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Implementation method of high-accuracy three-spectrum colorful star sensor

A technology of star sensor and implementation method, which is applied in the field of star sensors, can solve problems affecting matching accuracy, large color difference, and image centroid accuracy, etc., achieve the requirements of reducing quantity, reducing calculation speed, and avoiding the effect of centroid accuracy decline

Inactive Publication Date: 2014-11-19
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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  • Implementation method of high-accuracy three-spectrum colorful 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 invention discloses an implementation method of a high-accuracy three-spectrum colorful star sensor, relates to a star sensor technology and aims at solving the problems in the prior art that when a single-chip CMOS is used for receiving an image of a colorful star map, the image mass center accuracy is influenced, with a conventional star sensor lens, a great color difference is generated and matching accuracy is influenced, etc. Through the implementation method of the high-accuracy three-spectrum colorful star sensor, a star map is obtained by a high-resolution and high-sensitivity CMOS detector; based on the fact that multiple stars are needed for star matching performed with a star angular distance in the prior art, spectral characteristics of fixed stars are used for identifying the colorful star map so as to reduce the number of stars observed in the field of view; aiming at solving the problem of low mass center accuracy of a three-color star map obtained by a single colorful CMOS chip, three CMOS sensors are respectively used for obtaining the three-color star map. The implementation method of the high-accuracy three-spectrum colorful star sensor has the advantages of being high in accuracy, high in anti-interference performance, capable of independently navigating by being independent of other systems, etc.

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 Applications(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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