Solar azimuth acquisition method based on atmospheric polarization modes

A technology of atmospheric polarization mode and acquisition method, which is applied to measurement devices, instruments, surveying and mapping, and navigation, etc., can solve the problems of obtaining solar orientation and insufficient utilization of atmospheric polarization information, and achieve the effect of high estimation accuracy and good environmental adaptability

Active Publication Date: 2017-05-10
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

Existing methods mainly use the polarization angle mode to estimate the sun’s orientation, while ignoring another important information in the atmospheric polarization mode—the degree of polarization mode, which will lead to insufficient utilization of the atmospheric polarization information. At present, there is no simultaneous use of atmospheric polarization. Polarization Angle mode and Polarization Degree mode to get sun azimuth reports

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  • Solar azimuth acquisition method based on atmospheric polarization modes
  • Solar azimuth acquisition method based on atmospheric polarization modes
  • Solar azimuth acquisition method based on atmospheric polarization modes

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] Such as figure 1 As shown, the solar orientation acquisition method based on the atmospheric polarization mode of the present invention specifically includes the following steps:

[0034] Step 1, atmospheric polarization mode measurement:

[0035] Atmospheric polarization mode is a special distribution mode of polarized light generated in the sky after sunlight is scattered by particles, which has a significant distribution pattern. A multi-camera-based polarization sensor is used to measure the polarization mode of a sky area in real time. The obtained polarization mode includes polarization angle mode and polarization degree mode; the polarization sensor is mainly composed of four CCD (Charge-Coupled Device) cameras, Composed of four wide-angle lenses and four polarizers, where the direction of the optical axis of the pola...

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Abstract

The invention belongs to the field of bionic polarized light navigation, and discloses a solar azimuth acquisition method based on atmospheric polarization modes. Firstly, an image type polarized light sensor is utilized to measure the atmospheric polarization modes, including a polarization angle mode and a polarization degree mode; secondly, according to the polarization angle mode, an optimization equation for a solar direction vector is created, the optimal estimation of the solar direction vector is implemented by solving eigenvectors of a matrix , and a projection of the solar direction vector is a solar azimuth; meanwhile, a gradient is worked out after the polarization degree mode is smoothed, the solar meridian is estimated according to the probability density distribution of a gradient direction, and thereby a solar azimuth can be obtained; and finally, results of the two methods are comprehensively weighted, so that an optimal estimation of the solar azimuth is obtained. Under the condition of not adding hardware structures, the invention sufficiently utilizes information contained in the polarization angle mode and the polarization degree mode to estimate a solar azimuth, and has the advantages of simple principle, high estimation precision and good robustness.

Description

Technical field: [0001] The invention relates to a method for acquiring the sun azimuth, in particular to a method for acquiring the sun azimuth based on an atmospheric polarization mode, and belongs to the field of bionic polarized light navigation. Background technique: [0002] The navigation method of animals is very peculiar, and its navigation mechanism has not been fully understood and mastered by humans. Bionic navigation has become a new hotspot in the field of navigation technology research. Many creatures (sand ants, locusts, bees, dung beetles, some birds, etc.) can use their unique eye structure to perceive and use the polarization phenomenon of light, and extract the orientation information of the sun by observing the atmospheric polarization mode to realize Navigation and positioning. Compared with classical navigation technology, bionic polarized light navigation uses sky polarization mode with natural attributes, which has the advantages of strong anti-inte...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/02
CPCG01C21/025
Inventor 王玉杰张礼廉胡小平练军想何晓峰
Owner NAT UNIV OF DEFENSE TECH
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