A METHOD FOR DETECTING STRUCTURAL DEFECTS OF FASCIATED YARN COMPRISING A CORE FROM PARALLEL FIBERS WHICH IS BOUND TOGETHER BY WRAPPER FIBERS AND WILD FIBERS, A DEVICE FOR PERFORMING THE METHOD, A COMPUTER PROGRAM FOR THE DEVICE AND A COMPUTER READABLE MEDIUM WITH THE COMPUTER PROGRAM

摘要

The invention relates to a method for detecting structural defects of fasciated yarn comprising a core formed by parallel fibers, whereby the core is bound together by a wrapping layer of fibers which comprises wrapper fibers and wild fibers, in which an image of the moving yarn is captured on at least a portion of the yarn length by at least one optical yarn sensor, whereby the optical yarn sensor comprises at least one row of radiation-sensitive elements and at least one radiation source and the optical sensor is connected to electronics equipped with software, whereby the captured yarn image is processed by a digital image analysis method to obtain data on the yarn surface structure, from the obtained data, changes in the yarn surface structure along the yarn length are evaluated, these changes in the yarn surface structure are compared with the pre-set criteria and if these changes in the yarn surface structure exceed these pre-set criteria, the relevant place of yarn is determined as occurrence of a structural defect of yarn. In addition, the invention relates to a device for performing the method, to a computer program and to a computer readable medium.