested.

[0017] Optionally, the step of obtaining the simulated overall scattering characteristics of the damaged target after repair based on the third time-domain scattering data includes:

[0018] Perform a Fourier transform on the third time-domain scattering data to obtain a third two-dimensional image;

[0019] The third two-dimensional image is forward-projected or inverse Fourier transformed to obtain the simulated overall scattering characteristics of the damaged target after repair.

[0020] Optionally, the step of obtaining the simulated overall scattering characteristics of the damaged target after repair based on the third time-domain scattering data includes:

[0021] Perform a Fourier transform on the third time-domain scattering data to obtain a third two-dimensional image;

[0022] Based on the third two-dimensional image, the overall scattering cross-sectional area of ​​the target to be damaged is obtained;

[0023] Based on the overall scattering cross-sectional area, the simulated overall scattering characteristics of the damaged target after repair are obtained.

[0024] Optionally, after the step of obtaining the simulated overall scattering characteristics of the damaged target after repair based on the third time-domain scattering data, the method further includes:

[0025] The overall scattering characteristics after the simulated repair are compared with the performance indicators of the standard target to evaluate the effect of the simulated repair on the target under test.

[0026] Furthermore, to achieve the above objectives, this application also provides an electromagnetic scattering characteristic simulation and detection device, comprising:

[0027] A radar echo data acquisition device is used to acquire the first radar echo data of a standard target and the second radar echo data of a target to be damaged.

[0028] A time-domain scattering data conversion device is used to convert the first radar echo data and the second radar echo data into first time-domain scattering data and second time-domain scattering data;

[0029] A damage site replacement device is used to replace the time-domain data of the damage site of the target under test in the second time-domain scattering data according to the first time-domain scattering data, so as to obtain third time-domain scattering data;

[0030] A device for acquiring simulated post-repair scattering characteristics is used to acquire the simulated overall scattering characteristics of the damaged target after repair based on the third time-domain scattering data.

[0031] In addition, to achieve the above objectives, this application also provides a computer device including a memory and a processor, wherein the memory stores a computer program and the processor executes the computer program to implement the above-described method.

[0032] In addition, to achieve the above objectives, this application also provides a computer-readable storage medium storing a computer program, on which a processor executes the computer program to implement the above-described method.

[0033] In addition, to achieve the above objectives, this application also provides a computer program product that implements the above-described method when run by a processor.

[0034] The beneficial effects that this application can achieve.

[0035] This application proposes an electromagnetic scattering characteristic simulation detection method, apparatus, device, medium, and product. It involves acquiring first radar echo data of a standard target and second radar echo data of a target under test; converting the first and second radar echo data into first and second time-domain scattering data; replacing the time-domain data of the damaged portion of the target under test in the second time-domain scattering data with the first time-domain scattering data to obtain third time-domain scattering data; and obtaining the simulated overall scattering characteristics of the target under test after repair based on the third time-domain scattering data. In essence, it converts the radar echo data of the standard target and the target under test into time-domain scattering data, and replaces the damaged portion in the time-domain scattering data of the target under test with the time-domain scattering data of the standard target, thereby obtaining the simulated overall scattering characteristics of the target under test after repair. Replacing the damaged area data with time-domain data yields signals with high continuity and fewer cross-sections. The few discontinuous areas are easily recovered, resulting in high accuracy in evaluating the overall scattering characteristics of the damaged component during simulated repair. Furthermore, by replacing the damaged target with this data to simulate repair and obtain the overall scattering characteristics, the local repair effect of the damaged target can be quickly predicted, providing a repair reference for maintenance personnel. This reduces the number of repeated tests and the testing time. In practical applications, it has been found to improve repair testing efficiency by more than 50%, significantly saving manpower and resources. It has high application value in evaluating the repair effect of electromagnetic defects in aerospace equipment. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the computer device structure for the hardware operating environment involved in the embodiments of this application;

[0037] Figure 2 A flowchart illustrating an electromagnetic scattering characteristic simulation detection method provided in an embodiment of this application;

[0038] Figure 3 This is a schematic diagram of the functional modules of an electromagnetic scattering characteristic simulation and detection device provided in an embodiment of this application.

