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首页> 外文期刊>ICES Journal of Marine Science >A fisheries application of a dual-frequency identification sonar acoustic camera
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A fisheries application of a dual-frequency identification sonar acoustic camera

机译：双频识别声纳声学相机在渔业中的应用

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摘要

The uses of an acoustic camera in fish-passage research at hydropower facilities are being explored by the U.S. Army Corps of Engineers. The "Dual-Frequency Identification Sonar" (DIDSON) is a high-definition imaging sonar that obtains near-video quality images for the identification of objects underwater. Developed originally for the U.S. Navy by the University of Washington's Applied Physics Laboratory, it bridges the gap between existing fisheries-assessment sonar and optical systems. The images within 12m of this acoustic camera are sufficiently clear such that fish can be observed undulating as they swim and their orientation ascertained in otherwise zero-visibility water. In the 1.8 MHz high-frequency mode, this system comprises 96 beams over a 29° field-of-view. The high resolution and fast frame rate provide target visualization in real time. The DIDSON can be used where conventional underwater cameras would be limited by low light levels and high turbidity.
机译：美国陆军工程兵团正在探索在水电设施的鱼道研究中使用声像仪的方法。 “双频识别声纳”（DIDSON）是一种高清成像声纳，可获取接近视频质量的图像以识别水下物体。它最初是由华盛顿大学的应用物理实验室为美国海军开发的，它弥补了现有渔业评估声纳与光学系统之间的差距。该声波摄象机12m内的图像足够清晰，因此可以观察到鱼在游泳时起伏，并在零可见水中确定其方向。在1.8 MHz的高频模式下，该系统在29°的视场中包括96束光束。高分辨率和快速帧速率可实时提供目标可视化。 DIDSON可用于常规水下摄像机受弱光和高浊度限制的地方。

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