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Proceedings Paper

Holographic analysis of the structural characteristics and operational dynamics of advanced sonar transducer arrays
Author(s): Howard Fein
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Paper Abstract

The recognition and discrimination of underwater targets by an active sonar array depends on its fundamental structural dynamics. The acoustic energy distribution projected from a dense, multi-element array is critically dependent on the effects of structural defects in the array and its interface on the water medium. Knowledge of these effects and defects is crucial in insuring correct array operation. Array dynamics are directly related to the mechanical and physical interfaces between transducers and their supporting and radiating structures. Such complex assemblies require sophisticated bonding and processing of compliant and rigid materials which determine the operational parameters of the sonar system. A nondestructive method for the visualization of anomalous structural characteristics would be of great value in both development and testing of sonar systems. Augmenting this with a method for visualizing and comparing the true near-field acoustic energy distribution of an active sonar array would also greatly increase the understanding of the contributions and effects of structural defects in the array and its interface to the water medium. Knowledge of the mechanisms for acoustic energy transfer through the sonar structure into the water medium can be derived from these visualizations and would enhance the analysis of returned signals for homing and target recognition in operation. Holographic interferometry has presented itself as a viable and useful method for the realization of this type of information.

Paper Details

Date Published: 24 May 1996
PDF: 10 pages
Proc. SPIE 2756, Automatic Object Recognition VI, (24 May 1996); doi: 10.1117/12.241146
Show Author Affiliations
Howard Fein, Polaris Research Group (United States)

Published in SPIE Proceedings Vol. 2756:
Automatic Object Recognition VI
Firooz A. Sadjadi, Editor(s)

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