Acoustic transmitter and method for underwater pipeline inspection gauges
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United States of America Patent
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Jan 3, 2017
Grant Date -
Nov 5, 2015
app pub date -
Apr 30, 2014
filing date -
Apr 30, 2014
priority date (Note) -
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Abstract
A multiple frequency ping transmitter which can be carried by a pig which is used in an underwater pipeline. The ping transmitter produces a ping chord which includes a plurality of different tone frequencies which are simultaneously transmitted in the ping chord. Procedures are also provided wherein the multiple frequency ping transmitter is used in a system and method for located a pig which is stuck in the underwater pipeline or for determining the relative velocity of a moving pig.
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