[0039] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0041] The main solution of this application embodiment is: a proposed electromagnetic scattering characteristic simulation detection method, device, equipment, medium, and product, which acquires first radar echo data of a standard target and second radar echo data of a target under test; converts the first radar echo data and the second radar echo data into first time-domain scattering data and second time-domain scattering data; based on the first time-domain scattering data, replaces the time-domain data of the damaged part of the target under test in the second time-domain scattering data to obtain third time-domain scattering data; and based on the third time-domain scattering data, obtains the simulated overall scattering characteristics of the target under test after repair.

[0042] In existing technologies, the electromagnetic scattering characteristics of a target refer to the various information contained in the scattered waves generated by the electromagnetic current and electromagnetic charge radiation produced when an electromagnetic wave irradiates the surface of an object. Inverse synthetic aperture radar (ISAR) imaging presents high-resolution one-dimensional, two-dimensional, and three-dimensional microwave images by processing the electromagnetic wave signals radiated by an object using algorithms. ISAR images can be used to obtain the location and amplitude information of the object's scattering points, diagnosing the object's shape, volume, orientation, and surface electromagnetic defects. When electromagnetic defects such as damage to transparent metal mesh on the equipment surface occur, the overall scattering characteristics of the equipment are enhanced, and the maximum detection distance increases. Therefore, to ensure the effectiveness of the equipment, it is usually necessary to replace or repair damaged parts in a timely manner to restore the equipment's electromagnetic scattering performance.

[0043] However, detecting the overall scattering characteristics of equipment after repair with localized damage requires repeated or even multiple radar scattering tests, which is inefficient, complex, and time-consuming, seriously affecting the maintenance cycle of the equipment.

[0044] To address this, this application provides a solution that converts radar echo data of a standard target and a target under test into time-domain scattering data. The damaged portion in the time-domain scattering data of the target under test is then replaced with the time-domain scattering data of the standard target, thereby obtaining the overall scattering characteristics of the target under test after simulated repair. Replacing the damaged portion data with time-domain data results in a signal with high continuity, fewer cross-sections, and easily recoverable minor discontinuities. This data provides high accuracy in evaluating the overall scattering characteristics of simulated repaired damaged components. Furthermore, by replacing the data to simulate repair of the target under test and obtaining the overall scattering characteristics, the local repair effect of the damaged target can be quickly predicted, providing a repair reference for maintenance personnel. This reduces the number of repeated tests and testing time. In practical applications, it has been found to improve repair testing efficiency by more than 50%, significantly saving manpower and resources. It has high application value in evaluating the repair effect of electromagnetic defects in aerospace equipment.

[0045] Reference Figure 1 , Figure 1This is a schematic diagram of the computer device structure of the hardware operating environment involved in the embodiments of this application.

[0046] like Figure 1 As shown, the computer device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk drive. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0047] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the computer device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0048] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a data storage module, a network communication module, a user interface module, and electronic programs.

[0049] exist Figure 1 In the computer device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the computer device of the present invention can be set in the computer device, and the computer device calls the electromagnetic scattering characteristic simulation detection device stored in the memory 1005 through the processor 1001 and executes the electromagnetic scattering characteristic simulation detection method provided in the embodiment of this application.

[0050] Reference Figure 2 Based on the hardware device of the foregoing embodiments, embodiments of this application provide a method for simulating and detecting electromagnetic scattering characteristics, including:

[0051] S10: Acquire the first radar echo data of the standard target and the second radar echo data of the target to be damaged;

[0052] In practical implementation, the standard target refers to the electromagnetically intact target with no surface damage; the damaged target to be tested refers to a damaged target of the same type and size as the standard target. Radar echo data refers to the electromagnetic scattering test data resource obtained by the electromagnetic waves emitted by the radar reflecting and scattering the electromagnetic waves after they encounter the target object during propagation.

