阅读说明：本技术 一种基于太阳光反射的反侦察干扰方法 (Anti-reconnaissance interference method based on sunlight reflection ) 是由 张小虎 王杰 郭贵松 张新 杨夏 于 2020-06-12 设计创作，主要内容包括：本发明公开一种基于太阳光反射的反侦察干扰方法,利用相机组件探测空间中的非合作目标,获取非合作目标的第一实时图像；根据非合作目标的世界坐标调整各反射单元的姿态,使太阳光覆盖非合作目标；获取非合作目标在太阳光覆盖下的第二实时图像,识别第二实时图像中的非合作目标,判断其是否为侦查状态,若是则进入干扰模式；基于非合作目标上光学侦查设备的世界坐标调整太阳光反射组件的姿态,使多个反射单元所反射的太阳光覆盖非合作目标上的光学侦查设备,使其处于过曝光状态,对其侦查实现有效干扰。通过反射组件改变光路朝向非合作目标的光学侦查设备,使其处于过曝光状态,即可对侦查实现有效干扰,提高空间防护能力。(The invention discloses an anti-reconnaissance interference method based on sunlight reflection, which comprises the steps of detecting a non-cooperative target in a space by utilizing a camera assembly, and acquiring a first real-time image of the non-cooperative target; adjusting the posture of each reflecting unit according to the world coordinates of the non-cooperative target, so that sunlight covers the non-cooperative target; acquiring a second real-time image of the non-cooperative target under the sunlight coverage, identifying the non-cooperative target in the second real-time image, judging whether the non-cooperative target is in a detection state, and entering an interference mode if the non-cooperative target is in the detection state; the posture of the sunlight reflecting component is adjusted based on the world coordinates of the optical detection equipment on the non-cooperative target, so that the sunlight reflected by the plurality of reflecting units covers the optical detection equipment on the non-cooperative target, the optical detection equipment is in an overexposure state, and effective interference is realized on detection. The optical detection equipment with the light path towards the non-cooperative target is changed through the reflection component, so that the optical detection equipment is in an overexposure state, effective interference on detection can be realized, and the space protection capability is improved.)

1. An anti-reconnaissance interference method based on sunlight reflection is characterized by comprising an illumination mode and an interference mode;

the illumination mode specifically comprises the following steps:

101, mounting a camera assembly and a sunlight reflection assembly on a satellite platform, wherein the sunlight reflection assembly comprises a plurality of reflection units with multiple degrees of freedom and adjustable postures, and each reflection unit can reflect sunlight to any direction;

step 102, detecting a non-cooperative target in a space by using a camera assembly, and acquiring a first real-time image of the non-cooperative target;

103, acquiring world coordinates of the non-cooperative target based on the first real-time image of the non-cooperative target, and adjusting the posture of each reflecting unit according to the world coordinates of the non-cooperative target, so that sunlight covers the non-cooperative target to achieve an illumination effect;

104, acquiring a second real-time image of the non-cooperative target under the sunlight coverage, identifying the non-cooperative target in the second real-time image, judging whether the non-cooperative target is in a detection state, and entering an interference mode if the non-cooperative target is in the detection state;

the interference pattern specifically includes the steps of:

step 201, acquiring world coordinates of optical investigation equipment on the non-cooperative target based on a second real-time image of the non-cooperative target;

step 202, the posture of the sunlight reflecting component is adjusted according to the world coordinates of the optical detection equipment on the non-cooperative target, so that the sunlight reflected by the plurality of reflecting units covers the optical detection equipment on the non-cooperative target, the optical detection equipment is in an overexposure state, and effective interference is realized on detection.

2. The anti-reconnaissance interference method based on sunlight reflection according to claim 1, wherein in step 102, the detecting non-cooperative target in the space by the camera assembly comprises:

continuously acquiring a detection image in a space by using a camera assembly, and detecting a non-cooperative target in the space by using a moving target detection algorithm based on the detection image, wherein the moving target detection algorithm comprises but is not limited to a frame difference method and an optical flow method.

