Wire detector

Details Wire detector Wire detector

1971-03-22

1990-11-13

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Underwater system

102402, 324 67, F42B 2242

Patent

active

049707019

ABSTRACT:
Disclosed is a system for locating a wire that is partially submerged wit water and partially extends out thereof which includes a transmitter for broadcasting radio frequency electromagnetic signals, a phase gradiometer for receiving said radio frequency electromagnetic signals after they have been received by that portion of said wire that extends out of said water and re-radiated by that portion of said wire that is submerged therein and for timely producing a pair of output signals in response thereto, a pair of constant output amplifiers for processing said pair of gradiometer output signals to identical useful levels, a phase comparator for determining the phase relationship between said pair of processed output signals, and a readout for indicating said phase relationship. The aforesaid phase gradiometer may be housed in a probe-type of mobile underwater vehicle which is towed by a tractor vehicle in such manner as to cause said phase gradiometer to traverse an underwater course in search of said wire.

REFERENCES:
patent: 1812392 (1931-06-01), Zuschlag
patent: 3617865 (1971-11-01), Hakata

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