Integrated laser and remote sensing machine, data transmission method, and data processing method
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-08-12
- Publication Date
- 2026-08-13
Smart Images
Figure CN2025113994_13082026_PF_FP_ABST
Abstract
Description
A laser remote sensing integrated machine, a data transmission method, and a data processing method.
[0001] Cross-references to related applications
[0002] This application claims priority to Chinese Patent Application No. 202510129905.7, filed on February 5, 2025, with the State Intellectual Property Office of the People's Republic of China, entitled "A Laser Remote Sensing Integrated Machine, Data Transmission Method and Data Processing Method", the entire contents of which are incorporated herein by reference. Technical Field
[0003] This application relates to the field of satellite networks, and in particular to a laser remote sensing integrated machine, a data transmission method, and a data processing method. Background Technology
[0004] With the rapid development of satellite network technology, satellites are becoming increasingly comprehensive in their functions. Satellite-to-ground laser communication and remote sensing imaging are two important satellite missions. Satellite laser communication generally uses lasers as the information carrier; due to its higher carrier frequency, the communication capacity of laser communication is far greater than that of traditional radio frequency communication. Satellite-based Earth remote sensing technology uses various sensors to collect, process, and finally image the electromagnetic wave information radiated and reflected by distant targets, thereby achieving comprehensive observation for the detection and identification of various features on the ground.
[0005] In related technologies, laser communication and Earth remote sensing imaging are two relatively independent tasks, which are accomplished through their respective independent systems.
[0006] However, the two independent systems occupy a large volume; in addition, in laser communication, due to factors such as uncertain pointing, it is difficult to establish a link accurately and efficiently. Summary of the Invention
[0007] This application provides a laser remote sensing integrated machine, a data transmission method, and a data processing method to realize laser remote sensing fusion transmission and to achieve accurate and efficient link establishment in laser communication.
[0008] In a first aspect, embodiments of this application provide a laser remote sensing integrated machine, including: a first angle adjustment device, a preprocessing device, a remote sensing detection subsystem, a laser subsystem, and a data processing device;
[0009] The first angle adjustment device is used to project the remote sensing detection signal and the first laser signal onto the preprocessing device;
[0010] The preprocessing device is used to transmit the first optical path corresponding to the remote sensing detection signal to the remote sensing detection subsystem; and to transmit the second optical path corresponding to the first laser signal to the laser subsystem;
[0011] The remote sensing detection subsystem is used to convert the first optical path into a signal to obtain a remote sensing image digital signal, and send the remote sensing image digital signal to the data processing device.
[0012] The data processing device is used to extract information from the digital signal of the remote sensing image to obtain link establishment reference data; and to control the first angle adjustment device and the laser subsystem to adjust the link establishment angle based on the link establishment reference data.
[0013] The laser subsystem is used to restore the second optical path to the first laser signal and send the laser receiving data corresponding to the first laser signal to the data processing device.
[0014] In some optional implementations, the data processing apparatus is further configured to:
[0015] Send downlink remote sensing data to the laser subsystem;
[0016] The laser subsystem is also used to generate a second laser signal corresponding to the downlink remote sensing data and transmit the second laser signal to the first angle adjustment device;
[0017] The first angle adjustment device is also used to project the second laser signal onto the ground.
[0018] In some alternative implementations, the preprocessing apparatus includes a main optical system and a beam splitter;
[0019] The main optical system is used to focus the remote sensing signal to obtain a first optical path; and to focus the first laser signal to obtain a second optical path.
[0020] The beam splitter is used to transmit the first optical path to the remote sensing subsystem and the second optical path to the laser subsystem.
[0021] In some alternative implementations, the laser subsystem includes an Acquisition Tracking Pointing (ATP) subsystem and a laser communication unit;
[0022] The ATP subsystem is used to recover the second optical path into a first laser signal, capture and maintain the laser communication link based on the first laser signal, and send the first laser signal to the laser communication device.
[0023] The laser communication device is used to modulate and demodulate the first laser signal to obtain the laser received data.
[0024] In some optional implementations, the data processing apparatus is specifically used for:
[0025] Information is extracted from the digital signal of the remote sensing image to obtain first link-building reference data characterizing climate and second link-building reference data characterizing location;
[0026] Based on the first chain establishment reference data and the second chain establishment reference data, the first angle adjustment device and the second angle adjustment device in the ATP subsystem are controlled to adjust the chain establishment angle.
[0027] In some optional implementations, the data processing apparatus is specifically used for:
[0028] Based on the first link establishment reference data, candidate devices are selected from the ground devices corresponding to the digital signals of the remote sensing images;
[0029] Select a target device from the candidate devices based on the second chain establishment reference data;
[0030] Based on the second link establishment reference data of the target device, determine the first link establishment angle corresponding to the first angle adjustment device and the second link establishment angle corresponding to the second angle adjustment device;
[0031] The first angle adjustment device is adjusted to establish a chain angle based on the first chain establishment angle; and the second angle adjustment device is adjusted to establish a chain angle based on the second chain establishment angle.
[0032] In some optional implementations, the data processing apparatus is specifically used for:
[0033] Based on the first link establishment reference data, candidate devices are selected from the ground devices corresponding to the digital signals of the remote sensing images;
[0034] Select a target device from the candidate devices based on the second chain establishment reference data;
[0035] The second link establishment reference data of the target device is sent to the satellite control platform, and the control platform determines the third link establishment angle corresponding to the first angle adjustment device and the fourth link establishment angle corresponding to the second angle adjustment device; the link establishment angle of the first angle adjustment device is adjusted based on the third link establishment angle; and the link establishment angle of the second angle adjustment device is adjusted based on the fourth link establishment angle.
[0036] In some alternative implementations, the data processing apparatus includes some or all of a laser-managed field-programmable gate array (FPGA), a remote sensing management FPGA, and an image processing chip.
[0037] Secondly, embodiments of this application provide a data transmission method for satellite simulation using any of the laser remote sensing integrated machines described in the first aspect above.
