Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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, affecting sensor navigation calculation accuracy, etc., to improve calculation accuracy and stability, improve solution performance and stability, and improve calibration accuracy

Active Publication Date: 2020-07-28
BEIHANG UNIV
View PDF12 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Bionic polarization compass calibration method based on polarization two-dimensional residual information
  • Bionic polarization compass calibration method based on polarization two-dimensional residual information
  • Bionic polarization compass calibration method based on polarization two-dimensional residual information

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a bionic polarization compass calibration method based on polarization two-dimensional residual information. Firstly, aiming at the problem that extinction ratios of analyzersof all channels are inconsistent, an extinction ratio coefficient is introduced to balance polarization degree difference caused by inconsistency, and a mapping relation between the extinction ratio coefficient and the output light intensity of the bionic polarization compass is established. Secondly, a channel coupling coefficient and a polaroid installation angle error coefficient are introducedinto a polarization measurement equation in consideration of the installation error of each channel analyzer; and finally, a two-dimensional residual error target optimization function is establishedbased on the polarization azimuth angle and the polarization degree, iterative estimation on parameters of a measurement equation of the bionic polarization compass is carried out, and finally coefficient parameters of the bionic polarization compass are obtained. The influence of the extinction ratio in the sensor and the inconsistency of the extinction ratio on the polarization calculation precision is fully considered, fine calibration of bionic polarization compass model parameters is realized by utilizing dual error information of the polarization azimuth angle and the polarization degree, and the polarization information calculation precision and stability of the polarization compass are effectively improved.

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/38
CPCG01C19/38
Inventor 郭雷任浩男杨健刘鑫
Owner BEIHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com