A high-efficiency integrated detection method for scattering characteristics of multiple finished parts

Abstract

The present invention provides a high-efficiency integrated detection method for the scattering characteristics of multiple finished parts, which belongs to the field of electromagnetic scattering measurement. First, a multi-component low-scattering carrier is designed, which is a flat teardrop-shaped seamlessly connected hollow structure, and a plurality of openings are provided in the middle of the upper surface for connecting target components; multiple components are installed on the carrier and joint testing is performed; after processing the test data, a two-dimensional imaging map of the multi-component low-scattering carrier is obtained; the scattering sources of each target component in the two-dimensional imaging map are separated and reconstructed, and the point-frequency RCS data of each target component after reconstruction is obtained; finally, peak statistics are performed to obtain all-round RCS test data of multiple components. The present invention installs multiple components on the same carrier, and the scattering signals between the components do not interfere with each other. The RCS of multiple tested components are obtained synchronously in one test, which greatly improves the efficiency of multi-component testing and enhances the stealth testing and evaluation capabilities of components.

Description

Technical Field

[0001] The invention relates to the field of electromagnetic scattering measurement, and in particular to a high-efficiency integrated detection method for scattering characteristics of multiple finished products. Background Art

[0002] Radar Cross Section (RCS) is a core indicator used to measure the stealth performance of aircraft. In the design and manufacturing process of stealth aircraft, in order to reduce the design and manufacturing costs, it is necessary to measure the RCS of the target. The actual installed aircraft is large in size and has many measurement points. The measurement of the whole aircraft has high site requirements and the measurement time is too long. Therefore, the RCS of the fuselage components is measured in the early stage of the aircraft stealth design. However, once the target component is separated from the aircraft body structure, the edge and embedded structure of the target component will be exposed to radar waves. If the target component is tested without any treatment, the scattering of its edge and embedded structure will affect the RCS test accuracy of the component. Usually, a special low-scattering carrier is designed according to the component structure, and the component to be tested is installed on the carrier to eliminate the scattering effect of the component edge and embedded structure.

[0003] The current low-scattering carriers are specially designed for the appearance and structure of a certain type of components, and each stealth fighter has a large number of components, which leads to the heavy task of component stealth evaluation undertaken by domestic stealth test laboratories every year. The large number of test and evaluation tasks lengthens the component test cycle and reduces the efficiency of stealth iteration. In the reality of such a large number of evaluation tasks, it is very important to improve the test and evaluation efficiency of components. Therefore, it is necessary to provide a high-efficiency test method for integrated detection of scattering characteristics of multiple components to solve the problems of large workload of carrier replacement and low test efficiency, and improve the efficiency of component darkroom stealth test and evaluation capabilities.

[0004] Publication number CN106428625A, publication date September 14, 2016, the invention patent named "A low scattering carrier for RCS testing" provides a low scattering carrier and test method for component RCS testing. It is designed with an integrated structure with the test component, and is smoothly and tightly connected, which better simulates the actual state of the component when it is installed, so that the component can be more accurately measured and evaluated for RCS. Its disadvantage is that it is difficult to achieve joint testing of multiple components at the same time for RCS testing of a single component.

[0005] The invention patent with publication number CN111504952A and publication date August 7, 2020, entitled "A low-scattering carrier taking into account both horizontal and vertical polarizations and its test method", solves the problem that the previous low-scattering carrier could not simultaneously take into account the RCS measurement of the horizontal polarization and vertical polarization of the component. Its shortcoming is that this test method can only complete the RCS test of one component at a time, and the test efficiency is low. Summary of the invention

[0006] The present invention provides a high-efficiency integrated detection method for the scattering characteristics of multiple finished parts. By installing multiple components on the same carrier, the scattering signals between the components do not interfere with each other, and the RCS of multiple tested components can be obtained synchronously in one test. This solves the problem that the existing low-scattering carrier test method only evaluates the RCS of a single component and cannot efficiently take into account the joint test of multiple components.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0008] A high-efficiency integrated detection method for scattering characteristics of multiple finished products, the integrated detection method comprising the following steps:

[0009] Step 1: Design a multi-component low-scatter carrier

[0010] In order to achieve high-efficiency integrated detection of the scattering characteristics of multiple finished parts, it is first necessary to design a multi-component low-scattering carrier that can take into account the RCS joint testing of multiple finished parts, including metallized low-scattering carrier structure design, horizontal polarization carrier design and vertical polarization carrier design.

