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(11) | EP 4 063 614 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | INFORMATION TRANSMISSION SYSTEM, TRANSMITTER, RECEIVER, AND INFORMATION TRANSMISSION METHOD |
| (57) An information transmission system of the present invention transmits information
by using a mud pulse pressure signal to transmit information between a transmitter
located in an excavation part of an underground excavator and a receiver located on
the ground. The transmitter comprises a transmission information acquisition part
for acquiring information, and a pressure pulse generation part. The pressure pulse
generation part generates a pressure pulse so that an interval between the pressure
pulse and a just preceding or just subsequent pressure pulse is an interval corresponding
to the information acquired by the transmission information acquisition part. The
receiver comprises a pressure pulse detection part for detecting a pressure pulse,
and a reception information output part. The reception information output part outputs
information corresponding to the interval between the detected pressure pulse and
a just preceding or just subsequent pressure pulse.
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