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首页> 外文会议>Information Systems for Navy Divers and Autonomous Underwater Vehicles Operating in Very Shallow Water and Surf Zone Regions >Low-power high-resolution 3D sonar imaging system
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Low-power high-resolution 3D sonar imaging system

机译：低功耗高分辨率3D声纳成像系统

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Abstract: The need for multiple, cost-effective deployment of undersea acoustic mine-field reconnaissance and mine-hunting systems requires the development of light-weight, low-power, high- resolution sonars. These imaging sonars should be portable enough for use in a diver's hands or in a remote imaging sonar on an unmanned undersea vehicle in shallow waters. Under the support of the DARPA Sonoelectronics program, a system that can simultaneously focus many signals using multiple CCD/CMOS, programmable time-delay beamforming circuits connected to a sparsely-populated 2D acoustic array, is being developed. Using this approach, a real-time image could be formed to search for mine-like objects. To make a sparse array practical, the combination of low insertion loss and wide bandwidth performance is critical to realizing acceptable imaging performance with low illumination levels. In this system, a 20 cm diameter 2 MHz sparse array providing a 0.21 degree main beamwidth is proposed. Using this array, a real-time 2D cross-sectional scan of 128 $MUL 128 pixels is achievable with a down-range and cross-range resolution of approximately 1 cm at a range of 3 m. In this paper, the signal-to-clutter ratios as a function of array bandwidth and sparse-array elements placement are presented. Furthermore, the performance of a CCD/CMOS subarray processor will be reported. !14
机译：摘要：需要对海底声波雷声侦察和猎雷系统进行多种成本有效的部署，这需要开发轻巧，低功率，高分辨率的声纳。这些成像声纳应具有足够的便携性，以用于潜水员的手中或在浅水区的无人水下航行器上的远程成像声纳。在DARPA Sonoelectronics计划的支持下，正在开发一种可以使用多个CCD / CMOS同时聚焦许多信号的系统，该系统将可编程的延时波束形成电路连接到人口稀少的2D声学阵列。使用这种方法，可以形成实时图像以搜索类似地雷的物体。为了使稀疏阵列实用，低插入损耗和宽带宽性能的结合对于以低照度实现可接受的成像性能至关重要。在该系统中，提出了一个直径为20 cm的2 MHz稀疏阵列，可提供0.21度的主波束宽度。使用此阵列，可以在3 m的范围内以约1 cm的下距和跨范围分辨率实现128 $ MUL 128像素的实时2D横截面扫描。在本文中，提出了信噪比与阵列带宽和稀疏阵列元素放置的关系。此外，还将报告CCD / CMOS子阵列处理器的性能。 ！14

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