Rotating Acoustic Stereo Scanner for Positioning Loads onto the Seafloor: Preliminary Observations on an Experimental Model.
Final rept. Jul 71-Jun 72,
NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF
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An experimental model of a rotating acoustic stereo scanner RASS was tested in water depths to 115 feet to obtain pairs of sonar images and to determine the feasibility of using these stereo-image pairs to triangulate the positions of artificial sonar targets located at unknown elevations and radial distances. A high-resolution, side-looking sonar transducer with a maximum range of 80 feet was mounted on a hydraulically driven, rotating table attached to the top of a botton-resting tripod. Target recognition was performed manually on shore. It was determined that the best type of artificial target for acoustic triangulation is a triangular-shaped triplane having dimensions on the order of 1 foot. An angular scanning rate of 2.0 degsec produced images which presumably could be recognized electronically by Fourier transform techniques. Rotational scanning and acoustic triangulation could be completed within 100 seconds. Modified author abstract
- Marine Engineering
- Acoustic Detection and Detectors