Scraper conveyer straightness optical fiber sensing method and sensing system

The invention discloses an optical fiber sensing method and sensing system for straightness of a scraper conveyor. The sensing method comprises the following steps: acquiring horizontal direction strain and vertical direction strain of a corresponding grating detection point of the scraper conveyor by an optical fiber shape sensor; calculating the curvature in the horizontal direction and the curvature in the vertical direction of the grating measuring point according to a conversion formula of the strain and the bending curvature of the neutral axis; a plurality of interpolation nodes are inserted between the curvature values of two adjacent grating measuring points through a discrete interpolation algorithm; respectively converting the curvature in the horizontal direction and the curvature in the vertical direction into a horizontal coordinate value in a horizontal coordinate system and a vertical coordinate value in a vertical coordinate system through a gradient recursive algorithm, and superposing the h