CN111536991A - Remote sensing satellite multi-mode imaging load simulation device - Google Patents
Remote sensing satellite multi-mode imaging load simulation device Download PDFInfo
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Abstract
A remote sensing satellite multi-mode imaging load simulation device belongs to the field of remote sensing satellite ground testing. The invention aims to solve the problem that the image processing capability of the existing onboard image processing load cannot be verified. The system comprises an imaging load control command analysis unit, a data processing unit and a data processing unit, wherein the imaging load control command analysis unit is used for receiving time synchronization information of a remote sensing satellite borne computer and generating a simulated remote sensing image and a data control command according to a camera control command of the remote sensing satellite borne computer; the data interaction unit transmits the simulated remote sensing image and the data control instruction to the simulated remote sensing image transmission unit; the analog remote sensing image transmission unit obtains a sending image data counting value, an image loading rate and a satellite interface time sequence clock number, and sends an image to a corresponding remote sensing satellite image processing load according to the image loading rate; and determining a simulated remote sensing image to finish the loading of the satellite through the image data counting value. The invention can fully verify the processing capability of the onboard image processing load on the image formed by the novel remote sensing imaging load.
Description
Technical Field
The invention relates to a remote sensing satellite multi-mode imaging load simulation device, and belongs to the field of ground testing of remote sensing satellites.
Background
Remote sensing satellites play an important role in the fields of natural exploration, disaster prevention and control, national defense and the like. The realization of the remote sensing satellite function depends on the remote sensing imaging load, the data processor, the link manager, the satellite multiplexer and other effective loads, and the delivery time of the effective loads is usually far lagged behind other satellite systems due to the great research and development technical difficulty, so that the time of the satellite assembly ground test is seriously increased.
The remote sensing satellite load data loading equipment is used for simulating data output of each effective load of a remote sensing satellite and loading the data output to the satellite in the ground test process of the remote sensing satellite so as to realize comprehensive test of the satellite load and the platform. The load data loading equipment has important significance for shortening the satellite ground test period and accelerating the satellite model development task.
In the ground test stage, the remote sensing satellite imaging load cannot shoot a space remote sensing image on the spot, and the function test of the on-satellite image processing load is usually realized by loading remote sensing image data samples shot by other satellites in a database. With the development of remote sensing imaging technology, the imaging load of the remote sensing image has the function of multi-mode imaging, and the remote sensing images with different widths and widths can be shot at different imaging angles and different imaging frame frequencies according to a specified ground observation area. Because the remote sensing image data samples in the database are limited and cannot be completely matched with images shot by the remote sensing multi-mode imaging load, the processing capability of the on-satellite image processing load on the images formed by the remote sensing multi-mode imaging load cannot be fully verified; in addition, the adaptability of the mathematical-type loads of images on the satellite when the imaging load mode is switched cannot be verified sufficiently. Therefore, a simulation device capable of sufficiently simulating a remote sensing image captured by a remote sensing satellite multi-mode imaging load is urgently needed.
Disclosure of Invention
The invention provides a remote sensing satellite multi-mode imaging load simulation device, aiming at the problem that the function test of the existing onboard image processing load is carried out by loading remote sensing image data in a database, and the image processing capability of the existing onboard image processing load on the remote sensing multi-mode imaging load cannot be verified.
The invention discloses a remote sensing satellite multi-mode imaging load simulation device, which comprises:
the imaging load control command analysis unit 100 is used for receiving time synchronization information of the remote sensing satellite onboard computer and generating a simulated remote sensing image and a data control command according to a camera control command of the remote sensing satellite onboard computer;
the data interaction unit 200 is used for transmitting the simulated remote sensing image and the data control instruction to the simulated remote sensing image transmission unit 300;
the simulated remote sensing image transmission unit 300 is used for obtaining a sending image data counting value, an image loading rate and a satellite interface time sequence clock number based on the simulated remote sensing image and the data control instruction, and sending the simulated remote sensing image to a corresponding remote sensing satellite image processing load according to the image loading rate by using the satellite interface time sequence clock number; and simultaneously, determining a simulated remote sensing image to finish the loading of the satellite through an image data counting value.
