Pipeline communication system
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United States of America Patent
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-
Dec 24, 2002
Grant Date -
N/A
app pub date -
Nov 16, 1999
filing date -
Sep 26, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pipeline communication system. The system uses the pipeline and the adjacent ground and includes branches with junctions. Governor modules and transformers/rectifiers form part of the network. Monitors periodically provide information to the network controller. The system control receives information by way of an outstation to provide two-way communication and control using the pipeline and adjacent ground as conductors. Typically, the information in the form of fast frequency shift keying modulation is superimposed on the cathodic pipe protection system.
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