Untethered, unpowered, rollable device to sense condition of pipeline wall
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United States of America Patent
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Jan 17, 2012
Grant Date -
Aug 28, 2008
app pub date -
Feb 7, 2006
filing date -
Feb 7, 2005
priority date (Note) -
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Abstract
A sensor unit for use in sensing conditions in a pipeline comprises an untethered a ball-shaped surround adapted to roll along the interior surface of a pipeline, and instrument package within the ball-shaped surround. The package contains at least one magnetometer or accelerometer. Preferably, three magnetometers, arranged orthogonally, are present. Other sensors can also be present as required, such as an acoustic sensor to detect leaks and a temperature or chemical sensor. Recording means record the data acquired by the magnetometer(s) or accelerometer and the sensors, and optionally also record a timing trace.
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