According to the remote sensing satellite multi-mode imaging load simulation device, the imaging load control command analysis unit 100 comprises:
the time synchronization module 110 is used for receiving time synchronization information of the satellite-borne computer of the remote sensing satellite and carrying out time synchronization on the simulation device and the remote sensing satellite;
the control instruction analysis module 120 is used for receiving a camera control instruction of the remote sensing satellite onboard computer and analyzing to obtain an imaging coordinate, an imaging angle, an imaging breadth and an imaging frame frequency;
the remote sensing image database 130 is used for extracting remote sensing image samples of corresponding areas according to the imaging coordinates;
the image angle transformation module 140 is used for performing angle transformation on the remote sensing image sample according to the imaging angle to obtain a quasi-simulated remote sensing image under the corresponding imaging angle;
the image breadth cutting module 150 is used for cutting the breadth of the simulated remote sensing image according to the imaging breadth to obtain the simulated remote sensing image;
a protocol parameter conversion module 160, configured to convert the imaging frame rate into a satellite interface timing clock number; simultaneously converting the imaging format into a sending image data counting value;
the analysis image caching module 170 is configured to cache the analog remote sensing image in a ping-pong caching manner, cache an odd frame image in an odd frame cache region, and cache an even frame image in an even frame cache region;
and the control instruction generating module 180 is configured to obtain a data control instruction according to the clock number of the satellite interface timing sequence and the count value of the sent image data.
According to the remote sensing satellite multi-mode imaging load simulation device, the data control instruction comprises a loading rate switching instruction, an image data counting change instruction and a satellite interface time sequence clock number.
According to the remote sensing satellite multi-mode imaging load simulation device, the simulated remote sensing image transmission unit 300 comprises:
the received image caching module 310 is used for caching and receiving odd frame images of the analog remote sensing images through the odd frame receiving caching areas correspondingly, and the even frame receiving caching areas correspondingly cache and receive even frame images of the analog remote sensing images;
a control command module 320, configured to receive the data control command;
an image data extraction module 330, configured to extract the simulated remote sensing image by the received image caching module 310;
an image data count module 340, configured to update a sent image data count value according to the image data count change instruction output by the control instruction module 320;
a loading rate switching module 350, configured to transmit the image loading rate to the interface control module 360 according to the loading rate switching instruction output by the control instruction module 320;
the interface control module 360 is used for sending the simulated remote sensing images to corresponding remote sensing satellite image processing loads through corresponding data interfaces according to the image loading rate by using the satellite interface time sequence clock number; and determining to finish satellite-to-satellite loading of a simulated remote sensing image when the image data count value reaches a preset count value.
The invention has the beneficial effects that: the invention can simulate various imaging modes of a remote sensing satellite in a space environment, and accurately load the simulated remote sensing satellite image to the on-satellite image processing load in real time, so that the simulated remote sensing image loaded to the on-satellite image processing load is matched with the actual imaging condition of the remote sensing satellite multi-mode imaging load, thereby fully verifying the processing capacity of the on-satellite image processing load on the image formed by the novel remote sensing imaging load in satellite ground test; meanwhile, the adaptability of the onboard image processing load to the switching of the imaging load mode can be tested by changing the image loading rate.
The invention appoints the remote sensing image with frame frequency and breadth size under the appointed area and the appointed angle generated by simulating the remote sensing imaging load through the software part, and accurately loads the remote sensing image into the image processing load on the remote sensing satellite in real time through the appointed data interface at the hardware part, thereby realizing the comprehensive simulation of the remote sensing imaging load imaging in the ground test, and further fully verifying the processing capacity of the on-satellite image processing load and the adaptability to the imaging load mode switching. The time of satellite ground test is greatly shortened, and the flexibility and reliability of satellite test work are improved.
