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

A Calculation Method of Sun Azimuth Based on cmos

A technology of solar azimuth angle and calculation method, which is applied in the field of solar azimuth angle calculation based on CMOS, can solve the problems such as the sampling points are easily affected by the external environment, the spatial resolution of photoelectric sensors is low, and the accuracy of polarization azimuth angle needs to be improved, etc. Achieve the effect of radiation-free navigation work

Active Publication Date: 2019-06-04
BEIHANG UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A method for determining the polarization azimuth angle based on a six-channel photoelectric sensor, patent number: 201410046227, limited by the low spatial resolution of the photoelectric sensor, the accuracy of the obtained polarization azimuth angle needs to be improved
The method of calculating the navigation direction angle by using the distribution law of the polarization pattern in the sky, patent number: 201010541166.6, proposes a navigation orientation method based on the polarization distribution pattern, uses the polarization information of multiple sampling points to obtain the position of the sun meridian, and thus obtains the direction required for navigation Angle information, many sampling points are easily affected by the external environment, and online calculation is difficult

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
  • A Calculation Method of Sun Azimuth Based on cmos
  • A Calculation Method of Sun Azimuth Based on cmos
  • A Calculation Method of Sun Azimuth Based on cmos

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] like figure 1 Shown, the concrete realization steps of the present invention are as follows:

[0036] 1. Use a three-channel CMOS polarization sensor to acquire three original polarization images Img 1 、Img 2 and Img 3 , and then image preprocessing is performed on the original polarized image, and the pixel gray value S of the center cropped area of ​​the three images is respectively obtained 1 , S 2 and S 3 ;

[0037] like figure 2 As shown, the polarization sensor is installed horizontally on the carrier, the lens is vertically aligned with the zenith point t along the z-axis, and the module coordinate system M is established with the center o of the polarization sensor as the origin, and the horizontal plane where the x-axis and y-axis of the module coordinate system are located is the sensor installation plane, and the x-axis and image 3 The main detection direction indicated by the solid line in channel 1 is the same, and the z-axis direction obeys the r...

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 relates to a method for calculating a solar azimuth based on a CMOS (Complementary Metal Oxide Semiconductor). The method comprises the following steps of firstly, obtaining the measurement information of the polarization image of each channel by utilizing a three-channel CMOS polarization sensor, and carrying out image pretreatment on the polarization image; secondly, compensating the measurement information of the polarization image, which is subjected to the image pretreatment, by utilizing a parameter which is well calibrated in a laboratory, so as to obtain a polarization azimuth; finally, selecting the calculation expression of the polarization azimuth by sufficiently utilizing the advantage that the sampling points of the polarization sensor based on the CMOS are many and by utilizing the distribution interval, which is obtained based on the information of an original polarization image, of the polarization azimuth, so as to obtain the solar azimuth. The method for calculating the solar azimuth based on the CMOS has the advantages of being high in precision and small in calculation amount, and can be used for a method for calculating the solar azimuth of a polarization navigation sensor based on the CMOS.

Description

technical field [0001] The invention relates to a CMOS-based solar azimuth calculation method, which can be used to improve the solar azimuth calculation accuracy of a polarized light navigation system for unmanned aerial vehicles or ground vehicles. Background technique [0002] Atmospheric polarization patterns contain sun orientation information and can be used for navigation purposes. The present invention proposes a CMOS-based solar azimuth calculation method, by measuring the direction and intensity of polarized light in the sky, the azimuth information of the sun in the module coordinate system (m system) is obtained, combined with the astronomical almanac information, the carrier's azimuth can be further obtained heading information. [0003] Traditional polarization navigation methods are limited by the performance of the sensors used, and cannot make full use of atmospheric polarization information. A method for determining the polarization azimuth angle based on...

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 Patents(China)
IPC IPC(8): G01C21/20G01C1/00
CPCG01C1/00G01C21/20
Inventor 郭雷杨健王纲牛奔
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