3. The anti-reconnaissance interference method based on sunlight reflection according to claim 1, wherein in step 103, the first real-time image based on the non-cooperative target obtains world coordinates of the non-cooperative target, specifically:

step 301, obtaining the pixel coordinate (u) of any point P on the non-cooperative target in the first real-time image_P，v_P)；

Step 302, pixel coordinates (u) based on point P_P，v_P) The world coordinates of point P are obtained with the calibration parameters of the camera assembly:

in the formula (X)_P，Y_P，Z_P) World coordinate of point P, d_x、d_yRepresenting the physical dimensions of a single picture element of the camera in the x and y directions, f representing the focal length, z being a scaling factor, c_x、c_yRepresenting the position of the center point of the first live image in the pixel coordinate system, t_x、t_y、t_zRepresenting a translation vector, r_i(i＝1～9)Representing a rotation matrix;

step 303, traversing all points on the non-cooperative target in the first real-time image and repeating the steps 301-302 to obtain the world coordinates of the non-cooperative target.

4. The anti-reconnaissance interference method based on sunlight reflection according to claim 1, wherein in step 103, the posture of each reflection unit is adjusted according to the world coordinates of the non-cooperative target, so that sunlight covers the non-cooperative target, specifically:

and for any point B on the non-cooperative target, which faces the satellite platform, the attitude of at least one reflecting unit is adjusted according to the world coordinates of the point B, so that at least one beam of sunlight covers the point B after being reflected by the reflecting unit.

5. The anti-reconnaissance interference method based on sunlight reflection according to claim 4, wherein the posture of at least one reflection unit is adjusted according to the world coordinates of the point B, so that sunlight covers the point B after being reflected by the reflection unit, specifically:

let the world coordinate of the reflection point O on the reflection surface on the reflection unit be (0, 0, 0), and the world coordinate of the point B be (X)_B，Y_B，Z_B)；

Taking any point A in the incident direction of the sunlight, the world coordinate of the point A is (X)_A，Y_A，Z_A) Taking any point C on the normal of the reflecting surface on the reflecting unit;

according to the reflection law of light, the following conditions are known:

according to the above formula, the posture of at least one reflection unit is adjusted to make the included angle between the normal of the reflection surface and the incident direction of the sunlight be

6. The anti-reconnaissance interference method based on solar reflection according to any one of claims 1 to 5, wherein in step 201, the second real-time image based on the non-cooperative target obtains world coordinates of an optical reconnaissance device on the non-cooperative target, specifically:

step 401, performing image recognition on the second real-time image to obtain pixel coordinates of all points of the optical investigation equipment on the non-cooperative target in the second real-time image;

step 402, for any point Q of the optical investigation equipment on the non-cooperative target, based on the pixel coordinate (u) of the point Q_Q，v_Q) The world coordinates of point Q are derived from the calibration parameters of the camera assembly:

in the formula (X)_Q，Y_Q，Z_Q) World coordinate of point Q, d_x、d_yRepresenting the physical dimensions of a single picture element of the camera in the x and y directions, f representing the focal length, z being a scaling factor, c_x、c_yRepresenting the position of the center point of the first live image in the pixel coordinate system, t_x、t_y、t_zDenotes translational joining, r_i(i＝1～9)Representing a rotation matrix;

and step 403, traversing all points of the optical investigation equipment on the non-cooperative target in the second real-time image and repeating the step 402, so as to obtain the world coordinates of the optical investigation equipment on the non-cooperative target.

7. The anti-reconnaissance interference method based on sunlight reflection according to claim 6, wherein in step 202, the posture of the sunlight reflection assembly is adjusted according to the world coordinates of the optical reconnaissance device on the non-cooperative target, so that the sunlight reflected by the plurality of reflection units covers the optical reconnaissance device on the non-cooperative target, specifically:

and for any point E on the optical investigation equipment of the non-cooperative target, which faces the satellite platform, the postures of the at least two reflecting units are adjusted according to the world coordinates of the point E, so that the point E is covered after the at least two beams of sunlight are reflected by the reflecting units.

