Cabin optical antenna self-adaptive regulation and control device based on magnetic suspension control

Abstract

The invention discloses an in-cabin optical antenna self-adaptive regulation and control device based on magnetic suspension control, belongs to the technical field of wireless high-speed laser communication, and aims to solve the problem that a system is completely paralyzed and cannot be regulated after a cold backup fails in the prior art. The device comprises an optical switch I, a transmitting collimator I, a transmitting collimator II, a reflecting mirror I, a reflecting mirror II, a receiving collimator II, a receiving collimator I, a magnetic suspension platform, an optical switch II, an optical coupler, an optical amplifier, a photoelectric detector, a controller and a magnetic suspension driver. A magnetic suspension control mechanism is arranged in the device, if the system is completely paralyzed after a space light transmission channel based on a drawing reflector and cannot be adjusted, further adjustment can be achieved through magnetic suspension control, and the function of an optical communication system is achieved and completed. In the regulation and control process, the performance of the communication system is improved through the processes of magnetic suspension angle range scanning, drawing of the spatial light transmission channel of the reflector, magnetic suspension displacement range scanning and drawing of the spatial light transmission channel of the reflector in sequence.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless high-speed laser communication, and in particular relates to an adaptive control device for an in-cabin optical antenna based on magnetic levitation control. Background Art

[0002] In recent years, space cameras with high temporal and spatial resolution for space-based and ground-based targets have become a hot topic in the field of modern optical observation. Due to the high spectral and high spatial resolution of existing space cameras and other payloads, the payload will generate a large number of high-pixel images or high-definition videos per unit time. For this reason, there is an urgent need for real-time transmission of massive data in the payload cabin (hundreds of gigabits per second, or even higher). At present, due to the large number of focal plane splicing in space cameras, there are multi-channel data streams to be output. Due to the dynamic random rotation state between the payload cabin and the satellite cabin, dense wavelength division multiplexing optical communication must use single-mode fiber coupling. Due to the small core diameter and numerical aperture of single-mode optical fiber, the coupling efficiency is low in the dynamic random rotation state, and the anti-deflection offset capability is insufficient, resulting in poor quality of massive data transmission or even interruption.

[0003] The Chinese patent application number is "202210116019.7", and the patent name is "Ultra-high-speed and highly reliable wireless optical communication device between cabins with multiple data under dynamic conditions". The device describes the overall block diagram of the ultra-high-speed wireless optical communication device in the cabin. The antenna conduction status is determined by remote measurement before the optical amplifier. Four transmission and receiving channels can be realized through the spatial optical transmission channel based on the pull-out reflector, which greatly improves the reliability of the spatial optical transmission channel. However, the device cannot guarantee the communication quality after pulling out the reflector. If the communication quality after pulling out the reflector is still not ideal, the data transmission will completely fail. For this reason, the device has the problem of complete paralysis and inability to adjust the system after the cold backup fails. Summary of the invention

[0004] In order to solve the problem in the prior art that the system is completely paralyzed and cannot be adjusted after the cold backup fails, the present invention proposes an adaptive control device for an optical antenna in a cabin based on magnetic levitation control.

[0005] The technical solution of the present invention to solve the technical problem is:

[0006] An adaptive control device for an optical antenna in a cabin based on magnetic levitation control, the device comprising: an optical switch 1, a transmitting collimator 1, a transmitting collimator 2, a reflector 1, a reflector 2, a receiving collimator 2, a receiving collimator 1, a magnetic levitation platform, an optical switch 2, an optical coupler, an optical amplifier, a photodetector, a controller and a magnetic levitation driver;

[0007] The transmitting collimator 1, the transmitting collimator 2, the reflector 1, the reflector 2, the receiving collimator 2 and the receiving collimator 1 constitute an optical antenna;

[0008] The two output ports of the optical switch 1 are respectively connected to the transmitting collimator 1 and the transmitting collimator 2 by optical fibers, the output optical axis of the transmitting collimator 1 and the output optical axis of the transmitting collimator 2 are placed at 90 degrees, and the reflector 1 is placed at 45 degrees to the output optical axis of the transmitting collimator 1, wherein the reflective surface of the reflector 1 faces the output optical axis of the transmitting collimator 2; the reflector 2 is placed at -45 degrees to the output optical axis of the reflector 1, and there is a distance of 20 cm, the reflective surface of the reflector 2 faces the input optical axis of the receiving collimator 2, and the input optical axis of the receiving collimator 1 and the input optical axis of the receiving collimator 2 are placed at 90 degrees; the output optical fibers of the receiving collimator 2 and the receiving collimator 1 are connected to the two input ports of the optical switch 2; the magnetic suspension platform carries the reflector 2, the receiving collimator 2 and the receiving collimator 1; the output end of the optical switch 2, one end of the optical coupler, and the optical amplifier are connected in sequence by optical fibers, and the other end of the optical coupler is connected to the photoelectric detector optical fiber; the photoelectric detector, the controller, the magnetic suspension drive and the magnetic suspension platform are connected in sequence by cables;

