Hydraulic and earth engineering – Diving
Patent
1987-05-27
1989-05-23
Corbin, David H.
Hydraulic and earth engineering
Diving
367141, 367910, 114312, B63C 1148
Patent
active
048325325
ABSTRACT:
An apparatus for carrying by a diver while underwater that provides information useful for enabling the diver to expeditiously and safely work on submerged vessels without the danger of tapping into an explosive gas. The invention is particularly useful for finding liquid/gas boundary in a submerged vessel or the pressure of liquid or gas behind the wall of a vessel. A transmitting transducer provides a low frequency acoustic tone burst that is transmitted toward the hull of the ship. The reflected signal from the inner surface of the hull is received by a hydrophone and processed. Electronic circuit means, responsive to the received signal, processes the signal and computes the location of a liquid/gas interface or the presence of liquid or gas behind the hull. A display provides indications of the computed values.
REFERENCES:
patent: 3434443 (1969-03-01), Estabrook
patent: 3626703 (1971-12-01), Richburg
patent: 4010619 (1977-03-01), Hightower et al.
patent: 4212258 (1980-07-01), Collins
Beard Ralph E.
House Larry J.
Myers John R.
Nagabhusan Senapati
Battelle (Memorial Institute)
Corbin David H.
Wiesman Klaus H.
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