Space-based infrared detection of aerospace high-speed target pulse vision payload processing system and method

Abstract

Space-based infrared detection of aerospace high-speed target pulse vision payload processing system and method. The payload processing system includes a temperature control component, a cryogenic lens component, a short-wave pulse vision detector component, a focal plane cooler component, a pulse processing circuit component, and a light shield component. By enabling each pixel in the collected salient data to independently record the light change on its own instead of imaging together at a specific moment, all pixels are arranged in a spatial layout to form a signal flow array, accurately depicting the physical process of light change over a period of time collected. This breaks through the limitations of the traditional detector signal acquisition method, A / D conversion, readout method, etc., can greatly improve the time sensitivity of detecting targets and events, has a higher frame rate, and has the ability to generate intelligent information.

Description

Technical Field

[0001] The present invention relates to a pulsed vision payload processing system and method for space-based infrared detection of aerospace high-speed targets, and belongs to the field of space-based infrared detection. Background Technique

[0002] At present, the threats faced by our country are becoming increasingly complex and severe. High-threat weapons represented by aerospace high-speed moving targets have become the main threats in the military game among major powers. Therefore, powerful detection means are needed to ensure national security. Compared with traditional ground-based radar systems, space-based infrared detection systems have great advantages in terms of rapid response ability, space coverage ability, anti-clutter interference, deployment flexibility, concealment, survival and anti-destruction ability. Therefore, space-based infrared detection has become the main means of providing key target indication.

[0003] The current space-based infrared detection system can achieve continuous monitoring and tracking of high-speed moving targets globally. However, in the face of aerospace kill weapons with characteristics of high-speed changes in trajectory, speed, and radiation energy, existing traditional infrared detectors are limited by signal acquisition methods, A / D conversion, readout methods, etc., and it is difficult to achieve high-precision detection. Summary of the Invention

[0004] The technical problem solved by the present invention is: aiming at the defects of traditional infrared detectors in the aspects of acquisition method, readout method, detection accuracy, and data processing ability in the current existing technologies, a pulsed vision payload processing system and method for space-based infrared detection of aerospace high-speed targets are proposed.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A pulsed vision payload processing system for space-based infrared detection of aerospace high-speed targets includes a temperature control component, a cryogenic lens component, a short-wave pulsed vision detector component, a focal plane cooler component, a pulsed processing circuit component, and a sunshade component, wherein:

[0007] The low-temperature lens assembly converges the ground object information within the detection area into an incident signal and sends it to the short-wave pulsed vision detector assembly. The focal plane cooler assembly provides a low-temperature environment for the short-wave pulsed vision detector assembly. The short-wave pulsed vision detector assembly receives the incident signal from the low-temperature lens assembly, samples the target signal within the detection area, and converts it into a pulsed electrical signal, which is input to the pulse processing circuit assembly. The pulse processing circuit assembly receives the pulsed electrical signal, performs real-time processing, and reconstructs the target image data. The temperature control assembly is used to precisely control the temperature of the low-temperature lens assembly, the short-wave pulsed vision detector assembly, the focal plane cooler assembly, and the pulse processing circuit assembly. The light shield assembly is arranged at the front end of the low-temperature lens assembly to provide temperature control protection for the payload processing system composed of the temperature control assembly, the low-temperature lens assembly, the short-wave pulsed vision detector assembly, the focal plane cooler assembly, and the pulse processing circuit assembly.

[0008] The light barrier surface of the light shield assembly is coated with a multi-layer thermal insulation assembly to reduce the influence of solar heat flux on the temperature of the light barrier. The outermost layer of the multi-layer thermal insulation assembly uses a black polyimide carburized film to meet the requirements of stray light elimination. The outer wall of the outermost layer is sprayed with ERB-2 white paint to reduce the solar emissivity and at the same time reduce the difficulty of thermal control.

