| 单矢量传感器DEMON谱检测技术研究 |
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| 引用本文： | 姚爱红,惠俊英.单矢量传感器DEMON谱检测技术研究[J].声学技术,2006,25(1):66-70. |
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| 作者姓名： | 姚爱红 惠俊英 |
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| 作者单位： | 1. 哈尔滨工程大学计算机科学与技术学院,哈尔滨,150001
2. 哈尔滨工程大学水声工程学院,哈尔滨,150001 |
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| 摘 要： | 水声目标辐射噪声的包络谱中包含调制线谱(DEMON),不同类型的水声目标其DEMON谱不同,研究单矢量传感器利用DEMON谱检测目标信号的能力。采用文中定义的解析声强流方法,将单矢量传感器拾取的同一点的多信号源的振速矢量叠加统一描述在解析声强流的相位中,目标方位可以通过计算解析声强流的相位得到。仿真计算结果表明,这一方法对不同基频调制的宽带信号的检测能力可达-20dB,方位分辨能力在信噪比为-15dB时约为10°。对湖试数据的处理结果已证明本方法的可行性。
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| 关 键 词： | 矢量传感器 信号处理 DEMON |
| 文章编号： | 1000-3630（2006）-01-0066-05 |
| 收稿时间： | 2004-09-29 |
| 修稿时间： | 2004-09-292005-02-24 |
Single vector sensor DEMON spectrum detection technique |
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| YAO Ai-hong and HUI Jun-ying.Single vector sensor DEMON spectrum detection technique[J].Technical Acoustics,2006,25(1):66-70. |
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| Authors: | YAO Ai-hong and HUI Jun-ying |
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| Affiliation: | Department of Computer Science and Technology, Harbin Engineering University, Harbin 150001, China;Department of Underwater Acoustic, Harbin Engineering University, Harbin 150001, China |
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| Abstract: | The spectral envelope of noise radiated from underwater acoustic targets consists of modulation line components(DEMON).Based on the fact that different types of acoustic targets have different DEMON spectra,detection ability of single vector sensor with a DEMON spectrum is studied.A method for describing the vector accumulation as the phase of analytical acoustic intensity flux(AAIF) is discussed.Meanwhile,the AAIF phase indicates the target''s azimuth.Computer simulations show that the detection ability is -20dB for wideband noise modulated by various base frequencies.The azimuth resolving ability is 10°with-15dB signal-to-noise ratio. |
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| Keywords: | vector sensor signal processing DEMON |
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