Imaging system and associated method for surveying underwater ob

Details Imaging system and associated method for surveying underwater ob Imaging system and associated method for surveying underwater ob

1998-03-17

1999-07-27

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Echo systems

Side scanning or contour mapping sonar systems

G01S 1589

Patent

active

059301996

ABSTRACT:
A system for surveying an underwater topography includes an ultrasonic sensor array disposable in physical contact with a body of water for generating electrical signals encoding ultrasonic echo responses of underwater objects in the body of water. The sensor array includes a plurality of electromechanical transducers in turn including at least one electroacoustic transducer and one acoustoelectric transducer. The transducers are disposed in a configuration extending in at least two dimensions. An a-c current generator is operatively connected to the electroacoustic transducer for energizing the electroacoustic transducer with an electrical signal of a pre-established ultrasonic frequency. Means are provided which operatively connected to the sensor array for determining locations of the electromechanical transducers relative to one another. A processor or computer is operatively connected to the sensor array for analyzing the electrical signals in accordance with the determined locations of the electromechanical transducers to determine surfaces of objects disposed at least partially in the body of water and for generating a video signal encoding an image of the objects. A video monitor is operatively connected to the processing means for displaying the image of the objects.

REFERENCES:
patent: 4197591 (1980-04-01), Hageman
patent: 4403311 (1983-09-01), Tournois
patent: 5184330 (1993-02-01), Adams et al.

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