[0053] Specifically, using inverse synthetic aperture radar (ISAR) and a turntable, the overall radar scattering characteristics of a standard target and a damaged target under test are tested, respectively, to obtain first and second radar echo data. Furthermore, the first radar echo data of a standard target with intact electromagnetic surfaces is analyzed and evaluated. Based on the electromagnetic scattering characteristics and test parameters of the standard target, an electromagnetic scattering data resource library is established to construct the electromagnetic scattering characteristics of the standard target, enabling the acquisition of the standard target's echo response.

[0054] S20: Convert the first radar echo data and the second radar echo data into first time-domain scattering data and second time-domain scattering data;

[0055] In practical implementation, radar echo data obtained through inverse synthetic aperture radar (ISAR) and turntable testing is typically spatial data. Spatial domain, also known as the pixel domain, involves pixel-level processing, such as pixel-level image overlay. Fourier transform can then be used to obtain the image's spectrum, representing its energy gradient. The time domain, also known as the time field, has time as its independent variable; the horizontal axis represents time, and the vertical axis represents signal variation. Its dynamic signal x(t) is a function describing the signal's values ​​at different times.

[0056] In the subsequent step S30, if the damaged area is directly replaced using spatial domain data, the phase is discontinuous, resulting in a broken signal after replacement and affecting the accuracy of the final judgment. In practice, it has been found that time domain data exhibits high continuity and accuracy after the damaged area is replaced. Therefore, the acquired first and second radar echo data are converted to obtain first and second time domain scattering data to improve the overall accuracy of the test results.

[0057] As an optional implementation, the step of converting the first radar echo data and the second radar echo data into first time-domain scattering data and second time-domain scattering data includes: performing ISAR two-dimensional imaging on the first radar echo data to obtain a first two-dimensional image; performing range-directed inverse Fourier transform on the first two-dimensional image to obtain the first time-domain scattering data; performing ISAR two-dimensional imaging on the second radar echo data to obtain a second two-dimensional image; and performing range-directed inverse Fourier transform on the second two-dimensional image to obtain the second time-domain scattering data.

[0058] In the specific implementation process, radar echo data is converted into time-domain scattering data through ISAR two-dimensional imaging and range-direction inverse Fourier transform. ISAR two-dimensional imaging refers to achieving high-resolution turntable two-dimensional imaging of the target using imaging algorithms such as range-Doppler and convolution-backprojection; ISAR two-dimensional imaging is performed on the first and second radar echo data respectively to obtain the first and second two-dimensional images. Range-direction inverse Fourier transform refers to performing an inverse Fourier transform (IFFT) on the range data based on the high-resolution turntable two-dimensional imaging of the target to obtain time-domain scattering data; IFFT is then performed on the first and second two-dimensional images respectively to obtain the first and second time-domain scattering data.

[0059] As an optional implementation, before the step of replacing the time-domain data of the damaged part of the target under test in the second time-domain scattering data with the first time-domain scattering data to obtain the third time-domain scattering data, the method further includes: locating the damaged part of the target under test and obtaining the time-domain data of the damaged part of the target under test.

[0060] In the specific implementation process, damaged component localization refers to obtaining the target location information in the distance upward by transforming the physical location of the damaged part of the target under test through spatial scale transformation, so as to obtain the radar echo data of the target with local damage, that is, the time domain data of the damaged part of the target under test.

[0061] Specifically, the physical location of the damaged component (the physical location of the damaged component on the target) is converted to the range direction using the test radar normal as the baseline and spatial scale transformation, thus obtaining the range direction position information of the damaged component.

[0062] S30: Based on the first time-domain scattering data, replace the time-domain data of the damage site of the target to be tested in the second time-domain scattering data to obtain the third time-domain scattering data;

[0063] In the specific implementation process, the time-domain data corresponding to the damaged part in the first time-domain scattering data of the standard target is used to replace the damaged part in the second time-domain scattering data of the target to be tested, thereby obtaining the time-domain data of the target to be tested after simulated repair, i.e., the third time-domain scattering data. The time-domain data after simulated repair, after time-domain data replacement, has high signal continuity, few discontinuities, and the few discontinuous parts that appear are easy to recover. The accuracy of subsequent evaluation of the overall scattering characteristics of the simulated repaired damaged parts using this data is high. Compared with using spatial domain data to replace the damaged part, the method of this application embodiment has high accuracy.