[0038] Thirdly, embodiments of this application provide a data processing method, applied to any of the data processing apparatuses described in the first aspect above, comprising:
[0039] Information is extracted from the digital signals of remote sensing images sent by the remote sensing detection subsystem to obtain link establishment reference data;
[0040] Based on the aforementioned link establishment reference data, the first angle adjustment device and the laser subsystem are controlled to adjust the link establishment angle.
[0041] Some optional implementations also include:
[0042] The downlink remote sensing data is sent to the laser subsystem, which generates a second laser signal corresponding to the downlink remote sensing data and transmits the second laser signal to the first angle adjustment device, which then projects the second laser signal onto the ground.
[0043] In some optional implementations, information is extracted from the digital signals of remote sensing images transmitted by the remote sensing subsystem to obtain link establishment reference data, including:
[0044] Information is extracted from the digital signal of the remote sensing image to obtain first link-building reference data characterizing climate and second link-building reference data characterizing location;
[0045] Based on the established link reference data, the first angle adjustment device and the laser subsystem are controlled to adjust the established link angle, including:
[0046] Based on the first chain establishment reference data and the second chain establishment reference data, the first angle adjustment device and the second angle adjustment device in the laser subsystem are controlled to adjust the chain establishment angle.
[0047] In some optional implementations, based on the first link establishment reference data and the second link establishment reference data, controlling the first angle adjustment device and the second angle adjustment device in the laser subsystem to adjust the link establishment angle includes:
[0048] Based on the first link establishment reference data, candidate devices are selected from the ground devices corresponding to the digital signals of the remote sensing images;
[0049] Select a target device from the candidate devices based on the second chain establishment reference data;
[0050] Based on the second link establishment reference data of the target device, determine the first link establishment angle corresponding to the first angle adjustment device and the second link establishment angle corresponding to the second angle adjustment device;
[0051] The first angle adjustment device is adjusted to establish a chain angle based on the first chain establishment angle; and the second angle adjustment device is adjusted to establish a chain angle based on the second chain establishment angle.
[0052] In some optional implementations, based on the first link establishment reference data and the second link establishment reference data, controlling the first angle adjustment device and the second angle adjustment device in the laser subsystem to adjust the link establishment angle includes:
[0053] Based on the first link establishment reference data, candidate devices are selected from the ground devices corresponding to the digital signals of the remote sensing images;
[0054] Select a target device from the candidate devices based on the second chain establishment reference data;
[0055] The second link establishment reference data of the target device is sent to the satellite control platform, and the control platform determines the third link establishment angle corresponding to the first angle adjustment device and the fourth link establishment angle corresponding to the second angle adjustment device; the link establishment angle of the first angle adjustment device is adjusted based on the third link establishment angle; and the link establishment angle of the second angle adjustment device is adjusted based on the fourth link establishment angle.
[0056] Fourthly, embodiments of this application provide a data processing apparatus, including:
[0057] The information extraction module is used to extract information from the digital signals of remote sensing images sent by the remote sensing detection subsystem to obtain link establishment reference data;
[0058] The laser processing module is used to control the first angle adjustment device and the laser subsystem to adjust the link establishment angle based on the link establishment reference data.
[0059] In some alternative implementations, a remote sensing processing module is also included, for:
[0060] The downlink remote sensing data is sent to the laser subsystem, which generates a second laser signal corresponding to the downlink remote sensing data and transmits the second laser signal to the first angle adjustment device, which then projects the second laser signal onto the ground.
[0061] In some optional implementations, the information extraction module is specifically used for:
[0062] Information is extracted from the digital signal of the remote sensing image to obtain first link-building reference data characterizing climate and second link-building reference data characterizing location;
[0063] The laser processing module is specifically used for:
[0064] Based on the first chain establishment reference data and the second chain establishment reference data, the first angle adjustment device and the second angle adjustment device in the laser subsystem are controlled to adjust the chain establishment angle.
[0065] In some alternative implementations, the laser processing module is specifically used for:
[0066] Based on the first link establishment reference data, candidate devices are selected from the ground devices corresponding to the digital signals of the remote sensing images;
[0067] Select a target device from the candidate devices based on the second chain establishment reference data;
[0068] Based on the second link establishment reference data of the target device, determine the first link establishment angle corresponding to the first angle adjustment device and the second link establishment angle corresponding to the second angle adjustment device;
[0069] The first angle adjustment device is adjusted to establish a chain angle based on the first chain establishment angle; and the second angle adjustment device is adjusted to establish a chain angle based on the second chain establishment angle.
[0070] In some alternative implementations, the laser processing module is specifically used for:
[0071] Based on the first link establishment reference data, candidate devices are selected from the ground devices corresponding to the digital signals of the remote sensing images;
[0072] Select a target device from the candidate devices based on the second chain establishment reference data;
[0073] The second link establishment reference data of the target device is sent to the satellite control platform, and the control platform determines the third link establishment angle corresponding to the first angle adjustment device and the fourth link establishment angle corresponding to the second angle adjustment device; the link establishment angle of the first angle adjustment device is adjusted based on the third link establishment angle; and the link establishment angle of the second angle adjustment device is adjusted based on the fourth link establishment angle.
[0074] Fifthly, embodiments of this application provide an electronic device including at least one processor and at least one memory, wherein the memory stores a computer program that, when executed by the processor, causes the processor to perform any of the methods described in the second or third aspect above.
[0075] In a sixth aspect, embodiments of this application provide a computer-readable storage medium storing a computer program executable by a processor, which, when run on the processor, causes the processor to perform any of the methods described in the second or third aspect above.