[0009] Normal working process: the signal light after high-speed modulation passes through optical switch 1 to transmit collimator 2, and then passes through transmit collimator 2 to obtain collimated spatial signal light beam; the collimated spatial signal light is reflected by reflector 1 and reflector 2 and enters receiving collimator 1 to be converted into optical fiber signal light; the optical fiber signal light is split into two by optical coupler 1, and most of the light enters the optical amplifier to be amplified to the subsequent data detection system;

[0010] Cold backup switching process: Part of the light passes through the photoelectric detector to obtain the optical power value, and the optical power value is used to determine whether the transmitting collimator 2 and the receiving collimator 2 are misaligned. If they are misaligned, the four arrangement channels of transmitting collimator 1, transmitting collimator 2 and receiving collimator 1, receiving collimator 2 are arranged and combined by moving reflector 1 and reflector 2, so as to eliminate the fault;

[0011] Magnetic levitation control working process: If the optical antenna still cannot be aligned after the cold backup switching process, the controller sends instructions to the magnetic levitation driver to drive the magnetic levitation platform to complete the magnetic levitation angle and displacement scanning alignment until the transmitting collimator 2 and the receiving collimator 2 are aligned.

[0012] A control method for an adaptive control device for an in-cabin optical antenna based on magnetic levitation control, characterized in that the method comprises the following steps:

[0013] Step 1: troubleshoot the problem through cold backup;

[0014] According to the optical power value of the photodetector, it is determined whether the transmitting collimator 2 and the receiving collimator 2 are aligned. If the optical power value is lower than the optical amplifier input optical power, a cold backup switching method is adopted, that is, by moving the reflector 1 and the reflector 2 to arrange and combine the transmitting collimator 1 and the transmitting collimator 2 and the receiving collimator 1 and the receiving collimator 2, so as to eliminate the fault;

[0015] Step 2, magnetic suspension angle range scanning;

[0016] If the cold backup method cannot eliminate the fault, the magnetic levitation platform is controlled by the controller and the magnetic levitation driver according to the telemetry of the photoelectric detector; first, the magnetic levitation platform is scanned from the inside to the outside in a spiral trajectory, and the scanning range is the maximum angle method achieved by the magnetic levitation platform, and the photoelectric detector telemetry and position are recorded during the scanning process; then the magnetic levitation platform is controlled to the position where the telemetry of the photoelectric detector is the largest; finally, the collimator is switched by moving the reflector 1 and the reflector 2 for cold backup, and the best combination is determined according to the position where the telemetry of the photoelectric detector is the largest;

[0017] Step 3, magnetic suspension displacement range scanning;

[0018] First, the magnetic levitation platform is displaced and scanned from the inside to the outside in a spiral trajectory. The scanning range is the maximum displacement method for the magnetic levitation platform, and the photoelectric detector telemetry and position are recorded during the scanning process. Then, the magnetic levitation platform is controlled to the position where the photoelectric detector telemetry is the largest. Finally, the collimator is switched by moving reflector one and reflector two as cold backup, and the best combination is determined according to the position where the photoelectric detector telemetry is the largest.

[0019] The beneficial effects of the present invention are:

[0020] The device of the present invention has a magnetic suspension control mechanism. If the system is completely paralyzed and cannot be adjusted after the spatial optical transmission channel based on the pull-out reflector, the optical path can be further adjusted through magnetic suspension control so that the input optical power value reaches the minimum input value of the optical amplifier, so that the amplified optical signal reaches the subsequent data detection system, realizing and completing the function of the optical communication system. This solves the risk of the original system being paralyzed and unable to adjust.

