A two-dimensional optical search assembly jammer evading method

Abstract

A two-dimensional optical search assembly interference light source avoidance method, the method is applied to a two-dimensional optical search assembly interference light source avoidance system, the system comprises: a two-dimensional optical search assembly, an avoidance control system, an interference light source detection device; wherein the avoidance control system is connected with the two-dimensional optical search assembly and the interference light source detection device respectively. The present application calculates the incident vector azimuth angle of the interference light source and the incident vector pitch angle of the interference light source through the received interference light source information, and realizes the avoidance of the interference light source by rotating the two-dimensional optical search assembly, thereby protecting the optical detector.

Description

Technical Field

[0001] This invention relates to the field of optical anti-interference, and in particular to a method for avoiding interference light sources in a two-dimensional optical search component. Background Technology

[0002] Space situational awareness is fundamental to human space activities. Compared to ground-based observation equipment, space-based platforms are not limited by weather, environment, or geographical conditions, and can observe space targets for extended periods. Therefore, space-based situational awareness has received widespread attention. Among various observation methods, space-based visible light observation has become a primary means due to its advantages such as low energy consumption, high reliability, and long observation distance.

[0003] In recent years, with the rapid development of technologies such as lasers, the use of lasers to interfere with space optical cameras has attracted widespread attention. As a "visual system," the imaging system of an optical camera has a large optical gain, making it highly susceptible to effective interference from laser irradiation. Once a laser irradiates an optical camera, it saturates the detector pixels. When the interference light energy is strong enough, it can cause pixel saturation in a certain area, thus forming an interference spot on the image plane.

[0004] From the perspective of laser incident angle, interference can be divided into in-field-of-view interference and out-of-field-of-view interference. In-field-of-view interference refers to the interference caused to the camera when the laser beam is incident within the field of view of the photoelectric detection system, and its spot or imaging point falls directly on the detector surface. Out-of-field-of-view interference refers to the interference caused to the camera when the laser beam is incident outside the field of view of the photoelectric detection system, and the geometric image point of the laser beam falls outside the detector surface. Out-of-field-of-view interference is caused by diffraction and scattering of the laser beam as it passes through the optical system. In practical applications, it is difficult to aim the laser beam at a space camera within its field of view; in most cases, out-of-field-of-view interference is the dominant type.

[0005] Therefore, how to avoid the impact of incident light sources such as lasers that may exist in space on space camera detectors or optical systems is the technical problem that this invention needs to solve. Summary of the Invention

[0006] The purpose of this invention is to provide a method for avoiding interference sources in a two-dimensional optical search component. This method is applied to a two-dimensional optical search component interference source avoidance system, which includes: a two-dimensional optical search component, an avoidance control system, and an interference source detection device. The avoidance control system is connected to both the two-dimensional optical search component and the interference source detection device. The method includes: Step S1, the two-dimensional optical search component transmits its current position information to the avoidance control system; Step S2, the interference source detection device captures the interference source and transmits its information to the avoidance control system; Step S3, the avoidance control system calculates control information for autonomous avoidance or avoidance at a specified location based on the current position information of the two-dimensional optical search component and the interference source information; Step S4, the two-dimensional optical search component receives the control information from the avoidance control system and performs avoidance movement according to the control information; wherein the interference source information includes the incident vector of the interference source.

[0007] Preferably, step S1 includes: the position information of the two-dimensional optical search component includes the azimuth angle of the optical axis of the two-dimensional optical search component and the pitch angle of the optical axis of the two-dimensional optical search component.

[0008] Preferably, step S2 further includes: step S21, converting the incident vector of the interfering light source into the incident vector of the interfering light source in the measurement coordinate system; step S22, calculating the azimuth angle and elevation angle of the incident vector of the interfering light source based on the incident vector of the interfering light source in the measurement coordinate system.

[0009] Preferably, step S22 includes: measuring the incident vector of the interference light source in the coordinate system, which is represented by [xyz];

[0010] Azimuth of the incident vector of the interference light source The pitch angle pit of the incident vector of the interfering light source is pit=arccos(z), and the value of z ranges from -1 to 1.

[0011] Preferably, the control information includes: the optical axis azimuth angle of the two-dimensional optical search component is rotated to a position that differs from the azimuth angle of the incident vector of the interfering light source by a first threshold; and the optical axis elevation angle of the two-dimensional optical search component is rotated to a position that differs from the elevation angle of the incident vector of the interfering light source by a second threshold.

