Traditional Culture Encyclopedia - Traditional virtues - What is the pulse coding method of wireless follow-drill inclinometer MWD?
What is the pulse coding method of wireless follow-drill inclinometer MWD?
Wireless drilling communication is divided into mud pulse communication, electromagnetic wave communication, wireline cable communication. At present, mud pulse communication is more commonly used, different pulsers, the coding method is not the same. Positive pulser, negative pulser, 650 hydraulic pulser, continuous wave pulser.
General positive pulser, negative pulser for the combination of code coding mode, with synchronization head and sequence number and data code, continuous wave is phase coding. Electromagnetic wave communication is mostly frequency modulation and amplitude modulation communication.
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