[0011] The metallized low-scattering carrier is a hollow structure, shaped like a flat teardrop with a forward tip, symmetrical on both sides, with a plane in the middle of the upper surface as the target area, and the edge of the upper surface seamlessly connected to the lower surface through a smooth curved surface. A plurality of openings are provided in a part of the target area of ​​the upper surface, and the edge of each opening is recessed inward to form a groove. A fixing seat is provided in each groove according to the shape of the connection between the bottom of each target component and the low-scattering carrier, for corresponding installation of the target component. When the target component is installed on the low-scattering carrier, the bottom edge of the target component is flush with and tightly fitted to the upper surface of the low-scattering carrier, which can well simulate the state of each target component during actual installation, thereby realizing accurate measurement and evaluation of the RCS of the target component.

[0012] When designing a horizontally polarized carrier, according to the C, X, and Ku band index requirements, an absorbing coating is sprayed on the surface of the metallized low-scattering carrier to reduce the scattering of high-frequency C, X, and Ku traveling waves, and then a conformal absorbing structure is used to reduce the RCS of the low-scattering carrier under horizontal polarization in the P, L, and S bands, so as to achieve extremely low scattering capability of the low-scattering carrier in the L to Ku bands and under horizontal polarization.

[0013] When designing a vertically polarized carrier, according to the P, L, S, C, X, and Ku band index requirements, the metalized low-scattering carrier is sprayed with an absorbing coating to reduce the RCS of the low-scattering carrier in the L to Ku bands, and reduce the RCS of the low-scattering carrier in the full band to a lower level.

[0014] Finally, the size of the low-scattering carrier is designed according to the connection area of ​​each target component installed on the low-scattering carrier and the relative position of the scattering source separation area of ​​each target component, and the final structure of the low-scattering carrier is obtained; specifically, each target component should be separated by a certain distance to reduce the influence of coupled scattering on each other and facilitate the subsequent separation of scattering sources. The spacing distance between the scattering source separation areas of adjacent target components is greater than 5 resolution units. The positioning points are marked on the bottom of the low-scattering carrier for installation and positioning during testing, and the low-scattering carrier model and each target component model are established, and the corresponding feature points are set; each target component is installed on the low-scattering carrier accordingly to obtain a multi-component low-scattering carrier.

[0015] Furthermore, the component scattering source separation area refers to a square area formed outside the connection position (fixed seat) of each target component and the low-scattering carrier, which is the minimum separation area of ​​the scattering source of each target component.

[0016] Furthermore, the resolution unit includes a longitudinal resolution unit and a lateral resolution unit:

[0017] The vertical resolution unit is:

[0018]

[0019] The lateral resolution unit is:

[0020]

[0021] Where c is the speed of light, B is the test bandwidth, f is the frequency, and θ is the azimuth domain.

[0022] Step 2: Joint testing of multi-component low-scatter carriers

[0023] Place the multi-component low-scatter carrier on the foam bracket, align the positioning point marked on the top of the foam bracket with the positioning point at the bottom of the multi-component low-scatter carrier to ensure position consistency during repeated tests; then install the metal bracket so that the center of gravity of the multi-component low-scatter carrier is in the central area of ​​the rotating top of the metal bracket, and tighten the multi-component low-scatter carrier and the rotating top screws to ensure that the multi-component low-scatter carrier is firmly connected to the metal bracket.