[0021] In the method of the present invention, the alignment of the magnetic suspension angle and displacement dimension and the switching of the spatial light transmission channel are completed through the processes of magnetic suspension angle range scanning, pulling out the spatial light transmission channel of the reflector, magnetic suspension displacement range scanning, and pulling out the spatial light transmission channel of the reflector. After multiple combinations of light transmission channels and magnetic suspension alignment, the optical power and signal-to-noise ratio are improved, and the performance of the optical communication system is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the adaptive control device for the in-cabin optical antenna based on magnetic levitation control. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0024] like Figure 1As shown, the present invention is an adaptive control device for an in-cabin optical antenna based on magnetic levitation control, and the device includes: an optical switch 1, a transmitting collimator 2, a transmitting collimator 3, a reflector 4, a reflector 5, a receiving collimator 6, a receiving collimator 7, a magnetic levitation platform 8, an optical switch 9, an optical coupler 10, an optical amplifier 11, a photodetector 12, a controller 13 and a magnetic levitation driver 14.

[0025] The transmitting collimator 1 2 , the transmitting collimator 2 3 , the reflector 1 4 , the reflector 2 5 , the receiving collimator 2 6 and the receiving collimator 1 7 constitute an optical antenna.

[0026] The optical coupler 10 is a 1:99 one-to-two optical coupler, 1% of the light enters the photodetector 12 for photodetector measurement; and 99% of the light enters the optical amplifier 11 for subsequent signal processing.

[0027] The photoelectric detector 12 is a near-infrared detector with a dynamic range, and can realize optical power detection in the range of -70dBm to -10dBm.

[0028] The optical amplifier 11 is an optical preamplifier with an input range of ≥15 dB and a dense wavelength division multiplexing optical amplifier with a flatness of ≤1 dB, covering the C band.

[0029] The reflector 1 4 and the reflector 2 5 are provided with a stretching mechanism, which is a one-dimensional guide rail driven by a motor and is used to move the reflector back and forth during the cold backup switching process to complete the spatial optical path switching.

[0030] The two output ports of the optical switch 1 are connected to the transmitting collimator 1 2 and the transmitting collimator 2 3 by optical fibers, respectively. The output optical axis of the transmitting collimator 1 2 and the output optical axis of the transmitting collimator 2 3 are placed at 90°, and the reflector 1 4 is placed at 45° with the output optical axis of the transmitting collimator 1 2, wherein the reflective surface of the reflector 1 4 faces the output optical axis of the transmitting collimator 2 3. The reflector 2 5 is placed at -45° with the output optical axis of the reflector 1 4, and there is a distance of 20 cm. The reflective surface of the reflector 2 5 faces the input optical axis of the receiving collimator 2 6, the input optical axis of the receiving collimator 1 7, and the input optical axis of the receiving collimator 2 6, and is placed at 90°. The output optical fibers of the receiving collimator 2 6 and the receiving collimator 1 7 are connected to the two input ports of the optical switch 2 9. The magnetic suspension platform 8 carries the reflector 2 5, the receiving collimator 2 6, and the receiving collimator 1 7. The output end of the optical switch 9, the optical coupler 10, and the optical amplifier 11 are connected in sequence by optical fiber, and the optical output end of the optical coupler 10 is connected to the photodetector 12 by optical fiber. The photodetector 12, the controller 13, the magnetic suspension drive 14, and the magnetic suspension platform 8 are connected in sequence by cables.

[0031] The working process of the in-cabin optical antenna adaptive control device based on magnetic levitation control of the present invention is as follows:

[0032] Normal working process: The signal light after high-speed modulation passes through the optical switch 1 to the transmitting collimator 2 3. The collimated spatial signal light beam is obtained through the transmitting collimator 2 3. The collimated spatial signal light is reflected by the reflector 1 4 and the reflector 2 5 and enters the receiving collimator 1 7 to be converted into optical fiber signal light. The optical fiber signal light is divided into two by the optical coupler 10, and 99% of the light enters the optical amplifier 11 to be amplified to the subsequent data detection system.

[0033] Cold backup switching process: Part of the light passes through the photoelectric detector 12 to obtain the optical power value, and the optical power value is used to determine whether the transmitting collimator 2 and the receiving collimator 2 are misaligned. If they are misaligned, the four arrangement channels of transmitting collimator 1 2, transmitting collimator 2 3 and receiving collimator 1 7, receiving collimator 2 6 are arranged and combined by moving the reflector 1 4 and the reflector 2 5, so as to eliminate the fault.

[0034] Magnetic levitation control working process: If the optical antenna still cannot be aligned through the cold backup switching process, the controller 13 sends an instruction to the magnetic levitation driver 14 to drive the magnetic levitation platform 8 to complete the magnetic levitation angle and displacement scanning alignment until the transmitting collimator 2 and the receiving collimator 2 are aligned.

