SAR scene matching scaling verification system

Abstract

The invention belongs to the technical field of SAR (Synthetic Aperture Radar) scene matching, and particularly relates to an SAR scene matching scaling verification system which comprises a dynamic scaling module, a display control and processing module and a power supply module. The dynamic scaling module is used for simulating a relative motion relation between an SAR load and a target scene and collecting echo data of a target area. The display control and processing module is used for echo data SAR imaging, scene matching, display and control. The scaling verification system adopts the millimeter wave radar sensor, and is small in size, low in power consumption and high in integration level; the scaling verification system adopts the electric guide rail platform to simulate the relative motion of the radar and the target, the test is simple and convenient, and the reliability is high; the scaling verification system has flexible configuration capability, can collect an SAR reference image and an SAR real-time image according to parameter setting, and is low in test cost and high in verification efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of SAR scene matching, and in particular relates to a SAR scene matching scaling verification system. Background Art

[0002] SAR scene matching technology has widespread applications in visual navigation, precision guidance, and unmanned aerial vehicle (UAV) positioning. Its development and application verification typically require integrating a complete SAR scene matching system, control system, and power supply into a scene matching flight system, which is then installed on a small transport aircraft. Airborne integrated flight tests capture real-time SAR imagery and perform scene matching against pre-acquired satellite reference images of the relevant area, completing technical verification.

[0003] SAR scene matching flight systems are highly complex and challenging to debug. Due to size, weight, and power consumption limitations, they must be operated by manned or unmanned aerial vehicles (UAVs) with large payloads. Organizing flight tests also involves airspace coordination, aircraft leasing, reference map acquisition, and scene layout, resulting in high costs, long cycles, and low efficiency. Summary of the Invention

[0004] (1) Technical issues to be resolved

[0005] The technical problem to be solved by the present invention is: in order to overcome the defects of scene matching flight systems such as complexity, high testing cost, long time consumption and low efficiency, how to provide a miniaturized, lightweight, easy-to-use and reliable scene matching scale verification system to simulate the relative motion relationship between SAR payload and target scene, realize real-time image acquisition and scene matching process, evaluate the accuracy and robustness of SAR scene matching algorithm, and provide reliable technical support for the development and verification of actual system.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the present invention provides a SAR scene matching scaling verification system, which includes: a dynamic scaling module, a display control and processing module;

[0008] The dynamic scaling module is used to simulate the relative motion relationship between the SAR payload and the target scene, and to collect echo data of the target area;

[0009] The display, control and processing module (1) is used for echo data SAR imaging, scene matching, display and control.

[0010] The dynamic scaling module comprises: an electric guide rail (3), a data acquisition card (4), a millimeter wave radar sensor (5), and a stepping motor (6);

[0011] The millimeter wave radar sensor (5) and the data acquisition card (4) constitute a radar front end, are installed on the electric guide rail (3), and are driven to realize horizontal movement by the stepping motor (6).

[0012] The SAR scene matching verification system further comprises a power module (2), which provides power for the radar front end and the stepping motor (6).

[0013] The display control and processing module (1) controls the millimeter wave radar sensor (5) and the data acquisition card (4) on the electric guide rail (3) to move horizontally by parameter configuration, and the radar beam (8) is used to detect and collect data of the real-time image area (9) in the scaled simulation scene (7), and the display control and processing module (1) performs SAR imaging processing on the radar echo collected by the data acquisition card (4) to obtain a SAR real-time image.

[0014] The display control and processing module (1) controls the millimeter wave radar sensor (5) and the data acquisition card (4) on the electric guide rail (3) to move horizontally by parameter configuration, and the radar beam (8) is used to detect and collect data of the real-time image area (9) in the scaled simulation scene (7), and the display control and processing module (1) performs SAR imaging processing on the radar echo collected by the data acquisition card (4) to obtain a SAR real-time image.