[0024] Align the forward tip of the multi-component low-scattering carrier with the incident direction of the electromagnetic wave at an azimuth angle of 0°, complete the multi-component low-scattering carrier, calibration body and background scattering signal tests in a darkroom in sequence, and obtain all-directional multi-component low-scattering carrier, calibration body and background test data respectively.

[0025] Step 3: 2D imaging of multi-component low-scatter carriers

[0026] After the test in step 2 is completed, the RCS curve of the multi-component low-scattering carrier is first obtained.

[0027] The RCS data of the multi-component low-scattering carrier are aligned in azimuth. Specifically, if the target area on which multiple target components are installed on the multi-component low-scattering carrier is a left-right symmetrical structure, the scattering peaks with obvious left and right characteristics are found from the RCS curve of the low-scattering carrier for mirror alignment; if the target area is asymmetrical, the position of the scattering peak with obvious characteristics is found from the RCS curve of the multi-component low-scattering carrier, and the test data is aligned in azimuth.

[0028] After the RCS data of the multi-component low-scattering carrier are aligned in azimuth, calibration and background cancellation are performed in sequence to obtain a two-dimensional image of the multi-component low-scattering carrier.

[0029] Step 4: Separation and reconstruction of multi-component scattering sources

[0030] Import the low-scatter carrier and the contours of each target component and align them with the two-dimensional imaging image obtained in step three. Generate contour points from the low-scatter carrier model and each template component model established in step one, import the two-dimensional imaging interface obtained in step three, find the corresponding feature points, and perform contour alignment.

[0031] After the contours are aligned, verify the accuracy of the RCS reconstruction of the target area. Specifically, select the entire target area and choose typical frequency points in the frequency band for reconstruction. Compare the reconstructed data with the original test data obtained in step 2. If the reconstruction accuracy is within ±1dB, the verification passes. If the verification fails, check and adjust the status of the multi-component low-scattering carrier, the connection status of each target component, the support status of the foam bracket and the metal bracket, and the background conditions during the test.

[0032] After the reconstruction accuracy is verified, the scattering sources of each target component in the target area of ​​the two-dimensional imaging image are separated and reconstructed; specifically, based on the low-scattering carrier and the contours of each target component, the scattering area of ​​each target component is selected and the corresponding frequency points are set for reconstruction to obtain the point-frequency RCS data of each target component after reconstruction.

[0033] Step 5: Multi-component RCS test data statistics

[0034] The angular domain mean, band mean, polarization mean, and peak value of important areas / core areas are counted for the reconstructed point-frequency RCS data of each target component to obtain all-round RCS test data of multiple components, where the important areas / core areas refer to the elevation angle domain and azimuth angle domain at a specific azimuth.

[0035] Beneficial effects of the present invention:

[0036] The high-efficiency integrated detection method for scattering characteristics of multiple finished parts provided by the present invention realizes RCS joint testing of multiple components loaded on the same carrier without affecting each other, greatly improving the efficiency of multi-component testing and enhancing the stealth testing and evaluation capabilities of components. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of a multi-component low-scattering carrier according to an embodiment of the present invention. In the figure, A, B, C, D, and E represent different target components, respectively. Δx is a lateral resolution unit, and Δy is a longitudinal resolution unit.

[0038] Figure 2 The figure is a test flow chart of an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The technical solution of the present invention is described clearly and completely below, and examples of the embodiments are shown in the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments improved or adjusted by ordinary technicians in this field belong to the protection scope of the present invention.

