复杂环境下目标探测与识别技术研究

发布时间：2018-04-12 12:50

本文选题：双光路探测 + 目标识别　；参考：《西安工业大学》2015年硕士论文

【摘要】：激光因具有很好的单色性、相干性以及抗电磁干扰等优点,被广泛应用于武器系统的目标指示、目标探测识别等。然而,云、薄雾、雨、雪等悬浮粒子对激光信号具有散射和衰减作用。当激光脉冲通过直径较大的雨滴时,会随机伴随着严重的后向散射,这将会被误判为目标的回波信号。本论文针对降雨环境下系统的误触发问题,研究激光探测系统在降雨中的目标识别方法,对扩展激光探测系统的应用范围有一定的参考价值。论文根据雨滴的物理特征以及激光在雨中传输的衰减、散射特性,推导了激光在降雨环境下的传输模型。分析雨滴作用于光电探测系统输出信号特点,以及雨滴信号与目标信号同时作用探测系统时的差异。利用雨滴和目标同时作用于探测区域的差异提取降雨环境下的目标特征,建立目标识别算法,给出复杂环境目标光电探测目标识别的设计方法-双光路光电探测识别方法。依据双光路探测方法完成相应的电路设计,并最终完成光电探测系统。根据双光路探测方法,完成光电探测系统试验平台的搭建并进行相关试验测试,对无降雨环境不同距离下目标探测识别试验和降雨环境近红外波段激光多组距离单／双光路目标探测识别试验的结果分析,得出双光路探测目标识别方法可以消除由环境因素引起的干扰。
[Abstract]:Because of its good monochromatic, coherence and anti-electromagnetic interference, laser is widely used in target indication, target detection and recognition of weapon systems.However, suspended particles such as clouds, mist, rain and snow can scatter and attenuate laser signals.When a laser pulse passes through a large raindrop, it will be accompanied by severe backscattering at random, which will be misjudged as the echo signal of the target.In this paper, the target recognition method of laser detection system in rainfall environment is studied, which has some reference value for extending the application range of laser detection system.According to the physical characteristics of raindrops and the attenuation and scattering characteristics of laser propagation in rain, the model of laser propagation in rainfall environment is derived.The characteristics of the output signal of the photoelectric detection system acting on the raindrop and the difference between the raindrop signal and the target signal acting simultaneously on the detection system are analyzed.Using the difference of raindrop and target acting on the detecting area simultaneously to extract the target characteristics in rainfall environment, the target recognition algorithm is established, and the design method of photoelectric detection target recognition in complex environment is presented, which is called double optical path photoelectric detection recognition method.The circuit design is completed according to the method of double optical path detection, and the photoelectric detection system is finally completed.According to the method of double optical path detection, the test platform of photoelectric detection system is built and the related test and test are carried out.The results of target detection and identification experiments in different distances in rainfall environment and in near-infrared laser band in rainfall environment with single / double optical path are analyzed.It is concluded that the dual optical path detection method can eliminate the interference caused by environmental factors.
【学位授予单位】：西安工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TJ5;TN249

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