Fiber optic sensors and methods therefor
US6496265B1 · kind B1 · utility
28Cited by
1References
8Claims
0Family size
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Key dates
| Filing date | Feb 15, 2001 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | Feb 15, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/0079
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.