Dry-type air-core reactor optical fiber sensing noise reduction method based on improved SVD (Singular Value Decomposition)

The invention discloses a dry-type air-core reactor optical fiber sensing noise reduction method based on improved SVD (Singular Value Decomposition). The improved SVD is applied to a distributed optical fiber sensing detection dry-type air-core reactor fault alarm system. Comprising the steps of establishing a backscattering model of a temperature measurement system, adding Gaussian white noise, and analyzing a signal-to-noise ratio by using traditional threshold denoising and improved SVD denoising, thereby providing a theoretical basis for an experiment. Under the existing conditions of a laboratory, original anti-Stokes light with temperature information and original Stokes light with temperature information are collected, the ratio is solved, a ratio data matrix is obtained, singular value decomposition and reconstruction are carried out after the data matrix is remodeled, a ratio signal with temperature information after noise reduction is obtained through matrix remodeling, the ratio signal is substitu