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Patent Searching and Data


Title:
UNDERWATER COMMUNICATION EQUIPMENT
Document Type and Number:
Japanese Patent JPS57107643
Kind Code:
A
Abstract:

PURPOSE: To avoid distance limit for a diver, by the communication of ultrasonic waves between the diver and a relay device and electromagnetic waves between the relay device and a person on land through the provision of the relay device on water.

CONSTITUTION: A diver 4 can communicate with a transceiver of a relay device 1 with an ultrasonic wave transceiver 5. The relay device 1 receives this communication and it is propagated in electromagnetic waves from an antenna 3. A person on land 7 can receive the electromagnetic waves with a transceiver 8 and can know the contents of communication. As to the communication from the person on land to the diver 4, it is done by the reverse path.


Inventors:
WATANABE MITSURU
KANEKO KAZUO
Application Number:
JP1980000183621
Publication Date:
July 05, 1982
Filing Date:
December 24, 1980
Export Citation:
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Assignee:
HITACHI NETSU KIGU KK
International Classes:
H04B11/00; H04B13/00; (IPC1-7): H04B1/00; H04B13/00