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合成孔径激光雷达振动相位误差的模拟探测

Simulative Detection of Vibration-Phase Error of Synthetic Aperture Lidar

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摘要

为了探测合成孔径激光雷达的平台振动引起的相位误差,采用一种新的振动测量方法,利用激光外差平衡探测和正交信号处理技术,直接提取探测信号相位,并对正交信号之间的不平衡度引起的误差进行了校正,得到系统探测相位灵敏度为1.45 rad。实验表明,该方法不但能够精确测量低频率微小振动位移引起的相位变化,而且对回波信号的幅度波动不敏感,有别于激光多普勒振动计。

Abstract

In order to detect the phase error caused by platform vibration of synthetic aperture lidar, a new method of vibration measurement was proposed, which extracted the detection signal phase directly with heterodyne balanced detection and quadrature signal processing technology. Then the errors caused by the unbalance between the two quadrature signals were corrected and the obtained phase sensitivity was 1.45 rad. The experiment showed that this method not only can accurately measure phase variation caused by small vibration with low frequency, but also was insensitive to the amplitude of echo signals′ fluctuation, which was different from the laser Doppler vibrometer.

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中图分类号:TN958

DOI:10.3788/aos201131.0512001

所属栏目:仪器,测量与计量

基金项目:国家973计划(2009CB724004)资助课题。

收稿日期:2010-10-28

修改稿日期:2011-01-05

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作者单位    点击查看

徐显文:中国科学院上海技术物理研究所空间主动光电系统技术实验室, 上海 200083
洪光烈:中国科学院上海技术物理研究所空间主动光电系统技术实验室, 上海 200083
凌元:中国科学院上海技术物理研究所空间主动光电系统技术实验室, 上海 200083
胡以华:中国科学院上海技术物理研究所空间主动光电系统技术实验室, 上海 200083
舒嵘:中国科学院上海技术物理研究所空间主动光电系统技术实验室, 上海 200083

联系人作者:徐显文(xuxianwen3@163.com)

备注:徐显文(1986—),男,博士研究生, 主要从事合成孔径激光雷达及信号处理等方面的研究。

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引用该论文

Xu Xianwen,Hong Guanglie,Ling Yuan,Hu Yihua,Shu Rong. Simulative Detection of Vibration-Phase Error of Synthetic Aperture Lidar[J]. Acta Optica Sinica, 2011, 31(5): 0512001

徐显文,洪光烈,凌元,胡以华,舒嵘. 合成孔径激光雷达振动相位误差的模拟探测[J]. 光学学报, 2011, 31(5): 0512001

被引情况

【1】段洪成,吴谨,赵志龙,吴曙东. 短光纤延时自外差测量单频激光器频率漂移. 中国激光, 2015, 42(7): 702008--1

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