Distributed optical fiber sensing (DFOS) system and method of using the same
A distributed optical fiber sensing (DFOS) system includes a non-transitory computer readable medium configured to store instructions thereon. The DFOS system includes a processor connected to the non-transitory computer readable medium. The processor is configured to receive DFOS data from a sensor connected to an optical fiber, wherein the optical fiber is adjacent a roadway having a bridge. The processor is further configured to filter the DFOS data based on a frequency range. The processor is further configured to generate a plurality of spread features, wherein each spread feature of the plurality of spread features corresponds to a channel of a plurality of channels of the filtered DFOS data. The processor is further configured to perform binarization of the plurality of spread features. The processor is further configured to identify a location of the bridge along the roadway based on results of the binarization of the plurality of spread features.
1 . A distributed optical fiber sensing (DFOS) system comprising:
an optical fiber adjacent to a roadway having a bridge;
a distributed acoustic sensor connected to the optical fiber;
a non-transitory computer readable medium, wherein the non-transitory computer readable medium is configured to store instructions thereon; and
a processor connected to the non-transitory computer readable medium, wherein the processor is configured to execute the instructions for:
receiving DFOS data from the distributed acoustic sensor;
filtering the DFOS data based on a frequency range;
generating a plurality of spread features, wherein each spread feature of the plurality of spread features corresponds to a channel of a plurality of channels of the filtered DFOS data;
performing binarization of the plurality of spread features;
determining a threshold based on the results of the binarization;
performing a threshold processing of the filtered DFOS data based on the determined threshold; and
identifying a location of the bridge along the roadway based on results of the binarization of the plurality of spread features and a result of the threshold processing.
2 . The DFOS system according to claim 1 , wherein each of the plurality of spread features indicates a variation in vibration intensity within a corresponding channel of the plurality of channels, and a dimension of each of the plurality of channels is based on spatial resolution of the DFOS data.
3 . The DFOS system according to claim 1 , wherein the processor is further configured to execute the instructions for:
receiving the frequency range through an input/output (I/O) or network interface.
4 . The DFOS system according to claim 1 , wherein the processor is further configured to execute the instructions for:
determining the frequency range based on empirical data or using a trained neural network.
5 . The DFOS system according to claim 1 , wherein the processor is further configured to execute the instructions for:
determining a length of the bridge based on the filtered DFOS data.
6 . The DFOS system according to claim 1 , wherein the processor is further configured to execute the instructions for:
identifying an extra fiber portion of the optical fiber based on the DFOS data.
7 . The DFOS system according to claim 6 , wherein the processor is further configured to execute the instructions for:
identifying the extra fiber portion using a trained neural network.
8 . The DFOS system according to claim 6 , wherein the processor is further configured to execute the instructions for:
identifying the extra fiber portion prior to filtering the DFOS data based on the frequency range.
9 . A distributed optical fiber sensing (DFOS) method for controlling a DFOS system including a distributed acoustic sensor connected to an optical fiber adjacent to a roadway having a bridge, the method comprising:
receiving DFOS data from the distributed acoustic sensor;
filtering the DFOS data based on a frequency range;
generating a plurality of spread features, wherein each spread feature of the plurality of spread features corresponds to a channel of a plurality of channels of the filtered DFOS data;
performing binarization of the plurality of spread features;
determining a threshold based on the results of the binarization;
performing a threshold processing of the filtered DFOS data based on the determined threshold; and
identifying a location of the bridge along the roadway based on results of the binarization of the plurality of spread features and a result of the threshold processing.
10 . The DFOS method according to claim 9 , wherein each of the plurality of spread features indicates a variation in vibration intensity within a corresponding channel of the plurality of channels, and a dimension of each of the plurality of channels is based on spatial resolution of the DFOS data.
11 . The DFOS method according to claim 9 , further comprising:
receiving the frequency range through an input/output (I/O) or network interface.
12 . The DFOS method according to claim 9 , further comprising:
determining the frequency range based on empirical data or using a trained neural network.
13 . The DFOS method according to claim 9 , further comprising:
determining a length of the bridge based on the filtered DFOS data.
14 . The DFOS method according to claim 9 , further comprising:
identifying an extra fiber portion of the optical fiber based on the DFOS data.
15 . The DFOS method according to claim 14 , wherein identifying the extra fiber portion comprises using a trained neural network.
16 . The DFOS method according to claim 14 , wherein identifying the extra fiber portion comprises identifying the extra fiber portion prior to filtering the DFOS data based on the frequency range.
17 . A non-transitory computer readable medium storing a program that executes a method for controlling a distributed optical fiber sensing (DFOS) system including a distributed acoustic sensor connected to an optical fiber adjacent to a roadway having a bridge, the method comprising:
receiving DFOS data from the distributed acoustic sensor;
filtering the DFOS data based on a frequency range;
generating a plurality of spread features, wherein each spread feature of the plurality of spread features corresponds to a channel of a plurality of channels of the filtered DFOS data;
performing binarization of the plurality of spread features;
determining a threshold based on the results of the binarization;
performing a threshold processing of the filtered DFOS data based on the determined threshold; and
identifying a location of the bridge along the roadway based on results of the binarization of the plurality of spread features and a result of the threshold processing.
18 . The non-transitory computer readable medium according to claim 17 , wherein each of the plurality of spread features indicates a variation in vibration intensity within a corresponding channel of the plurality of channels, and a dimension of each of the plurality of channels is based on spatial resolution of the DFOS data.
19 . The non-transitory computer readable medium according to claim 17 , wherein the method further comprises:
identifying an extra fiber portion of the optical fiber based on the DFOS data.
20 . The non-transitory computer readable medium according to claim 19 , wherein the method further comprises:
identifying the extra fiber portion prior to filtering the DFOS data based on the frequency range.