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Combined imaging and driving method of star sensor

A star sensor and combined imaging technology, which is applied in instruments, measuring devices, surveying and navigation, etc., can solve the problems of poor adaptability of detectors, poor processing results, fine window acquisition, etc., and achieve continuous adjustable exposure time, The effect of short time and improved dynamic performance

Active Publication Date: 2018-11-16
SHANGHAI AEROSPACE CONTROL TECH INST
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AI Technical Summary

Problems solved by technology

[0003] Generally, full-frame drive is the simplest image acquisition method, the control strategy is relatively simple, and the processing result is not as fine as window acquisition
The existing window acquisition driving method, or based on the window starting coordinates, the design strategy is not the same, the adaptability of the detector is not good

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  • Combined imaging and driving method of star sensor
  • Combined imaging and driving method of star sensor
  • Combined imaging and driving method of star sensor

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Embodiment Construction

[0023] based on the following Figure 1 ~ Figure 3 , specifically explain the preferred embodiment of the present invention.

[0024] Such as figure 1 As shown, the present invention provides a combined imaging driving method of a star sensor, comprising the following steps:

[0025] Step S1, the CPU module in the star sensor generates a tracking star window image acquisition control word (abbreviated as "window control word") according to the predicted star point coordinates and stores it in the window control memory;

[0026] Described window control word comprises 512 words, and each word is 8 bytes (8bit), and window control word is all stored in the window control memory, and promptly the size of window control memory is 512 * 8bit, each of window control word The word occupies an address in the window control memory; the first address in the window control memory stores the drive control word, the highest bit of the drive control word is valid, if the highest bit is 1,...

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Abstract

A combined imaging and driving method of a star sensor comprises the steps that window control words are generated and include driving control words and block control words, the block control words include row block control words and column block control words, the driving control words are used for representing an adopted full-frame driving mode or a window driving mode, the row block control words represent a row area of the position where a window is located, the column block control words represent a column area of the position where the window is located, window control words of a windowcontrol memory are read to judge a required driving mode, if the driving mode is the full-frame driving mode, all pixels are read row by row and one by one to obtain full-frame images, if the mode isa window driving mode, integral charge resetting is conducted on a detector, then exposure accumulation is performed, and finally window images are acquired according to the block control words in thewindow control words. The star point extracting capability is effectively improved, the posture effectiveness of the star sensor is guaranteed, computing quantity is decreased, a frame period is shortened, the data updating rate of the star sensor is improved, occupancy of resources is saved, and the dynamic performance of the star sensor is improved.

Description

technical field [0001] The invention relates to a combined imaging driving method of a star sensor. Background technique [0002] The star sensor is currently the most accurate attitude sensor equipped with satellites. It is an optical sensitive device that needs to image the starry sky. Its imaging component is a photodetector, which is its main information input unit. The detector is controlled by the driving signal to output a star map, which provides the basis for a series of work such as subsequent star map processing, star point extraction, and attitude calculation. The image preprocessing of the star sensor is one of the keys to the operation of the star sensor. Generally, in order to improve the effect of star map processing, after the star sensor enters the star tracking state, the detector driving strategy is adjusted to only output the star map of the designated area. This requires that the driver of the detector needs to have a combined mode of full-frame image...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/02
CPCG01C21/025
Inventor 余路伟周琦毛晓楠金荷刘轩沈艳萍李新鹏高原叶宋杭
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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