Infrared target searching identification and tracking test system and method

Abstract

The invention provides an infrared target searching identification and tracking test system. The system comprises a data receiving function module which receives different data information and parameters; the target motion model building function module is used for outputting the position of the moving target at any moment; the target image simulation function module is used for establishing a projection model, projecting the moving target position to an image surface and generating a target image according to a projection result; the image framing function module is used for framing a pure image of the target image and then outputting image data which contains auxiliary data and conforms to a satellite protocol; the data output function module is used for sending framed image data to the information processor and sending a target position and time to attitude and orbit control ground measurement equipment; and the display and processing function module is used for displaying images. According to the invention, a moving image of a typical moving target under a single background can be simulated, image simulation data are dynamically generated, and a hardware interface is called to complete data receiving and sending.

Description

Technical Field

[0001] The invention relates to a special test equipment system, in particular to an infrared target search, identification and tracking test system and method. Background Art

[0002] In order to test the satellite's target search, identification, guidance and tracking functions, it is necessary to develop an infrared target search, identification and tracking test equipment, access the satellite's attitude, orbit, two-dimensional swing mirror and other information, simulate the moving images of several typical moving targets against a single background, and cooperate with the satellite's infrared target search, identification and tracking function ground testing and verification.

[0003] In a Chinese patent document with publication number CN103698144A, a satellite payload and data transmission test system with a graded test function is disclosed. The satellite payload data loader mentioned in this method is only used for standard image generation, and does not introduce information such as satellite attitude, orbit and two-dimensional swing mirror. It is essentially different from the test equipment and cannot be used to simulate mobile targets in typical scenarios. It cannot perform ground testing and verification of satellite-ground closed-loop target search, identification and tracking functions.

[0004] In the Chinese patent document with publication number CN107957894A, a method and device for image loading are disclosed. The method realizes the loading of the target image by calling the loading program required to load the target image in the target image loading library class. The device is essentially different from the test equipment and also does not introduce information such as satellite attitude, orbit and two-dimensional swing mirror. It cannot be used to simulate mobile targets in typical scenarios and cannot perform satellite-ground closed-loop testing.

[0005] In the Chinese patent document with publication number CN107274460A, a full-spectrum hyperspectral image simulation method and device are disclosed, which realizes the simulation of remote sensing data of the optical full spectrum. The device is essentially different from the test equipment and cannot be used to simulate moving targets in typical scenarios. It cannot interact with satellites for data to realize ground testing and verification of target search, identification and tracking functions.

[0006] In the Chinese patent document with publication number CN102116643A, a high-resolution wide-coverage space camera image simulation display device is disclosed, which simulates the on-orbit working mode, workflow and output image data of the space camera, and provides an effective testing method for the research of high-resolution wide-coverage space cameras. This device is essentially different from the test equipment, and cannot be used to simulate moving targets in typical scenarios, and cannot perform satellite-ground closed-loop testing.

[0007] In the Chinese patent document with publication number CN101604017, a method for realizing remote sensing image simulation under given exterior orientation elements is disclosed. This method solves the problem of high-precision simulation of remote sensing images by exterior orientation elements and field of view angle under given sensor position and posture. This method is essentially different from the test equipment and cannot be used to simulate mobile targets in typical scenarios, and cannot perform ground testing and verification of target search, recognition and tracking functions.

[0008] Therefore, a system and method for infrared target search, identification and tracking test is needed. Summary of the invention

[0009] In view of the defects in the prior art, the object of the present invention is to provide an infrared target search, identification and tracking test system.

[0010] An infrared target search, identification and tracking test system provided by the present invention comprises:

[0011] Data receiving function module: receiving different data information and parameters through preset interfaces;

[0012] Target motion model establishment function module: output the position of the moving target at any time according to the received information and parameters;

[0013] Target image simulation function module: establish a projection model, project the moving target position onto the image plane, and generate the target image based on the projection result;

[0014] Image framing function module: intercepts and processes data according to the camera image auxiliary data format protocol, frames the pure image of the target image, and outputs image data that conforms to the satellite protocol and contains auxiliary data;

[0015] Data output function module: sends the framed image data to the information processor through the LVDS interface, and sends the target position and time to the attitude and orbit control ground measurement equipment through the Ethernet port;

[0016] Display and processing function module: used to display satellite, satellite pointing, target and simulated projection model images.

