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Passive underwater acoustic identification tags using multi-layered shells.

Aprameya Satish¹, Karim G Sabra¹

¹Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.

The Journal of the Acoustical Society of America

|July 9, 2021

Summary

This summary is machine-generated.

Acoustic Identification (AID) tags offer a low-cost method for underwater navigation markers. This study optimizes AID tag design and confirms their detectability using sonar, enhancing autonomous underwater vehicle operations.

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Area of Science:

Underwater acoustics
Robotics and autonomous systems
Signal processing

Background:

Autonomous underwater vehicles (AUVs) require reliable navigation aids for undersea operations.
Passive underwater acoustic markers, or Acoustic Identification (AID) tags, offer a cost-effective solution.
AID tags generate unique acoustic signatures using multi-layer shells, functioning as acoustic barcodes.

Purpose of the Study:

To optimize the design of AID tags using energy-based metrics.
To evaluate the detectability of AID tags in the presence of interfering signals like clutter.
To demonstrate the proof of concept for AID tag detection in a reverberant environment.

Main Methods:

AID tag design optimization through energy-based metrics.
Matched-filter based techniques for evaluating detectability against interfering signals.
Experimental validation using high-frequency sonar in a reverberant water tank.

Main Results:

Optimized AID tag designs show improved performance.
AID tag detectability was assessed in the presence of simulated clutter.
Experimental results confirmed successful AID tag detection by standard sonar.

Conclusions:

Optimized AID tags can serve as effective geospatial markers for AUV navigation.
AID tags demonstrate robust detectability even in challenging underwater acoustic environments.
The findings support the practical application of AID tags for enhancing undersea autonomous operations.