Accession Number : ADD003178

Title :   Sonar System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Warner,Henry L

Report Date : 25 Nov 1975

Pagination or Media Count : 13

Abstract : The patent relates to a sonar system having means for controlling the angular beamwidth or resolution of a received acoustical signal. The sonar system includes a pair of hydrophones, a pair of tunnel diode switches for respectively producing marker pulses at the times negative-going zero-crossing acoustical signals make contact with said pair of hydrophones, a pair of variable differentiators for differentiating said marker pulses, an adder for adding said differentiated marker pulses, a coincidence detector for producing a squarewave type of signal the positive portion of which is proportional to selected periods of coincidence of said marker pulses in response to the addition thereof, an integrator for producing a voltage representing the integration of the positive portions of said squarewave type of signal, and a display for reading out said voltage.

Descriptors :   *Sonar, *Patents, Phase, Beam forming, Square waves, Sonar receivers

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE