Acoustic mine mechanism

Details Acoustic mine mechanism Acoustic mine mechanism

1955-02-08

1980-06-10

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Underwater system

Remote control

102 18R, 367136, F42B 2204, H04B 1100

Patent

active

042076234

ABSTRACT:
1. A system for providing an improved triggering function for firing of a ne from the acoustic signature of a ship passing thereover or in the vicinity thereto comprising means for detecting the envelope of a portion of the audio signature spectrum of the ship, means for deriving a signal corresponding to the logarithm of said detected envelope signal, means responsive to said logarithm signal for providing a signal represntative of the first time derivative thereof, means for subsequently obtaining a signal simulating the second time derivative of said logarithmic signal, means for inverting the phase of said second time derivative signal, means for providing a multiplication of said first and second time derivative signals, and means responsive to said multiplied signals for actuation of a mine detonating circuit.

REFERENCES:
patent: 3012503 (1961-12-01), Brown et al.

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