Full-parallel fiber large-strain demodulation displacement correction method based on dynamic time warping
By employing dynamic time warping algorithms and fully parallel computing, the problems of optical fiber position drift and scale distortion under large strain conditions were solved, achieving high-precision strain demodulation and breaking through the bottleneck of existing technologies.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGDONG UNIV OF TECH
- Filing Date
- 2026-04-20
- Publication Date
- 2026-07-17
AI Technical Summary
Under extreme conditions such as earthquake resistance in bridges and large deformation of surrounding rock in mines, fiber optic sensing systems suffer from position drift and scale distortion due to ultra-large axial strain, making it difficult for existing technologies to achieve high-precision strain demodulation.
By employing the Dynamic Time Warping (DTW) algorithm combined with a fully parallel computing architecture, nonlinear alignment of the reference scattering spectrum and the sensing scattering spectrum is achieved, the correspondence of scattering points is obtained, and the cumulative position offset is corrected, thus breaking through the linear matching limitation of traditional methods.
It achieves high-precision demodulation of fiber strain under ultra-large strain conditions, eliminates the effects of position drift and scale transformation, and improves the accuracy and efficiency of strain measurement.
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