基于像素化偏振芯片的仿生偏振光罗盘技术

仿生光罗盘是一种通过借鉴动物视觉器官感知太阳偏振光信息(包括月光)的机理来获得载体航向信息的航向传感器。首先介绍了面向多光谱的像素化的偏振芯片结构参数化设计准则,给出了一种易于集成和小型化的仿生光罗盘总体设计方案,并对仿生光罗盘的主要误差源进行了分析;随后,提出了一种基于天空偏振图像解算载体航向的新方法,并对其环境适应性进行了初步分析;最后,对仿生光罗盘样机进行了静态实验和车载实验,在晴朗天空背景下仿生光罗盘的定向精度优于0.5°。

A Technology About Bionic Polarized Light Compass Based on Pixelated Polarizing Chip

The bionic polarized light compass is a sensor that obtains the heading information by referring to the mechanism of the animal''s visual organs to sense the polarized light information of the sun (or moonlight). In this paper, the parameter design criteria of pixelated polarizers are introduced. And the overall design scheme of a bionic polarized light compass are proposed, which is easy to integrate and miniaturize. The main error sources affecting the orientation accuracy of the polarized light compass are analyzed. A new method for estimating the heading of the carrier based on the polarized image of the sky are proposed. And its environmental adaptability is analyzed. The results of static experiment and vehicle experiment show that the orientation accuracy of the polarized light compass under clear sky is better than 0.5 °.