基于亮区-亮点模型的水下近场目标回波建模方法

关震宇; 李 杰; 牛三库

doi:10.11993/j.issn.1673-1948.2013.06.013

基于亮区-亮点模型的水下近场目标回波建模方法

doi: 10.11993/j.issn.1673-1948.2013.06.013

北京理工大学机电学院, 北京, 100081

基金项目: 国防科技预先研究课题资助(513050203)

详细信息

作者简介:
关震宇(1987-), 男, 在读博士, 研究方向为水下阵列信号处理.

中图分类号: TJ630.34
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- 文章访问数: 780
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- 被引次数: 0
出版历程
- 收稿日期: 2013-07-30
- 修回日期: 2013-08-19
- 刊出日期: 2013-12-20

Modeling Method of Target Echo in Underwater Near Field Based on Highlight Zones-Hightlights Model

School of Mechatronic Engineering, Beijing Institute of Technology, Beijing 100081, China

摘要

摘要: 考虑工作在近场区的水中兵器声探测系统目标特性建模的需求, 提出了一种基于亮区-亮点模型的水下近场目标回波建模方法。本方法首先对目标物进行面元划分, 使得每一个面元相对于换能器均工作在远场区, 之后通过换能器的指向性确定目标物属于亮区的面元, 最后应用亮点法对于每个面元的回波进行预测并叠加, 最终获得水下近场目标物的回波信息。本文通过对椭球目标物进行建模, 且模拟了其在侧弦90°入射和侧弦30°入射2种情况的回波, 并与真实情况下回波信号进行对比, 结果显示, 采用该方法所建的模型在近场情况下可有效模拟回波的幅值、时延和脉宽等信息, 并对于回波波形具有一定的模拟精度。
- 声探测 /
- 亮区-亮点模型 /
- 近场目标 /
- 回波预测
Abstract: To meet the demand for target characteristics modeling of acoustic detection system for underwater weapon in near field, we propose a modeling method of target echo in underwater near field based on the highlight zones-highlights model. Firstly, the target is divided into a series of surface elements in order to ensure each element is located in the far field region of a transducer. Then, the directivity function of the transducer is used to determine the surface elements which are located in the highlight zones of target. Finally, a highlights model is established to achieve the information of target echo by predicting and accumulating the echo of each surface element in highlight zones. A tank experiment is carried out to analog the echoes of an ellipsoidal target in 90°and 30°incidences at side board, and a group of real echoes is achieved. In addition, a simulation is also carried out to compare the results with the experimental ones. It is concluded that the proposed model can simulate the amplitude, time delay and pulse width of the echo effectively, and it can simulate the echo waveform with certain accuracy.
- acoustic detection /
- highlight zones-highlights model /
- near field target /
- echo prediction

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参考文献(7)

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