[0040] The present invention takes into account that after the overall stealth shape design of the aircraft is completed, the stealth performance test of each component needs to be considered. The existing component stealth performance test method is to install the component on a low-scattering carrier to simulate the actual installation state of the component on the aircraft. However, due to the large number of stealth components on the aircraft, the RCS test method of matching one target component with one carrier can no longer meet the test requirements for accelerating the aircraft stealth performance test and evaluation process. The present invention provides a high-efficiency integrated detection method for the scattering characteristics of multiple finished parts, which installs multiple target components on the same carrier for joint scattering characteristic testing, thereby improving the stealth testing and evaluation capabilities of aircraft components. The specific operating steps are as follows, and the flow chart is as follows. Figure 2 As shown:

[0041] Step 1: Design a multi-component low-scatter carrier

[0042] In order to achieve high-efficiency integrated detection of the scattering characteristics of multiple finished parts, it is first necessary to design a multi-component low-scattering carrier that can take into account the RCS joint testing of multiple finished parts, including metallized low-scattering carrier structure design, horizontal polarization carrier design and vertical polarization carrier design.

[0043] The metallized low-scatter carrier is designed as a hollow structure, with a flat teardrop shape with a forward tip, bilateral symmetry, a plane in the middle of the upper surface as the target area, and the edge is seamlessly connected to the lower surface through a smooth curved surface. Multiple openings are set in some areas within the plane range of the upper surface, and the edges of each opening are recessed inward to form a groove. The groove is designed to install the target component fixing seat that needs to be tested for RCS. When the target component is installed on the carrier, the bottom edge of the target component is flush and tightly fitted with the upper surface of the low-scatter carrier, so that it can well simulate the state of the target component during actual installation, thereby achieving accurate evaluation of the RCS of the target component.

[0044] The horizontal polarization carrier design includes the horizontal polarization forward carrier design, the lateral horizontal polarization carrier design, and the rear horizontal polarization carrier design; the vertical polarization carrier design includes the vertical polarization forward carrier design, the lateral vertical polarization carrier design, and the rear vertical polarization carrier design. Specifically:

[0045] Horizontally polarized forward carrier design. In view of the C, X, and Ku band index requirements, the metalized low-scattering carrier surface is sprayed with an absorbing coating to reduce high-frequency traveling wave scattering. On the basis of the low-scattering carrier, a conformal absorbing structure (an absorbing sleeve in this embodiment) is used to reduce the RCS of the carrier's P, L, and S bands, so as to achieve extremely low scattering capability of the carrier in the P to Ku band and horizontal polarization.

[0046] Vertically polarized forward carrier design. According to the P, L, S, C, X, and Ku band index requirements, the metalized low-scattering carrier is sprayed with an absorbing coating to reduce the RCS of the low-scattering carrier in the L to Ku bands, and the RCS of the low-scattering carrier in the full band is reduced to a lower level.

[0047] Lateral horizontal polarization carrier design. According to the C, X, and Ku band index requirements, an absorbing coating is sprayed on the surface of the metallized low-scattering carrier to reduce the scattering of high-frequency traveling waves, and a conformal absorbing structure (an absorbing sleeve in this embodiment) is used to reduce the L and S band horizontal polarization RCS of the low-scattering carrier, so as to achieve the extremely low scattering capability of the lateral horizontal polarization carrier in the L to Ku band and horizontal polarization.

[0048] Lateral vertical polarization carrier design. According to the L, S, C, X, and Ku band index requirements, the metalized low-scattering carrier is sprayed with an absorbing coating to reduce the carrier's L-Ku band RCS, and reduce the low-scattering carrier's full-band RCS to a lower level.

[0049] Design of backward horizontal polarization carrier. According to the C, X, and Ku band index requirements, an absorbing coating is sprayed on the surface of the metallized low-scattering carrier to reduce the scattering of high-frequency traveling waves, and then a conformal absorbing structure (an absorbing sleeve in this embodiment) is used to reduce the RCS of the carrier under L and S band horizontal polarization, so as to achieve the extremely low scattering capability of the backward horizontal polarization carrier under L~Ku band and horizontal polarization.

[0050] Backward vertical polarization carrier design. According to the L, S, C, X, and Ku band index requirements, the metalized low-scattering carrier is sprayed with an absorbing coating to reduce the carrier's L-Ku band RCS, and reduce the low-scattering carrier's full-band RCS to a lower level.

