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A Bionic Polarization Compass Calibration Method Based on Polarization Two-Dimensional Residual Information

A calibration method and polarization azimuth angle technology, applied in the direction of rotating gyroscope, etc., can solve the problems of inconsistent extinction ratio of polarizer, failure to consider extinction ratio of polarizer, and affecting the accuracy of sensor navigation solution, etc., so as to improve the calibration accuracy, Effects that improve solver performance and stability

Active Publication Date: 2022-02-01
BEIHANG UNIV
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the technical deficiency that the extinction ratio of the analyzer is not considered in the measurement equation of the existing polarization sensor to affect the accuracy of the sensor navigation solution, and to provide a bionic polarization compass calibration based on the polarization two-dimensional residual information method
Firstly, aiming at the problem of inconsistency of the extinction ratios of the analyzers of each channel, by introducing the extinction ratio coefficient to balance the difference in the degree of polarization caused by the inconsistency, the mapping relationship between the extinction ratio coefficient and the output light intensity of the bionic polarization compass is established

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  • A Bionic Polarization Compass Calibration Method Based on Polarization Two-Dimensional Residual Information
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  • A Bionic Polarization Compass Calibration Method Based on Polarization Two-Dimensional Residual Information

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0050] Such as figure 1 As shown, the specific implementation steps of a low extinction ratio bionic polarization compass calibration method based on the polarization degree error of the present invention are as follows:

[0051] (1) Establish the extinction ratio δ and the output light intensity I of the bionic polarization compass pol The mapping relationship of the bionic polarization compass, for the analyzer between each analysis channel of the bionic polarization compass, by introducing the extinction ratio coefficient κ i Balance the inconsistency of the degree of polarization d caused by the difference in extinction ratio of each polarization analysis channel, and derive based on the extinction ratio coefficient κ i The polarization information measurement equation of ;

[0052] (2) Establish the installation error of the analyzer an...

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Abstract

The invention discloses a bionic polarization compass calibration method based on polarization two-dimensional residual information. Firstly, aiming at the problem of inconsistency of the extinction ratios of the analyzers of each channel, by introducing the extinction ratio coefficient to balance the difference in the degree of polarization caused by the inconsistency, the mapping relationship between the extinction ratio coefficient and the output light intensity of the bionic polarization compass is established. Then, considering the installation error of each channel analyzer, the channel coupling coefficient and the polarizer installation angle error coefficient are introduced into the polarization measurement equation. Finally, a two-dimensional residual objective optimization function based on polarization azimuth and polarization degree is established, and the parameters of the bionic polarization compass measurement equation are iteratively estimated, and finally the coefficient parameters of the bionic polarization compass are obtained. The invention fully considers the influence of the internal extinction ratio of the sensor and its inconsistency on the accuracy of the polarization solution, uses the dual error information of the polarization azimuth and the degree of polarization to realize the refined calibration of the model parameters of the bionic polarization compass, and effectively improves the polarization of the polarization compass Information solution accuracy and stability.

Description

technical field [0001] The invention relates to a bionic polarization compass calibration method based on polarization two-dimensional residual information, which fully considers the influence of the internal extinction ratio of the sensor and its inconsistency on the polarization solution accuracy, and realizes it by using dual error information of polarization azimuth angle and polarization degree The refined calibration of the model parameters of the bionic polarization compass effectively improves the accuracy and stability of the polarization information calculation of the polarization compass. Background technique [0002] Inspired by the polarization vision mechanism of insects in nature, researchers have developed various types of bionic polarization sensors. In recent decades, research on bionic polarization sensors has mainly developed in two directions. One is to imitate the opposite perception mechanism of polarization neurons The designed point source polarizati...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C19/38
CPCG01C19/38
Inventor 郭雷任浩男杨健刘鑫
Owner BEIHANG UNIV
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