[0035] A control method for an adaptive control device for an in-cabin optical antenna based on magnetic levitation control, the method comprising:

[0036] Step 1: Troubleshoot through cold backup;

[0037] Whether the transmitting collimator 1 and the receiving collimator 2 are aligned is determined according to the optical power value of the photodetector 12. If the optical power value is lower than the input optical power of the optical amplifier 11, a cold backup switching method is adopted, that is, by moving the reflector 1 4 and the reflector 2 5 to arrange and combine the transmitting collimator 1 2, the transmitting collimator 2 3 and the receiving collimator 1 7, the receiving collimator 2 6, so as to eliminate the fault.

[0038] Step 2: Magnetic levitation angle range scanning;

[0039] If the cold backup method cannot eliminate the fault, the magnetic suspension platform 8 is controlled by the controller 13 and the magnetic suspension driver 14 according to the telemetry of the photoelectric detector 12. First, the magnetic suspension platform 8 is scanned from the inside to the outside in a spiral trajectory, and the scanning range is the maximum angle method for the magnetic suspension platform 8. The photoelectric detector 12 telemetry and position are recorded during the scanning process. Then the magnetic suspension platform 8 is controlled to the position where the telemetry of the photoelectric detector 12 is the largest. Finally, the collimator is switched by moving the reflector 1 4 and the reflector 2 5 for cold backup, and the best combination is determined according to the position where the telemetry of the photoelectric detector 12 is the largest.

[0040] Step 3: Scan the magnetic suspension displacement range;

[0041] First, the magnetic suspension platform 8 is displaced and scanned from the inside to the outside in a spiral trajectory, and the scanning range is the maximum displacement method of the magnetic suspension platform. The scanning process records the telemetry and position of the photoelectric detector 12. Then the magnetic suspension platform 8 is controlled to the position where the telemetry of the photoelectric detector 12 is the largest. Finally, the collimator is switched by moving the reflector 1 and the reflector 2 cold backup, and the best combination is determined according to the position where the telemetry of the photoelectric detector is the largest.

[0042] The magnetic levitation angle range scanning, magnetic levitation displacement range scanning, and cold backup switching collimator in step 2 and step 3 can be adjusted through multiple combinations to achieve the best communication state.

Claims

1. An adaptive control device for in-cabin optical antenna based on magnetic levitation control, characterized in that: The device comprises: an optical switch 1 (1), a transmitting collimator 1 (2), a transmitting collimator 2 (3), a reflector 1 (4), a reflector 2 (5), a receiving collimator 2 (6), a receiving collimator 1 (7), a magnetic suspension platform (8), an optical switch 2 (9), an optical coupler (10), an optical amplifier (11), a photodetector (12), a controller (13) and a magnetic suspension driver (14); The transmitting collimator 1 (2), the transmitting collimator 2 (3), the reflector 1 (4), the reflector 2 (5), the receiving collimator 2 (6) and the receiving collimator 1 (7) constitute an optical antenna; The two output ports of the optical switch 1 (1) are respectively connected to the transmitting collimator 1 (2) and the transmitting collimator 2 (3) by optical fibers. The output optical axis of the transmitting collimator 1 (2) and the output optical axis of the transmitting collimator 2 (3) are placed at 90 degrees, and the reflector 1 (4) is placed at 45 degrees to the output optical axis of the transmitting collimator 1 (2), wherein the reflective surface of the reflector 1 (4) faces the output optical axis of the transmitting collimator 2 (3); the reflector 2 (5) is placed at -45 degrees to the output optical axis of the reflector 1 (4) and there is a distance of 20 cm, and the reflective surface of the reflector 2 (5) faces the input optical axis of the receiving collimator 2 (6) and the input optical axis of the receiving collimator 1 (7). The optical axis of the receiving collimator 2 (6) is placed at 90 degrees; the output optical fibers of the receiving collimator 2 (6) and the receiving collimator 1 (7) are connected to the two input ports of the optical switch 2 (9); the magnetic suspension platform (8) carries the reflector 2 (5), the receiving collimator 2 (6) and the receiving collimator 1 (7); the output end of the optical switch 2 (9), one end of the optical coupler (10) and the optical amplifier (11) are connected in sequence by optical fibers, and the other end of the optical coupler (10) is connected to the optical fiber of the photodetector (12); the photodetector (12), the controller (13), the magnetic suspension drive (14) and the magnetic suspension platform (8) are connected in sequence by cables; Normal working process: the signal light after high-speed modulation passes through the optical switch 1 (1) to the transmitting collimator 2 (3), and a collimated spatial signal light beam is obtained through the transmitting collimator 2 (3); the collimated spatial signal light is reflected by the reflector 1 (4) and the reflector 2 (5) and enters the receiving collimator 1 (7) to be converted into optical fiber signal light; the optical fiber signal light is split into two by the optical coupler (10), and most of the light enters the optical amplifier (11) to be amplified to the subsequent data detection system; Cold backup switching process: a portion of the light passes through the photoelectric detector (12) to obtain an optical power value, and based on the optical power value, it is determined whether the transmitting collimator 2 (3) and the receiving collimator 2 (6) are misaligned. If they are misaligned, the four arrangement channels of the transmitting collimator 1 (2), the transmitting collimator 2 (3) and the receiving collimator 1 (7), and the receiving collimator 2 (6) are arranged and combined by moving the reflector 1 (4) and the reflector 2 (5), thereby eliminating the fault; Magnetic levitation control working process: If the optical antenna still cannot be aligned after the cold backup switching process, the controller (13) sends an instruction to the magnetic levitation driver (14) to drive the magnetic levitation platform (8) to complete the magnetic levitation angle and displacement scanning alignment until the transmitting collimator 2 (3) and the receiving collimator 2 (6) are aligned.

