Since GitHub has a data upload size limit, we have uploaded the data to Google Drive and Baidu Netdisk (link in the rawdata file). We also publicize codes for two common baseline models, which are the SVM (support vector machine, 1D method) and CNN (convolutional neural network, 2D ...
and feeding back output frequency of a control light source; in the data processing process, selecting phi-OTDR curves with the highest cross-correlation values from different curve groups as effective data, and abandoning other curves with relatively low cross-correlation values, thereby compensating ...
Furthermore a pulse generator adjusts a sequential relationship among the polarization maintaining switch unit, an acoustic-optical modulator and a subsequent data processing unit. The phi-OTDR reinforcing method and the device thereof have functions of eliminating sensitivity of the optical fiber to ...
Identification system's laser instrument links to each other with acoustic optic modem one end, and annular ware is connected to acoustic optic modem's the other end, and the circulator passes through optic fibre to be connected with photoelectric converter, and photoelectric converter, data ...
The acquired data are processed using a PC, where each frequency band is down-converted separately, followed by low-pass filtering and matched filtering. This process extracts the amplitude for positioning and simultaneously extracts the phase to reconstruct the vibration waveform. When the subcarrier...
To better demonstrate the linear characteristic of the phase change in the static region of coherent Φ-OTDR, based on the data in Figure 2c, we perform the differential operation between the maximum and minimum values of the phase change at every position of the fiber. Then, one position ha...