[0064] S40: Based on the third time-domain scattering data, obtain the simulated overall scattering characteristics of the damaged target after repair.

[0065] In practice, by converting the third-domain time-domain scattering data into range-azimuth two-dimensional scattering data, the overall scattering characteristics of the target after simulated repair can be obtained. These overall scattering characteristics can quickly predict the local repair effect of the damaged target, providing a repair reference for maintenance personnel, reducing the number of repeated tests and testing time, and improving repair and testing efficiency.

[0066] As an optional implementation, the step of obtaining the simulated overall scattering characteristics of the damaged target after repair based on the third time-domain scattering data includes: performing a Fourier transform on the third time-domain scattering data to obtain a third two-dimensional image; and performing a forward projection or inverse Fourier transform on the third two-dimensional image to obtain the simulated overall scattering characteristics of the damaged target after repair.

[0067] In the specific implementation process, the range-azimuth two-dimensional scattering data of the overall target after repair is obtained by Fourier transform (FFT), which is the two-dimensional radar image of the target after simulated repair of the damaged target, also known as the third two-dimensional image. The third two-dimensional image can intuitively show the distribution of scattering sources at the repair location, so as to show the overall scattering characteristics of the target after simulated repair.

[0068] After obtaining the third two-dimensional image, forward projection or inverse Fourier transform techniques can be used to process the range-azimuth two-dimensional scattering data to obtain the data domain (frequency and angle domain) scattering characteristics of the target after repair, that is, the overall scattering characteristics of the damaged target after simulated repair.

[0069] As an optional implementation, the step of obtaining the simulated post-repair overall scattering characteristics of the damaged target based on the third time-domain scattering data includes: performing a Fourier transform on the third time-domain scattering data to obtain a third two-dimensional image; obtaining the overall scattering cross-sectional area of ​​the damaged target based on the third two-dimensional image; and obtaining the simulated post-repair overall scattering characteristics of the damaged target based on the overall scattering cross-sectional area.

[0070] In the specific implementation process, the range-azimuth two-dimensional scattering data of the overall target after repair is obtained by Fourier transform (FFT), which is the two-dimensional radar image of the target after the damage is simulated and repaired, also known as the third two-dimensional image.

[0071] After obtaining the third two-dimensional image, the Passavar theorem can be used to obtain the overall scattering cross-sectional area in the target's spatial frequency domain. The overall scattering characteristics of the target under test after simulated repair can be obtained through this overall scattering cross-sectional area.

[0072] Specifically, Passawa's theorem states that the average cross-sectional area δ of the target scattering in the spatial frequency domain is... av The following equation should satisfy the relationship between the pixel value Γ(x, y) of the two-dimensional radar imaging and the image:

[0073]

[0074] Under small-angle imaging conditions, the average value of the scattering cross-sectional area in the spatial frequency domain is equal to the sum of all pixel values ​​of the two-dimensional radar image. By using the sum of pixel values ​​of the two-dimensional radar image of the repaired target, the average value of the overall scattering cross-sectional area in the spatial frequency domain of the target can be obtained, and thus the simulated overall scattering characteristics of the damaged target after repair can be obtained.

[0075] As an optional implementation, after the step of obtaining the simulated overall scattering characteristics of the damaged target under test based on the third time-domain scattering data, the method further includes: comparing the simulated overall scattering characteristics after repair with the performance index of the standard target to evaluate the simulated repair effect of the damaged target under test.

[0076] In practice, the above method allows for the simulated replacement and repair of damaged components on the target under test, and the overall scattering characteristics of the repaired target can be quickly obtained. By comparing the simulated overall scattering characteristics with the performance indicators of a standard target, the effectiveness of the simulated repair on the target under test can be evaluated.

