Rotating Acoustic Stereo Scanner for Positioning Loads onto the Seafloor: Preliminary Observations on an Experimental Model.
Abstract
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 deg/sec 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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1973
- Accession Number
- AD0762409
Entities
People
- R. D. Hitchcock
Organizations
- Naval Facilities Engineering Service Center