Communications – electrical: acoustic wave systems and devices – Transponders – With plurality of transponders
Patent
1990-06-01
1991-09-10
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Transponders
With plurality of transponders
367118, 367907, 367134, G01S 1500
Patent
active
050479903
ABSTRACT:
An acoustic data acquisition system for shipboard use is disclosed that allows for underwater acoustic data measurements at preselected submerged marine structural coordinates using a free swimming, quiet dynamically positionable remotely operated vehicle (ROV). Moreover, the disclosure provides a method of performing acoustic data acquisition with an ROV by first inputting the marine structural features by use of a computer aided design subsystem, determining the required trajectory path and hovering coordinates for data measurements, next, establishing the acoustic telemetry system for the remotely operated vehicle's control system to operate within and make an absolute positional fix to the marine structure's coordinates then, establish the ambient acoustic conditions of the worksite. The system is monitored and controlled from a computer based system. The system includes an ROV subsystem that operates in conjunction with a computer based long baseline underwater telemetry and positioning control subsystem, an acoustic transducer array attached to the ROV and a real time data-coordinate storage subsystem. A particular type of transducer suitable for use with this vehicle is a passive acoustic transducer array (hydrophones) that measures low level sound pressures and phase data that provides a detailed description of the sound power field emitted over the surface of the marine structure. Applications include oil/gas pipeline leak detection and location of malfunctioning underwater marine equipment.
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Gafos Adamandios G.
Halliwell Frank S.
Lynn Dana C.
Maxwell Donald
Sears Christopher N.
Marsh Luther A.
Pihulic Daniel T.
Sheinbein Sol
The United States of America as represented by the Secretary of
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