Implementation method of high-dynamic star sensor based on EMCCD and CMOS

Abstract

The invention provides an implementation method of a high-dynamic star sensor based on an EMCCD (Electronic Multiplying Charge Coupled Device) and a CMOS and relates to the technique of star sensors. According to the implementation method of the high-dynamic star sensor based on the EMCCD and the CMOS, the problems that an ICCD which is utilized for rapidly acquiring a star map is large in volume, short in service life and high in power consumption, or high resolution and high frame frequency cannot be met when the star map is acquired by virtue of the EMCCD, and integral accumulation in a two-dimensional manner cannot be realized by virtue of a TDI manner in the prior art are solved; by acquiring multiple low-magnitude star maps in a large visual field by virtue of a high-resolution and high-sensitivity CMOS detector, the number of stars in a star base provided by the star sensor is reduced; aiming at the problem that the image motion of the star map is fuzzy because the kinematic velocity under a high dynamic state is too large, high-magnitude images are rapidly photographed by virtue of multiplication modes of four EMCCDs at four corners of the CMOS, so that the probability for acquiring a motion vector is increased; a TDI working manner in the two-dimensional direction of the CMOS is achieved by virtue of software according to the acquired motion vector; the problem that the probability for acquiring the image motion by virtue of one EMCCD is too low is avoided.

Description

technical field [0001] The invention relates to a star sensor technology, in particular to a method for realizing a high-precision and high-dynamic star sensor based on EMCCD and CMOS. Background technique [0002] The star sensor is a high-precision attitude-sensitive measuring instrument, which has the advantages of high precision, strong anti-interference, and independent navigation without relying on other systems. Nowadays, domestic spacecraft mostly use imported foreign low-precision star sensors. With the deepening of aerospace applications, higher and higher requirements are put forward for their accuracy and dynamic performance. Due to the embargo of high-grade products abroad, they can only rely on their own Strength developed. The invention provides a combined high-dynamic star sensor imaging system based on high-resolution CMOS and low-resolution electronic multiplying charge-coupled device (EMCCD, Electronic Multiplying CCD). The basic working principle of the...

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Problems solved by technology

[0004] The present invention solves the problems of high-speed acquisition of star maps by ICCD in the prior art, such as large volume, short life, high power consumption, etc., or the problem that the star map cannot satisfy high resolution and high frame frequency at the same time by using EMCCD. At the same time, the existing TDI In order to solve problems such as two-dimensional accumulative integration cannot be realized by the traditional method, an implementation method of a high dynamic star sensor based on EMCCD and CMOS is provided

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