OPTICAL FIBER LAYING METHOD BY USING ARCHIMEDES SPIRAL IN OPTICAL FREQUENCY DOMAIN REFLECTION

摘要

The present invention discloses an optical fiber laying method by using Archimedes spiral in optical frequency domain reflection, wherein the optical fiber laying method comprises the following steps: performing two measurements continuously via a two-dimensional strain sensing device, and performing cross-correlation operation on the two one-dimensional information of the local distance domain, and obtaining the strain variation of the one-dimensional information corresponding to the two measurements from the obtained cross-correlation information; deriving the two-dimensional angle information and curvature radius information of the plane to be measured corresponding to one-dimensional information in the local distance domain based on Archimedes spiral formula; deriving the position coordinates corresponding to the two-dimensional plane based on the curvature radius information and two-dimensional angle information; corresponding the strain variation of the one-dimensional information to the position coordinates corresponding to the two-dimensional plane to obtain the two-dimensional strain information. By using one fiber to measure the two-dimensional strain, the present invention realizes strain measurement in the transverse direction, the longitudinal direction and the synthetic direction thereof, solves the existing problem of insufficient sensitivity in multi-directional sensing, thus satisfies different requirements in the practical applications.