Communications: electrical – Selective – Monitoring in addition to control
Patent
1975-02-03
1977-01-04
Farley, Richard A.
Communications: electrical
Selective
Monitoring in addition to control
340 6R, 343100SA, G01S 966, G01S 754
Patent
active
040017630
ABSTRACT:
A sonar system comprising a curved transducer array, typically in the form of a cylinder, in which the transducer elements are arranged in geometrically similar configurations on each of a plurality of planes having symmetry about a common axis. In the presence of an incident beam of radiant energy, the transducer elements are excited by signals having values of delay which vary from transducer to transducer in a regular pattern resulting from the symmetry of the array. This permits the utilization of a relatively small memory for the storing of delay values as a function of the bearing and tilt of the center line of a receiving beam relative to the axis of the array. The delay values are read out of the memory via switching and recycling circuitry to successively apply a sequence of delay values to delay elements coupled to the transducer elements to accomplish a steering of a transmitted or received beam in both elevation and azimuth. This permits the formation of a set of beams which are space stabilized independently of rolling and pitching movements of the array.
REFERENCES:
patent: 3646558 (1972-02-01), Campanella
patent: 3697994 (1972-10-01), O'Daniel
patent: 3859622 (1975-01-01), Hutchison et al.
Bartlett Milton D.
Farley Richard A.
Pannone Joseph D.
Raytheon Company
Warren David M.
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