[0017] Preferably, the information and parameters received by the data receiving function module include:

[0018] Attitude and orbit information sent by attitude and orbit control computers; high-frequency attitude and orbit information sent by attitude and orbit control ground measurement equipment; pointing parameters of the swing mirror sent by the information processor or two-dimensional mechanism;

[0019] The information and parameters apply to the same interface corresponding to two different protocols.

[0020] Preferably, the target motion model establishment function module includes:

[0021] The moving target motion model can adjust the model by setting the parameters of the target's starting position, flight state, flight altitude, flight speed, acceleration, and heading;

[0022] The size of the target can be adjusted according to actual needs.

[0023] Preferably, the target image simulation function module includes:

[0024] The target is filled with a specified gray value, and the background is filled with a specified constant value;

[0025] When the moving target exceeds the field of view, the image is completely filled with a specified constant value of the background, and a prompt sign is issued;

[0026] The number of pixels occupied by the target and the background gray value can be adjusted;

[0027] The target image is generated at a frequency of 20 Hz based on the high-frequency satellite orbit and attitude parameters sent by the attitude and orbit control ground measurement equipment and the camera swing mirror pointing parameters sent by the information processor.

[0028] Preferably, the image framing function module includes:

[0029] After adding auxiliary information of time mark, spectrum and satellite attitude orbit to the pure image, it is output;

[0030] The timing of the intercepted data is consistent with the timing of the camera, which includes the attitude and orbit parameters sent by the attitude and orbit control computer at each moment and the swing mirror pointing information sent by the information processor.

[0031] Preferably, the display and processing function module includes: real-time data monitoring and data storage and playback functions.

[0032] Preferably, the system has two working modes: remote control and local control, wherein the device normally works in the remote control mode, and the local control mode serves as a working backup.

[0033] A method for applying an infrared target search, recognition and tracking test system, comprising:

[0034] Data receiving function steps: receiving different data information and parameters through the preset interface;

[0035] Functional steps for establishing the target motion model: output the position of the moving target at any time based on the received information and parameters;

[0036] Target image simulation function steps: establish a projection model, project the moving target position onto the image plane, and generate the target image based on the projection result;

[0037] Image framing function steps: intercept and process data according to the camera image auxiliary data format protocol, frame the pure image of the target image, and output image data that conforms to the satellite protocol and contains auxiliary data;

[0038] Data output function steps: send the framed image data to the information processor through the LVDS interface, and send the target position and time to the attitude and orbit control ground measurement equipment through the Ethernet port;

[0039] Display and processing function steps: display satellite, satellite pointing, target and simulated projection model images.

[0040] Preferably, the information and parameters received by the data receiving function processing step include:

[0041] Attitude and orbit information sent by attitude and orbit control computers; high-frequency attitude and orbit information sent by attitude and orbit control ground measurement equipment; pointing parameters of the swing mirror sent by the information processor or two-dimensional mechanism;

[0042] The information and parameters apply to the same interface corresponding to two different protocols;

[0043] The target motion model establishment function processing steps include:

[0044] The moving target motion model can adjust the model by setting the parameters of the target's starting position, flight state, flight altitude, flight speed, acceleration, and heading;

[0045] Among them, the size of the target can be adjusted according to actual needs;

[0046] The target image simulation function processing steps include:

[0047] The target is filled with a specified gray value, and the background is filled with a specified constant value;

[0048] When the moving target exceeds the field of view, the image is completely filled with a specified constant value of the background, and a prompt sign is issued;

[0049] The number of pixels occupied by the target and the background gray value can be adjusted;

[0050] The target image is generated at a frequency of 20 Hz based on the high-frequency satellite orbit and attitude parameters sent by the attitude and orbit control ground measurement equipment and the camera swing mirror pointing parameters sent by the information processor.

[0051] Preferably, the image framing function processing steps include:

[0052] After adding auxiliary information of time mark, spectrum and satellite attitude orbit to the pure image, it is output;

[0053] The timing of the intercepted data is consistent with that of the camera, which includes the attitude and orbit parameters sent by the attitude and orbit control computer at each moment and the oscillating mirror pointing information sent by the information processor;

[0054] The display and processing function processing steps include: real-time monitoring, storage and playback of data.