8. The anti-reconnaissance interference method based on sunlight reflection as claimed in claim 4, wherein the attitude of at least two reflection units is adjusted according to the world coordinates of the point E, so that at least two beams of sunlight cover the point E after being reflected by the reflection units, specifically:

let the world coordinate of the reflection point O on the reflection surface on the reflection unit be (0, 0, 0), and the world coordinate of the point E be (X)_E，Y_E，Z_E)；

Taking any point A in the incident direction of the sunlight, the world coordinate of the point A is (X)_A，Y_A，Z_A) Taking any point C on the normal of the reflecting surface on the reflecting unit;

according to the reflection law of light, the following conditions are known:

according to the above formula, the postures of at least two reflecting units are adjusted to make the included angle between the normal of the reflecting surface and the incident direction of sunlight be

Technical Field

The invention relates to the technical field of space anti-reconnaissance interference, in particular to an anti-reconnaissance interference method based on sunlight reflection.

Background

Space has ever-abundant resources and special environment, so countries in the world need to conquer with huge resources or compete for high-point control in the space field. With the advent of the information-based war age, space is gradually becoming a new war field. At present, 3 main indexes are available for measuring the space combat capability of a country: spatial monitoring and early warning capability, spatial deployment capability and spatial defense and attack capability. In "2020 space vision planning" in the united states, monitoring space as one of 5 goals to be achieved by controlling space in 2020 has the main tasks: accurately detecting and tracking an important space target; detecting important target characteristics such as tasks, sizes, shapes, orbit parameters and the like of the spacecraft which possibly threatens the American space system in real time; target characteristic data is classified and distributed.

The detection perception of spatial objects relies primarily on spatial object surveillance systems. The space target monitoring system is a national strategic information acquisition system which utilizes ground-based or space-based detection equipment to detect and track the processes of entering, running in and leaving the space of a spacecraft, observe the running conditions of orbital fragments and natural celestial bodies, comprehensively process, analyze target information and catalog to master the space situation and provide space target information support for civil and military space activities. As an ultimate component of the spatial situation awareness system, the spatial target monitoring system is endowed with more military application tasks in the future development.

Since the new century, the international competition of space is becoming stronger, and the taking of the right to arrest space has been related to the core interests of the country. With the continuous development of aerospace technologies in various countries in the world, space situation detection and safety protection become important contents of aerospace missions. Space-based space target monitoring systems have been successful in the key direction of efforts in various aerospace major countries due to their unique advantages.

However, in recent years, satellites in China are continuously subjected to near observation of unknown satellites and cannot respond in time, so that the initiative is lost, and the protection on satellite information is lost. Because space target reconnaissance is passive imaging and is greatly influenced by ambient light, when the target is in a solar radiation shadow area, the brightness of the target is low, and the detection task is difficult. In addition, in the face of the approach of an enemy to the satellite of the our party, the satellite of the our party lacks an effective anti-reconnaissance interference means.

Disclosure of Invention

In view of one or more deficiencies in the prior art, the invention provides an anti-interference method for reconnaissance based on sunlight reflection, which changes an optical path towards optical reconnaissance equipment of a non-cooperative target through a reflection component so as to enable the optical reconnaissance equipment to be in an overexposure state, thus realizing effective interference on reconnaissance and improving space protection capability.

In order to achieve the above object, the present invention provides an anti-interference method based on sunlight reflection, which includes an illumination mode and an interference mode;

the illumination mode specifically comprises the following steps:

101, mounting a camera assembly and a sunlight reflection assembly on a satellite platform, wherein the sunlight reflection assembly comprises a plurality of reflection units with multiple degrees of freedom and adjustable postures, and each reflection unit can reflect sunlight to any direction;

step 102, detecting a non-cooperative target in a space by using a camera assembly, and acquiring a first real-time image of the non-cooperative target;

103, acquiring world coordinates of the non-cooperative target based on the first real-time image of the non-cooperative target, and adjusting the posture of each reflecting unit according to the world coordinates of the non-cooperative target, so that sunlight covers the non-cooperative target to achieve an illumination effect;

104, acquiring a second real-time image of the non-cooperative target under the sunlight coverage, identifying the non-cooperative target in the second real-time image, judging whether the non-cooperative target is in a detection state, and entering an interference mode if the non-cooperative target is in the detection state;

the interference pattern specifically includes the steps of:

step 201, acquiring world coordinates of optical investigation equipment on the non-cooperative target based on a second real-time image of the non-cooperative target;

step 202, the posture of the sunlight reflecting component is adjusted according to the world coordinates of the optical detection equipment on the non-cooperative target, so that the sunlight reflected by the plurality of reflecting units covers the optical detection equipment on the non-cooperative target, the optical detection equipment is in an overexposure state, and effective interference is realized on detection.