[0012] Preferably, the rotation range of the optical axis azimuth angle of the two-dimensional optical search component is -180° to +180°, the rotation range of the optical axis pitch angle of the two-dimensional optical search component is -90° to +90°, the range of the first threshold is -180° to +180°, and the range of the second threshold is -180° to +180°.

[0013] Preferably, under autonomous avoidance, step S3 includes: the control information is that the optical axis azimuth angle of the two-dimensional optical search component is rotated to a position 180° different from the azimuth angle of the incident vector of the interfering light source; the optical axis elevation angle of the two-dimensional optical search component is rotated to a position 180° different from the elevation angle of the incident vector of the interfering light source; if the rotation range of the optical axis elevation angle of the two-dimensional optical search component is limited and it cannot be rotated to a position 180° different, then it is rotated to the position with the largest difference between the two.

[0014] Preferably, under the specified location avoidance, step S3 includes: the control information is that the optical axis azimuth angle of the two-dimensional optical search component is rotated to a position that differs from the manually calculated azimuth angle of the incident vector of the interfering light source by a first threshold, and the optical axis elevation angle of the two-dimensional optical search component is rotated to a position that differs from the manually calculated elevation angle of the incident vector of the interfering light source by a second threshold.

[0015] Preferably, the two-dimensional optical search component includes a two-dimensional motion mechanism and an image capture mechanism; the image capture mechanism is mounted on the mounting surface of the two-dimensional motion mechanism, and when the two-dimensional motion mechanism rotates, it can drive the image capture mechanism to rotate together to achieve motion avoidance.

[0016] In summary, compared with existing technologies, it has the following beneficial effects:

[0017] First, the anti-interference control system in this invention has a strong anti-interference effect.

[0018] Secondly, users of this invention can choose which avoidance method to adopt based on the actual situation, adapting to various circumstances. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a method for avoiding interference from light sources in a two-dimensional optical search component.

[0020] Figure 2 This is a schematic diagram of a two-dimensional optical search component interference light source avoidance system.

[0021] Figure 3 A schematic diagram illustrating how the optical axis azimuth of the two-dimensional optical search component is rotated to a position different from the azimuth of the incident vector of the interfering light source during autonomous avoidance.

[0022] Figure 4 A schematic diagram showing the optical axis pitch angle of the two-dimensional optical search component rotating to a position 180° different from the pitch angle of the incident vector of the interfering light source during autonomous avoidance.

[0023] Figure 5 A schematic diagram showing that, during autonomous avoidance, the optical axis pitch angle of the two-dimensional optical search component cannot be rotated to a position 180° different from the pitch angle of the incident vector of the interfering light source. Detailed Implementation

[0024] The following will be combined with the appendix in the embodiments of the present invention. Figure 1 ~Attached Figure 5 The technical solutions, structural features, objectives and effects achieved in the embodiments of the present invention will be described in detail.

[0025] It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions. They are only used to facilitate and clarify the purpose of illustrating the embodiments of the present invention, and are not intended to limit the implementation conditions of the present invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationship, or adjustments to the size should still fall within the scope of the technical content disclosed in the present invention, provided that they do not affect the effects and objectives that the present invention can produce.

[0026] It should be noted that, in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only the expressly listed elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0027] This invention provides a method for avoiding interference sources in a two-dimensional optical search component. The method is applied to a two-dimensional optical search component interference source avoidance system, such as... Figure 2 As shown, the system includes: a two-dimensional optical search component, an avoidance control system, and an interference light source detection device; wherein the avoidance control system is connected to the two-dimensional optical search component and the interference light source detection device respectively.

[0028] The two-dimensional optical search component transmits its current position information to the avoidance control system.

[0029] The location information includes the azimuth angle of the optical axis of the two-dimensional optical search component and the pitch angle of the optical axis of the two-dimensional optical search component.

[0030] The interference light source detection device is used to capture interference light sources and transmit interference light source information to the avoidance control system. The interference light source information includes the incident vector of the interference light source; wherein, the incident vector of the interference light source can be converted into the azimuth angle and the elevation angle of the incident vector of the interference light source in subsequent processes.

