Fiber optic sensors and methods therefor
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United States of America Patent
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Dec 17, 2002
Grant Date -
N/A
app pub date -
Feb 15, 2001
filing date -
Feb 16, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for calculating a distance from a fiber optic tip of a sensor to a reflective surface by high pass filtering a fringe signal gathered by a spectrometer, calculating a power spectral density of the filtered signal, and using a calibrated distance vs. peak spectral density wavelength curve to determine the measured distance. This fiber optic distance measurement technique can be applied to a variety of sensor types, including, but not limited to, pressure, displacement, temperature, acoustic, pressure, load, and magnetic field sensors.
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