Analytical device and optical fiber sensing method

Abstract

An object of the present invention is to provide an analysis device of an optical fiber sensing device and an optical fiber sensing method which are capable of controlling the influence of a positional deviation, caused by vibration, with a small processing load without deteriorating a spatial resolution. An analysis circuit 12 measures a spectral shift Δν (xi, t) for each section #i of an optical fiber 13 by using a measurement device 11 (steps S01, S02, Si1, and Si2), calculates an optical frequency modulation amount f(xi, t) for each section from the spectral shift, accumulates the optical frequency modulation amount of the section positioned closer to a near end side than an analysis position of the optical fiber 13 to calculate a cumulative value foffset(t) (step S03, step Si3), and corrects the analysis position xi based on the cumulative value (step Sa1).

Dependencies are inferred from the claim text.