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Interpreting navigation sonar data for object detection: a feasibility study using the Ping360
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DOI：10.1007/s11227-025-08095-9.png)
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Abstract
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This study investigates the feasibility of repurposing the Blue Robotics Ping360—a low-cost, mechanically scanned single-beam sonar—for underwater object detection beyond its navigation role. It addresses three key questions: (i) what challenges arise when interpreting navigation sonar data in cluttered or reflective environments; (ii) how effective is manual annotation when combined with segmentation models such as U-Net; and (iii) whether affordable sonar can support complex object-level perception. Controlled pool experiments were conducted to examine acoustic artifacts including reflections, shadows, and range-dependent distortions. A manually annotated dataset was used to evaluate classical and deep-learning-based segmentation methods. Results show that preprocessing—near-field exclusion, denoising, and polar resampling—significantly improves detection clarity. Leveraging GPU-accelerated and data-parallel processing, the framework achieves scalable, near-real-time performance aligned with high-performance computing principles. The dataset and code are publicly available to encourage further research in dynamic and multi-sensor underwater perception.
Keywords:
Underwater object detection
Robotic perception
Single-beam sonar
Ping360 sonar data
Affordable sensing technology
Underwater robotics
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