[0015] The display control and processing module (1) performs SAR scene matching processing to complete matching of the SAR real-time image and the SAR reference image, and displays the matching result on the display control interface, thereby completing scaled verification of the SAR scene matching technology.

[0016] The millimeter wave radar sensor (5) is designed based on a car radar chip AWR 1443, has high integration, low cost, small volume and low power consumption, the data acquisition card (4) is designed based on DCA1000 and is a multi-channel data acquisition card matched with the car radar chip, the electric guide rail platform composed of the electric guide rail (3) and the stepping motor (6) is controlled by an AMC4030 control card, the millimeter wave radar sensor (5) and the data acquisition card (4) are connected by a high-speed linker and are used for radar data collection, and are jointly arranged in a case to constitute a simulated SAR load radar front end, the radar front end is arranged on the electric guide rail (3), movement of the radar front end on the electric guide rail (3) simulates the required azimuth movement in radar detection, and the dynamic scaled module performs SAR imaging on the laid scaled scene through movement of the millimeter wave radar sensor (5) on the electric guide rail (3), and the SAR reference image and the SAR real-time image can be obtained according to parameter setting of the display control and processing module (1).

[0017] The display control and processing module (1) is connected with the data acquisition card (4) in the dynamic scaling module through a gigabit Ethernet, and is used for receiving radar echo data acquired by the dynamic scaling module.

[0018] The power module (2) provides power for the dynamic scaling module and the display control and processing module (1).

[0019] (Three) beneficial effects

[0020] Compared with the prior art, the scaling verification system of the application adopts a millimeter wave radar sensor, has small volume, low power consumption and high integration; the scaling verification system of the application adopts an electric guide rail platform to simulate the relative motion of the radar and the target, and the test is simple and reliable; the scaling verification system of the application has flexible configuration capability, can collect SAR reference maps and SAR real-time maps according to parameter settings, has low test cost and high verification efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The figure is a composition block diagram of the SAR scene matching scaling verification system of the embodiment of the application.

[0022] Figure 2 The figure is a schematic diagram of the SAR scene matching scaling verification system of the embodiment of the application.

[0023] Figure 2 1. display control and processing module, 2. power module, 3. electric guide rail, 4. data acquisition card, 5. millimeter wave radar sensor, 6. stepping motor, 7. scaling simulation scene, 8. radar beam, 9. real-time map area. Among them, 3, 4, 5 and 6 constitute a dynamic scaling module. DETAILED DESCRIPTION

[0024] In order to make the purpose, content and advantages of the application more clear, the specific embodiments of the application are further described in detail below in combination with the drawings and examples.

[0025] In order to solve the above technical problems, the application provides a SAR scene matching scaling verification system, which comprises a dynamic scaling module and a display control and processing module.

[0026] The dynamic scaling module is used for simulating the relative motion relationship between a SAR load and a target scene, and collecting target area echo data.

[0027] The display control and processing module (1) is used for echo data SAR imaging, scene matching, display and control.

[0028] The dynamic scaling module comprises: an electric guide rail (3), a data acquisition card (4), a millimeter wave radar sensor (5), and a stepping motor (6);

[0029] The millimeter wave radar sensor (5) and the data acquisition card (4) form a radar front end, which is installed on an electric guide rail (3) and driven by a stepping motor (6) to achieve horizontal movement.

[0030] The SAR scene matching scaling verification system further comprises a power module (2); the power module (2) provides power to the radar front end and the stepping motor (6).

[0031] The display control and processing module (1) controls the stepper motor (6) to drive the millimeter wave radar sensor (5) and the data acquisition card (4) on the electric guide rail (3) to move horizontally through parameter configuration, performs radar detection and data acquisition on the real-time image area (9) in the scaled simulation scene (7) through the radar beam (8), and performs SAR imaging processing on the radar echo obtained by the data acquisition card (4) to obtain a SAR real-time image.