[0076] The above scheme integrates laser communication and remote sensing imaging capabilities into a unified system, reducing the footprint and increasing the functional density of the payload. Through the integration of some devices, laser communication and remote sensing imaging share the first angle adjustment device, preprocessing device, and data processing device, reducing the overhead caused by data transmission between different devices and effectively improving data processing efficiency. Furthermore, the data processing device extracts information from the high-resolution remote sensing image digital signal to obtain reference data for link establishment (link establishment reference data). Based on this link establishment reference data, the first angle adjustment device and the laser subsystem are controlled to adjust the link establishment angle, reducing system pointing errors and improving link establishment efficiency and success rate. Attached Figure Description
[0077] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0078] Figure 1 is a schematic diagram of the first type of laser remote sensing integrated machine provided in the embodiment of this application;
[0079] Figure 2 is a schematic diagram of the second type of laser remote sensing integrated machine provided in the embodiment of this application;
[0080] Figure 3 is a schematic diagram of the third type of laser remote sensing integrated machine provided in the embodiments of this application;
[0081] Figure 4 is a schematic diagram of the fourth type of laser remote sensing integrated machine provided in the embodiments of this application;
[0082] Figure 5 shows a first type of remote sensing image digital signal provided in an embodiment of this application;
[0083] Figure 6 shows a second type of remote sensing image digital signal provided in an embodiment of this application;
[0084] Figure 7 shows a third type of remote sensing image digital signal provided in an embodiment of this application;
[0085] Figure 8 is a schematic flowchart of the first data processing method provided in the embodiments of this application;
[0086] Figure 9 is a schematic flowchart of the second data processing method provided in the embodiments of this application;
[0087] Figure 10 is a schematic flowchart of the third data processing method provided in the embodiments of this application;
[0088] Figure 11 is a schematic flowchart of the fourth data processing method provided in the embodiments of this application;
[0089] Figure 12 is a schematic flowchart of the fifth data processing method provided in the embodiments of this application;
[0090] Figure 13 is a schematic diagram of the structure of a data processing device provided in an embodiment of this application;
[0091] Figure 14 is a schematic diagram of the structure of the electronic device provided in the embodiment of this application. Detailed Implementation
[0092] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0093] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0094] In the description of this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two devices. Those skilled in the art can understand the specific meaning of the above term in this application based on the specific circumstances.
[0095] With the rapid development of satellite network technology, satellites are becoming increasingly comprehensive in their functions. Satellite-to-ground laser communication and remote sensing imaging are two important satellite missions. Satellite optical communication generally uses lasers as the information carrier. Due to its higher carrier frequency, the communication capacity of optical communication is far greater than that of traditional radio frequency communication. Satellite-based Earth remote sensing technology uses various sensors to collect, process, and finally image the electromagnetic wave information radiated and reflected by distant targets, thereby achieving comprehensive observation for the detection and identification of various features on the ground.
[0096] In related technologies, laser communication and Earth remote sensing imaging are two relatively independent tasks, which are accomplished through their respective independent systems.
[0097] However, the two independent systems occupy a large amount of space.
[0098] Furthermore, the beam angle in laser communication is much lower than in traditional radio frequency communication, increasing the difficulty of aiming and acquisition, resulting in long link establishment times and low success rates. For example, after a satellite enters orbit, factors such as weightlessness and impacts during the active phase cause large initial pointing uncertainties in the optical antenna, with coordinate system and optical axis changes reaching the milliradian (mrad) level, far exceeding the laser beam divergence angle and even surpassing the acquisition and tracking field of view. This necessitates specialized on-orbit calibration or pointing correction, leading to excessively long initial link establishment times. When the satellite platform experiences thermal deformation of its panels under sunlight, it further degrades the pointing uncertainty, reaching the mrad level, causing subsequent link establishment times to be extended again or even fail. These problems severely impact the on-orbit practicality of laser communication links.
[0099] Based on this, embodiments of this application provide a laser remote sensing integrated machine, a data transmission method, and a data processing method to achieve laser remote sensing fusion transmission and to establish a precise and efficient link in laser communication.
[0100] Referring to Figure 1, this embodiment provides a first type of laser remote sensing integrated machine, including: a first angle adjustment device, a preprocessing device, a remote sensing detection subsystem, a laser subsystem, and a data processing device;
[0101] A first angle adjustment device is used to project the remote sensing detection signal and the first laser signal onto the preprocessing device;
[0102] A preprocessing device is used to transmit the first optical path corresponding to the remote sensing detection signal to the remote sensing detection subsystem; and to transmit the second optical path corresponding to the first laser signal to the laser subsystem;
[0103] The remote sensing detection subsystem is used to convert the signal of the first optical path to obtain the digital signal of the remote sensing image, and send the digital signal of the remote sensing image to the data processing device.
[0104] The data processing device is used to extract information from the digital signals of remote sensing images to obtain link establishment reference data; and to control the first angle adjustment device and the laser subsystem to adjust the link establishment angle based on the link establishment reference data.
[0105] The laser subsystem is used to restore the second optical path to the first laser signal and send the laser receiving data corresponding to the first laser signal to the data processing device.
[0106] The aforementioned first angle adjustment device is an angle-adjustable light reflection device that projects ground light signals (remote sensing signals and the first laser signal) onto the preprocessing device. In other words, remote sensing and laser share this first angle adjustment device.
[0107] This embodiment does not limit the specific implementation of an angle adjustment device, such as a two-dimensional pendulum mirror, a two-dimensional turntable, etc.
[0108] Taking a two-dimensional oscillating mirror as an example, by adjusting the direction of the optical axis of the oscillating mirror (adjusting the link establishment angle), coarse pointing tracking of laser communication can be achieved, while also expanding the range of Earth remote sensing imaging. In the absence of Earth-to-ground laser communication, wide-area remote sensing images can be acquired by controlling the oscillating mirror to enter a ring-scan mode.
[0109] This embodiment does not specifically limit the remote sensing detection signal and the first laser signal. For example, the infrared band can be used as the spectral band for laser communication (i.e., the first laser signal is an infrared light signal), and the visible spectrum can be used as the main imaging spectrum for remote sensing (i.e., the remote sensing detection signal is a visible light signal).
[0110] The aforementioned preprocessing device is responsible for focusing the signal and splitting the remote sensing and laser beams. It is also a device shared by both remote sensing and laser systems.
[0111] The aforementioned remote sensing detection subsystem is a module specifically designed for remote sensing. It performs signal conversion on the first optical path (converting optical signals into electrical signals) to obtain digital signals of the remote sensing image; and sends the digital signals of the remote sensing image to the data processing device for further analysis and processing.