[0031] The avoidance control system calculates control information based on the current position information of the two-dimensional optical search component and the information of the interfering light source. The control information includes: the optical axis azimuth angle of the two-dimensional optical search component rotating to a position differing from the azimuth angle of the incident vector of the interfering light source by a first threshold; and the optical axis elevation angle of the two-dimensional optical search component rotating to a position differing from the elevation angle of the incident vector of the interfering light source by a second threshold. The corresponding control information can be obtained according to either autonomous avoidance or designated position avoidance.

[0032] The optical axis azimuth angle of the two-dimensional optical search component rotates within a range of -180° to +180°, the optical axis pitch angle of the two-dimensional optical search component rotates within a range of -90° to +90°, the first threshold ranges within a range of -180° to +180°, and the second threshold ranges within a range of -180° to +180°.

[0033] The two-dimensional optical search component receives control information and performs evasive maneuvers.

[0034] In a specific embodiment, the two-dimensional optical search component includes a two-dimensional motion mechanism and an image capture mechanism, with the two-dimensional motion mechanism enabling avoidance maneuvers. For example, the image capture mechanism is mounted on the mounting surface of the two-dimensional motion mechanism, and its rotation can cause the image capture mechanism to rotate as well.

[0035] like Figure 1 As shown, a method for avoiding interference from light sources in a two-dimensional optical search component is described below:

[0036] Step S1: The two-dimensional optical search component transmits its current position information to the avoidance control system.

[0037] In step S2, the interference light source detection device captures the interference light source and transmits the interference light source information to the avoidance control system.

[0038] Step S3: The avoidance control system calculates control information for autonomous avoidance or avoidance at a specified location based on the current position information of the two-dimensional optical search component and the interference light source information.

[0039] In step S4, the two-dimensional optical search component receives control information from the evasion control system and performs evasion movement according to the control information.

[0040] This document describes an embodiment for avoiding interfering light sources by utilizing the incident vector of the interfering light source in the interfering light source information. Step S2 further includes:

[0041] Step S21: Convert the incident vector of the interference light source into the incident vector of the interference light source in the measurement coordinate system.

[0042] Step S22: Calculate the azimuth angle and elevation angle of the incident vector of the interference light source based on the incident vector of the interference light source in the measurement coordinate system.

[0043] In step S22, the following is an example of how to calculate the azimuth angle and elevation angle of the incident vector of the interference light source.

[0044] The incident vector of the interfering light source in the measurement coordinate system is represented by [xyz].

[0045] Azimuth of the incident vector of the interference light source

[0046] The pitch angle pit of the incident vector of the interfering light source is pit=arccos(z), and the value of z ranges from -1 to 1.

[0047] In situations where interference light avoidance is required, the avoidance method is manually selected according to the actual situation. The control information in step S3 is different under different avoidance methods (autonomous avoidance or avoidance at a designated location).

[0048] like Figures 3-5 As shown, when the avoidance mode is autonomous avoidance, the control information is that the optical axis azimuth angle of the two-dimensional optical search component rotates to a position 180° different from the azimuth angle of the incident vector of the interfering light source, and the optical axis elevation angle of the two-dimensional optical search component rotates to a position 180° different from the elevation angle of the incident vector of the interfering light source. If the rotation range of the elevation angle is limited and it cannot rotate to a position with a 180° difference, then it rotates to the position with the largest difference between the two. Specifically, Figure 4 This is a schematic diagram showing that the optical axis pitch angle of the two-dimensional optical search component can be rotated to a position 180° different from the pitch angle of the incident light source vector. At this point, a 180° rotation can be achieved directly by simply rotating the component. Figure 5 This is a schematic diagram showing that the optical axis pitch angle of the two-dimensional optical search component cannot be rotated to a position 180° different from the pitch angle of the incident light source vector. At this point, the rotation cannot reach 180° due to the rotation limitation. Rotating to the maximum angle will suffice.

[0049] When the avoidance method is designated location avoidance, the optical axis azimuth angle of the two-dimensional optical search component is rotated to a position that differs from the manually calculated azimuth angle of the incident vector of the interfering light source by a first threshold; and the optical axis elevation angle of the two-dimensional optical search component is rotated to a position that differs from the manually calculated elevation angle of the incident vector of the interfering light source by a second threshold.

[0050] Among them, the range of optical axis azimuth angle rotation, the range of optical axis pitch angle rotation, and the range of manually calculated phase difference threshold under the specified position avoidance should follow the aforementioned range of optical axis azimuth angle rotation of the two-dimensional optical search component, the range of optical axis pitch angle rotation of the two-dimensional optical search component, the range of the first threshold, and the range of the second threshold.

