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- Title
In-Lab Demonstration of an Underwater Acoustic Spiral Source.
- Authors
Viegas, Ruben; Zabel, Friedrich; Silva, Antonio
- Abstract
Underwater acoustic spiral sources can generate spiral acoustic fields where the phase depends on the bearing angle. This allows estimating the bearing angle of a single hydrophone relative to a single source and implementing localization equipment, e.g., for target detection or unmanned underwater vehicle navigation, without requiring an array of hydrophones and/or projectors. A spiral acoustic source prototype made out of a single standard piezoceramic cylinder, which is able to generate both spiral and circular fields, is presented. This paper reports the prototyping process and the multi-frequency acoustic tests performed in a water tank where the spiral source was characterized in terms of the transmitting voltage response, phase, and horizontal and vertical directivity patterns. A receiving calibration method for the spiral source is proposed and showed a maximum angle error of 3° when the calibration and the operation were carried out in the same conditions and a mean angle error of up to 6° for frequencies above 25 kHz when the same conditions were not fulfilled.
- Subjects
ACOUSTIC radiators; ACOUSTIC field; UNDERWATER navigation; SUBMERSIBLES; HYDROPHONE; LOCALIZATION (Mathematics); REMOTE submersibles
- Publication
Sensors (14248220), 2023, Vol 23, Issue 10, p4931
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s23104931