[0032] The display control and processing module (1) controls the stepping motor (6) to drive the millimeter wave radar sensor (5) and the data acquisition card (4) on the electric guide rail (3) to perform reciprocating horizontal motion through parameter configuration, performs multiple strip radar detections and data acquisition on the scaled simulation scene 7 through the radar beam (8), and the display control and processing module (1) performs SAR imaging processing on the multiple groups of radar echoes obtained by the data acquisition card (4) to obtain a SAR reference image of the entire scaled simulation scene (7).

[0033] The display control and processing module (1) completes the matching of the SAR real-time image and the SAR reference image through SAR scene matching processing, and displays the matching result on the display control interface, thereby completing the scale verification of the SAR scene matching technology.

[0034] The millimeter-wave radar sensor (5) is designed based on the automotive radar chip AWR 1443, and has high integration, low cost, small size and power consumption; the data acquisition card (4) is designed based on the DCA1000, and is a multi-channel data acquisition card supporting the automotive radar chip; the electric guide rail platform composed of the electric guide rail (3) and the stepping motor (6) adopts the AMC4030 control card for motion control; the millimeter-wave radar sensor (5) and the data acquisition card (4) are connected through a high-speed linker for radar data acquisition, and are placed together in a chassis to form a set of simulated SAR payload radar front ends; the radar front end is placed on the electric guide rail (3), and the movement of the radar front end on the electric guide rail (3) simulates the azimuth movement required for synthetic aperture during radar detection; the dynamic scaling module performs SAR imaging on the scaled scene through the movement of the millimeter-wave radar sensor (5) on the electric guide rail (3), and can obtain SAR reference images and SAR real-time images according to the parameter settings of the display control and processing module (1).

[0035] The display control and processing module (1) is connected to a data acquisition card (4) in the dynamic scaling module via Gigabit Ethernet and is used to receive radar echo data acquired by the dynamic scaling module; the display control and processing module (1) has the functions of parameter configuration, SAR imaging processing, SAR scene matching processing, control and display.

[0036] The power supply module (2) provides power to the dynamic scaling module and the display control and processing module (1).

[0037] Example 1

[0038] In this embodiment, the SAR scene matching scaling verification system includes a dynamic scaling module, a display control and processing module 1, and a power supply module 2, wherein the dynamic scaling module includes an electric guide rail 3, a data acquisition card 4, a millimeter wave radar sensor 5, and a stepper motor 6.

[0039] like Figure 2 As shown, the millimeter-wave radar sensor 5 and the data acquisition card 4 constitute the radar front end, which is mounted on the electric guide rail 3 and driven by the stepper motor 6 to achieve horizontal movement. The power module 2 provides power to the radar front end and the stepper motor 6.

[0040] The display, control and processing module 1 controls the stepper motor 6 to drive the millimeter-wave radar sensor 5 and the data acquisition card 4 on the electric guide rail 3 to move horizontally through parameter configuration, and performs radar detection and data acquisition on the real-time image area 9 in the scaled simulation scene 7 through the radar beam 8. The display, control and processing module 1 performs SAR imaging processing on the radar echo obtained by the data acquisition card 4 to obtain a SAR real-time image.

[0041] The display, control and processing module 1 controls the stepper motor 6 to drive the millimeter-wave radar sensor 5 and the data acquisition card 4 on the electric guide rail 3 to perform reciprocating horizontal motion through parameter configuration, and performs multiple strip radar detections and data acquisition on the scaled simulation scene 7 through the radar beam 8. The display, control and processing module 1 performs SAR imaging processing on the multiple groups of radar echoes obtained by the data acquisition card 4 to obtain a SAR reference image of the entire scaled simulation scene 7.

[0042] The display control and processing module 1 completes the matching of the SAR real-time image and the SAR reference image through SAR scene matching processing, and displays the matching result on the display control interface to complete the scale verification of the SAR scene matching technology.

