| 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,(1):66~70 |
| 单矢量传感器DEMON谱检测技术研究 |
| Single vector sensor DEMON spectrum detection technique |
| 投稿时间：2004-09-29 修订日期：2005-02-24 |
| DOI： |
| 中文关键词: 矢量传感器 信号处理 DEMON |
| 英文关键词: vector sensor signal processing DEMON |
| 基金项目: |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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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