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Polarization azimuth angle determination method based on six-channel photoelectric sensor

A polarization azimuth, photoelectric sensor technology, applied in the direction of measuring the polarization of light, instruments, scientific instruments, etc., can solve the problems affecting the application of polarization navigation technology, device errors, and difficulty in ensuring measurement accuracy.

Active Publication Date: 2014-04-30
青岛智融领航科技有限公司
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Problems solved by technology

Fan Zhiguo and others from Hefei University of Technology first proposed a calculation method based on four-channel polarization azimuth angles. The polarization detection directions are 0 and π / 3 respectively. However, due to the device error in the polarization measurement system and the zero overflow problem in the calculation process , the calculation error of the polarization azimuth angle is relatively large; subsequently, another four-channel polarization azimuth calculation method was proposed. The division overflow problem still exists; in recent years, someone has proposed a polarization azimuth calculation method based on the polarization detection array, which realizes the calculation of the navigation azimuth angle by fitting the polarization degrees of multiple observation points in the sky. The weather is greatly affected, and the actual measurement accuracy is difficult to guarantee, and this method can only be used for two-dimensional navigation
The above problems have seriously affected the application of polarization navigation technology in engineering practice

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  • Polarization azimuth angle determination method based on six-channel photoelectric sensor
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  • Polarization azimuth angle determination method based on six-channel photoelectric sensor

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Embodiment Construction

[0052] like figure 1 Shown, the concrete realization steps of the present invention are as follows:

[0053] 1. Obtain the logarithmic processing results of the measurement data of the three sets of polarization analysis units of the six-channel polarization sensor:

[0054] The light intensity measurement output of the main analyzer channel can be expressed as:

[0055]

[0056] where n∈{1,2,3}, is the light intensity measurement output of the main analyzer channel of the nth group of detection units, I represents the relative optical power, d represents the degree of polarization, is the polarization azimuth angle, like figure 2 As shown, the module coordinate system M is established based on the polarization sensor, the plane where the x-axis and y-axis of the module coordinate system are located is the sensor installation plane, the z-axis direction obeys the right-hand rule and points to the direction of the observed point, P is the observed point, and PE is T...

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Abstract

The invention relates to a polarization azimuth angle determination method based on a six-channel photoelectric sensor, which comprises the steps of acquiring polarization light intensity measurement information of each channel, realizing logarithm processing of the measurement information, judging with a logarithm processing result to obtain a polarization detection direction (a nearest polarization detection direction) with a minimum included angle with a polarization direction, obtaining a polarization azimuth angle distribution interval based on the nearest polarization detection direction, selecting a polarization azimuth angle calculation formula according to the polarization azimuth angle distribution interval, and realizing polarization azimuth angle calculation of the whole definition interval. The method has the advantages of high precision, good stability and the like, and can be used for determining a polarization azimuth angle of a polarization navigation system based on photoelectric measurement.

Description

technical field [0001] The invention relates to a method for determining the polarization azimuth angle based on a six-channel photoelectric sensor, which can be used to improve the resolution accuracy of the polarization azimuth angle of a polarized light navigation system or an integrated navigation system for an aircraft, a mobile robot or a ground vehicle. Background technique [0002] After sunlight enters the atmosphere, it is scattered by atmospheric molecules to produce different polarization states. In 1871, the famous British physicist Rayleigh proposed the Rayleigh scattering law, which revealed the light scattering characteristics, and then people obtained the full-space atmospheric polarization distribution model based on the Rayleigh scattering law. The atmospheric polarization distribution pattern is relatively stable, which contains rich navigation information. Many creatures in nature can use sky polarized light for navigation or auxiliary navigation. As a ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/00G01C21/20G01C1/00
CPCG01C1/00G01C21/00G01C21/20G01J4/00
Inventor 郭雷罗建军杨健杜涛赵倩
Owner 青岛智融领航科技有限公司
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