In a further improvement, in step 102, the detecting the non-cooperative target in the space by using the camera assembly specifically includes:

continuously acquiring a detection image in a space by using a camera assembly, and detecting a non-cooperative target in the space by using a moving target detection algorithm based on the detection image, wherein the moving target detection algorithm comprises but is not limited to a frame difference method and an optical flow method.

In a further improvement, in step 103, the obtaining world coordinates of the non-cooperative target based on the first real-time image of the non-cooperative target specifically includes:

step 301, obtaining the pixel coordinate (u) of any point P on the non-cooperative target in the first real-time image_P，v_P)；

Step 302, pixel coordinates (u) based on point P_P，v_P) The world coordinates of point P are obtained with the calibration parameters of the camera assembly:

in the formula (X)_P，Y_P，Z_P) World coordinate of point P, d_x、d_yRepresenting the physical dimensions of a single picture element of the camera in the x and y directions, f representing the focal length, z being a scaling factor, c_x、c_yRepresenting the position of the center point of the first live image in the pixel coordinate system, t_x、t_y、t_zRepresenting a translation vector, r_i(i＝1～9)Representing a rotation matrix;

step 303, traversing all points on the non-cooperative target in the first real-time image and repeating the steps 301-302 to obtain the world coordinates of the non-cooperative target.

In a further improvement, in step 103, the posture of each reflection unit is adjusted according to the world coordinates of the non-cooperative target, so that the sunlight covers the non-cooperative target, specifically:

and for any point B on the non-cooperative target, which faces the satellite platform, the attitude of at least one reflecting unit is adjusted according to the world coordinates of the point B, so that at least one beam of sunlight covers the point B after being reflected by the reflecting unit.

Further improved, the posture of at least one reflection unit is adjusted according to the world coordinate of the point B, so that sunlight covers the point B after being reflected by the reflection unit, specifically:

let the world coordinate of the reflection point O on the reflection surface on the reflection unit be (0, 0, 0), and the world coordinate of the point B be (X)_B，Y_B，Z_B)；

Taking any point A in the incident direction of the sunlight, the world coordinate of the point A is (X)_A，Y_A，Z_A) Taking any point C on the normal of the reflecting surface on the reflecting unit;

according to the reflection law of light, the following conditions are known:

according to the above formula, the posture of at least one reflection unit is adjusted to make the included angle between the normal of the reflection surface and the incident direction of the sunlight beI.e. the sunlight covers point B.

In step 201, the step of obtaining the world coordinates of the optical detection device on the non-cooperative target based on the second real-time image of the non-cooperative target specifically includes:

step 401, performing image recognition on the second real-time image to obtain pixel coordinates of all points of the optical investigation equipment on the non-cooperative target in the second real-time image;

step 402, for any point Q of the optical investigation equipment on the non-cooperative target, based on the pixel coordinate (u) of the point Q_Q，v_Q) The world coordinates of point Q are derived from the calibration parameters of the camera assembly:

in the formula (X)_Q，Y_Q，Z_Q) World coordinate of point Q, d_x、d_yRepresenting the physical dimensions of a single picture element of the camera in the x and y directions, f representing the focal length, z being a scaling factor, c_x、c_yRepresenting the position of the center point of the first live image in the pixel coordinate system, t_x、t_y、t_zDenotes translational joining, r_i(i＝1～9)Representing a rotation matrix;

and step 403, traversing all points of the optical investigation equipment on the non-cooperative target in the second real-time image and repeating the step 402, so as to obtain the world coordinates of the optical investigation equipment on the non-cooperative target.

In step 202, the posture of the sunlight reflecting assembly is adjusted according to the world coordinates of the optical detection device on the non-cooperative target, so that the sunlight reflected by the plurality of reflecting units covers the optical detection device on the non-cooperative target, specifically:

and for any point E on the optical investigation equipment of the non-cooperative target, which faces the satellite platform, the postures of the at least two reflecting units are adjusted according to the world coordinates of the point E, so that the point E is covered after the at least two beams of sunlight are reflected by the reflecting units.

