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Autonomous positioning method based on observation of moonlight atmospheric polarization mode

An atmospheric polarization mode, autonomous positioning technology, applied in astronomical navigation, navigation calculation tools and other directions, to achieve the effect of improving all-day performance, improving autonomy and anti-interference, and improving autonomous positioning capabilities

Active Publication Date: 2020-08-28
BEIHANG UNIV
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Problems solved by technology

[0005] The problem to be solved by the present invention is: to overcome the defect that the existing polarization positioning technology can only realize carrier positioning based on the atmospheric polarization mode of sunlight in the daytime, and cannot work all day

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  • Autonomous positioning method based on observation of moonlight atmospheric polarization mode
  • Autonomous positioning method based on observation of moonlight atmospheric polarization mode
  • Autonomous positioning method based on observation of moonlight atmospheric polarization mode

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Embodiment Construction

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] Such as figure 1 Shown, the concrete realization steps of the present invention are as follows:

[0033] (1) Obtain the moonlight polarization degree d of multiple groups of nighttime sky observation points through the moonlight atmospheric polarization sensor i and polarization azimuth i=1,2,...,n, n is the total number of sky observation points that the sensor can measure, and then set the polarization threshold d according to the mean va...

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Abstract

The invention relates to an autonomous positioning method based on observation of a moonlight atmospheric polarization mode, and the method comprises the following steps: firstly obtaining the polarization degree and polarization azimuth angle information of night sky and moonlight through a moonlight atmospheric polarization sensor; secondly, determining a polarization degree threshold value according to the mean value of the moonlight polarization degree of each point in the sky, and screening out sky observation points which can be used for calculation; solving a moon elevation angle at thecurrent moment by utilizing the polarization degree and the polarization azimuth angle of the sky moon at night; and finally, calculating the position of the carrier by using two moon elevation angles at a fixed time interval. The method has night autonomous positioning capability, and enhances the all-time working capability of the polarization positioning technology.

Description

technical field [0001] The invention relates to an autonomous positioning method based on observing the atmospheric polarization mode of moonlight, which can realize autonomous positioning by using the moonlight polarization information in the nighttime environment. The invention does not rely on satellite signals and other electromagnetic signals, is a passive autonomous positioning method, and can be applied to ground robots, drones, ships and other carriers to improve their autonomous positioning capabilities in nighttime environments. Background technique [0002] Positioning the carrier is the basis for realizing navigation. At present, satellite navigation is the most widely used carrier positioning technology, which can obtain the absolute position of the carrier and provide accurate carrier latitude and longitude information and altitude information, etc., but it is extremely vulnerable to electromagnetic interference and cause the satellite signal to lose lock, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/02G01C21/20
CPCG01C21/02G01C21/20
Inventor 郭雷李浩天杨健乔建忠
Owner BEIHANG UNIV
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