Fibre optic acoustic sensing
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United States of America Patent
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Apr 18, 2017
Grant Date -
Jun 7, 2012
app pub date -
Aug 21, 2009
filing date -
Aug 21, 2008
priority date (Note) -
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Abstract
This invention relates to the fiber optic distributed acoustic sensing to detect P and S waves in a solid medium. Distributed acoustic sensing can be achieved using an unmodified fiber optic by launching optical pulses into the fiber and detecting radiation which is Rayleigh backscattered there from. By analyzing the returns in analysis bins, acoustic disturbances can be detected in a plurality of discrete longitudinal sections of the fiber. The present invention extends such fiber distributed acoustic sensing to detection of S and P waves.
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International Classification(s)
- G01H:MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC....
- G01M:TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR S....
- G01N:INVESTIGATING OR ANALYSING MATERIALS BY DETERMININ....
- F17D:PIPE-LINE SYSTEMS; PIPE-LINES
- G01P:MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, D....
- G01D:MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VAR....
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