Melt spinning spandex slice injection stretching dynamic detection method and system

The invention discloses a melt spinning spandex slice injection stretching dynamic detection method and system, and the method comprises the following steps: constructing an injection stretching process dynamic monitoring model based on a mechanical stretching system and an acoustic emission collection system by adopting a dual-channel sensor connection mode; the method comprises the following steps: preparing a tensile sample from melt-spun spandex slices through injection, and arranging a sensor probe on the tensile sample; performing parameter setting on the dynamic monitoring model and the arrangement of the sensor probe; on the basis of the dynamic monitoring model completing parameter setting and a sensor probe, inputting tensile sample parameters, and monitoring injection sheet stretching and acoustic emission of a tensile sample at the same time to obtain tensile curve data and acoustic emission signal data; and analyzing the tensile curve data and the acoustic emission signal data to obtain the damag