[0043] 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 technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A SAR scene matching scaling verification system, characterized in that: The SAR scene matching scaling verification system includes: a dynamic scaling module, a display control and processing module; The dynamic scaling module is used to simulate the relative motion relationship between the SAR payload and the target scene, and to collect echo data of the target area; The display control and processing module (1) is used for echo data SAR imaging, scene matching, display and control.

2. The SAR scene matching scaling verification system according to claim 1, wherein: The dynamic scaling module comprises: an electric guide rail (3), a data acquisition card (4), a millimeter wave radar sensor (5), and a stepping motor (6).

3. The SAR scene matching scaling verification system according to claim 2, wherein: The millimeter wave radar sensor (5) and the data acquisition card (4) form a radar front end, which is installed on an electric guide rail (3) and driven by a stepping motor (6) to achieve horizontal movement.

4. The SAR scene matching scaling verification system according to claim 3, wherein: The SAR scene matching scaling verification system further comprises a power module (2); the power module (2) provides power to the radar front end and the stepping motor (6).

5. The SAR scene matching scaling verification system according to claim 3, wherein: The display control and processing module (1) controls a stepper motor (6) to drive a millimeter wave radar sensor (5) and a data acquisition card (4) on an electric guide rail (3) to perform horizontal movement through parameter configuration, performs radar detection and data acquisition on a real-time image area (9) in a scaled simulation scene (7) through a radar beam (8), and performs SAR imaging processing on the radar echo obtained by the data acquisition card (4) to obtain a SAR real-time image.

6. The SAR scene matching scaling verification system according to claim 5, wherein: The display control and processing module (1) controls the stepping motor (6) to drive the millimeter wave radar sensor (5) and the data acquisition card (4) on the electric guide rail (3) to perform reciprocating horizontal motion through parameter configuration, and performs multiple strip-type radar detection and data acquisition on the scaled-down simulation scene 7 through the radar beam (8). The display control and processing module (1) performs SAR imaging processing on the multiple groups of radar echoes obtained by the data acquisition card (4) to obtain a SAR reference image of the entire scaled-down simulation scene (7).

7. The SAR scene matching scaling verification system according to claim 6, wherein: The display control and processing module (1) completes the matching of the SAR real-time image and the SAR reference image through SAR scene matching processing, and displays the matching result on the display control interface, thereby completing the scale verification of the SAR scene matching technology.

8. The SAR scene matching scaling verification system according to claim 7, wherein: The millimeter wave radar sensor (5) is designed based on the automotive radar chip AWR 1443, and has high integration, low cost, small size and power consumption; the data acquisition card (4) is designed based on the DCA1000, and is a multi-channel data acquisition card supporting the automotive radar chip; the electric guide rail platform composed of the electric guide rail (3) and the stepping motor (6) adopts the AMC4030 control card for motion control; the millimeter wave radar sensor (5) and the data acquisition card (4) are connected through a high-speed linker for radar data acquisition, and are placed together in a chassis to form a set of simulated SAR payload radar front end; The radar front end is placed on an electric guide rail (3), and the movement of the radar front end on the electric guide rail (3) simulates the azimuth movement required for synthetic aperture during radar detection; the dynamic scaling module performs SAR imaging on the scaled scene arranged through the movement of the millimeter wave radar sensor (5) on the electric guide rail (3), and can obtain a SAR reference image and a SAR real-time image according to the parameter setting of the display control and processing module (1).

9. The SAR scene matching scaling verification system according to claim 8, wherein: The display control and processing module (1) is connected to a data acquisition card (4) in the dynamic scaling module via Gigabit Ethernet and is used to receive radar echo data acquired by the dynamic scaling module; the display control and processing module (1) has the functions of parameter configuration, SAR imaging processing, SAR scene matching processing, control and display.

10. The SAR scene matching scaling verification system according to claim 9, wherein: The power supply module (2) provides power to the dynamic scaling module and the display control and processing module (1).

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