摘要
为了提高传统基于正弦波磁光调制的方位测量系统的精度，通过改变调制信号波形的方式提高系统测量精度，将三角波磁光调制引人了方位测量系统中，提出了基于三角波磁光调制的方位测量方法。建立了三角波调制信号模型，并根据法拉第磁致旋光效应和马吕斯定律推导出了调制后信号模型；通过分析调制后信号特点，掌握了调制后信号中与方位角相关的信息；利用取样积分电路采集了调制后交流信号中横坐标不变的极值点，并根据其与方位角的关系，建立了方位角测量模型。仿真分析以及与传统方法的对比表明：两种方法理论测量范围相当，但是三角波磁光调制方法的理论测量精度较高，这为实现方位角高精度测量提供了一种新方案，具有一定的指导意义。
In order to improve the measurement precision of the traditional azimuth measurement system theoretically, as the new modulation signal, triangle wave is introduced into the system, and the method of measuring azimuth based on triangle wave magneto-optical modulation is present. In the new method, the model of modulation signal is present, and the model of the signal from modulator is present too according to the Faraday effect and Malous law. The signal from modulator is analyzed, its extremums is detected, the relationship between azimuth and extremums is present, and then the model of measuring azimuth is established. The measurement precision and scale of the new method is analyzed, simulation results show that the measurement precision of the new method is higher than the traditional one, and their measurement scale is same, it provides a new scheme to measuring azimuth in higher-precision.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2015年第A01期178-183,共6页
Acta Optica Sinica
关键词
测量
方位角
三角波
磁光调制
measurement
azimuth
triangle wave
magneto-optical modulation