[0051] The carrier size is designed according to the relative position of the connection area between each target component and the low-scattering carrier and the separation area of ​​the scattering source of each target component. Adjacent components should be separated by a certain distance to reduce the influence of each other's coupled scattering and facilitate the subsequent RCS separation and reconstruction. Usually, the boundary interval of the separation area of ​​the scattering source of adjacent components should be no less than 5 resolution units, including the longitudinal resolution unit Δy and the lateral resolution unit Δx.

[0052] like Figure 1 As shown in the figure, a total of five target component installation positions A, B, C, D, and E are designed on the same low-scattering carrier, among which components A, B, and C are arranged longitudinally along the propagation direction of the electromagnetic wave, and components D, B, and E are arranged transversely along the azimuth. In the figure, the circular area is the connection position (fixed seat) between each target component and the low-scattering carrier, and the square area is the minimum separation area of ​​the component scattering source.

[0053] Therefore, when multiple target components are arranged along the propagation direction of electromagnetic waves, the longitudinal spacing of the separation area boundaries of adjacent component scattering sources should be no less than 5Δy (Δy=0.075 in this embodiment). When multiple components are arranged along the azimuth direction, the lateral spacing of the separation area boundaries of adjacent component scattering sources should be no less than 5Δx (Δx=0.05 in this embodiment). Mark positioning points on the bottom of the low-scattering carrier for installation and positioning during testing, establish a low-scattering carrier model and each target component model, and set corresponding feature points; install each target component on the low-scattering carrier accordingly to obtain a multi-component low-scattering carrier.

[0054] Step 2: Install multiple components on a low-scatter carrier and conduct joint testing

[0055] Place the multi-component low-scatter carrier on a truncated cone-shaped foam bracket, align the positioning point marked on the top of the foam bracket with the positioning point at the bottom of the low-scatter carrier to ensure position consistency during repeated tests; then install it on a metal bracket commonly used in testing, so that the center of gravity of the multi-component low-scatter carrier is in the central area of ​​the rotating top above the metal bracket, and tighten the multi-component low-scatter carrier and the rotating top screws to ensure that the multi-component low-scatter carrier is firmly connected to the metal bracket.

[0056] Align the forward tip of the multi-component low-scattering carrier with the incident direction of the electromagnetic wave at an azimuth angle of 0°, complete the multi-component low-scattering carrier, calibration body, and background scattering signal tests in a darkroom in sequence, and obtain all-directional multi-component low-scattering carrier, calibration body, and background test data respectively.

[0057] In this embodiment, a broadband RCS test is performed on a multi-component low-scattering carrier, and the specific test parameters are as follows: low frequency band: 0.2-3.2 GHz, test frequency interval 1 MHz, output data frequency interval 10 MHz; medium frequency band: 2.5-6.5 GHz, test frequency interval 1 MHz, output data frequency interval 10 MHz; high frequency band: 6-19 GHz, test frequency interval 2 MHz, output data frequency interval 10 MHz.

[0058] Step 3: 2D imaging of multi-component low-scatter carriers

[0059] After the test is completed, the RCS curve of the multi-component low-scattering carrier is first obtained.

[0060] The RCS data of the multi-component low-scattering carrier are aligned in azimuth. Specifically, if the target area on which multiple target components are installed on the multi-component low-scattering carrier is a left-right symmetrical structure, the scattering peaks with obvious left and right characteristics are found from the RCS curve of the low-scattering carrier for mirror alignment; if the target area is asymmetrical, the position of the scattering peak with obvious characteristics is found from the RCS curve of the multi-component low-scattering carrier, and the test data is aligned in azimuth.

[0061] In this embodiment, after the RCS data of the multi-component low-scattering carrier is aligned in azimuth, calibration and background cancellation are performed in sequence to obtain a two-dimensional imaging image of the multi-component low-scattering carrier. The imaging frequency band setting should be greater than the extraction frequency point by more than 100MHz, the synthetic aperture angle should be greater than the focus angle domain by more than 10°, the aperture center angle selects the center angle of the focus angle domain, and the radial window and the lateral window should be greater than 100% of the corresponding size of the target.

