A Method for Estimating and Compensating Light Intensity Harmonic Interference of Polarization Sensor
A technology of harmonic interference and compensation method, applied in the field of space navigation, which can solve the problems of inconsistent extinction ratio error, need to be studied, and the influence of polarization sensor parameters is not considered.
Active Publication Date: 2022-03-11
BEIHANG UNIV
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The polarization sensor calibration method proposed in the above papers and patents is suitable for calibration of sensor parameters such as polarizer installation error, extinction ratio inconsistency error, and scaling factor in an ideal calibration environment. It does not consider the impact of the calibration environment on polarization sensor parameters. Quantitative analysis and characterization of environmental interference
Due to the interference in the calibration test environment itself, it will affect the calibration accuracy of the polarization sensor parameters and affect the angle measurement performance of the polarization sensor
Therefore, how to estimate and compensate the interference caused by the calibration environment, and improve the estimation accuracy of the polarization sensor calibration parameters and the accuracy of the polarization angle calculation remains to be studied.
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[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0035] When performing polarization sensor calibration, because the center of the integrating sphere, the center of the turntable, and the center of the sensor are not on the same axis; the light emitted by the integrating sphere is not uniform; Strong harmonic interference seriously affects the estimation accuracy of sensor parameters and the accuracy of polarization angle calculation. The method for estimating and compensating light intensity har...
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The invention proposes a method for estimating and compensating light intensity harmonic interference of a polarization sensor. The state equation of wave interference; use the light intensity measurement value of each channel as a measurement to establish a measurement equation based on light intensity; obtain the light intensity measurement values of the polarization sensor at different angles on the high-precision turntable; use the Kalman filter method , simultaneously estimate the calibration parameters and light intensity harmonic interference of each channel of the sensor; compensate the estimated light intensity harmonic interference in the light intensity measurement value of each channel, and calculate the polarization angle and polarization degree. The polarization sensor light intensity harmonic interference estimation and compensation method proposed by the present invention can improve the estimation accuracy of the polarization sensor calibration parameters, and by independently compensating the light intensity harmonic interference caused by the environment, the solution to the polarization angle under different lighting conditions is improved. precision.
Description
technical field [0001] The invention belongs to the field of space navigation, and relates to a method for estimating and compensating light intensity harmonic interference of a polarization sensor, which is used for estimating the light intensity harmonic interference caused by the calibration environment, and improving the estimation accuracy of polarization sensor calibration parameters and the ratio of polarization angle and degree of polarization Solution accuracy. Background technique [0002] After research, it is found that creatures in nature can navigate and locate autonomously by sensing the distribution of polarized light in the sky. This biological navigation method has the advantages of high autonomy and strong anti-interference. In recent years, in order to improve the accuracy of autonomous navigation in GNSS interference and denial environments, and learn biological navigation methods, bionic polarized light navigation was proposed. As the sensing part of ...
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IPC IPC(8): G01C21/20
CPCG01C21/20
Inventor 杨健刘鑫胡鹏伟郭雷
Owner BEIHANG UNIV