[0009] The short-wave pulsed vision detector assembly and the focal plane cooler assembly jointly form a detector. In the refrigeration environment provided by the focal plane cooler assembly, it receives the external timing signal and the incident signal sent by the low-temperature lens assembly, samples the target signal within the detection area, and serially outputs the converted pulsed electrical signal according to the preset timing. The focal plane cooler assembly measures the temperature of the focal plane in real time and precisely controls the temperature under the control of the temperature control assembly.

[0010] The pulse processing circuit assembly receives the pulsed electrical signal output by the detector, extracts the differential analog image signal from the pulsed electrical signal, independently records the light change for each pixel in the differential analog image signal, and arranges all pixels into a signal stream array according to the spatial layout for image processing, and obtains the target image data for external output through satellite data transmission.

[0011] Image processing includes filter transformation processing and A / D conversion.

[0012] The short-wave pulsed vision detector assembly can detect the short and medium wave infrared spectral bands. The focal plane cooler assembly uses a mechanical cooler to obtain image data with a frame rate of 1000 Hz.

[0013] The low-temperature lens assembly uses an RC+ correction lens, with the focal length set to 525 mm ± 10 mm; the effective entrance pupil diameter is set to 150 mm; the field of view angle 2ω is set to 1.1°×0.9°; the working spectral range is set to 2.6 μm to 3.2 μm.

[0014] It also includes a secondary power supply for powering the pulse processing circuit components. The temperature control component, cryogenic lens component, short-wave pulse vision detector component, and focal plane cooler component are all powered by an external satellite power supply.

[0015] The short-wave pulse vision detector component uses a 640×512 short-wave infrared pulse detector to enhance the ability to capture transient events, and adopts a micro-dewar detector packaging technology to reduce the cooling requirement.

[0016] A method for processing a pulsed vision payload for space-based infrared detection of aerospace high-speed targets includes:

[0017] Build a payload processing system including a temperature control component, a cryogenic lens component, a short-wave pulse vision detector component, a focal plane cooler component, a pulse processing circuit component, a light shield component, and a secondary power supply;

[0018] The external satellite power supply powers the payload processing system, the secondary power supply independently powers the pulse processing circuit component, the temperature control component and the focal plane cooler component perform temperature control to provide a temperature environment for the payload processing system, and the light shield component protects the payload processing system;

[0019] The cryogenic lens component converges the ground object information in the detection area into an incident signal and sends it to the short-wave pulse vision detector component;

[0020] The short-wave pulse vision detector component receives the incident signal from the cryogenic lens component, samples and responds to the target signal in the detection area, converts it into a pulsed electrical signal, and inputs it into the pulse processing circuit component;

[0021] The pulse processing circuit component receives the converted pulsed electrical signal, performs real-time processing, reconstructs the target image data, and transmits it outward through the satellite data transmission interface.

[0022] The advantages of the present invention compared with the prior art are as follows:

[0023] The space-based infrared detection aerospace high-speed target pulsed vision payload processing system and method provided by the present invention break through the limitations of the traditional detector signal acquisition method, A / D conversion, readout method, etc., meet the requirements of space-based payloads for high detection sensitivity, high frame rate, and massive data real-time processing capabilities, adopt the pulsed vision time-sensitive target detection technology to achieve "detection-inspection" integration at the payload end, convert the traditional data stream into an information stream, and realize the tactical-level application of the space-based infrared detection system. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the payload processing system provided by the invention;

[0025] Figure 2 It is a schematic diagram of the cryogenic lens component provided by the invention;

[0026] Figure 3 Payload camera assembly provided for the invention Detailed implementation manners

[0027] A space-based infrared detection space-air high-speed target pulsed vision payload processing system and method are used to solve the problems of insufficient dynamic range, insufficient spatial resolution and frame rate, insufficient radiation resolution, and insufficient data real-time processing ability in the current space-based infrared detection application with traditional detection systems. It breaks through the limitations of the signal acquisition method, A / D conversion, readout method, etc. of the traditional detector, and meets the requirements of space-based payloads for high detection sensitivity, high frame rate, and real-time processing ability of massive data. The following is a further description according to specific embodiments:

