声光移频器对微多普勒效应探测的影响研究

郭力仁; 胡以华; 李政; 徐世龙

doi:doi:10.3788/aos201535.0212006

光学学报, 2015, 35 (2): 0212006, 网络出版: 2015-01-09

声光移频器对微多普勒效应探测的影响研究

Research on Infulence of Acousto-Optic Frequency Shifter to Micro-Doppler Effect Detection

论文大纲

郭力仁 ^*胡以华李政徐世龙

作者单位

解放军电子工程学院脉冲功率激光技术国家重点实验室,电子制约技术安徽省重点实验室, 安徽合肥 230037

测量微多普勒效应声光移频器相干探测 measurement micro-Doppler effect acousto-optic frequency shifters coherent detection

摘要

为实现基于微多普勒效应的远距离目标探测和识别，研究了采用声光移频器的激光外差相干探测结构对目标微多普勒特征探测的影响。建立了声光移频器驱动功率与系统信噪比之间的数学模型，并进行了仿真计算，搭建了1550 nm 激光外差/零差相干探测实验平台对所建模型进行了验证。研究结果表明：在移频器驱动电压限定范围内，驱动电压越高，对微多普勒效应探测的效果越好，得到的目标特征越明显，与理论分析一致。通过对比实验发现在同样条件下，外差探测得到的反映目标特征的时频分布曲线较零差的清晰，特征提取误差小，可读性更高，说明外差探测结构更有利于复杂的远距离目标探测。

Abstract

In order to detect and recognize remote targets based on micro-Doppler effect，the influence of heterodyne lidar system composed by acousto-optic frequency shifters to micro-Doppler feature extraction is researched. Mathematical models between driving power of frequency shifter and signal to noise ratio are established, and simulations and experiments are performed through 1550 nm experimental system to verify their validity. The research shows that within the limiting driving voltage scope, the higher the voltage, the better the detection result is, which is in accordance with the theoretical analysis. Through the contrast experiment，heterodyne detection system is found better than homodyne in time-frequency curve of target feature acquisition. The smaller extracting error and the higher readability indicate that heterodyne system is more conductive than complicated remote target detection.

参考文献

[1] V C Chen. Micro-Doppler effect of micromotion dynamics: a review [C]. AeroSense, 2003, International Society for Optics and Photonics, 2003. 240-249.

[2] J A Nanzer, R L Rogers. Bayesian classification of humans and vehicle using micro-Doppler signals from a scanning-beam radar [J]. IEEE Microwave and Wireless Components Letters, 2009, 19(5): 338-340.

[3] V Chen. The Micro-Doppler Effect in Radar [M]. Norwood: Artech House, 2011. 47-55.

[4] V C Chen, F Li, S Ho, et al.. Micro-Doppler effect in radar: phenomenon, model and simulaion study [J]. IEEE Trans AES, 2006, 42(1): 2-21.

[5] 陈鹏, 郝士琦, 赵楠翔, 等. 直升机旋翼微多普勒特性分析[J]. 红外与激光工程, 2013, 42(12): 3259-3264.

Chen Peng, Hao Shiqi, Zhao Nanxiang, et al.. Micro-Doppler analysis of helicopter′ s rotor blades [J]. Infrared and Laser Engineering, 2013, 42(12): 3259-3264.

[6] 孙洋, 张骏, 范亚夫. 1550 nm 激光相干雷达探测运动目标的微多普勒效应[J]. 中国激光, 2010, 37(5): 1222-1226.

Sun Yang, Zhang Jun, Fan Yafu. Detecting micro-Doppler effect of micro-motion dynamics by laser coherent radar of 1550 nm [J]. Chinese J Lasers, 2010, 37(5): 1222-1226.

[7] Wil Otaguro, Cecil Hayes. Microdoppler ladar system [C]. SPIE, 2000, 4091: 268-277.

[8] T Thayaparan, S Abrlo, E Riseborough. Micro-Doppler Radar Signatures for Itelligent Target Recognition [R]. Ottawa: Defence Research and Development Canada Ottawa, 2004.

[9] 马宗峰, 张春熹, 张朝阳, 等. 光学外差探测信噪比研究[J]. 光学学报, 2007, 27(5): 889-892.

Ma Zongfeng, Zhang Chunxi, Zhang Zhaoyang, et al.. Singal-noise ratio in optical heterodyne detection [J]. Acta Optica Sinica, 2007, 27(5): 889-892.

