大气偏振图景检测精度直接决定了系统载体的导航定位精度。基于视觉仿生原理,提出了一种四通道时分复用(TDM)大气偏振图景检测技术。该技术采用2组4个探测通道和时分复用技术实现大气偏振信号分时检测,获得大气偏振图景信息。与已有技术相比,该技术既简化了测量系统,又有效减少了通道信号增益差异与大气光强变化对探测信号的影响。实验表明,基于视觉仿生原理的大气偏振检测技术能够明显降低大气偏振测量误差,提高大气偏振测量精度。基于该技术的仿生偏振检测系统能够获得定位级的星体位置信息,实现载体的自主导航定位。

The navigation and positioning accuracy is mainly dependent on measurement accuracy of atmospheric polarization imaging. A four-channel time division multiplexing (TDM) atmospheric polarization measurement technique based on bionic principle is proposed and investigated. The technique measures atmospheric polarization signals with four detecting channels based on TDM. Compared with developed techniques,the technique simplifies measurement system and decreases effects from channel signal gain difference and atmosphere signal intensity change. Experimental results show that the technique significantly reduces measurement error and improves measurement accuracy of atmospheric polarization. A measurement system based on the technique can obtain reliable position information of the star for navigation and positioning.