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A Sun Vector Calculation Method Based on Underwater Polarization Distribution Mode

A sun vector and distribution mode technology, applied in the direction of measuring devices, measuring angles, instruments, etc., can solve the problems that the underwater polarization distribution does not fully conform to the single Rayleigh scattering model, is not applicable, and has not been considered

Active Publication Date: 2021-09-14
BEIHANG UNIV
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Problems solved by technology

In the above-mentioned patents, the calculation of the sun vector is based on the model established only by the atmospheric scattering, without considering the change of the direction of the polarization E-vector by the refraction of the water body, so the underwater polarization distribution does not fully conform to the single Rayleigh scattering model , so the above-mentioned patented method is not suitable for solving the solar vector based on the underwater polarization distribution

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  • A Sun Vector Calculation Method Based on Underwater Polarization Distribution Mode
  • A Sun Vector Calculation Method Based on Underwater Polarization Distribution Mode
  • A Sun Vector Calculation Method Based on Underwater Polarization Distribution Mode

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Embodiment Construction

[0051] 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.

[0052] According to an embodiment of the present invention, such as figure 1 As shown, a kind of solar vector calculation method based on underwater polarization distribution mode of the present invention is specifically implemented as follows:

[0053] Step 1. Use the polarization sensor to obtain any n observation directions in the underwater celestial coordinate system Underwater polarized E-vector information on Where k=1,2,...,n; n≥2, such...

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Abstract

The invention relates to a solar vector calculation method based on an underwater polarization distribution mode. First, obtain the underwater polarization azimuth angle information in at least two arbitrary observation directions in the underwater celestial coordinate system; then, based on the law of light refraction, invert the propagation direction of the atmospheric incident light in the underwater observation direction; then use the Fresnel refraction formula Determine the atmospheric polarization E-vector corresponding to the polarization E-vector observed underwater; finally, according to the Rayleigh scattering model, use the vertical relationship between the atmospheric polarization E-vector and the sun vector to obtain the sun vector. The invention establishes a basic sun vector calculation model based on the polarization distribution mode in the underwater Snell window under the horizontal posture, and can be popularized and applied to underwater application scenarios of point source type and image type polarization sensors.

Description

technical field [0001] The invention relates to a solar vector calculation method based on the underwater polarization distribution mode. The method takes into account the change of the underwater E-vector due to refraction, and realizes the calculation of the solar vector by using the polarization distribution mode in the underwater Snell window. Vector belongs to the field of underwater polarized light navigation. Background technique [0002] Currently, information available for autonomous underwater navigation is scarce. Inertial navigation is currently a widely used navigation method, which has the advantages of full autonomy and strong anti-interference, but its error will accumulate over time, so other navigation methods are needed to assist in correction. Due to the severe attenuation of electromagnetic waves in water, traditional radio and satellite navigation cannot be applied underwater; and in unknown sea areas, on the one hand, there is a lack of prior geophysi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/02G01C1/00
CPCG01C1/00G01C21/025
Inventor 郭雷胡鹏伟
Owner BEIHANG UNIV
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