In a further improvement, the postures of the at least two reflection units are adjusted according to the world coordinates of the point E, so that the at least two beams of sunlight cover the point E after being reflected by the reflection units, specifically:

let the world coordinate of the reflection point O on the reflection surface on the reflection unit be (0, 0, 0), and the world coordinate of the point E be (X)_E，Y_E，Z_E)；

Taking any point A in the incident direction of the sunlight, the world coordinate of the point A is (X)_A，Y_A，Z_A) Taking any point C on the normal of the reflecting surface on the reflecting unit;

according to the reflection law of light, the following conditions are known:

according to the above formula, the postures of at least two reflecting units are adjusted to make the included angle between the normal of the reflecting surface and the incident direction of sunlight beI.e. at least two beams of sunlight can cover the point E.

According to the anti-reconnaissance interference method based on sunlight reflection, after a non-cooperative target is detected, sunlight reflected by the reflecting component is enabled to irradiate on the non-cooperative target by adjusting the posture of the reflecting component, the definition of a detected image is further effectively improved, the non-cooperative target is convenient to identify, and when the non-cooperative target is identified to be in a reconnaissance state, the posture of the reflecting component is adjusted again, so that multiple beams of sunlight are focused on the optical reconnaissance equipment on the non-cooperative target, the optical reconnaissance equipment is further enabled to be in an overexposure state, and effective interference is achieved for reconnaissance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of an interference system based on anti-interference detection by reflection of sunlight according to an embodiment of the present invention;

FIG. 2 is a schematic illustration of a non-cooperative target in a shadow zone of solar radiation in an embodiment of the present invention;

FIG. 3 is a schematic view of an embodiment of the present invention illustrating the imaging of a camera assembly when a non-cooperative target is in a shadow region of solar radiation;

FIG. 4 is a schematic view of illumination of a non-cooperative target with sunlight reflected by a reflective assembly in an embodiment of the present invention;

FIG. 5 is a schematic flow chart of an interference method for anti-interference detection based on sunlight reflection according to an embodiment of the present invention;

FIG. 6 is a schematic diagram illustrating calculation of attitude adjustment parameters of a reflection unit according to an embodiment of the present invention;

FIG. 7 is a diagram illustrating the effect of overexposure imaging in an embodiment of the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; the connection can be mechanical connection, electrical connection, physical connection or wireless communication connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The sunlight intensity in the space environment is extremely high, and if the light path can be changed to the optical investigation equipment of the non-cooperative target through the reflecting device, the optical investigation equipment is in an overexposure state, so that the effective interference on the investigation can be realized, and the space protection capability is improved. The present embodiment adopts a set of interference system based on sunlight reflection for anti-reconnaissance interference shown in fig. 1, which includes a satellite platform, and a camera assembly and a sunlight reflection assembly mounted on the satellite platform, wherein the sunlight reflection assembly is composed of a flexible supporting structure and a reflection unit provided on the flexible supporting structure, each reflection unit has a function of multi-degree-of-freedom motion under the driving of the flexible supporting structure, and further can reflect sunlight to any direction by the reflection unit, and how to set a supporting structure to support a planar structure and change the structural setting and control setting of the orientation of the planar structure through the supporting structure are conventional technical means, and therefore, the details are not repeated in this embodiment. The reflecting unit is made of a material having high reflection efficiency, such as copper or a copper alloy.

The camera component adopts a conventional detection camera, and before the detection camera is put into use, the detection camera needs to be calibrated, so that internal parameters, external parameters and the like of the camera are obtained, and the internal parameters, the external parameters and the like specifically comprise a focal length f, a pixel size, a translation matrix T and a rotation matrix R. In this embodiment, the calibration method of the detection camera adopts a conventional calibration method in the art: zhangzhengyou calibration method. Finally obtaining a translation matrix between the detection camera and the world coordinate system asA rotation matrix of

The anti-reconnaissance interference method based on sunlight reflection in the embodiment specifically includes an illumination mode and an interference mode.