[10] 原帅, 王学勤, 盛美菊, 等. 激光微多普勒探测运动目标复合振动的实验研究[J]. 激光与红外, 2007, 37(10): 1036-1038.

Yuan Shuai, Wang Xueqin, Sheng Meiju, et al.. Experimental research on laser micro-Doppler for detecting complex viberation of moving target [J]. Laser & Infrared, 2007, 37(10): 1036-1038.

[11] 董晶. Φ200 mm 微多普勒效应激光雷达相干探测系统及实验研究[D]. 烟台大学, 2012.

Dong Jin. 200 mm Micro-Doppler Effect Lidar Heterodyne Detection System and Experiment Research [D]. YanTai University, 2012.

[12] M G Anderson, R L Rogers. Micro-Doppler analysis of multiple frequency continuous wave radar signatures [J]. Radar Sensor Technology XI, Proceedings of SPIE, 2007: 65470A.

[13] P Gatt, S W Henderson, J A L Thomson, et al.. Micro-Doppler lidar signals and noise mechanisms: theory and experiment [C]. AeroSense 2000. International Society for Optics and Photonics, 2000. 422-435.

[14] 董晶, 陈蕊, 李小龙, 等. 运动目标微多普勒效应的激光雷达相干探测及特征提取[J]. 中国激光, 2013, 39(10): 1014001.

Dong Jing, Chen Rui, Li Xiaolong, et al.. Lidar coherent detection and feature extraction of moving target based on micro-Doppler effect [J]. Chinese J Lasers, 2013, 39(10): 1014001.

[15] 于维娟. 1.55 μm 全光纤声光移频器衍射效率及激光外差的实验研究[D]. 哈尔滨工业大学, 2008.

Yu Weijuan. Experimental Research on 1.55 mm All-Fiber Acousto-Optic Shifter Diffraction Efficiency and Laser Heterodyne [D]. Harbin Institute of Technology，2008.

[16] 尚建华, 任立红, 徐海芹, 等. 基于双声光移频器的外差式激光多普勒测振计[J]. 光子学报, 2012, 41(10): 1149-1155.

Shang Jianhua, Ren Lihong, Xu Haiqin, et al.. Heterodyne laser Doppler vibrometer based on double acousto-optic frequency shifters [J]. Acta Photonica Sinica, 2012, 41(10): 1149-1155.

[17] 安毓英, 曾晓东. 光电探测原理[M]. 第2版. 西安: 西安电子科技大学出版社, 2009. 152-157.

An Yuying, Zeng Xiaodong. Photoelectric Detection Principle [M]. 2nd edition. Xi′an: Xidian University Press, 2009. 152-157.

[18] 杨彦玲, 李彦超, 高龙, 等. 相干激光雷达平衡外差探测方法的数值仿真[J]. 红外与激光工程, 2011, 40(10): 1918-1922.

Yang Yanling, Li Yanchao, Gao Long, et al.. Numerical simulation of balanced heterodyne detection for coherent lidar [J]. Infrared and Laser Engineering, 2011, 40(10): 1918-1922.

[19] 王春晖, 高龙, 庞亚军, 等. 光束分束比对2 μm 平衡式相干探测系统信噪比影响的实验研究[J]. 光学学报, 2011, 31(11): 1104002.

Wang Chunhui, Gao Long, Pang Yajun, et al.. Experimental investigation for relation between beam splitter coefficient and signalto-noise ratio of 2 μm balanced coherent system [J]. Acta Optica Sinica, 2011, 31(11): 1104002.

[20] 彭明金, 李智. 基于希尔伯特-黄变换的激光微多普勒信号分析与特征提取[J]. 中国激光, 2013, 40(8): 0809004.

Peng Mingjin, Li Zhi. Analysis and feature extraction of laser micro-Doppler signatures based on Hilbert-Huang transforms [J]. Chinese J Lasers, 2013, 40(8): 0809004.

郭力仁, 胡以华, 李政, 徐世龙. 声光移频器对微多普勒效应探测的影响研究[J]. 光学学报, 2015, 35(2): 0212006. Guo Liren, Hu Yihua, Li Zheng, Xu Shilong. Research on Infulence of Acousto-Optic Frequency Shifter to Micro-Doppler Effect Detection[J]. Acta Optica Sinica, 2015, 35(2): 0212006.

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