基于偏振成像的方位角度解算算法的设计与验证  

Design and verification of an orientation algorithm based on polarization imaging

作　　者：卢皓[1,2] 赵开春[1] 尤政[1] 王晓初[1] 

机构地区：[1]清华大学精密测试技术及仪器国家重点实验室,北京100084 [2]军械工程学院,石家庄050003

出　　处：《清华大学学报（自然科学版）》2014年第11期1492-1496,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八六三"高技术项目(2013AA122601)

摘　　要：成像式偏振导航传感器较点源式偏振导航传感器,具有精度高、抗干扰能力强的优势,但目前尚无一种有效的成像式偏振导航算法。该文分析了天空偏振分布模式中太阳子午线在传感器平面上投影的特征,推导出在传感器平面内有且只有一条直线,其上的偏振角度为90°且这条直线就是太阳子午线;根据太阳子午线的这一特性,提出一种基于偏振成像的太阳方位角解算算法。使用偏振成像验证平台对算法进行了验证。在实际天空偏振环境的测量中,太阳方位角的测量重复精度优于0.074°(3σ)。Polarization imaging navigation is more accurate and has stronger anti-interference capacities than point source polarization navigation sensors which use photodiodes. Effective algorithms are needed for polarization imaging navigation. The effect of the solar meridian in the projection of the polarized skylight pattern on the sensor is analyzed to show that the solar meridian is the only line on which points only have a polarization angle of 90°. The characteris ties of the solar meridian are used to develop a solar azimuth algo- rithm using polarization imaging. Tests of its performance using a polarization imaging platform show that its azimuth precision is bet- ter than 0. 074° （3б）.

关 键 词：方位确定 偏振导航 偏振成像 HOUGH变换 太阳方位角 

分 类 号：U666.1[交通运输工程—船舶及航道工程]