[0112] The aforementioned data processing device is a module that fuses remote sensing and laser information, bridging the information flow between laser communication and remote sensing imaging. The data processing device extracts information from the digital signals of remote sensing images to obtain the link-establishment reference data required for laser imaging; based on the link-establishment reference data, it controls the first angle adjustment device and the laser subsystem to adjust the link-establishment angle. Furthermore, the data processing device can also store the digital signals of remote sensing images and transmit them to the ground for further analysis.
[0113] The laser subsystem is a dedicated module for lasers. Since lasers do not require imaging, there is no need to focus the laser signal. By restoring the second optical path to the first laser signal, the original laser signal before focusing, i.e., the first laser signal, is obtained. The laser receiving data is obtained by processing the first laser signal and then sent to the data processing device.
[0114] The data processing device saves the laser received data and forwards it to the satellite platform. It can also send data to the ground according to the requirements of the satellite platform.
[0115] Figure 1 above is only an exemplary illustration of the laser remote sensing integrated machine. In practice, other devices are also installed in the laser remote sensing integrated machine, which will not be described in detail here.
[0116] The above scheme integrates laser communication and remote sensing imaging capabilities into a unified system, reducing the footprint and increasing the functional density of the payload. Through the integration of some devices, laser communication and remote sensing imaging share the first angle adjustment device, preprocessing device, and data processing device, reducing the overhead caused by data transmission between different devices and effectively improving data processing efficiency. Furthermore, the data processing device extracts information from the high-resolution remote sensing image digital signal to obtain reference data for link establishment (link establishment reference data). Based on this link establishment reference data, the first angle adjustment device and the laser subsystem are controlled to adjust the link establishment angle, reducing system pointing errors and improving link establishment efficiency and success rate.
[0117] In practice, with the increasing number of remote sensing satellites in orbit and the development of technologies such as large-aperture optics and high-resolution cameras, the quality of remote sensing images acquired by satellite systems is becoming increasingly higher, leading to an exponential increase in the demand for high-capacity data transmission. However, current traditional satellite-to-ground communication technologies using microwave as a medium are limited by bandwidth, making it difficult to significantly improve data transmission capacity and rate. Therefore, the problem of transmitting massive amounts of data has become a key factor restricting the development of Earth remote sensing application technologies.
[0118] Referring to Figure 2, in some optional embodiments, the data processing device is further used for:
[0119] Send downlink remote sensing data to the laser subsystem;
[0120] The laser subsystem is also used to generate a second laser signal corresponding to the downlink remote sensing data and to transmit the second laser signal to the first angle adjustment device;
[0121] The first angle adjustment device is also used to project the second laser signal onto the ground.
[0122] In this embodiment, the laser subsystem converts downlink remote sensing data into a second laser signal, providing a fast transmission channel for massive amounts of remote sensing data through a high-speed laser link, without occupying other communication bandwidth resources.
[0123] This embodiment does not specifically limit the downlink remote sensing data mentioned above. It may include remote sensing image digital signals, that is, the data processing device directly sends the remote sensing image digital signals to the laser subsystem and transmits them to the ground in a transparent forwarding mode, thereby achieving a near real-time situational awareness working mode by imaging and transmitting simultaneously.
[0124] The above solution provides a fast channel for the distribution of massive amounts of remote sensing data through a high-speed laser link, which can effectively reduce the data storage pressure on the satellite platform, improve the timeliness of remote sensing data applications, and solve the problem of limited bandwidth in satellite-to-ground communication.
[0125] Referring to Figure 3, this embodiment provides a second type of laser remote sensing integrated machine, including: a first angle adjustment device, a main optical system, a beam splitting device, a remote sensing detection subsystem, a laser subsystem, and a data processing device.
[0126] In this embodiment, the preprocessing device includes a main optical system and a beam splitter;
[0127] The main optical system is used to focus the remote sensing signal to obtain a first optical path; and to focus the first laser signal to obtain a second optical path;
[0128] The beam splitter is used to transmit the first optical path to the remote sensing subsystem and the second optical path to the laser subsystem.
[0129] In this embodiment, the main optical system focuses the received remote sensing signal and the first laser signal to form two optical paths; then, the first optical path corresponding to the remote sensing is transmitted to the remote sensing subsystem and the second optical path corresponding to the laser is transmitted to the laser subsystem through a beam splitter.
[0130] Referring to Figure 4, this embodiment provides a fourth type of laser remote sensing integrated machine, including: a first angle adjustment device, a main optical system, a beam splitting device, a remote sensing detection subsystem, an ATP subsystem, a laser communication device, and a data processing device.
[0131] In this embodiment, the laser subsystem includes an ATP subsystem and a laser communication device;
[0132] The ATP subsystem is used to recover the second optical path into the first laser signal, capture and maintain the laser communication link based on the first laser signal, and send the first laser signal to the laser communication device.
[0133] A laser communication device is used to modulate and demodulate a first laser signal to obtain laser received data.
[0134] For example, in the ATP subsystem, the optical antenna realizes the laser receiving and receiving path design, and forms the beam required for laser communication from the second optical path;
[0135] In the ATP subsystem, the ATP unit enables the capture, tracking, and aiming capabilities between laser terminals, and performs the capture and maintenance of the laser communication link;
[0136] Laser communication devices enable functions such as modulation and demodulation of photoelectric signals, transmission and reception of optical signals.
[0137] Referring to Figure 4, in some optional embodiments, the data processing device is equipped with computing boards such as a laser management FPGA, a remote sensing management FPGA, and an image processing chip.
[0138] The remote sensing management FPGA, after receiving the raw imaging data (digital remote sensing image signal), forwards the digital remote sensing image signal to the satellite platform's storage unit for data storage, and simultaneously forwards it to the image processing chip for remote sensing image interpretation, extracting the information required for link establishment (such as the link establishment reference data mentioned above). During the link establishment attempt between the satellite and the ground laser terminal, the image processing chip sends the extracted link establishment reference data to the laser management FPGA, which guides the ATP subsystem to establish the link based on the link establishment reference data. The laser management FPGA receives laser reception data sent by the laser communication unit and forwards it to the satellite platform (e.g., to the satellite platform's storage unit for data storage), while simultaneously sending downlink laser data to the ground according to the satellite platform's requirements.
