A large field of view star sensor based on bionic compound eyes

Abstract

The invention relates to a star sensor with a large field of view. In order to solve the problem that when the existing star sensor adopts a small field of view imaging system, it needs to be used in conjunction with a tracking platform. However, the existing design based on a similar compound eye structure also has system integration. To solve the problem of insufficient integration, a bionic compound eye-based star sensor with a large field of view is provided, which includes a spherical lens group unit, an optical conversion unit, and a data processing unit arranged in sequence along the optical path; the spherical lens group unit includes a supporting shell and multiple multiple lens groups are installed on the supporting shell and are set independently of each other, the incident surface is distributed on the spherical surface of the supporting shell, and the incident optical axis points to the center of the sphere where the front spherical surface of the supporting shell is located, forming a joint The field of view at a preset angle; the optical conversion unit includes a plurality of coaxially arranged lenses, and the optical axis passes through the center of the sphere where the front spherical surface of the supporting shell is located; the data processing unit is used to receive continuous plane images and convert them into discrete Digital image from which stellar centroid points are extracted.

Description

technical field

[0001] The invention relates to a star sensor with a large field of view, in particular to a star sensor with a large field of view based on a bionic compound eye. Background technique

[0002] The star sensor is a device that observes the position of the star and uses it as a reference coordinate system to calculate the position information of different stars and its own space attitude. Its working principle is that after capturing star images in real time, the position of the center of mass of the star is obtained through processing algorithms, and then combined with the navigation star map to estimate its own position and attitude.

[0003] At present, the star sensor mainly uses a single or several imaging systems with a small field of view below 20° to observe a specific sky area. It needs to be used in conjunction with a tracking platform to keep the camera components tracking the observed stars. There are also some star sensors based on a similar comp...

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