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Realization method of high-precision three-band color star sensor

A technology of a star sensor and an implementation method, applied in the field of star sensors, can solve the problems of large chromatic aberration, affecting the accuracy of the image centroid, affecting the matching accuracy, etc., and achieves the effect of reducing the number, avoiding the decrease of the centroid accuracy, and reducing the calculation speed.

Inactive Publication Date: 2017-01-11
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The present invention provides a high-precision three-dimensional system to solve the problem of using a single-chip CMOS to receive a color star map image in the prior art, which affects the accuracy of the image centroid; Realization Method of Spectral Color Star Sensor

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  • Realization method of high-precision three-band color star sensor

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specific Embodiment approach 1

[0012] Specific implementation mode 1. Combination figure 1 To illustrate this embodiment, after the stars in the sky are split by the optical system, three CMOS image sensors are used to receive star images of three spectral bands in the visible light range, and the star maps of the three spectral bands are sent to the image processor for processing. The relative ratio of the gray value of the three-spectral image of the extracted star and the position information of the center of mass are used for star identification, capture and tracking. Compared with the existing use of centroid position information for star recognition, capture and tracking, the number of matching stars can be reduced, the speed of recognition can be improved, and the requirement for the processing speed of the image processor on the star can be reduced.

[0013] 1. Determine the magnitude of the detected star, add the spectral information of the stars within the detectable magnitude range based on the s...

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Abstract

The realization method of the high-precision three-spectrum color star sensor relates to a star sensor technology, which solves the problem that the prior art uses a single chip CMOS to receive the color star map image, which affects the accuracy of the image centroid; and because the lens adopts the traditional star sensor lens , there is a large chromatic aberration, which affects the matching accuracy and other problems. The present invention uses a high-resolution and high-sensitivity CMOS detector to obtain a star map; for the traditional use of star angular distances for star matching that requires multiple stars, the spectral characteristics of stars are used for color matching. The identification of star maps reduces the number of observed stars in the field of view; in view of the low accuracy of the centroid of the three-color star maps obtained by using a single color CMOS chip, three CMOS sensors are used to obtain the three-color star maps respectively. The invention has the advantages of high precision, strong anti-interference, independent navigation without relying on other systems, and the like.

Description

technical field [0001] The invention relates to a star sensor technology, in particular to a method for realizing a high-precision three-band color star sensor. Background technique [0002] The basic working principle of the star sensor is that the starlight emitted by the star is imaged on the target surface of the detector by the optical system, and the imaging system takes an image whose boresight points to the starry sky, and processes the digitized star map through the signal processing circuit, mainly including stars Target detection (star extraction), star recognition, attitude calculation and other processes, finally determine the direction of the star sensor optical axis in the inertial space, and then use the known installation angle between the star sensor and the carrier and this point to complete the carrier three Measurement of the instantaneous attitude of the axis. [0003] The traditional star matching is based on the star angular distance. Ryerson Univers...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/02
CPCG01C21/02
Inventor 余达李杰李明晶刘金国郭永飞刘春香石俊霞
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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