Proposal to Use Fish-Length-to-Wavelength Ratio Characteristics of Backscatter from Fish for Species Identification
Proposal to Use Fish-Length-to-Wavelength Ratio Characteristics of Backscatter from Fish for Species Identification
复制标题
利用鱼类反向散射的鱼长波长比特征进行物种识别的建议
DOI：
10.3135/jmasj.45.183
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
K. Amakasu
中科院分区：
文献类型：
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作者：
M. Furusawa;K. Amakasu
研究了利用鱼的反向散射频率依赖性（相对频率响应）识别鱼类的多频声学方法。该方法已成功地应用于广泛的识别，例如区分鳔鱼和非鳔鱼，但并不总是能够将声学相似的鱼类识别为鳔鱼。因此，为了提高识别能力，我们提出了一种利用鱼类间背向散射的鱼长波比（L / λ）特性差异（相对L / λ特性）来代替或与相对频率响应一起使用的方法。首先，我们从理论上证实了将相对L / λ特性应用于鱼类的长球散射模型的基本原理。其次，我们计算了几种鱼类模型的目标强度，并展示了使用相对L / λ特征的优势。第三，通过物种识别困难的实验实例，验证了该方法的有效性。最后，我们讨论了必要的和具有挑战性的程序，以了解鱼的长度和其他问题。
: The multi-frequency acoustic method to identify fish species using the frequency dependence of back scatter from fish (relative frequency response) has been investigated. The method has been successfully applied to broad identification, such as distinguishing between swimbladder and nonswimbladder fishes, but it is not always possible to identify acoustically similar fish species as swimbladder fishes. To improve identification power, we, therefore, propose a method that uses the difference of fish-length-to-wavelength ratio ( L / λ ) characteristics of backscatter among fish species (relative L / λ characteristic), instead of or together with the relative frequency response. We, first, theoretically confirm the rationale for using the relative L / λ characteristic with prolate-spheroid scattering models of fish. Second, we compute target strengths for several types of fish models, and show the advantage of using the relative L / λ characteristic. Third, using experimental examples in which species identification was difficult, we apply the proposed method and ascertain its effectiveness. Finally, we discuss the necessary and challenging procedure to know fish lengths and other issues.