[0077] Specifically, by comparing the simulated overall scattering characteristics after repair with the test scattering characteristics data of the target before repair, as well as the target's performance indicators, and conducting data analysis according to the GJB3830A-2017 standard "Data Processing and Format Requirements for Electromagnetic Scattering Characteristics of Targets", the effect of component repair can be directly predicted, thereby evaluating the overall scattering characteristics of the target after repair.

[0078] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solution of this application. Those skilled in the art can make settings as needed in practical applications, and no restrictions are imposed here.

[0079] As can be seen from the above description, this embodiment converts the radar echo data of a standard target and the target under test into time-domain scattering data, and replaces the damaged parts in the time-domain scattering data of the target under test with the time-domain scattering data of the standard target, thereby obtaining the overall scattering characteristics of the target under test after simulated repair. Replacing the damaged part data with time-domain data results in a signal with high continuity, fewer cross-sections, and easy recovery of any few discontinuous parts. This data provides high accuracy in evaluating the overall scattering characteristics of the simulated repaired damaged parts. Furthermore, by replacing the data to simulate repair of the target under test and obtaining the overall scattering characteristics, the local repair effect of the damaged target can be quickly predicted, providing a repair reference for maintenance personnel. This reduces the number of repeated tests and the testing time. In practical applications, it has been found to improve repair testing efficiency by more than 50%, significantly saving manpower and resources. It has high application value in the evaluation of the repair effect of electromagnetic defects in aviation and aerospace equipment.

[0080] Reference Figure 3 Based on the same inventive concept, embodiments of this application also provide an electromagnetic scattering characteristic simulation and detection device, comprising:

[0081] A radar echo data acquisition device is used to acquire the first radar echo data of a standard target and the second radar echo data of a target to be damaged.

[0082] A time-domain scattering data conversion device is used to convert the first radar echo data and the second radar echo data into first time-domain scattering data and second time-domain scattering data;

[0083] A damage site replacement device is used to replace the time-domain data of the damage site of the target under test in the second time-domain scattering data according to the first time-domain scattering data, so as to obtain third time-domain scattering data;

[0084] A device for acquiring simulated post-repair scattering characteristics is used to acquire the simulated overall scattering characteristics of the damaged target after repair based on the third time-domain scattering data.

[0085] It should be noted that each module in the electromagnetic scattering characteristic simulation and detection device in this embodiment corresponds one-to-one with each step in the electromagnetic scattering characteristic simulation and detection method in the aforementioned embodiment. Therefore, the specific implementation method of this embodiment can refer to the implementation method of the aforementioned electromagnetic scattering characteristic simulation and detection method, and will not be repeated here.

[0086] Furthermore, in one embodiment, the present application also provides a computer device, the device including a processor, a memory, and a computer program stored in the memory, the computer program being executed by the processor to implement the steps of the methods in the foregoing embodiments.

[0087] Furthermore, in one embodiment, the present application also provides a computer storage medium storing a computer program, which, when executed by a processor, implements the steps of the methods described in the foregoing embodiments.

[0088] In some embodiments, the computer-readable storage medium may be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, flash memory, magnetic surface memory, optical disk, or CD-ROM; or it may be a device including one or any combination of the above-mentioned memories. The computer may be a variety of computing devices, including smart terminals and servers.

[0089] In some embodiments, executable instructions may take the form of a program, software, software module, script, or code, written in any form of programming language (including compiled or interpreted languages, or declarative or procedural languages), and may be deployed in any form, including as a standalone program or as a module, component, subroutine, or other unit suitable for use in a computing environment.

[0090] As an example, executable instructions may, but do not necessarily, correspond to files in a file system. They may be stored as part of a file that holds other programs or data, for example, in one or more scripts in a Hyper Text Markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple collaborating files (e.g., a file that stores one or more modules, subroutines, or code sections).

[0091] As an example, executable instructions can be deployed to execute on a single computing device, or on multiple computing devices located in one location, or on multiple computing devices distributed across multiple locations and interconnected via a communication network.

[0092] Furthermore, in one embodiment, the present application also provides a computer program product that, when run by a processor, implements the steps of the methods described in the foregoing embodiments.

