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Polarization navigation information detection sensor with independent channels

A polarization navigation and information detection technology, applied in navigation, mapping and navigation, navigation calculation tools, etc., can solve the problems of complex calculation process, many detection channels, and low accuracy.

Active Publication Date: 2013-10-23
HEFEI UNIV OF TECH
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Problems solved by technology

There are many detection channels, the hardware circuit is complex, the integration level is generally not high, and the calculation process is complicated. In practical applications, it is difficult to ensure that the polarization direction of each polarized light acquisition channel is consistent with the theoretical value. At the same time, the gain consistency of each channel cannot be guaranteed, resulting in polarization Navigation information detection sensors have inevitable quadrature errors and gain difference errors of each channel, making their accuracy generally not high

Method used

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  • Polarization navigation information detection sensor with independent channels
  • Polarization navigation information detection sensor with independent channels
  • Polarization navigation information detection sensor with independent channels

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Embodiment Construction

[0034] In this example, if figure 1 As shown, the independent channel polarization navigation information detection sensor includes a polarized light acquisition module, an unbiased channel, and a signal processing and computing module;

[0035] The polarized light acquisition module is composed of three independent polarization acquisition channels, each polarization acquisition channel is composed of a filter, a polarizer and a photodiode; the photodiode collects the light through the filter and polarizer and outputs a polarization current signal To the signal processing and arithmetic module.

[0036] The unbiased channel is composed of a filter and a photodiode; the photodiode of the unbiased channel collects the light passing through the filter and outputs a reference current signal to the signal processing and operation module; the reference current signal is only consistent with the received signal of the unbiased channel It is related to the light intensity, and the r...

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Abstract

The invention discloses a polarization navigation information detection sensor with independent channels, and is characterized in that: the sensor includes a polarized light acquisition module, an unbiased channel, and a signal processing and calculation module; the polarized light acquisition module includes three mutually independent polarization detection channels for acquiring polarized light information; the unbiased channel acquires a light output standard current signal and provides a standard for automatic gain control; the signal processing and calculation module completes processing, amplification, conversion and calculation of the signal to obtain polarization navigation information. The sensor can effectively improve the accuracy of the atmospheric polarization navigation information detection.

Description

Technical field: [0001] The invention relates to the technical field of intelligent information acquisition and navigation, in particular to an independent channel polarization navigation information detection sensor. Background technique: [0002] Sunlight itself is a natural light source, but it is scattered and reflected by particles in the atmosphere during atmospheric transmission, resulting in polarized light. Sunlight with different polarization directions and different polarization degrees forms a specific polarization state distribution, that is, the atmospheric polarization mode. Atmospheric polarization mode is closely related to geographical location, sun position, atmospheric environment, weather conditions, and even ground environment. It mainly includes parameters such as atmospheric polarization degree and polarization direction, which contain important navigation information. [0003] Professor Rüdiger Wehner of the University of Zurich in Switzerland and h...

Claims

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Application Information

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IPC IPC(8): G01C21/00G01C21/20
Inventor 范之国李逸博高隽王昕王波
Owner HEFEI UNIV OF TECH
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