光谱学与光谱分析, 2017, 37 (4): 1174, 网络出版: 2017-06-20  

基于双调制的反伪装目标探测系统研究

Research on Target Recognition System for Camouflage Target Based on Dual Modulation
作者单位
1 吉林农业大学信息技术学院, 吉林 长春 130118
2 长春理工大学光电工程学院, 吉林 长春 130022
3 长春工业大学计算机科学与工程学院, 吉林 长春 130012
4 北京振兴计量测试研究所, 北京 100074
摘要
为了实现对被伪装网覆盖的被测目标进行有效探测, 提高目标识别系统的反伪装能力, 设计了基于电光和磁光双调制的目标识别系统。 系统由起偏器、 电光调制电路、 磁光调制电路、 检偏器、 光电探测器等组成。 推导了基于电光调制与磁光调制组合形成的调制函数, 并在矢量分析的基础上, 计算了电光调制参数δ与磁光调制参数θ对回波光强函数的影响。 实验以边长1 m的正方形钢板为测试目标, 与两种常用伪装网配合在不同背景环境中进行反伪装目标探测。 对不同偏振角条件下的回波光强响应电压进行了测试与分析。 结果显示, 目标与伪装网均存在明显的响应峰值, 但由于目标位置及角度不同峰峰值位置有所不同, 而背景不存在较强的响应值。 故在整个磁光调制周期内, 可以获得响应电压极值信号, 从而识别伪装目标。 对不同波长条件下的回波光强响应电压进行测试可知, 光源波长的改变对回波峰峰值与背景噪声具有一定的影响, 从而可以通过适当的调节光源波长实现提高目标图像信噪比的目的。 总之, 该系统在目标有伪装网覆盖的条件下仍能较好地区分目标及背景, 具有很好地反伪能力。
Abstract
In order to achieve effective detection target covered by camouflage nets, and to improve recognition ability to camouflage target, a target recognition system was designed based on the electro-optical and magneto-optical dual modulation. The system was composed of polarizer, electro-optical modulation module, magneto-optical modulation module, analyzer, photoelectric detectors and other components. It produced the modulation function combination of electro-optical modulation and magneto-optical modulation, and the composite modulation function was derived. On the basis of vector analysis, the impact of the function of the intensity of echo light was analyzed with the modulation parameters for electro-optical and magneto-optical. In the experiment, a square steel side length of 1m was used as the test target, and two kinds of commonly camouflage nets were used for target detection in different background environments. Under different polarization angles conditions, the response voltage of echo light was tested and analyzed. Experimental results show that there are obvious response peak for the target and camouflage nets, however, because of the different position and angle of the target, the peak position is different. At the same time, the intensity of echo light from the background can not generate a strong response voltage. Therefore, the extreme signal of response voltage can be obtained to identify a camouflaged target in the entire magneto-optical modulation cycle. As for wavelength variable experiments, it had a certain influence for echo peak and background noise caused by the changes of the light source wavelengths. Therefor, it can be adjusted by the source wavelength increasing the SNR of target image. In short, the system has a good recognition ability for camouflage target.

李东明, 毕海平, 刘智超, 杨进华, 张丽娟, 王良, 陈桂芬. 基于双调制的反伪装目标探测系统研究[J]. 光谱学与光谱分析, 2017, 37(4): 1174. LI Dong-ming, BI Hai-ping, LIU Zhi-chao, YANG Jin-hua, ZHANG Li-juan, WANG Liang, CHEN Gui-fen. Research on Target Recognition System for Camouflage Target Based on Dual Modulation[J]. Spectroscopy and Spectral Analysis, 2017, 37(4): 1174.

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