一种基于正交线偏振光的高精度方位测量方法

发布时间：2018-04-29 13:15

本文选题：方位 + 高精度测量　；参考：《光电子·激光》2017年01期

【摘要】：为了解决传统基于正弦波磁光调制的方位测量方法存在小角度精确测量时信号微弱、处理难度大等问题,提出了一种基于正交线偏振光磁光调制的方位精确测量方法。首先简单阐述了传统方位测量原理,分析了小角度范围内测量时信号微弱的根本原因;其次提出了改进的方位测量方法,在阐述测量装置结构原理的基础上,建立了基于磁光调制后两束正交线偏振光的光强模型,通过分析发现两路调制后混合信号中交流信号的极值点信息均与方位角相关,且同一位置对应的极值点信息具有相位相反的特性,采用二者相减的方式增强了有用信号的幅值,提高了数据采集精度。仿真结果表明,通过各种情况下与传统方法中参与方位角计算的信号幅值对比,文中提出的方法能够明显增强信号幅值,利于提高数据采集精度和方位测量精度。
[Abstract]:In order to solve the problem that the traditional azimuth measurement method based on sinusoidal magneto-optic modulation has weak signal when measuring accurately at small angle and is difficult to deal with, a method of azimuth precise measurement based on orthogonal line polarized magneto-optic modulation is proposed. Firstly, the principle of traditional azimuth measurement is briefly expounded, and the fundamental cause of weak signal in small angle range is analyzed. Secondly, an improved method of azimuth measurement is put forward, on the basis of expounding the structure principle of measuring device, Based on the intensity model of two orthogonal linearly polarized beams after magneto-optic modulation, it is found that the extremum information of AC signal in the mixed signal is related to the azimuth angle. The extremum information corresponding to the same position has the characteristics of opposite phase. The amplitude of the useful signal is enhanced and the data acquisition accuracy is improved by using the two subtraction methods. The simulation results show that the proposed method can obviously enhance the signal amplitude and improve the precision of data acquisition and azimuth measurement by comparing with the traditional method in the calculation of azimuth.
【作者单位】：火箭军工程大学兵器发射理论与技术国家重点学科实验室;
【基金】：国家自然科学基金(61505254)资助项目
【分类号】：O436.3

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