When the satellite platform of our party is in a space target reconnaissance mission, as shown in fig. 2, when the non-cooperative target is in a solar radiation shadow area, i.e. sunlight is shielded by the earth or other space objects, the imaging brightness of the camera assembly is dim and unclear due to the fact that the non-cooperative target is dark, as shown in fig. 3. In response to this problem, the present embodiment utilizes the sunlight reflected by the reflection component to illuminate the non-cooperative target, thereby implementing remote sensing detection and proximity detection imaging under the backlight condition. As shown in fig. 4, the satellite platform operates the flexible support structure, so that the reflection unit reflects sunlight and irradiates the non-cooperative target, thereby increasing the satellite brightness of the non-cooperative target and improving the imaging of the camera assembly on the non-cooperative target.

In the illumination mode, the satellite platform needs to control the flexible support structure to enable the reflection unit to reflect and irradiate sunlight on a non-cooperative target, wherein the control strategy uses an adaptive control algorithm to adjust the angle of the flexible support structure.

Referring to fig. 5, the lighting mode in this embodiment specifically includes the following steps:

step 101, installing a camera assembly and a sunlight reflecting assembly on a satellite platform.

Step 102, detecting a non-cooperative target in a space by using a camera assembly, and acquiring a first real-time image of the non-cooperative target, wherein the detecting the non-cooperative target in the space by using the camera assembly specifically includes:

the method includes the steps of continuously acquiring a detection image in a space by using a camera assembly, and detecting a non-cooperative target in a space by using a moving target detection algorithm based on the detection image, wherein the moving target detection algorithm includes but is not limited to a frame difference method and an optical flow method, and the detection of the non-cooperative target in the space by using the moving target detection algorithm belongs to a conventional technical means, so that details are not repeated in the embodiment.

103, acquiring world coordinates of the non-cooperative target based on the first real-time image of the non-cooperative target, and adjusting the posture of each reflecting unit according to the world coordinates of the non-cooperative target, so that sunlight covers the non-cooperative target to achieve an illumination effect, wherein:

the method for acquiring the world coordinates of the non-cooperative target based on the first real-time image of the non-cooperative target specifically comprises the following steps:

step 301, obtaining the pixel coordinate (u) of any point P on the non-cooperative target in the first real-time image_P，v_P)；

Step 302, pixel coordinates (u) based on point P_P，v_P) The world coordinates of point P are obtained with the calibration parameters of the camera assembly:

in the formula (X)_P，Y_P，Z_P) World coordinate of point P, d_x、d_yRepresenting the physical dimensions of a single picture element of the camera in the x and y directions, f representing the focal length, z being a scaling factor, c_x、c_yRepresenting the position of the center point of the first live image in the pixel coordinate system, t_x、t_y、t_zDenotes translational joining, r_i(i＝1～9)Representing a rotation matrix;

step 303, traversing all points on the non-cooperative target in the first real-time image and repeating the steps 301-302 to obtain the world coordinates of the non-cooperative target.

The method for adjusting the posture of each reflecting unit according to the world coordinates of the non-cooperative target enables sunlight to cover the non-cooperative target, and specifically comprises the following steps:

referring to fig. 6, for any point B on the non-cooperative target that faces the satellite platform, the attitude of the at least one reflection unit is adjusted according to the world coordinates of the point B, so that the point B is covered by at least one beam of sunlight after being reflected by the reflection unit, and the specific implementation process is as follows:

let the world coordinate of the reflection point O on the reflection surface on the reflection unit be (0, 0, 0), and the world coordinate of the point B be (X)_B，Y_B，Z_B)；

Taking any point A in the incident direction of the sunlight, the world coordinate of the point A is (X)_A，Y_A，Z_A) Taking any point C on the normal of the reflecting surface on the reflecting unit;

according to the reflection law of light, the following conditions are known:

according to the above formula, the posture of at least one reflection unit is adjusted to make the included angle between the normal of the reflection surface and the incident direction of the sunlight beI.e. the sunlight covers point B.

