Movement direction angle polarization sensitivity detection method and sensor device

Abstract

This invention imitates the mechanism that the desert ant apperceives the move direction according to the sky polarized light, advances a kind of polarized sensitivity detection move direction method and sensor equipment facing to the navigation application, it belongs to the navigational goniometric sensor field. The polarization navigational sensor is mainly composed of the polarized light detection, the photoelectricity conversion, signal amplification filtering conditioning, directional light intension distinguish, simulation pressure signal collection process, azimuth angle calculate output. This invention is optical-mechanical-electrical integral design, solves the problem that the sky polarized light wave range is too large and the polarized light intension conversion range in different time is too large by choosing the specific bandpass light filter and high precision logarithm operation amplification, to make the sensor angle output be independent of the light intension conversion; at the same time it uses the particular angle normalization calculation method to remove the effect to the sensor goniometric precision because of the conversion of the sky polarized light polarized range. This invention has the merits that the structure is simple, the capability is trust, the goniometric precision is high.

Description

technical field [0001] The invention belongs to measuring equipment characterized by the use of polarized optical methods, in particular to a detection method and a sensor for measuring the angular displacement of a moving object by using a relatively stable polarized light distribution pattern in the atmosphere. Background technique [0002] Current navigation and azimuth angle sensors mainly include geomagnetic compass, inertial gyroscope and astronomical sextant. The principle and structure of the geomagnetic compass is simple, but the accuracy is low; the inertial gyroscope has high instantaneous accuracy in determining the direction of motion, but it has a large accumulated error in long-term use. In order to obtain an accurate angle of motion direction, other navigation sensors must be used to regularly calibrate the inertial gyro ; The early astronomical sextant was simple in principle and had high measurement accuracy, but there were many calculation steps for positi...

AI Technical Summary

Problems solved by technology

The principle and structure of the geomagnetic compass is simple, but the accuracy is low; the inertial gyroscope has high instantaneous accuracy in determining the direction of motion, but it has a large accumulated error in long-term use. In order to obtain an accurate angle of motion direction, other navigation sensors must be used to calibrate the inertial gyroscope ; The principle of the early astronomical sextant is simple and has high measurement accuracy, but the positioning and direction finding calculation steps are many and the time is long, so it is subject to many restrictions in practice

The astronomical direction finding sensor based on the star sensor has high measurement accuracy, but the system structure is complex, the calculation performance is high, and the production cost is also very high

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