Drawings
FIG. 1 is a block diagram of an exemplary process for a remote sensing satellite multi-mode imaging load simulation apparatus according to the present invention;
fig. 2 is an exemplary flow diagram of a specific embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
In a first embodiment, as shown in fig. 1, the present invention provides a remote sensing satellite multi-mode imaging load simulation apparatus, including:
the imaging load control command analysis unit 100 is used for receiving time synchronization information of the remote sensing satellite onboard computer and generating a simulated remote sensing image and a data control command according to a camera control command of the remote sensing satellite onboard computer;
the data interaction unit 200 is used for transmitting the simulated remote sensing image and the data control instruction to the simulated remote sensing image transmission unit 300;
the simulated remote sensing image transmission unit 300 is used for obtaining a sending image data counting value, an image loading rate and a satellite interface time sequence clock number based on the simulated remote sensing image and the data control instruction, and sending the simulated remote sensing image to a corresponding remote sensing satellite image processing load according to the image loading rate by using the satellite interface time sequence clock number; and simultaneously, determining a simulated remote sensing image to finish the loading of the satellite through an image data counting value.
The present embodiment includes a software portion including an imaging load control command analysis unit 100 and a hardware portion, and the software portion mainly functions to transmit a simulated remote sensing image obtained in time synchronization with a remote sensing satellite to the hardware portion. The hardware part mainly comprises a simulated remote sensing image transmission unit 300 which has the main function of accurately loading the simulated remote sensing image generated by the software part into an image processing load on the remote sensing satellite in real time according to an imaging load output format.
Further, as shown in fig. 1, the imaging load control command parsing unit 100 includes:
the time synchronization module 110 is used for receiving time synchronization information of the satellite-borne computer of the remote sensing satellite and carrying out time synchronization on the simulation device and the remote sensing satellite;
the control instruction analysis module 120 is used for receiving a camera control instruction of the remote sensing satellite onboard computer and analyzing to obtain an imaging coordinate, an imaging angle, an imaging breadth and an imaging frame frequency; sending the data to a corresponding processing module;
the remote sensing image database 130 is used for extracting remote sensing image samples of corresponding areas in the database according to the imaging coordinates;
the image angle transformation module 140 is used for performing angle transformation on the remote sensing image sample according to the imaging angle to obtain a quasi-simulated remote sensing image under the corresponding imaging angle;
the image breadth cutting module 150 is used for cutting the breadth of the simulated remote sensing image according to the imaging breadth to obtain the simulated remote sensing image; the simulated remote sensing image data is obtained under the condition of a specified imaging area and an imaging angle and has a specified breadth;
a protocol parameter conversion module 160, configured to convert the imaging frame rate into a satellite interface timing clock number; simultaneously converting the imaging format into a sending image data counting value; the protocol parameter conversion module 160 can generate a plurality of control instructions which can be analyzed and executed by hardware parts on the basis of the satellite interface time sequence clock number and the sent image data count value;
the analysis image caching module 170 is configured to cache the analog remote sensing image in a ping-pong caching manner, cache an odd frame image in an odd frame cache region, and cache an even frame image in an even frame cache region; the analysis image caching module 170 is a software partial image caching module;
and the control instruction generating module 180 is configured to obtain a data control instruction according to the clock number of the satellite interface timing sequence and the count value of the sent image data.
By way of example, the data control instructions include a load rate switch instruction, an image data count change instruction, and a star interface timing clock count.
Still further, as shown in fig. 1, the simulated remote sensing image transmission unit 300 includes:
the received image caching module 310 is used for caching and receiving odd frame images of the analog remote sensing images through the odd frame receiving caching areas correspondingly, and the even frame receiving caching areas correspondingly cache and receive even frame images of the analog remote sensing images; the received image buffer module 310 is an image buffer module of a hardware part, and performs image transmission with a software part through the data interaction unit 200; the method comprises the steps of respectively storing images of odd frames and even frames in an analysis image caching module 170 into odd frame cache regions and even frame cache regions in each channel cache region according to data channels;
a control command module 320, configured to receive the data control command; sending the load rate switching instruction to the load rate switching module 350, and sending the image data count change instruction to the image data count module 340;
an image data extraction module 330, configured to extract the simulated remote sensing image by the received image caching module 310;
an image data count module 340, configured to update a sent image data count value according to the image data count change instruction output by the control instruction module 320;
a loading rate switching module 350, configured to transmit the image loading rate to the interface control module 360 according to the loading rate switching instruction output by the control instruction module 320;
the interface control module 360 is used for sending the simulated remote sensing images to corresponding remote sensing satellite image processing loads through corresponding data interfaces according to the image loading rate by using the satellite interface time sequence clock number; and meanwhile, reading the count value of the image data counting module 340, and determining to finish satellite-to-satellite loading of a simulated remote sensing image when the image data count value reaches a preset count value.
