Patent ID: 8700358
Filing Date: 2014-04-15
Classification: G01D,G01L

Abstract:
1. A method for obtaining final wavelength Optical Frequency Domain Reflectometry data from raw Fiber Bragg Grating sensor data, comprising the steps of: providing a light source that continuously interrogates a plurality of Fiber Bragg Gratings along at least one fiber, said Fiber Bragg Gratings written at the same wavelength, over one scan having a time period; receiving a stream of raw Fiber Bragg Grating sensor data from the plurality of Fiber Bragg Gratings; dividing the stream of raw Fiber Bragg Grating sensor data into a plurality of raw data segments, each raw data segment associated with a portion of the time period; using a processor to transform each of the raw data segments into functions representing frequency magnitude over time; plotting transformed raw data segments by frequency magnitude data versus time data; identifying the location of each grating on the at least one fiber from the plot of frequency magnitude data versus time data wherein the time data correlates to wavelength data; accumulating frequency magnitude data for each data segment; and, performing a center of mass calculation for each grating location with respect to the accumulated frequency magnitude data for each data segment to obtain final wavelength sensor data for each grating location.