[0062] Step 4: Separation and reconstruction of multi-component scattering sources

[0063] Import the low-scatter carrier and the contours of each target component and align them with the two-dimensional imaging image obtained in step three. Generate contour points from the low-scatter carrier model and each template component model established in step one, import the two-dimensional imaging interface obtained in step three, find the corresponding feature points, and perform contour alignment.

[0064] After the contours are aligned, the accuracy of the RCS reconstruction of the target area is verified. The entire target area is selected and typical frequency points in the frequency band are selected for reconstruction. The reconstructed data is compared with the original test data obtained in step 2 to verify the reconstruction accuracy. In this embodiment, the reconstruction accuracy is within ±1dB and the verification is passed.

[0065] After the reconstruction accuracy is verified, the target component areas in the target area of ​​the two-dimensional imaging image are selected (i.e., scattering source separation) and reconstructed. According to the low-scattering carrier and the contours of each target component, the scattering area of ​​each target component is selected and the corresponding frequency points are set for reconstruction to obtain the point-frequency RCS data of the component after reconstruction.

[0066] Step 5: Multi-component RCS test data statistics

[0067] The reconstructed point-frequency RCS data of each target component is statistically analyzed in terms of angular domain mean, band mean, polarization mean, and peak values ​​in important areas / core areas to obtain all-round RCS test data for components A, B, C, D, and E.

[0068] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A high-efficiency integrated detection method for scattering characteristics of multiple finished products, characterized in that: The integrated detection method comprises the following steps: Step 1: Design a multi-component low-scatter carrier Design of multi-component low-scattering carriers including metallized low-scattering carrier structure design, horizontal polarization carrier design and vertical polarization carrier design; The metallized low-scattering carrier is a hollow structure, and is in the shape of a flat teardrop with a forward tip, bilaterally symmetrical, with a plane in the middle of the upper surface as the target area, and the edge of the upper surface is seamlessly connected to the lower surface through a smooth curved surface; a plurality of openings are provided in the target area, and the edge of each opening is recessed inward to form a groove, and a fixing seat is provided in each groove according to the shape of the connection between the bottom of each target component and the low-scattering carrier, for correspondingly installing the target component, and after the target component is installed, its bottom edge is flush with and tightly fitted to the upper surface of the low-scattering carrier; When designing a horizontally polarized carrier, according to the C, X, and Ku band index requirements, an absorbing coating is sprayed on the surface of the metalized low-scattering carrier to reduce the scattering of high-frequency traveling waves, and a conformal absorbing structure is used to reduce the RCS of the low-scattering carrier under horizontal polarization in the P, L, and S bands, so as to achieve extremely low scattering capability of the low-scattering carrier in the L to Ku bands and under horizontal polarization. When designing the vertical polarization carrier, according to the P, L, S, C, X, and Ku band index requirements, the metalized low-scattering carrier is sprayed with an absorbing coating to reduce the RCS of the low-scattering carrier in the L to Ku bands, and the RCS of the low-scattering carrier in the full band is reduced to a low level; Finally, the size of the low-scattering carrier is designed according to the connection area of ​​each target component installed on the low-scattering carrier and the relative position of the scattering source separation area of ​​each target component, and the final structure of the low-scattering carrier is obtained, in which the spacing distance between the scattering source separation areas of adjacent target components is greater than 5 resolution units; positioning points are marked on the bottom of the low-scattering carrier for installation and positioning during testing, and the low-scattering carrier model and each target component model are established, and the corresponding feature points are set; each target component is installed on the low-scattering carrier accordingly to obtain a multi-component low-scattering carrier; Step 2: Joint testing of multi-component low-scatter carriers Place the multi-component low-scatter carrier on the foam bracket, align the positioning point marked on the top of the foam bracket with the positioning point at the bottom of the multi-component low-scatter carrier to ensure position consistency during repeated tests; then install the metal bracket so that the center of gravity of the multi-component low-scatter carrier is in the center area of ​​the top rotation of the metal bracket, and lock the two together to ensure a firm connection; Align the forward tip of the multi-component low-scattering carrier with the incident direction of the electromagnetic wave at an azimuth angle of 0°, complete the multi-component low-scattering carrier, calibration body and background scattering signal tests in a darkroom in sequence, and obtain the omni-directional multi-component low-scattering carrier, calibration body and background test data respectively; Step 3: 2D imaging of multi-component low-scatter carriers After the test in step 2 is completed, the RCS curve of the multi-component low-scattering carrier is first obtained; Perform azimuth alignment processing on the RCS data of the multi-component low-scattering carrier, and then perform calibration and background cancellation processing in sequence to obtain a two-dimensional image of the multi-component low-scattering carrier; Step 4: Separation and reconstruction of multi-component scattering sources Generate contour points from the low-scattering carrier model and each target component model established in step one, import them into the two-dimensional imaging interface obtained in step three, find corresponding feature points, and perform contour alignment; After contour alignment, verify the accuracy of RCS reconstruction in the target area; After the reconstruction accuracy verification is passed, the scattering sources of each target component in the target area in the two-dimensional imaging image are separated and reconstructed to obtain the point frequency RCS data of each target component after reconstruction; Step 5: Multi-component RCS test data statistics The reconstructed point-frequency RCS data of each target component is statistically analyzed in terms of angular domain mean, band mean, polarization mean, and peak values ​​in important areas / core areas to obtain all-round RCS test data of multiple components.