[0028] The specific structure of the payload processing system is as follows: It includes a temperature control component, a cryogenic lens component, a short-wave pulsed vision detector component, a focal plane cooler component, a pulsed processing circuit component, and a baffle component. The cryogenic lens component converges the ground object information in the detection area into an incident signal and sends it to the short-wave pulsed vision detector component. The focal plane cooler component provides a low-temperature environment for the short-wave pulsed vision detector component. The short-wave pulsed vision detector component receives the incident signal from the cryogenic lens component, samples and responds to the target signal in the detection area, and converts it into a pulsed electrical signal, which is input to the pulsed processing circuit component; the pulsed processing circuit component receives the converted pulsed electrical signal for real-time processing and reconstructs the target image data. The temperature control component is used to accurately control the temperature of the cryogenic lens component, the short-wave pulsed vision detector component, the focal plane cooler component, and the pulsed processing circuit component. The baffle component is arranged at the front end of the cryogenic lens component to provide temperature control protection for the payload processing system composed of the temperature control component, the cryogenic lens component, the short-wave pulsed vision detector component, the focal plane cooler component, and the pulsed processing circuit component;

[0029] It further includes a secondary power supply for supplying power to the pulsed processing circuit component. The temperature control component, the cryogenic lens component, the short-wave pulsed vision detector component, and the focal plane cooler component are all powered by an external satellite power supply.

[0030] Among them, the inner wall of the baffle component is coated with a 10-unit multi-layer thermal insulation component on the upper surface of the baffle of the baffle component to reduce the influence of solar heat flux on the temperature of the baffle. The outermost layer of the multi-layer component uses a black polyimide carburized film to meet the requirements of stray light elimination; the outer wall is sprayed with ERB-2 white paint to reduce the solar emissivity and at the same time reduce the difficulty of thermal control.

[0031] The short-wave pulse vision detector assembly and the focal plane cooler assembly together form a detector. In the cooling environment provided by the focal plane cooler assembly, it receives external timing signals and incident signals sent by the cryogenic lens assembly, samples and responds to target signals in the detection area, and serially outputs the converted pulse electrical signals according to the preset timing. The focal plane cooler assembly measures the temperature of the focal plane in real time and accurately controls the temperature under the control of the temperature control component;

[0032] The pulse processing circuit assembly receives the pulse electrical signals output by the detector, extracts differential analog image signals and performs filtering transformation processing and A / D conversion, and outputs the obtained target image data outward through satellite data transmission;

[0033] The short-wave pulse vision detector assembly is set with a short- and medium-wave infrared spectral band, which can obtain information on target reflection and self-radiation energy. The focal plane cooler assembly uses a mechanical cooler to obtain image data with a frame rate of 1000 Hz;

[0034] As Figure 2 shown, the cryogenic lens assembly uses an RC+ correction lens, with a focal length set to 525 mm ± 10 mm; the effective entrance pupil diameter is set to 150 mm; the field of view angle 2ω is set to 1.1° × 0.9°; the working spectral band range is set to 2.6 μm to 3.2 μm;

[0035] The short-wave pulse vision detector assembly uses a 640×512 short-wave infrared pulse detector to improve the ability to obtain transient events, and uses a micro-dewar detector packaging technology to reduce the cooling requirement;

[0036] The pulse processing circuit assembly is preset with a pulse vision detection function algorithm. The pulse vision detection function algorithm independently records the light changes for each pixel in the differential analog image signal, arranges all pixels in a spatial layout to form a signal stream array, and performs image processing to obtain target image data and transmit it outward.