[0139] As described above, in some embodiments, the downlink remote sensing data includes remote sensing image digital signals. The data processing device needs to directly transmit the remote sensing image digital signals to the laser subsystem in a transparent forwarding mode. Based on this, after the satellite-to-ground laser communication link is established, the remote sensing management FPGA can directly forward the remote sensing image digital signals to the laser management FPGA. The laser management FPGA then directly transmits the remote sensing image digital signals to the laser subsystem, achieving near real-time downlink data transmission in a transparent forwarding mode, enabling the ground system to quickly acquire the surrounding situation.
[0140] The laser management FPGA, remote sensing management FPGA, and image processing chip in the above data processing device are only illustrative examples. In practice, other computing boards can be used in the data processing device to realize functions such as data forwarding, information extraction, and data storage, which will not be elaborated here.
[0141] In some alternative implementations, the data processing apparatus is specifically used for:
[0142] Information is extracted from the digital signals of remote sensing images to obtain first link-building reference data characterizing climate and second link-building reference data characterizing location;
[0143] Based on the first chain-building reference data and the second chain-building reference data, the chain-building angle is adjusted by controlling the first angle adjustment device and the second angle adjustment device in the ATP subsystem.
[0144] As mentioned above, the pointing of optical antennas has systematic errors, which leads to long link establishment time and low link establishment success rate.
[0145] In addition, some climatic factors can also affect laser transmission. For example, atmospheric turbulence and clouds have a significant impact on satellite-to-ground laser communication links. For the uplink, the laser beam diverges less during transmission through the atmosphere and is greatly affected by atmospheric turbulence, resulting in off-axis flicker at the receiver. For the downlink, the laser beam diverges considerably upon entering the atmosphere, mainly manifesting as laser intensity flicker and wavefront distortion at the optical ground equipment receiver.
[0146] As shown in Figure 5, the ground station area (Ground Station 1) in some remote sensing image digital signals is not affected by atmospheric turbulence, clouds, fog, etc.
[0147] As shown in Figure 6, some remote sensing image digital signals show the influence of clouds and fog in the ground station area (ground station 2);
[0148] As shown in Figure 7, some remote sensing image digital signals show that the ground station area (ground station 3) is affected by atmospheric turbulence.
[0149] Based on this, this embodiment performs two-dimensional analysis based on high-resolution remote sensing image digital signals: by extracting features of ground equipment, second link-building reference data representing the location of (ground equipment) is obtained; by extracting climate characteristics, first link-building reference data representing climate is obtained.
[0150] This embodiment does not specifically limit the first link establishment reference data and the second link establishment reference data. For example, after determining the image location information of the ground equipment, the actual location of the ground equipment is used as the second link establishment reference data, or the direction of the satellite relative to the ground equipment is used as the second link establishment reference data. Whether there are target climate characteristics in the ground station area (such as whether there are atmospheric turbulence or other characteristics that affect link establishment) and the level of the target climate characteristics (such as the severity of atmospheric turbulence) are used as the first link establishment reference data, or the satellite-to-ground laser link quality is evaluated based on multiple climate indicators, and the satellite-to-ground laser link quality information is used as the first link establishment reference data.
[0151] Since optical antenna pointing system errors and weather conditions can affect laser link establishment, the link establishment angle is adjusted by controlling the first angle adjustment device and the second angle adjustment device in the ATP subsystem, based on the first link establishment reference data and the second link establishment reference data. This allows for more efficient and accurate link establishment.
[0152] In some alternative implementations, the data processing apparatus is specifically used for:
[0153] Candidate devices are selected from ground devices corresponding to digital signals of remote sensing images based on the first link establishment reference data;
[0154] Select the target device from the candidate devices based on the second chain establishment reference data;
[0155] Based on the second link establishment reference data of the target device, determine the first link establishment angle corresponding to the first angle adjustment device and the second link establishment angle corresponding to the second angle adjustment device.
[0156] The first angle adjustment device adjusts the chain-building angle based on the first chain-building angle; and the second angle adjustment device adjusts the chain-building angle based on the second chain-building angle.
[0157] In practice, ground equipment is distributed across different areas, and atmospheric turbulence typically only occurs in certain regions. Therefore, this embodiment first selects candidate equipment from the ground equipment corresponding to the digital signals of the remote sensing images based on the first link establishment reference data. In other words, it seeks transmission windows less affected by weather conditions for laser communication, reducing the impact of atmospheric turbulence and other factors on satellite-to-ground laser communication.
[0158] Since there may be multiple candidate devices (there are multiple candidate devices that are not affected by the weather or are less affected by the weather), it is necessary to select the target device to finally achieve laser communication.
[0159] Based on the second chain establishment reference data, target devices that are in suitable locations and less affected by climate can be selected from the candidate devices.
[0160] After selecting the target device, directional guidance is performed based on the second link establishment reference data. In implementation, the data processing device determines the first link establishment angle corresponding to the first angle adjustment device and the second link establishment angle corresponding to the second angle adjustment device based on the second link establishment reference data of the target device; then, the link establishment angle of the first angle adjustment device is adjusted based on the first link establishment angle; and the link establishment angle of the second angle adjustment device is adjusted based on the second link establishment angle. Directional guidance using the second link establishment reference data allows for more precise link establishment angle adjustments, improving link establishment efficiency and accuracy.
[0161] In some alternative implementations, the data processing apparatus is specifically used for:
[0162] Candidate devices are selected from ground devices corresponding to digital signals of remote sensing images based on the first link establishment reference data;
[0163] Select the target device from the candidate devices based on the second chain establishment reference data;
[0164] The second link establishment reference data of the target device is sent to the satellite control platform. The control platform determines the third link establishment angle corresponding to the first angle adjustment device and the fourth link establishment angle corresponding to the second angle adjustment device. The link establishment angle of the first angle adjustment device is adjusted based on the third link establishment angle. The link establishment angle of the second angle adjustment device is adjusted based on the fourth link establishment angle.
[0165] The process of selecting the target device can be referred to the above embodiments, and will not be repeated here.
