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目标表面对FMCW激光雷达拍频信号的影响分析

杨德钊 宋凝芳 林志立 欧攀

杨德钊, 宋凝芳, 林志立, 等 . 目标表面对FMCW激光雷达拍频信号的影响分析[J]. 北京航空航天大学学报, 2011, 37(9): 1127-1131.
引用本文: 杨德钊, 宋凝芳, 林志立, 等 . 目标表面对FMCW激光雷达拍频信号的影响分析[J]. 北京航空航天大学学报, 2011, 37(9): 1127-1131.
Yang Dezhao, Song Ningfang, Lin Zhili, et al. Impact analysis of targets’ surface to beat-frequency signal in FMCW laser radar[J]. Journal of Beijing University of Aeronautics and Astronautics, 2011, 37(9): 1127-1131. (in Chinese)
Citation: Yang Dezhao, Song Ningfang, Lin Zhili, et al. Impact analysis of targets’ surface to beat-frequency signal in FMCW laser radar[J]. Journal of Beijing University of Aeronautics and Astronautics, 2011, 37(9): 1127-1131. (in Chinese)

目标表面对FMCW激光雷达拍频信号的影响分析

基金项目: 航天科技创新基金资助项目
详细信息
    作者简介:

    杨德钊(1981-),男,山东淄博人,博士生,yangdezhao1234@163.com.

  • 中图分类号: TN 958.98

Impact analysis of targets’ surface to beat-frequency signal in FMCW laser radar

  • 摘要: 被测目标表面的粗糙度会影响调频连续波(FMCW, Frequency Modulated Continuous-Wave)相干激光雷达的拍频信号特性,进而影响雷达的测速测距精度.为衡量该影响以改善雷达的性能,通过对照射目标面的空间离散化,建立和分析了拍频信号的场强模型,并针对不同粗糙度的反射表面,进行了Monte Carlo模拟仿真及系统实验验证.仿真和实验结果表明:镜面目标反射面的倾斜将导致拍频信号交流分量强度的急剧衰减;而对于高斯型粗糙面目标,强度与粗糙面高度及波长的比值成负指数关系.实验结果与理论分析和模拟仿真结果一致,且系统的测距误差小于1 mm,静态速度稳定性优于0.1 mm/s.

     

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出版历程
  • 收稿日期:  2010-09-07
  • 网络出版日期:  2011-09-30

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