| 水下激光距离选通成像系统的模型与极限探测性能研究 |
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| 引用本文： | 韩宏伟,张晓晖,葛卫龙. 水下激光距离选通成像系统的模型与极限探测性能研究[J]. 中国激光, 2011, 0(1) |
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| 作者姓名： | 韩宏伟 张晓晖 葛卫龙 |
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| 作者单位： | 海军工程大学兵器工程系; |
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| 基金项目： | 海装十一五预研基金资助课题 |
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| 摘 要： | 为了改善现有水下激光距离选通成像建模方法在收发时序和器件特性方面的不足,提出了一种改进的系统模型。该模型以一维(1D)方波信号为研究对象,通过计算该信号的输出信噪比来评价成像系统的性能。模型考虑了水下激光脉冲的时域展宽和增强型电荷耦合装置(ICCD)的增益噪声特性以对现有模型的不足进行改进。通过模拟计算与实际水下激光距离选通成像系统所采集的图像相对比的方法验证了模型正确性,又通过对系统在不同水质下极限探测距离的仿真计算表明距离选通技术对人形暗目标的探测、识别和认清距离达到了9,7.5和7个衰减长度,从而证明了距离选通技术能够有效探测劣质水况下的中小目标。
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| 关 键 词： | 成像 距离选通模型 信噪比 一维方波信号 时域展宽 |
Study of the Mode and Maximum Detecting Performance of Underwater Laser Range-Gated Imaging System |
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| Han Hongwei Zhang Xiaohui Ge Weilong. Study of the Mode and Maximum Detecting Performance of Underwater Laser Range-Gated Imaging System[J]. Chinese Journal of Lasers, 2011, 0(1) |
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| Authors: | Han Hongwei Zhang Xiaohui Ge Weilong |
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| Affiliation: | Han Hongwei Zhang Xiaohui Ge Weilong(Department of Weaponry Engineering,Naval University of Engineering,Wuhan,Hubei 430033,China) |
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| Abstract: | An advanced model of underwater laser range-gated imaging system is proposed in order to improve the shortcoming of present modeling methods in shoot-receive scheduling and instruments characteristic.One-dimensional(1D) rectangular signal is selected as the target,whose output signal to noise ratio(SNR) is used to evaluate the system performance.The time-domain broadening of pulse underwater and noise characteristic of intensified charge coupled device(ICCD) is integrated into the proposed model to improve ... |
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| Keywords: | imaging range-gated model signal to noise ratio one-dimensional rectangular signal time-domain broadening |
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