Sensors system and method incorporating fibre bragg gratings
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United States of America Patent
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Issued Date -
Jun 17, 2004
app pub date -
Oct 9, 2003
filing date -
May 9, 2001
priority date (Note) -
Abandoned
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Abstract
A sensor system comprises first and second fibre bragg gratings (FBGs). The two fibre bragg gratings receive light from a common light source and produce respective measurement signals having a spectrum dependent on a measurement signals having a spectrum dependent on a measurand, and a common reference signal. The two measurement signals pass through respective edge filters to respective detectors and a third detector monitors the reference intensity. A processor produces a value for the measurand from the received and detected signals. The system can be used in a temperature compensated strain gauge.
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