[0037] The specific process of load processing according to the load processing system is as follows:

[0038] Build a load processing system including a temperature control component, a cryogenic lens assembly, a short-wave pulse vision detector assembly, a focal plane cooler assembly, a pulse processing circuit assembly, a light shield assembly, and a secondary power supply;

[0039] The external satellite power supplies power to the load processing system, the secondary power supply independently powers the pulse processing circuit assembly, the temperature control component and the focal plane cooler assembly control the temperature to provide a temperature environment for the load processing system, and the load processing system is protected through the light shield assembly;

[0040] The cryogenic lens assembly converges the ground object information in the detection area into an incident signal and sends it to the short-wave pulse vision detector assembly;

[0041] The short-wave pulse vision detector assembly receives the incident signal of the cryogenic lens assembly, samples and responds to the target signal in the detection area, converts it into a pulsed electrical signal, and inputs it to the pulse processing circuit assembly;

[0042] The pulse processing circuit assembly receives the converted pulsed electrical signal, performs real-time processing, reconstructs the target image data, and transmits it outward through the satellite data transmission interface.

[0043] Specifically, the payload processing system, that is, the specific structural composition of the payload camera is as Figure 1 shown. The overall hardware structure adopts a compact catadioptric design, reducing the consumption of volume and weight resources. The cryogenic lens assembly can collect energy and converge the effective information within the band onto the focal plane, as Figure 3 shown. When the payload camera is installed, it also needs to be supported according to the primary mirror assembly and secondary mirror assembly in the cryogenic lens assembly, in cooperation with the main bearing plate and main bearing support columns, and data is stored through the video box. After the camera is built, it is placed on the turntable, which can achieve observations within a visible range of 360° in the azimuth direction and from the sub-satellite point to the limb at a height of 100 km in the pitch direction. It is also equipped with a lens cooler and an infrared video processor, which are distributed along the periphery of the camera together with the focal plane cooler assembly and the secondary power supply, and are respectively fixed on both sides of the main frame of the payload camera.

[0044] The pulse vision payload processing system and method can solve the problems of insufficient dynamic range, insufficient spatial resolution and frame rate, insufficient radiation resolution, and insufficient data real-time processing ability in the current space-based infrared detection application with traditional detection systems. It breaks through the limitations of the signal acquisition method, A / D conversion, readout method, etc. of traditional system detectors, and meets the requirements of space-based payloads for high detection sensitivity, high frame rate, and the ability to process a large amount of data in real time.

[0045] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention all belong to the protection scope of the technical solution of the present invention.

[0046] The content not detailedly described in the specification of the present invention belongs to the well-known technology of those skilled in the art.

Claims

1. A pulsed vision payload processing system for space-based infrared detection of aerospace high-speed targets, characterized in that: It includes a temperature control component, a cryogenic lens component, a short-wave pulse vision detector component, a focal plane cooler component, a pulse processing circuit component, and a light shield component, where: The cryogenic lens component converges the ground object information within the detection area into an incident signal and sends it to the short-wave pulse vision detector component. The focal plane cooler component provides a cryogenic environment for the short-wave pulse vision detector component. The short-wave pulse vision detector component receives the incident signal from the cryogenic lens component, samples the target signal within the detection area, and converts it into a pulsed electrical signal, which is input to the pulse processing circuit component. The pulse processing circuit component receives the pulsed electrical signal for real-time processing and reconstructs the target image data. The temperature control component is used to precisely control the temperature of the cryogenic lens component, the short-wave pulse vision detector component, the focal plane cooler component, and the pulse processing circuit component. The light shield component is arranged at the front end of the cryogenic lens component to provide temperature control protection for the payload processing system composed of the temperature control component, the cryogenic lens component, the short-wave pulse vision detector component, the focal plane cooler component, and the pulse processing circuit component.

