A Wake Field Detection Mothod Using Laser Wavefront Variation
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摘要: 尾流场是舰艇在航行过程中形成一个含有大量微气泡和涡流的区域称之为尾流场,其声学、光学、热学及电磁学都与正常海水截然不同,通过对尾流光学等特征信号的探测,可以达到检测和跟踪尾流场的目的。激光在不同介质中传播时,其波前将发生变化,提出了一种利用激光通过尾流场后的波前变化检测尾流场的方法,通过对比激光经过静水和实验室模拟尾流模拟装置后波前的变化实现了检测尾流场的目的。实验结果表明,气泡对波前的影响不明显,涡流对波前的影响非常明显,当涡流越大时波前变化也越大,该方法的提出为提高光尾流检测能力提供了一种新的途径。Abstract: The physical characteristics of wake are very different from those of normal sea water, such as acoustic, optical, thermal and electromagnetic characteristics. So ship wake can be detected via its optical characteristic variation by laser. When laser propagates through ship wake, its wavefront varies, hence ship wake can be detected.Therefore, a wake field detection method using laser wavefront variation is presented in this paper. Experimental results show that the influence of micro-bubbles on wavefront variation is weak,but eddy flow imposes a significant effect on laser wavefront.This method may provide an approach to detect ship wake more effectively.
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Key words:
- laser wavefront /
- wake field /
- detection /
- micro-bubble /
- eddy flow
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[1] 冀邦杰,周德善,张建生. 基于舰船尾流光效应的制导鱼雷. 鱼雷技术,2000,31,(3): 40-43. [2] 张晓晖,雷选华等.舰船尾流激光制导方法的研究. 激光技术,2005,29(5):494-496. [3] 张裕士,田贵才. 微气泡激光散射特性研究. 通化师范学院学报,2007,28(4):9-11. [4] 刘慧开,杨立,沈良文,张毓芬.舰船尾流的激光散射特性.激光与红外,2003,33(4): 111-113. [5] 张建生,刘建康,冀邦杰,等.尾流气泡幕光学特性的数理模型.光子学报,2002,31(8):1032-1036.
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