Sonar apparatus with means to transmit and print on alternate cy

Details Sonar apparatus with means to transmit and print on alternate cy Sonar apparatus with means to transmit and print on alternate cy

1983-07-01

1986-09-16

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

G01S 1596

Patent

active

046126333

ABSTRACT:
A sonar system for indicating the presence of sonic energy reflecting interfaces in the water in the path of a downgoing sonic pulse. The received reflection or echo is recorded on a moving record or web by means of a stylus that is traversed across the web as a linear function of time. The movement of the stylus triggers the transmitted pulse and the received signal is then amplified and controls a high voltage source which generates a series of pulses applied by the stylus as it moves across the record. Under certain operating conditions there is considerable noise generated in the water by the sonic pulse due to the presence of many reflecting surfaces from sediment, algae, plankton, etc. which sustains the return signal to the transducer. A disable system is provided which on command of the operator will disable the operation of the transmitter and receiver on alternate operating cycles to provide time for this noise to attenuate.

REFERENCES:
patent: 2350994 (1944-06-01), Anderson
patent: 2610244 (1952-09-01), Wolf
patent: 3013246 (1961-12-01), Bolzmann
patent: 3852705 (1974-12-01), Backman, Jr. et al.
patent: 4013991 (1977-03-01), Balcom
patent: 4186372 (1980-01-01), Maloy

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