Sonar apparatus

Details Sonar apparatus Sonar apparatus

1983-01-11

1986-02-18

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

Side scanning or contour mapping sonar systems

367106, 367151, G01S 752

Patent

active

045717117

ABSTRACT:
A sonar survey apparatus comprises a submersible vessel having a structure adapted to receive a towing cable. A sonar signal transmitter is mounted on the structure. At least one acoustic reflector is mounted on the structure and is shaped to produce, in a focussing plane, line foci of acoustic echo signals received from remote positions. A line array of receiver transducers are mounted on the structure in the focussing plane and extend in a line substantially at right angles to the line foci. Each receiver transducer element has an output for providing a signal representative of a focussed echo signal. A selector is coupled with the output of each of the receiver transducer elements and has a control input and an output. The selector is operable in response to the control signal to select the output of a receiver transducer element, relating to a predetermined direction, for display. A sensor is mounted on the body for detecting movement of the vessel relative to a predetermined orientation and for providing a control signal for the selector. Selection of a different receiver transducer element is thereby effected so that the selector means continues to provide an output relating to the predetermined direction.

REFERENCES:
patent: 3757286 (1973-09-01), Richard

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