宽带参量阵技术在近海探测中的研究

发布时间：2018-06-17 03:10

本文选题：声呐 + 包络解调　；参考：《声学学报》2016年06期

【摘要】：文章针对非线性声学宽带参量阵技术应用于近海海底剖面绘制及掩埋物探测进行了分析研究。对于宽带参量阵声呐产生的差频信号利用Berktay包络解调理论和KZK(Khokhlov-Zabolotskaya-Kuznetsov)方程,对其进行了理论分析,水池实验研究和时域数值模拟,并结合声呐方程计算,说明该技术用于近海探测的可行性。本文同时结合脉冲压缩技术对产生的宽带差频信号做匹配处理,用于提高设备的垂直分辨率。最后在海试实验中,利用文中设计的参量阵声呐,分别使用宽带差频信号和单频差频信号对浅海海底沉积层和海底掩埋管线进行探测,取得了清晰的剖面图和掩埋物探测结果,验证了宽带参量阵技术在海底探测中的有效性和实用性。
[Abstract]:In this paper, the application of nonlinear acoustic broadband parametric array technology in offshore seabed profiling and buried detection is analyzed and studied. Using Berktay envelope demodulation theory and KZK Khokhlov-Zabolotskaya-Kuznetsov equation, the differential frequency signals generated by wideband parametric sonar are analyzed theoretically, studied experimentally and numerically simulated in time domain, and calculated with sonar equation. The feasibility of using this technique in offshore exploration is illustrated. At the same time, the pulse compression technique is used to match the wideband differential frequency signal, which is used to improve the vertical resolution of the equipment. Finally, in the sea trial experiment, using the parametric sonar designed in this paper, wideband differential frequency signal and single frequency difference frequency signal are used to detect the sediment layer and buried pipeline in shallow sea respectively, and the clear profile and the detection result of the buried material are obtained. The validity and practicability of wideband parametric array technology in submarine exploration are verified.
【作者单位】：中国科学院声学研究所东海研究站;
【基金】：上海市科委创新行动计划项目(12231203800)资助
【分类号】：P715;TB56

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