Method for calculating elongation at break of collagen casing at low temperature

The invention relates to the technical field of collagen casing detection, solves the technical problems of obvious errors and low accuracy in calculation of the elongation at break of a collagen casing in the prior art, and particularly relates to a method for calculating the elongation at break of the collagen casing at a low temperature. The method comprises the following steps: S1, building a detection platform for slowly stretching the collagen casing in the axial direction and recording stretching data; and S2, synchronously scanning the collagen casing in the continuous stretching deformation state by using an eddy current probe to obtain scanning data. According to the method, the influence of errors of cracks on the calculation of the elongation at break of the collagen casing can be eliminated, and meanwhile, the cracks caused by stretching are quickly identified and calculated in a low-temperature environment, so that the calculation precision of the elongation at break of the collagen casing in th