Rapid retrieval method for satellite-borne solid-state memory

A solid-state memory and satellite-borne technology, which is applied in the field of measurement and testing, can solve the problem that storage devices cannot retrieve effective satellite information flexibly and efficiently, and achieve the effects of reducing requirements, reducing power consumption, and reducing data volume

Pending Publication Date: 2022-04-12
BEIJING RES INST OF TELEMETRY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that existing satellite and space vehicle storage devices cannot retrieve effective satellite information flexibly and efficiently, and provides a fast retrieval method for on-board solid-state storage. The internal logic of the software is activated by external instructions, and the image information is processed according to the contents of the instructions. Retrieve to solve the problem that the storage device cannot retrieve effective satellite information flexibly and efficiently

Method used

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  • Rapid retrieval method for satellite-borne solid-state memory
  • Rapid retrieval method for satellite-borne solid-state memory
  • Rapid retrieval method for satellite-borne solid-state memory

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown, a fast retrieval method of an on-board solid-state memory comprises the following steps:

[0043] S1. After the on-board solid-state memory is powered on, the software logic enters the idle state after initialization and waits to receive external commands;

[0044]S2. After receiving the retrieval and playback instruction from the outside, judge whether the retrieved image file exists; if yes, proceed to step S3; if not, proceed to step S8;

[0045] S3. Send the index address to the FPGA, and receive the index information returned by the FPGA;

[0046] S4. Judging whether the image information range of the summary index information in the index information overlaps with the retrieval range of the retrieval playback command, if yes, then retain the index address, if not, then do not retain the index address; return to step S3 until all indexes The addresses are all retrieved once, and enter step S5;

[0047] S5, judge whether there is the in...

Embodiment 2

[0057] Such as image 3 As shown, a fast retrieval method for on-board solid-state memory, the specific implementation process is as follows:

[0058] Taking receiving a search and playback instruction as an example, the specific implementation of the present invention will be further introduced.

[0059] (1) After the memory solid-state machine is powered on, the software logic enters the idle state after initialization and waits to receive external instructions.

[0060] (2) After receiving the search and playback command from the outside, it is judged whether the retrieved image file exists. If the file does not exist, go directly to step 6; if the file exists, it is ready to be retrieved as required, and go to step 3.

[0061] (3) Send the index address to the FPGA to obtain the image-related information stored in the address, judge the summary information in the received index information, and keep the index if the image information range in the summary information over...

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Abstract

The invention provides a quick retrieval method for a satellite-borne solid-state memory, which is characterized in that internal logic of software is started through an external instruction, image information is retrieved according to the content of the instruction to solve the problem that a storage device cannot flexibly and efficiently retrieve effective satellite information, and index information comprises summary index information and detailed index information. By the adoption of the method, the storage device can flexibly retrieve image information of various cameras and different strips in an on-orbit mode, and the storage device can adapt to the new mode requirement of multi-type load data management of satellites and spacecrafts. According to the method, required effective information can be quickly and accurately retrieved, the transmitted data volume is reduced, the requirement on data transmission is objectively reduced, and technical support can be provided for disaster emergency and the like, so that the method gradually develops towards a storage service center of satellite and spacecraft data. And meanwhile, the storage equipment becomes an indispensable key data support platform in space science tests and surveying and mapping remote sensing satellites.

Description

technical field [0001] The invention relates to the technical field of measurement and testing, in particular to a fast retrieval method for an on-board solid-state memory. Background technique [0002] With the continuous development of the satellite platform and remote sensing technology, the data storage technology of the spaceborne platform is also continuously improved, and the spaceborne data has shown the characteristics of a wide variety and different data forms. The increase of spaceborne data has also brought new challenges to data transmission. Although my country has basically built a satellite relay network with global coverage, the bandwidth of the network is limited, and it is difficult to realize the complete downlink of observation data. Direct transmission to the ground is affected by satellite transit time and transmission rate, which makes the amount of downlink data limited. In practical applications, not all data are meaningful, and often only image in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/22G06F16/2453H04B7/185G06F12/02
Inventor 韩冰冰胡萍薛小龙马宏业
Owner BEIJING RES INST OF TELEMETRY
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