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Double-view field star sensor and method for identifying star atlas using the same

A technology of star sensor and dual field of view, which is applied in the observation of aerospace vehicles, instruments, and optical devices, etc., can solve the problems of unbalanced three-axis accuracy, achieve simple steps, make up for the low accuracy of the roll axis, and identify clear logical effect

Active Publication Date: 2008-05-07
北京天银星际科技有限责任公司
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Problems solved by technology

[0022] The purpose of the present invention is to solve the unbalanced three-axis precision of existing star sensors, and overcome the shortage of simultaneous orthogonal installation and use of multiple star sensors

Method used

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  • Double-view field star sensor and method for identifying star atlas using the same
  • Double-view field star sensor and method for identifying star atlas using the same
  • Double-view field star sensor and method for identifying star atlas using the same

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Embodiment Construction

[0046] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0047] Ordinary star sensor imaging model such as figure 1 As shown, the star 1 is imaged on the photosensitive detector 4 through the star sensor lens system 2, and at this time the star image point 3 is obtained on the photosensitive detector. When the ordinary star sensor is in a certain attitude, the star image point and the star have a Correspondence.

[0048] 1. Dual-field-of-view implementation method and imaging principle of the dual-field-of-view star sensor

[0049] Such as figure 2 Shown, the present invention has designed a kind of dual field of view star sensor, comprises two shading hoods 5 that the central axis is perpendicular to each other, and one is installed in front of the lens system of common star sensor and becomes 45 ° half with the main optical axis of lens system Anti-semi-transparent plane mirror 6, star sensor lens system 2, photosens...

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Abstract

The double-view field star sensing detector and its star chart distinguishing method belongs to the field of posture sensor technology. The double-view field star sensing detector has one semi-transparent mirror in angle of 45 deg to the main optical axle installed before the lens system of common star sensing detector, and two lens hoods in the two incident light directions of the semi-transparent mirror to avoid spatial stray light interference. The light rays of the two view fields are transmitted and reflected separately in the semi-transparent mirror, passed through the same lens system and imaged in the same photosensitive detector. Compared with common single view field star sensing detector, the double-view field star sensing detector has higher precision, high chip utilization, small volume, low power consumption, easy installation and use, and other features. In addition, the corresponding star chart distinguishing method is also disclosed.

Description

technical field [0001] The invention belongs to the technical field of attitude sensors. Background technique [0002] The star sensor is a high-precision device for attitude measurement on a spacecraft. It is now widely used in the aerospace field, including space shuttles, earth satellites, or deep space probes such as the moon and Mars. [0003] In recent years, with the requirements of space missions, the requirements for satellite attitude have become higher and higher, especially for systems that require high-precision imaging, including reconnaissance, resource and astronomical observation satellites. -5 rad level, which is an accuracy level that other sensors such as sun sensors, moon sensors and magnetometers cannot achieve. Only star sensors can provide such precision. [0004] The star sensor can basically be regarded as an essential system on modern high-precision satellites, but this kind of high-precision star sensor generally has a shortcoming that the accur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00G01D5/26B64G3/00G01B11/03
Inventor 尤政邢飞董瑛
Owner 北京天银星际科技有限责任公司
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