Method and device for suppressing interference fading noise of optical fibre sensing data

A device for suppressing interference fading noise of optical fibre sensing data, comprising a processor and a memory storing instructions executable by the processor to perform operations including:

• acquiring optical fibre sensing data not subjected to interference fading noise suppression;
• determining a fading point amplitude threshold based on the optical fibre sensing data;
• determining a signal fading point based on the fading point amplitude threshold;
• performing signal interpolation processing on the optical fibre sensing data corresponding to the signal fading point to obtain a signal subjected to interference fading noise suppression;
• and
• performing phase demodulation and phase unwrapping processing on the signal subjected to interference fading noise suppression to obtain processed optical fibre sensing data,
• wherein the determining a fading point amplitude threshold comprises:
• determining a preset reference position;
• determining, among the optical fibre sensing data, at least one set of reference optical fibre sensing data within a preset range of the preset reference position;
• generating a corresponding amplitude-phase diagram based on the at least one set of reference optical fibre sensing data;
• determining phase divergence information of the at least one set of reference optical fibre sensing data based on the amplitude-phase diagram;
• and
• determining the fading point amplitude threshold based on the phase divergence information.