[0055] Compared with the prior art, the present invention has the following beneficial effects:

[0056] 1. The present invention can be applied to the ground test and verification of the satellite's infrared target search, identification and tracking functions. By introducing information such as satellite attitude, orbit and camera two-dimensional swing mirror, the moving image of a typical moving target under a single background is simulated, image simulation data is dynamically generated and the hardware interface is called to complete data reception and transmission;

[0057] 2. The present invention gives full play to the high flexibility of software parameter configuration, while taking into account the high performance of the hardware part and the precise clock control;

[0058] 3. The present invention uses a unified user interface and powerful online help function to provide real-time monitoring management and provide convenience for users; the system configuration is closely integrated with specific functions, making it easy for specific operators to use;

[0059] 4. The present invention adopts component design, and the functional components have good independent working ability, and the modules can be expanded and reorganized; the modular and component design principles are adopted, and users can choose the required components to form application systems of different scales; the processing of new functions and new data types can be easily realized;

[0060] 5. The system solution of the present invention is reliable, flexible in configuration, and can be adapted to a variety of different scenarios, providing greater support for ground testing and verification of infrared target search, identification, and tracking functions;

[0061] 6. In addition to providing image simulation functions, the present invention is also connected to a satellite attitude control system and an onboard information processor, and can complete closed-loop simulation and testing of imaging, detection and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0063] Figure 1 This is an information flow diagram of an infrared target search, identification and tracking test system of the present invention;

[0064] Figure 2 This is a diagram of the internal software and hardware architecture of an infrared target search, identification and tracking test device of the present invention. DETAILED DESCRIPTION

[0065] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0066] The invention introduces an infrared target search, identification and tracking test system, which comprises a data receiving function module, a target motion model building function module, a target image simulation function module, an image framing function module, a data output function module, and a display and processing function module.

[0067] The data receiving function module receives the attitude and orbit information sent by the attitude and orbit control computer (RS422 interface), receives the high-frequency attitude and orbit information sent by the attitude and orbit control ground measurement equipment (dynamic computer) (Ethernet port), receives the swing mirror pointing parameters sent by the information processor or the two-dimensional mechanism, and adapts to the same interface corresponding to two different protocols (RS422 interface);

[0068] The target motion model establishment function module is used to express the position of the mobile target at any time. The mobile target motion model can be adjusted by setting the starting position, flight state (take-off / cruise / landing), flight altitude, flight speed, acceleration, heading, and the target size is adjustable;

[0069] The target image simulation function module is used to establish a projection model, project the moving target onto the image plane, and generate the target image according to the projection result. The target takes the specified gray value and the background is filled with the specified constant value. If the moving target exceeds the field of view, the image is filled with the background constant value and a prompt sign is issued. The number of pixels occupied by the target and the background gray value are adjustable. The image is generated at a frequency of 20Hz according to the high-frequency satellite orbit and attitude parameters sent by the attitude and orbit control ground measurement equipment (dynamic computer).

[0070] The image framing function module frames the received parameters into the image auxiliary data according to the camera image auxiliary data format protocol. Specifically, auxiliary information such as time stamp, spectrum and satellite attitude orbit are added, and the timing of the intercepted data is as consistent as possible with the camera, including the attitude orbit parameters sent by the attitude and orbit control computer and the swing mirror pointing information sent by the information processor;

[0071] The data output function module sends the framed image data to the information processor through the LVDS interface, and sends the target position and time to the attitude and orbit control ground measurement equipment through the Ethernet port;

[0072] The display and processing function module has data monitoring, data storage and playback functions; it can display satellites, satellite pointing, targets and simulated images in real time under the inertial system.

[0073] Test equipment information flow reference Figure 1 As shown, the user uses the front-end display device and simple operations of the mouse and keyboard to realize the basic settings of scene parameters and camera images in the front-end interface provided by the infrared target search, recognition and tracking test equipment. The test equipment simulates the target according to the parameters configured by the user, and at the same time receives the high-frequency satellite attitude and orbit data sent by the dynamics computer and the camera swing mirror pointing parameters sent by the information processor, calculates the projection information of the target on the camera observation surface, dynamically generates the camera image according to the background filling value and target size set by the user, and combines the attitude and orbit information output by the attitude and orbit control computer, and sends it to the information processor after framing in the specified format.

[0074] Reference for internal hardware and software architecture of test equipment Figure 2 As shown in the figure, it consists of two parts: software and hardware. The software part is mainly responsible for human-machine interaction, data processing, dynamic target and dynamic image generation, etc. The hardware is mainly responsible for data interaction with the satellite stand-alone. The software and hardware communicate through driver calls. The test equipment has two working modes: remote control and local control (with the same functions). The equipment generally works in remote control mode, and the local control mode is used as a backup.

