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目前已应用的主要抗云雾干扰采用以下几种方法:截止距离法、近距盲区法、光学抑制法、视场对消法、参考视场法、形体识别法、激光/毫米波复合探测法、窄脉冲激光探测法、激光成像法等。其方法和效果对比见表1。
表 1 抗云雾干扰方法和效果表
Table 1. List of methods and effects for anti-aerosol-interference
Types of interference Interference characteristics Interference-weaken methods Effects of anti-interference Explanation Aerosol Extensibility of the scattering zone Settings of cut-off distance, reference view field, cancellation by symmetric view, optical field restraining Eliminated partly Verified not perfectly Penetrability and multi-layers scattering Settings of multi-range gates and multi- thresholds Eliminated partly Verified not perfectly Decrease the width of transmitted pulse Eliminated partly Devices in poor maturity Image characteristics of block or irregular shape of aerosol Image recognition Eliminated partly Devices in poor maturity Aerosol in reality environment Composite with Ka detectors Eliminated effectively Verified Perfectly Head on and trailing attack Composite with IR detectors Passive closing Limited
Study on techniques of anti-aerosol-interference for active optical target-detection device
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摘要: 激光近距探测装置(AOTD)在中低空和超低空使用时,云雾是一个重要干扰源,当飞行器略过云雾时,会导致AOTD虚警,甚至误输出执行信号。为了提高AOTD的在云雾中的工作能力,文中分析了AOTD工作原理和云雾的干扰原理。结合工程应用效果,总结了截止距离法、光学盲区法、光学抑制方法、视场对消法、参考视场法、形体识别法、激光/毫米波复合抗云雾干扰方法、窄脉冲/超窄脉冲激光探测法、激光成像法等。其中,激光/毫米波复合探测方法是更高效的方法。文末对各应用效果给出了初步的对比分析,有利于提高AOTD在云雾干扰环境中的工程应用性能,这些技术的综合应用,可以基本解决云雾干扰的问题,获得有效的抗干扰效果。Abstract: Aerosol-interference is a serious interference source for active optical target-detection device (AOTD) when it is used in lower sky or super low sky. When AOTD in a vehicle passes through aerosol, it may be wrong armed, even give out execution signal before right time. In order to increase the ability in aerosol environment, how the AOTD worked and how the aerosol interfered the AOTD were analyzed. It also showed out the techniques of anti-aerosol-interference used in engineering. The general techniques for anti-aerosol-interference were settings of cut-off distance method, weaken methods by optical parts, optical field restraining method, cancellation by symmetric views, setting reference view field, body recognition method, composite with Ka detectors, decreasing the width of transmitted pulse, image recognition method et al. Among these methods, the multimode detection method was a valuable way. Effects of different anti-interference methods were listed, the results shows integrated application of all the methods can increase the ability of AOTD.
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表 1 抗云雾干扰方法和效果表
Table 1. List of methods and effects for anti-aerosol-interference
Types of interference Interference characteristics Interference-weaken methods Effects of anti-interference Explanation Aerosol Extensibility of the scattering zone Settings of cut-off distance, reference view field, cancellation by symmetric view, optical field restraining Eliminated partly Verified not perfectly Penetrability and multi-layers scattering Settings of multi-range gates and multi- thresholds Eliminated partly Verified not perfectly Decrease the width of transmitted pulse Eliminated partly Devices in poor maturity Image characteristics of block or irregular shape of aerosol Image recognition Eliminated partly Devices in poor maturity Aerosol in reality environment Composite with Ka detectors Eliminated effectively Verified Perfectly Head on and trailing attack Composite with IR detectors Passive closing Limited -
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