PASSIVE UNDERWATER ACOUSTIC IDENTIFICATION TAGS
Abstract
Approved for Public Release.A critical need for operating AUVs is to obtain accurate 3D navigation and positioning information from the surrounding environment (e.g. for precise AUV docking on base station, AUV routing along planned trajectories, or seafloor mappi ng). To date, the vast majority of existing underwater navigation systems (e.g. short/long baseline system or acoustic beacons) requ ire the use of distributed active transponders (e.g. for triangulation purposes) which generates additional complexity and costs (e. g. due to powering, separate deployment, maintenance costs, etc.). On the other hand, AUVs equipped with high-frequency SONAR system s, capable of generating focused and narrow beams, could be also used to detect and read totally passive underwater acoustic markers with specifically engineered patterns, akin to laser readers for optical bar-codes. Such passive acoustic markers could be operated at significantly longer standoff distances compared to underwater camera-based system and even in turbid/murky waters where visibil ity is quasi-null. The objective of this project is to enable accurate 3D navigation and information signaling for AUVs using passi ve underwater Acoustic Identification (AID) tags capable of producing unique and programmable reflected acoustic signatures (i.e. echoes from its internal layering structure) when interrogated with high-frequency SONAR systems
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Nov 16, 2021
- Source ID
- N000142212007
Entities
People
- Karim G. Sabra
Organizations
- Georgia Tech Research Corporation
- Office of Naval Research
- United States Navy