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Sun height resolving method based on underwater refraction and scattering coupling polarization degree

A technology of sun height and polarization degree, which is applied in the field of sun height calculation, can solve the problems of not considering the refraction optical effect of the water surface, and is not applicable, so as to improve the environmental adaptability and expand the application field.

Active Publication Date: 2021-03-09
BEIHANG UNIV
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Problems solved by technology

In the above patents, the solar altitude angle is calculated based on the atmospheric polarization model of single Rayleigh scattering, without considering the complex underwater optical effects such as water surface refraction and water body scattering, so it is not suitable for the solar altitude angle in the underwater environment solve

Method used

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  • Sun height resolving method based on underwater refraction and scattering coupling polarization degree
  • Sun height resolving method based on underwater refraction and scattering coupling polarization degree
  • Sun height resolving method based on underwater refraction and scattering coupling polarization degree

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Embodiment Construction

[0052] 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.

[0053] According to an embodiment of the present invention, such as figure 1 As shown, a method for calculating the sun altitude angle based on the underwater refraction and scattering coupling polarization mode of the present invention is implemented in the following steps:

[0054] Step (1), designing a multi-directional underwater polarization sensor imitating compound eyes, such as figure 2 As shown, the underwater polarization sensor has thr...

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Abstract

The invention relates to a sun height resolving method based on underwater refraction and scattering coupling polarization degree. The method comprises the following steps: firstly, designing a compound-eye-imitating multi-directional underwater polarization sensor, defining an included angle of observation directions of the sensor, and acquiring underwater polarization degree and underwater polarization azimuth angle information of the polarization sensor in three observation directions; then determining an incident angle of atmospheric light entering the sensor based on a Rayleigh scatteringtheory and a refraction law, analyzing light propagation direction changes in scattering and refraction processes; determining the atmospheric polarization degree of light incident to each observation direction of the sensor by utilizing a Rayleigh scattering theory and a Fresnel theorem; and finally, calculating the maximum polarization degree according to the polarization degree constraint relationship in the atmosphere, and determining the solar altitude angle. According to the invention, the sun height angle resolving method based on the underwater refraction and scattering coupling polarization degree mode under the horizontal attitude is established, and can be used for navigation and positioning of an underwater carrier.

Description

technical field [0001] The invention relates to a method for calculating the sun's height based on underwater refraction and scattering coupling polarization degree. The method takes into account the change of underwater light propagation direction and polarization degree due to refraction and scattering, and realizes the use of underwater polarization degree information to determine Solving the sun altitude angle belongs to the field of underwater polarized light navigation. Background technique [0002] The ocean is the largest natural geographical unit on the earth's surface, containing abundant natural resources, and is the "second space" on which human beings rely for survival and development. Various underwater vehicles play an important role in the development and utilization of marine resources. However, due to the rapid attenuation of electromagnetic waves in water, satellite navigation is difficult to use in underwater environments; inertial navigation has cumulat...

Claims

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Application Information

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IPC IPC(8): G01C1/00G06F17/11G06F17/16
CPCG01C1/00G06F17/11G06F17/16
Inventor 杨健赵谦郭雷胡鹏伟
Owner BEIHANG UNIV
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