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LFOV (large field-of-view) star-measuring sensor capable of inhibiting atmospheric turbulence effect in daytime and use method

A technology of atmospheric turbulence and star sensors, applied in the field of celestial navigation, can solve problems such as the deterioration of the signal-to-noise ratio of celestial navigation systems

Active Publication Date: 2017-03-08
中船星惯科技(武汉)有限公司
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Problems solved by technology

[0007] The background light during the day is affected by the effect of atmospheric turbulence, and the image of the star measurement shows gray fluctuations with time and space. The random fluctuation of the image gray is much larger than the measured star target when it is severe. The gray scale makes the signal-to-noise ratio of the astronomical navigation system seriously deteriorate when measuring stars during the day

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  • LFOV (large field-of-view) star-measuring sensor capable of inhibiting atmospheric turbulence effect in daytime and use method
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  • LFOV (large field-of-view) star-measuring sensor capable of inhibiting atmospheric turbulence effect in daytime and use method

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Embodiment Construction

[0041] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0042] refer to figure 1 As shown, the present invention discloses a large-field-of-view star sensor that suppresses the effect of daytime atmospheric turbulence. The sensor includes: a split-spectrum dual-light path optical system, image detection and preprocessing components, and a differential image processing calibration method and algorithm unit, wherein The split-spectrum dual-path optical system splits the incident light, divides it into two paths for narrow-band spectral filtering, and then sends it to the image detection and preprocessing component, which is used to convert the two paths of light signals into digital image signals and combine the differential images Processing and calibration methods and algorithms, a series of operations such as dual-detector collaborative processing, dual-optical image pixel alignment calibration, and differential ...

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Abstract

The invention discloses an LFOV (large field-of-view) star-measuring sensor capable of inhibiting atmospheric turbulence effect in daytime. The sensor comprises a spectrum-splitting double-light-path optical system, an image detection and preprocessing assembly and a difference image processing calibration method and algorithm unit, wherein the spectrum-splitting double-light-path optical system comprises a light shield, an optical lens, a beam splitter prism and a structure framework; the image detection and preprocessing assembly comprises a near infrared detector and a signal acquisition and processing circuit; the difference image processing calibration method and algorithm unit comprises a double-detector coprocessing module, a double-light-path image pixel aligning calibrating module, a difference image grey matching module and an image difference algorithm module. The invention discloses a use method of the LFOV star-measuring sensor. Compared with an existing single-light-path LFOV star-measuring sensor taking a conventional CCD as a detector, the LFOV star-measuring sensor can be applied on a carrier in the atmospheric layer, realizes LFOV multi-star measuring of near-infrared stars in the sunny daytime and can be widely applied to the sailing and aviation celestial navigation field.

Description

technical field [0001] The invention belongs to the field of astronomical navigation, and in particular relates to a daytime large-field-of-view star-measuring sensor applied to an astronomical navigation system, and a usage method thereof. Background technique [0002] Celestial navigation is a navigation technology for carrier positioning and orientation by measuring celestial bodies. It has many advantages such as high measurement accuracy, no interference, no time drift, and high reliability. It has become an indispensable equipment in an integrated navigation system. Astronomical navigation equipment can be divided into large field of view multi-satellite vector star survey navigation system and small field of view single star survey navigation system. [0003] Because the traditional large-field-of-view satellite navigation system using CCD as the sensor is extremely susceptible to being saturated by strong background light during the day, it is difficult to work all d...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/02
CPCG01C21/02
Inventor 彭煜宣扬李奇王熙宁朱生国尹业宏
Owner 中船星惯科技(武汉)有限公司
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