2. The pulsed vision payload processing system for space-based infrared detection of aerospace high-speed targets according to claim 1, characterized in that: The light barrier surface of the light shield component is coated with multiple layers of heat insulation components to reduce the influence of solar heat flux on the temperature of the light barrier. The outermost layer of the multiple layers of heat insulation components uses a black polyimide carburized film to meet the requirements of stray light elimination. The outer wall of the outermost layer is sprayed with ERB-2 white paint to reduce the solar emissivity and simultaneously reduce the difficulty of thermal control.

3. The pulsed vision payload processing system for space-based infrared detection of aerospace high-speed targets according to claim 1, characterized in that: The short-wave pulse vision detector component and the focal plane cooler component jointly form a detector. In the refrigeration environment provided by the focal plane cooler component, it receives external timing signals and the incident signal sent by the cryogenic lens component, samples the target signal within the detection area, and serially outputs the converted pulsed electrical signal according to the preset timing. The focal plane cooler component measures the temperature of the focal plane in real time and precisely controls the temperature under the control of the temperature control component.

4. The pulsed vision payload processing system for space-based infrared detection of aerospace high-speed targets according to claim 1, characterized in that: The pulse processing circuit component receives the pulsed electrical signal output by the detector, extracts the differential analog image signal from the pulsed electrical signal, independently records the light change for each pixel in the differential analog image signal, and forms a signal stream array by arranging all the pixels in a spatial layout for image processing, and obtains the target image data for external output through satellite data transmission.

5. The pulsed vision payload processing system for space-based infrared detection of aerospace high-speed targets according to claim 4, characterized in that: Image processing includes filter transformation processing and A / D conversion.

6. The pulsed vision payload processing system for space-based infrared detection of aerospace high-speed targets according to claim 1, characterized in that: The short-wave pulse vision detector component can detect the short and medium wave infrared spectral bands, and the focal plane cooler component uses a mechanical cooler to obtain image data with a frame rate of 1000 Hz.

7. The pulsed vision payload processing system for space-based infrared detection of aerospace high-speed targets according to claim 1, characterized in that: The cryogenic lens component uses an RC+ correction lens, with the focal length set to 525 mm ± 10 mm; the effective entrance pupil diameter is set to 150 mm; the field of view angle 2ω is set to 1.1°×0.9°; the working spectral band range is set to 2.6 μm to 3.2 μm.

8. The pulsed vision payload processing system for space-based infrared detection of aerospace high-speed targets according to claim 1, characterized in that: It also includes a secondary power supply for supplying power to the pulse processing circuit component. The temperature control component, the cryogenic lens component, the short-wave pulse vision detector component, and the focal plane cooler component are all powered by an external satellite power supply.

9. The pulsed vision payload processing system for space-based infrared detection of aerospace high-speed targets according to claim 1, characterized in that: The short-wave pulse vision detector component uses a 640×512 short-wave infrared pulse detector to improve the ability to capture transient events, and uses a micro-dewar detector packaging technology to reduce the cryogenic demand.

10. A method for processing a pulsed vision payload for space-based infrared detection of aerospace high-speed targets implemented by the pulsed vision payload processing system according to claim 9, characterized in that It includes: Build a payload processing system including a temperature control component, a cryogenic lens component, a short-wave pulse vision detector component, a focal plane cooler component, a pulse processing circuit component, a light shield component, and a secondary power supply; The external satellite power supply powers the payload processing system, the secondary power supply independently powers the pulse processing circuit component, the temperature control component and the focal plane cooler component control the temperature to provide a low-temperature environment for the payload processing system, and the light shield component protects the payload processing system; The cryogenic lens component converges the ground object information in the detection area into an incident signal and sends it to the short-wave pulse vision detector component; The short-wave pulse vision detector component receives the incident signal from the cryogenic lens component, samples and responds to the target signal in the detection area, converts it into a pulsed electrical signal, and inputs it into the pulse processing circuit component; The pulse processing circuit component receives the converted pulsed electrical signal, performs real-time processing, reconstructs the target image data, and transmits it outward through the satellite data transmission interface.

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