[0166] After selecting the target device, directional guidance is performed based on the second link establishment reference data. During implementation, the data processing device can send the second link establishment reference data of the target device to the satellite's control platform. The control platform then makes more systematic adjustments, such as considering other satellite factors, to determine the third link establishment angle corresponding to the first angle adjustment device, and the fourth link establishment angle corresponding to the second angle adjustment device. The first angle adjustment device is then adjusted based on the third link establishment angle, and the second angle adjustment device is adjusted based on the fourth link establishment angle. Directional guidance using the second link establishment reference data allows for more precise link establishment angle adjustments, improving link establishment efficiency and accuracy.
[0167] As shown in Figure 8, based on the same inventive concept, this application provides a data processing method applied to the above-mentioned data processing apparatus, including:
[0168] Step S801: Extract information from the digital signals of remote sensing images sent by the remote sensing detection subsystem to obtain link establishment reference data;
[0169] Step S802: Based on the link establishment reference data, control the first angle adjustment device and the laser subsystem to adjust the link establishment angle.
[0170] In the above scheme, the data processing device extracts information from the digital signal of the high-resolution remote sensing image to obtain reference data for guiding link establishment (link establishment reference data); based on the link establishment reference data, the first angle adjustment device and the laser subsystem are controlled to adjust the link establishment angle, thereby reducing the system pointing error and improving the link establishment efficiency and success rate.
[0171] Referring to Figure 9, an embodiment of this application provides a second data processing method, including:
[0172] Step S901: Extract information from the digital signals of remote sensing images sent by the remote sensing detection subsystem to obtain link establishment reference data.
[0173] Step S902: Based on the link establishment reference data, control the first angle adjustment device and the laser subsystem to adjust the link establishment angle.
[0174] Step S903: Send downlink remote sensing data to the laser subsystem so that the laser subsystem generates a second laser signal corresponding to the downlink remote sensing data and transmits the second laser signal to the first angle adjustment device, and projects the second laser signal onto the ground through the first angle adjustment device.
[0175] This embodiment does not limit the order of steps S901-S902 and step S903. Steps S901-S902 can be executed first, or step S903 can be executed first, or steps S901-S902 and step S903 can be executed in parallel.
[0176] For cases where the downlink remote sensing data is a digital signal of a remote sensing image, steps S901 to S902 need to be executed first, followed by step S903.
[0177] The above solution provides a fast channel for the distribution of massive amounts of remote sensing data through a high-speed laser link, which can effectively reduce the data storage pressure on the satellite platform, improve the timeliness of remote sensing data applications, and solve the problem of limited bandwidth in satellite-to-ground communication.
[0178] Referring to Figure 10, this application embodiment provides a third data processing method, including:
[0179] Step S1001: Extract information from the digital signal of the remote sensing image to obtain first link-building reference data characterizing climate and second link-building reference data characterizing location;
[0180] Step S1002: Based on the first link establishment reference data and the second link establishment reference data, control the first angle adjustment device and the second angle adjustment device in the laser subsystem to adjust the link establishment angle.
[0181] Referring to Figure 11, this application embodiment provides a fourth data processing method, including:
[0182] Step S1101: Extract information from the digital signal of the remote sensing image to obtain first link-building reference data characterizing climate and second link-building reference data characterizing location;
[0183] Step S1102: Select candidate devices from the ground devices corresponding to the remote sensing image digital signals based on the first link establishment reference data;
[0184] Step S1103: Select a target device from the candidate devices based on the second connection establishment reference data;
[0185] Step S1104: Determine the first connection establishment angle corresponding to the first angle adjustment device and the second connection establishment angle corresponding to the second angle adjustment device based on the second connection establishment reference data of the target device;
[0186] Step S1105: Adjust the chain-building angle of the first angle adjustment device based on the first chain-building angle; and adjust the chain-building angle of the second angle adjustment device based on the second chain-building angle.
[0187] Referring to Figure 12, this application embodiment provides a fifth data processing method, including:
[0188] Step S1201: Extract information from the digital signal of the remote sensing image to obtain first link-building reference data characterizing climate and second link-building reference data characterizing location;
[0189] Step S1202: Select candidate devices from the ground devices corresponding to the remote sensing image digital signals based on the first link establishment reference data;
[0190] Step S1203: Select a target device from the candidate devices based on the second connection establishment reference data;
[0191] Step S1204: Send the second link establishment reference data of the target device to the satellite control platform, and determine the third link establishment angle corresponding to the first angle adjustment device and the fourth link establishment angle corresponding to the second angle adjustment device through the control platform; adjust the link establishment angle of the first angle adjustment device based on the third link establishment angle; and adjust the link establishment angle of the second angle adjustment device based on the fourth link establishment angle.
[0192] For a detailed implementation of this data processing method, please refer to the implementation of the laser remote sensing integrated machine described above. Repeated details will not be repeated here.
[0193] As shown in Figure 13, based on the same inventive concept, this application provides a data processing device 1300, which includes:
[0194] The information extraction module 1301 is used to extract information from the digital signals of remote sensing images sent by the remote sensing detection subsystem to obtain link establishment reference data;
[0195] The laser processing module 1302 is used to control the first angle adjustment device and the laser subsystem to adjust the link establishment angle based on the link establishment reference data.
[0196] In some alternative implementations, a remote sensing processing module 1303 is also included, for:
[0197] The downlink remote sensing data is sent to the laser subsystem, which generates a second laser signal corresponding to the downlink remote sensing data and transmits the second laser signal to the first angle adjustment device, which then projects the second laser signal onto the ground.
[0198] In some optional implementations, the information extraction module 1301 is specifically used for:
[0199] Information is extracted from the digital signal of the remote sensing image to obtain first link-building reference data characterizing climate and second link-building reference data characterizing location;
[0200] Laser processing module 1302 is specifically used for:
[0201] Based on the first chain establishment reference data and the second chain establishment reference data, the first angle adjustment device and the second angle adjustment device in the laser subsystem are controlled to adjust the chain establishment angle.
