| 水下目标的前向散射探测 |
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| 引用本文： | 雷波,杨坤德,牛婷婷,张同伟.水下目标的前向散射探测[J].电声技术,2009,33(9):49-52. |
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| 作者姓名： | 雷波 杨坤德 牛婷婷 张同伟 |
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| 作者单位： | 西北工业大学,声学工程研究所,陕西,西安,710072 |
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| 基金项目： | 国家自然科学基金，声场声信息国家重点实验室基金 |
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| 摘 要： | 当物体靠近双基地声呐基线时，由于直达波的干扰，声呐系统存在检测盲区。根据巴宾奈特原理．物体的前向散射目标强度要比其他方向高出15dB左右，占据着一定的扇区宽度。提出利用这种物理现象实现对目标的探测。研究发现，当物体穿过基线时，前向散射信号对声场产生扰动。对浅海信道中的物体散射声场进行建模分析．讨论前向散射探测系统的性能，并提出检测方法，仿真实验验证了方法的可行性。
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| 关 键 词： | 虚源 巴宾奈特原理 声散射 检测 |
Forward Scattering Detection of Underwater Target |
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| LEI Bo,YANG Kun-de,NIU Ting-ting,ZHANG Tong-wei.Forward Scattering Detection of Underwater Target[J].Audio Engineering,2009,33(9):49-52. |
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| Authors: | LEI Bo YANG Kun-de NIU Ting-ting ZHANG Tong-wei |
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| Affiliation: | LEI Bo,YANG Kun-de,NIU Ting-ting,ZHANG Tong-wei (Institute of Acoustic Engineering,Northwestern Polytechnical University,Xi'an 710072,China) |
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| Abstract: | The bistatic sonar can't detect the target nearby the baseline because of the effect of direct wave. The forward target strength is 15 dB above the other direction according to Babinet's principle,and the strong forward scattering occupies a certain sector. This phenomenon could be utilized for targets detection. It is found that the sound field is fluctuated by the forward scattering signal when targets pass through baseline. The scattering field in shallow water waveguide is modeled and analyzed. The perf... |
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| Keywords: | virtual source Babinet's principle acoustic scattering detection |
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