| 微弱信号检测原理在光尾流探测中的应用 |
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| 引用本文： | 徐晓燕,王海陆,冀邦杰,汤伟江.微弱信号检测原理在光尾流探测中的应用[J].现代电子技术,2008,31(9):124-126. |
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| 作者姓名： | 徐晓燕 王海陆 冀邦杰 汤伟江 |
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| 作者单位： | 1. 水下信息控制与处理重点实验室,陕西,西安,710075;西安精密机械研究所,陕西,西安,710075
2. 西安精密机械研究所,陕西,西安,710075 |
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| 摘 要： | 微弱信号的探测与提取是激光尾流探测的核心技术之一,详细介绍提高微弱信号检测能力的硬件实现及信号处理方法。提出了前置放大器的实现措施和以正交矢量锁定放大器为原理的光尾流信号检测方法。针对实际应用,对激光通过不同强度尾流后所接收的信号进行仿真。仿真结果表明,当尾流强度发生微弱变化时,锁定放大器输出信号幅度同时产生明显变化,利于光尾流信号的检测,验证了微弱信号检测原理在光尾流探测中的可行性。
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| 关 键 词： | 光尾流 微弱信号 前置放大 锁定放大 |
| 文章编号： | 1004-373X(2008)09-124-03 |
| 修稿时间： | 2007年11月8日 |
Application of Weak Signal Detection Principle in Lighting Wake Detection |
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| XU Xiaoyan,WANG Hailu,JI Bangjie,TANG Weijiang.Application of Weak Signal Detection Principle in Lighting Wake Detection[J].Modern Electronic Technique,2008,31(9):124-126. |
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| Authors: | XU Xiaoyan WANG Hailu JI Bangjie TANG Weijiang |
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| Abstract: | Weak signal detection and distilling is one of key technology in lighting wake detection.Methods of implementing of preamplifier and lock in amplifier based on quadratura vector theory is discussed.According to an actual application,processed signal amplitude crossing different intensity of wake is simulated.The simulation results show that signal amplitude is clearly diffrenent when intensity of wake changes weakly.The principle of weak signal detection is proved feasible by analysis results. |
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| Keywords: | lighting wake weak signal pre-amplifier lock in amplifier |
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