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文摘
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A target signal phase self-correction method was proposed for Doppler asymmetric spatial heterodyne technique. First by sampling the interferogram frames of monochromatic light under different wind speed continuously, the phase drift was recorded. Then by fitting the phase curves at different speed and calculating the distance between two fitting lines, the phase drift was eliminated. The wind detection system was established in the laboratory to obtain the sampling interferogram and correct the phase error. The result shows that the error is up to 30.78 m/s at the wind speed of 60.37 m/s, and there is a great improvement after phase drift correction with a speed error of 3.51 m/s. Several groups of experiment under different wind speed were conducted and the wind speed was retrieved with a precision of 2.97 m/s finally. |
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其他语种文摘
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针对多普勒非对称空间外差干涉技术,提出一种目标信号相位自校正的方法.首先通过连续采样单色光的干涉图跟踪绝对相位漂移;然后分段线性拟合不同风速下的干涉相位,通过计算两条拟合曲线距离去除相位漂移.搭建风速模拟实验平台,获得采样干涉图,并对相位误差进行校正.结果表明,在60.37 m/s的模拟风速下,相位漂移误差达到30.78 m/s,通过相位校正风速反演误差降低至3.51 m/s,风速精度得到较大改善.最终通过几组不同风速下的反演值得到了平均2.97 m/s的风速测量精度. |
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来源
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光子学报
,2017,46(9):0901003-1-0901003-7 【核心库】
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DOI
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10.3788/gzxb20174609.0901003
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关键词
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Fourier transform
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Spectrum analysis
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Interferogram measurements
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Phase shift
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Wind speed
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地址
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Anhui Institute of Optics and Fine Mechanics,Hefei Institutes of Physical Science, Chinese Academy of Sciences, Key laboratory of Optical Calibration and Characterization of Chinese Academy of Sciences, Hefei, 230031
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1004-4213 |
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学科
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物理学 |
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基金
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xx-5 Satellite Data Simulation Project
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文献收藏号
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CSCD:6075817
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