Passive underwater acoustic markers using Bragg backscattering.
Passive underwater acoustic markers using Bragg backscattering.
复制标题
使用布拉格反向散射的无源水下声学标记。
DOI：
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发表时间：
2017
影响因子：
2.4
通讯作者：
K. Sabra
中科院分区：
文献类型：
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作者：
Prakhar Srivastava;B. Nichols;K. Sabra
这封信论证了被动水声标记技术(或“声码”)用于水下导航的可行性。声码标签是一种平面表面，具有机械加工的周期性图案，能够产生具有工程设计的空间和频率变化的布拉格后向散射波束图案，从而在选定的频带上具有独特的三维声学特征。因此，对于现有的高频声纳系统(可能安装在自主水下航行器上)，这些声码能够以完全被动的方式实现三维导航和信息信号发送，这些系统自然在一个狭窄的频段内运行，而且与基于光学的系统相比，还可以在更长的范围内使用。
This letter demonstrates the feasibility of a passive underwater acoustic marker technology (or "AcoustiCode") for use in underwater navigation. An AcoustiCode tag is a planar surface with machined periodic patterns capable of producing Bragg backscattering beampatterns with engineered spatial and frequency variations, thus having a unique three-dimensional acoustic signature over a selected frequency band. Hence, these AcoustiCodes enable three-dimensional navigation and information signaling in a totally passive manner for existing high-frequency SONAR systems (potentially mounted on autonomous underwater vehicles), which naturally operate in a narrow frequency band and can also be used over significantly longer ranges compared to optically-based systems.