Communications: electrical – Selective – Monitoring in addition to control
Patent
1975-12-10
1977-06-14
Farley, Richard A.
Communications: electrical
Selective
Monitoring in addition to control
340 6R, G01S 966, G01S 380
Patent
active
040300625
ABSTRACT:
In a procedure for determining the direction of echo signal pulses in a medium by means of a close range sonar system having at least one linear array of electroacoustic transducers and presenting a wide aperture angle and high azimuth and radial resolution, accurate determinations are made at a reduced component cost by: dividing the total aperture angle into a plurality of partial regions each having a respective median direction and an aperture angle ##EQU1## where c is the speed of sound in the medium, D is the length of the transducer array, and B is the bandwidth of the emitted signal pulses; subjecting the received signals associated with each partial region to a delay time compensation corresponding to its associated median direction; scanning the signals received by successive units of the transducers of said array at a selected frequency f.sub.s .sub.'; intermediately storing the scanned signals; sampling successive ones of the intermediately stored signals at a sampling frequency f.sub.s to form a serial signal; and phase compensating the resulting serial signal to produce a direction indication.
REFERENCES:
patent: 3835448 (1974-09-01), Bertheas
patent: 3967233 (1976-06-01), Maguer et al.
Diehl Reiner
Lutkemeyer-Hohmann Margitta
Farley Richard A.
Fried Krupp Gesellschaft mit beschrankter Haftung
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