[0075] The test system software development mainly includes three main contents, namely data reception and transmission, front-end display and image simulation. The reception and transmission function provides hardware support for data interaction with RS422 and LVDS, as well as data interaction with other devices on the network through common protocols such as TCP. The image simulation thread can simulate the running trajectory and real-time image information of the target, and can modify the real position information of the output target at any time during the movement by setting parameters such as the starting position and speed of the simulation object. The front-end display thread can display real-time scene information by receiving data from the other two threads, and can also replay the scene information at that time by reading the stored historical tasks.

[0076] The present invention also provides an infrared target search, identification and tracking test method, which can be implemented by executing the process steps of the infrared target search, identification and tracking test system, that is, those skilled in the art can understand the infrared target search, identification and tracking test system as a preferred implementation of the infrared target search, identification and tracking test method.

[0077] The method of an infrared target search, identification and tracking test system comprises: a data receiving function step: receiving different data information and parameters through a preset interface; a target motion model establishment function step: outputting the position of a moving target at any time according to the received information and parameters; a target image simulation function step: establishing a projection model, projecting the position of a moving target onto an image plane, and generating a target image according to a projection result; an image framing function step: intercepting and processing data according to a camera image auxiliary data format protocol, framing the pure image of the target image, and outputting image data that complies with a satellite protocol and contains auxiliary data; a data output function step: sending the framed image data to an information processor through an LVDS interface, and sending the target position and time to an attitude, orbit and ground control measurement device through an Ethernet port; and a display and processing function step: displaying satellites, satellite pointing, targets and simulated projection model images.

[0078] Specifically, the information and parameters received by the data receiving function processing step include: attitude and orbit information sent by the attitude and orbit control computer; high-frequency attitude and orbit information sent by the attitude and orbit control ground measurement equipment; swing mirror pointing parameters sent by the information processing machine or the two-dimensional mechanism; the information and parameters are applicable to the same interface corresponding to two different protocols; the target motion model establishment function processing step includes: the mobile target motion model can be adjusted by setting the parameters of the target's starting position, flight status, flight altitude, flight speed, acceleration, and heading; wherein the size of the target can be adjusted according to actual needs; the target image simulation function processing step includes: the target is filled with a specified grayscale value, and the background is filled with a specified constant value; when the mobile target exceeds the field of view, the image is filled with the specified constant value of the background, and a prompt sign is issued at the same time; the number of pixels occupied by the target and the background grayscale value can be adjusted; according to the high-frequency satellite orbit and attitude parameters sent by the attitude and orbit control ground measurement equipment and the camera swing mirror pointing parameters sent by the information processing machine, the target image is generated at a frequency of 20Hz.

[0079] Specifically, the image framing function processing steps include: adding time stamps, spectrum bands and auxiliary information of satellite attitude and orbit to the pure image before outputting it; the timing of the captured data is consistent with the timing of the camera, and the timing includes the attitude and orbit parameters sent by the attitude and orbit control computer at each moment and the swing mirror pointing information sent by the information processor; the display and processing function processing steps include: real-time monitoring, storage and playback of data.

[0080] Those skilled in the art know that, in addition to realizing the system and its various devices, modules, and units provided by the present invention in a purely computer-readable program code, it is entirely possible to realize the same functions in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a hardware component, and the devices, modules, and units included therein for realizing various functions can also be regarded as structures within the hardware component; the devices, modules, and units for realizing various functions can also be regarded as both software modules for realizing the method and structures within the hardware component.

[0081] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. An infrared target search, identification and tracking test system, It is characterized in that include: Data receiving function module: receiving different data information and parameters through preset interfaces; Target motion model establishment function module: output the position of the moving target at any time according to the received information and parameters; Target image simulation function module: establish a projection model, project the moving target position onto the image plane, and generate the target image based on the projection result; Image framing function module: intercepts and processes data according to the camera image auxiliary data format protocol, frames the pure image of the target image, and outputs image data that conforms to the satellite protocol and contains auxiliary data; Data output function module: sends the framed image data to the information processor through the LVDS interface, and sends the target position and time to the attitude and orbit control ground measurement equipment through the Ethernet port; Display and processing function module: used to display satellite, satellite pointing, target and simulated projection model images.

2. The infrared target search, identification and tracking test system according to claim 1, It is characterized in that The information and parameters received by the data receiving function module include: Attitude and orbit information sent by attitude and orbit control computers; high-frequency attitude and orbit information sent by attitude and orbit control ground measurement equipment; pointing parameters of the swing mirror sent by the information processor or two-dimensional mechanism; The information and parameters apply to the same interface corresponding to two different protocols.

3. The infrared target search, identification and tracking test system according to claim 1, It is characterized in that The target motion model establishment function module includes: The moving target motion model can be adjusted by setting the parameters of the target's starting position, flight state, flight altitude, flight speed, acceleration, and heading; The size of the target can be adjusted according to actual needs.

4. The infrared target search, identification and tracking test system according to claim 1, It is characterized in that The target image simulation function module includes: The target is filled with a specified gray value, and the background is filled with a specified constant value; When the moving target exceeds the field of view, the image is completely filled with a specified constant value of the background, and a prompt sign is issued; The number of pixels occupied by the target and the background gray value can be adjusted; The target image is generated at a frequency of 20 Hz based on the high-frequency satellite orbit and attitude parameters sent by the attitude and orbit control ground measurement equipment and the camera swing mirror pointing parameters sent by the information processor.

5. The infrared target search, identification and tracking test system according to claim 1, It is characterized in that The image framing function module comprises: After adding auxiliary information of time mark, spectrum and satellite attitude orbit to the pure image, it is output; The timing of the intercepted data is consistent with the timing of the camera, and the timing includes the attitude orbit parameters sent by the attitude and orbit control computer at each moment and the swing mirror pointing information sent by the information processor.

6. The infrared target search, identification and tracking test system according to claim 1, It is characterized in that The display and processing function module includes: having real-time data monitoring and data storage and playback functions.

7. The infrared target search, identification and tracking test system according to claim 1, It is characterized in that The system has two working modes: remote control and local control. The equipment works normally in the remote control mode, and the local control mode serves as a working backup.

8. A method for applying the infrared target search, identification and tracking test system according to claim 1, It is characterized in that include: Data receiving function steps: receiving different data information and parameters through the preset interface; Functional steps for establishing the target motion model: output the position of the moving target at any time based on the received information and parameters; Target image simulation function steps: establish a projection model, project the moving target position onto the image plane, and generate the target image based on the projection result; Image framing function steps: intercept and process data according to the camera image auxiliary data format protocol, frame the pure image of the target image, and output image data that conforms to the satellite protocol and contains auxiliary data; Data output function steps: send the framed image data to the information processor through the LVDS interface, and send the target position and time to the attitude and orbit control ground measurement equipment through the Ethernet port; Display and processing function steps: display satellite, satellite pointing, target and simulated projection model images.

9. The method for infrared target search, identification and tracking test according to claim 8, It is characterized in that The information and parameters received by the data receiving function processing step include: Attitude and orbit information sent by attitude and orbit control computers; high-frequency attitude and orbit information sent by attitude and orbit control ground measurement equipment; pointing parameters of the swing mirror sent by the information processor or two-dimensional mechanism; The information and parameters apply to the same interface corresponding to two different protocols; The target motion model establishment function processing steps include: The moving target motion model can be adjusted by setting the parameters of the target's starting position, flight state, flight altitude, flight speed, acceleration, and heading; Among them, the size of the target can be adjusted according to actual needs; The target image simulation function processing step comprises: The target is filled with a specified gray value, and the background is filled with a specified constant value; When the moving target exceeds the field of view, the image is completely filled with a specified constant value of the background, and a prompt sign is issued; The number of pixels occupied by the target and the background gray value can be adjusted; The target image is generated at a frequency of 20 Hz based on the high-frequency satellite orbit and attitude parameters sent by the attitude and orbit control ground measurement equipment and the camera swing mirror pointing parameters sent by the information processor.

10. The method for infrared target search, identification and tracking test according to claim 8, It is characterized in that The image framing function processing steps include: After adding auxiliary information of time mark, spectrum and satellite attitude orbit to the pure image, it is output; The timing of intercepting data is consistent with the timing of the camera, and the timing includes the attitude and orbit parameters sent by the attitude and orbit control computer at each moment and the swing mirror pointing information sent by the information processor; The display and processing function processing steps include: real-time monitoring, storage and playback of data.

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