| 刘昊,刘维,刘纪元.合成孔径成像中掩埋目标的深度误差分析[J].声学技术,2015,34(3):214~218 |
| 合成孔径成像中掩埋目标的深度误差分析 |
| The depth error analysis in synthetic aperture sonarimaging of buried target |
| 投稿时间：2014-02-25 修订日期：2014-05-06 |
| DOI：10.3969/j.issn1000-3630.2015.03.005 |
| 中文关键词: 面阵合成孔径声呐 掩埋目标 三维成像 深度误差 |
| 英文关键词: planar synthetic aperture sonar buried target 3D imaging depth error |
| 基金项目:海洋公益性行业科研专项经费(2013418026)、国家自然科学基金青年基金(11204343)和哈尔滨工程大学重点实验室基金(9140C27020112022601)资助项目。 |
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| 中文摘要: |
| 在掩埋目标三维成像过程中,沉积层底质的不同与掩埋深度的变化,会使成像结果中目标深度与真实深度出现偏差。针对这一问题,可以利用下视的面阵合成孔径三维成像算法,通过构建水下分层模型与声速剖面模型,对掩埋点目标进行三维成像仿真。通过改变沉积层底质与掩埋深度,从理论分析与仿真结果研究深度误差的变化。研究表明,深度误差随沉积层声速和掩埋深度的增加而不断变大。 |
| 英文摘要: |
| The difference of the sediment and the change of buried depth would lead to error between the imaging depth and the real depth during the 3D imaging of the buried target. As to this problem, the down-look planar SAS (Synthetic Aperture Sonar) 3D algorithm can be used to image a buried point target by modeling underwater structure and sound velocity profile. The variation of the depth error is analyzed by changing the sediment and the buried depth in simulation. Research shows that the depth error becomes larger with the increase of the sound velocity of sediment and the buried depth. |
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