Star sensor

Abstract

The invention belongs to deep-space navigation sensor design field, and specifically discloses a star sensor. By a bearing plate arranged between a lens and a circuit box, adetection circuit board is connected with the afterbody of the lens and is fixed in the circuit box after passing through the bearing plate, so that the structure can play a role in protecting the lens. Because of the perforated structure, the bearing plate has a lighter weight. The detector assembly is directly installed on the lens focal plane structure, thereby assuring the focusing precision not to be influenced by the deformation of the bearing plate and the circuit box and assuring the sensor precision level.

Description

technical field [0001] The invention belongs to the field of deep space navigation sensor design, and in particular relates to an autonomous navigation star sensor. Background technique [0002] In the field of aerospace technology, the star sensor is a kind of optical sensor that determines the attitude of the spacecraft by measuring the angular position of the star in the inertial space by imaging. Stellar sensors are generally composed of optical systems, structures, detector electronic circuits, data processor electronic circuits, stray light elimination components, external interfaces, star map recognition and attitude processing software, etc. Among them, the structural system is the support of the star sensor, and its structure determines the mechanical properties and volume weight of the sensor. [0003] The imaging structure of the general optical system is transmissive, which is composed of multiple lens parts assembled together, such as the SED series star sensor...

AI Technical Summary

Problems solved by technology

A common problem with the structure of this type of star sensor is: 1. Too many aspheric surfaces are used or are too complicated, which is not easy to process and adjust; 2. The lens is used as the main body of the structure, the mounting surface is on the lens structure, and the circuit box is attached to the lens First, in order to ensure the mechanical conditions, the design must be strengthened, resulting in a larger overall structural size and weight; 3. The mounting surface on the lens will cause stress and deformation to the structure of the lens, resulting in a decrease in imaging quality

4. The detector circuit board and the lens are installed separately. When the temperature of the space environment changes, it will cause defocus and other effects that affect the accuracy.

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