[0093] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0094] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0095] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory / random access memory, magnetic disk, optical disk) and includes several instructions to cause a multimedia terminal device (which may be a mobile phone, computer, television receiver, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0096] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for simulating and detecting electromagnetic scattering characteristics, characterized in that, Includes the following steps: Acquire the first radar echo data of the standard target and the second radar echo data of the target to be damaged; The first radar echo data and the second radar echo data are converted into first time-domain scattering data and second time-domain scattering data; Based on the first time-domain scattering data, the time-domain data of the damage site of the target to be tested in the second time-domain scattering data is replaced to obtain the third time-domain scattering data; Based on the third time-domain scattering data, the simulated overall scattering characteristics of the damaged target after repair are obtained.

2. The electromagnetic scattering characteristic simulation and detection method as described in claim 1, characterized in that, The step of converting the first radar echo data and the second radar echo data into first time-domain scattering data and second time-domain scattering data includes: ISAR two-dimensional imaging is performed on the first radar echo data to obtain a first two-dimensional image; Perform a range-direction inverse Fourier transform on the first two-dimensional image to obtain the first time-domain scattering data; ISAR two-dimensional imaging is performed on the second radar echo data to obtain a second two-dimensional image; Perform a range-direction inverse Fourier transform on the second two-dimensional image to obtain the second time-domain scattering data.

3. The electromagnetic scattering characteristic simulation and detection method as described in claim 1, characterized in that, Before the step of replacing the time-domain data of the damaged part of the target in the second time-domain scattering data with the first time-domain scattering data to obtain the third time-domain scattering data, the method further includes: The damaged area of ​​the target to be tested is located to obtain the time-domain data of the damaged area of ​​the target to be tested.

4. The electromagnetic scattering characteristic simulation and detection method as described in claim 1, characterized in that, The step of obtaining the simulated overall scattering characteristics of the damaged target after repair based on the third time-domain scattering data includes: Perform a Fourier transform on the third time-domain scattering data to obtain a third two-dimensional image; The third two-dimensional image is forward-projected or inverse Fourier transformed to obtain the simulated overall scattering characteristics of the damaged target after repair.

5. The electromagnetic scattering characteristic simulation and detection method as described in claim 1, characterized in that, The step of obtaining the simulated overall scattering characteristics of the damaged target after repair based on the third time-domain scattering data includes: Perform a Fourier transform on the third time-domain scattering data to obtain a third two-dimensional image; Based on the third two-dimensional image, the overall scattering cross-sectional area of ​​the target to be damaged is obtained; Based on the overall scattering cross-sectional area, the simulated overall scattering characteristics of the damaged target after repair are obtained.

6. The electromagnetic scattering characteristic simulation and detection method as described in claim 1, characterized in that, After the step of obtaining the simulated overall scattering characteristics of the damaged target after repair based on the third time-domain scattering data, the method further includes: The overall scattering characteristics after the simulated repair are compared with the performance indicators of the standard target to evaluate the effect of the simulated repair on the target under test.

7. An electromagnetic scattering characteristic simulation and detection device, characterized in that, include: A radar echo data acquisition device is used to acquire the first radar echo data of a standard target and the second radar echo data of a target to be damaged. A time-domain scattering data conversion device is used to convert the first radar echo data and the second radar echo data into first time-domain scattering data and second time-domain scattering data; A damage site replacement device is used to replace the time-domain data of the damage site of the target under test in the second time-domain scattering data according to the first time-domain scattering data, so as to obtain third time-domain scattering data; A device for acquiring simulated post-repair scattering characteristics is used to acquire the simulated overall scattering characteristics of the damaged target after repair based on the third time-domain scattering data.

8. A computer device, characterized in that, The computer device includes a memory and a processor, wherein the memory stores a computer program and the processor executes the computer program to implement the method as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, and the processor executes the computer program to implement the method as described in any one of claims 1-6.

10. A computer program product, characterized in that, When the computer program product is run by a processor, it implements the method as described in any one of claims 1-6.

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