Pressure wave transmission apparatus for data communication in a liquid comprising a plurality of rotors, pressure wave receiving apparatus comprising a waveform correlation process, pressure wave communication system and program product
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United States of America Patent
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Jun 27, 2017
Issued Date -
N/A
app pub date -
Apr 3, 2013
filing date -
Apr 4, 2012
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Abstract
A transmission apparatus is a transmission apparatus that generates a pressure wave for transmitting data in drilling mud, and includes a tubular member, a plurality of valves that are provided side by side in an axial direction of the tubular member inside the tubular member, each of which includes a stator including holes for passing the drilling mud, and a rotatable rotor which is provided to overlap the stator and includes blocking portions blocking the holes in the stator according to a rotation position, a motor that rotates the respective rotors, and a control unit that controls the motor 130 so as to rotate and stop the respective rotors at frequencies different from each other, according to data to be transmitted.
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