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A Method of Improving Data Update Rate of Star Sensor

A star sensor and data update technology, applied to instruments, measuring devices, surveying and navigation, etc., can solve the problems of long time consumption, unfavorable high data update rate of star sensors, etc., and achieve the effect of improving the update rate

Active Publication Date: 2017-05-10
BEIJING INST OF CONTROL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the star tracking mode of these star sensors, although only the image data within the tracking window is processed, since the sensitive chip needs to expose and read all the image data, it takes a long time, which is not conducive to the high data update rate of the star sensor. realization of

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  • A Method of Improving Data Update Rate of Star Sensor
  • A Method of Improving Data Update Rate of Star Sensor
  • A Method of Improving Data Update Rate of Star Sensor

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Embodiment Construction

[0022] The invention has been applied to a domestic small star sensor, such as figure 1 As shown, the specific implementation steps are as follows:

[0023] 1) After the star sensor gets a new frame of tracking mode star map data, use the index number ID in the new frame of tracking mode star map data to search in the historical window information database; use the new frame of tracking mode star map The window information that the data ID matches, after completing the star point extraction, matching recognition and attitude calculation, the attitude data of the current frame is obtained, and the attitude data of the current frame and the previous frame are used to predict the coarse attitude of the star sensor at the next moment; The window information includes window coordinates and corresponding navigation asterisks;

[0024] 2) According to the rough attitude predicted in step 1) and the size of the field of view of the star sensor, extract the navigation stars in the fie...

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Abstract

The invention discloses a method for increasing the data updating rate of a star sensor. The method comprises steps as follows: firstly, after the star sensor predicts the next-frame tracking window image surface position, according to window sizes and read data size limitations, an optimal exposure and read line is further determined, and line information is output; when a logic device of the star sensor controls exposure and reading of a sensitive chip, corresponding line image data are exposed and read only according to information input, and the data are stored according to windows; when software and the logic device of the star sensor perform line information and image data interaction, information correspondence is realized with a loop index method. According to the method, strict data correspondence of a three-stage assembly line of image exposure, image data storage and software computation is guaranteed with the loop index method.

Description

technical field [0001] This patent belongs to the field of star sensors for space vehicles, and relates to a method for realizing high data update rate of star sensors. Background technique [0002] The star sensor is an imaging space attitude measurement sensor. By extracting, identifying and calculating the star points of the captured star map, the three-axis attitude information of the star sensor is output. Due to its high precision and high reliability, it can , are widely used in various spacecraft such as satellites and spaceships. The data update rate is an important indicator of the star sensor, especially the star map sampling and attitude output frequency when the star sensor is working normally (star tracking mode). [0003] The existing star sensors using rolling shutter sensitive chips, such as the AstroAPS of Jena Company in Germany, generally have a data update rate of about 10 Hz. In the star tracking mode of these star sensors, although only the image dat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/02
CPCG01C21/025
Inventor 王龙杨孟飞钟红军卢欣杨君郑璇
Owner BEIJING INST OF CONTROL ENG