2. A high-efficiency integrated detection method for scattering characteristics of multiple finished products according to claim 1, characterized in that: In the step 1, the component scattering source separation area refers to the square area formed outside the connection position of each target component and the low-scattering carrier, which is the minimum separation area of ​​the scattering source of each target component.

3. The high-efficiency integrated detection method for scattering characteristics of multiple finished products according to claim 1 is characterized in that: In the step 1, the resolution unit includes a longitudinal resolution unit and a lateral resolution unit: The vertical resolution unit is: The lateral resolution unit is: Where c is the speed of light, B is the test bandwidth, f is the frequency, and θ is the azimuth domain.

4. The high-efficiency integrated detection method for scattering characteristics of multiple finished products according to claim 1 is characterized in that: In the step 3, the RCS data of the multi-component low-scattering carrier is aligned in azimuth, and the specific operation is: if the target area is a left-right symmetrical structure after the multi-target components are installed, the scattering peaks with obvious left and right characteristics are found from the RCS curve of the low-scattering carrier to perform mirror alignment; If the target area is asymmetrical, find the location of the scattering peak with obvious characteristics from the RCS curve of the multi-component low-scattering carrier and align the test data in azimuth.

5. The high-efficiency integrated detection method for scattering characteristics of multiple finished products according to claim 1, characterized in that: In the step 4, the specific operation of verifying the accuracy of the RCS reconstruction of the target area is: select the entire target area and select typical frequency points in the frequency band for reconstruction, compare the reconstructed data with the original test data obtained in step 2, and verify that the reconstruction accuracy is within ±1dB. If the verification fails, check and adjust the state of the multi-component low-scattering carrier, the connection status of each target component, the support status of the foam bracket and the metal bracket, and the background status during the test.

6. The high-efficiency integrated detection method for scattering characteristics of multiple finished products according to claim 1, characterized in that: In step 4, the specific operation of separating and reconstructing the scattering sources of each target component in the target area of ​​the two-dimensional imaging image is: based on the low-scattering carrier and the contour of each target component, the scattering area of ​​each target component is framed and the corresponding frequency points are set for reconstruction.

7. The high-efficiency integrated detection method for scattering characteristics of multiple finished products according to claim 1 is characterized in that: In the step 5, the important area / core area refers to the elevation angle domain and the azimuth angle domain at a specific azimuth angle.

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