Method for the sonar classification of underwater objects, notab

Details Method for the sonar classification of underwater objects, notab Method for the sonar classification of underwater objects, notab

1989-05-10

1990-08-21

Jordan, Charles T.

Communications, electrical: acoustic wave systems and devices

Echo systems

Side scanning or contour mapping sonar systems

367105, 367106, 367111, G01S 966

Patent

active

049512684

ABSTRACT:
In a sonar used to determine the characteristics of the underwater mines, the emission diagram in the vertical plane is modified to obtain two main lobes separated by a central zero value. At reception, the bearing/frequency display system shows a dark strip separated by two luminous strips. When the echo from a mine persists, in going through the dark zone, it is recognized that it pertains to a moored mine floating in the water, thus enabling moored mines to be identified and their submersion depth measured.

REFERENCES:
patent: 3618007 (1971-11-01), Anderson
patent: 4030096 (1977-06-01), Stevens et al.
patent: 4586048 (1986-04-01), Downie
patent: 4642801 (1987-02-01), Perny
patent: 4751645 (1988-06-01), Abrams et al.
Ultrasonics, May 1982, pp. 107-112, Butterworth & Co. Ltd., F. K. Lam et al.

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