[0202] In some optional implementations, the laser processing module 1302 is specifically used for:
[0203] Based on the first link establishment reference data, candidate devices are selected from the ground devices corresponding to the digital signals of the remote sensing images;
[0204] Select a target device from the candidate devices based on the second chain establishment reference data;
[0205] Based on the second link establishment reference data of the target device, determine the first link establishment angle corresponding to the first angle adjustment device and the second link establishment angle corresponding to the second angle adjustment device;
[0206] The first angle adjustment device is adjusted to establish a chain angle based on the first chain establishment angle; and the second angle adjustment device is adjusted to establish a chain angle based on the second chain establishment angle.
[0207] In some optional implementations, the laser processing module 1302 is specifically used for:
[0208] Based on the first link establishment reference data, candidate devices are selected from the ground devices corresponding to the digital signals of the remote sensing images;
[0209] Select a target device from the candidate devices based on the second chain establishment reference data;
[0210] The second link establishment reference data of the target device is sent to the satellite control platform, and the control platform determines the third link establishment angle corresponding to the first angle adjustment device and the fourth link establishment angle corresponding to the second angle adjustment device; the link establishment angle of the first angle adjustment device is adjusted based on the third link establishment angle; and the link establishment angle of the second angle adjustment device is adjusted based on the fourth link establishment angle.
[0211] For a detailed implementation of the data processing device method, please refer to the implementation of the laser remote sensing integrated machine described above; details that are repeated will not be repeated here.
[0212] As shown in Figure 14, based on the same inventive concept, this application provides an electronic device 1400, including: a processor 1401 and a memory 1402;
[0213] Memory 1402 may be volatile memory, such as random-access memory (RAM); memory 1402 may also be non-volatile memory, such as read-only memory, flash memory, hard disk drive (HDD), or solid-state drive (SSD); or memory 1402 may be any other medium capable of carrying or storing desired program code having the form of instructions or data structures and accessible by a computer, but is not limited thereto. Memory 1402 may be a combination of the above-described memories.
[0214] The processor 1401 may include one or more CPUs, graphics processing units (GPUs), or digital processing units, etc.
[0215] This application embodiment does not limit the specific connection medium between the memory 1402 and the processor 1401. In this application embodiment, the memory 1402 and the processor 1401 are connected via a bus 1403 in Figure 14. The bus 1403 is represented by a thick line in Figure 14, and the bus 1403 can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is used in Figure 14, but this does not mean that there is only one bus or one type of bus.
[0216] The memory 1402 stores program code, which, when executed by the processor 1401, causes the processor 1401 to perform the following:
[0217] Information is extracted from the digital signals of remote sensing images sent by the remote sensing detection subsystem to obtain link establishment reference data;
[0218] Based on the aforementioned link establishment reference data, the first angle adjustment device and the laser subsystem are controlled to adjust the link establishment angle.
[0219] In some alternative implementations, processor 1401 also performs:
[0220] The downlink remote sensing data is sent to the laser subsystem, which generates a second laser signal corresponding to the downlink remote sensing data and transmits the second laser signal to the first angle adjustment device, which then projects the second laser signal onto the ground.
[0221] In some alternative implementations, processor 1401 specifically performs:
[0222] Information is extracted from the digital signal of the remote sensing image to obtain first link-building reference data characterizing climate and second link-building reference data characterizing location;
[0223] Based on the first chain establishment reference data and the second chain establishment reference data, the first angle adjustment device and the second angle adjustment device in the laser subsystem are controlled to adjust the chain establishment angle.
[0224] In some alternative implementations, processor 1401 specifically performs:
[0225] Based on the first link establishment reference data, candidate devices are selected from the ground devices corresponding to the digital signals of the remote sensing images;
[0226] Select a target device from the candidate devices based on the second chain establishment reference data;
[0227] Based on the second link establishment reference data of the target device, determine the first link establishment angle corresponding to the first angle adjustment device and the second link establishment angle corresponding to the second angle adjustment device;
[0228] The first angle adjustment device is adjusted to establish a chain angle based on the first chain establishment angle; and the second angle adjustment device is adjusted to establish a chain angle based on the second chain establishment angle.
[0229] In some alternative implementations, processor 1401 specifically performs:
[0230] Based on the first link establishment reference data, candidate devices are selected from the ground devices corresponding to the digital signals of the remote sensing images;
[0231] Select a target device from the candidate devices based on the second chain establishment reference data;
[0232] The second link establishment reference data of the target device is sent to the satellite control platform, and the control platform determines the third link establishment angle corresponding to the first angle adjustment device and the fourth link establishment angle corresponding to the second angle adjustment device; the link establishment angle of the first angle adjustment device is adjusted based on the third link establishment angle; and the link establishment angle of the second angle adjustment device is adjusted based on the fourth link establishment angle.
[0233] This application provides a computer-readable storage medium storing a computer program thereon. When executed by a processor, the program implements the steps of the data processing method or the data transmission method described above. The readable storage medium can be a non-volatile readable storage medium.
[0234] The present application has been described above with reference to block diagrams and / or flowcharts illustrating methods, apparatus (systems), and / or computer program products according to embodiments of the present application. It should be understood that a block of a block diagram and / or flowchart, as well as combinations of blocks of block diagrams and / or flowcharts, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, and / or other programmable means to produce a machine, such that the instructions, executable via the computer processor and / or other programmable means, create methods for implementing the functions / actions specified in the blocks of the block diagrams and / or flowcharts.
[0235] Accordingly, this application can also be implemented using hardware and / or software (including firmware, resident software, microcode, etc.). Furthermore, this application can take the form of a computer program product on a computer-usable or computer-readable storage medium, having computer-usable or computer-readable program code implemented in the medium for use by or in conjunction with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium can be any medium that can contain, store, communicate, transmit, or deliver a program for use by or in conjunction with an instruction execution system, apparatus, or device.
[0236] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.
[0237] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.
