Sonic direction finder

Details Sonic direction finder Sonic direction finder

1964-05-21

1979-03-06

Farley, Richard A.

Communications: electrical

Selective

Having indication or alarm

340 16P, 343113DE, G01S 380, G01S 384

Patent

active

041433513

ABSTRACT:
1. A direction finding system for determining the direction from which short sonic or ultrasonic pulses are incoming, comprising: a plurality of electroacoustic transducers forming a circular arrangement; electronic means for sequentially switching in and out pairs of diametrically opposed transducers; differential means having two inputs, respectively connected by said electronic means to said switched-in transducers, and an output for providing the differential output signal of each of said pairs; and means for deriving the phase of said output signal.

REFERENCES:
patent: 2728910 (1955-12-01), Fewings et al.
patent: 2767386 (1956-10-01), Ross
patent: 2866967 (1958-12-01), Bernbaum
patent: 2961636 (1960-11-01), Benecke
patent: 3105193 (1963-09-01), Denton
patent: 3108251 (1963-10-01), Corbett
patent: 3115633 (1963-12-01), Kramar et al.
patent: 3181159 (1965-04-01), Kramar et al.

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