The specific embodiment is as follows:
the present invention will be described in detail with reference to fig. 2. The present invention is capable of other embodiments and its several details are capable of modifications in various obvious respects, all without departing from the spirit and scope of the present invention.
The remote sensing satellite multi-mode imaging load simulation device is divided into a software part and a hardware part. The software part is mounted on a Dell R730 high-performance server, imaging load control instructions and time synchronization information are received through a 1553B interface board card embedded in the server, and parallel operation of a time synchronization thread, a control command analysis thread, a frame frequency processing thread and an image processing thread is realized by adopting a parallel programming mode based on a C + + frame, so that the real-time performance of software processing is improved. The hardware part is based on a Kintex UltraScale FPGA core, and high-speed receiving and caching of image data and accurate and real-time loading of star image data are realized through customizing LVDS and TLK2711 data interface chips specified by a system-on-chip core.
The method comprises the following steps: satellite imaging load control command analysis and system time synchronization
The device receives a control command and a time synchronization command transmitted by a satellite through a 1553B board card, the control command enters a control command analysis thread, and an imaging coordinate, an imaging angle and an imaging frame frequency are analyzed from the satellite control command according to a predefined command analysis format; and the time synchronization command enters a time synchronization thread, and the device and the time of the remote sensing satellite are periodically synchronized by a time synchronization method based on time delay.
Step two: generation and caching of remote sensing imaging load image data in specified mode
And a remote sensing image database module in the image processing thread selects a remote sensing image sample of a designated area from the database according to the imaging coordinate, then obtains an equivalent remote sensing image under the designated angle by adopting an image geometric angle transformation method according to the imaging angle information, and then cuts the image according to the effect breadth information to obtain a simulated remote sensing image of the designated area and the designated angle and the designated breadth size. And storing the analog remote sensing image into a memory cache of the Dell R730 by dividing the analog remote sensing image into odd frames and even frames in a ping-pong cache mode.
Step three: pair star loading mode configuration
And the frame frequency processing thread generates protocol parameters corresponding to the counting and loading rate of the hardware control data according to the size of the imaging breadth and the imaging frame frequency information, and encapsulates the protocol parameters into a hardware control instruction set through a hardware control module.
Step four: software and hardware part data interaction and hardware operation parameter updating
And sending the simulated remote sensing image generated in the step two and the hardware control instruction set generated in the step three to a hardware part based on the Kintex UltraScale FPGA through the Ethernet. The data receiving is carried out through a TCP/IP protocol stack operated in the FPGA, wherein the analog remote sensing image data is divided into odd frames and even frames through a DDR4 controller, and the analog remote sensing image data is stored in each channel cache region which is divided in advance in a DDR4 memory according to a data channel; hardware control instruction set data enters the instruction analysis module through the AXI bus, analysis is carried out in the instruction analysis module, then data count values and loading rate value data are respectively sent to the data counting module and the loading rate switching module, the data counting module carries out data counting updating, and the loading rate switching module sends new loading rates to the interface control module.
Step four: loading and outputting star image data
For each data loading channel, the DDR4 controller extracts data from an odd frame buffer area or an even frame buffer area of a specified channel in the DDR4 memory, sends the data to the FIFO of the corresponding channel through the AXI bus, and triggers the interface control module to send the data once when the data in the FIFO meets the data sending length of one frame. The interface control module controls an LVDS interface chip or a TLK2711 interface chip of the channel to finish satellite-to-satellite loading of a frame of data at a specified loading rate, reads a numerical value in the counter and subtracts the sending data volume of the current frame, if the result is 0, the satellite-to-satellite loading of one image is considered to be finished, and if the result is not 0, the next triggering is waited.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (4)
1. A remote sensing satellite multi-mode imaging load simulation device is characterized by comprising:
the imaging load control command analysis unit (100) is used for receiving time synchronization information of the remote sensing satellite on-board computer and generating a simulated remote sensing image and a data control command according to a camera control command of the remote sensing satellite on-board computer;
the data interaction unit (200) is used for transmitting the simulated remote sensing image and the data control instruction to the simulated remote sensing image transmission unit (300);
the analog remote sensing image transmission unit (300) is used for obtaining a sending image data counting value, an image loading rate and a satellite interface time sequence clock number based on the analog remote sensing image and the data control instruction, and sending the analog remote sensing image to a corresponding remote sensing satellite image processing load according to the image loading rate by the satellite interface time sequence clock number; and simultaneously, determining a simulated remote sensing image to finish the loading of the satellite through an image data counting value.
2. The telemetry satellite multi-mode imaging load simulation device of claim 1,
the imaging load control command parsing unit (100) includes:
the time synchronization module (110) is used for receiving time synchronization information of the satellite-borne computer of the remote sensing satellite and carrying out time synchronization on the simulation device and the remote sensing satellite;
the control instruction analysis module (120) is used for receiving a camera control instruction of the remote sensing satellite onboard computer and analyzing to obtain an imaging coordinate, an imaging angle, an imaging breadth and an imaging frame frequency;
the remote sensing image database (130) is used for extracting remote sensing image samples of the corresponding area according to the imaging coordinates;
the image angle transformation module (140) is used for carrying out angle transformation on the remote sensing image sample according to the imaging angle to obtain a quasi-simulation remote sensing image under the corresponding imaging angle;
the image breadth cutting module (150) is used for cutting the breadth of the simulated remote sensing image according to the imaging breadth to obtain the simulated remote sensing image;
a protocol parameter conversion module (160) for converting the imaging frame rate to a satellite interface timing clock number; simultaneously converting the imaging format into a sending image data counting value;
the analysis image caching module (170) is used for caching the simulation remote sensing image in a ping-pong caching mode, caching the odd frame image to an odd frame cache region, and caching the even frame image to an even frame cache region;
and the control instruction generation module (180) is used for obtaining a data control instruction according to the time sequence clock number of the satellite interface and the sending image data count value.
3. The telemetry satellite multi-mode imaging load simulation device of claim 2,
the data control instruction comprises a loading rate switching instruction, an image data count changing instruction and a satellite interface time sequence clock number.
4. The telemetry satellite multi-mode imaging load simulation device of claim 3,
the simulated remote sensing image transmission unit (300) comprises:
the received image caching module (310) is used for caching and receiving odd frame images of the analog remote sensing images through the odd frame receiving caching area, and the even frame receiving caching area caches and receives even frame images of the analog remote sensing images;
a control instruction module (320) for receiving the data control instruction;
an image data extraction module (330) for extracting the simulated remote sensing image by the received image cache module (310);
the image data counting module (340) is used for updating the image data counting value according to the image data counting change instruction output by the control instruction module (320);
a loading rate switching module (350) for transmitting the image loading rate to the interface control module (360) according to the loading rate switching instruction output by the control instruction module (320);
the interface control module (360) is used for sending the simulated remote sensing images to corresponding remote sensing satellite image processing loads through corresponding data interfaces according to the image loading rate by the satellite interface time sequence clock number; and determining to finish satellite-to-satellite loading of a simulated remote sensing image when the image data count value reaches a preset count value.
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| CN112866574A (en) * | 2021-01-14 | 2021-05-28 | 中国科学院软件研究所 | Reconfigurable array imaging method and device for software-defined satellite |
| CN112866574B (en) * | 2021-01-14 | 2022-12-23 | 中国科学院软件研究所 | Reconfigurable array imaging method and device for software-defined satellite |
| CN113163146A (en) * | 2021-03-26 | 2021-07-23 | 上海卫星工程研究所 | Satellite image data simulation source and interface framework construction method and system |
| CN114509063A (en) * | 2022-01-17 | 2022-05-17 | 上海卫星工程研究所 | Multi-satellite combined test method and system for multi-satellite distributed information fusion system |
| CN114509063B (en) * | 2022-01-17 | 2024-01-30 | 上海卫星工程研究所 | Multi-star joint test method and system for multi-star distributed information fusion system |
| CN114546282A (en) * | 2022-02-25 | 2022-05-27 | 上海航天电子通讯设备研究所 | Solid-state memory for deep space exploration and storage and reading methods |
| CN114911182A (en) * | 2022-05-25 | 2022-08-16 | 中国科学院空间应用工程与技术中心 | Space application load controller |
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