Claims
1. A laser remote sensing integrated machine, characterized in that, include: The system includes a first angle adjustment device, a preprocessing device, a remote sensing subsystem, a laser subsystem, and a data processing device. The first angle adjustment device is used to project the remote sensing detection signal and the first laser signal onto the preprocessing device; The preprocessing device is used to transmit the first optical path corresponding to the remote sensing detection signal to the remote sensing detection subsystem; and to transmit the second optical path corresponding to the first laser signal to the laser subsystem; The remote sensing detection subsystem is used to convert the first optical path into a signal to obtain a remote sensing image digital signal, and send the remote sensing image digital signal to the data processing device. The data processing device is used to extract information from the digital signal of the remote sensing image to obtain link establishment reference data; and to control the first angle adjustment device and the laser subsystem to adjust the link establishment angle based on the link establishment reference data. The laser subsystem is used to restore the second optical path to the first laser signal and send the laser receiving data corresponding to the first laser signal to the data processing device; The data processing device is also used for: Send downlink remote sensing data to the laser subsystem; The laser subsystem is also used to generate a second laser signal corresponding to the downlink remote sensing data and transmit the second laser signal to the first angle adjustment device; The first angle adjustment device is also used to project the second laser signal onto the ground.
2. The laser remote sensing integrated machine according to claim 1, characterized in that, The preprocessing device includes a main optical system and a beam splitter. The main optical system is used to focus the remote sensing signal to obtain a first optical path; and to focus the first laser signal to obtain a second optical path; The beam splitter is used to transmit the first optical path to the remote sensing subsystem and the second optical path to the laser subsystem.
3. The laser remote sensing integrated machine according to claim 1, characterized in that, The laser subsystem includes a capture-track-alignment (ATP) subsystem and a laser communication device; The ATP subsystem is used to recover the second optical path into a first laser signal, capture and maintain the laser communication link based on the first laser signal, and send the first laser signal to the laser communication device. The laser communication device is used to modulate and demodulate the first laser signal to obtain the laser received data.
4. The laser remote sensing integrated machine according to claim 3, characterized in that, The data processing device is specifically used for: Information is extracted from the digital signal of the remote sensing image to obtain first link-building reference data characterizing climate and second link-building reference data characterizing location; Based on the first chain establishment reference data and the second chain establishment reference data, the first angle adjustment device and the second angle adjustment device in the ATP subsystem are controlled to adjust the chain establishment angle.
5. The laser remote sensing integrated machine according to claim 4, characterized in that, The data processing device is specifically used for: Based on the first link establishment reference data, candidate devices are selected from the ground devices corresponding to the digital signals of the remote sensing images; Select a target device from the candidate devices based on the second chain establishment reference data; Based on the second link establishment reference data of the target device, determine the first link establishment angle corresponding to the first angle adjustment device and the second link establishment angle corresponding to the second angle adjustment device; The first angle adjustment device is adjusted to establish a chain angle based on the first chain establishment angle; and the second angle adjustment device is adjusted to establish a chain angle based on the second chain establishment angle.
6. The laser remote sensing integrated machine according to claim 4, characterized in that, The data processing device is specifically used for: Based on the first link establishment reference data, candidate devices are selected from the ground devices corresponding to the digital signals of the remote sensing images; Select a target device from the candidate devices based on the second chain establishment reference data; The second link establishment reference data of the target device is sent to the satellite control platform, and the control platform determines the third link establishment angle corresponding to the first angle adjustment device and the fourth link establishment angle corresponding to the second angle adjustment device; the link establishment angle of the first angle adjustment device is adjusted based on the third link establishment angle; and the link establishment angle of the second angle adjustment device is adjusted based on the fourth link establishment angle.
7. The laser remote sensing integrated machine according to any one of claims 1 to 6, characterized in that, The data processing device includes some or all of the following: a laser-managed field-programmable gate array (FPGA), a remote sensing management FPGA, and an image processing chip.
8. A data transmission method, characterized in that, Data transmission is performed using the laser remote sensing integrated machine as described in any one of claims 1 to 7.
9. A data processing method, characterized in that, The data processing device applied in the laser remote sensing integrated machine as described in any one of claims 1 to 7 includes: Information is extracted from the digital signals of remote sensing images sent by the remote sensing detection subsystem to obtain link establishment reference data; Based on the aforementioned chain establishment reference data, the first angle adjustment device and the laser subsystem are controlled to adjust the chain establishment angle. Also includes: The downlink remote sensing data is sent to the laser subsystem, which generates a second laser signal corresponding to the downlink remote sensing data and transmits the second laser signal to the first angle adjustment device, which then projects the second laser signal onto the ground.
10. The method according to claim 9, characterized in that, Information is extracted from the digital signals of remote sensing images transmitted by the remote sensing subsystem to obtain link establishment reference data, including: Information is extracted from the digital signal of the remote sensing image to obtain first link-building reference data characterizing climate and second link-building reference data characterizing location; Based on the established link reference data, the first angle adjustment device and the laser subsystem are controlled to adjust the established link angle, including: Based on the first chain establishment reference data and the second chain establishment reference data, the first angle adjustment device and the second angle adjustment device in the laser subsystem are controlled to adjust the chain establishment angle.
11. The method according to claim 10, characterized in that, Based on the first link establishment reference data and the second link establishment reference data, the first angle adjustment device and the second angle adjustment device in the laser subsystem are controlled to adjust the link establishment angle, including: Based on the first link establishment reference data, candidate devices are selected from the ground devices corresponding to the digital signals of the remote sensing images; Select a target device from the candidate devices based on the second chain establishment reference data; Based on the second link establishment reference data of the target device, determine the first link establishment angle corresponding to the first angle adjustment device and the second link establishment angle corresponding to the second angle adjustment device; The first angle adjustment device is adjusted to establish a chain angle based on the first chain establishment angle; and the second angle adjustment device is adjusted to establish a chain angle based on the second chain establishment angle.
12. The method according to claim 10, characterized in that, Based on the first link establishment reference data and the second link establishment reference data, the first angle adjustment device and the second angle adjustment device in the laser subsystem are controlled to adjust the link establishment angle, including: Based on the first link establishment reference data, candidate devices are selected from the ground devices corresponding to the digital signals of the remote sensing images; Select a target device from the candidate devices based on the second chain establishment reference data; The second link establishment reference data of the target device is sent to the satellite control platform, and the control platform determines the third link establishment angle corresponding to the first angle adjustment device and the fourth link establishment angle corresponding to the second angle adjustment device; the link establishment angle of the first angle adjustment device is adjusted based on the third link establishment angle; and the link establishment angle of the second angle adjustment device is adjusted based on the fourth link establishment angle.