Analysis and classification of broadband echoes using bio-inspired dolphin pulses.
Analysis and classification of broadband echoes using bio-inspired dolphin pulses.
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使用仿生海豚脉冲对宽带回波进行分析和分类。
DOI：
10.1121/1.3372754
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
P. Moore
中科院分区：
文献类型：
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作者：
Y. Pailhas;C. Capus;K. Brown;P. Moore
迄今为止，大多数声纳都使用窄带脉冲，通常只使用回波包络线进行目标检测和分类。本文通过对生物声纳宽带回波结构的分析和理解，阐述了生物声纳在目标识别和分类方面的优势。利用基于海豚的仿生声纳系统，结合从观察宽吻海豚执行物体识别任务中开发的生物激励脉冲，在波浪箱和港口进行了实验，并给出了实验结果。在这些实验中，测量和分析了不同目标对两种不同生物激励信号的响应。响应的差异表明信号设计和回波解释之间有很强的依赖性。在模拟和实验数据中，这些目标的共振现象在回波光谱中产生了强烈的凹痕和峰。由于这些波峰和波谷的定位精度约为1khz，这些位置对于目标的宽侧失谐是非常稳定的，它们可以用作分类的特征。这导致了宽带分类器的提出，该分类器通过提取目标回波光谱中的陷波位置来工作。
To date most sonars use narrow band pulses and often only the echo envelope is used for object detection and classification. This paper considers the advantages afforded by bio-inspired sonar for object identification and classification through the analysis and the understanding of the broadband echo structure. Using the biomimetic dolphin based sonar system in conjunction with bio-inspired pulses developed from observations of bottlenose dolphins performing object identification tasks, results are presented from experiments carried out in a wave tank and harbor. In these experiments responses of various targets to two different bio-inspired signals are measured and analyzed. The differences in response demonstrate the strong dependency between signal design and echo interpretation. In the simulations and empirical data, the resonance phenomena of these targets cause strong notches and peaks in the echo spectra. With precision in the localization of these peaks and dips of around 1 kHz, the locations are very stable for broadside insonification of the targets and they can be used as features for classification. This leads to the proposal of a broadband classifier which operates by extracting the notch positions in the target echo spectra.