Large-view-field star sensor based on bionic compound eyes

Abstract

The invention relates to a large-view-field star sensor, and provides a large-view-field star sensor based on bionic compound eyes in order to solve the problems that when an existing star sensor adopts a small-view-field imaging system, a tracking cradle head needs to be used in cooperation, and system integration and integration are insufficient due to the fact that an existing design based on asimilar compound eye structure is adopted. The star sensor comprises a spherical lens group unit, an optical conversion unit and a data processing unit which are sequentially arranged along an optical path; the spherical lens group unit comprises a support shell and a plurality of lens groups; the plurality of lens groups are installed on the support shell and are arranged independently, an incident surface is distributed on the spherical surface of the support shell, and the incident optical axis points to the sphere center of a sphere where the spherical surface at the front part of the support shell is located to form a view field with a preset angle; the optical conversion unit comprises a plurality of coaxially-arranged lenses, and an optical axis penetrates through the sphere centerof the sphere where the front spherical surface of the supporting shell is located; and the data processing unit is used for receiving the continuous plane images, converting the continuous plane images into discrete digital images and extracting fixed star centroid points from the discrete digital images.

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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