Apparatus and method for detecting pressure signals
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United States of America Patent
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Dec 17, 2013
Grant Date -
May 23, 2013
app pub date -
Jan 17, 2013
filing date -
Jan 17, 2008
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Abstract
An apparatus for detecting data in a fluid pressure signal in a conduit comprises an optical fiber loop comprises a measurement section and a delay section wherein the measurement section is disposed substantially circumferentially around at least a portion of the conduit, and wherein the measurement section changes length in response to the fluid pressure signal in the conduit. A light source injects a first optical signal in a first direction into the measurement section and a second optical signal in a second direction opposite the first direction into the delay section. An optical detector senses an interference phase shift between the first optical signal and the second optical signal and outputs a first signal related thereto.
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