Patent ID: 11860008
Assignee: NANJING UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 5:
6. The method according to claim 5, wherein the method further comprises:
applying a to-be-detected vibration event on the to-be-detected fiber and simultaneously demodulating raw data corresponding to the three paths of the intermediate frequency signals, wherein the three paths of the intermediate frequency signals are first to third intermediate frequency signals, the first and second paths of the intermediate frequency signals have a same spatial resolution and the third path of the intermediate frequency signal has a different spatial resolution than the first and second paths of the intermediate frequency signal two groups; and
avoiding the coherent fading area based on the first and second paths of the intermediate frequency signals with the same spatial resolution, and selecting one spatial resolution in two groups of different spatial resolutions according to an event length of a vibration signal as an optimal resolution for a detection to restore the original signals.