[0051] The calculation method here can be achieved using existing technology, and its principle is similar to that of turntables and other similar devices.

[0052] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A method for avoiding interference light sources in a two-dimensional optical search component, characterized in that, The method is applied to a two-dimensional optical search component interference light source avoidance system, the system comprising: The system includes a two-dimensional optical search component, an avoidance control system, and an interference light source detection device; wherein the avoidance control system is connected to both the two-dimensional optical search component and the interference light source detection device. The method includes: Step S1: The two-dimensional optical search component transmits its current position information to the evasion control system. Step S2: The interference light source detection device captures the interference light source and transmits the interference light source information to the avoidance control system. Step S3: The avoidance control system calculates the control information under autonomous avoidance or avoidance at a specified location based on the current position information of the two-dimensional optical search component and the interference light source information. In step S4, the two-dimensional optical search component receives control information from the evasion control system and performs evasion movement according to the control information. The interference light source information includes the incident vector of the interference light source.

2. The method for avoiding interference light sources in a two-dimensional optical search component according to claim 1, characterized in that, Step S1 includes: the position information of the two-dimensional optical search component includes the optical axis azimuth angle and the optical axis elevation angle of the two-dimensional optical search component.

3. The method for avoiding interference light sources in a two-dimensional optical search component according to claim 2, characterized in that, Step S2 further includes: Step S21: Convert the incident vector of the interfering light source into the incident vector of the interfering light source in the measurement coordinate system; Step S22: Calculate the azimuth angle and elevation angle of the incident vector of the interference light source based on the incident vector of the interference light source in the measurement coordinate system.

4. The method for avoiding interference light sources in a two-dimensional optical search component according to claim 3, characterized in that, Step S22 includes: The incident vector of the interfering light source in the measurement coordinate system is represented by [xyz]. Azimuth of the incident vector of the interference light source The pitch angle pit of the incident vector of the interfering light source is pit=arccos(z), and the value of z ranges from -1 to 1.

5. The method for avoiding interference light sources in a two-dimensional optical search component according to claim 4, characterized in that, The control information includes: the optical axis azimuth angle of the two-dimensional optical search component is rotated to a position that differs from the azimuth angle of the incident vector of the interfering light source by a first threshold; and the optical axis elevation angle of the two-dimensional optical search component is rotated to a position that differs from the elevation angle of the incident vector of the interfering light source by a second threshold.

6. The method for avoiding interference light sources in a two-dimensional optical search component according to claim 5, characterized in that, The rotation range of the optical axis azimuth angle of the two-dimensional optical search component is -180° to +180°, the rotation range of the optical axis pitch angle of the two-dimensional optical search component is -90° to +90°, the range of the first threshold is -180° to +180°, and the range of the second threshold is -180° to +180°.

7. The method for avoiding interference light sources in a two-dimensional optical search component according to claim 6, characterized in that, Under autonomous avoidance, step S3 includes: The control information is that the optical axis azimuth angle of the two-dimensional optical search component is rotated to a position that differs from the azimuth angle of the incident vector of the interference light source by 180°. The optical axis pitch angle of the two-dimensional optical search component is rotated to a position that is 180° different from the pitch angle of the incident vector of the interfering light source; if the rotation range of the optical axis pitch angle of the two-dimensional optical search component is limited and it cannot be rotated to a position that is 180° different, then it is rotated to a position where the difference between the two is the largest.

8. The method for avoiding interference light sources in a two-dimensional optical search component according to claim 6, characterized in that, Under the specified location avoidance method, step S3 includes: The control information is the position where the optical axis azimuth angle of the two-dimensional optical search component is rotated to a position that differs from the manually calculated azimuth angle of the incident vector of the interfering light source by a first threshold, and the position where the optical axis elevation angle of the two-dimensional optical search component is rotated to a position that differs from the manually calculated elevation angle of the incident vector of the interfering light source by a second threshold.

9. A method for avoiding interference light sources in a two-dimensional optical search component according to any one of claims 1 to 8, characterized in that, The two-dimensional optical search component includes: a two-dimensional motion mechanism and an image capture mechanism; The image capture mechanism is mounted on the mounting surface of the two-dimensional motion mechanism. When the two-dimensional motion mechanism rotates, it can drive the image capture mechanism to rotate together, thereby achieving motion avoidance.

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