And 104, acquiring a second real-time image of the non-cooperative target under the sunlight coverage, identifying the non-cooperative target in the second real-time image, judging whether the non-cooperative target is in a detection state, and entering an interference mode if the non-cooperative target is in the detection state. Whether the detection state is determined by the motion trajectory and the posture change of the non-cooperative target is determined, and the determination process is a mature technology in the prior art, so that the present embodiment is not repeated.

After the non-cooperative target is judged to be in a detection state, when the non-cooperative target approaches to the satellite platform of the detection party, the satellite platform in the figure 4 controls the flexible supporting structure, so that the reflecting unit reflects sunlight and focuses the sunlight on the optical detection equipment of the non-cooperative target, the optical detection equipment is subjected to physical overexposure, the blind caused by the directional interference of the optical detection equipment of the enemy is realized, the information of the satellite platform of the detection party cannot be detected by the camera of the enemy, the effective interference is realized on the detection of the satellite platform of the detection party, the space protection capability is improved, and the overexposure imaging effect of the non-cooperative target is shown in the figure 7 due to the sunlight.

In the interference blinding mode, the satellite platform needs to control the flexible supporting structure on the basis of detecting the optical investigation equipment of the non-cooperative target, so that the reflection unit reflects and focuses sunlight on the optical investigation equipment of the non-cooperative target, which needs more accurate control of the satellite platform, and therefore the control strategy selects a control strategy based on an extended Kalman filtering algorithm.

Referring to fig. 5, the interference mode in this embodiment specifically includes the following steps:

step 201, performing image recognition on the second real-time image of the non-cooperative target to obtain a world coordinate of the optical detection device on the non-cooperative target, which specifically includes:

step 401, performing image recognition on the second real-time image, and acquiring pixel coordinates of all points of the optical detection device on the non-cooperative target in the second real-time image, wherein recognizing the image and recognizing the pixel coordinates of the optical detection device in the image are conventional technical means in the field, and therefore details are not repeated in this embodiment;

step 402, for any point Q of the optical investigation equipment on the non-cooperative target, based on the pixel coordinate (u) of the point Q_Q，v_Q) The world coordinates of point Q are derived from the calibration parameters of the camera assembly:

in the formula (X)_Q，Y_Q，Z_Q) World coordinate of point Q, d_x、d_yRepresenting the physical dimensions of a single picture element of the camera in the x and y directions, f representing the focal length, z being a scaling factor, c_x、c_yRepresenting the position of the center point of the first live image in the pixel coordinate system, t_x、t_y、t_zDenotes translational joining, r_i(i＝1～9)Representing a rotation matrix;

and step 403, traversing all points of the optical investigation equipment on the non-cooperative target in the second real-time image and repeating the step 402, so as to obtain the world coordinates of the optical investigation equipment on the non-cooperative target.

Step 202, adjusting the posture of the sunlight reflecting component according to the world coordinates of the optical detection equipment on the non-cooperative target, so that the sunlight reflected by the plurality of reflecting units covers the optical detection equipment on the non-cooperative target, and the optical detection equipment is in an overexposure state, and the detection of the optical detection equipment is effectively interfered, wherein:

the posture of the sunlight reflecting assembly is adjusted according to the world coordinates of the optical investigation equipment on the non-cooperative target, so that the sunlight reflected by the plurality of reflecting units covers the optical investigation equipment on the non-cooperative target, and the posture adjusting method specifically comprises the following steps:

for any point E on the optical investigation equipment of the non-cooperative target, which faces the satellite platform, the postures of the at least two reflecting units are adjusted according to the world coordinates of the point E, so that the at least two beams of sunlight cover the point E after being reflected by the reflecting units, and the method specifically comprises the following steps:

let the world coordinate of the reflection point O on the reflection surface on the reflection unit be (0, 0, 0), and the world coordinate of the point E be (X)_E，Y_E，Z_E)；

Taking any point A in the incident direction of the sunlight, the world coordinate of the point A is (X)_A，Y_A，Z_A) Taking any point C on the normal of the reflecting surface on the reflecting unit;

according to the reflection law of light, the following conditions are known:

according to the above formula, the postures of at least two reflecting units are adjusted to make the included angle between the normal of the reflecting surface and the incident direction of sunlight be

I.e. at least two beams of sunlight can cover the point E.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.