Detection and classification for multi-beam sonar systems

Details Detection and classification for multi-beam sonar systems Detection and classification for multi-beam sonar systems

1965-06-08

1991-09-10

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367121, G01S 1500

Patent

active

050479938

ABSTRACT:
An array of sonar transmitting and receiving transducers are so physically rranged and their signal voltage so combined as to form beams pointing to various points of the compass. In this invention a signal is formed on a different conductor for each beam and the conductors are wiped in rapid succession to determine the presence of any beam signal. Since any signal may be short-lived the total sampling process must be in milliseconds. Any signal that occurs is converted to digital form and is fed into a first recirculating delay line time compression storage loop. All signals are stored in the first loop. Then the cluster of signals pertaining to one beam is read out to a second recirculating delay line time compression storage loop from when it is read out to a variable frequency super-heterodyne and displayed on a cathode ray tube.

REFERENCES:
patent: 2958039 (1960-10-01), Anderson

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