Self-adaptive curve reconstruction method for array fiber grating shape sensor

The invention provides a self-adaptive curve reconstruction method for an array fiber grating shape sensor, and aims to overcome the defects in the prior art, select and reject sensing points by setting a curvature absolute value threshold value and a curvature derivative threshold value, reduce the required sensing points, reduce error accumulation and improve the accuracy of the sensing points. And meanwhile, the adaptability of the algorithm is improved, so that the algorithm can adapt to different deformation and continuous dynamic deformation conditions. In general, compared with a current mainstream algorithm, the method has the advantages that the accumulated error of shape calculation is reduced, and the reconstruction precision of the curve shape is improved; proper sensing points are automatically selected according to different shape changes, so that self-adaptive measurement point selection is realized; the overall calculation amount of curve shape reconstruction is reduced, and the reconstruction