2. The in-cabin optical antenna adaptive control device based on magnetic levitation control according to claim 1 is characterized in that: The optical coupler (10) is a 1:99 one-to-two optical coupler, 1% of the light enters the photodetector (12) for photodetector measurement, and 99% of the light enters the optical amplifier (11) for subsequent signal processing.

3. The in-cabin optical antenna adaptive control device based on magnetic levitation control according to claim 1, characterized in that: The photoelectric detector (12) is a near-infrared detector with a dynamic range, and realizes optical power detection in the range of -70 dBm to -10 dBm.

4. The in-cabin optical antenna adaptive control device based on magnetic levitation control according to claim 1, characterized in that: The optical amplifier (11) is an optical preamplifier with an input range of ≥15 dB and a dense wavelength division multiplexing optical amplifier with a flatness of ≤1 dB, covering the C band.

5. The in-cabin optical antenna adaptive control device based on magnetic levitation control according to claim 1, characterized in that: The reflector 1 (4) and the reflector 2 (5) are provided with a stretching mechanism, which is a one-dimensional guide rail driven by a motor and is used to move the reflector back and forth during the cold backup switching process to complete the spatial optical path switching.

6. A modulation method for an adaptive control device for an in-cabin optical antenna based on magnetic levitation control, characterized in that: The method comprises the following steps: Step 1: troubleshoot the problem through cold backup; According to the optical power value of the photodetector (12), it is determined whether the transmitting collimator 2 (3) and the receiving collimator 2 (6) are aligned. If the optical power value is lower than the optical power input to the optical amplifier (11), a cold backup switching method is adopted, that is, by moving the reflector 1 (4) and the reflector 2 (5) to arrange and combine the transmitting collimator 1 (2), the transmitting collimator 2 (3) and the receiving collimator 1 (7), the receiving collimator 2 (6), so as to eliminate the fault; Step 2, magnetic suspension angle range scanning; If the cold backup method cannot eliminate the fault, the magnetic suspension platform (8) is controlled by the controller (13) and the magnetic suspension drive (14) according to the telemetry of the photoelectric detector (12); first, the magnetic suspension platform (8) is scanned from the inside to the outside in a spiral trajectory, and the scanning range is the method for realizing the maximum angle of the magnetic suspension platform (8), and the photoelectric detector (12) telemetry and position are recorded during the scanning process; then, the magnetic suspension platform (8) is controlled to the position where the telemetry of the photoelectric detector (12) is the maximum; finally, the collimator is switched to cold backup by moving the reflector 1 (4) and the reflector 2 (5), and the best combination is determined according to the position where the telemetry of the photoelectric detector (12) is the maximum; Step 3, magnetic suspension displacement range scanning; First, the magnetic levitation platform (8) is displaced and scanned from the inside to the outside in a spiral trajectory manner, and the scanning range is the method for realizing the maximum displacement of the magnetic levitation platform. The remote measurement and position of the photoelectric detector (12) are recorded during the scanning process; then, the magnetic levitation platform (8) is controlled to the position where the remote measurement of the photoelectric detector (12) is the maximum; finally, the collimator is switched by moving the reflector cold backup, and the best combination is determined according to the position where the remote measurement of the photoelectric detector is the maximum.

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